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unit: Add testing of Authenticator

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Just to make sure our private/public/shared and KDF utilities work
properly.
This commit is contained in:
Denis Kenzior 2016-08-23 15:44:45 -05:00
parent c2b1351396
commit 89207a4c81
1 changed files with 112 additions and 0 deletions
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112
unit/test-wsc.c
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@ -609,6 +609,8 @@ struct m1_data {
struct wsc_m1 expected;
const void *pdu;
unsigned int len;
const uint8_t *private_key;
uint32_t private_key_size;
const uint8_t *public_key;
uint32_t public_key_size;
};
@ -654,6 +656,8 @@ static const struct m1_data m1_data_1 = {
.os_version = 0,
.request_to_enroll = false,
},
.private_key = dh_private_key_1,
.private_key_size = sizeof(dh_private_key_1),
.public_key = dh_public_key_1,
.public_key_size = sizeof(dh_public_key_1),
};
@ -699,6 +703,8 @@ static const struct m1_data m1_data_2 = {
.os_version = 0,
.request_to_enroll = false,
},
.private_key = dh_private_key_2,
.private_key_size = sizeof(dh_private_key_2),
.public_key = dh_public_key_2,
.public_key_size = sizeof(dh_public_key_2),
};
@ -770,6 +776,78 @@ static void wsc_test_build_m1(const void *data)
l_free(out);
}
static bool wsc_compute_authenticator(struct l_key *peer_public_key,
struct l_key *private_key,
struct l_key *prime,
const uint8_t *enrollee_nonce,
const uint8_t *enrollee_mac,
const uint8_t *registrar_nonce,
const uint8_t *prev_msg,
size_t prev_msg_len,
const uint8_t *cur_msg,
size_t cur_msg_len,
uint8_t *authenticator)
{
uint8_t shared_secret[192];
size_t shared_secret_len;
struct l_checksum *sha256;
uint8_t dhkey[32];
struct l_checksum *hmac_sha256;
uint8_t kdk[32];
ssize_t digest_len;
bool r;
struct iovec iov[3];
struct wsc_session_key session_key;
/* Compute shared secret */
shared_secret_len = sizeof(shared_secret);
r = l_key_compute_dh_secret(peer_public_key, private_key, prime,
shared_secret, &shared_secret_len);
assert(r);
sha256 = l_checksum_new(L_CHECKSUM_SHA256);
assert(sha256);
/* Compute DHKey */
assert(l_checksum_update(sha256, shared_secret, shared_secret_len));
digest_len = l_checksum_get_digest(sha256, dhkey, sizeof(dhkey));
assert(digest_len == 32);
l_checksum_free(sha256);
hmac_sha256 = l_checksum_new_hmac(L_CHECKSUM_SHA256,
dhkey, sizeof(dhkey));
assert(hmac_sha256);
iov[0].iov_base = (void *) enrollee_nonce;
iov[0].iov_len = 16;
iov[1].iov_base = (void *) enrollee_mac;
iov[1].iov_len = 6;
iov[2].iov_base = (void *) registrar_nonce;
iov[2].iov_len = 16;
assert(l_checksum_updatev(hmac_sha256, iov, 3));
digest_len = l_checksum_get_digest(hmac_sha256, kdk, sizeof(kdk));
assert(digest_len == 32);
l_checksum_free(hmac_sha256);
assert(wsc_kdf(kdk, &session_key, sizeof(session_key)));
hmac_sha256 = l_checksum_new_hmac(L_CHECKSUM_SHA256,
session_key.auth_key,
sizeof(session_key.auth_key));
iov[0].iov_base = (void *) prev_msg;
iov[0].iov_len = prev_msg_len;
iov[1].iov_base = (void *) cur_msg;
iov[1].iov_len = cur_msg_len - 12;
assert(l_checksum_updatev(hmac_sha256, iov, 2));
digest_len = l_checksum_get_digest(hmac_sha256, authenticator, 8);
assert(digest_len == 8);
l_checksum_free(hmac_sha256);
return true;
}
static const unsigned char eap_wsc_m2_1[] = {
0x01, 0x00, 0x01, 0xd6, 0x01, 0x02, 0x01, 0xd6, 0xfe, 0x00, 0x37, 0x2a,
0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x10, 0x4a, 0x00, 0x01, 0x10, 0x10,
@ -862,6 +940,7 @@ struct m2_data {
unsigned int len;
const uint8_t *public_key;
uint32_t public_key_size;
const struct m1_data *m1;
};
static const struct m2_data m2_data_1 = {
@ -908,6 +987,7 @@ static const struct m2_data m2_data_1 = {
},
.public_key = eap_wsc_m2_1 + 92,
.public_key_size = 192,
.m1 = &m1_data_1,
};
static const struct m2_data m2_data_2 = {
@ -954,6 +1034,7 @@ static const struct m2_data m2_data_2 = {
},
.public_key = eap_wsc_m2_2 + 92,
.public_key_size = 192,
.m1 = &m1_data_2,
};
static void wsc_test_parse_m2(const void *data)
@ -961,6 +1042,10 @@ static void wsc_test_parse_m2(const void *data)
const struct m2_data *test = data;
struct wsc_m2 m2;
const struct wsc_m2 *expected = &test->expected;
struct l_key *private;
struct l_key *prime;
struct l_key *peer_public;
uint8_t authenticator[8];
int r;
r = wsc_parse_m2(test->pdu, test->len, &m2);
@ -1001,6 +1086,33 @@ static void wsc_test_parse_m2(const void *data)
assert(!memcmp(expected->authenticator, m2.authenticator, 8));
assert(!memcmp(test->public_key, m2.public_key, 192));
prime = l_key_new(L_KEY_RAW, crypto_dh5_prime, crypto_dh5_prime_size);
assert(prime);
private = l_key_new(L_KEY_RAW, test->m1->private_key,
test->m1->private_key_size);
assert(private);
peer_public = l_key_new(L_KEY_RAW, test->public_key,
test->public_key_size);
assert(peer_public);
assert(wsc_compute_authenticator(peer_public, private, prime,
m2.enrollee_nonce,
test->m1->expected.addr,
m2.registrar_nonce,
test->m1->pdu,
test->m1->len,
test->pdu,
test->len,
authenticator));
assert(!memcmp(m2.authenticator, authenticator, 8));
l_key_free(prime);
l_key_free(private);
l_key_free(peer_public);
}
static void wsc_test_build_m2(const void *data)