diff options
Diffstat (limited to 'firmware/2lib/2sha_utility.c')
| -rw-r--r-- | firmware/2lib/2sha_utility.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/firmware/2lib/2sha_utility.c b/firmware/2lib/2sha_utility.c index a267edde..8c6f4b80 100644 --- a/firmware/2lib/2sha_utility.c +++ b/firmware/2lib/2sha_utility.c @@ -56,7 +56,7 @@ enum vb2_hash_algorithm vb2_crypto_to_hash(uint32_t algorithm) return VB2_HASH_INVALID; } -vb2_error_t vb2_digest_size(enum vb2_hash_algorithm hash_alg) +size_t vb2_digest_size(enum vb2_hash_algorithm hash_alg) { switch (hash_alg) { #if VB2_SUPPORT_SHA1 @@ -76,7 +76,7 @@ vb2_error_t vb2_digest_size(enum vb2_hash_algorithm hash_alg) } } -vb2_error_t vb2_hash_block_size(enum vb2_hash_algorithm alg) +size_t vb2_hash_block_size(enum vb2_hash_algorithm alg) { switch (alg) { #if VB2_SUPPORT_SHA1 @@ -211,3 +211,18 @@ vb2_error_t vb2_digest_buffer(const uint8_t *buf, uint32_t size, return vb2_digest_finalize(&dc, digest, digest_size); } + +vb2_error_t vb2_hash_verify(const void *buf, uint32_t size, + const struct vb2_hash *hash) +{ + uint8_t hash_buf[VB2_MAX_DIGEST_SIZE]; + size_t hash_size = vb2_digest_size(hash->algo); + vb2_error_t rv = vb2_digest_buffer(buf, size, hash->algo, + hash_buf, hash_size); + if (rv) + return rv; + if (memcmp(hash_buf, hash->bytes.raw, hash_size)) + return VB2_ERROR_SHA_MISMATCH; + else + return VB2_SUCCESS; +} |