wpa_supplicant: Initial Revision 0.8.X

Based on:
commit 0725cc7b7efc434910e89865c42eda7ce61bbf08
Author: Jouni Malinen <j@w1.fi>
Date:   Thu Apr 21 20:41:01 2011 +0300

    Enable CONFIG_DRIVER_NL80211=y in the default configuration

    nl80211 should be preferred over WEXT with any recent Linux
    kernel version.

Change-Id: I26aec5afbbd4f4a1f5fd900912545b6f5050de64
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/tls/tlsv1_client.c b/src/tls/tlsv1_client.c
new file mode 100644
index 0000000..afb6031
--- /dev/null
+++ b/src/tls/tlsv1_client.c
@@ -0,0 +1,667 @@
+/*
+ * TLSv1 client (RFC 2246)
+ * Copyright (c) 2006-2007, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "crypto/sha1.h"
+#include "crypto/tls.h"
+#include "tlsv1_common.h"
+#include "tlsv1_record.h"
+#include "tlsv1_client.h"
+#include "tlsv1_client_i.h"
+
+/* TODO:
+ * Support for a message fragmented across several records (RFC 2246, 6.2.1)
+ */
+
+
+void tls_alert(struct tlsv1_client *conn, u8 level, u8 description)
+{
+	conn->alert_level = level;
+	conn->alert_description = description;
+}
+
+
+void tlsv1_client_free_dh(struct tlsv1_client *conn)
+{
+	os_free(conn->dh_p);
+	os_free(conn->dh_g);
+	os_free(conn->dh_ys);
+	conn->dh_p = conn->dh_g = conn->dh_ys = NULL;
+}
+
+
+int tls_derive_pre_master_secret(u8 *pre_master_secret)
+{
+	WPA_PUT_BE16(pre_master_secret, TLS_VERSION);
+	if (os_get_random(pre_master_secret + 2,
+			  TLS_PRE_MASTER_SECRET_LEN - 2))
+		return -1;
+	return 0;
+}
+
+
+int tls_derive_keys(struct tlsv1_client *conn,
+		    const u8 *pre_master_secret, size_t pre_master_secret_len)
+{
+	u8 seed[2 * TLS_RANDOM_LEN];
+	u8 key_block[TLS_MAX_KEY_BLOCK_LEN];
+	u8 *pos;
+	size_t key_block_len;
+
+	if (pre_master_secret) {
+		wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: pre_master_secret",
+				pre_master_secret, pre_master_secret_len);
+		os_memcpy(seed, conn->client_random, TLS_RANDOM_LEN);
+		os_memcpy(seed + TLS_RANDOM_LEN, conn->server_random,
+			  TLS_RANDOM_LEN);
+		if (tls_prf(pre_master_secret, pre_master_secret_len,
+			    "master secret", seed, 2 * TLS_RANDOM_LEN,
+			    conn->master_secret, TLS_MASTER_SECRET_LEN)) {
+			wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive "
+				   "master_secret");
+			return -1;
+		}
+		wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: master_secret",
+				conn->master_secret, TLS_MASTER_SECRET_LEN);
+	}
+
+	os_memcpy(seed, conn->server_random, TLS_RANDOM_LEN);
+	os_memcpy(seed + TLS_RANDOM_LEN, conn->client_random, TLS_RANDOM_LEN);
+	key_block_len = 2 * (conn->rl.hash_size + conn->rl.key_material_len +
+			     conn->rl.iv_size);
+	if (tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
+		    "key expansion", seed, 2 * TLS_RANDOM_LEN,
+		    key_block, key_block_len)) {
+		wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive key_block");
+		return -1;
+	}
+	wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: key_block",
+			key_block, key_block_len);
+
+	pos = key_block;
+
+	/* client_write_MAC_secret */
+	os_memcpy(conn->rl.write_mac_secret, pos, conn->rl.hash_size);
+	pos += conn->rl.hash_size;
+	/* server_write_MAC_secret */
+	os_memcpy(conn->rl.read_mac_secret, pos, conn->rl.hash_size);
+	pos += conn->rl.hash_size;
+
+	/* client_write_key */
+	os_memcpy(conn->rl.write_key, pos, conn->rl.key_material_len);
+	pos += conn->rl.key_material_len;
+	/* server_write_key */
+	os_memcpy(conn->rl.read_key, pos, conn->rl.key_material_len);
+	pos += conn->rl.key_material_len;
+
+	/* client_write_IV */
+	os_memcpy(conn->rl.write_iv, pos, conn->rl.iv_size);
+	pos += conn->rl.iv_size;
+	/* server_write_IV */
+	os_memcpy(conn->rl.read_iv, pos, conn->rl.iv_size);
+	pos += conn->rl.iv_size;
+
+	return 0;
+}
+
+
+/**
+ * tlsv1_client_handshake - Process TLS handshake
+ * @conn: TLSv1 client connection data from tlsv1_client_init()
+ * @in_data: Input data from TLS peer
+ * @in_len: Input data length
+ * @out_len: Length of the output buffer.
+ * @appl_data: Pointer to application data pointer, or %NULL if dropped
+ * @appl_data_len: Pointer to variable that is set to appl_data length
+ * Returns: Pointer to output data, %NULL on failure
+ */
+u8 * tlsv1_client_handshake(struct tlsv1_client *conn,
+			    const u8 *in_data, size_t in_len,
+			    size_t *out_len, u8 **appl_data,
+			    size_t *appl_data_len)
+{
+	const u8 *pos, *end;
+	u8 *msg = NULL, *in_msg, *in_pos, *in_end, alert, ct;
+	size_t in_msg_len;
+	int no_appl_data;
+
+	if (conn->state == CLIENT_HELLO) {
+		if (in_len)
+			return NULL;
+		return tls_send_client_hello(conn, out_len);
+	}
+
+	if (in_data == NULL || in_len == 0)
+		return NULL;
+
+	pos = in_data;
+	end = in_data + in_len;
+	in_msg = os_malloc(in_len);
+	if (in_msg == NULL)
+		return NULL;
+
+	/* Each received packet may include multiple records */
+	while (pos < end) {
+		in_msg_len = in_len;
+		if (tlsv1_record_receive(&conn->rl, pos, end - pos,
+					 in_msg, &in_msg_len, &alert)) {
+			wpa_printf(MSG_DEBUG, "TLSv1: Processing received "
+				   "record failed");
+			tls_alert(conn, TLS_ALERT_LEVEL_FATAL, alert);
+			goto failed;
+		}
+		ct = pos[0];
+
+		in_pos = in_msg;
+		in_end = in_msg + in_msg_len;
+
+		/* Each received record may include multiple messages of the
+		 * same ContentType. */
+		while (in_pos < in_end) {
+			in_msg_len = in_end - in_pos;
+			if (tlsv1_client_process_handshake(conn, ct, in_pos,
+							   &in_msg_len,
+							   appl_data,
+							   appl_data_len) < 0)
+				goto failed;
+			in_pos += in_msg_len;
+		}
+
+		pos += TLS_RECORD_HEADER_LEN + WPA_GET_BE16(pos + 3);
+	}
+
+	os_free(in_msg);
+	in_msg = NULL;
+
+	no_appl_data = appl_data == NULL || *appl_data == NULL;
+	msg = tlsv1_client_handshake_write(conn, out_len, no_appl_data);
+
+failed:
+	os_free(in_msg);
+	if (conn->alert_level) {
+		conn->state = FAILED;
+		os_free(msg);
+		msg = tlsv1_client_send_alert(conn, conn->alert_level,
+					      conn->alert_description,
+					      out_len);
+	} else if (msg == NULL) {
+		msg = os_zalloc(1);
+		*out_len = 0;
+	}
+
+	return msg;
+}
+
+
+/**
+ * tlsv1_client_encrypt - Encrypt data into TLS tunnel
+ * @conn: TLSv1 client connection data from tlsv1_client_init()
+ * @in_data: Pointer to plaintext data to be encrypted
+ * @in_len: Input buffer length
+ * @out_data: Pointer to output buffer (encrypted TLS data)
+ * @out_len: Maximum out_data length 
+ * Returns: Number of bytes written to out_data, -1 on failure
+ *
+ * This function is used after TLS handshake has been completed successfully to
+ * send data in the encrypted tunnel.
+ */
+int tlsv1_client_encrypt(struct tlsv1_client *conn,
+			 const u8 *in_data, size_t in_len,
+			 u8 *out_data, size_t out_len)
+{
+	size_t rlen;
+
+	wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: Plaintext AppData",
+			in_data, in_len);
+
+	os_memcpy(out_data + TLS_RECORD_HEADER_LEN, in_data, in_len);
+
+	if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_APPLICATION_DATA,
+			      out_data, out_len, in_len, &rlen) < 0) {
+		wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
+		tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
+			  TLS_ALERT_INTERNAL_ERROR);
+		return -1;
+	}
+
+	return rlen;
+}
+
+
+/**
+ * tlsv1_client_decrypt - Decrypt data from TLS tunnel
+ * @conn: TLSv1 client connection data from tlsv1_client_init()
+ * @in_data: Pointer to input buffer (encrypted TLS data)
+ * @in_len: Input buffer length
+ * @out_data: Pointer to output buffer (decrypted data from TLS tunnel)
+ * @out_len: Maximum out_data length
+ * Returns: Number of bytes written to out_data, -1 on failure
+ *
+ * This function is used after TLS handshake has been completed successfully to
+ * receive data from the encrypted tunnel.
+ */
+int tlsv1_client_decrypt(struct tlsv1_client *conn,
+			 const u8 *in_data, size_t in_len,
+			 u8 *out_data, size_t out_len)
+{
+	const u8 *in_end, *pos;
+	int res;
+	u8 alert, *out_end, *out_pos;
+	size_t olen;
+
+	pos = in_data;
+	in_end = in_data + in_len;
+	out_pos = out_data;
+	out_end = out_data + out_len;
+
+	while (pos < in_end) {
+		if (pos[0] != TLS_CONTENT_TYPE_APPLICATION_DATA) {
+			wpa_printf(MSG_DEBUG, "TLSv1: Unexpected content type "
+				   "0x%x", pos[0]);
+			tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
+				  TLS_ALERT_UNEXPECTED_MESSAGE);
+			return -1;
+		}
+
+		olen = out_end - out_pos;
+		res = tlsv1_record_receive(&conn->rl, pos, in_end - pos,
+					   out_pos, &olen, &alert);
+		if (res < 0) {
+			wpa_printf(MSG_DEBUG, "TLSv1: Record layer processing "
+				   "failed");
+			tls_alert(conn, TLS_ALERT_LEVEL_FATAL, alert);
+			return -1;
+		}
+		out_pos += olen;
+		if (out_pos > out_end) {
+			wpa_printf(MSG_DEBUG, "TLSv1: Buffer not large enough "
+				   "for processing the received record");
+			tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
+				  TLS_ALERT_INTERNAL_ERROR);
+			return -1;
+		}
+
+		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();
+}
+
+
+/**
+ * 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 (tls_verify_hash_init(&conn->verify) < 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);
+	tls_verify_hash_free(&conn->verify);
+	os_free(conn->client_hello_ext);
+	tlsv1_client_free_dh(conn);
+	tlsv1_cred_free(conn->cred);
+	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;
+	case TLS_DH_anon_WITH_AES_128_CBC_SHA:
+		cipher = "ADH-AES-128-SHA";
+		break;
+	case TLS_RSA_WITH_AES_256_CBC_SHA:
+		cipher = "AES-256-SHA";
+		break;
+	case TLS_RSA_WITH_AES_128_CBC_SHA:
+		cipher = "AES-128-SHA";
+		break;
+	default:
+		return -1;
+	}
+
+	if (os_strlcpy(buf, cipher, buflen) >= buflen)
+		return -1;
+	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;
+
+	if (tls_verify_hash_init(&conn->verify) < 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->session_ticket_included = 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->session_ticket_included = 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_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)
+{
+	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;
+#ifndef CONFIG_CRYPTO_INTERNAL
+		suites[count++] = TLS_DH_anon_WITH_AES_256_CBC_SHA;
+#endif /* CONFIG_CRYPTO_INTERNAL */
+		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;
+
+		/*
+		 * Cisco AP (at least 350 and 1200 series) local authentication
+		 * server does not know how to search cipher suites from the
+		 * list and seem to require that the last entry in the list is
+		 * the one that it wants to use. However, TLS specification
+		 * requires the list to be in the client preference order. As a
+		 * workaround, add anon-DH AES-128-SHA1 again at the end of the
+		 * list to allow the Cisco code to find it.
+		 */
+		suites[count++] = TLS_DH_anon_WITH_AES_128_CBC_SHA;
+		conn->num_cipher_suites = count;
+	}
+
+	return 0;
+}
+
+
+/**
+ * tlsv1_client_set_cred - Set client credentials
+ * @conn: TLSv1 client connection data from tlsv1_client_init()
+ * @cred: Credentials from tlsv1_cred_alloc()
+ * Returns: 0 on success, -1 on failure
+ *
+ * On success, the client takes ownership of the credentials block and caller
+ * must not free it. On failure, caller is responsible for freeing the
+ * credential block.
+ */
+int tlsv1_client_set_cred(struct tlsv1_client *conn,
+			  struct tlsv1_credentials *cred)
+{
+	tlsv1_cred_free(conn->cred);
+	conn->cred = cred;
+	return 0;
+}
+
+
+void tlsv1_client_set_session_ticket_cb(struct tlsv1_client *conn,
+					tlsv1_client_session_ticket_cb cb,
+					void *ctx)
+{
+	wpa_printf(MSG_DEBUG, "TLSv1: SessionTicket callback set %p (ctx %p)",
+		   cb, ctx);
+	conn->session_ticket_cb = cb;
+	conn->session_ticket_cb_ctx = ctx;
+}