/**
* wpa_eapol_key_mic - Calculate EAPOL-Key MIC
* @key: EAPOL-Key Key Confirmation Key (KCK)
* @key_len: KCK length in octets
* @akmp: WPA_KEY_MGMT_* used in key derivation
* @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*)
* @buf: Pointer to the beginning of the EAPOL header (version field)
* @len: Length of the EAPOL frame (from EAPOL header to the end of the frame)
* @mic: Pointer to the buffer to which the EAPOL-Key MIC is written
* Returns: 0 on success, -1 on failure
*
* Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has
* to be cleared (all zeroes) when calling this function.
*
* Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the
* description of the Key MIC calculation. It includes packet data from the
* beginning of the EAPOL-Key header, not EAPOL header. This incorrect change
* happened during final editing of the standard and the correct behavior is
* defined in the last draft (IEEE 802.11i/D10).
*/
int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver,
const u8 *buf, size_t len, u8 *mic)
{
u8 hash[SHA384_MAC_LEN];
switch (ver) {
#ifndef CONFIG_FIPS
case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
return hmac_md5(key, key_len, buf, len, mic);
#endif /* CONFIG_FIPS */
case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
if (hmac_sha1(key, key_len, buf, len, hash))
return -1;
os_memcpy(mic, hash, MD5_MAC_LEN);
break;
#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
case WPA_KEY_INFO_TYPE_AES_128_CMAC:
return omac1_aes_128(key, buf, len, mic);
#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
case WPA_KEY_INFO_TYPE_AKM_DEFINED:
switch (akmp) {
#ifdef CONFIG_HS20
case WPA_KEY_MGMT_OSEN:
return omac1_aes_128(key, buf, len, mic);
#endif /* CONFIG_HS20 */
#ifdef CONFIG_SUITEB
case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
if (hmac_sha256(key, key_len, buf, len, hash))
return -1;
os_memcpy(mic, hash, MD5_MAC_LEN);
break;
#endif /* CONFIG_SUITEB */
#ifdef CONFIG_SUITEB192
case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
if (hmac_sha384(key, key_len, buf, len, hash))
return -1;
os_memcpy(mic, hash, 24);
break;
#endif /* CONFIG_SUITEB192 */
default:
return -1;
}
break;
default:
return -1;
}
return 0;
}
int fko_set_spa_hmac(fko_ctx_t ctx,
const char * const hmac_key, const int hmac_key_len)
{
unsigned char hmac[SHA512_DIGEST_STR_LEN] = {0};
char *hmac_base64 = NULL;
int hmac_digest_str_len = 0;
int hmac_digest_len = 0;
/* Must be initialized
*/
if(!CTX_INITIALIZED(ctx))
return(FKO_ERROR_CTX_NOT_INITIALIZED);
if(hmac_key_len > MAX_DIGEST_BLOCK_LEN)
return(FKO_ERROR_INVALID_HMAC_KEY_LEN);
if(ctx->hmac_type == FKO_HMAC_MD5)
{
hmac_md5(ctx->encrypted_msg,
ctx->encrypted_msg_len, hmac, hmac_key, hmac_key_len);
hmac_digest_len = MD5_DIGEST_LEN;
hmac_digest_str_len = MD5_DIGEST_STR_LEN;
}
else if(ctx->hmac_type == FKO_HMAC_SHA1)
{
hmac_sha1(ctx->encrypted_msg,
ctx->encrypted_msg_len, hmac, hmac_key, hmac_key_len);
hmac_digest_len = SHA1_DIGEST_LEN;
hmac_digest_str_len = SHA1_DIGEST_STR_LEN;
}
else if(ctx->hmac_type == FKO_HMAC_SHA256)
{
hmac_sha256(ctx->encrypted_msg,
ctx->encrypted_msg_len, hmac, hmac_key, hmac_key_len);
hmac_digest_len = SHA256_DIGEST_LEN;
hmac_digest_str_len = SHA256_DIGEST_STR_LEN;
}
else if(ctx->hmac_type == FKO_HMAC_SHA384)
{
hmac_sha384(ctx->encrypted_msg,
ctx->encrypted_msg_len, hmac, hmac_key, hmac_key_len);
hmac_digest_len = SHA384_DIGEST_LEN;
hmac_digest_str_len = SHA384_DIGEST_STR_LEN;
}
else if(ctx->hmac_type == FKO_HMAC_SHA512)
{
hmac_sha512(ctx->encrypted_msg,
ctx->encrypted_msg_len, hmac, hmac_key, hmac_key_len);
hmac_digest_len = SHA512_DIGEST_LEN;
hmac_digest_str_len = SHA512_DIGEST_STR_LEN;
}
hmac_base64 = calloc(1, MD_HEX_SIZE(hmac_digest_len)+1);
if (hmac_base64 == NULL)
return(FKO_ERROR_MEMORY_ALLOCATION);
b64_encode(hmac, hmac_base64, hmac_digest_len);
strip_b64_eq(hmac_base64);
if(ctx->msg_hmac != NULL)
free(ctx->msg_hmac);
ctx->msg_hmac = strdup(hmac_base64);
ctx->msg_hmac_len = strnlen(ctx->msg_hmac, hmac_digest_str_len);
free(hmac_base64);
switch(ctx->msg_hmac_len)
{
case MD5_B64_LEN:
break;
case SHA1_B64_LEN:
break;
case SHA256_B64_LEN:
break;
case SHA384_B64_LEN:
break;
case SHA512_B64_LEN:
break;
default:
return(FKO_ERROR_INVALID_DATA_HMAC_LEN_VALIDFAIL);
}
return FKO_SUCCESS;
}
int main(void)
{
static const char *vectors[] =
{
/* HMAC-SHA-224 */
"896fb1128abbdf196832107cd49df33f47b4b1169912ba4f53684b22",
"a30e01098bc6dbbf45690f3a7e9e6d0f8bbea2a39e6148008fd05e44",
"7fb3cb3588c6c1f6ffa9694d7d6ad2649365b0c1f65d69d1ec8333ea",
"6c11506874013cac6a2abc1bb382627cec6a90d86efc012de7afec5a",
"0e2aea68a90c8d37c988bcdb9fca6fa8",
"95e9a0db962095adaebe9b2d6f0dbce2d499f112f2d2b7273fa6870e",
"3a854166ac5d9f023f54d517d0b39dbd946770db9c2b95c9f6f565d1",
/* HMAC-SHA-256 */
"b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7",
"5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843",
"773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514ced565fe",
"82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff46729665b",
"a3b6167473100ee06e0c796c2955552b",
"60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f0ee37f54",
"9b09ffa71b942fcb27635fbcd5b0e944bfdc63644f0713938a7f51535c3a35e2",
/* HMAC-SHA-384 */
"afd03944d84895626b0825f4ab46907f15f9dadbe4101ec682aa034c7cebc59c"
"faea9ea9076ede7f4af152e8b2fa9cb6",
"af45d2e376484031617f78d2b58a6b1b9c7ef464f5a01b47e42ec3736322445e"
"8e2240ca5e69e2c78b3239ecfab21649",
"88062608d3e6ad8a0aa2ace014c8a86f0aa635d947ac9febe83ef4e55966144b"
"2a5ab39dc13814b94e3ab6e101a34f27",
"3e8a69b7783c25851933ab6290af6ca77a9981480850009cc5577c6e1f573b4e"
"6801dd23c4a7d679ccf8a386c674cffb",
"3abf34c3503b2a23a46efc619baef897",
"4ece084485813e9088d2c63a041bc5b44f9ef1012a2b588f3cd11f05033ac4c6"
"0c2ef6ab4030fe8296248df163f44952",
"6617178e941f020d351e2f254e8fd32c602420feb0b8fb9adccebb82461e99c5"
"a678cc31e799176d3860e6110c46523e",
/* HMAC-SHA-512 */
"87aa7cdea5ef619d4ff0b4241a1d6cb02379f4e2ce4ec2787ad0b30545e17cde"
"daa833b7d6b8a702038b274eaea3f4e4be9d914eeb61f1702e696c203a126854",
"164b7a7bfcf819e2e395fbe73b56e0a387bd64222e831fd610270cd7ea250554"
"9758bf75c05a994a6d034f65f8f0e6fdcaeab1a34d4a6b4b636e070a38bce737",
"fa73b0089d56a284efb0f0756c890be9b1b5dbdd8ee81a3655f83e33b2279d39"
"bf3e848279a722c806b485a47e67c807b946a337bee8942674278859e13292fb",
"b0ba465637458c6990e5a8c5f61d4af7e576d97ff94b872de76f8050361ee3db"
"a91ca5c11aa25eb4d679275cc5788063a5f19741120c4f2de2adebeb10a298dd",
"415fad6271580a531d4179bc891d87a6",
"80b24263c7c1a3ebb71493c1dd7be8b49b46d1f41b4aeec1121b013783f8f352"
"6b56d037e05f2598bd0fd2215d6a1e5295e64f73f63f0aec8b915a985d786598",
"e37b6a775dc87dbaa4dfa9f96e5e3ffddebd71f8867289865df5a32d20cdc944"
"b6022cac3c4982b10d5eeb55c3e4de15134676fb6de0446065c97440fa8c6a58"
};
static char *messages[] =
{
"Hi There",
"what do ya want for nothing?",
NULL,
NULL,
"Test With Truncation",
"Test Using Larger Than Block-Size Key - Hash Key First",
"This is a test using a larger than block-size key "
"and a larger than block-size data. The key needs"
" to be hashed before being used by the HMAC algorithm."
};
unsigned char mac[SHA512_DIGEST_SIZE];
unsigned char *keys[7];
unsigned int keys_len[7] = {20, 4, 20, 25, 20, 131, 131};
unsigned int messages2and3_len = 50;
unsigned int mac_224_size, mac_256_size, mac_384_size, mac_512_size;
int i;
for (i = 0; i < 7; i++) {
keys[i] = malloc(keys_len[i]);
if (keys[i] == NULL) {
fprintf(stderr, "Can't allocate memory\n");
return 1;
}
}
memset(keys[0], 0x0b, keys_len[0]);
strcpy((char *) keys[1], "Jefe");
memset(keys[2], 0xaa, keys_len[2]);
for (i = 0; i < (int) keys_len[3]; i++)
keys[3][i] = (unsigned char) i + 1;
memset(keys[4], 0x0c, keys_len[4]);
memset(keys[5], 0xaa, keys_len[5]);
memset(keys[6], 0xaa, keys_len[6]);
messages[2] = malloc(messages2and3_len + 1);
messages[3] = malloc(messages2and3_len + 1);
if (messages[2] == NULL || messages[3] == NULL) {
fprintf(stderr, "Can't allocate memory\n");
return 1;
}
messages[2][messages2and3_len] = '\0';
messages[3][messages2and3_len] = '\0';
memset(messages[2], 0xdd, messages2and3_len);
memset(messages[3], 0xcd, messages2and3_len);
printf("HMAC-SHA-2 IETF Validation tests\n\n");
for (i = 0; i < 7; i++) {
if (i != 4) {
mac_224_size = SHA224_DIGEST_SIZE;
mac_256_size = SHA256_DIGEST_SIZE;
mac_384_size = SHA384_DIGEST_SIZE;
mac_512_size = SHA512_DIGEST_SIZE;
} else {
mac_224_size = 128 / 8; mac_256_size = 128 / 8;
mac_384_size = 128 / 8; mac_512_size = 128 / 8;
}
printf("Test %d:\n", i + 1);
hmac_sha224(keys[i], keys_len[i], (unsigned char *) messages[i],
strlen(messages[i]), mac, mac_224_size);
test(vectors[i], mac, mac_224_size);
hmac_sha256(keys[i], keys_len[i], (unsigned char *) messages[i],
strlen(messages[i]), mac, mac_256_size);
test(vectors[7 + i], mac, mac_256_size);
hmac_sha384(keys[i], keys_len[i], (unsigned char *) messages[i],
strlen(messages[i]), mac, mac_384_size);
test(vectors[14 + i], mac, mac_384_size);
hmac_sha512(keys[i], keys_len[i], (unsigned char *) messages[i],
strlen(messages[i]), mac, mac_512_size);
test(vectors[21 + i], mac, mac_512_size);
}
printf("All tests passed.\n");
return 0;
}