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Provide CMAC high level API replacement
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wumiaont committed Mar 12, 2024
1 parent d411109 commit 01a3904
Showing 1 changed file with 38 additions and 0 deletions.
38 changes: 38 additions & 0 deletions src/crypto/crypto_openssl.c
Original file line number Diff line number Diff line change
Expand Up @@ -1218,6 +1218,43 @@ int crypto_get_random(void *buf, size_t len)
int omac1_aes_vector(const u8 *key, size_t key_len, size_t num_elem,
const u8 *addr[], const size_t *len, u8 *mac)
{
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
+ EVP_MAC_CTX *ctx = NULL;
+ EVP_MAC *emac;
+ int ret = -1;
+ size_t outlen, i;
+ OSSL_PARAM params[2];
+ char *cipher = NULL;
+ if (TEST_FAIL())
+ return -1;
+ emac = EVP_MAC_fetch(NULL, "CMAC", NULL);
+
+ if (key_len == 32)
+ cipher = "aes-256-cbc";
+ else if (key_len == 24)
+ cipher = "aes-192-cbc";
+ else if (key_len == 16)
+ cipher = "aes-128-cbc";
+
+ params[0] = OSSL_PARAM_construct_utf8_string("cipher", cipher, 0);
+ params[1] = OSSL_PARAM_construct_end();
+
+ if (!emac || !cipher ||
+ !(ctx = EVP_MAC_CTX_new(emac)) ||
+ EVP_MAC_init(ctx, key, key_len, params) != 1)
+ goto fail;
+
+ for (i = 0; i < num_elem; i++) {
+ if (!EVP_MAC_update(ctx, addr[i], len[i]))
+ goto fail;
+ }
+ if (EVP_MAC_final(ctx, mac, &outlen, 16) != 1 || outlen != 16)
+ goto fail;
+ ret = 0;
+fail:
+ EVP_MAC_CTX_free(ctx);
+ return ret;
+#else /* OpenSSL version >= 3.0 */
CMAC_CTX *ctx;
int ret = -1;
size_t outlen, i;
Expand Down Expand Up @@ -1249,6 +1286,7 @@ int omac1_aes_vector(const u8 *key, size_t key_len, size_t num_elem,
fail:
CMAC_CTX_free(ctx);
return ret;
#endif /* OpenSSL version >= 3.0 */
}


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