/*
- * TLSv1 client (RFC 2246)
- * Copyright (c) 2006-2007, Jouni Malinen <j@w1.fi>
+ * TLS v1.0/v1.1/v1.2 client (RFC 2246, RFC 4346, RFC 5246)
+ * Copyright (c) 2006-2014, 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.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "includes.h"
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,
+ if (tls_prf(conn->rl.tls_version,
+ 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 "
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_block_len = 2 * (conn->rl.hash_size + conn->rl.key_material_len);
+ if (conn->rl.tls_version == TLS_VERSION_1)
+ key_block_len += 2 * conn->rl.iv_size;
+ if (tls_prf(conn->rl.tls_version,
+ 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");
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;
+ if (conn->rl.tls_version == TLS_VERSION_1) {
+ /* 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;
+ } else {
+ /*
+ * Use IV field to set the mask value for TLS v1.1. A fixed
+ * mask of zero is used per the RFC 4346, 6.2.3.2 CBC Block
+ * Cipher option 2a.
+ */
+ os_memset(conn->rl.write_iv, 0, conn->rl.iv_size);
+ }
return 0;
}
* @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
+ * @need_more_data: Set to 1 if more data would be needed to complete
+ * processing
* 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)
+ size_t *appl_data_len, int *need_more_data)
{
const u8 *pos, *end;
- u8 *msg = NULL, *in_msg, *in_pos, *in_end, alert, ct;
+ u8 *msg = NULL, *in_msg = NULL, *in_pos, *in_end, alert, ct;
size_t in_msg_len;
int no_appl_data;
+ int used;
+
+ if (need_more_data)
+ *need_more_data = 0;
if (conn->state == CLIENT_HELLO) {
if (in_len)
return tls_send_client_hello(conn, out_len);
}
+ if (conn->partial_input) {
+ if (wpabuf_resize(&conn->partial_input, in_len) < 0) {
+ wpa_printf(MSG_DEBUG, "TLSv1: Failed to allocate "
+ "memory for pending record");
+ tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
+ TLS_ALERT_INTERNAL_ERROR);
+ goto failed;
+ }
+ wpabuf_put_data(conn->partial_input, in_data, in_len);
+ in_data = wpabuf_head(conn->partial_input);
+ in_len = wpabuf_len(conn->partial_input);
+ }
+
if (in_data == NULL || in_len == 0)
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)) {
+ used = tlsv1_record_receive(&conn->rl, pos, end - pos,
+ in_msg, &in_msg_len, &alert);
+ if (used < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Processing received "
"record failed");
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, alert);
goto failed;
}
+ if (used == 0) {
+ struct wpabuf *partial;
+ wpa_printf(MSG_DEBUG, "TLSv1: Need more data");
+ partial = wpabuf_alloc_copy(pos, end - pos);
+ wpabuf_free(conn->partial_input);
+ conn->partial_input = partial;
+ if (conn->partial_input == NULL) {
+ wpa_printf(MSG_DEBUG, "TLSv1: Failed to "
+ "allocate memory for pending "
+ "record");
+ tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
+ TLS_ALERT_INTERNAL_ERROR);
+ goto failed;
+ }
+ os_free(in_msg);
+ if (need_more_data)
+ *need_more_data = 1;
+ return NULL;
+ }
ct = pos[0];
in_pos = in_msg;
in_pos += in_msg_len;
}
- pos += TLS_RECORD_HEADER_LEN + WPA_GET_BE16(pos + 3);
+ pos += used;
}
os_free(in_msg);
failed:
os_free(in_msg);
if (conn->alert_level) {
+ wpabuf_free(conn->partial_input);
+ conn->partial_input = NULL;
conn->state = FAILED;
os_free(msg);
msg = tlsv1_client_send_alert(conn, conn->alert_level,
*out_len = 0;
}
+ if (need_more_data == NULL || !(*need_more_data)) {
+ wpabuf_free(conn->partial_input);
+ conn->partial_input = NULL;
+ }
+
return msg;
}
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) {
+ out_data, out_len, in_data, 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);
* @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
+ * @need_more_data: Set to 1 if more data would be needed to complete
+ * processing
+ * Returns: Decrypted data or %NULL 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)
+struct wpabuf * tlsv1_client_decrypt(struct tlsv1_client *conn,
+ const u8 *in_data, size_t in_len,
+ int *need_more_data)
{
const u8 *in_end, *pos;
- int res;
- u8 alert, *out_end, *out_pos;
+ int used;
+ u8 alert, *out_pos, ct;
size_t olen;
+ struct wpabuf *buf = NULL;
+
+ if (need_more_data)
+ *need_more_data = 0;
+
+ if (conn->partial_input) {
+ if (wpabuf_resize(&conn->partial_input, in_len) < 0) {
+ wpa_printf(MSG_DEBUG, "TLSv1: Failed to allocate "
+ "memory for pending record");
+ alert = TLS_ALERT_INTERNAL_ERROR;
+ goto fail;
+ }
+ wpabuf_put_data(conn->partial_input, in_data, in_len);
+ in_data = wpabuf_head(conn->partial_input);
+ in_len = wpabuf_len(conn->partial_input);
+ }
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;
+ ct = pos[0];
+ if (wpabuf_resize(&buf, in_end - pos) < 0) {
+ alert = TLS_ALERT_INTERNAL_ERROR;
+ goto fail;
}
-
- olen = out_end - out_pos;
- res = tlsv1_record_receive(&conn->rl, pos, in_end - pos,
- out_pos, &olen, &alert);
- if (res < 0) {
+ out_pos = wpabuf_put(buf, 0);
+ olen = wpabuf_tailroom(buf);
+ used = tlsv1_record_receive(&conn->rl, pos, in_end - pos,
+ out_pos, &olen, &alert);
+ if (used < 0) {
wpa_printf(MSG_DEBUG, "TLSv1: Record layer processing "
"failed");
- tls_alert(conn, TLS_ALERT_LEVEL_FATAL, alert);
- return -1;
+ goto fail;
}
- 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;
+ if (used == 0) {
+ struct wpabuf *partial;
+ wpa_printf(MSG_DEBUG, "TLSv1: Need more data");
+ partial = wpabuf_alloc_copy(pos, in_end - pos);
+ wpabuf_free(conn->partial_input);
+ conn->partial_input = partial;
+ if (conn->partial_input == NULL) {
+ wpa_printf(MSG_DEBUG, "TLSv1: Failed to "
+ "allocate memory for pending "
+ "record");
+ alert = TLS_ALERT_INTERNAL_ERROR;
+ goto fail;
+ }
+ if (need_more_data)
+ *need_more_data = 1;
+ return buf;
+ }
+
+ if (ct == TLS_CONTENT_TYPE_ALERT) {
+ if (olen < 2) {
+ wpa_printf(MSG_DEBUG, "TLSv1: Alert "
+ "underflow");
+ alert = TLS_ALERT_DECODE_ERROR;
+ goto fail;
+ }
+ wpa_printf(MSG_DEBUG, "TLSv1: Received alert %d:%d",
+ out_pos[0], out_pos[1]);
+ if (out_pos[0] == TLS_ALERT_LEVEL_WARNING) {
+ /* Continue processing */
+ pos += used;
+ continue;
+ }
+
+ alert = out_pos[1];
+ goto fail;
}
- pos += TLS_RECORD_HEADER_LEN + WPA_GET_BE16(pos + 3);
+ if (ct != TLS_CONTENT_TYPE_APPLICATION_DATA) {
+ wpa_printf(MSG_DEBUG, "TLSv1: Unexpected content type "
+ "0x%x when decrypting application data",
+ pos[0]);
+ alert = TLS_ALERT_UNEXPECTED_MESSAGE;
+ goto fail;
+ }
+
+ wpabuf_put(buf, olen);
+
+ pos += used;
}
- return out_pos - out_data;
+ wpabuf_free(conn->partial_input);
+ conn->partial_input = NULL;
+ return buf;
+
+fail:
+ wpabuf_free(buf);
+ wpabuf_free(conn->partial_input);
+ conn->partial_input = NULL;
+ tls_alert(conn, TLS_ALERT_LEVEL_FATAL, alert);
+ return NULL;
}
count = 0;
suites = conn->cipher_suites;
-#ifndef CONFIG_CRYPTO_INTERNAL
+ suites[count++] = TLS_DHE_RSA_WITH_AES_256_CBC_SHA256;
+ suites[count++] = TLS_RSA_WITH_AES_256_CBC_SHA256;
+ suites[count++] = TLS_DHE_RSA_WITH_AES_256_CBC_SHA;
suites[count++] = TLS_RSA_WITH_AES_256_CBC_SHA;
-#endif /* CONFIG_CRYPTO_INTERNAL */
+ suites[count++] = TLS_DHE_RSA_WITH_AES_128_CBC_SHA256;
+ suites[count++] = TLS_RSA_WITH_AES_128_CBC_SHA256;
+ suites[count++] = TLS_DHE_RSA_WITH_AES_128_CBC_SHA;
suites[count++] = TLS_RSA_WITH_AES_128_CBC_SHA;
+ suites[count++] = TLS_DHE_RSA_WITH_3DES_EDE_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;
+ conn->rl.tls_version = TLS_VERSION;
+
return conn;
}
os_free(conn->client_hello_ext);
tlsv1_client_free_dh(conn);
tlsv1_cred_free(conn->cred);
+ wpabuf_free(conn->partial_input);
os_free(conn);
}
TLS_RANDOM_LEN);
}
- return tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
+ return tls_prf(conn->rl.tls_version,
+ conn->master_secret, TLS_MASTER_SECRET_LEN,
label, seed, 2 * TLS_RANDOM_LEN, out, out_len);
}
case TLS_RSA_WITH_3DES_EDE_CBC_SHA:
cipher = "DES-CBC3-SHA";
break;
+ case TLS_DHE_RSA_WITH_DES_CBC_SHA:
+ cipher = "DHE-RSA-DES-CBC-SHA";
+ break;
+ case TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA:
+ cipher = "DHE-RSA-DES-CBC3-SHA";
+ break;
+ case TLS_DH_anon_WITH_RC4_128_MD5:
+ cipher = "ADH-RC4-MD5";
+ break;
+ case TLS_DH_anon_WITH_DES_CBC_SHA:
+ cipher = "ADH-DES-SHA";
+ break;
+ case TLS_DH_anon_WITH_3DES_EDE_CBC_SHA:
+ cipher = "ADH-DES-CBC3-SHA";
+ break;
+ case TLS_RSA_WITH_AES_128_CBC_SHA:
+ cipher = "AES-128-SHA";
+ break;
+ case TLS_DHE_RSA_WITH_AES_128_CBC_SHA:
+ cipher = "DHE-RSA-AES-128-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";
+ case TLS_DHE_RSA_WITH_AES_256_CBC_SHA:
+ cipher = "DHE-RSA-AES-256-SHA";
+ break;
+ case TLS_DH_anon_WITH_AES_256_CBC_SHA:
+ cipher = "ADH-AES-256-SHA";
+ break;
+ case TLS_RSA_WITH_AES_128_CBC_SHA256:
+ cipher = "AES-128-SHA256";
+ break;
+ case TLS_RSA_WITH_AES_256_CBC_SHA256:
+ cipher = "AES-256-SHA256";
+ break;
+ case TLS_DHE_RSA_WITH_AES_128_CBC_SHA256:
+ cipher = "DHE-RSA-AES-128-SHA256";
+ break;
+ case TLS_DHE_RSA_WITH_AES_256_CBC_SHA256:
+ cipher = "DHE-RSA-AES-256-SHA256";
+ break;
+ case TLS_DH_anon_WITH_AES_128_CBC_SHA256:
+ cipher = "ADH-AES-128-SHA256";
+ break;
+ case TLS_DH_anon_WITH_AES_256_CBC_SHA256:
+ cipher = "ADH-AES-256-SHA256";
break;
default:
return -1;
/**
- * tlsv1_client_get_keys - Get master key and random data from TLS connection
+ * tlsv1_client_get_random - Get random data from TLS connection
* @conn: TLSv1 client connection data from tlsv1_client_init()
- * @keys: Structure of key/random data (filled on success)
+ * @keys: Structure of 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)
+int tlsv1_client_get_random(struct tlsv1_client *conn, struct tls_random *keys)
{
os_memset(keys, 0, sizeof(*keys));
if (conn->state == CLIENT_HELLO)
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;
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_SHA256;
suites[count++] = TLS_DH_anon_WITH_AES_256_CBC_SHA;
-#endif /* CONFIG_CRYPTO_INTERNAL */
+ suites[count++] = TLS_DH_anon_WITH_AES_128_CBC_SHA256;
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;
}
+void tlsv1_client_set_time_checks(struct tlsv1_client *conn, int enabled)
+{
+ conn->disable_time_checks = !enabled;
+}
+
+
void tlsv1_client_set_session_ticket_cb(struct tlsv1_client *conn,
tlsv1_client_session_ticket_cb cb,
void *ctx)
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