mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 22:20:45 +00:00
db1b5f3d20
Add support for sha256,rsa4096 signatures in u-boot. Signed-off-by: Heiko Schocher <hs@denx.de> Acked-by: Simon Glass <sjg@chromium.org> Cc: andreas@oetken.name
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2013, Google Inc.
|
|
*
|
|
* (C) Copyright 2008 Semihalf
|
|
*
|
|
* (C) Copyright 2000-2006
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _RSA_H
|
|
#define _RSA_H
|
|
|
|
#include <errno.h>
|
|
#include <image.h>
|
|
|
|
/**
|
|
* struct rsa_public_key - holder for a public key
|
|
*
|
|
* An RSA public key consists of a modulus (typically called N), the inverse
|
|
* and R^2, where R is 2^(# key bits).
|
|
*/
|
|
|
|
struct rsa_public_key {
|
|
uint len; /* len of modulus[] in number of uint32_t */
|
|
uint32_t n0inv; /* -1 / modulus[0] mod 2^32 */
|
|
uint32_t *modulus; /* modulus as little endian array */
|
|
uint32_t *rr; /* R^2 as little endian array */
|
|
};
|
|
|
|
#if IMAGE_ENABLE_SIGN
|
|
/**
|
|
* sign() - calculate and return signature for given input data
|
|
*
|
|
* @info: Specifies key and FIT information
|
|
* @data: Pointer to the input data
|
|
* @data_len: Data length
|
|
* @sigp: Set to an allocated buffer holding the signature
|
|
* @sig_len: Set to length of the calculated hash
|
|
*
|
|
* This computes input data signature according to selected algorithm.
|
|
* Resulting signature value is placed in an allocated buffer, the
|
|
* pointer is returned as *sigp. The length of the calculated
|
|
* signature is returned via the sig_len pointer argument. The caller
|
|
* should free *sigp.
|
|
*
|
|
* @return: 0, on success, -ve on error
|
|
*/
|
|
int rsa_sign(struct image_sign_info *info,
|
|
const struct image_region region[],
|
|
int region_count, uint8_t **sigp, uint *sig_len);
|
|
|
|
/**
|
|
* add_verify_data() - Add verification information to FDT
|
|
*
|
|
* Add public key information to the FDT node, suitable for
|
|
* verification at run-time. The information added depends on the
|
|
* algorithm being used.
|
|
*
|
|
* @info: Specifies key and FIT information
|
|
* @keydest: Destination FDT blob for public key data
|
|
* @return: 0, on success, -ve on error
|
|
*/
|
|
int rsa_add_verify_data(struct image_sign_info *info, void *keydest);
|
|
#else
|
|
static inline int rsa_sign(struct image_sign_info *info,
|
|
const struct image_region region[], int region_count,
|
|
uint8_t **sigp, uint *sig_len)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
|
|
static inline int rsa_add_verify_data(struct image_sign_info *info,
|
|
void *keydest)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
#endif
|
|
|
|
#if IMAGE_ENABLE_VERIFY
|
|
/**
|
|
* rsa_verify() - Verify a signature against some data
|
|
*
|
|
* Verify a RSA PKCS1.5 signature against an expected hash.
|
|
*
|
|
* @info: Specifies key and FIT information
|
|
* @data: Pointer to the input data
|
|
* @data_len: Data length
|
|
* @sig: Signature
|
|
* @sig_len: Number of bytes in signature
|
|
* @return 0 if verified, -ve on error
|
|
*/
|
|
int rsa_verify(struct image_sign_info *info,
|
|
const struct image_region region[], int region_count,
|
|
uint8_t *sig, uint sig_len);
|
|
#else
|
|
static inline int rsa_verify(struct image_sign_info *info,
|
|
const struct image_region region[], int region_count,
|
|
uint8_t *sig, uint sig_len)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
#endif
|
|
|
|
#define RSA2048_BYTES (2048 / 8)
|
|
#define RSA4096_BYTES (4096 / 8)
|
|
|
|
/* This is the minimum/maximum key size we support, in bits */
|
|
#define RSA_MIN_KEY_BITS 2048
|
|
#define RSA_MAX_KEY_BITS 4096
|
|
|
|
/* This is the maximum signature length that we support, in bits */
|
|
#define RSA_MAX_SIG_BITS 4096
|
|
|
|
#endif
|