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OpenSSL: Implement SHA256 HMAC functions using HMAC API

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Use the OpenSSL HMAC implementation instead of the internal sha256.c
implementation of HMAC with SHA256.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-08-16 22:34:35 +03:00
parent ab637dcb37
commit 26a379224c
7 changed files with 70 additions and 15 deletions
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43
src/crypto/crypto_openssl.c
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@ -744,6 +744,49 @@ int hmac_sha1(const u8 *key, size_t key_len, const u8 *data, size_t data_len,
}
#ifdef CONFIG_SHA256
int hmac_sha256_vector(const u8 *key, size_t key_len, size_t num_elem,
const u8 *addr[], const size_t *len, u8 *mac)
{
HMAC_CTX ctx;
size_t i;
unsigned int mdlen;
int res;
HMAC_CTX_init(&ctx);
#if OPENSSL_VERSION_NUMBER < 0x00909000
HMAC_Init_ex(&ctx, key, key_len, EVP_sha256(), NULL);
#else /* openssl < 0.9.9 */
if (HMAC_Init_ex(&ctx, key, key_len, EVP_sha256(), NULL) != 1)
return -1;
#endif /* openssl < 0.9.9 */
for (i = 0; i < num_elem; i++)
HMAC_Update(&ctx, addr[i], len[i]);
mdlen = 32;
#if OPENSSL_VERSION_NUMBER < 0x00909000
HMAC_Final(&ctx, mac, &mdlen);
res = 1;
#else /* openssl < 0.9.9 */
res = HMAC_Final(&ctx, mac, &mdlen);
#endif /* openssl < 0.9.9 */
HMAC_CTX_cleanup(&ctx);
return res == 1 ? 0 : -1;
}
int hmac_sha256(const u8 *key, size_t key_len, const u8 *data,
size_t data_len, u8 *mac)
{
return hmac_sha256_vector(key, key_len, 1, &data, &data_len, mac);
}
#endif /* CONFIG_SHA256 */
int crypto_get_random(void *buf, size_t len)
{
if (RAND_bytes(buf, len) != 1)