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c47bbf9a57
Previous patch has introduced MbedTLS porting layer for PKCS7 parser, here to adjust the header and makefiles accordingly. Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
126 lines
4.1 KiB
C
126 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* PKCS#7 crypto data parser internal definitions
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*
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* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#ifndef _PKCS7_PARSER_H
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#define _PKCS7_PARSER_H
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#include <linux/oid_registry.h>
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#include <crypto/pkcs7.h>
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#include <crypto/x509_parser.h>
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#if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509)
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#include <mbedtls/pkcs7.h>
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#include <library/x509_internal.h>
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#include <mbedtls/asn1.h>
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#include <mbedtls/oid.h>
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#endif
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#include <linux/printk.h>
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#define kenter(FMT, ...) \
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pr_devel("==> %s("FMT")\n", __func__, ##__VA_ARGS__)
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#define kleave(FMT, ...) \
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pr_devel("<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
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/* Backup the parsed MedTLS context that we need */
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#if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509)
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struct pkcs7_mbedtls_ctx {
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void *content_data;
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};
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struct pkcs7_sinfo_mbedtls_ctx {
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void *authattrs_data;
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void *content_data_digest;
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};
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#endif
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/*
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* MbedTLS integration Notes:
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*
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* MbedTLS PKCS#7 library does not originally support parsing MicroSoft
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* Authentication Code which is used for verifying the PE image digest.
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*
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* 1. Authenticated Attributes (authenticatedAttributes)
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* MbedTLS assumes unauthenticatedAttributes and authenticatedAttributes
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* fields not exist.
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* See MbedTLS function 'pkcs7_get_signer_info' for details.
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*
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* 2. MicroSoft Authentication Code (mscode)
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* MbedTLS only supports Content Data type defined as 1.2.840.113549.1.7.1
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* (MBEDTLS_OID_PKCS7_DATA, aka OID_data).
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* 1.3.6.1.4.1.311.2.1.4 (MicroSoft Authentication Code, aka
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* OID_msIndirectData) is not supported.
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* See MbedTLS function 'pkcs7_get_content_info_type' for details.
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*
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* But the EFI loader assumes that a PKCS#7 message with an EFI image always
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* contains MicroSoft Authentication Code as Content Data (msg->data is NOT
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* NULL), see function 'efi_signature_verify'.
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*
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* MbedTLS patch "0002-support-MicroSoft-authentication-code-in-PKCS7-lib.patch"
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* is to support both above features by parsing the Content Data and
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* Authenticate Attributes from a given PKCS#7 message.
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*
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* Other fields we don't need to populate from MbedTLS, which are used
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* internally by pkcs7_verify:
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* 'signer', 'unsupported_crypto', 'blacklisted'
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* 'sig->digest' is used internally by pkcs7_digest to calculate the hash of
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* Content Data or Authenticate Attributes.
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*/
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struct pkcs7_signed_info {
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#if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509)
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struct pkcs7_sinfo_mbedtls_ctx *mbedtls_ctx;
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#endif
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struct pkcs7_signed_info *next;
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struct x509_certificate *signer; /* Signing certificate (in msg->certs) */
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unsigned index;
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bool unsupported_crypto; /* T if not usable due to missing crypto */
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bool blacklisted;
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/* Message digest - the digest of the Content Data (or NULL) */
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const void *msgdigest;
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unsigned msgdigest_len;
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/* Authenticated Attribute data (or NULL) */
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unsigned authattrs_len;
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const void *authattrs;
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unsigned long aa_set;
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#define sinfo_has_content_type 0
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#define sinfo_has_signing_time 1
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#define sinfo_has_message_digest 2
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#define sinfo_has_smime_caps 3
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#define sinfo_has_ms_opus_info 4
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#define sinfo_has_ms_statement_type 5
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time64_t signing_time;
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/* Message signature.
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*
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* This contains the generated digest of _either_ the Content Data or
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* the Authenticated Attributes [RFC2315 9.3]. If the latter, one of
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* the attributes contains the digest of the the Content Data within
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* it.
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*
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* THis also contains the issuing cert serial number and issuer's name
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* [PKCS#7 or CMS ver 1] or issuing cert's SKID [CMS ver 3].
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*/
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struct public_key_signature *sig;
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};
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struct pkcs7_message {
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#if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509)
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struct pkcs7_mbedtls_ctx *mbedtls_ctx;
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#endif
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struct x509_certificate *certs; /* Certificate list */
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struct x509_certificate *crl; /* Revocation list */
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struct pkcs7_signed_info *signed_infos;
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u8 version; /* Version of cert (1 -> PKCS#7 or CMS; 3 -> CMS) */
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bool have_authattrs; /* T if have authattrs */
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/* Content Data (or NULL) */
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enum OID data_type; /* Type of Data */
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size_t data_len; /* Length of Data */
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size_t data_hdrlen; /* Length of Data ASN.1 header */
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const void *data; /* Content Data (or 0) */
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};
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#endif /* _PKCS7_PARSER_H */
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