mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
c139683024
Move supplicant to idf and do following refactoring: 1. Make the folder structure consitent with supplicant upstream 2. Remove duplicated header files and minimize the public header files 3. Refactor for WiFi/supplicant interfaces
1255 lines
32 KiB
C
1255 lines
32 KiB
C
/*
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* TLSv1 server - 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_server.h"
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#include "tls/tlsv1_server_i.h"
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#include "eap_peer/eap_i.h"
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static int tls_process_client_key_exchange(struct tlsv1_server *conn, u8 ct,
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const u8 *in_data, size_t *in_len);
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static int tls_process_change_cipher_spec(struct tlsv1_server *conn,
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u8 ct, const u8 *in_data,
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size_t *in_len);
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static int tls_process_client_hello(struct tlsv1_server *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, *c;
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size_t left, len, i, j;
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u16 cipher_suite;
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u16 num_suites;
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int compr_null_found;
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u16 ext_type, ext_len;
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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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tlsv1_server_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_CLIENT_HELLO) {
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wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
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"message %d (expected ClientHello)", *pos);
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tlsv1_server_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 ClientHello");
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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 - ClientHello */
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wpa_hexdump(MSG_MSGDUMP, "TLSv1: ClientHello", pos, len);
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end = pos + len;
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/* ProtocolVersion client_version */
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if (end - pos < 2)
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goto decode_error;
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conn->client_version = WPA_GET_BE16(pos);
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wpa_printf(MSG_DEBUG, "TLSv1: Client version %d.%d",
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conn->client_version >> 8, conn->client_version & 0xff);
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if (conn->client_version < TLS_VERSION_1) {
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wpa_printf(MSG_DEBUG, "TLSv1: Unexpected protocol version in "
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"ClientHello %u.%u",
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conn->client_version >> 8,
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conn->client_version & 0xff);
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tlsv1_server_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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if (TLS_VERSION == TLS_VERSION_1)
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conn->rl.tls_version = TLS_VERSION_1;
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#ifdef CONFIG_TLSV12
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else if (conn->client_version >= TLS_VERSION_1_2)
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conn->rl.tls_version = TLS_VERSION_1_2;
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#endif /* CONFIG_TLSV12 */
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else if (conn->client_version > TLS_VERSION_1_1)
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conn->rl.tls_version = TLS_VERSION_1_1;
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else
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conn->rl.tls_version = conn->client_version;
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wpa_printf(MSG_DEBUG, "TLSv1: Using TLS v%s",
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tls_version_str(conn->rl.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->client_random, pos, TLS_RANDOM_LEN);
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pos += TLS_RANDOM_LEN;
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wpa_hexdump(MSG_MSGDUMP, "TLSv1: client_random",
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conn->client_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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wpa_hexdump(MSG_MSGDUMP, "TLSv1: client session_id", pos + 1, *pos);
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pos += 1 + *pos;
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/* TODO: add support for session resumption */
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/* CipherSuite cipher_suites<2..2^16-1> */
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if (end - pos < 2)
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goto decode_error;
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num_suites = WPA_GET_BE16(pos);
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pos += 2;
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if (end - pos < num_suites)
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goto decode_error;
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wpa_hexdump(MSG_MSGDUMP, "TLSv1: client cipher suites",
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pos, num_suites);
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if (num_suites & 1)
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goto decode_error;
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num_suites /= 2;
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cipher_suite = 0;
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for (i = 0; !cipher_suite && i < conn->num_cipher_suites; i++) {
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c = pos;
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for (j = 0; j < num_suites; j++) {
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u16 tmp = WPA_GET_BE16(c);
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c += 2;
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if (!cipher_suite && tmp == conn->cipher_suites[i]) {
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cipher_suite = tmp;
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break;
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}
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}
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}
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pos += num_suites * 2;
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if (!cipher_suite) {
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wpa_printf(MSG_INFO, "TLSv1: No supported cipher suite "
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"available");
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tlsv1_server_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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tlsv1_server_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->cipher_suite = cipher_suite;
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/* CompressionMethod compression_methods<1..2^8-1> */
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if (end - pos < 1)
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goto decode_error;
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num_suites = *pos++;
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if (end - pos < num_suites)
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goto decode_error;
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wpa_hexdump(MSG_MSGDUMP, "TLSv1: client compression_methods",
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pos, num_suites);
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compr_null_found = 0;
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for (i = 0; i < num_suites; i++) {
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if (*pos++ == TLS_COMPRESSION_NULL)
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compr_null_found = 1;
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}
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if (!compr_null_found) {
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wpa_printf(MSG_INFO, "TLSv1: Client does not accept NULL "
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"compression");
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tlsv1_server_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 (end - pos == 1) {
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wpa_printf(MSG_DEBUG, "TLSv1: Unexpected extra octet in the "
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"end of ClientHello: 0x%02x", *pos);
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goto decode_error;
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}
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if (end - pos >= 2) {
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/* Extension client_hello_extension_list<0..2^16-1> */
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ext_len = WPA_GET_BE16(pos);
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pos += 2;
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wpa_printf(MSG_DEBUG, "TLSv1: %u bytes of ClientHello "
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"extensions", ext_len);
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if (end - pos != ext_len) {
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wpa_printf(MSG_DEBUG, "TLSv1: Invalid ClientHello "
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"extension list length %u (expected %u)",
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ext_len, (unsigned int) (end - pos));
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goto decode_error;
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}
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/*
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* struct {
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* ExtensionType extension_type (0..65535)
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* opaque extension_data<0..2^16-1>
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* } Extension;
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*/
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while (pos < end) {
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if (end - pos < 2) {
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wpa_printf(MSG_DEBUG, "TLSv1: Invalid "
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"extension_type field");
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goto decode_error;
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}
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ext_type = WPA_GET_BE16(pos);
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pos += 2;
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if (end - pos < 2) {
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wpa_printf(MSG_DEBUG, "TLSv1: Invalid "
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"extension_data length field");
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goto decode_error;
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}
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ext_len = WPA_GET_BE16(pos);
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pos += 2;
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if (end - pos < ext_len) {
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wpa_printf(MSG_DEBUG, "TLSv1: Invalid "
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"extension_data field");
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goto decode_error;
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}
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wpa_printf(MSG_DEBUG, "TLSv1: ClientHello Extension "
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"type %u", ext_type);
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wpa_hexdump(MSG_MSGDUMP, "TLSv1: ClientHello "
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"Extension data", pos, ext_len);
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if (ext_type == TLS_EXT_SESSION_TICKET) {
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os_free(conn->session_ticket);
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conn->session_ticket = os_malloc(ext_len);
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if (conn->session_ticket) {
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os_memcpy(conn->session_ticket, pos,
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ext_len);
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conn->session_ticket_len = ext_len;
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}
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}
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pos += ext_len;
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}
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}
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*in_len = end - in_data;
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wpa_printf(MSG_DEBUG, "TLSv1: ClientHello OK - proceed to "
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"ServerHello");
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conn->state = SERVER_HELLO;
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return 0;
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decode_error:
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wpa_printf(MSG_DEBUG, "TLSv1: Failed to decode ClientHello");
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tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
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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_server *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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tlsv1_server_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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tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
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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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tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
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TLS_ALERT_DECODE_ERROR);
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return -1;
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}
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if (type == TLS_HANDSHAKE_TYPE_CLIENT_KEY_EXCHANGE) {
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if (conn->verify_peer) {
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wpa_printf(MSG_DEBUG, "TLSv1: Client did not include "
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"Certificate");
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tlsv1_server_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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return tls_process_client_key_exchange(conn, ct, in_data,
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in_len);
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}
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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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"ClientKeyExchange)", type);
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tlsv1_server_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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tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
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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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tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
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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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tlsv1_server_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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tlsv1_server_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->client_rsa_key);
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if (tls_parse_cert(pos, cert_len,
|
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&conn->client_rsa_key)) {
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wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
|
|
"the certificate");
|
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tlsv1_server_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);
|
|
if (cert == NULL) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
|
|
"the certificate");
|
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tlsv1_server_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;
|
|
|
|
idx++;
|
|
pos += cert_len;
|
|
}
|
|
|
|
if (x509_certificate_chain_validate(conn->cred->trusted_certs, chain,
|
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&reason, 0) < 0) {
|
|
int tls_reason;
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Server certificate chain "
|
|
"validation failed (reason=%d)", reason);
|
|
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;
|
|
break;
|
|
case X509_VALIDATE_CERTIFICATE_REVOKED:
|
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tls_reason = TLS_ALERT_CERTIFICATE_REVOKED;
|
|
break;
|
|
case X509_VALIDATE_CERTIFICATE_EXPIRED:
|
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tls_reason = TLS_ALERT_CERTIFICATE_EXPIRED;
|
|
break;
|
|
case X509_VALIDATE_CERTIFICATE_UNKNOWN:
|
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tls_reason = TLS_ALERT_CERTIFICATE_UNKNOWN;
|
|
break;
|
|
case X509_VALIDATE_UNKNOWN_CA:
|
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tls_reason = TLS_ALERT_UNKNOWN_CA;
|
|
break;
|
|
default:
|
|
tls_reason = TLS_ALERT_BAD_CERTIFICATE;
|
|
break;
|
|
}
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL, tls_reason);
|
|
x509_certificate_chain_free(chain);
|
|
return -1;
|
|
}
|
|
|
|
x509_certificate_chain_free(chain);
|
|
|
|
*in_len = end - in_data;
|
|
|
|
conn->state = CLIENT_KEY_EXCHANGE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_client_key_exchange_rsa(
|
|
struct tlsv1_server *conn, const u8 *pos, const u8 *end)
|
|
{
|
|
u8 *out;
|
|
size_t outlen, outbuflen;
|
|
u16 encr_len;
|
|
int res;
|
|
int use_random = 0;
|
|
|
|
if (end - pos < 2) {
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
encr_len = WPA_GET_BE16(pos);
|
|
pos += 2;
|
|
if (pos + encr_len > end) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Invalid ClientKeyExchange "
|
|
"format: encr_len=%u left=%u",
|
|
encr_len, (unsigned int) (end - pos));
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
outbuflen = outlen = end - pos;
|
|
out = os_malloc(outlen >= TLS_PRE_MASTER_SECRET_LEN ?
|
|
outlen : TLS_PRE_MASTER_SECRET_LEN);
|
|
if (out == NULL) {
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* struct {
|
|
* ProtocolVersion client_version;
|
|
* opaque random[46];
|
|
* } PreMasterSecret;
|
|
*
|
|
* struct {
|
|
* public-key-encrypted PreMasterSecret pre_master_secret;
|
|
* } EncryptedPreMasterSecret;
|
|
*/
|
|
|
|
/*
|
|
* Note: To avoid Bleichenbacher attack, we do not report decryption or
|
|
* parsing errors from EncryptedPreMasterSecret processing to the
|
|
* client. Instead, a random pre-master secret is used to force the
|
|
* handshake to fail.
|
|
*/
|
|
|
|
if (crypto_private_key_decrypt_pkcs1_v15(conn->cred->key,
|
|
pos, encr_len,
|
|
out, &outlen) < 0) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Failed to decrypt "
|
|
"PreMasterSecret (encr_len=%u outlen=%lu)",
|
|
encr_len, (unsigned long) outlen);
|
|
use_random = 1;
|
|
}
|
|
|
|
if (!use_random && outlen != TLS_PRE_MASTER_SECRET_LEN) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected PreMasterSecret "
|
|
"length %lu", (unsigned long) outlen);
|
|
use_random = 1;
|
|
}
|
|
|
|
if (!use_random && WPA_GET_BE16(out) != conn->client_version) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Client version in "
|
|
"ClientKeyExchange does not match with version in "
|
|
"ClientHello");
|
|
use_random = 1;
|
|
}
|
|
|
|
if (use_random) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Using random premaster secret "
|
|
"to avoid revealing information about private key");
|
|
outlen = TLS_PRE_MASTER_SECRET_LEN;
|
|
if (os_get_random(out, outlen)) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Failed to get random "
|
|
"data");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
os_free(out);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
res = tlsv1_server_derive_keys(conn, out, outlen);
|
|
|
|
/* Clear the pre-master secret since it is not needed anymore */
|
|
os_memset(out, 0, outbuflen);
|
|
os_free(out);
|
|
|
|
if (res) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive keys");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_client_key_exchange_dh_anon(
|
|
struct tlsv1_server *conn, const u8 *pos, const u8 *end)
|
|
{
|
|
const u8 *dh_yc;
|
|
u16 dh_yc_len;
|
|
u8 *shared;
|
|
size_t shared_len;
|
|
int res;
|
|
|
|
/*
|
|
* struct {
|
|
* select (PublicValueEncoding) {
|
|
* case implicit: struct { };
|
|
* case explicit: opaque dh_Yc<1..2^16-1>;
|
|
* } dh_public;
|
|
* } ClientDiffieHellmanPublic;
|
|
*/
|
|
|
|
wpa_hexdump(MSG_MSGDUMP, "TLSv1: ClientDiffieHellmanPublic",
|
|
pos, end - pos);
|
|
|
|
if (end == pos) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Implicit public value encoding "
|
|
"not supported");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
if (end - pos < 3) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Invalid client public value "
|
|
"length");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
dh_yc_len = WPA_GET_BE16(pos);
|
|
dh_yc = pos + 2;
|
|
|
|
if (dh_yc + dh_yc_len > end) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Client public value overflow "
|
|
"(length %d)", dh_yc_len);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
wpa_hexdump(MSG_DEBUG, "TLSv1: DH Yc (client's public value)",
|
|
dh_yc, dh_yc_len);
|
|
|
|
if (conn->cred == NULL || conn->cred->dh_p == NULL ||
|
|
conn->dh_secret == NULL) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: No DH parameters available");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
shared_len = conn->cred->dh_p_len;
|
|
shared = os_malloc(shared_len);
|
|
if (shared == NULL) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Could not allocate memory for "
|
|
"DH");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
/* shared = Yc^secret mod p */
|
|
if (crypto_mod_exp(dh_yc, dh_yc_len, conn->dh_secret,
|
|
conn->dh_secret_len,
|
|
conn->cred->dh_p, conn->cred->dh_p_len,
|
|
shared, &shared_len)) {
|
|
os_free(shared);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "TLSv1: Shared secret from DH key exchange",
|
|
shared, shared_len);
|
|
|
|
os_memset(conn->dh_secret, 0, conn->dh_secret_len);
|
|
os_free(conn->dh_secret);
|
|
conn->dh_secret = NULL;
|
|
|
|
res = tlsv1_server_derive_keys(conn, shared, shared_len);
|
|
|
|
/* Clear the pre-master secret since it is not needed anymore */
|
|
os_memset(shared, 0, shared_len);
|
|
os_free(shared);
|
|
|
|
if (res) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive keys");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_client_key_exchange(struct tlsv1_server *conn, u8 ct,
|
|
const u8 *in_data, size_t *in_len)
|
|
{
|
|
const u8 *pos, *end;
|
|
size_t left, len;
|
|
u8 type;
|
|
tls_key_exchange keyx;
|
|
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);
|
|
tlsv1_server_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 ClientKeyExchange "
|
|
"(Left=%lu)", (unsigned long) left);
|
|
tlsv1_server_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 ClientKeyExchange "
|
|
"length (len=%lu != left=%lu)",
|
|
(unsigned long) len, (unsigned long) left);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
end = pos + len;
|
|
|
|
if (type != TLS_HANDSHAKE_TYPE_CLIENT_KEY_EXCHANGE) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
|
|
"message %d (expected ClientKeyExchange)", type);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received ClientKeyExchange");
|
|
|
|
wpa_hexdump(MSG_DEBUG, "TLSv1: ClientKeyExchange", pos, len);
|
|
|
|
suite = tls_get_cipher_suite(conn->rl.cipher_suite);
|
|
if (suite == NULL)
|
|
keyx = TLS_KEY_X_NULL;
|
|
else
|
|
keyx = suite->key_exchange;
|
|
|
|
if (keyx == TLS_KEY_X_DH_anon &&
|
|
tls_process_client_key_exchange_dh_anon(conn, pos, end) < 0)
|
|
return -1;
|
|
|
|
if (keyx != TLS_KEY_X_DH_anon &&
|
|
tls_process_client_key_exchange_rsa(conn, pos, end) < 0)
|
|
return -1;
|
|
|
|
*in_len = end - in_data;
|
|
|
|
conn->state = CERTIFICATE_VERIFY;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_certificate_verify(struct tlsv1_server *conn, u8 ct,
|
|
const u8 *in_data, size_t *in_len)
|
|
{
|
|
const u8 *pos, *end;
|
|
size_t left, len;
|
|
u8 type;
|
|
size_t hlen, buflen;
|
|
u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN], *hpos, *buf;
|
|
enum { SIGN_ALG_RSA, SIGN_ALG_DSA } alg = SIGN_ALG_RSA;
|
|
u16 slen;
|
|
|
|
if (ct == TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC) {
|
|
if (conn->verify_peer) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Client did not include "
|
|
"CertificateVerify");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
return tls_process_change_cipher_spec(conn, ct, in_data,
|
|
in_len);
|
|
}
|
|
|
|
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
|
|
"received content type 0x%x", ct);
|
|
tlsv1_server_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 CertificateVerify "
|
|
"message (len=%lu)", (unsigned long) left);
|
|
tlsv1_server_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: Unexpected CertificateVerify "
|
|
"message length (len=%lu != left=%lu)",
|
|
(unsigned long) len, (unsigned long) left);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
end = pos + len;
|
|
|
|
if (type != TLS_HANDSHAKE_TYPE_CERTIFICATE_VERIFY) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
|
|
"message %d (expected CertificateVerify)", type);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_UNEXPECTED_MESSAGE);
|
|
return -1;
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Received CertificateVerify");
|
|
|
|
/*
|
|
* struct {
|
|
* Signature signature;
|
|
* } CertificateVerify;
|
|
*/
|
|
|
|
hpos = hash;
|
|
|
|
#ifdef CONFIG_TLSV12
|
|
if (conn->rl.tls_version == TLS_VERSION_1_2) {
|
|
/*
|
|
* 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) {
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
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]);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
pos += 2;
|
|
|
|
hlen = SHA256_MAC_LEN;
|
|
if (conn->verify.sha256_cert == NULL ||
|
|
fast_crypto_hash_finish(conn->verify.sha256_cert, hpos, &hlen) <
|
|
0) {
|
|
conn->verify.sha256_cert = NULL;
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
conn->verify.sha256_cert = NULL;
|
|
} else {
|
|
#endif /* CONFIG_TLSV12 */
|
|
|
|
if (alg == SIGN_ALG_RSA) {
|
|
hlen = MD5_MAC_LEN;
|
|
if (conn->verify.md5_cert == NULL ||
|
|
crypto_hash_finish(conn->verify.md5_cert, hpos, &hlen) < 0)
|
|
{
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
conn->verify.md5_cert = NULL;
|
|
crypto_hash_finish(conn->verify.sha1_cert, NULL, NULL);
|
|
conn->verify.sha1_cert = NULL;
|
|
return -1;
|
|
}
|
|
hpos += MD5_MAC_LEN;
|
|
} else
|
|
crypto_hash_finish(conn->verify.md5_cert, NULL, NULL);
|
|
|
|
conn->verify.md5_cert = NULL;
|
|
hlen = SHA1_MAC_LEN;
|
|
if (conn->verify.sha1_cert == NULL ||
|
|
crypto_hash_finish(conn->verify.sha1_cert, hpos, &hlen) < 0) {
|
|
conn->verify.sha1_cert = NULL;
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
conn->verify.sha1_cert = NULL;
|
|
|
|
if (alg == SIGN_ALG_RSA)
|
|
hlen += MD5_MAC_LEN;
|
|
|
|
#ifdef CONFIG_TLSV12
|
|
}
|
|
#endif /* CONFIG_TLSV12 */
|
|
|
|
wpa_hexdump(MSG_MSGDUMP, "TLSv1: CertificateVerify hash", hash, hlen);
|
|
|
|
if (end - pos < 2) {
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
slen = WPA_GET_BE16(pos);
|
|
pos += 2;
|
|
if (end - pos < slen) {
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECODE_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
wpa_hexdump(MSG_MSGDUMP, "TLSv1: Signature", pos, end - pos);
|
|
if (conn->client_rsa_key == NULL) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: No client public key to verify "
|
|
"signature");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
buflen = end - pos;
|
|
buf = os_malloc(end - pos);
|
|
if (crypto_public_key_decrypt_pkcs1(conn->client_rsa_key,
|
|
pos, end - pos, buf, &buflen) < 0)
|
|
{
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Failed to decrypt signature");
|
|
os_free(buf);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECRYPT_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: Decrypted Signature",
|
|
buf, buflen);
|
|
|
|
#ifdef CONFIG_TLSV12
|
|
if (conn->rl.tls_version >= TLS_VERSION_1_2) {
|
|
/*
|
|
* RFC 3447, A.2.4 RSASSA-PKCS1-v1_5
|
|
*
|
|
* DigestInfo ::= SEQUENCE {
|
|
* digestAlgorithm DigestAlgorithm,
|
|
* digest OCTET STRING
|
|
* }
|
|
*
|
|
* SHA-256 OID: sha256WithRSAEncryption ::= {pkcs-1 11}
|
|
*
|
|
* DER encoded DigestInfo for SHA256 per RFC 3447:
|
|
* 30 31 30 0d 06 09 60 86 48 01 65 03 04 02 01 05 00 04 20 ||
|
|
* H
|
|
*/
|
|
if (buflen >= 19 + 32 &&
|
|
os_memcmp(buf, "\x30\x31\x30\x0d\x06\x09\x60\x86\x48\x01"
|
|
"\x65\x03\x04\x02\x01\x05\x00\x04\x20", 19) == 0)
|
|
{
|
|
wpa_printf(MSG_DEBUG, "TLSv1.2: DigestAlgorithn = "
|
|
"SHA-256");
|
|
os_memmove(buf, buf + 19, buflen - 19);
|
|
buflen -= 19;
|
|
} else {
|
|
wpa_printf(MSG_DEBUG, "TLSv1.2: Unrecognized "
|
|
"DigestInfo");
|
|
os_free(buf);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECRYPT_ERROR);
|
|
return -1;
|
|
}
|
|
}
|
|
#endif /* CONFIG_TLSV12 */
|
|
|
|
if (buflen != hlen || os_memcmp(buf, hash, buflen) != 0) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Invalid Signature in "
|
|
"CertificateVerify - did not match with calculated "
|
|
"hash");
|
|
os_free(buf);
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECRYPT_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
os_free(buf);
|
|
|
|
*in_len = end - in_data;
|
|
|
|
conn->state = CHANGE_CIPHER_SPEC;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_change_cipher_spec(struct tlsv1_server *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);
|
|
tlsv1_server_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");
|
|
tlsv1_server_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);
|
|
tlsv1_server_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");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
*in_len = pos + 1 - in_data;
|
|
|
|
conn->state = CLIENT_FINISHED;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int tls_process_client_finished(struct tlsv1_server *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);
|
|
tlsv1_server_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);
|
|
tlsv1_server_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]);
|
|
tlsv1_server_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);
|
|
tlsv1_server_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);
|
|
tlsv1_server_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_client == NULL ||
|
|
crypto_hash_finish(conn->verify.sha256_client, hash, &hlen)
|
|
< 0) {
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
conn->verify.sha256_client = NULL;
|
|
return -1;
|
|
}
|
|
conn->verify.sha256_client = NULL;
|
|
} else {
|
|
#endif /* CONFIG_TLSV12 */
|
|
|
|
hlen = MD5_MAC_LEN;
|
|
if (conn->verify.md5_client == NULL ||
|
|
crypto_hash_finish(conn->verify.md5_client, hash, &hlen) < 0) {
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
conn->verify.md5_client = NULL;
|
|
crypto_hash_finish(conn->verify.sha1_client, NULL, NULL);
|
|
conn->verify.sha1_client = NULL;
|
|
return -1;
|
|
}
|
|
conn->verify.md5_client = NULL;
|
|
hlen = SHA1_MAC_LEN;
|
|
if (conn->verify.sha1_client == NULL ||
|
|
crypto_hash_finish(conn->verify.sha1_client, hash + MD5_MAC_LEN,
|
|
&hlen) < 0) {
|
|
conn->verify.sha1_client = NULL;
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
conn->verify.sha1_client = 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,
|
|
"client finished", hash, hlen,
|
|
verify_data, TLS_VERIFY_DATA_LEN)) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive verify_data");
|
|
tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL,
|
|
TLS_ALERT_DECRYPT_ERROR);
|
|
return -1;
|
|
}
|
|
wpa_hexdump_key(MSG_DEBUG, "TLSv1: verify_data (client)",
|
|
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;
|
|
|
|
if (conn->use_session_ticket) {
|
|
/* Abbreviated handshake using session ticket; RFC 4507 */
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Abbreviated handshake completed "
|
|
"successfully");
|
|
conn->state = ESTABLISHED;
|
|
} else {
|
|
/* Full handshake */
|
|
conn->state = SERVER_CHANGE_CIPHER_SPEC;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int tlsv1_server_process_handshake(struct tlsv1_server *conn, u8 ct,
|
|
const u8 *buf, size_t *len)
|
|
{
|
|
if (ct == TLS_CONTENT_TYPE_ALERT) {
|
|
if (*len < 2) {
|
|
wpa_printf(MSG_DEBUG, "TLSv1: Alert underflow");
|
|
tlsv1_server_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;
|
|
}
|
|
|
|
switch (conn->state) {
|
|
case CLIENT_HELLO:
|
|
if (tls_process_client_hello(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case CLIENT_CERTIFICATE:
|
|
if (tls_process_certificate(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case CLIENT_KEY_EXCHANGE:
|
|
if (tls_process_client_key_exchange(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case CERTIFICATE_VERIFY:
|
|
if (tls_process_certificate_verify(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case CHANGE_CIPHER_SPEC:
|
|
if (tls_process_change_cipher_spec(conn, ct, buf, len))
|
|
return -1;
|
|
break;
|
|
case CLIENT_FINISHED:
|
|
if (tls_process_client_finished(conn, ct, buf, 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;
|
|
}
|