tlsv1_client.c

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		}

		pos += TLS_RECORD_HEADER_LEN + WPA_GET_BE16(pos + 3);
	}

	return out_pos - out_data;
}


/**
 * tlsv1_client_global_init - Initialize TLSv1 client
 * Returns: 0 on success, -1 on failure
 *
 * This function must be called before using any other TLSv1 client functions.
 */
int tlsv1_client_global_init(void)
{
	return crypto_global_init();
}


/**
 * tlsv1_client_global_deinit - Deinitialize TLSv1 client
 *
 * This function can be used to deinitialize the TLSv1 client that was
 * initialized by calling tlsv1_client_global_init(). No TLSv1 client functions
 * can be called after this before calling tlsv1_client_global_init() again.
 */
void tlsv1_client_global_deinit(void)
{
	crypto_global_deinit();
}


static void tlsv1_client_free_verify_hashes(struct tlsv1_client *conn)
{
	crypto_hash_finish(conn->verify_md5_client, NULL, NULL);
	crypto_hash_finish(conn->verify_md5_server, NULL, NULL);
	crypto_hash_finish(conn->verify_md5_cert, NULL, NULL);
	crypto_hash_finish(conn->verify_sha1_client, NULL, NULL);
	crypto_hash_finish(conn->verify_sha1_server, NULL, NULL);
	crypto_hash_finish(conn->verify_sha1_cert, NULL, NULL);
	conn->verify_md5_client = NULL;
	conn->verify_md5_server = NULL;
	conn->verify_md5_cert = NULL;
	conn->verify_sha1_client = NULL;
	conn->verify_sha1_server = NULL;
	conn->verify_sha1_cert = NULL;
}


static int tlsv1_client_init_verify_hashes(struct tlsv1_client *conn)
{
	conn->verify_md5_client = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL,
						   0);
	conn->verify_md5_server = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL,
						   0);
	conn->verify_md5_cert = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL, 0);
	conn->verify_sha1_client = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL,
						    0);
	conn->verify_sha1_server = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL,
						    0);
	conn->verify_sha1_cert = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL,
						  0);
	if (conn->verify_md5_client == NULL ||
	    conn->verify_md5_server == NULL ||
	    conn->verify_md5_cert == NULL ||
	    conn->verify_sha1_client == NULL ||
	    conn->verify_sha1_server == NULL ||
	    conn->verify_sha1_cert == NULL) {
		tlsv1_client_free_verify_hashes(conn);
		return -1;
	}
	return 0;
}


/**
 * tlsv1_client_init - Initialize TLSv1 client connection
 * Returns: Pointer to TLSv1 client connection data or %NULL on failure
 */
struct tlsv1_client * tlsv1_client_init(void)
{
	struct tlsv1_client *conn;
	size_t count;
	u16 *suites;

	conn = os_zalloc(sizeof(*conn));
	if (conn == NULL)
		return NULL;

	conn->state = CLIENT_HELLO;

	if (tlsv1_client_init_verify_hashes(conn) < 0) {
		wpa_printf(MSG_DEBUG, "TLSv1: Failed to initialize verify "
			   "hash");
		os_free(conn);
		return NULL;
	}

	count = 0;
	suites = conn->cipher_suites;
#ifndef CONFIG_CRYPTO_INTERNAL
	suites[count++] = TLS_RSA_WITH_AES_256_CBC_SHA;
#endif /* CONFIG_CRYPTO_INTERNAL */
	suites[count++] = TLS_RSA_WITH_AES_128_CBC_SHA;
	suites[count++] = TLS_RSA_WITH_3DES_EDE_CBC_SHA;
	suites[count++] = TLS_RSA_WITH_RC4_128_SHA;
	suites[count++] = TLS_RSA_WITH_RC4_128_MD5;
	conn->num_cipher_suites = count;

	return conn;
}


/**
 * tlsv1_client_deinit - Deinitialize TLSv1 client connection
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 */
void tlsv1_client_deinit(struct tlsv1_client *conn)
{
	crypto_public_key_free(conn->server_rsa_key);
	tlsv1_record_set_cipher_suite(&conn->rl, TLS_NULL_WITH_NULL_NULL);
	tlsv1_record_change_write_cipher(&conn->rl);
	tlsv1_record_change_read_cipher(&conn->rl);
	tlsv1_client_free_verify_hashes(conn);
	os_free(conn->client_hello_ext);
	tlsv1_client_free_dh(conn);
	x509_certificate_chain_free(conn->trusted_certs);
	x509_certificate_chain_free(conn->client_cert);
	crypto_private_key_free(conn->client_key);
	os_free(conn);
}


/**
 * tlsv1_client_established - Check whether connection has been established
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * Returns: 1 if connection is established, 0 if not
 */
int tlsv1_client_established(struct tlsv1_client *conn)
{
	return conn->state == ESTABLISHED;
}


/**
 * tlsv1_client_prf - Use TLS-PRF to derive keying material
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * @label: Label (e.g., description of the key) for PRF
 * @server_random_first: seed is 0 = client_random|server_random,
 * 1 = server_random|client_random
 * @out: Buffer for output data from TLS-PRF
 * @out_len: Length of the output buffer
 * Returns: 0 on success, -1 on failure
 */
int tlsv1_client_prf(struct tlsv1_client *conn, const char *label,
		     int server_random_first, u8 *out, size_t out_len)
{
	u8 seed[2 * TLS_RANDOM_LEN];

	if (conn->state != ESTABLISHED)
		return -1;

	if (server_random_first) {
		os_memcpy(seed, conn->server_random, TLS_RANDOM_LEN);
		os_memcpy(seed + TLS_RANDOM_LEN, conn->client_random,
			  TLS_RANDOM_LEN);
	} else {
		os_memcpy(seed, conn->client_random, TLS_RANDOM_LEN);
		os_memcpy(seed + TLS_RANDOM_LEN, conn->server_random,
			  TLS_RANDOM_LEN);
	}

	return tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
		       label, seed, 2 * TLS_RANDOM_LEN, out, out_len);
}


/**
 * tlsv1_client_get_cipher - Get current cipher name
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * @buf: Buffer for the cipher name
 * @buflen: buf size
 * Returns: 0 on success, -1 on failure
 *
 * Get the name of the currently used cipher.
 */
int tlsv1_client_get_cipher(struct tlsv1_client *conn, char *buf,
			    size_t buflen)
{
	char *cipher;

	switch (conn->rl.cipher_suite) {
	case TLS_RSA_WITH_RC4_128_MD5:
		cipher = "RC4-MD5";
		break;
	case TLS_RSA_WITH_RC4_128_SHA:
		cipher = "RC4-SHA";
		break;
	case TLS_RSA_WITH_DES_CBC_SHA:
		cipher = "DES-CBC-SHA";
		break;
	case TLS_RSA_WITH_3DES_EDE_CBC_SHA:
		cipher = "DES-CBC3-SHA";
		break;
	default:
		return -1;
	}

	os_snprintf(buf, buflen, "%s", cipher);
	return 0;
}


/**
 * tlsv1_client_shutdown - Shutdown TLS connection
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * Returns: 0 on success, -1 on failure
 */
int tlsv1_client_shutdown(struct tlsv1_client *conn)
{
	conn->state = CLIENT_HELLO;

	tlsv1_client_free_verify_hashes(conn);
	if (tlsv1_client_init_verify_hashes(conn) < 0) {
		wpa_printf(MSG_DEBUG, "TLSv1: Failed to re-initialize verify "
			   "hash");
		return -1;
	}

	tlsv1_record_set_cipher_suite(&conn->rl, TLS_NULL_WITH_NULL_NULL);
	tlsv1_record_change_write_cipher(&conn->rl);
	tlsv1_record_change_read_cipher(&conn->rl);

	conn->certificate_requested = 0;
	crypto_public_key_free(conn->server_rsa_key);
	conn->server_rsa_key = NULL;
	conn->session_resumed = 0;

	return 0;
}


/**
 * tlsv1_client_resumed - Was session resumption used
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * Returns: 1 if current session used session resumption, 0 if not
 */
int tlsv1_client_resumed(struct tlsv1_client *conn)
{
	return !!conn->session_resumed;
}


/**
 * tlsv1_client_hello_ext - Set TLS extension for ClientHello
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * @ext_type: Extension type
 * @data: Extension payload (%NULL to remove extension)
 * @data_len: Extension payload length
 * Returns: 0 on success, -1 on failure
 */
int tlsv1_client_hello_ext(struct tlsv1_client *conn, int ext_type,
			   const u8 *data, size_t data_len)
{
	u8 *pos;

	conn->ticket = 0;
	os_free(conn->client_hello_ext);
	conn->client_hello_ext = NULL;
	conn->client_hello_ext_len = 0;

	if (data == NULL || data_len == 0)
		return 0;

	pos = conn->client_hello_ext = os_malloc(6 + data_len);
	if (pos == NULL)
		return -1;

	WPA_PUT_BE16(pos, 4 + data_len);
	pos += 2;
	WPA_PUT_BE16(pos, ext_type);
	pos += 2;
	WPA_PUT_BE16(pos, data_len);
	pos += 2;
	os_memcpy(pos, data, data_len);
	conn->client_hello_ext_len = 6 + data_len;

	if (ext_type == TLS_EXT_PAC_OPAQUE) {
		conn->ticket = 1;
		wpa_printf(MSG_DEBUG, "TLSv1: Using session ticket");
	}

	return 0;
}


/**
 * tlsv1_client_get_keys - Get master key and random data from TLS connection
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * @keys: Structure of key/random data (filled on success)
 * Returns: 0 on success, -1 on failure
 */
int tlsv1_client_get_keys(struct tlsv1_client *conn, struct tls_keys *keys)
{
	os_memset(keys, 0, sizeof(*keys));
	if (conn->state == CLIENT_HELLO)
		return -1;

	keys->client_random = conn->client_random;
	keys->client_random_len = TLS_RANDOM_LEN;

	if (conn->state != SERVER_HELLO) {
		keys->server_random = conn->server_random;
		keys->server_random_len = TLS_RANDOM_LEN;
		keys->master_key = conn->master_secret;
		keys->master_key_len = TLS_MASTER_SECRET_LEN;
	}

	return 0;
}


/**
 * tlsv1_client_set_master_key - Configure master secret for TLS connection
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * @key: TLS pre-master-secret
 * @key_len: length of key in bytes
 * Returns: 0 on success, -1 on failure
 */
int tlsv1_client_set_master_key(struct tlsv1_client *conn,
				const u8 *key, size_t key_len)
{
	if (key_len > TLS_MASTER_SECRET_LEN)
		return -1;
	wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: master_secret from session "
			"ticket", key, key_len);
	os_memcpy(conn->master_secret, key, key_len);
	conn->ticket_key = 1;

	return 0;
}


/**
 * tlsv1_client_get_keyblock_size - Get TLS key_block size
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * Returns: Size of the key_block for the negotiated cipher suite or -1 on
 * failure
 */
int tlsv1_client_get_keyblock_size(struct tlsv1_client *conn)
{
	if (conn->state == CLIENT_HELLO || conn->state == SERVER_HELLO)
		return -1;

	return 2 * (conn->rl.hash_size + conn->rl.key_material_len +
		    conn->rl.iv_size);
}


/**
 * tlsv1_client_set_cipher_list - Configure acceptable cipher suites
 * @conn: TLSv1 client connection data from tlsv1_client_init()
 * @ciphers: Zero (TLS_CIPHER_NONE) terminated list of allowed ciphers
 * (TLS_CIPHER_*).
 * Returns: 0 on success, -1 on failure
 */
int tlsv1_client_set_cipher_list(struct tlsv1_client *conn, u8 *ciphers)
{
#ifdef EAP_FAST
	size_t count;
	u16 *suites;

	/* TODO: implement proper configuration of cipher suites */
	if (ciphers[0] == TLS_CIPHER_ANON_DH_AES128_SHA) {
		count = 0;
		suites = conn->cipher_suites;
		suites[count++] = TLS_DH_anon_WITH_AES_256_CBC_SHA;
		suites[count++] = TLS_DH_anon_WITH_AES_128_CBC_SHA;
		suites[count++] = TLS_DH_anon_WITH_3DES_EDE_CBC_SHA;
		suites[count++] = TLS_DH_anon_WITH_RC4_128_MD5;
		suites[count++] = TLS_DH_anon_WITH_DES_CBC_SHA;
		conn->num_cipher_suites = count;
	}

	return 0;
#else /* EAP_FAST */
	return -1;
#endif /* EAP_FAST */
}


static int tlsv1_client_add_cert_der(struct x509_certificate **chain,
				     const u8 *buf, size_t len)
{
	struct x509_certificate *cert;
	char name[128];

	cert = x509_certificate_parse(buf, len);
	if (cert == NULL) {
		wpa_printf(MSG_INFO, "TLSv1: %s - failed to parse certificate",
			   __func__);
		return -1;
	}

	cert->next = *chain;
	*chain = cert;

	x509_name_string(&cert->subject, name, sizeof(name));
	wpa_printf(MSG_DEBUG, "TLSv1: Added certificate: %s", name);

	return 0;
}


static const char *pem_cert_begin = "-----BEGIN CERTIFICATE-----";
static const char *pem_cert_end = "-----END CERTIFICATE-----";


static const u8 * search_tag(const char *tag, const u8 *buf, size_t len)
{
	size_t i, plen;

	plen = os_strlen(tag);
	if (len < plen)
		return NULL;

	for (i = 0; i < len - plen; i++) {
		if (os_memcmp(buf + i, tag, plen) == 0)
			return buf + i;
	}

	return NULL;
}


static int tlsv1_client_add_cert(struct x509_certificate **chain,
				 const u8 *buf, size_t len)
{
	const u8 *pos, *end;
	unsigned char *der;
	size_t der_len;

	pos = search_tag(pem_cert_begin, buf, len);
	if (!pos) {
		wpa_printf(MSG_DEBUG, "TLSv1: No PEM certificate tag found - "
			   "assume DER format");
		return tlsv1_client_add_cert_der(chain, buf, len);
	}

	wpa_printf(MSG_DEBUG, "TLSv1: Converting PEM format certificate into "
		   "DER format");

	while (pos) {
		pos += os_strlen(pem_cert_begin);
		end = search_tag(pem_cert_end, pos, buf + len - pos);
		if (end == NULL) {
			wpa_printf(MSG_INFO, "TLSv1: Could not find PEM "
				   "certificate end tag (%s)", pem_cert_end);
			return -1;
		}

		der = base64_decode(pos, end - pos, &der_len);
		if (der == NULL) {
			wpa_printf(MSG_INFO, "TLSv1: Could not decode PEM "
				   "certificate");
			return -1;
		}

		if (tlsv1_client_add_cert_der(chain, der, der_len) < 0) {
			wpa_printf(MSG_INFO, "TLSv1: Failed to parse PEM "
				   "certificate after DER conversion");
			os_free(der);
			return -1;
		}

		os_free(der);

		end += os_strlen(pem_cert_end);
		pos = search_tag(pem_cert_begin, end, buf + len - end);
	}

	return 0;
}


static int tlsv1_client_set_cert_chain(struct x509_certificate **chain,
				       const char *cert, const u8 *cert_blob,
				       size_t cert_blob_len)
{
	if (cert_blob)
		return tlsv1_client_add_cert(chain, cert_blob, cert_blob_len);

	if (cert) {
		u8 *buf;
		size_t l