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u-boot/lib/rsa/rsa-sign.c

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-06 21:58:06 +00:00
// SPDX-License-Identifier: GPL-2.0+
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
/*
* Copyright (c) 2013, Google Inc.
*/
tools: avoid OpenSSL deprecation warnings Our Gitlab CI buildsystem is set up to treat warnings as errors. With OpenSSL 3.0 a lot of deprecation warnings occur. With the patch compatibility with OpenSSL 1.1.1 is declared. In the long run we should upgrade our code to use the current API. A -Wdiscarded-qualifiers warning is muted by casting. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2021-12-18 10:25:12 +00:00
#define OPENSSL_API_COMPAT 0x10101000L
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
#include "mkimage.h"
rsa: don't use malloc.h in rsa-sign.c stdlib.h is the header for malloc since at least c89/c90. There is no system malloc.h on OpenBSD and trying to use malloc.h here falls back to the U-Boot malloc.h breaking the build of qemu_arm64. Fixes: 336d4615f8 ("dm: core: Create a new header file for 'compat' features") Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
2020-05-15 12:20:34 +00:00
#include <stdlib.h>
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
#include <stdio.h>
#include <string.h>
#include <image.h>
#include <time.h>
lib/rsa: Make fdt_add_bignum() available outside of RSA code fdt_add_bignum() is useful for algorithms other than just RSA. To allow its use for ECDSA, move it to a common file under lib/. The new file is suffixed with '-libcrypto' because it has a direct dependency on openssl. This is due to the use of the "BIGNUM *" type. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 18:45:11 +00:00
#include <u-boot/fdt-libcrypto.h>
rsa: Fix build with OpenSSL 1.1.x The rsa_st struct has been made opaque in 1.1.x, add forward compatible code to access the n, e, d members of rsa_struct. EVP_MD_CTX_cleanup has been removed in 1.1.x and EVP_MD_CTX_reset should be called to reinitialise an already created structure.
2017-05-08 19:31:19 +00:00
#include <openssl/bn.h>
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
#include <openssl/ec.h>
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include <openssl/evp.h>
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
#include <openssl/engine.h>
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
static int rsa_err(const char *msg)
{
unsigned long sslErr = ERR_get_error();
fprintf(stderr, "%s", msg);
fprintf(stderr, ": %s\n",
ERR_error_string(sslErr, 0));
return -1;
}
/**
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
* rsa_pem_get_pub_key() - read a public key from a .crt file
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
*
* @keydir: Directory containins the key
* @name Name of key file (will have a .crt extension)
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
* @evpp Returns EVP_PKEY object, or NULL on failure
doc: replace @return by Return: Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 17:05:50 +00:00
* Return: 0 if ok, -ve on error (in which case *evpp will be set to NULL)
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
*/
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
static int rsa_pem_get_pub_key(const char *keydir, const char *name, EVP_PKEY **evpp)
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
{
char path[1024];
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
EVP_PKEY *key = NULL;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
X509 *cert;
FILE *f;
int ret;
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
if (!evpp)
return -EINVAL;
*evpp = NULL;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
snprintf(path, sizeof(path), "%s/%s.crt", keydir, name);
f = fopen(path, "r");
if (!f) {
fprintf(stderr, "Couldn't open RSA certificate: '%s': %s\n",
path, strerror(errno));
return -EACCES;
}
/* Read the certificate */
cert = NULL;
if (!PEM_read_X509(f, &cert, NULL, NULL)) {
rsa_err("Couldn't read certificate");
ret = -EINVAL;
goto err_cert;
}
/* Get the public key from the certificate. */
key = X509_get_pubkey(cert);
if (!key) {
rsa_err("Couldn't read public key\n");
ret = -EINVAL;
goto err_pubkey;
}
fclose(f);
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
*evpp = key;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
X509_free(cert);
return 0;
err_pubkey:
X509_free(cert);
err_cert:
fclose(f);
return ret;
}
/**
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
* rsa_engine_get_pub_key() - read a public key from given engine
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
*
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
* @keydir: Key prefix
* @name Name of key
* @engine Engine to use
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
* @evpp Returns EVP_PKEY object, or NULL on failure
doc: replace @return by Return: Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 17:05:50 +00:00
* Return: 0 if ok, -ve on error (in which case *evpp will be set to NULL)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
*/
static int rsa_engine_get_pub_key(const char *keydir, const char *name,
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
ENGINE *engine, EVP_PKEY **evpp)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
{
const char *engine_id;
char key_id[1024];
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
EVP_PKEY *key = NULL;
if (!evpp)
return -EINVAL;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
*evpp = NULL;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
engine_id = ENGINE_get_id(engine);
if (engine_id && !strcmp(engine_id, "pkcs11")) {
if (keydir)
lib: rsa: avoid overriding the object name when already specified If "object=" is specified in "keydir" when using the pkcs11 engine do not append another "object=<key-name-hint>". This makes it possible to use object names other than the key name hint. These two string identifiers are not necessarily equal. Signed-off-by: Jan Luebbe <jlu@pengutronix.de> Signed-off-by: Bastian Krause <bst@pengutronix.de> Reviewed-by: George McCollister <george.mccollister@gmail.com>
2020-05-13 10:26:24 +00:00
if (strstr(keydir, "object="))
snprintf(key_id, sizeof(key_id),
"pkcs11:%s;type=public",
keydir);
else
snprintf(key_id, sizeof(key_id),
"pkcs11:%s;object=%s;type=public",
keydir, name);
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
else
snprintf(key_id, sizeof(key_id),
"pkcs11:object=%s;type=public",
name);
lib: rsa: add support to other openssl engine types than pkcs11 There are multiple other openssl engines used by HSMs that can be used to sign FIT images instead of forcing users to use pkcs11 type of service. Relax engine selection so that other openssl engines can be specified and use generic key id definition formula. Signed-off-by: Vesa Jääskeläinen <vesa.jaaskelainen@vaisala.com> Cc: Tom Rini <trini@konsulko.com>
2019-06-16 17:53:38 +00:00
} else if (engine_id) {
if (keydir)
snprintf(key_id, sizeof(key_id),
"%s%s",
keydir, name);
else
snprintf(key_id, sizeof(key_id),
"%s",
name);
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
} else {
fprintf(stderr, "Engine not supported\n");
return -ENOTSUP;
}
key = ENGINE_load_public_key(engine, key_id, NULL, NULL);
if (!key)
return rsa_err("Failure loading public key from engine");
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
*evpp = key;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
return 0;
}
/**
* rsa_get_pub_key() - read a public key
*
* @keydir: Directory containing the key (PEM file) or key prefix (engine)
* @name Name of key file (will have a .crt extension)
* @engine Engine to use
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
* @evpp Returns EVP_PKEY object, or NULL on failure
doc: replace @return by Return: Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 17:05:50 +00:00
* Return: 0 if ok, -ve on error (in which case *evpp will be set to NULL)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
*/
static int rsa_get_pub_key(const char *keydir, const char *name,
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
ENGINE *engine, EVP_PKEY **evpp)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
{
if (engine)
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
return rsa_engine_get_pub_key(keydir, name, engine, evpp);
return rsa_pem_get_pub_key(keydir, name, evpp);
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
}
/**
* rsa_pem_get_priv_key() - read a private key from a .key file
*
* @keydir: Directory containing the key
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
* @name Name of key file (will have a .key extension)
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
* @evpp Returns EVP_PKEY object, or NULL on failure
doc: replace @return by Return: Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 17:05:50 +00:00
* Return: 0 if ok, -ve on error (in which case *evpp will be set to NULL)
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
*/
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
static int rsa_pem_get_priv_key(const char *keydir, const char *name,
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
const char *keyfile, EVP_PKEY **evpp)
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
{
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
char path[1024] = {0};
FILE *f = NULL;
if (!evpp)
return -EINVAL;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
*evpp = NULL;
lib/rsa: Use the 'keyfile' argument from mkimage Keys can be derived from keydir, and the "key-name-hint" property of the FIT. They can also be specified ad-literam via 'keyfile'. Update the RSA signing path to use the appropriate one. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 18:45:18 +00:00
if (keydir && name)
snprintf(path, sizeof(path), "%s/%s.key", keydir, name);
else if (keyfile)
snprintf(path, sizeof(path), "%s", keyfile);
else
return -EINVAL;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
f = fopen(path, "r");
if (!f) {
fprintf(stderr, "Couldn't open RSA private key: '%s': %s\n",
path, strerror(errno));
return -ENOENT;
}
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
if (!PEM_read_PrivateKey(f, evpp, NULL, path)) {
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
rsa_err("Failure reading private key");
fclose(f);
return -EPROTO;
}
fclose(f);
return 0;
}
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
/**
* rsa_engine_get_priv_key() - read a private key from given engine
*
* @keydir: Key prefix
* @name Name of key
* @engine Engine to use
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
* @evpp Returns EVP_PKEY object, or NULL on failure
doc: replace @return by Return: Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 17:05:50 +00:00
* Return: 0 if ok, -ve on error (in which case *evpp will be set to NULL)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
*/
static int rsa_engine_get_priv_key(const char *keydir, const char *name,
lib/rsa: Use the 'keyfile' argument from mkimage Keys can be derived from keydir, and the "key-name-hint" property of the FIT. They can also be specified ad-literam via 'keyfile'. Update the RSA signing path to use the appropriate one. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 18:45:18 +00:00
const char *keyfile,
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
ENGINE *engine, EVP_PKEY **evpp)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
{
const char *engine_id;
char key_id[1024];
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
EVP_PKEY *key = NULL;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
if (!evpp)
return -EINVAL;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
engine_id = ENGINE_get_id(engine);
if (engine_id && !strcmp(engine_id, "pkcs11")) {
lib/rsa: Use the 'keyfile' argument from mkimage Keys can be derived from keydir, and the "key-name-hint" property of the FIT. They can also be specified ad-literam via 'keyfile'. Update the RSA signing path to use the appropriate one. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 18:45:18 +00:00
if (!keydir && !name) {
fprintf(stderr, "Please use 'keydir' with PKCS11\n");
return -EINVAL;
}
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
if (keydir)
lib: rsa: avoid overriding the object name when already specified If "object=" is specified in "keydir" when using the pkcs11 engine do not append another "object=<key-name-hint>". This makes it possible to use object names other than the key name hint. These two string identifiers are not necessarily equal. Signed-off-by: Jan Luebbe <jlu@pengutronix.de> Signed-off-by: Bastian Krause <bst@pengutronix.de> Reviewed-by: George McCollister <george.mccollister@gmail.com>
2020-05-13 10:26:24 +00:00
if (strstr(keydir, "object="))
snprintf(key_id, sizeof(key_id),
"pkcs11:%s;type=private",
keydir);
else
snprintf(key_id, sizeof(key_id),
"pkcs11:%s;object=%s;type=private",
keydir, name);
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
else
snprintf(key_id, sizeof(key_id),
"pkcs11:object=%s;type=private",
name);
lib: rsa: add support to other openssl engine types than pkcs11 There are multiple other openssl engines used by HSMs that can be used to sign FIT images instead of forcing users to use pkcs11 type of service. Relax engine selection so that other openssl engines can be specified and use generic key id definition formula. Signed-off-by: Vesa Jääskeläinen <vesa.jaaskelainen@vaisala.com> Cc: Tom Rini <trini@konsulko.com>
2019-06-16 17:53:38 +00:00
} else if (engine_id) {
lib/rsa: Use the 'keyfile' argument from mkimage Keys can be derived from keydir, and the "key-name-hint" property of the FIT. They can also be specified ad-literam via 'keyfile'. Update the RSA signing path to use the appropriate one. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 18:45:18 +00:00
if (keydir && name)
lib: rsa: add support to other openssl engine types than pkcs11 There are multiple other openssl engines used by HSMs that can be used to sign FIT images instead of forcing users to use pkcs11 type of service. Relax engine selection so that other openssl engines can be specified and use generic key id definition formula. Signed-off-by: Vesa Jääskeläinen <vesa.jaaskelainen@vaisala.com> Cc: Tom Rini <trini@konsulko.com>
2019-06-16 17:53:38 +00:00
snprintf(key_id, sizeof(key_id),
"%s%s",
keydir, name);
lib/rsa: don't use NULL as key_id If keydir is not provided but name is we want to use name as key_id. But with the current coding name is only used on its own if it is NULL and keydir is provided which never occurs. Fixes: 824ee745fbca ("lib/rsa: Use the 'keyfile' argument from mkimage") Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-08-28 10:13:05 +00:00
else if (name)
lib: rsa: add support to other openssl engine types than pkcs11 There are multiple other openssl engines used by HSMs that can be used to sign FIT images instead of forcing users to use pkcs11 type of service. Relax engine selection so that other openssl engines can be specified and use generic key id definition formula. Signed-off-by: Vesa Jääskeläinen <vesa.jaaskelainen@vaisala.com> Cc: Tom Rini <trini@konsulko.com>
2019-06-16 17:53:38 +00:00
snprintf(key_id, sizeof(key_id),
"%s",
lib: -Wformat-truncation in rsa_engine_get_priv_key With glibc 2.33 (Ubuntu package glibc6 2.33-0ubuntu9) building sifive_unmatched_defconfig results in: In file included from /usr/include/stdio.h:866, from ././include/compiler.h:26, from <command-line>: In function ‘snprintf’, inlined from ‘rsa_engine_get_priv_key’ at ./tools/../^:273:4: /usr/include/riscv64-linux-gnu/bits/stdio2.h:71:10: warning: ‘%s’ directive argument is null [-Wformat-truncation=] 71 | return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 72 | __glibc_objsize (__s), __fmt, | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 73 | __va_arg_pack ()); | ~~~~~~~~~~~~~~~~~ Avoid passing a NULL string. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-07-30 15:05:07 +00:00
name ? name : "");
lib/rsa: Use the 'keyfile' argument from mkimage Keys can be derived from keydir, and the "key-name-hint" property of the FIT. They can also be specified ad-literam via 'keyfile'. Update the RSA signing path to use the appropriate one. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 18:45:18 +00:00
else if (keyfile)
snprintf(key_id, sizeof(key_id), "%s", keyfile);
else
return -EINVAL;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
} else {
fprintf(stderr, "Engine not supported\n");
return -ENOTSUP;
}
key = ENGINE_load_private_key(engine, key_id, NULL, NULL);
if (!key)
return rsa_err("Failure loading private key from engine");
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
*evpp = key;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
return 0;
}
/**
* rsa_get_priv_key() - read a private key
*
* @keydir: Directory containing the key (PEM file) or key prefix (engine)
* @name Name of key
* @engine Engine to use for signing
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
* @evpp Returns EVP_PKEY object, or NULL on failure
doc: replace @return by Return: Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 17:05:50 +00:00
* Return: 0 if ok, -ve on error (in which case *evpp will be set to NULL)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
*/
static int rsa_get_priv_key(const char *keydir, const char *name,
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
const char *keyfile, ENGINE *engine, EVP_PKEY **evpp)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
{
if (engine)
lib/rsa: Use the 'keyfile' argument from mkimage Keys can be derived from keydir, and the "key-name-hint" property of the FIT. They can also be specified ad-literam via 'keyfile'. Update the RSA signing path to use the appropriate one. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 18:45:18 +00:00
return rsa_engine_get_priv_key(keydir, name, keyfile, engine,
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
evpp);
return rsa_pem_get_priv_key(keydir, name, keyfile, evpp);
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
}
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
static int rsa_init(void)
{
int ret;
rsa: Fix build with OpenSSL 1.1.x The rsa_st struct has been made opaque in 1.1.x, add forward compatible code to access the n, e, d members of rsa_struct. EVP_MD_CTX_cleanup has been removed in 1.1.x and EVP_MD_CTX_reset should be called to reinitialise an already created structure.
2017-05-08 19:31:19 +00:00
ret = OPENSSL_init_ssl(0, NULL);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
if (!ret) {
fprintf(stderr, "Failure to init SSL library\n");
return -1;
}
return 0;
}
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
static int rsa_engine_init(const char *engine_id, ENGINE **pe)
{
mkimage: use environment variable MKIMAGE_SIGN_PIN to set pin for OpenSSL Engine This patch adds the possibility to pass the PIN the OpenSSL Engine used during signing via the environment variable MKIMAGE_SIGN_PIN. This follows the approach used during kernel module signing ("KBUILD_SIGN_PIN") or UBIFS image signing ("MKIMAGE_SIGN_PIN"). Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2021-07-23 20:17:50 +00:00
const char *key_pass;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
ENGINE *e;
int ret;
ENGINE_load_builtin_engines();
e = ENGINE_by_id(engine_id);
if (!e) {
fprintf(stderr, "Engine isn't available\n");
lib/rsa: Remove support for OpenSSL < 1.1.0 and libressl < 2.7.0 Older OpenSSL and libressl versions have a slightly different API. This require #ifdefs to support. However, we still can't support it because the ECDSA path does not compile with these older versions. These #ifdefs are truly a vestigial appendage. Alternatively, the ECDSA path could be updated for older libraries, but this requires significant extra code, and #ifdefs. Those libraries are over three years old, and there concerns whether it makes sense to build modern software for real world use against such old libraries. Thusly, remove #ifdefs and code for old OpenSSL and LibreSSL support. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2021-07-29 18:31:21 +00:00
return -1;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
}
if (!ENGINE_init(e)) {
fprintf(stderr, "Couldn't initialize engine\n");
ret = -1;
goto err_engine_init;
}
if (!ENGINE_set_default_RSA(e)) {
fprintf(stderr, "Couldn't set engine as default for RSA\n");
ret = -1;
goto err_set_rsa;
}
mkimage: use environment variable MKIMAGE_SIGN_PIN to set pin for OpenSSL Engine This patch adds the possibility to pass the PIN the OpenSSL Engine used during signing via the environment variable MKIMAGE_SIGN_PIN. This follows the approach used during kernel module signing ("KBUILD_SIGN_PIN") or UBIFS image signing ("MKIMAGE_SIGN_PIN"). Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2021-07-23 20:17:50 +00:00
key_pass = getenv("MKIMAGE_SIGN_PIN");
if (key_pass) {
if (!ENGINE_ctrl_cmd_string(e, "PIN", key_pass, 0)) {
fprintf(stderr, "Couldn't set PIN\n");
ret = -1;
goto err_set_pin;
}
}
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
*pe = e;
return 0;
mkimage: use environment variable MKIMAGE_SIGN_PIN to set pin for OpenSSL Engine This patch adds the possibility to pass the PIN the OpenSSL Engine used during signing via the environment variable MKIMAGE_SIGN_PIN. This follows the approach used during kernel module signing ("KBUILD_SIGN_PIN") or UBIFS image signing ("MKIMAGE_SIGN_PIN"). Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2021-07-23 20:17:50 +00:00
err_set_pin:
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
err_set_rsa:
ENGINE_finish(e);
err_engine_init:
ENGINE_free(e);
return ret;
}
static void rsa_engine_remove(ENGINE *e)
{
if (e) {
ENGINE_finish(e);
ENGINE_free(e);
}
}
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
static int rsa_sign_with_key(EVP_PKEY *pkey, struct padding_algo *padding_algo,
rsa: add a structure for the padding The rsa signature use a padding algorithm. By default, we use the padding pkcs-1.5. In order to add some new padding algorithm, we add a padding framework to manage several padding algorithm. The choice of the padding is done in the file .its. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:51:00 +00:00
struct checksum_algo *checksum_algo,
rsa: add sha256-rsa2048 algorithm based on patch from andreas@oetken.name: http://patchwork.ozlabs.org/patch/294318/ commit message: I currently need support for rsa-sha256 signatures in u-boot and found out that the code for signatures is not very generic. Thus adding of different hash-algorithms for rsa-signatures is not easy to do without copy-pasting the rsa-code. I attached a patch for how I think it could be better and included support for rsa-sha256. This is a fast first shot. aditionally work: - removed checkpatch warnings - removed compiler warnings - rebased against current head Signed-off-by: Heiko Schocher <hs@denx.de> Cc: andreas@oetken.name Cc: Simon Glass <sjg@chromium.org>
2014-03-03 11:19:26 +00:00
const struct image_region region[], int region_count,
uint8_t **sigp, uint *sig_size)
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
{
rsa: add a structure for the padding The rsa signature use a padding algorithm. By default, we use the padding pkcs-1.5. In order to add some new padding algorithm, we add a padding framework to manage several padding algorithm. The choice of the padding is done in the file .its. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:51:00 +00:00
EVP_PKEY_CTX *ckey;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
EVP_MD_CTX *context;
rsa: use new openssl API to create signature Previous implementation of the rsa signature was using the openssl API EVP_Sign*, but the new openssl API EVP_DigestSign* is more flexible. So we move to this new API. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:50:59 +00:00
int ret = 0;
size_t size;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
uint8_t *sig;
int i;
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
size = EVP_PKEY_size(pkey);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
sig = malloc(size);
if (!sig) {
rsa: use new openssl API to create signature Previous implementation of the rsa signature was using the openssl API EVP_Sign*, but the new openssl API EVP_DigestSign* is more flexible. So we move to this new API. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:50:59 +00:00
fprintf(stderr, "Out of memory for signature (%zu bytes)\n",
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
size);
ret = -ENOMEM;
goto err_alloc;
}
lib: rsa: use actual OpenSSL 1.1.0 EVP MD API Since OpenSSL 1.1.0, EVP_MD_CTX_create() is EVP_MD_CTX_new() EVP_MD_CTX_destroy() is EVP_MD_CTX_free() EVP_MD_CTX_init() is EVP_MD_CTX_reset() As there's no need to reset a newly created EVP_MD_CTX, moreover EVP_DigestSignInit() does the reset, thus call to EVP_MD_CTX_init() can be dropped. As there's no need to reset an EVP_MD_CTX before it's destroyed, as it will be reset by EVP_MD_CTX_free(), call to EVP_MD_CTX_reset() is not needed and can be dropped. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
2022-03-01 15:12:34 +00:00
context = EVP_MD_CTX_new();
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
if (!context) {
ret = rsa_err("EVP context creation failed");
goto err_create;
}
rsa: add a structure for the padding The rsa signature use a padding algorithm. By default, we use the padding pkcs-1.5. In order to add some new padding algorithm, we add a padding framework to manage several padding algorithm. The choice of the padding is done in the file .its. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:51:00 +00:00
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
ckey = EVP_PKEY_CTX_new(pkey, NULL);
rsa: add a structure for the padding The rsa signature use a padding algorithm. By default, we use the padding pkcs-1.5. In order to add some new padding algorithm, we add a padding framework to manage several padding algorithm. The choice of the padding is done in the file .its. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:51:00 +00:00
if (!ckey) {
ret = rsa_err("EVP key context creation failed");
goto err_create;
}
if (EVP_DigestSignInit(context, &ckey,
rsa: use new openssl API to create signature Previous implementation of the rsa signature was using the openssl API EVP_Sign*, but the new openssl API EVP_DigestSign* is more flexible. So we move to this new API. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:50:59 +00:00
checksum_algo->calculate_sign(),
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
NULL, pkey) <= 0) {
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
ret = rsa_err("Signer setup failed");
goto err_sign;
}
image: Use Kconfig to enable FIT_RSASSA_PSS on host Add a host Kconfig for FIT_RSASSA_PSS. With this we can use CONFIG_IS_ENABLED(FIT_RSASSA_PSS) directly in the host build, so drop the forcing of this in the image.h header. Drop the #ifdef around padding_pss_verify() too since it is not needed. Use the compiler to check the config where possible, instead of the preprocessor. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2021-09-26 01:43:23 +00:00
if (CONFIG_IS_ENABLED(FIT_RSASSA_PSS) && padding_algo &&
!strcmp(padding_algo->name, "pss")) {
rsa: add support of padding pss We add the support of the padding pss for rsa signature. This new padding is often recommended instead of pkcs-1.5. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:51:01 +00:00
if (EVP_PKEY_CTX_set_rsa_padding(ckey,
RSA_PKCS1_PSS_PADDING) <= 0) {
ret = rsa_err("Signer padding setup failed");
goto err_sign;
}
}
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
for (i = 0; i < region_count; i++) {
rsa: use new openssl API to create signature Previous implementation of the rsa signature was using the openssl API EVP_Sign*, but the new openssl API EVP_DigestSign* is more flexible. So we move to this new API. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:50:59 +00:00
if (!EVP_DigestSignUpdate(context, region[i].data,
region[i].size)) {
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
ret = rsa_err("Signing data failed");
goto err_sign;
}
}
rsa: use new openssl API to create signature Previous implementation of the rsa signature was using the openssl API EVP_Sign*, but the new openssl API EVP_DigestSign* is more flexible. So we move to this new API. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:50:59 +00:00
if (!EVP_DigestSignFinal(context, sig, &size)) {
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
ret = rsa_err("Could not obtain signature");
goto err_sign;
}
rsa: use new openssl API to create signature Previous implementation of the rsa signature was using the openssl API EVP_Sign*, but the new openssl API EVP_DigestSign* is more flexible. So we move to this new API. Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-11-14 12:50:59 +00:00
lib: rsa: use actual OpenSSL 1.1.0 EVP MD API Since OpenSSL 1.1.0, EVP_MD_CTX_create() is EVP_MD_CTX_new() EVP_MD_CTX_destroy() is EVP_MD_CTX_free() EVP_MD_CTX_init() is EVP_MD_CTX_reset() As there's no need to reset a newly created EVP_MD_CTX, moreover EVP_DigestSignInit() does the reset, thus call to EVP_MD_CTX_init() can be dropped. As there's no need to reset an EVP_MD_CTX before it's destroyed, as it will be reset by EVP_MD_CTX_free(), call to EVP_MD_CTX_reset() is not needed and can be dropped. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
2022-03-01 15:12:34 +00:00
EVP_MD_CTX_free(context);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
lib: rsa: rsa-sign: Minor bug in debug message *sig_size isn't set until later so use the correct variables. Signed-off-by: Donald Chan <hoiho@lab126.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-07-19 16:18:54 +00:00
debug("Got signature: %zu bytes, expected %d\n", size, EVP_PKEY_size(pkey));
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
*sigp = sig;
*sig_size = size;
return 0;
err_sign:
lib: rsa: use actual OpenSSL 1.1.0 EVP MD API Since OpenSSL 1.1.0, EVP_MD_CTX_create() is EVP_MD_CTX_new() EVP_MD_CTX_destroy() is EVP_MD_CTX_free() EVP_MD_CTX_init() is EVP_MD_CTX_reset() As there's no need to reset a newly created EVP_MD_CTX, moreover EVP_DigestSignInit() does the reset, thus call to EVP_MD_CTX_init() can be dropped. As there's no need to reset an EVP_MD_CTX before it's destroyed, as it will be reset by EVP_MD_CTX_free(), call to EVP_MD_CTX_reset() is not needed and can be dropped. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
2022-03-01 15:12:34 +00:00
EVP_MD_CTX_free(context);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
err_create:
free(sig);
err_alloc:
return ret;
}
int rsa_sign(struct image_sign_info *info,
const struct image_region region[], int region_count,
uint8_t **sigp, uint *sig_len)
{
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
EVP_PKEY *pkey = NULL;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
ENGINE *e = NULL;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
int ret;
ret = rsa_init();
if (ret)
return ret;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
if (info->engine_id) {
ret = rsa_engine_init(info->engine_id, &e);
if (ret)
lib/rsa: Remove support for OpenSSL < 1.1.0 and libressl < 2.7.0 Older OpenSSL and libressl versions have a slightly different API. This require #ifdefs to support. However, we still can't support it because the ECDSA path does not compile with these older versions. These #ifdefs are truly a vestigial appendage. Alternatively, the ECDSA path could be updated for older libraries, but this requires significant extra code, and #ifdefs. Those libraries are over three years old, and there concerns whether it makes sense to build modern software for real world use against such old libraries. Thusly, remove #ifdefs and code for old OpenSSL and LibreSSL support. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2021-07-29 18:31:21 +00:00
return ret;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
}
lib/rsa: Use the 'keyfile' argument from mkimage Keys can be derived from keydir, and the "key-name-hint" property of the FIT. They can also be specified ad-literam via 'keyfile'. Update the RSA signing path to use the appropriate one. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-19 18:45:18 +00:00
ret = rsa_get_priv_key(info->keydir, info->keyname, info->keyfile,
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
e, &pkey);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
if (ret)
goto err_priv;
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
ret = rsa_sign_with_key(pkey, info->padding, info->checksum, region,
rsa: add sha256-rsa2048 algorithm based on patch from andreas@oetken.name: http://patchwork.ozlabs.org/patch/294318/ commit message: I currently need support for rsa-sha256 signatures in u-boot and found out that the code for signatures is not very generic. Thus adding of different hash-algorithms for rsa-signatures is not easy to do without copy-pasting the rsa-code. I attached a patch for how I think it could be better and included support for rsa-sha256. This is a fast first shot. aditionally work: - removed checkpatch warnings - removed compiler warnings - rebased against current head Signed-off-by: Heiko Schocher <hs@denx.de> Cc: andreas@oetken.name Cc: Simon Glass <sjg@chromium.org>
2014-03-03 11:19:26 +00:00
region_count, sigp, sig_len);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
if (ret)
goto err_sign;
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
EVP_PKEY_free(pkey);
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
if (info->engine_id)
rsa_engine_remove(e);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
return ret;
err_sign:
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
EVP_PKEY_free(pkey);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
err_priv:
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
if (info->engine_id)
rsa_engine_remove(e);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
return ret;
}
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
/*
* rsa_get_exponent(): - Get the public exponent from an RSA key
*/
static int rsa_get_exponent(RSA *key, uint64_t *e)
{
int ret;
BIGNUM *bn_te;
rsa: Fix build with OpenSSL 1.1.x The rsa_st struct has been made opaque in 1.1.x, add forward compatible code to access the n, e, d members of rsa_struct. EVP_MD_CTX_cleanup has been removed in 1.1.x and EVP_MD_CTX_reset should be called to reinitialise an already created structure.
2017-05-08 19:31:19 +00:00
const BIGNUM *key_e;
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
uint64_t te;
ret = -EINVAL;
bn_te = NULL;
if (!e)
goto cleanup;
rsa: Fix build with OpenSSL 1.1.x The rsa_st struct has been made opaque in 1.1.x, add forward compatible code to access the n, e, d members of rsa_struct. EVP_MD_CTX_cleanup has been removed in 1.1.x and EVP_MD_CTX_reset should be called to reinitialise an already created structure.
2017-05-08 19:31:19 +00:00
RSA_get0_key(key, NULL, &key_e, NULL);
if (BN_num_bits(key_e) > 64)
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
goto cleanup;
rsa: Fix build with OpenSSL 1.1.x The rsa_st struct has been made opaque in 1.1.x, add forward compatible code to access the n, e, d members of rsa_struct. EVP_MD_CTX_cleanup has been removed in 1.1.x and EVP_MD_CTX_reset should be called to reinitialise an already created structure.
2017-05-08 19:31:19 +00:00
*e = BN_get_word(key_e);
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
rsa: Fix build with OpenSSL 1.1.x The rsa_st struct has been made opaque in 1.1.x, add forward compatible code to access the n, e, d members of rsa_struct. EVP_MD_CTX_cleanup has been removed in 1.1.x and EVP_MD_CTX_reset should be called to reinitialise an already created structure.
2017-05-08 19:31:19 +00:00
if (BN_num_bits(key_e) < 33) {
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
ret = 0;
goto cleanup;
}
rsa: Fix build with OpenSSL 1.1.x The rsa_st struct has been made opaque in 1.1.x, add forward compatible code to access the n, e, d members of rsa_struct. EVP_MD_CTX_cleanup has been removed in 1.1.x and EVP_MD_CTX_reset should be called to reinitialise an already created structure.
2017-05-08 19:31:19 +00:00
bn_te = BN_dup(key_e);
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
if (!bn_te)
goto cleanup;
if (!BN_rshift(bn_te, bn_te, 32))
goto cleanup;
if (!BN_mask_bits(bn_te, 32))
goto cleanup;
te = BN_get_word(bn_te);
te <<= 32;
*e |= te;
ret = 0;
cleanup:
if (bn_te)
BN_free(bn_te);
return ret;
}
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
/*
* rsa_get_params(): - Get the important parameters of an RSA public key
*/
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
int rsa_get_params(RSA *key, uint64_t *exponent, uint32_t *n0_invp,
BIGNUM **modulusp, BIGNUM **r_squaredp)
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
{
BIGNUM *big1, *big2, *big32, *big2_32;
BIGNUM *n, *r, *r_squared, *tmp;
rsa: Fix build with OpenSSL 1.1.x The rsa_st struct has been made opaque in 1.1.x, add forward compatible code to access the n, e, d members of rsa_struct. EVP_MD_CTX_cleanup has been removed in 1.1.x and EVP_MD_CTX_reset should be called to reinitialise an already created structure.
2017-05-08 19:31:19 +00:00
const BIGNUM *key_n;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
BN_CTX *bn_ctx = BN_CTX_new();
int ret = 0;
/* Initialize BIGNUMs */
big1 = BN_new();
big2 = BN_new();
big32 = BN_new();
r = BN_new();
r_squared = BN_new();
tmp = BN_new();
big2_32 = BN_new();
n = BN_new();
if (!big1 || !big2 || !big32 || !r || !r_squared || !tmp || !big2_32 ||
!n) {
fprintf(stderr, "Out of memory (bignum)\n");
return -ENOMEM;
}
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
if (0 != rsa_get_exponent(key, exponent))
ret = -1;
rsa: Fix build with OpenSSL 1.1.x The rsa_st struct has been made opaque in 1.1.x, add forward compatible code to access the n, e, d members of rsa_struct. EVP_MD_CTX_cleanup has been removed in 1.1.x and EVP_MD_CTX_reset should be called to reinitialise an already created structure.
2017-05-08 19:31:19 +00:00
RSA_get0_key(key, &key_n, NULL, NULL);
if (!BN_copy(n, key_n) || !BN_set_word(big1, 1L) ||
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
!BN_set_word(big2, 2L) || !BN_set_word(big32, 32L))
ret = -1;
/* big2_32 = 2^32 */
if (!BN_exp(big2_32, big2, big32, bn_ctx))
ret = -1;
/* Calculate n0_inv = -1 / n[0] mod 2^32 */
if (!BN_mod_inverse(tmp, n, big2_32, bn_ctx) ||
!BN_sub(tmp, big2_32, tmp))
ret = -1;
*n0_invp = BN_get_word(tmp);
/* Calculate R = 2^(# of key bits) */
if (!BN_set_word(tmp, BN_num_bits(n)) ||
!BN_exp(r, big2, tmp, bn_ctx))
ret = -1;
/* Calculate r_squared = R^2 mod n */
if (!BN_copy(r_squared, r) ||
!BN_mul(tmp, r_squared, r, bn_ctx) ||
!BN_mod(r_squared, tmp, n, bn_ctx))
ret = -1;
*modulusp = n;
*r_squaredp = r_squared;
BN_free(big1);
BN_free(big2);
BN_free(big32);
BN_free(r);
BN_free(tmp);
BN_free(big2_32);
if (ret) {
fprintf(stderr, "Bignum operations failed\n");
return -ENOMEM;
}
return ret;
}
int rsa_add_verify_data(struct image_sign_info *info, void *keydest)
{
BIGNUM *modulus, *r_squared;
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
uint64_t exponent;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
uint32_t n0_inv;
lib: rsa: cosmetic: fix building warning add initialization of variable 'node',this can aviod the building warning: 'node' may be used uninitialized [-Wmaybe-uninitialized] Signed-off-by: Haijun Qin <qinhaijun@eswincomputing.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2022-12-06 07:41:37 +00:00
int parent, node = -FDT_ERR_NOTFOUND;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
char name[100];
int ret;
int bits;
RSA *rsa;
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
EVP_PKEY *pkey = NULL;
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
ENGINE *e = NULL;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
debug("%s: Getting verification data\n", __func__);
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
if (info->engine_id) {
ret = rsa_engine_init(info->engine_id, &e);
if (ret)
return ret;
}
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
ret = rsa_get_pub_key(info->keydir, info->keyname, e, &pkey);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
if (ret)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
goto err_get_pub_key;
lib/rsa: Remove support for OpenSSL < 1.1.0 and libressl < 2.7.0 Older OpenSSL and libressl versions have a slightly different API. This require #ifdefs to support. However, we still can't support it because the ECDSA path does not compile with these older versions. These #ifdefs are truly a vestigial appendage. Alternatively, the ECDSA path could be updated for older libraries, but this requires significant extra code, and #ifdefs. Those libraries are over three years old, and there concerns whether it makes sense to build modern software for real world use against such old libraries. Thusly, remove #ifdefs and code for old OpenSSL and LibreSSL support. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2021-07-29 18:31:21 +00:00
lib/rsa: avoid -Wdiscarded-qualifiers The return type of EVP_PKEY_get0_RSA() is const struct rsa_st *. Our code drops the const qualifier leading to In file included from tools/lib/rsa/rsa-sign.c:1: ./tools/../lib/rsa/rsa-sign.c: In function ‘rsa_add_verify_data’: ./tools/../lib/rsa/rsa-sign.c:631:13: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers] 631 | rsa = EVP_PKEY_get0_RSA(pkey); | ^ Add a type conversion. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-09 14:39:40 +00:00
rsa = (RSA *)EVP_PKEY_get0_RSA(pkey);
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
ret = rsa_get_params(rsa, &exponent, &n0_inv, &modulus, &r_squared);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
if (ret)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
goto err_get_params;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
bits = BN_num_bits(modulus);
parent = fdt_subnode_offset(keydest, 0, FIT_SIG_NODENAME);
if (parent == -FDT_ERR_NOTFOUND) {
parent = fdt_add_subnode(keydest, 0, FIT_SIG_NODENAME);
if (parent < 0) {
mkimage: Automatically expand FDT in more cases The original code did not cover every case and there was a missing negative sign in one case. Expand the coverage and fix the bug. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-12 13:24:42 +00:00
ret = parent;
if (ret != -FDT_ERR_NOSPACE) {
fprintf(stderr, "Couldn't create signature node: %s\n",
fdt_strerror(parent));
}
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
}
}
mkimage: Automatically expand FDT in more cases The original code did not cover every case and there was a missing negative sign in one case. Expand the coverage and fix the bug. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-12 13:24:42 +00:00
if (ret)
goto done;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
/* Either create or overwrite the named key node */
snprintf(name, sizeof(name), "key-%s", info->keyname);
node = fdt_subnode_offset(keydest, parent, name);
if (node == -FDT_ERR_NOTFOUND) {
node = fdt_add_subnode(keydest, parent, name);
if (node < 0) {
mkimage: Automatically expand FDT in more cases The original code did not cover every case and there was a missing negative sign in one case. Expand the coverage and fix the bug. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-12 13:24:42 +00:00
ret = node;
if (ret != -FDT_ERR_NOSPACE) {
fprintf(stderr, "Could not create key subnode: %s\n",
fdt_strerror(node));
}
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
}
} else if (node < 0) {
fprintf(stderr, "Cannot select keys parent: %s\n",
fdt_strerror(node));
mkimage: Automatically expand FDT in more cases The original code did not cover every case and there was a missing negative sign in one case. Expand the coverage and fix the bug. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-12 13:24:42 +00:00
ret = node;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
}
mkimage: Automatically expand FDT in more cases The original code did not cover every case and there was a missing negative sign in one case. Expand the coverage and fix the bug. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-12 13:24:42 +00:00
if (!ret) {
image: Use constants for 'required' and 'key-name-hint' These are used in multiple places so update them to use a shared #define. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Philippe Reynes <philippe.reynes@softathome.com>
2020-03-18 17:44:06 +00:00
ret = fdt_setprop_string(keydest, node, FIT_KEY_HINT,
info->keyname);
mkimage: Automatically expand FDT in more cases The original code did not cover every case and there was a missing negative sign in one case. Expand the coverage and fix the bug. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-12 13:24:42 +00:00
}
fdt: Update functions which write to an FDT to return -ENOSPC When writing values into an FDT it is possible that there will be insufficient space. If the caller gets a useful error then it can potentially deal with the situation. Adjust these functions to return -ENOSPC when the FDT is full. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-03 04:04:51 +00:00
if (!ret)
ret = fdt_setprop_u32(keydest, node, "rsa,num-bits", bits);
if (!ret)
ret = fdt_setprop_u32(keydest, node, "rsa,n0-inverse", n0_inv);
Implement generalised RSA public exponents for verified boot Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
2014-07-02 08:17:26 +00:00
if (!ret) {
ret = fdt_setprop_u64(keydest, node, "rsa,exponent", exponent);
}
fdt: Update functions which write to an FDT to return -ENOSPC When writing values into an FDT it is possible that there will be insufficient space. If the caller gets a useful error then it can potentially deal with the situation. Adjust these functions to return -ENOSPC when the FDT is full. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-03 04:04:51 +00:00
if (!ret) {
ret = fdt_add_bignum(keydest, node, "rsa,modulus", modulus,
bits);
}
if (!ret) {
ret = fdt_add_bignum(keydest, node, "rsa,r-squared", r_squared,
bits);
}
if (!ret) {
ret = fdt_setprop_string(keydest, node, FIT_ALGO_PROP,
image: Combine image_sig_algo with image_sign_info Remove the need to explicitly add SHA/RSA pairings. Invalid SHA/RSA pairings will still fail on verify operations when the hash length is longer than the key length. Follow the same naming scheme "checksum,crytpo" without explicitly defining the string. Indirectly adds support for "sha1,rsa4096" signing/verification. Signed-off-by: Andrew Duda <aduda@meraki.com> Signed-off-by: aduda <aduda@meraki.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-11-08 18:53:41 +00:00
info->name);
fdt: Update functions which write to an FDT to return -ENOSPC When writing values into an FDT it is possible that there will be insufficient space. If the caller gets a useful error then it can potentially deal with the situation. Adjust these functions to return -ENOSPC when the FDT is full. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-03 04:04:51 +00:00
}
rsa: Fix return value and masked error When signing images, we repeatedly call fit_add_file_data() with successively increasing size values to include the keys in the DTB. Unfortunately, if large keys are used (such as 4096 bit RSA keys), this process fails sometimes, and mkimage needs to be called repeatedly to integrate the keys into the DTB. This is because fit_add_file_data actually returns the wrong error code, and the loop terminates prematurely, instead of trying again with a larger size value. This patch corrects the return value by fixing the return value of fdt_add_bignum, fixes a case where an error is masked by a unconditional setting of a return value variable, and also removes a error message, which is misleading, since we actually allow the function to fail. A (hopefully helpful) comment is also added to explain the lack of error message. This is probably related to 1152a05 ("tools: Correct error handling in fit_image_process_hash()") and the corresponding error reported here: https://www.mail-archive.com/u-boot@lists.denx.de/msg217417.html Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-07-19 09:07:07 +00:00
if (!ret && info->require_keys) {
image: Use constants for 'required' and 'key-name-hint' These are used in multiple places so update them to use a shared #define. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Philippe Reynes <philippe.reynes@softathome.com>
2020-03-18 17:44:06 +00:00
ret = fdt_setprop_string(keydest, node, FIT_KEY_REQUIRED,
fdt: Update functions which write to an FDT to return -ENOSPC When writing values into an FDT it is possible that there will be insufficient space. If the caller gets a useful error then it can potentially deal with the situation. Adjust these functions to return -ENOSPC when the FDT is full. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-03 04:04:51 +00:00
info->require_keys);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
}
mkimage: Automatically expand FDT in more cases The original code did not cover every case and there was a missing negative sign in one case. Expand the coverage and fix the bug. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-12 13:24:42 +00:00
done:
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
BN_free(modulus);
BN_free(r_squared);
if (ret)
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
ret = ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
err_get_params:
lib/rsa: Use EVP_PKEY instead of RSA Most modern OpenSSL engines have methods overridden at the EVP level rather than at RSA level, to make these engines work properly with mkimage, the RSA signing code needs to switch to using EVP_* APIs as much as possible. Signed-off-by: Donald Chan <hoiho@lab126.com> [trini: Rebase on top of keyfile changes] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-04-01 22:42:36 +00:00
EVP_PKEY_free(pkey);
mkimage: Add support for signing with pkcs11 Add support for signing with the pkcs11 engine. This allows FIT images to be signed with keys securely stored on a smartcard, hardware security module, etc without exposing the keys. Support for other engines can be added in the future by modifying rsa_engine_get_pub_key() and rsa_engine_get_priv_key() to construct correct key_id strings. Signed-off-by: George McCollister <george.mccollister@gmail.com>
2017-01-06 19:14:17 +00:00
err_get_pub_key:
if (info->engine_id)
rsa_engine_remove(e);
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
image: Return destination node for add_verify_data() method It is useful to know where the verification data was written. Update the API to return this. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-11-12 19:28:11 +00:00
if (ret)
return ret;
return node;
image: Add RSA support for image signing RSA provides a public key encryption facility which is ideal for image signing and verification. Images are signed using a private key by mkimage. Then at run-time, the images are verified using a private key. This implementation uses openssl for the host part (mkimage). To avoid bringing large libraries into the U-Boot binary, the RSA public key is encoded using a simple numeric representation in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-13 22:10:02 +00:00
}
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