mirror of
https://github.com/guanzhi/GmSSL.git
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6a5eef05d5
Example of `tlcp_client` ``` $ gmssl tlcp_client -host ebssec.boc.cn Connection established! GET / HTTP/1.1[enter] Host: localhost[enter] [enter] [enter] ```
1057 lines
34 KiB
C
1057 lines
34 KiB
C
/*
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* Copyright (c) 2021 - 2021 The GmSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the GmSSL Project.
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* (http://gmssl.org/)"
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*
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* 4. The name "GmSSL Project" must not be used to endorse or promote
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* products derived from this software without prior written
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* permission. For written permission, please contact
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* guanzhi1980@gmail.com.
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*
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* 5. Products derived from this software may not be called "GmSSL"
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* nor may "GmSSL" appear in their names without prior written
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* permission of the GmSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the GmSSL Project
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* (http://gmssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <time.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <gmssl/rand.h>
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#include <gmssl/x509.h>
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#include <gmssl/error.h>
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#include <gmssl/mem.h>
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#include <gmssl/sm2.h>
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#include <gmssl/sm3.h>
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#include <gmssl/sm4.h>
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#include <gmssl/pem.h>
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#include <gmssl/tls.h>
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static const int tlcp_ciphers[] = { TLS_cipher_ecc_sm4_cbc_sm3 };
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static const size_t tlcp_ciphers_count = sizeof(tlcp_ciphers)/sizeof(tlcp_ciphers[0]);
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int tlcp_record_print(FILE *fp, const uint8_t *record, size_t recordlen, int format, int indent)
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{
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// 目前只支持TLCP的ECC公钥加密套件，因此不论用哪个套件解析都是一样的
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// 如果未来支持ECDHE套件，可以将函数改为宏，直接传入 (conn->cipher_suite << 8)
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format |= tlcp_ciphers[0] << 8;
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return tls_record_print(fp, record, recordlen, format, indent);
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}
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int tlcp_record_set_handshake_server_key_exchange_pke(uint8_t *record, size_t *recordlen,
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const uint8_t *sig, size_t siglen)
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{
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int type = TLS_handshake_server_key_exchange;
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uint8_t *p;
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size_t len = 0;
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if (!record || !recordlen || !sig || !siglen) {
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error_print();
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return -1;
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}
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if (siglen > SM2_MAX_SIGNATURE_SIZE) {
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error_print();
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return -1;
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}
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if (tls_record_protocol(record) != TLS_protocol_tlcp) {
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error_print();
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return -1;
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}
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p = tls_handshake_data(tls_record_data(record));
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// 注意TLCP的ServerKeyExchange中的签名值需要封装在uint16array中
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// 但是CertificateVerify中直接装载签名值DER
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tls_uint16array_to_bytes(sig, siglen, &p, &len);
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tls_record_set_handshake(record, recordlen, type, NULL, len);
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return 1;
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}
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int tlcp_record_get_handshake_server_key_exchange_pke(const uint8_t *record,
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const uint8_t **sig, size_t *siglen)
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{
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int type;
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const uint8_t *p;
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size_t len;
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if (!record || !sig || !siglen) {
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error_print();
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return -1;
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}
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if (tls_record_get_handshake(record, &type, &p, &len) != 1) {
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error_print();
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return -1;
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}
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if (type != TLS_handshake_server_key_exchange) {
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error_print();
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return -1;
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}
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if (tls_record_protocol(record) != TLS_protocol_tlcp) {
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error_print();
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return -1;
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}
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if (tls_uint16array_from_bytes(sig, siglen, &p, &len) != 1) {
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error_print();
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return -1;
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}
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if (len) {
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error_print();
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return -1;
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}
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return 1;
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}
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int tlcp_server_key_exchange_pke_print(FILE *fp, const uint8_t *data, size_t datalen, int format, int indent)
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{
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const uint8_t *sig;
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size_t siglen;
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format_print(fp, format, indent, "ServerKeyExchange\n");
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indent += 4;
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if (tls_uint16array_from_bytes(&sig, &siglen, &data, &datalen) != 1) {
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error_print();
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return -1;
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}
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format_bytes(fp, format, indent, "signature", sig, siglen);
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if (datalen) {
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error_print();
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return -1;
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}
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return 1;
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}
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int tlcp_do_connect(TLS_CONNECT *conn)
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{
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int ret = -1;
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uint8_t *record = conn->record;
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uint8_t finished_record[TLS_FINISHED_RECORD_BUF_SIZE];
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size_t recordlen, finished_record_len;
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uint8_t client_random[32];
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uint8_t server_random[32];
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int protocol;
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int cipher_suite;
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const uint8_t *random;
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const uint8_t *session_id;
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size_t session_id_len;
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const uint8_t *exts;
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size_t exts_len;
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SM2_KEY server_sign_key;
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SM2_KEY server_enc_key;
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SM2_SIGN_CTX verify_ctx;
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SM2_SIGN_CTX sign_ctx;
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const uint8_t *sig;
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size_t siglen;
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uint8_t pre_master_secret[48];
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uint8_t enced_pre_master_secret[SM2_MAX_CIPHERTEXT_SIZE];
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size_t enced_pre_master_secret_len;
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SM3_CTX sm3_ctx;
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SM3_CTX tmp_sm3_ctx;
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uint8_t sm3_hash[32];
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const uint8_t *verify_data;
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size_t verify_data_len;
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uint8_t local_verify_data[12];
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int handshake_type;
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const uint8_t *server_enc_cert;
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size_t server_enc_cert_len;
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uint8_t server_enc_cert_lenbuf[3];
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const uint8_t *cp;
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uint8_t *p;
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size_t len;
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int depth = 5;
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int alert = 0;
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int verify_result;
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// 初始化记录缓冲
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tls_record_set_protocol(record, TLS_protocol_tlcp);
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tls_record_set_protocol(finished_record, TLS_protocol_tlcp);
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// 准备Finished Context（和ClientVerify）
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sm3_init(&sm3_ctx);
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if (conn->client_certs_len)
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sm2_sign_init(&sign_ctx, &conn->sign_key, SM2_DEFAULT_ID, SM2_DEFAULT_ID_LENGTH);
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// send ClientHello
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tls_random_generate(client_random);
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if (tls_record_set_handshake_client_hello(record, &recordlen,
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TLS_protocol_tlcp, client_random, NULL, 0,
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tlcp_ciphers, tlcp_ciphers_count, NULL, 0) != 1) {
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error_print();
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goto end;
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}
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tls_trace("send ClientHello\n");
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tlcp_record_trace(stderr, record, recordlen, 0, 0);
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if (tls_record_send(record, recordlen, conn->sock) != 1) {
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error_print();
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goto end;
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}
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sm3_update(&sm3_ctx, record + 5, recordlen - 5);
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if (conn->client_certs_len)
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sm2_sign_update(&sign_ctx, record + 5, recordlen - 5);
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// recv ServerHello
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tls_trace("recv ServerHello\n");
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if (tls_record_recv(record, &recordlen, conn->sock) != 1) {
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error_print();
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tls_send_alert(conn, TLS_alert_unexpected_message);
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goto end;
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}
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tlcp_record_trace(stderr, record, recordlen, 0, 0);
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if (tls_record_protocol(record) != TLS_protocol_tlcp) {
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error_print();
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tls_send_alert(conn, TLS_alert_protocol_version);
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goto end;
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}
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if (tls_record_get_handshake_server_hello(record,
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&protocol, &random, &session_id, &session_id_len, &cipher_suite,
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&exts, &exts_len) != 1) {
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error_print();
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tls_send_alert(conn, TLS_alert_unexpected_message);
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goto end;
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}
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if (protocol != TLS_protocol_tlcp) {
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tls_send_alert(conn, TLS_alert_protocol_version);
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error_print();
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goto end;
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}
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if (tls_cipher_suite_in_list(cipher_suite, tlcp_ciphers, tlcp_ciphers_count) != 1) {
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tls_send_alert(conn, TLS_alert_handshake_failure);
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error_print();
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goto end;
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}
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if (exts) {
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error_print();
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tls_send_alert(conn, TLS_alert_unexpected_message);
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goto end;
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}
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memcpy(server_random, random, 32);
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memcpy(conn->session_id, session_id, session_id_len);
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conn->cipher_suite = cipher_suite;
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sm3_update(&sm3_ctx, record + 5, recordlen - 5);
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if (conn->client_certs_len)
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sm2_sign_update(&sign_ctx, record + 5, recordlen - 5);
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// recv ServerCertificate
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tls_trace("recv ServerCertificate\n");
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if (tls_record_recv(record, &recordlen, conn->sock) != 1
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|| tls_record_protocol(record) != TLS_protocol_tlcp) {
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error_print();
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tls_send_alert(conn, TLS_alert_unexpected_message);
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goto end;
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}
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tlcp_record_trace(stderr, record, recordlen, 0, 0);
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if (tls_record_get_handshake_certificate(record,
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conn->server_certs, &conn->server_certs_len) != 1) {
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error_print();
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tls_send_alert(conn, TLS_alert_unexpected_message);
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goto end;
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}
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sm3_update(&sm3_ctx, record + 5, recordlen - 5);
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if (conn->client_certs_len)
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sm2_sign_update(&sign_ctx, record + 5, recordlen - 5);
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// verify ServerCertificate
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if (conn->ca_certs_len) {
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// 只有提供了CA证书才验证服务器证书链
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// FIXME: 逻辑需要再检查
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if (x509_certs_verify_tlcp(conn->server_certs, conn->server_certs_len,
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conn->ca_certs, conn->ca_certs_len, depth, &verify_result) != 1) {
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error_print();
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tls_send_alert(conn, alert);
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goto end;
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}
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}
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// recv ServerKeyExchange
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tls_trace("recv ServerKeyExchange\n");
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if (tls_record_recv(record, &recordlen, conn->sock) != 1
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|| tls_record_protocol(record) != TLS_protocol_tlcp) {
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error_print();
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tls_send_alert(conn, TLS_alert_unexpected_message);
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goto end;
|
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}
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tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
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if (tlcp_record_get_handshake_server_key_exchange_pke(record, &sig, &siglen) != 1) {
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error_print();
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tls_send_alert(conn, TLS_alert_unexpected_message);
|
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goto end;
|
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}
|
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sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
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if (conn->client_certs_len)
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sm2_sign_update(&sign_ctx, record + 5, recordlen - 5);
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|
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// verify ServerKeyExchange
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if (x509_certs_get_cert_by_index(conn->server_certs, conn->server_certs_len, 0, &cp, &len) != 1
|
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|| x509_cert_get_subject_public_key(cp, len, &server_sign_key) != 1
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|| x509_certs_get_cert_by_index(conn->server_certs, conn->server_certs_len, 1, &server_enc_cert, &server_enc_cert_len) != 1
|
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|| x509_cert_get_subject_public_key(server_enc_cert, server_enc_cert_len, &server_enc_key) != 1) {
|
||
error_print();
|
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tls_send_alert(conn, TLS_alert_bad_certificate);
|
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goto end;
|
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}
|
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p = server_enc_cert_lenbuf; len = 0;
|
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tls_uint24_to_bytes(server_enc_cert_len, &p, &len);
|
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if (sm2_verify_init(&verify_ctx, &server_sign_key, SM2_DEFAULT_ID, SM2_DEFAULT_ID_LENGTH) != 1
|
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|| sm2_verify_update(&verify_ctx, client_random, 32) != 1
|
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|| sm2_verify_update(&verify_ctx, server_random, 32) != 1
|
||
|| sm2_verify_update(&verify_ctx, server_enc_cert_lenbuf, 3) != 1
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||
|| sm2_verify_update(&verify_ctx, server_enc_cert, server_enc_cert_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
if (sm2_verify_finish(&verify_ctx, sig, siglen) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_decrypt_error);
|
||
goto end;
|
||
}
|
||
|
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// recv CertificateRequest or ServerHelloDone
|
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if (tls_record_recv(record, &recordlen, conn->sock) != 1
|
||
|| tls_record_protocol(record) != TLS_protocol_tlcp
|
||
|| tls_record_get_handshake(record, &handshake_type, &cp, &len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
if (handshake_type == TLS_handshake_certificate_request) {
|
||
const uint8_t *cert_types;
|
||
size_t cert_types_len;
|
||
const uint8_t *ca_names;
|
||
size_t ca_names_len;
|
||
|
||
// recv CertificateRequest
|
||
tls_trace("recv CertificateRequest\n");
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_get_handshake_certificate_request(record,
|
||
&cert_types, &cert_types_len, &ca_names, &ca_names_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
if(!conn->client_certs_len) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
if (tls_cert_types_accepted(cert_types, cert_types_len, conn->client_certs, conn->client_certs_len) != 1
|
||
|| tls_authorities_issued_certificate(ca_names, ca_names_len, conn->client_certs, conn->client_certs_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unsupported_certificate);
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
sm2_sign_update(&sign_ctx, record + 5, recordlen - 5);
|
||
|
||
// recv ServerHelloDone
|
||
if (tls_record_recv(record, &recordlen, conn->sock) != 1
|
||
|| tls_record_protocol(record) != TLS_protocol_tlcp) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
} else {
|
||
// 这个得处理一下
|
||
conn->client_certs_len = 0;
|
||
gmssl_secure_clear(&conn->sign_key, sizeof(SM2_KEY));
|
||
//client_sign_key = NULL;
|
||
}
|
||
tls_trace("recv ServerHelloDone\n");
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_get_handshake_server_hello_done(record) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
if (conn->client_certs_len)
|
||
sm2_sign_update(&sign_ctx, record + 5, recordlen - 5);
|
||
|
||
// send ClientCertificate
|
||
if (conn->client_certs_len) {
|
||
tls_trace("send ClientCertificate\n");
|
||
if (tls_record_set_handshake_certificate(record, &recordlen, conn->client_certs, conn->client_certs_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
sm2_sign_update(&sign_ctx, record + 5, recordlen - 5);
|
||
}
|
||
|
||
// generate MASTER_SECRET
|
||
tls_trace("generate secrets\n");
|
||
if (tls_pre_master_secret_generate(pre_master_secret, TLS_protocol_tlcp) != 1
|
||
|| tls_prf(pre_master_secret, 48, "master secret",
|
||
client_random, 32, server_random, 32,
|
||
48, conn->master_secret) != 1
|
||
|| tls_prf(conn->master_secret, 48, "key expansion",
|
||
server_random, 32, client_random, 32,
|
||
96, conn->key_block) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
sm3_hmac_init(&conn->client_write_mac_ctx, conn->key_block, 32);
|
||
sm3_hmac_init(&conn->server_write_mac_ctx, conn->key_block + 32, 32);
|
||
sm4_set_encrypt_key(&conn->client_write_enc_key, conn->key_block + 64);
|
||
sm4_set_decrypt_key(&conn->server_write_enc_key, conn->key_block + 80);
|
||
/*
|
||
tls_secrets_print(stderr,
|
||
pre_master_secret, 48,
|
||
client_random, server_random,
|
||
conn->master_secret,
|
||
conn->key_block, 96,
|
||
0, 4);
|
||
*/
|
||
|
||
// send ClientKeyExchange
|
||
tls_trace("send ClientKeyExchange\n");
|
||
if (sm2_encrypt(&server_enc_key, pre_master_secret, 48,
|
||
enced_pre_master_secret, &enced_pre_master_secret_len) != 1
|
||
|| tls_record_set_handshake_client_key_exchange_pke(record, &recordlen,
|
||
enced_pre_master_secret, enced_pre_master_secret_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
if (conn->client_certs_len)
|
||
sm2_sign_update(&sign_ctx, record + 5, recordlen - 5);
|
||
|
||
// send CertificateVerify
|
||
if (conn->client_certs_len) {
|
||
tls_trace("send CertificateVerify\n");
|
||
uint8_t sigbuf[SM2_MAX_SIGNATURE_SIZE];
|
||
if (sm2_sign_finish(&sign_ctx, sigbuf, &siglen) != 1
|
||
|| tls_record_set_handshake_certificate_verify(record, &recordlen, sigbuf, siglen) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
}
|
||
|
||
// send [ChangeCipherSpec]
|
||
tls_trace("send [ChangeCipherSpec]\n");
|
||
if (tls_record_set_change_cipher_spec(record, &recordlen) !=1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
|
||
// send Client Finished
|
||
tls_trace("send Finished\n");
|
||
memcpy(&tmp_sm3_ctx, &sm3_ctx, sizeof(sm3_ctx));
|
||
sm3_finish(&tmp_sm3_ctx, sm3_hash);
|
||
if (tls_prf(conn->master_secret, 48, "client finished",
|
||
sm3_hash, 32, NULL, 0, sizeof(local_verify_data), local_verify_data) != 1
|
||
|| tls_record_set_handshake_finished(finished_record, &finished_record_len,
|
||
local_verify_data, sizeof(local_verify_data)) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, finished_record, finished_record_len, 0, 0);
|
||
sm3_update(&sm3_ctx, finished_record + 5, finished_record_len - 5);
|
||
|
||
// encrypt Client Finished
|
||
tls_trace("encrypt Finished\n");
|
||
if (tls_record_encrypt(&conn->client_write_mac_ctx, &conn->client_write_enc_key,
|
||
conn->client_seq_num, finished_record, finished_record_len, record, &recordlen) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, (1<<24), 0); // 强制打印密文原数据
|
||
tls_seq_num_incr(conn->client_seq_num);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
|
||
// [ChangeCipherSpec]
|
||
tls_trace("recv [ChangeCipherSpec]\n");
|
||
if (tls_record_recv(record, &recordlen, conn->sock) != 1
|
||
|| tls_record_protocol(record) != TLS_protocol_tlcp) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_get_change_cipher_spec(record) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
|
||
// Finished
|
||
tls_trace("recv Finished\n");
|
||
if (tls_record_recv(record, &recordlen, conn->sock) != 1
|
||
|| tls_record_protocol(record) != TLS_protocol_tlcp) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
if (recordlen > sizeof(finished_record)) {
|
||
error_print(); // 解密可能导致 finished_record 溢出
|
||
tls_send_alert(conn, TLS_alert_bad_record_mac);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, (1<<24), 0); // 强制打印密文原数据
|
||
tls_trace("decrypt Finished\n");
|
||
if (tls_record_decrypt(&conn->server_write_mac_ctx, &conn->server_write_enc_key,
|
||
conn->server_seq_num, record, recordlen, finished_record, &finished_record_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_bad_record_mac);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, finished_record, finished_record_len, 0, 0);
|
||
tls_seq_num_incr(conn->server_seq_num);
|
||
if (tls_record_get_handshake_finished(finished_record, &verify_data, &verify_data_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
if (verify_data_len != sizeof(local_verify_data)) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
sm3_finish(&sm3_ctx, sm3_hash);
|
||
if (tls_prf(conn->master_secret, 48, "server finished",
|
||
sm3_hash, 32, NULL, 0, sizeof(local_verify_data), local_verify_data) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
if (memcmp(verify_data, local_verify_data, sizeof(local_verify_data)) != 0) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_decrypt_error);
|
||
goto end;
|
||
}
|
||
printf("Connection established!\n");
|
||
|
||
|
||
conn->protocol = TLS_protocol_tlcp;
|
||
conn->cipher_suite = cipher_suite;
|
||
|
||
ret = 1;
|
||
|
||
end:
|
||
gmssl_secure_clear(&sign_ctx, sizeof(sign_ctx));
|
||
gmssl_secure_clear(pre_master_secret, sizeof(pre_master_secret));
|
||
return 1;
|
||
}
|
||
|
||
int tlcp_do_accept(TLS_CONNECT *conn)
|
||
{
|
||
int ret = -1;
|
||
|
||
int client_verify = 0;
|
||
|
||
uint8_t *record = conn->record;
|
||
uint8_t finished_record[TLS_FINISHED_RECORD_BUF_SIZE]; // 解密可能导致前面的record被覆盖
|
||
size_t recordlen, finished_record_len;
|
||
const int server_ciphers[] = { TLS_cipher_ecc_sm4_cbc_sm3 }; // 未来应该支持GCM/CBC两个套件
|
||
|
||
// ClientHello, ServerHello
|
||
uint8_t client_random[32];
|
||
uint8_t server_random[32];
|
||
int protocol;
|
||
const uint8_t *random;
|
||
const uint8_t *session_id; // TLCP服务器忽略客户端SessionID，也不主动设置SessionID
|
||
size_t session_id_len;
|
||
const uint8_t *client_ciphers;
|
||
size_t client_ciphers_len;
|
||
const uint8_t *exts;
|
||
size_t exts_len;
|
||
|
||
// ServerKeyExchange
|
||
const uint8_t *server_enc_cert;
|
||
size_t server_enc_cert_len;
|
||
uint8_t server_enc_cert_lenbuf[3];
|
||
SM2_SIGN_CTX sign_ctx;
|
||
uint8_t sigbuf[SM2_MAX_SIGNATURE_SIZE];
|
||
size_t siglen;
|
||
|
||
// ClientCertificate, CertificateVerify
|
||
TLS_CLIENT_VERIFY_CTX client_verify_ctx;
|
||
SM2_KEY client_sign_key;
|
||
const uint8_t *sig;
|
||
const int verify_depth = 5;
|
||
int verify_result;
|
||
|
||
// ClientKeyExchange
|
||
const uint8_t *enced_pms;
|
||
size_t enced_pms_len;
|
||
uint8_t pre_master_secret[SM2_MAX_PLAINTEXT_SIZE]; // sm2_decrypt 保证输出不会溢出
|
||
size_t pre_master_secret_len;
|
||
|
||
// Finished
|
||
SM3_CTX sm3_ctx;
|
||
SM3_CTX tmp_sm3_ctx;
|
||
uint8_t sm3_hash[32];
|
||
uint8_t local_verify_data[12];
|
||
const uint8_t *verify_data;
|
||
size_t verify_data_len;
|
||
|
||
uint8_t *p;
|
||
const uint8_t *cp;
|
||
size_t len;
|
||
|
||
|
||
// 服务器端如果设置了CA
|
||
if (conn->ca_certs_len)
|
||
client_verify = 1;
|
||
|
||
// 初始化Finished和客户端验证环境
|
||
sm3_init(&sm3_ctx);
|
||
if (client_verify)
|
||
tls_client_verify_init(&client_verify_ctx);
|
||
|
||
|
||
// recv ClientHello
|
||
tls_trace("recv ClientHello\n");
|
||
if (tls_record_recv(record, &recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_protocol(record) != TLS_protocol_tlcp) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_protocol_version);
|
||
goto end;
|
||
}
|
||
if (tls_record_get_handshake_client_hello(record,
|
||
&protocol, &random, &session_id, &session_id_len,
|
||
&client_ciphers, &client_ciphers_len,
|
||
&exts, &exts_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
if (protocol != TLS_protocol_tlcp) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_protocol_version);
|
||
goto end;
|
||
}
|
||
memcpy(client_random, random, 32);
|
||
if (tls_cipher_suites_select(client_ciphers, client_ciphers_len,
|
||
server_ciphers, sizeof(server_ciphers)/sizeof(server_ciphers[0]),
|
||
&conn->cipher_suite) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_insufficient_security);
|
||
goto end;
|
||
}
|
||
if (exts) {
|
||
// 忽略客户端扩展错误可以兼容错误的TLCP客户端实现
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
if (client_verify)
|
||
tls_client_verify_update(&client_verify_ctx, record + 5, recordlen - 5);
|
||
|
||
|
||
// send ServerHello
|
||
tls_trace("send ServerHello\n");
|
||
tls_random_generate(server_random);
|
||
if (tls_record_set_handshake_server_hello(record, &recordlen,
|
||
TLS_protocol_tlcp, server_random, NULL, 0,
|
||
conn->cipher_suite, NULL, 0) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
if (client_verify)
|
||
tls_client_verify_update(&client_verify_ctx, record + 5, recordlen - 5);
|
||
|
||
// send ServerCertificate
|
||
tls_trace("send ServerCertificate\n");
|
||
if (tls_record_set_handshake_certificate(record, &recordlen,
|
||
conn->server_certs, conn->server_certs_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
if (client_verify)
|
||
tls_client_verify_update(&client_verify_ctx, record + 5, recordlen - 5);
|
||
|
||
// send ServerKeyExchange
|
||
tls_trace("send ServerKeyExchange\n");
|
||
if (x509_certs_get_cert_by_index(conn->server_certs, conn->server_certs_len, 1,
|
||
&server_enc_cert, &server_enc_cert_len) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
p = server_enc_cert_lenbuf; len = 0;
|
||
tls_uint24_to_bytes(server_enc_cert_len, &p, &len);
|
||
if (sm2_sign_init(&sign_ctx, &conn->sign_key, SM2_DEFAULT_ID, SM2_DEFAULT_ID_LENGTH) != 1
|
||
|| sm2_sign_update(&sign_ctx, client_random, 32) != 1
|
||
|| sm2_sign_update(&sign_ctx, server_random, 32) != 1
|
||
|| sm2_sign_update(&sign_ctx, server_enc_cert_lenbuf, 3) != 1
|
||
|| sm2_sign_update(&sign_ctx, server_enc_cert, server_enc_cert_len) != 1
|
||
|| sm2_sign_finish(&sign_ctx, sigbuf, &siglen) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
if (tlcp_record_set_handshake_server_key_exchange_pke(record, &recordlen, sigbuf, siglen) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
if (client_verify)
|
||
tls_client_verify_update(&client_verify_ctx, record + 5, recordlen - 5);
|
||
|
||
// send CertificateRequest
|
||
if (client_verify) {
|
||
const uint8_t cert_types[] = { TLS_cert_type_ecdsa_sign };
|
||
uint8_t ca_names[TLS_MAX_CA_NAMES_SIZE] = {0}; // TODO: 根据客户端验证CA证书列计算缓冲大小，或直接输出到record缓冲
|
||
size_t ca_names_len = 0;
|
||
|
||
tls_trace("send CertificateRequest\n");
|
||
if (tls_authorities_from_certs(ca_names, &ca_names_len, sizeof(ca_names),
|
||
conn->ca_certs, conn->ca_certs_len) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
if (tls_record_set_handshake_certificate_request(record, &recordlen,
|
||
cert_types, sizeof(cert_types),
|
||
ca_names, ca_names_len) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
tls_client_verify_update(&client_verify_ctx, record + 5, recordlen - 5);
|
||
}
|
||
|
||
// send ServerHelloDone
|
||
tls_trace("send ServerHelloDone\n");
|
||
tls_record_set_handshake_server_hello_done(record, &recordlen);
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
if (client_verify)
|
||
tls_client_verify_update(&client_verify_ctx, record + 5, recordlen - 5);
|
||
|
||
// recv ClientCertificate
|
||
if (conn->ca_certs_len) {
|
||
tls_trace("recv ClientCertificate\n");
|
||
if (tls_record_recv(record, &recordlen, conn->sock) != 1
|
||
|| tls_record_protocol(record) != TLS_protocol_tlcp) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_get_handshake_certificate(record, conn->client_certs, &conn->client_certs_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
if (x509_certs_verify(conn->client_certs, conn->client_certs_len,
|
||
conn->ca_certs, conn->ca_certs_len, verify_depth, &verify_result) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_bad_certificate);
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
tls_client_verify_update(&client_verify_ctx, record + 5, recordlen - 5);
|
||
}
|
||
|
||
// ClientKeyExchange
|
||
tls_trace("recv ClientKeyExchange\n");
|
||
if (tls_record_recv(record, &recordlen, conn->sock) != 1
|
||
|| tls_record_protocol(record) != TLS_protocol_tlcp) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_get_handshake_client_key_exchange_pke(record, &enced_pms, &enced_pms_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
if (sm2_decrypt(&conn->kenc_key, enced_pms, enced_pms_len,
|
||
pre_master_secret, &pre_master_secret_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_decrypt_error);
|
||
goto end;
|
||
}
|
||
if (pre_master_secret_len != 48) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_decrypt_error);
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
if (client_verify)
|
||
tls_client_verify_update(&client_verify_ctx, record + 5, recordlen - 5);
|
||
|
||
// recv CertificateVerify
|
||
if (client_verify) {
|
||
tls_trace("recv CertificateVerify\n");
|
||
if (tls_record_recv(record, &recordlen, conn->sock) != 1
|
||
|| tls_record_protocol(record) != TLS_protocol_tlcp) {
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
error_print();
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_get_handshake_certificate_verify(record, &sig, &siglen) != 1) {
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
error_print();
|
||
goto end;
|
||
}
|
||
if (x509_certs_get_cert_by_index(conn->client_certs, conn->client_certs_len, 0, &cp, &len) != 1
|
||
|| x509_cert_get_subject_public_key(cp, len, &client_sign_key) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_bad_certificate);
|
||
goto end;
|
||
}
|
||
if (tls_client_verify_finish(&client_verify_ctx, sig, siglen, &client_sign_key) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_decrypt_error);
|
||
goto end;
|
||
}
|
||
sm3_update(&sm3_ctx, record + 5, recordlen - 5);
|
||
}
|
||
|
||
// generate secrets
|
||
tls_trace("generate secrets\n");
|
||
if (tls_prf(pre_master_secret, 48, "master secret",
|
||
client_random, 32, server_random, 32,
|
||
48, conn->master_secret) != 1
|
||
|| tls_prf(conn->master_secret, 48, "key expansion",
|
||
server_random, 32, client_random, 32,
|
||
96, conn->key_block) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
sm3_hmac_init(&conn->client_write_mac_ctx, conn->key_block, 32);
|
||
sm3_hmac_init(&conn->server_write_mac_ctx, conn->key_block + 32, 32);
|
||
sm4_set_decrypt_key(&conn->client_write_enc_key, conn->key_block + 64);
|
||
sm4_set_encrypt_key(&conn->server_write_enc_key, conn->key_block + 80);
|
||
/*
|
||
tls_secrets_print(stderr,
|
||
pre_master_secret, 48,
|
||
client_random, server_random,
|
||
conn->master_secret,
|
||
conn->key_block, 96,
|
||
0, 4);
|
||
*/
|
||
|
||
// recv [ChangeCipherSpec]
|
||
tls_trace("recv [ChangeCipherSpec]\n");
|
||
if (tls_record_recv(record, &recordlen, conn->sock) != 1
|
||
|| tls_record_protocol(record) != TLS_protocol_tlcp) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_get_change_cipher_spec(record) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
|
||
// recv ClientFinished
|
||
tls_trace("recv Finished\n");
|
||
if (tls_record_recv(record, &recordlen, conn->sock) != 1
|
||
|| tls_record_protocol(record) != TLS_protocol_tlcp) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
if (recordlen > sizeof(finished_record)) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_unexpected_message);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, (1<<24), 0); // 强制打印密文原数据
|
||
|
||
// decrypt ClientFinished
|
||
tls_trace("decrypt Finished\n");
|
||
if (tls_record_decrypt(&conn->client_write_mac_ctx, &conn->client_write_enc_key,
|
||
conn->client_seq_num, record, recordlen, finished_record, &finished_record_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_bad_record_mac);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, finished_record, finished_record_len, 0, 0);
|
||
tls_seq_num_incr(conn->client_seq_num);
|
||
if (tls_record_get_handshake_finished(finished_record, &verify_data, &verify_data_len) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_bad_record_mac);
|
||
goto end;
|
||
}
|
||
if (verify_data_len != sizeof(local_verify_data)) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_bad_record_mac);
|
||
goto end;
|
||
}
|
||
|
||
// verify ClientFinished
|
||
memcpy(&tmp_sm3_ctx, &sm3_ctx, sizeof(SM3_CTX));
|
||
sm3_update(&sm3_ctx, finished_record + 5, finished_record_len - 5);
|
||
sm3_finish(&tmp_sm3_ctx, sm3_hash);
|
||
if (tls_prf(conn->master_secret, 48, "client finished", sm3_hash, 32, NULL, 0,
|
||
sizeof(local_verify_data), local_verify_data) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
if (memcmp(verify_data, local_verify_data, sizeof(local_verify_data)) != 0) {
|
||
error_puts("client_finished.verify_data verification failure");
|
||
tls_send_alert(conn, TLS_alert_decrypt_error);
|
||
goto end;
|
||
}
|
||
|
||
// send [ChangeCipherSpec]
|
||
tls_trace("send [ChangeCipherSpec]\n");
|
||
if (tls_record_set_change_cipher_spec(record, &recordlen) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, record, recordlen, 0, 0);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
|
||
// send ServerFinished
|
||
tls_trace("send Finished\n");
|
||
sm3_finish(&sm3_ctx, sm3_hash);
|
||
if (tls_prf(conn->master_secret, 48, "server finished", sm3_hash, 32, NULL, 0,
|
||
sizeof(local_verify_data), local_verify_data) != 1
|
||
|| tls_record_set_handshake_finished(finished_record, &finished_record_len,
|
||
local_verify_data, sizeof(local_verify_data)) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tlcp_record_trace(stderr, finished_record, finished_record_len, 0, 0);
|
||
if (tls_record_encrypt(&conn->server_write_mac_ctx, &conn->server_write_enc_key,
|
||
conn->server_seq_num, finished_record, finished_record_len, record, &recordlen) != 1) {
|
||
error_print();
|
||
tls_send_alert(conn, TLS_alert_internal_error);
|
||
goto end;
|
||
}
|
||
tls_trace("encrypt Finished\n");
|
||
tlcp_record_trace(stderr, record, recordlen, (1<<24), 0); // 强制打印密文原数据
|
||
tls_seq_num_incr(conn->server_seq_num);
|
||
if (tls_record_send(record, recordlen, conn->sock) != 1) {
|
||
error_print();
|
||
goto end;
|
||
}
|
||
|
||
conn->protocol = TLS_protocol_tlcp;
|
||
|
||
tls_trace("Connection Established!\n\n");
|
||
ret = 1;
|
||
|
||
end:
|
||
gmssl_secure_clear(&sign_ctx, sizeof(sign_ctx));
|
||
gmssl_secure_clear(pre_master_secret, sizeof(pre_master_secret));
|
||
if (client_verify) tls_client_verify_cleanup(&client_verify_ctx);
|
||
return ret;
|
||
}
|