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wpa_supplicant: Saved message-type digest used in handshake for PRF operations

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This commit is contained in:
Laukik Hase 2021-12-27 18:45:15 +05:30
parent 8bf7882e84
commit 76a29cd68d
1 changed files with 4 additions and 2 deletions
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6
components/wpa_supplicant/src/crypto/tls_mbedtls.c
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@ -64,6 +64,7 @@ struct tls_connection {
tls_context_t *tls;
struct tls_data tls_io_data;
unsigned char randbytes[2 * TLS_RANDOM_LEN];
mbedtls_md_type_t mac;
};
static void tls_mbedtls_cleanup(tls_context_t *tls)
@ -653,6 +654,7 @@ struct wpabuf * tls_connection_handshake(void *tls_ctx,
if (tls->ssl.handshake) {
os_memcpy(conn->randbytes, tls->ssl.handshake->randbytes,
TLS_RANDOM_LEN * 2);
conn->mac = tls->ssl.handshake->ciphersuite_info->mac;
}
}
ret = mbedtls_ssl_handshake_step(&tls->ssl);
@ -882,10 +884,10 @@ static int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
wpa_hexdump_key(MSG_MSGDUMP, "random", seed, 2 * TLS_RANDOM_LEN);
wpa_hexdump_key(MSG_MSGDUMP, "master", ssl->session->master, TLS_MASTER_SECRET_LEN);
if (ssl->transform->ciphersuite_info->mac == MBEDTLS_MD_SHA384) {
if (conn->mac == MBEDTLS_MD_SHA384) {
ret = tls_prf_sha384(ssl->session->master, TLS_MASTER_SECRET_LEN,
label, seed, 2 * TLS_RANDOM_LEN, out, out_len);
} else if (ssl->transform->ciphersuite_info->mac == MBEDTLS_MD_SHA256) {
} else if (conn->mac == MBEDTLS_MD_SHA256) {
ret = tls_prf_sha256(ssl->session->master, TLS_MASTER_SECRET_LEN,
label, seed, 2 * TLS_RANDOM_LEN, out, out_len);
} else {