mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
50b4cf9286
Fix inter operability issue with freeradius version 3.0.21 and openssl 1.1.1f when internal tls client is used which requires extension elements in client hello. closes https://github.com/espressif/esp-idf/issues/5273 closes https://github.com/espressif/esp-idf/issues/5627
1054 lines
28 KiB
C
1054 lines
28 KiB
C
/*
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* TLSv1 client - read handshake message
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* Copyright (c) 2006-2011, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "utils/includes.h"
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#include "utils/common.h"
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#include "crypto/md5.h"
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#include "crypto/sha1.h"
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#include "crypto/sha256.h"
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#include "tls/tls.h"
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#include "tls/x509v3.h"
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#include "tls/tlsv1_common.h"
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#include "tls/tlsv1_record.h"
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#include "tls/tlsv1_client.h"
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#include "tls/tlsv1_client_i.h"
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#include "eap_peer/eap_i.h"
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static int tls_process_server_key_exchange(struct tlsv1_client *conn, u8 ct,
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const u8 *in_data, size_t *in_len);
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static int tls_process_certificate_request(struct tlsv1_client *conn, u8 ct,
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const u8 *in_data, size_t *in_len);
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static int tls_process_server_hello_done(struct tlsv1_client *conn, u8 ct,
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const u8 *in_data, size_t *in_len);
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static int tls_process_server_hello(struct tlsv1_client *conn, u8 ct,
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const u8 *in_data, size_t *in_len)
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{
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const u8 *pos, *end;
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size_t left, len, i;
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u16 cipher_suite;
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u16 tls_version;
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if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
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wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
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"received content type 0x%x", ct);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_UNEXPECTED_MESSAGE);
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return -1;
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}
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pos = in_data;
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left = *in_len;
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if (left < 4)
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goto decode_error;
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/* HandshakeType msg_type */
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if (*pos != TLS_HANDSHAKE_TYPE_SERVER_HELLO) {
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wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
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"message %d (expected ServerHello)", *pos);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_UNEXPECTED_MESSAGE);
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return -1;
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}
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wpa_printf(MSG_DEBUG, "TLSv1: Received ServerHello");
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pos++;
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/* uint24 length */
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len = WPA_GET_BE24(pos);
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pos += 3;
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left -= 4;
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if (len > left)
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goto decode_error;
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/* body - ServerHello */
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wpa_hexdump(MSG_MSGDUMP, "TLSv1: ServerHello", pos, len);
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end = pos + len;
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/* ProtocolVersion server_version */
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if (end - pos < 2)
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goto decode_error;
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tls_version = WPA_GET_BE16(pos);
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if (!tls_version_ok(tls_version)) {
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wpa_printf(MSG_DEBUG, "TLSv1: Unexpected protocol version in "
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"ServerHello %u.%u", pos[0], pos[1]);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_PROTOCOL_VERSION);
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return -1;
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}
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pos += 2;
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wpa_printf(MSG_DEBUG, "TLSv1: Using TLS v%s",
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tls_version_str(tls_version));
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conn->rl.tls_version = tls_version;
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/* Random random */
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if (end - pos < TLS_RANDOM_LEN)
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goto decode_error;
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os_memcpy(conn->server_random, pos, TLS_RANDOM_LEN);
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pos += TLS_RANDOM_LEN;
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wpa_hexdump(MSG_MSGDUMP, "TLSv1: server_random",
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conn->server_random, TLS_RANDOM_LEN);
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/* SessionID session_id */
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if (end - pos < 1)
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goto decode_error;
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if (end - pos < 1 + *pos || *pos > TLS_SESSION_ID_MAX_LEN)
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goto decode_error;
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if (conn->session_id_len && conn->session_id_len == *pos &&
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os_memcmp(conn->session_id, pos + 1, conn->session_id_len) == 0) {
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pos += 1 + conn->session_id_len;
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wpa_printf(MSG_DEBUG, "TLSv1: Resuming old session");
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conn->session_resumed = 1;
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} else {
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conn->session_id_len = *pos;
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pos++;
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os_memcpy(conn->session_id, pos, conn->session_id_len);
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pos += conn->session_id_len;
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}
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wpa_hexdump(MSG_MSGDUMP, "TLSv1: session_id",
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conn->session_id, conn->session_id_len);
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/* CipherSuite cipher_suite */
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if (end - pos < 2)
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goto decode_error;
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cipher_suite = WPA_GET_BE16(pos);
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pos += 2;
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for (i = 0; i < conn->num_cipher_suites; i++) {
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if (cipher_suite == conn->cipher_suites[i])
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break;
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}
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if (i == conn->num_cipher_suites) {
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wpa_printf(MSG_INFO, "TLSv1: Server selected unexpected "
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"cipher suite 0x%04x", cipher_suite);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_ILLEGAL_PARAMETER);
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return -1;
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}
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if (conn->session_resumed && cipher_suite != conn->prev_cipher_suite) {
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wpa_printf(MSG_DEBUG, "TLSv1: Server selected a different "
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"cipher suite for a resumed connection (0x%04x != "
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"0x%04x)", cipher_suite, conn->prev_cipher_suite);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_ILLEGAL_PARAMETER);
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return -1;
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}
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if (tlsv1_record_set_cipher_suite(&conn->rl, cipher_suite) < 0) {
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wpa_printf(MSG_DEBUG, "TLSv1: Failed to set CipherSuite for "
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"record layer");
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_INTERNAL_ERROR);
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return -1;
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}
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conn->prev_cipher_suite = cipher_suite;
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/* CompressionMethod compression_method */
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if (end - pos < 1)
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goto decode_error;
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if (*pos != TLS_COMPRESSION_NULL) {
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wpa_printf(MSG_INFO, "TLSv1: Server selected unexpected "
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"compression 0x%02x", *pos);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_ILLEGAL_PARAMETER);
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return -1;
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}
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pos++;
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if (end != pos) {
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/* TODO: ServerHello extensions */
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wpa_hexdump(MSG_DEBUG, "TLSv1: Unexpected extra data in the "
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"end of ServerHello", pos, end - pos);
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goto decode_error;
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}
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if (conn->session_ticket_included && conn->session_ticket_cb) {
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/* TODO: include SessionTicket extension if one was included in
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* ServerHello */
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int res = conn->session_ticket_cb(
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conn->session_ticket_cb_ctx, NULL, 0,
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conn->client_random, conn->server_random,
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conn->master_secret);
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if (res < 0) {
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wpa_printf(MSG_DEBUG, "TLSv1: SessionTicket callback "
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"indicated failure");
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_HANDSHAKE_FAILURE);
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return -1;
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}
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conn->use_session_ticket = !!res;
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}
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if ((conn->session_resumed || conn->use_session_ticket) &&
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tls_derive_keys(conn, NULL, 0)) {
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wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive keys");
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_INTERNAL_ERROR);
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return -1;
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}
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*in_len = end - in_data;
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conn->state = (conn->session_resumed || conn->use_session_ticket) ?
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SERVER_CHANGE_CIPHER_SPEC : SERVER_CERTIFICATE;
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return 0;
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decode_error:
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wpa_printf(MSG_DEBUG, "TLSv1: Failed to decode ServerHello");
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
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return -1;
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}
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static int tls_process_certificate(struct tlsv1_client *conn, u8 ct,
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const u8 *in_data, size_t *in_len)
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{
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const u8 *pos, *end;
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size_t left, len, list_len, cert_len, idx;
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u8 type;
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struct x509_certificate *chain = NULL, *last = NULL, *cert;
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int reason;
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if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
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wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
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"received content type 0x%x", ct);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_UNEXPECTED_MESSAGE);
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return -1;
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}
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pos = in_data;
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left = *in_len;
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if (left < 4) {
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wpa_printf(MSG_DEBUG, "TLSv1: Too short Certificate message "
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"(len=%lu)", (unsigned long) left);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
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return -1;
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}
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type = *pos++;
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len = WPA_GET_BE24(pos);
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pos += 3;
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left -= 4;
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if (len > left) {
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wpa_printf(MSG_DEBUG, "TLSv1: Unexpected Certificate message "
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"length (len=%lu != left=%lu)",
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(unsigned long) len, (unsigned long) left);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
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return -1;
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}
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if (type == TLS_HANDSHAKE_TYPE_SERVER_KEY_EXCHANGE)
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return tls_process_server_key_exchange(conn, ct, in_data,
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in_len);
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if (type == TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST)
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return tls_process_certificate_request(conn, ct, in_data,
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in_len);
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if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
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return tls_process_server_hello_done(conn, ct, in_data,
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in_len);
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if (type != TLS_HANDSHAKE_TYPE_CERTIFICATE) {
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wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
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"message %d (expected Certificate/"
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"ServerKeyExchange/CertificateRequest/"
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"ServerHelloDone)", type);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_UNEXPECTED_MESSAGE);
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return -1;
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}
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wpa_printf(MSG_DEBUG, "TLSv1: Received Certificate (certificate_list len %lu)",
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(unsigned long) len);
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/*
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* opaque ASN.1Cert<2^24-1>;
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*
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* struct {
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* ASN.1Cert certificate_list<1..2^24-1>;
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* } Certificate;
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*/
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end = pos + len;
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if (end - pos < 3) {
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wpa_printf(MSG_DEBUG, "TLSv1: Too short Certificate "
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"(left=%lu)", (unsigned long) left);
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
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return -1;
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}
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list_len = WPA_GET_BE24(pos);
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pos += 3;
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if ((size_t) (end - pos) != list_len) {
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wpa_printf(MSG_DEBUG, "TLSv1: Unexpected certificate_list "
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"length (len=%lu left=%lu)",
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(unsigned long) list_len,
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(unsigned long) (end - pos));
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
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return -1;
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}
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idx = 0;
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while (pos < end) {
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if (end - pos < 3) {
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wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
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"certificate_list");
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_DECODE_ERROR);
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x509_certificate_chain_free(chain);
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return -1;
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}
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cert_len = WPA_GET_BE24(pos);
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pos += 3;
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if ((size_t) (end - pos) < cert_len) {
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wpa_printf(MSG_DEBUG, "TLSv1: Unexpected certificate "
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"length (len=%lu left=%lu)",
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(unsigned long) cert_len,
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(unsigned long) (end - pos));
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_DECODE_ERROR);
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x509_certificate_chain_free(chain);
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return -1;
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}
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wpa_printf(MSG_DEBUG, "TLSv1: Certificate %lu (len %lu)",
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(unsigned long) idx, (unsigned long) cert_len);
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if (idx == 0) {
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crypto_public_key_free(conn->server_rsa_key);
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if (tls_parse_cert(pos, cert_len,
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&conn->server_rsa_key)) {
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wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
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"the certificate");
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_BAD_CERTIFICATE);
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x509_certificate_chain_free(chain);
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return -1;
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}
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}
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cert = x509_certificate_parse(pos, cert_len);
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if (cert == NULL) {
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wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
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"the certificate");
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_BAD_CERTIFICATE);
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x509_certificate_chain_free(chain);
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return -1;
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}
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if (last == NULL)
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chain = cert;
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else
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last->next = cert;
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last = cert;
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idx++;
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pos += cert_len;
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}
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if (conn->cred &&
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x509_certificate_chain_validate(conn->cred->trusted_certs, chain,
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&reason, conn->disable_time_checks)
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< 0) {
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int tls_reason;
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wpa_printf(MSG_DEBUG, "TLSv1: Server certificate chain "
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"validation failed (reason=%d)", reason);
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switch (reason) {
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case X509_VALIDATE_BAD_CERTIFICATE:
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tls_reason = TLS_ALERT_BAD_CERTIFICATE;
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break;
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case X509_VALIDATE_UNSUPPORTED_CERTIFICATE:
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tls_reason = TLS_ALERT_UNSUPPORTED_CERTIFICATE;
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break;
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case X509_VALIDATE_CERTIFICATE_REVOKED:
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tls_reason = TLS_ALERT_CERTIFICATE_REVOKED;
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break;
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case X509_VALIDATE_CERTIFICATE_EXPIRED:
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tls_reason = TLS_ALERT_CERTIFICATE_EXPIRED;
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break;
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case X509_VALIDATE_CERTIFICATE_UNKNOWN:
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tls_reason = TLS_ALERT_CERTIFICATE_UNKNOWN;
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break;
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case X509_VALIDATE_UNKNOWN_CA:
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tls_reason = TLS_ALERT_UNKNOWN_CA;
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break;
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default:
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tls_reason = TLS_ALERT_BAD_CERTIFICATE;
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break;
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}
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tls_alert(conn, TLS_ALERT_LEVEL_FATAL, tls_reason);
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x509_certificate_chain_free(chain);
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return -1;
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}
|
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|
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x509_certificate_chain_free(chain);
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|
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*in_len = end - in_data;
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conn->state = SERVER_KEY_EXCHANGE;
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|
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return 0;
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}
|
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|
|
|
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static int tlsv1_process_diffie_hellman(struct tlsv1_client *conn,
|
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const u8 *buf, size_t len,
|
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tls_key_exchange key_exchange)
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{
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const u8 *pos, *end, *server_params, *server_params_end;
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u8 alert;
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|
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tlsv1_client_free_dh(conn);
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|
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pos = buf;
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end = buf + len;
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|
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if (end - pos < 3)
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goto fail;
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server_params = pos;
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conn->dh_p_len = WPA_GET_BE16(pos);
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pos += 2;
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if (conn->dh_p_len == 0 || end - pos < (int) conn->dh_p_len) {
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wpa_printf(MSG_DEBUG, "TLSv1: Invalid dh_p length %lu",
|
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(unsigned long) conn->dh_p_len);
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goto fail;
|
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}
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conn->dh_p = os_malloc(conn->dh_p_len);
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if (conn->dh_p == NULL)
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goto fail;
|
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os_memcpy(conn->dh_p, pos, conn->dh_p_len);
|
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pos += conn->dh_p_len;
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wpa_hexdump(MSG_DEBUG, "TLSv1: DH p (prime)",
|
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conn->dh_p, conn->dh_p_len);
|
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|
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if (end - pos < 3)
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goto fail;
|
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conn->dh_g_len = WPA_GET_BE16(pos);
|
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pos += 2;
|
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if (conn->dh_g_len == 0 || end - pos < (int) conn->dh_g_len)
|
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goto fail;
|
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conn->dh_g = os_malloc(conn->dh_g_len);
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if (conn->dh_g == NULL)
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goto fail;
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os_memcpy(conn->dh_g, pos, conn->dh_g_len);
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pos += conn->dh_g_len;
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wpa_hexdump(MSG_DEBUG, "TLSv1: DH g (generator)",
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conn->dh_g, conn->dh_g_len);
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if (conn->dh_g_len == 1 && conn->dh_g[0] < 2)
|
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goto fail;
|
|
|
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if (end - pos < 3)
|
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goto fail;
|
|
conn->dh_ys_len = WPA_GET_BE16(pos);
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pos += 2;
|
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if (conn->dh_ys_len == 0 || end - pos < (int) conn->dh_ys_len)
|
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goto fail;
|
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conn->dh_ys = os_malloc(conn->dh_ys_len);
|
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if (conn->dh_ys == NULL)
|
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goto fail;
|
|
os_memcpy(conn->dh_ys, pos, conn->dh_ys_len);
|
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pos += conn->dh_ys_len;
|
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wpa_hexdump(MSG_DEBUG, "TLSv1: DH Ys (server's public value)",
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conn->dh_ys, conn->dh_ys_len);
|
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server_params_end = pos;
|
|
|
|
if (key_exchange == TLS_KEY_X_DHE_RSA) {
|
|
u8 hash[64];
|
|
int hlen;
|
|
|
|
if (conn->rl.tls_version == TLS_VERSION_1_2) {
|
|
#ifdef CONFIG_TLSV12
|
|
/*
|
|
* RFC 5246, 4.7:
|
|
* TLS v1.2 adds explicit indication of the used
|
|
* signature and hash algorithms.
|
|
*
|
|
* struct {
|
|
* HashAlgorithm hash;
|
|
* SignatureAlgorithm signature;
|
|
* } SignatureAndHashAlgorithm;
|
|
*/
|
|
if (end - pos < 2)
|
|
goto fail;
|
|
if ((pos[0] != TLS_HASH_ALG_SHA256) ||
|
|
pos[1] != TLS_SIGN_ALG_RSA) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1.2: Unsupported hash(%u)/signature(%u) algorithm",
|
|
pos[0], pos[1]);
|
|
goto fail;
|
|
}
|
|
|
|
hlen = tlsv12_key_x_server_params_hash(
|
|
conn->rl.tls_version, pos[0],
|
|
conn->client_random,
|
|
conn->server_random, server_params,
|
|
server_params_end - server_params, hash);
|
|
pos += 2;
|
|
#else /* CONFIG_TLSV12 */
|
|
goto fail;
|
|
#endif /* CONFIG_TLSV12 */
|
|
} else {
|
|
hlen = tls_key_x_server_params_hash(
|
|
conn->rl.tls_version, conn->client_random,
|
|
conn->server_random, server_params,
|
|
server_params_end - server_params, hash);
|
|
}
|
|
|
|
if (hlen < 0)
|
|
goto fail;
|
|
wpa_hexdump(MSG_MSGDUMP, "TLSv1: ServerKeyExchange hash",
|
|
hash, hlen);
|
|
|
|
if (tls_verify_signature(conn->rl.tls_version,
|
|
conn->server_rsa_key,
|
|
hash, hlen, pos, end - pos,
|
|
&alert) < 0)
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Processing DH params failed");
|
|
tlsv1_client_free_dh(conn);
|
|
return -1;
|
|
}
|
|
|
|
|
|
static int tls_process_server_key_exchange(struct tlsv1_client *conn, u8 ct,
|
|
const u8 *in_data, size_t *in_len)
|
|
{
|
|
const u8 *pos, *end;
|
|
size_t left, len;
|
|
u8 type;
|
|
const struct tls_cipher_suite *suite;
|
|
|
|
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
|
|
"received content type 0x%x", ct);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
pos = in_data;
|
|
left = *in_len;
|
|
|
|
if (left < 4) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Too short ServerKeyExchange "
|
|
"(Left=%lu)", (unsigned long) left);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
type = *pos++;
|
|
len = WPA_GET_BE24(pos);
|
|
pos += 3;
|
|
left -= 4;
|
|
|
|
if (len > left) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in ServerKeyExchange "
|
|
"length (len=%lu != left=%lu)",
|
|
(unsigned long) len, (unsigned long) left);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
end = pos + len;
|
|
|
|
if (type == TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST)
|
|
return tls_process_certificate_request(conn, ct, in_data,
|
|
in_len);
|
|
if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
|
|
return tls_process_server_hello_done(conn, ct, in_data,
|
|
in_len);
|
|
if (type != TLS_HANDSHAKE_TYPE_SERVER_KEY_EXCHANGE) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
|
|
"message %d (expected ServerKeyExchange/"
|
|
"CertificateRequest/ServerHelloDone)", type);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received ServerKeyExchange");
|
|
|
|
if (!tls_server_key_exchange_allowed(conn->rl.cipher_suite)) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: ServerKeyExchange not allowed "
|
|
"with the selected cipher suite");
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
wpa_hexdump(MSG_DEBUG, "TLSv1: ServerKeyExchange", pos, len);
|
|
suite = tls_get_cipher_suite(conn->rl.cipher_suite);
|
|
if (suite && (suite->key_exchange == TLS_KEY_X_DH_anon ||
|
|
suite->key_exchange == TLS_KEY_X_DHE_RSA)) {
|
|
if (tlsv1_process_diffie_hellman(conn, pos, len,
|
|
suite->key_exchange) < 0) {
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
} else {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: UnexpectedServerKeyExchange");
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
*in_len = end - in_data;
|
|
conn->state = SERVER_CERTIFICATE_REQUEST;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_certificate_request(struct tlsv1_client *conn, u8 ct,
|
|
const u8 *in_data, size_t *in_len)
|
|
{
|
|
const u8 *pos, *end;
|
|
size_t left, len;
|
|
u8 type;
|
|
|
|
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
|
|
"received content type 0x%x", ct);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
pos = in_data;
|
|
left = *in_len;
|
|
|
|
if (left < 4) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Too short CertificateRequest "
|
|
"(left=%lu)", (unsigned long) left);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
type = *pos++;
|
|
len = WPA_GET_BE24(pos);
|
|
pos += 3;
|
|
left -= 4;
|
|
|
|
if (len > left) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in CertificateRequest "
|
|
"length (len=%lu != left=%lu)",
|
|
(unsigned long) len, (unsigned long) left);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
end = pos + len;
|
|
|
|
if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
|
|
return tls_process_server_hello_done(conn, ct, in_data,
|
|
in_len);
|
|
if (type != TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
|
|
"message %d (expected CertificateRequest/"
|
|
"ServerHelloDone)", type);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received CertificateRequest");
|
|
|
|
conn->certificate_requested = 1;
|
|
|
|
*in_len = end - in_data;
|
|
conn->state = SERVER_HELLO_DONE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_server_hello_done(struct tlsv1_client *conn, u8 ct,
|
|
const u8 *in_data, size_t *in_len)
|
|
{
|
|
const u8 *pos, *end;
|
|
size_t left, len;
|
|
u8 type;
|
|
|
|
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
|
|
"received content type 0x%x", ct);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
pos = in_data;
|
|
left = *in_len;
|
|
|
|
if (left < 4) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Too short ServerHelloDone "
|
|
"(left=%lu)", (unsigned long) left);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
type = *pos++;
|
|
len = WPA_GET_BE24(pos);
|
|
pos += 3;
|
|
left -= 4;
|
|
|
|
if (len > left) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in ServerHelloDone "
|
|
"length (len=%lu != left=%lu)",
|
|
(unsigned long) len, (unsigned long) left);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
end = pos + len;
|
|
|
|
if (type != TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
|
|
"message %d (expected ServerHelloDone)", type);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received ServerHelloDone");
|
|
|
|
*in_len = end - in_data;
|
|
conn->state = CLIENT_KEY_EXCHANGE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_server_change_cipher_spec(struct tlsv1_client *conn,
|
|
u8 ct, const u8 *in_data,
|
|
size_t *in_len)
|
|
{
|
|
const u8 *pos;
|
|
size_t left;
|
|
|
|
if (ct != TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Expected ChangeCipherSpec; "
|
|
"received content type 0x%x", ct);
|
|
if (conn->use_session_ticket) {
|
|
int res;
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Server may have "
|
|
"rejected SessionTicket");
|
|
conn->use_session_ticket = 0;
|
|
|
|
/* Notify upper layers that SessionTicket failed */
|
|
res = conn->session_ticket_cb(
|
|
conn->session_ticket_cb_ctx, NULL, 0, NULL,
|
|
NULL, NULL);
|
|
if (res < 0) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: SessionTicket "
|
|
"callback indicated failure");
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_HANDSHAKE_FAILURE);
|
|
return -1;
|
|
}
|
|
printf("[Debug] set the state to server certificate \n");
|
|
conn->state = SERVER_CERTIFICATE;
|
|
return tls_process_certificate(conn, ct, in_data,
|
|
in_len);
|
|
}
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
pos = in_data;
|
|
left = *in_len;
|
|
|
|
if (left < 1) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Too short ChangeCipherSpec");
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
if (*pos != TLS_CHANGE_CIPHER_SPEC) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Expected ChangeCipherSpec; "
|
|
"received data 0x%x", *pos);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received ChangeCipherSpec");
|
|
if (tlsv1_record_change_read_cipher(&conn->rl) < 0) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Failed to change read cipher "
|
|
"for record layer");
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
*in_len = pos + 1 - in_data;
|
|
conn->state = SERVER_FINISHED;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_server_finished(struct tlsv1_client *conn, u8 ct,
|
|
const u8 *in_data, size_t *in_len)
|
|
{
|
|
const u8 *pos, *end;
|
|
size_t left, len, hlen;
|
|
u8 verify_data[TLS_VERIFY_DATA_LEN];
|
|
u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN];
|
|
|
|
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Expected Finished; "
|
|
"received content type 0x%x", ct);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
pos = in_data;
|
|
left = *in_len;
|
|
|
|
if (left < 4) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Too short record (left=%lu) for "
|
|
"Finished",
|
|
(unsigned long) left);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
if (pos[0] != TLS_HANDSHAKE_TYPE_FINISHED) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Expected Finished; received "
|
|
"type 0x%x", pos[0]);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
len = WPA_GET_BE24(pos + 1);
|
|
|
|
pos += 4;
|
|
left -= 4;
|
|
|
|
if (len > left) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Too short buffer for Finished "
|
|
"(len=%lu > left=%lu)",
|
|
(unsigned long) len, (unsigned long) left);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
end = pos + len;
|
|
if (len != TLS_VERIFY_DATA_LEN) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected verify_data length "
|
|
"in Finished: %lu (expected %d)",
|
|
(unsigned long) len, TLS_VERIFY_DATA_LEN);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
wpa_hexdump(MSG_MSGDUMP, "TLSv1: verify_data in Finished",
|
|
pos, TLS_VERIFY_DATA_LEN);
|
|
|
|
#ifdef CONFIG_TLSV12
|
|
if (conn->rl.tls_version >= TLS_VERSION_1_2) {
|
|
hlen = SHA256_MAC_LEN;
|
|
if (conn->verify.sha256_server == NULL ||
|
|
crypto_hash_finish(conn->verify.sha256_server, hash, &hlen) < 0) {
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_INTERNAL_ERROR);
|
|
conn->verify.sha256_server = NULL;
|
|
return -1;
|
|
}
|
|
conn->verify.sha256_server = NULL;
|
|
} else {
|
|
#endif /* CONFIG_TLSV12 */
|
|
|
|
hlen = MD5_MAC_LEN;
|
|
if (conn->verify.md5_server == NULL ||
|
|
crypto_hash_finish(conn->verify.md5_server, hash, &hlen) < 0) {
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
conn->verify.md5_server = NULL;
|
|
crypto_hash_finish(conn->verify.sha1_server, NULL, NULL);
|
|
conn->verify.sha1_server = NULL;
|
|
return -1;
|
|
}
|
|
conn->verify.md5_server = NULL;
|
|
hlen = SHA1_MAC_LEN;
|
|
if (conn->verify.sha1_server == NULL ||
|
|
crypto_hash_finish(conn->verify.sha1_server, hash + MD5_MAC_LEN,
|
|
&hlen) < 0) {
|
|
conn->verify.sha1_server = NULL;
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
conn->verify.sha1_server = NULL;
|
|
hlen = MD5_MAC_LEN + SHA1_MAC_LEN;
|
|
|
|
#ifdef CONFIG_TLSV12
|
|
}
|
|
#endif /* CONFIG_TLSV12 */
|
|
|
|
if (tls_prf(conn->rl.tls_version,
|
|
conn->master_secret, TLS_MASTER_SECRET_LEN,
|
|
"server finished", hash, hlen,
|
|
verify_data, TLS_VERIFY_DATA_LEN)) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive verify_data");
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECRYPT_ERROR);
|
|
return -1;
|
|
}
|
|
wpa_hexdump_key(MSG_DEBUG, "TLSv1: verify_data (server)",
|
|
verify_data, TLS_VERIFY_DATA_LEN);
|
|
|
|
if (os_memcmp(pos, verify_data, TLS_VERIFY_DATA_LEN) != 0) {
|
|
wpa_printf(MSG_INFO, "TLSv1: Mismatch in verify_data");
|
|
return -1;
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received Finished");
|
|
|
|
*in_len = end - in_data;
|
|
|
|
conn->state = (conn->session_resumed || conn->use_session_ticket) ?
|
|
CHANGE_CIPHER_SPEC : ACK_FINISHED;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_application_data(struct tlsv1_client *conn, u8 ct,
|
|
const u8 *in_data, size_t *in_len,
|
|
u8 **out_data, size_t *out_len)
|
|
{
|
|
const u8 *pos;
|
|
size_t left;
|
|
|
|
if (ct != TLS_CONTENT_TYPE_APPLICATION_DATA) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Expected Application Data; "
|
|
"received content type 0x%x", ct);
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
pos = in_data;
|
|
left = *in_len;
|
|
|
|
wpa_hexdump(MSG_DEBUG, "TLSv1: Application Data included in Handshake",
|
|
pos, left);
|
|
|
|
*out_data = os_malloc(left);
|
|
if (*out_data) {
|
|
os_memcpy(*out_data, pos, left);
|
|
*out_len = left;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int tlsv1_client_process_handshake(struct tlsv1_client *conn, u8 ct,
|
|
const u8 *buf, size_t *len,
|
|
u8 **out_data, size_t *out_len)
|
|
{
|
|
if (ct == TLS_CONTENT_TYPE_ALERT) {
|
|
if (*len < 2) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Alert underflow");
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received alert %d:%d",
|
|
buf[0], buf[1]);
|
|
*len = 2;
|
|
conn->state = FAILED;
|
|
return -1;
|
|
}
|
|
|
|
if (ct == TLS_CONTENT_TYPE_HANDSHAKE && *len >= 4 &&
|
|
buf[0] == TLS_HANDSHAKE_TYPE_HELLO_REQUEST) {
|
|
size_t hr_len = WPA_GET_BE24(buf + 1);
|
|
if (hr_len > *len - 4) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: HelloRequest underflow");
|
|
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Ignored HelloRequest");
|
|
*len = 4 + hr_len;
|
|
return 0;
|
|
}
|
|
|
|
switch (conn->state) {
|
|
case SERVER_HELLO:
|
|
if (tls_process_server_hello(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case SERVER_CERTIFICATE:
|
|
if (tls_process_certificate(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case SERVER_KEY_EXCHANGE:
|
|
if (tls_process_server_key_exchange(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case SERVER_CERTIFICATE_REQUEST:
|
|
if (tls_process_certificate_request(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case SERVER_HELLO_DONE:
|
|
if (tls_process_server_hello_done(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case SERVER_CHANGE_CIPHER_SPEC:
|
|
if (tls_process_server_change_cipher_spec(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case SERVER_FINISHED:
|
|
if (tls_process_server_finished(conn, ct, buf, len)) {
|
|
printf("[debug] server finish process fall \n");
|
|
return -1;
|
|
}
|
|
break;
|
|
case ACK_FINISHED:
|
|
if (out_data &&
|
|
tls_process_application_data(conn, ct, buf, len, out_data,
|
|
out_len))
|
|
return -1;
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected state %d "
|
|
"while processing received message",
|
|
conn->state);
|
|
return -1;
|
|
}
|
|
|
|
if (ct == TLS_CONTENT_TYPE_HANDSHAKE) {
|
|
tls_verify_hash_add(&conn->verify, buf, *len);
|
|
}
|
|
|
|
return 0;
|
|
}
|