214 lines
4.2 KiB
C
214 lines
4.2 KiB
C
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Utility functions for message digest functions.
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*/
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#include "2common.h"
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#include "2sha.h"
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#include "2sysincludes.h"
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#if VB2_SUPPORT_SHA1
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#define CTH_SHA1 VB2_HASH_SHA1
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#else
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#define CTH_SHA1 VB2_HASH_INVALID
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#endif
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#if VB2_SUPPORT_SHA256
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#define CTH_SHA256 VB2_HASH_SHA256
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#else
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#define CTH_SHA256 VB2_HASH_INVALID
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#endif
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#if VB2_SUPPORT_SHA512
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#define CTH_SHA512 VB2_HASH_SHA512
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#else
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#define CTH_SHA512 VB2_HASH_INVALID
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#endif
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static const uint8_t crypto_to_hash[] = {
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CTH_SHA1,
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CTH_SHA256,
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CTH_SHA512,
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CTH_SHA1,
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CTH_SHA256,
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CTH_SHA512,
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CTH_SHA1,
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CTH_SHA256,
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CTH_SHA512,
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CTH_SHA1,
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CTH_SHA256,
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CTH_SHA512,
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CTH_SHA1,
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CTH_SHA256,
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CTH_SHA512,
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CTH_SHA1,
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CTH_SHA256,
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CTH_SHA512,
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};
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enum vb2_hash_algorithm vb2_crypto_to_hash(uint32_t algorithm)
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{
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if (algorithm < ARRAY_SIZE(crypto_to_hash))
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return crypto_to_hash[algorithm];
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else
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return VB2_HASH_INVALID;
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}
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vb2_error_t vb2_digest_size(enum vb2_hash_algorithm hash_alg)
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{
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switch (hash_alg) {
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#if VB2_SUPPORT_SHA1
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case VB2_HASH_SHA1:
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return VB2_SHA1_DIGEST_SIZE;
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#endif
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#if VB2_SUPPORT_SHA256
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case VB2_HASH_SHA256:
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return VB2_SHA256_DIGEST_SIZE;
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#endif
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#if VB2_SUPPORT_SHA512
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case VB2_HASH_SHA512:
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return VB2_SHA512_DIGEST_SIZE;
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#endif
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default:
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return 0;
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}
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}
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vb2_error_t vb2_hash_block_size(enum vb2_hash_algorithm alg)
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{
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switch (alg) {
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#if VB2_SUPPORT_SHA1
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case VB2_HASH_SHA1:
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return VB2_SHA1_BLOCK_SIZE;
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#endif
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#if VB2_SUPPORT_SHA256
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case VB2_HASH_SHA256:
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return VB2_SHA256_BLOCK_SIZE;
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#endif
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#if VB2_SUPPORT_SHA512
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case VB2_HASH_SHA512:
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return VB2_SHA512_BLOCK_SIZE;
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#endif
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default:
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return 0;
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}
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}
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const char *vb2_get_hash_algorithm_name(enum vb2_hash_algorithm alg)
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{
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switch (alg) {
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#if VB2_SUPPORT_SHA1
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case VB2_HASH_SHA1:
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return VB2_SHA1_ALG_NAME;
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#endif
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#if VB2_SUPPORT_SHA256
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case VB2_HASH_SHA256:
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return VB2_SHA256_ALG_NAME;
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#endif
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#if VB2_SUPPORT_SHA512
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case VB2_HASH_SHA512:
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return VB2_SHA512_ALG_NAME;
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#endif
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default:
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return VB2_INVALID_ALG_NAME;
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}
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}
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vb2_error_t vb2_digest_init(struct vb2_digest_context *dc,
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enum vb2_hash_algorithm hash_alg)
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{
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dc->hash_alg = hash_alg;
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dc->using_hwcrypto = 0;
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switch (dc->hash_alg) {
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#if VB2_SUPPORT_SHA1
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case VB2_HASH_SHA1:
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vb2_sha1_init(&dc->sha1);
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return VB2_SUCCESS;
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#endif
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#if VB2_SUPPORT_SHA256
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case VB2_HASH_SHA256:
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vb2_sha256_init(&dc->sha256);
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return VB2_SUCCESS;
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#endif
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#if VB2_SUPPORT_SHA512
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case VB2_HASH_SHA512:
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vb2_sha512_init(&dc->sha512);
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return VB2_SUCCESS;
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#endif
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default:
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return VB2_ERROR_SHA_INIT_ALGORITHM;
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}
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}
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vb2_error_t vb2_digest_extend(struct vb2_digest_context *dc, const uint8_t *buf,
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uint32_t size)
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{
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switch (dc->hash_alg) {
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#if VB2_SUPPORT_SHA1
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case VB2_HASH_SHA1:
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vb2_sha1_update(&dc->sha1, buf, size);
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return VB2_SUCCESS;
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#endif
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#if VB2_SUPPORT_SHA256
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case VB2_HASH_SHA256:
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vb2_sha256_update(&dc->sha256, buf, size);
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return VB2_SUCCESS;
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#endif
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#if VB2_SUPPORT_SHA512
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case VB2_HASH_SHA512:
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vb2_sha512_update(&dc->sha512, buf, size);
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return VB2_SUCCESS;
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#endif
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default:
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return VB2_ERROR_SHA_EXTEND_ALGORITHM;
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}
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}
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vb2_error_t vb2_digest_finalize(struct vb2_digest_context *dc, uint8_t *digest,
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uint32_t digest_size)
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{
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if (digest_size < vb2_digest_size(dc->hash_alg))
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return VB2_ERROR_SHA_FINALIZE_DIGEST_SIZE;
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switch (dc->hash_alg) {
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#if VB2_SUPPORT_SHA1
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case VB2_HASH_SHA1:
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vb2_sha1_finalize(&dc->sha1, digest);
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return VB2_SUCCESS;
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#endif
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#if VB2_SUPPORT_SHA256
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case VB2_HASH_SHA256:
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vb2_sha256_finalize(&dc->sha256, digest);
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return VB2_SUCCESS;
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#endif
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#if VB2_SUPPORT_SHA512
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case VB2_HASH_SHA512:
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vb2_sha512_finalize(&dc->sha512, digest);
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return VB2_SUCCESS;
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#endif
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default:
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return VB2_ERROR_SHA_FINALIZE_ALGORITHM;
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}
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}
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vb2_error_t vb2_digest_buffer(const uint8_t *buf, uint32_t size,
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enum vb2_hash_algorithm hash_alg, uint8_t *digest,
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uint32_t digest_size)
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{
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struct vb2_digest_context dc;
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vb2_error_t rv;
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rv = vb2_digest_init(&dc, hash_alg);
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if (rv)
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return rv;
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rv = vb2_digest_extend(&dc, buf, size);
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if (rv)
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return rv;
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return vb2_digest_finalize(&dc, digest, digest_size);
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}
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