diff --git a/include/gmssl/tls.h b/include/gmssl/tls.h
index e63fd1f1..2802b589 100644
--- a/include/gmssl/tls.h
+++ b/include/gmssl/tls.h
@@ -652,6 +652,7 @@ int tls_record_get_handshake_finished(const uint8_t *record,
 int tls_finished_print(FILE *fp, const uint8_t *a, size_t len, int format, int indent);
 
 
+
 // Alert
 typedef struct {
 	uint8_t level;
@@ -739,14 +740,52 @@ void tls_ctx_cleanup(TLS_CTX *ctx);
 #define TLS_ERROR_SYSCALL		-1003	// SSL_ERROR_SYSCALL
 
 
+enum {
+	TLS_state_handshake_init = 0,
+	TLS_state_client_hello,
+	TLS_state_server_hello,
+	TLS_state_server_certificate,
+	TLS_state_server_key_exchange,
+	TLS_state_certificate_request,
+	TLS_state_server_hello_done,
+	TLS_state_client_certificate,
+	TLS_state_client_key_exchange,
+	TLS_state_certificate_verify,
+	TLS_state_generate_keys,
+	TLS_state_client_change_cipher_spec,
+	TLS_state_client_finished,
+	TLS_state_server_change_cipher_spec,
+	TLS_state_server_finished,
+	TLS_state_handshake_over,
+};
 
 typedef struct {
-	int protocol;
 	int is_client;
 
 
+	int protocol;
+
+
+	/*
+	服务器端在初始化之后，会创建一个server_ciphers列表
+	在接收到client_ciphers之后，和自己的server_ciphers对比，选择出conn->cipher
+	也可能没有找到一致的cipher，那么就失败了
+	实际上服务器端的ciphers可以完全来自CTX，并不需要缓存
+
+	客户端在初始化之后，创建client_ciphers，发送给服务器
+	在接收到服务器的cipher后，要判断这个cipher是否在自己的client_ciphers之中
+	但是客户端是需要缓存ciphers的，这样才能够判断返回的cipher是否在自己的ciphers之中
+
+	下面的问题是在CONN中要维护哪些信息？
+	*/
+
+
 	int cipher_suites[TLS_MAX_CIPHER_SUITES_COUNT];
 	size_t cipher_suites_cnt;
+	int cipher_suite;
+
+
+
 	tls_socket_t sock;
 
 	uint8_t enced_record[TLS_MAX_RECORD_SIZE];
@@ -764,7 +803,6 @@ typedef struct {
 	uint8_t *data;
 	size_t datalen;
 
-	int cipher_suite;
 	uint8_t session_id[32];
 	size_t session_id_len;
 	uint8_t server_certs[TLS_MAX_CERTIFICATES_SIZE]; // TODO: use ptr and malloc			
@@ -775,9 +813,11 @@ typedef struct {
 	size_t ca_certs_len;
 
 	X509_KEY sign_key;
-	X509_KEY kenc_key;
+	X509_KEY kenc_key; // 应该作为服务器的SM2加密
+	X509_KEY server_enc_key;
 
 	int verify_result;
+	uint8_t pre_master_secret[48]; // 是否可以重用master_secret作为pre_master_secret呢？			
 	uint8_t master_secret[48];
 	uint8_t key_block[96];
 
@@ -833,6 +873,45 @@ typedef struct {
 #define TLS_MAX_EXTENSIONS_SIZE 512 // FIXME: no reason to give fixed max length			
 
 
+
+
+int tls_send_client_hello(TLS_CONNECT *conn);
+int tls_recv_client_hello(TLS_CONNECT *conn);
+int tls_send_server_hello(TLS_CONNECT *conn);
+int tls_recv_server_hello(TLS_CONNECT *conn);
+int tls_send_server_certificate(TLS_CONNECT *conn);
+int tls_recv_server_certificate(TLS_CONNECT *conn);
+int tls_send_server_key_exchange(TLS_CONNECT *conn);
+int tls_recv_server_key_exchange(TLS_CONNECT *conn);
+int tls_send_certificate_request(TLS_CONNECT *conn);
+int tls_recv_certificate_request(TLS_CONNECT *conn);
+int tls_send_server_hello_done(TLS_CONNECT *conn);
+int tls_recv_server_hello_done(TLS_CONNECT *conn);
+int tls_send_client_certificate(TLS_CONNECT *conn);
+int tls_recv_client_certificate(TLS_CONNECT *conn);
+int tls_generate_keys(TLS_CONNECT *conn);
+int tls_send_client_key_exchange(TLS_CONNECT *conn);
+int tls_recv_client_key_exchange(TLS_CONNECT *conn);
+int tls_send_certificate_verify(TLS_CONNECT *conn);
+int tls_recv_certificate_verify(TLS_CONNECT *conn);
+int tls_send_change_cipher_spec(TLS_CONNECT *conn);
+int tls_recv_change_cipher_spec(TLS_CONNECT *conn);
+int tls_send_client_finished(TLS_CONNECT *conn);
+int tls_recv_client_finished(TLS_CONNECT *conn);
+int tls_send_server_finished(TLS_CONNECT *conn);
+int tls_recv_server_finished(TLS_CONNECT *conn);
+
+int tlcp_send_client_hello(TLS_CONNECT *conn);
+int tlcp_recv_client_hello(TLS_CONNECT *conn);
+int tlcp_send_server_key_exchange(TLS_CONNECT *conn);
+int tlcp_recv_server_key_exchange(TLS_CONNECT *conn);
+int tlcp_generate_keys(TLS_CONNECT *conn);
+int tlcp_send_client_key_exchange(TLS_CONNECT *conn);
+int tlcp_recv_client_key_exchange(TLS_CONNECT *conn);
+
+void tls_clean_record(TLS_CONNECT *conn);
+
+
 int tls_init(TLS_CONNECT *conn, const TLS_CTX *ctx);
 int tls_set_socket(TLS_CONNECT *conn, tls_socket_t sock);
 int tls_do_handshake(TLS_CONNECT *conn);
@@ -916,6 +995,17 @@ int tls13_gcm_decrypt(const BLOCK_CIPHER_KEY *key, const uint8_t iv[12],
 
 int tls_encrypted_record_print(FILE *fp, const uint8_t *record,  size_t recordlen, int format, int indent);
 
+
+
+
+
+
+
+
+
+
+
+
 #ifdef  __cplusplus
 }
 #endif
diff --git a/src/sm2_sign.c b/src/sm2_sign.c
index 6aff3b0a..597a385d 100644
--- a/src/sm2_sign.c
+++ b/src/sm2_sign.c
@@ -600,9 +600,6 @@ int sm2_sign_finish_fixlen(SM2_SIGN_CTX *ctx, size_t siglen, uint8_t *sig)
 		return -1;
 	}
 	sm3_finish(&ctx->sm3_ctx, dgst);
-	format_bytes(stderr, 0, 4, "signed dgst", dgst, 32);
-
-
 	if (sm2_sign_fixlen(&ctx->key, dgst, siglen, sig) != 1) {
 		error_print();
 		return -1;
diff --git a/src/tlcp.c b/src/tlcp.c
index b71da301..67b0ac0a 100644
--- a/src/tlcp.c
+++ b/src/tlcp.c
@@ -25,6 +25,21 @@
 #include <gmssl/tls.h>
 
 
+// sign_master_public_key, enc_master_public_key, sign_key, enc_key
+int tls_ctx_set_sm9_keys(TLS_CTX *ctx, const char *masterfile,
+	const char *keyfile, const char *keypass)
+{
+	// 从masterfile中读取两个
+
+
+	// 从keyfile中读取两个密钥
+
+
+	return -1;
+}
+
+
+// TLCP的套件和TLS12不一样，我们现在只支持一种									
 static const int tlcp_ciphers[] = { TLS_cipher_ecc_sm4_cbc_sm3 };
 static const size_t tlcp_ciphers_count = sizeof(tlcp_ciphers)/sizeof(tlcp_ciphers[0]);
 
@@ -37,6 +52,8 @@ int tlcp_record_print(FILE *fp, const uint8_t *record,  size_t recordlen, int fo
 	return tls_record_print(fp, record, recordlen, format, indent);
 }
 
+
+
 /*
 select (KeyExchangeAlgorithm) {
 	case ECC:
@@ -49,6 +66,11 @@ select (KeyExchangeAlgorithm) {
 } ServerKeyExchange;
 
 -- in TLCP 1.1, the `signed_params` is DER signature encoded in uint16array
+
+
+在TLS12中，ServerKeyExchange中是有ECDH公钥的，但是在TLCP中
+
+
 */
 int tlcp_record_set_handshake_server_key_exchange_pke(uint8_t *record, size_t *recordlen,
 	const uint8_t *sig, size_t siglen)
@@ -128,7 +150,7 @@ int tlcp_server_key_exchange_pke_print(FILE *fp, const uint8_t *data, size_t dat
 	return 1;
 }
 
-int tlcp_do_connect(TLS_CONNECT *conn)
+int _tlcp_do_connect(TLS_CONNECT *conn)
 {
 	int ret = -1;
 	uint8_t *record = conn->record;
@@ -174,7 +196,7 @@ int tlcp_do_connect(TLS_CONNECT *conn)
 	int verify_result;
 
 
-	// 初始化记录缓冲
+	// 初始化记录缓冲，这里的主要区别在于，版本号是确定的！				
 	tls_record_set_protocol(record, TLS_protocol_tlcp);
 	tls_record_set_protocol(finished_record, TLS_protocol_tlcp);
 
@@ -256,9 +278,11 @@ int tlcp_do_connect(TLS_CONNECT *conn)
 	sm3_update(&sm3_ctx, record + 5, recordlen - 5);
 
 	// verify ServerCertificate
-	if (conn->ca_certs_len) {
+	if (conn->ca_certs_len) { // 这里不对啊，如果没准备CA证书，难道就不验证服务器证书了吗				
 		// 只有提供了CA证书才验证服务器证书链
 		// FIXME: 逻辑需要再检查
+		// 这里验证证书链的逻辑和TLS12不同				
+		// 但是证书链的验证逻辑可以根据协议的差异来选择				
 		if (x509_certs_verify_tlcp(conn->server_certs, conn->server_certs_len, X509_cert_chain_server,
 			conn->ca_certs, conn->ca_certs_len, depth, &verify_result) != 1) {
 			error_print();
@@ -276,6 +300,7 @@ int tlcp_do_connect(TLS_CONNECT *conn)
 		goto end;
 	}
 	tlcp_record_trace(stderr, record, recordlen, 0, 0);
+	// 显然这是一个TLCP独特的版本					
 	if (tlcp_record_get_handshake_server_key_exchange_pke(record, &sig, &siglen) != 1) {
 		error_print();
 		tls_send_alert(conn, TLS_alert_unexpected_message);
@@ -284,6 +309,7 @@ int tlcp_do_connect(TLS_CONNECT *conn)
 	sm3_update(&sm3_ctx, record + 5, recordlen - 5);
 
 	// verify ServerKeyExchange
+	// 这个策略应该没有什么不同，因为都是用第一个证书来验证签名
 	if (x509_certs_get_cert_by_index(conn->server_certs, conn->server_certs_len, 0, &cp, &len) != 1
 		|| x509_cert_get_subject_public_key(cp, len, &server_sign_key) != 1
 		|| x509_certs_get_cert_by_index(conn->server_certs, conn->server_certs_len, 1, &server_enc_cert, &server_enc_cert_len) != 1
@@ -419,8 +445,10 @@ int tlcp_do_connect(TLS_CONNECT *conn)
 
 	// send ClientKeyExchange
 	tls_trace("send ClientKeyExchange\n");
+	// 这里是比较特殊的，这里应该改为用X509_KEY的API，这样可以支持SM9等			
 	if (sm2_encrypt(&server_enc_key.u.sm2_key, pre_master_secret, 48,
 			enced_pre_master_secret, &enced_pre_master_secret_len) != 1
+		// 这个函数是TLCP专属的								
 		|| tls_record_set_handshake_client_key_exchange_pke(record, &recordlen,
 			enced_pre_master_secret, enced_pre_master_secret_len) != 1) {
 		error_print();
@@ -580,7 +608,7 @@ end:
 	return ret;
 }
 
-int tlcp_do_accept(TLS_CONNECT *conn)
+int _tlcp_do_accept(TLS_CONNECT *conn)
 {
 	int ret = -1;
 
@@ -680,7 +708,7 @@ int tlcp_do_accept(TLS_CONNECT *conn)
 		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
+		// 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;
@@ -738,6 +766,7 @@ int tlcp_do_accept(TLS_CONNECT *conn)
 		tls_send_alert(conn, TLS_alert_internal_error);
 		goto end;
 	}
+	// 需要检查一下TLCP和TLS12在这个消息上的差异是什么				
 	if (tlcp_record_set_handshake_server_key_exchange_pke(record, &recordlen, sigbuf, siglen) != 1) {
 		error_print();
 		tls_send_alert(conn, TLS_alert_internal_error);
@@ -819,11 +848,13 @@ int tlcp_do_accept(TLS_CONNECT *conn)
 		goto end;
 	}
 	tlcp_record_trace(stderr, record, recordlen, 0, 0);
+	// tls_record_get_handshake_client_key_exchange_pke 这个函数有问题，只用于TLCP的，应该放在TLCP文件中			
 	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;
 	}
+	// 这个处理是TLCP专属的
 	if (sm2_decrypt(&conn->kenc_key.u.sm2_key, enced_pms, enced_pms_len,
 		pre_master_secret, &pre_master_secret_len) != 1) {
 		error_print();
@@ -1021,3 +1052,379 @@ end:
 	gmssl_secure_clear(pre_master_secret, sizeof(pre_master_secret));
 	return ret;
 }
+
+/*
+	SM9_SM4_CBC_SM3
+
+	opaque SM9SignMasterPublicKey<0..2^24-1>;
+	struct {
+		opaque id<1..2^16-1>; // server's domain name, equivalent to entity cert
+		SM9SignMasterPublicKey sign_params; // equavalent to ca root cert, optional
+	} Certificate;
+
+	opaque SM9EncMasterPublicKey<0..2^24-1>;
+	struct {
+		SM9EncMasterPublicKey enc_params;
+		digitally-signed struct {
+			opaque client_random[32];
+			opaque server_random[32];
+			SM9EncMasterPublicKey enc_params;
+			opaque id<1..2^16-1>;
+		} signed_params;
+	} ServerKeyExchange;
+
+	struct {
+		opaque encrypted_pre_master_secret<0..2^16-1>;
+	} ClientKeyExchange
+
+*/
+
+
+/*
+      Client                                               Server
+
+      ClientHello                  -------->
+                                                      ServerHello
+                                                      Certificate
+                                                ServerKeyExchange
+                                              CertificateRequest*
+                                   <--------      ServerHelloDone
+      Certificate*
+      ClientKeyExchange
+      CertificateVerify*
+      [ChangeCipherSpec]
+      Finished                     -------->
+                                               [ChangeCipherSpec]
+                                   <--------             Finished
+      Application Data             <------->     Application Data
+
+
+*/
+
+int tlcp_do_client_handshake(TLS_CONNECT *conn)
+{
+	int ret;
+	int next_state;
+
+	switch (conn->state) {
+	case TLS_state_client_hello:
+		ret = tlcp_send_client_hello(conn);
+		next_state = TLS_state_server_hello;
+		break;
+
+	case TLS_state_server_hello:
+		ret = tls_recv_server_hello(conn);
+		next_state = TLS_state_server_certificate;
+		break;
+
+	case TLS_state_server_certificate:
+		ret = tls_recv_server_certificate(conn);
+		next_state = TLS_state_server_key_exchange;
+		break;
+
+	case TLS_state_server_key_exchange:
+		ret = tlcp_recv_server_key_exchange(conn);
+		next_state = TLS_state_certificate_request;
+		break;
+
+	case TLS_state_certificate_request:
+		ret = tls_recv_certificate_request(conn);
+		if (ret == 1) conn->client_certificate_verify = 1;
+		next_state = TLS_state_server_hello_done;
+		break;
+
+	case TLS_state_server_hello_done:
+		ret = tls_recv_server_hello_done(conn);
+		if (conn->client_certificate_verify)
+			next_state = TLS_state_client_certificate;
+		else	next_state = TLS_state_client_key_exchange;
+		break;
+
+	case TLS_state_client_certificate:
+		ret = tls_send_client_certificate(conn);
+		next_state = TLS_state_client_key_exchange;
+		break;
+
+	case TLS_state_client_key_exchange:
+		ret = tlcp_send_client_key_exchange(conn);
+		next_state = TLS_state_generate_keys;
+		break;
+
+	case TLS_state_generate_keys:
+		ret = tlcp_generate_keys(conn);
+		if (conn->client_certificate_verify)
+			next_state = TLS_state_certificate_verify;
+		else	next_state = TLS_state_client_change_cipher_spec;
+		break;
+
+	case TLS_state_certificate_verify:
+		ret = tls_send_certificate_verify(conn);
+		next_state = TLS_state_client_change_cipher_spec;
+
+	case TLS_state_client_change_cipher_spec:
+		ret = tls_send_change_cipher_spec(conn);
+		next_state = TLS_state_client_finished;
+		break;
+
+	case TLS_state_client_finished:
+		ret = tls_send_client_finished(conn);
+		next_state = TLS_state_server_change_cipher_spec;
+		break;
+
+	case TLS_state_server_change_cipher_spec:
+		ret = tls_recv_change_cipher_spec(conn);
+		next_state = TLS_state_server_finished;
+		break;
+
+	case TLS_state_server_finished:
+		ret = tls_recv_server_finished(conn);
+		next_state = TLS_state_handshake_over;
+		break;
+
+	default:
+		error_print();
+		return -1;
+	}
+
+	if (ret < 0) {
+		if (ret == TLS_ERROR_RECV_AGAIN || ret == TLS_ERROR_SEND_AGAIN) {
+			return ret;
+		} else {
+			error_print();
+			return ret;
+		}
+	}
+
+	conn->state = next_state;
+
+	// ret == 0 means this step is bypassed
+	if (ret == 1) {
+		tls_clean_record(conn);
+	}
+
+	return 1;
+}
+
+int tlcp_do_server_handshake(TLS_CONNECT *conn)
+{
+	int ret;
+	int next_state;
+
+	switch (conn->state) {
+	case TLS_state_client_hello:
+		ret = tlcp_recv_client_hello(conn);
+		next_state = TLS_state_server_hello;
+		break;
+
+	case TLS_state_server_hello:
+		ret = tls_send_server_hello(conn);
+		next_state = TLS_state_server_certificate;
+		break;
+
+	case TLS_state_server_certificate:
+		ret = tls_send_server_certificate(conn);
+		next_state = TLS_state_server_key_exchange;
+		break;
+
+	case TLS_state_server_key_exchange:
+		ret = tlcp_send_server_key_exchange(conn);
+		if (conn->client_certificate_verify)
+			next_state = TLS_state_certificate_request;
+		else	next_state = TLS_state_server_hello_done;
+		break;
+
+	case TLS_state_certificate_request:
+		ret = tls_send_certificate_request(conn);
+		next_state = TLS_state_server_hello_done;
+		break;
+
+	case TLS_state_server_hello_done:
+		ret = tls_send_server_hello_done(conn);
+		if (conn->client_certificate_verify)
+			next_state = TLS_state_client_certificate;
+		else	next_state = TLS_state_client_key_exchange;
+		break;
+
+	case TLS_state_client_certificate:
+		ret = tls_recv_client_certificate(conn);
+		next_state = TLS_state_client_key_exchange;
+		break;
+
+	case TLS_state_client_key_exchange:
+		ret = tlcp_recv_client_key_exchange(conn);
+		if (conn->client_certificate_verify)
+			next_state = TLS_state_certificate_verify;
+		else	next_state = TLS_state_generate_keys;
+		break;
+
+	case TLS_state_certificate_verify:
+		ret = tls_recv_certificate_verify(conn);
+		next_state = TLS_state_generate_keys;
+		break;
+
+	case TLS_state_generate_keys:
+		ret = tlcp_generate_keys(conn);
+		next_state = TLS_state_client_change_cipher_spec;
+		break;
+
+	case TLS_state_client_change_cipher_spec:
+		ret = tls_recv_change_cipher_spec(conn);
+		next_state = TLS_state_client_finished;
+		break;
+
+	case TLS_state_client_finished:
+		ret = tls_recv_client_finished(conn);
+		next_state = TLS_state_server_change_cipher_spec;
+		break;
+
+	case TLS_state_server_change_cipher_spec:
+		ret = tls_send_change_cipher_spec(conn);
+		next_state = TLS_state_server_finished;
+		break;
+
+	case TLS_state_server_finished:
+		ret = tls_send_server_finished(conn);
+		next_state = TLS_state_handshake_over;
+		break;
+
+	default:
+		error_print();
+		return -1;
+	}
+
+	if (ret != 1) {
+		if (ret == TLS_ERROR_RECV_AGAIN || ret == TLS_ERROR_SEND_AGAIN) {
+			return ret;
+		} else {
+			error_print();
+			return ret;
+		}
+
+	}
+
+	conn->state = next_state;
+
+	tls_clean_record(conn);
+
+	return 1;
+}
+
+int tlcp_client_handshake(TLS_CONNECT *conn)
+{
+	int ret;
+
+	while (conn->state != TLS_state_handshake_over) {
+
+		ret = tlcp_do_client_handshake(conn);
+
+		if (ret != 1) {
+			if (ret != TLS_ERROR_RECV_AGAIN && ret != TLS_ERROR_SEND_AGAIN) {
+				error_print();
+			}
+			return ret;
+		}
+	}
+
+	// TODO: cleanup conn?
+
+	return 1;
+}
+
+int tlcp_server_handshake(TLS_CONNECT *conn)
+{
+	int ret;
+
+
+	while (conn->state != TLS_state_handshake_over) {
+
+		ret = tlcp_do_server_handshake(conn);
+
+		if (ret != 1) {
+			if (ret != TLS_ERROR_RECV_AGAIN && ret != TLS_ERROR_SEND_AGAIN) {
+				error_print();
+			}
+			return ret;
+		}
+	}
+
+	// TODO: cleanup conn?
+
+	return 1;
+}
+
+int tlcp_do_connect(TLS_CONNECT *conn)
+{
+	int ret;
+	fd_set rfds;
+	fd_set wfds;
+
+	// 应该把protocol_version的初始化放在这里
+
+	conn->state = TLS_state_client_hello;
+	sm3_init(&conn->sm3_ctx);
+
+	while (1) {
+
+		ret = tlcp_client_handshake(conn);
+		if (ret == 1) {
+			break;
+
+		} else if (ret == TLS_ERROR_SEND_AGAIN) {
+			FD_ZERO(&rfds);
+			FD_ZERO(&wfds);
+			FD_SET(conn->sock, &rfds);
+			select(conn->sock + 1, &rfds, &wfds, NULL, NULL);
+
+		} else if (ret == TLS_ERROR_RECV_AGAIN) {
+			FD_ZERO(&rfds);
+			FD_ZERO(&wfds);
+			FD_SET(conn->sock, &wfds);
+			select(conn->sock + 1, &rfds, &wfds, NULL, NULL);
+
+		} else {
+			error_print();
+			return -1;
+		}
+	}
+
+	return 1;
+}
+
+int tlcp_do_accept(TLS_CONNECT *conn)
+{
+	int ret;
+	fd_set rfds;
+	fd_set wfds;
+
+	conn->state = TLS_state_client_hello;
+
+	sm3_init(&conn->sm3_ctx);
+
+	while (1) {
+
+		ret = tlcp_server_handshake(conn);
+
+		if (ret == 1) {
+			break;
+
+		} else if (ret == TLS_ERROR_SEND_AGAIN) {
+			FD_ZERO(&rfds);
+			FD_ZERO(&wfds);
+			FD_SET(conn->sock, &rfds);
+			select(conn->sock + 1, &rfds, &wfds, NULL, NULL);
+
+		} else if (ret == TLS_ERROR_RECV_AGAIN) {
+			FD_ZERO(&rfds);
+			FD_ZERO(&wfds);
+			FD_SET(conn->sock, &wfds);
+			select(conn->sock + 1, &rfds, &wfds, NULL, NULL);
+
+		} else {
+			error_print();
+			return -1;
+		}
+	}
+
+	return 1;
+}
+
diff --git a/src/tls.c b/src/tls.c
index 3a3e22ca..09a776b1 100644
--- a/src/tls.c
+++ b/src/tls.c
@@ -2096,6 +2096,8 @@ int tls_ctx_init(TLS_CTX *ctx, int protocol, int is_client)
 	return 1;
 }
 
+
+// FIXME: 根据protocol，核对输入的ciphers是否满足protocol的条件
 int tls_ctx_set_cipher_suites(TLS_CTX *ctx, const int *cipher_suites, size_t cipher_suites_cnt)
 {
 	size_t i;
@@ -2314,8 +2316,11 @@ int tls_init(TLS_CONNECT *conn, const TLS_CTX *ctx)
 	size_t i;
 	memset(conn, 0, sizeof(*conn));
 
-	conn->protocol = ctx->protocol;
+
 	conn->is_client = ctx->is_client;
+
+	conn->protocol = ctx->protocol;
+
 	for (i = 0; i < ctx->cipher_suites_cnt; i++) {
 		conn->cipher_suites[i] = ctx->cipher_suites[i];
 	}
@@ -2348,6 +2353,7 @@ int tls_init(TLS_CONNECT *conn, const TLS_CTX *ctx)
 
 
 	conn->verify_depth = ctx->verify_depth;
+
 	return 1;
 }
 
diff --git a/src/tls12.c b/src/tls12.c
index ec7c631a..cac299c7 100644
--- a/src/tls12.c
+++ b/src/tls12.c
@@ -27,14 +27,13 @@
 #include <errno.h>
 #include <sys/select.h>
 
-
-
 static const int tls12_ciphers[] = {
 	TLS_cipher_ecdhe_sm4_cbc_sm3,
 	TLS_cipher_ecdhe_sm4_gcm_sm3,
 	TLS_cipher_ecdhe_ecdsa_with_aes_128_cbc_sha256,
 };
 
+
 // 现在client_certificate_verify做的是不好的
 /*
 	是否要求客户端提供证书是服务器决定的，服务器方需要提供相应的CA证书
@@ -194,24 +193,11 @@ int tls_named_curve_from_oid(int oid)
 	return 0;
 }
 
-enum {
-	TLS_state_handshake_init = 0,
-	TLS_state_client_hello,
-	TLS_state_server_hello,
-	TLS_state_server_certificate,
-	TLS_state_server_key_exchange,
-	TLS_state_certificate_request,
-	TLS_state_server_hello_done,
-	TLS_state_client_certificate,
-	TLS_state_client_key_exchange,
-	TLS_state_certificate_verify,
-	TLS_state_generate_keys,
-	TLS_state_client_change_cipher_spec,
-	TLS_state_client_finished,
-	TLS_state_server_change_cipher_spec,
-	TLS_state_server_finished,
-	TLS_state_handshake_over,
-};
+
+
+
+
+
 
 // 这个是必选的
 const int ec_point_formats[] = { TLS_point_uncompressed };
@@ -256,6 +242,7 @@ int tls_record_set_handshake_server_key_exchange(uint8_t *record, size_t *record
 	return 1;
 }
 
+// 这个函数是有问题的，因为tlcp的格式和TLS不一样
 int tls_record_get_handshake_server_key_exchange(const uint8_t *record,
 	uint8_t *curve_type, uint16_t *named_curve,
 	const uint8_t **point_octets, size_t *point_octets_len,
@@ -373,6 +360,13 @@ int tls_handshake_init(TLS_CONNECT *conn)
 	return 1;
 }
 
+
+/*
+TLCP协议中ClientHello中不包含扩展，并且cipher_suites使用的是TLCP的cipher_suites
+ciphers我觉得应该在设置ctx的时候设置好
+exts
+
+*/
 int tls_send_client_hello(TLS_CONNECT *conn)
 {
 	int ret;
@@ -383,12 +377,23 @@ int tls_send_client_hello(TLS_CONNECT *conn)
 		uint8_t *p = client_exts;
 		size_t client_exts_len = 0;
 
-		tls_record_set_protocol(record, TLS_protocol_tls1);
+		switch (conn->protocol) {
+		case TLS_protocol_tls12:
+			tls_record_set_protocol(record, TLS_protocol_tls1);
+			break;
+		case TLS_protocol_tlcp:
+			tls_record_set_protocol(record, TLS_protocol_tlcp);
+			break;
+		default:
+			error_print();
+			return -1;
+		}
 
 		if (tls_random_generate(conn->client_random) != 1) {
 			error_print();
 			return -1;
 		}
+
 		if (tls_ec_point_formats_ext_to_bytes(ec_point_formats, ec_point_formats_cnt, &p, &client_exts_len) != 1
 			|| tls_supported_groups_ext_to_bytes(supported_groups, supported_groups_cnt, &p, &client_exts_len) != 1
 			|| tls_signature_algorithms_ext_to_bytes(signature_algors, signature_algors_cnt, &p, &client_exts_len) != 1) {
@@ -397,7 +402,7 @@ int tls_send_client_hello(TLS_CONNECT *conn)
 		}
 		if (tls_record_set_handshake_client_hello(conn->record, &conn->recordlen,
 			conn->protocol, conn->client_random, NULL, 0,
-			tls12_ciphers, sizeof(tls12_ciphers)/sizeof(tls12_ciphers[0]),
+			conn->cipher_suites, conn->cipher_suites_cnt,
 			client_exts, client_exts_len) != 1) {
 			error_print();
 			return -1;
@@ -427,8 +432,160 @@ int tls_send_client_hello(TLS_CONNECT *conn)
 	return 1;
 }
 
+//static const int tlcp_ciphers[] = { TLS_cipher_ecc_sm4_cbc_sm3 };
+
+int tlcp_send_client_hello(TLS_CONNECT *conn)
+{
+	int ret;
+	uint8_t *record = conn->record;
+
+	if (!conn->recordlen) {
+		tls_record_set_protocol(record, TLS_protocol_tlcp);
+
+		if (tls_random_generate(conn->client_random) != 1) {
+			error_print();
+			return -1;
+		}
+
+		if (tls_record_set_handshake_client_hello(conn->record, &conn->recordlen,
+			conn->protocol, conn->client_random, NULL, 0,
+			conn->cipher_suites, conn->cipher_suites_cnt,
+			NULL, 0) != 1) {
+			error_print();
+			return -1;
+		}
+		// offset = 0, recordlen > 0
+
+		tls_trace("send ClientHello\n");
+		tlcp_record_trace(stderr, conn->record, conn->recordlen, 0, 0);
+		sm3_update(&conn->sm3_ctx, conn->record + 5, conn->recordlen - 5);
+	}
+
+	if (conn->client_certificate_verify) {
+		sm2_sign_update(&conn->sign_ctx, conn->record + 5, conn->recordlen - 5);
+	}
+
+	if ((ret = tls_send_record(conn)) != 1) {
+		if (ret != TLS_ERROR_SEND_AGAIN) {
+			error_print();
+		}
+		return ret;
+	}
+
+	tls_clean_record(conn);
+	return 1;
+}
+
+int tlcp_recv_client_hello(TLS_CONNECT *conn)
+{
+	int ret;
+	uint8_t *record = conn->record;
+	size_t recordlen;
+
+	int client_verify = 0;
+
+	int protocol;
+	const uint8_t *client_random;
+	const uint8_t *session_id;
+	size_t session_id_len;
+	const uint8_t *client_ciphers;
+	size_t client_ciphers_len;
+	const uint8_t *client_exts;
+	size_t client_exts_len;
+
+	sm3_init(&conn->sm3_ctx);
+
+
+	// 服务器端如果设置了CA
+	if (conn->ca_certs_len)
+		client_verify = 1;
+
+	// 这个判断应该改为一个函数
+	if (client_verify)
+		tls_client_verify_init(&conn->client_verify_ctx);
+
+
+	tls_trace("recv ClientHello\n");
+
+	if ((ret = tls_recv_record(conn)) != 1) {
+		if (ret != TLS_ERROR_RECV_AGAIN) {
+			error_print();
+		}
+		return ret;
+	}
+	tlcp_record_trace(stderr, conn->record, conn->recordlen, 0, 0);
+
+
+	// 这里TLCP和TLS12是不一样的
+	if (tls_record_protocol(record) != conn->protocol) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_protocol_version);
+		return -1;
+	}
+
+	if (tls_record_get_handshake_client_hello(record,
+		&protocol, &client_random, &session_id, &session_id_len,
+		&client_ciphers, &client_ciphers_len,
+		&client_exts, &client_exts_len) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_unexpected_message);
+		return -1;
+	}
+
+	if (protocol != conn->protocol) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_protocol_version);
+		return -1;
+	}
+	memcpy(conn->client_random, client_random, 32);
+
+	if (tls_cipher_suites_select(client_ciphers, client_ciphers_len,
+		conn->cipher_suites, conn->cipher_suites_cnt,
+		&conn->cipher_suite) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_insufficient_security);
+		return -1;
+	}
+
+	switch (conn->cipher_suite) {
+	case TLS_cipher_ecc_sm4_cbc_sm3:
+		conn->sig_alg = TLS_sig_sm2sig_sm3;
+		conn->ecdh_named_curve = 0;
+		break;
+	case TLS_cipher_ecdhe_sm4_cbc_sm3:
+	case TLS_cipher_ecdhe_sm4_gcm_sm3:
+	default:
+		error_print();
+		return -1;
+	}
+
+	if (client_exts) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_unexpected_message);
+		return -1;
+	}
+
+	sm3_update(&conn->sm3_ctx, conn->record + 5, conn->recordlen - 5);
+	if (client_verify)
+		tls_client_verify_update(&conn->client_verify_ctx, conn->record + 5, conn->recordlen - 5);
+
+
+	fprintf(stderr, "end of recv_client_hello\n");
+	tls_clean_record(conn);
+
+	return 1;
+}
+
+
+
+
+
+
+
+/*
 const int server_ciphers[] = { TLS_cipher_ecdhe_sm4_cbc_sm3 };
 const size_t server_ciphers_cnt = 1;
+*/
 const int curve = TLS_curve_sm2p256v1;
 
 
@@ -473,6 +630,8 @@ int tls_recv_client_hello(TLS_CONNECT *conn)
 	tls12_record_trace(stderr, conn->record, conn->recordlen, 0, 0);
 
 
+
+
 	if (tls_record_protocol(record) != conn->protocol
 		&& tls_record_protocol(record) != TLS_protocol_tls1) {
 		error_print();
@@ -498,7 +657,7 @@ int tls_recv_client_hello(TLS_CONNECT *conn)
 
 	// 服务器选择的cipher_suites需要和服务器准备的证书和公钥匹配
 	if (tls_cipher_suites_select(client_ciphers, client_ciphers_len,
-		server_ciphers, server_ciphers_cnt,
+		conn->cipher_suites, conn->cipher_suites_cnt,
 		&conn->cipher_suite) != 1) {
 		error_print();
 		tls_send_alert(conn, TLS_alert_insufficient_security);
@@ -539,17 +698,26 @@ int tls_recv_client_hello(TLS_CONNECT *conn)
 int tls_send_server_hello(TLS_CONNECT *conn)
 {
 	int ret;
+
 	tls_trace("send ServerHello\n");
 
 	if (conn->recordlen == 0) {
+		const uint8_t *server_exts = NULL;
+		size_t server_exts_len = 0;
+
 		tls_record_set_protocol(conn->record, conn->protocol);
 		if (tls_random_generate(conn->server_random) != 1) {
 			error_print();
 			return -1;
 		}
+		if (conn->server_exts_len) {
+			server_exts = conn->server_exts;
+			server_exts_len = conn->server_exts_len;
+		}
 		if (tls_record_set_handshake_server_hello(conn->record, &conn->recordlen,
 			conn->protocol, conn->server_random, NULL, 0,
-			conn->cipher_suite, conn->server_exts, conn->server_exts_len) != 1) {
+			conn->cipher_suite,
+			server_exts, server_exts_len) != 1) {
 			error_print();
 			tls_send_alert(conn, TLS_alert_internal_error);
 			return -1;
@@ -617,24 +785,33 @@ int tls_recv_server_hello(TLS_CONNECT *conn)
 		tls_send_alert(conn, TLS_alert_protocol_version);
 		return -1;
 	}
-	// tls12_ciphers 应该改为conn的内部变量
-	if (tls_cipher_suite_in_list(cipher_suite, tls12_ciphers, sizeof(tls12_ciphers)/sizeof(tls12_ciphers[0])) != 1) {
+	if (tls_cipher_suite_in_list(cipher_suite, conn->cipher_suites, conn->cipher_suites_cnt) != 1) {
 		error_print();
 		tls_send_alert(conn, TLS_alert_handshake_failure);
 		return -1;
 	}
-	if (!server_exts) {
-		error_print();
-		tls_send_alert(conn, TLS_alert_unexpected_message);
-		return -1;
-	}
-	if (tls_process_server_hello_exts(server_exts, server_exts_len, &ec_point_format, &supported_group, &signature_algor) != 1
-		|| ec_point_format < 0
-		|| supported_group < 0
-		|| signature_algor < 0) {
-		error_print();
-		tls_send_alert(conn, TLS_alert_unexpected_message);
-		return -1;
+
+	/*
+	对于扩展的处理
+
+
+	首先扩展是由客户端ClientHello进行设定，服务器选择，最后由Client验证的一个过程。
+	因此客户端和服务器端都需要存储扩展相应的数据。
+
+	扩展的初始化是如何实现的？我觉得也应该在CTX中完成。
+
+	现在对扩展的处理逻辑是有问题的，服务器ServerHello是否包含扩展是取决于ClientHello的
+
+	*/
+	if (server_exts) {
+		if (tls_process_server_hello_exts(server_exts, server_exts_len, &ec_point_format, &supported_group, &signature_algor) != 1
+			|| ec_point_format < 0
+			|| supported_group < 0
+			|| signature_algor < 0) {
+			error_print();
+			tls_send_alert(conn, TLS_alert_unexpected_message);
+			return -1;
+		}
 	}
 
 	memcpy(conn->server_random, server_random, 32);
@@ -648,6 +825,10 @@ int tls_recv_server_hello(TLS_CONNECT *conn)
 	return 1;
 }
 
+// TLS12 发送的是常规的证书链
+// TLCP SM2 发送的是SM2的双证书链，但是在数据格式上没有区别
+// TLCP SM9 发送的是服务器的ID和SM9公开参数（这个格式是不同的），但是存储上可能也是一样的
+// 我不确定SM2和SM9的格式是否是相容的			
 int tls_send_server_certificate(TLS_CONNECT *conn)
 {
 	int ret;
@@ -708,6 +889,8 @@ int tls_recv_server_certificate(TLS_CONNECT *conn)
 		return -1;
 	}
 
+	// 这下面是对获取的证书链的处理
+
 	if (x509_certs_get_cert_by_index(conn->server_certs, conn->server_certs_len, 0,
 		&server_cert, &server_cert_len) != 1) {
 		error_print();
@@ -720,6 +903,9 @@ int tls_recv_server_certificate(TLS_CONNECT *conn)
 		return -1;
 	}
 
+	// 这里的逻辑需要统筹考虑				
+	// cipher_suite，扩展，证书之间的关系
+
 	// set conn->server_sig_alg (decided by cipher_suite and server_cert.sign_key.algor, algor_param)
 	if (server_sign_key.algor != OID_ec_public_key) {
 		error_print();
@@ -757,16 +943,96 @@ int tls_recv_server_certificate(TLS_CONNECT *conn)
 	assert(conn->verify_depth > 0 && conn->verify_depth < 10);
 
 	// verify ServerCertificate
-	if (x509_certs_verify(conn->server_certs, conn->server_certs_len, X509_cert_chain_server,
-		conn->ca_certs, conn->ca_certs_len, conn->verify_depth, &verify_result) != 1) {
+
+	switch (conn->protocol) {
+	case TLS_protocol_tls12:
+		if (x509_certs_verify(conn->server_certs, conn->server_certs_len, X509_cert_chain_server,
+			conn->ca_certs, conn->ca_certs_len, conn->verify_depth, &verify_result) != 1) {
+			error_print();
+			tls_send_alert(conn, TLS_alert_bad_certificate);
+			return -1;
+		}
+		break;
+	case TLS_protocol_tlcp:
+		if (!conn->ca_certs_len) {
+			error_print();
+			return -1;
+		}
+		if (x509_certs_verify_tlcp(conn->server_certs, conn->server_certs_len, X509_cert_chain_server,
+			conn->ca_certs, conn->ca_certs_len, conn->verify_depth, &verify_result) != 1) {
+			error_print();
+			tls_send_alert(conn, TLS_alert_bad_certificate);
+			return -1;
+		}
+		break;
+	default:
 		error_print();
-		tls_send_alert(conn, TLS_alert_bad_certificate);
 		return -1;
 	}
 
 	return 1;
 }
 
+int tlcp_send_server_key_exchange(TLS_CONNECT *conn)
+{
+	SM2_SIGN_CTX sign_ctx;
+	uint8_t sigbuf[SM2_MAX_SIGNATURE_SIZE];
+	size_t siglen;
+	const uint8_t *server_enc_cert;
+	size_t server_enc_cert_len;
+	uint8_t server_enc_cert_lenbuf[3];
+	uint8_t *p;
+	size_t len;
+	int ret;
+
+	tls_trace("send ServerKeyExchange\n");
+
+	if (conn->recordlen == 0) {
+
+		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();
+			return -1;
+		}
+
+		p = server_enc_cert_lenbuf;
+		len = 0;
+		tls_uint24_to_bytes((uint24_t)server_enc_cert_len, &p, &len);
+
+		if (sm2_sign_init(&sign_ctx, &conn->sign_key.u.sm2_key, SM2_DEFAULT_ID, SM2_DEFAULT_ID_LENGTH) != 1
+			|| sm2_sign_update(&sign_ctx, conn->client_random, 32) != 1
+			|| sm2_sign_update(&sign_ctx, conn->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);
+			return -1;
+		}
+
+		if (tlcp_record_set_handshake_server_key_exchange_pke(conn->record, &conn->recordlen, sigbuf, siglen) != 1) {
+			error_print();
+			tls_send_alert(conn, TLS_alert_internal_error);
+			return -1;
+		}
+		tlcp_record_trace(stderr, conn->record, conn->recordlen, 0, 0);
+	}
+
+	if ((ret = tls_send_record(conn)) != 1) {
+		if (ret != TLS_ERROR_SEND_AGAIN) {
+			error_print();
+		}
+		return ret;
+	}
+
+	sm3_update(&conn->sm3_ctx, conn->record + 5, conn->recordlen - 5);
+	if (conn->client_certificate_verify) {
+		tls_client_verify_update(&conn->client_verify_ctx, conn->record + 5, conn->recordlen - 5);
+	}
+
+	return 1;
+}
+
 int tls_send_server_key_exchange(TLS_CONNECT *conn)
 {
 	int ret;
@@ -903,6 +1169,8 @@ int tls_signature_scheme_match_cipher_suite(int sig_alg, int cipher_suite)
 	return 1;
 }
 
+// 这里应该给一个新的key_exchange
+
 int tls_recv_server_key_exchange(TLS_CONNECT *conn)
 {
 	int ret;
@@ -942,7 +1210,8 @@ int tls_recv_server_key_exchange(TLS_CONNECT *conn)
 	}
 	tls12_record_trace(stderr, conn->record, conn->recordlen, 0, 0);
 
-
+	// 这里应该改为，首先获取一个基础的ServerKeyExchange的数据（已经经过了验证签名）
+	// 然后再用不同的函数（不同协议）去分解				
 	if (tls_record_get_handshake_server_key_exchange(conn->record,
 		&curve_type, &named_curve, &point_octets, &point_octets_len,
 		&server_ecdh_params, &server_ecdh_params_len,
@@ -1051,6 +1320,79 @@ int tls_recv_server_key_exchange(TLS_CONNECT *conn)
 	return 1;
 }
 
+int tlcp_recv_server_key_exchange(TLS_CONNECT *conn)
+{
+	const uint8_t *sig;
+	size_t siglen;
+	const uint8_t *cp;
+	size_t len;
+	X509_KEY server_sign_key;
+
+	const uint8_t *server_enc_cert;
+	size_t server_enc_cert_len;
+
+	uint8_t server_enc_cert_lenbuf[3];
+	uint8_t *p;
+
+	SM2_VERIFY_CTX verify_ctx;
+
+
+	tls_trace("recv ServerKeyExchange\n");
+
+	if (tls_record_recv(conn->record, &conn->recordlen, conn->sock) != 1
+		|| tls_record_protocol(conn->record) != TLS_protocol_tlcp) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_unexpected_message);
+		return -1;
+	}
+	tlcp_record_trace(stderr, conn->record, conn->recordlen, 0, 0);
+
+	if (tlcp_record_get_handshake_server_key_exchange_pke(conn->record, &sig, &siglen) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_unexpected_message);
+		return -1;
+	}
+	sm3_update(&conn->sm3_ctx, conn->record + 5, conn->recordlen - 5);
+
+
+	// verify ServerKeyExchange
+	if (x509_certs_get_cert_by_index(conn->server_certs, conn->server_certs_len, 0, &cp, &len) != 1
+		|| x509_cert_get_subject_public_key(cp, len, &server_sign_key) != 1
+		|| x509_certs_get_cert_by_index(conn->server_certs, conn->server_certs_len, 1, &server_enc_cert, &server_enc_cert_len) != 1
+		|| x509_cert_get_subject_public_key(server_enc_cert, server_enc_cert_len, &conn->server_enc_key) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_bad_certificate);
+		return -1;
+	}
+	if (server_sign_key.algor != OID_ec_public_key
+		|| server_sign_key.algor_param != OID_sm2
+		|| conn->server_enc_key.algor != OID_ec_public_key
+		|| conn->server_enc_key.algor_param != OID_sm2) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_bad_certificate);
+		return -1;
+	}
+	p = server_enc_cert_lenbuf;
+	len = 0;
+	tls_uint24_to_bytes((uint24_t)server_enc_cert_len, &p, &len);
+	if (sm2_verify_init(&verify_ctx, &server_sign_key.u.sm2_key, SM2_DEFAULT_ID, SM2_DEFAULT_ID_LENGTH) != 1
+		|| sm2_verify_update(&verify_ctx, conn->client_random, 32) != 1
+		|| sm2_verify_update(&verify_ctx, conn->server_random, 32) != 1
+		|| sm2_verify_update(&verify_ctx, server_enc_cert_lenbuf, 3) != 1
+		|| sm2_verify_update(&verify_ctx, server_enc_cert, server_enc_cert_len) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_internal_error);
+		return -1;
+	}
+	if (sm2_verify_finish(&verify_ctx, sig, siglen) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_decrypt_error);
+		return -1;
+	}
+
+	return 1;
+}
+
 int tls_send_certificate_request(TLS_CONNECT *conn)
 {
 	int ret;
@@ -1303,12 +1645,36 @@ int tls_recv_client_certificate(TLS_CONNECT *conn)
 	return 1;
 }
 
+/*
+不同密码套件中使用的密钥生成方法不一样，需要的输入也不一样。
+应该考虑在CONN中维护union版本的ServerKeyExchange和ClientKeyExchange
+
+			ServerKeyExchange	ClientKeyExchange
+	ECDHE Server	X509_KEY		X509_KEY public
+	ECDHE Client	X509_KEY		X509_KEY public
+	ECC Server	N/A			SM2Cipher
+	ECC Client	N/A			N/A		客户端可能需要服务器公钥的类型
+
+
+我们现在还不支持SM2的ECDH呢！
+SM9相关的密码套件呢？
+
+
+
+
+
+*/
+
 int tls_generate_keys(TLS_CONNECT *conn)
 {
 	uint8_t pre_master_secret[32];
 	size_t pre_master_secret_len;
 	uint8_t key_block[96];
 
+	// 此时已经获得了ServerKeyExchange和ClientKeyExchange
+	// 但是不同密码套件中，这些KeyExchange的数据其实是不一样的
+	// 我们需要根据不同的套件去解析数据，并且根据不同的数据类型去生成密钥
+	// 还需要检查 TLS 1.3 的协议							
 
 	if (x509_key_exchange(&conn->ecdh_key,
 		conn->peer_ecdh_point, conn->peer_ecdh_point_len,
@@ -1359,6 +1725,51 @@ int tls_generate_keys(TLS_CONNECT *conn)
 	return 1;
 }
 
+// 对于客户端，是先发送client_key_exchange在generate_keys
+int tlcp_generate_keys(TLS_CONNECT *conn)
+{
+	uint8_t enced_pre_master_secret[SM2_MAX_CIPHERTEXT_SIZE];
+	size_t enced_pre_master_secret_len;
+
+	tls_trace("generate secrets\n");
+
+
+
+	if (tls_prf(conn->pre_master_secret, 48, "master secret",
+			conn->client_random, 32,
+			conn->server_random, 32,
+			48, conn->master_secret) != 1
+		|| tls_prf(conn->master_secret, 48, "key expansion",
+			conn->server_random, 32, // 这里顺序为什么是反的				
+			conn->client_random, 32,
+			96, conn->key_block) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_internal_error);
+		return -1;
+	}
+
+	// 主力这里是不对的，需要为client, server设定不同的加密密钥			
+	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);
+
+	if (conn->is_client) {
+		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);
+	} else {
+		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,
+		conn->pre_master_secret, 48,
+		conn->client_random, conn->server_random,
+		conn->master_secret,
+		conn->key_block, 96,
+		0, 4);
+
+	return 1;
+}
+
 int tls_send_client_key_exchange(TLS_CONNECT *conn)
 {
 	int ret;
@@ -1449,6 +1860,80 @@ int tls_recv_client_key_exchange(TLS_CONNECT *conn)
 	return 1;
 }
 
+// 对于TLCP是否应该先执行send_client_key_exchange再生成密钥呢？
+int tlcp_send_client_key_exchange(TLS_CONNECT *conn)
+{
+	uint8_t enced_pre_master_secret[SM2_MAX_CIPHERTEXT_SIZE];
+	size_t enced_pre_master_secret_len;
+
+	tls_trace("send ClientKeyExchange\n");
+
+	if (tls_pre_master_secret_generate(conn->pre_master_secret, TLS_protocol_tlcp) != 1) {
+		error_print();
+		return -1;
+	}
+
+	if (sm2_encrypt(&conn->server_enc_key.u.sm2_key, conn->pre_master_secret, 48,
+			enced_pre_master_secret, &enced_pre_master_secret_len) != 1
+		|| tls_record_set_handshake_client_key_exchange_pke(conn->record, &conn->recordlen,
+			enced_pre_master_secret, enced_pre_master_secret_len) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_internal_error);
+		return -1;
+	}
+	tlcp_record_trace(stderr, conn->record, conn->recordlen, 0, 0);
+	if (tls_record_send(conn->record, conn->recordlen, conn->sock) != 1) {
+		error_print();
+		return -1;
+	}
+	sm3_update(&conn->sm3_ctx, conn->record + 5, conn->recordlen - 5);
+
+	return 1;
+}
+
+int tlcp_recv_client_key_exchange(TLS_CONNECT *conn)
+{
+	const uint8_t *enced_pms;
+	size_t enced_pms_len;
+	size_t pre_master_secret_len;
+
+	tls_trace("recv ClientKeyExchange\n");
+
+	if (tls_record_recv(conn->record, &conn->recordlen, conn->sock) != 1
+		|| tls_record_protocol(conn->record) != TLS_protocol_tlcp) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_unexpected_message);
+		return -1;
+	}
+	tlcp_record_trace(stderr, conn->record, conn->recordlen, 0, 0);
+
+	if (tls_record_get_handshake_client_key_exchange_pke(conn->record, &enced_pms, &enced_pms_len) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_unexpected_message);
+		return -1;
+	}
+
+	// FIXME:
+	// 这里需要检查一下密钥的长度，因为输入的长度是确定的，因此输出的密文长度应该也是确定的
+
+	if (sm2_decrypt(&conn->kenc_key.u.sm2_key, enced_pms, enced_pms_len,
+		conn->pre_master_secret, &pre_master_secret_len) != 1) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_decrypt_error);
+		return -1;
+	}
+	if (pre_master_secret_len != 48) {
+		error_print();
+		tls_send_alert(conn, TLS_alert_decrypt_error);
+		return -1;
+	}
+	sm3_update(&conn->sm3_ctx, conn->record + 5, conn->recordlen - 5);
+
+
+
+	return 1;
+}
+
 int tls_send_certificate_verify(TLS_CONNECT *conn)
 {
 	int ret;
diff --git a/tools/tlcp_client.c b/tools/tlcp_client.c
index 87377435..931a66d5 100644
--- a/tools/tlcp_client.c
+++ b/tools/tlcp_client.c
@@ -46,8 +46,32 @@ static const char *help =
 "  gmssl tlcp_client -host www.pbc.gov.cn -get / -outcerts certs.pem\n"
 "\n"
 "  gmssl tlcp_client -host www.pbc.gov.cn -port 443\n"
+"\n"
+"Examples\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out rootcakey.pem\n"
+"    gmssl certgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN ROOTCA -days 3650 -key rootcakey.pem -pass 1234 -out rootcacert.pem -key_usage keyCertSign -key_usage cRLSign -ca\n"
+"    gmssl sm2keygen -pass 1234 -out cakey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN \"Sub CA\" -key cakey.pem -pass 1234 -out careq.pem\n"
+"    gmssl reqsign -in careq.pem -days 365 -key_usage keyCertSign -ca -path_len_constraint 0 -cacert rootcacert.pem -key rootcakey.pem -pass 1234 -out cacert.pem\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out signkey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN localhost -key signkey.pem -pass 1234 -out signreq.pem\n"
+"    gmssl reqsign -in signreq.pem -days 365 -key_usage digitalSignature -cacert cacert.pem -key cakey.pem -pass 1234 -out signcert.pem\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out enckey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN localhost -key enckey.pem -pass 1234 -out encreq.pem\n"
+"    gmssl reqsign -in encreq.pem -days 365 -key_usage keyEncipherment -cacert cacert.pem -key cakey.pem -pass 1234 -out enccert.pem\n"
+"\n"
+"    cat signcert.pem > double_certs.pem\n"
+"    cat enccert.pem >> double_certs.pem\n"
+"    cat cacert.pem >> double_certs.pem\n"
+"\n"
+"    sudo gmssl tlcp_server -port 443 -cert double_certs.pem -key signkey.pem -pass 1234 -ex_key enckey.pem -ex_pass 1234\n"
+"    gmssl tlcp_client -host 127.0.0.1 -cacert rootcacert.pem\n"
 "\n";
 
+
 int tlcp_client_main(int argc, char *argv[])
 {
 	int ret = -1;
diff --git a/tools/tlcp_server.c b/tools/tlcp_server.c
index 1a1ffdc7..6eb12dea 100644
--- a/tools/tlcp_server.c
+++ b/tools/tlcp_server.c
@@ -20,6 +20,40 @@
 
 static const char *options = "[-port num] -cert file -key file [-pass str] -ex_key file [-ex_pass str] [-cacert file]";
 
+
+static const char *help =
+"Options\n"
+"\n"
+"    -port num              Listening port number, default 443\n"
+"    -cert file             Server's certificate chain in PEM format\n"
+"    -key file              Server's encrypted private key in PEM format\n"
+"    -pass str              Password to decrypt private key\n"
+"    -cacert file           CA certificate for client certificate verification\n"
+"\n"
+"Examples\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out rootcakey.pem\n"
+"    gmssl certgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN ROOTCA -days 3650 -key rootcakey.pem -pass 1234 -out rootcacert.pem -key_usage keyCertSign -key_usage cRLSign -ca\n"
+"    gmssl sm2keygen -pass 1234 -out cakey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN \"Sub CA\" -key cakey.pem -pass 1234 -out careq.pem\n"
+"    gmssl reqsign -in careq.pem -days 365 -key_usage keyCertSign -ca -path_len_constraint 0 -cacert rootcacert.pem -key rootcakey.pem -pass 1234 -out cacert.pem\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out signkey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN localhost -key signkey.pem -pass 1234 -out signreq.pem\n"
+"    gmssl reqsign -in signreq.pem -days 365 -key_usage digitalSignature -cacert cacert.pem -key cakey.pem -pass 1234 -out signcert.pem\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out enckey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN localhost -key enckey.pem -pass 1234 -out encreq.pem\n"
+"    gmssl reqsign -in encreq.pem -days 365 -key_usage keyEncipherment -cacert cacert.pem -key cakey.pem -pass 1234 -out enccert.pem\n"
+"\n"
+"    cat signcert.pem > double_certs.pem\n"
+"    cat enccert.pem >> double_certs.pem\n"
+"    cat cacert.pem >> double_certs.pem\n"
+"\n"
+"    sudo gmssl tlcp_server -port 443 -cert double_certs.pem -key signkey.pem -pass 1234 -ex_key enckey.pem -ex_pass 1234\n"
+"    gmssl tlcp_client -host 127.0.0.1 -cacert rootcacert.pem\n"
+"\n";
+
 int tlcp_server_main(int argc , char **argv)
 {
 	int ret = 1;
@@ -55,6 +89,7 @@ int tlcp_server_main(int argc , char **argv)
 	while (argc > 0) {
 		if (!strcmp(*argv, "-help")) {
 			printf("usage: %s %s\n", prog, options);
+			printf("%s\n", help);
 			return 0;
 		} else if (!strcmp(*argv, "-port")) {
 			if (--argc < 1) goto bad;
diff --git a/tools/tls12_client.c b/tools/tls12_client.c
index 5041dea2..c96eaec1 100644
--- a/tools/tls12_client.c
+++ b/tools/tls12_client.c
@@ -25,6 +25,40 @@ static const char *http_get =
 
 static const char *options = "-host str [-port num] [-cacert file] [-cert file -key file -pass str]";
 
+static const char *help =
+"Options\n"
+"\n"
+"    -host str              Server's hostname\n"
+"    -port num              Server's port number, default 443\n"
+"    -cacert file           Root CA certificate\n"
+"    -cert file             Client's certificate chain in PEM format\n"
+"    -key file              Client's encrypted private key in PEM format\n"
+"    -pass str              Password to decrypt private key\n"
+"\n"
+"Examples\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out rootcakey.pem\n"
+"    gmssl certgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN ROOTCA -days 3650 \\\n"
+"            -key rootcakey.pem -pass 1234 -out rootcacert.pem \\\n"
+"            -key_usage keyCertSign -key_usage cRLSign -ca\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out cakey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN \"Sub CA\" \\\n"
+"            -key cakey.pem -pass 1234 -out careq.pem\n"
+"    gmssl reqsign -in careq.pem -days 365 -key_usage keyCertSign -cacert rootcacert.pem -key rootcakey.pem -pass 1234 \\\n"
+"            -out cacert.pem -ca -path_len_constraint 0\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out signkey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN localhost -key signkey.pem -pass 1234 -out signreq.pem\n"
+"    gmssl reqsign -in signreq.pem -days 365 -key_usage digitalSignature -cacert cacert.pem -key cakey.pem -pass 1234 -out signcert.pem\n"
+"\n"
+"    cat signcert.pem > certs.pem\n"
+"    cat cacert.pem >> certs.pem\n"
+"\n"
+"    sudo gmssl tls12_server -port 4430 -cert certs.pem -key signkey.pem -pass 1234\n"
+"    gmssl tls12_client -host 127.0.0.1 -port 4430 -cacert rootcacert.pem\n"
+"\n";
+
 int tls12_client_main(int argc, char *argv[])
 {
 	int ret = -1;
@@ -53,6 +87,7 @@ int tls12_client_main(int argc, char *argv[])
 	while (argc >= 1) {
 		if (!strcmp(*argv, "-help")) {
 			printf("usage: %s %s\n", prog, options);
+			printf("%s\n", help);
 			return 0;
 		} else if (!strcmp(*argv, "-host")) {
 			if (--argc < 1) goto bad;
diff --git a/tools/tls12_server.c b/tools/tls12_server.c
index 944e7cbd..b10cd8f0 100644
--- a/tools/tls12_server.c
+++ b/tools/tls12_server.c
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
+ *  Copyright 2014-2026 The GmSSL Project. All Rights Reserved.
  *
  *  Licensed under the Apache License, Version 2.0 (the License); you may
  *  not use this file except in compliance with the License.
@@ -20,6 +20,40 @@
 
 static const char *options = "[-port num] -cert file -key file -pass str [-cacert file]";
 
+static const char *help =
+"Options\n"
+"\n"
+"    -port num              Listening port number, default 443\n"
+"    -cert file             Server's certificate chain in PEM format\n"
+"    -key file              Server's encrypted private key in PEM format\n"
+"    -pass str              Password to decrypt private key\n"
+"    -cacert file           CA certificate for client certificate verification\n"
+"\n"
+"Examples\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out rootcakey.pem\n"
+"    gmssl certgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN ROOTCA -days 3650 \\\n"
+"            -key rootcakey.pem -pass 1234 -out rootcacert.pem \\\n"
+"            -key_usage keyCertSign -key_usage cRLSign -ca\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out cakey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN \"Sub CA\" \\\n"
+"            -key cakey.pem -pass 1234 -out careq.pem\n"
+"    gmssl reqsign -in careq.pem -days 365 -key_usage keyCertSign -cacert rootcacert.pem -key rootcakey.pem -pass 1234 \\\n"
+"            -out cacert.pem -ca -path_len_constraint 0\n"
+"\n"
+"    gmssl sm2keygen -pass 1234 -out signkey.pem\n"
+"    gmssl reqgen -C CN -ST Beijing -L Haidian -O PKU -OU CS -CN localhost -key signkey.pem -pass 1234 -out signreq.pem\n"
+"    gmssl reqsign -in signreq.pem -days 365 -key_usage digitalSignature -cacert cacert.pem -key cakey.pem -pass 1234 -out signcert.pem\n"
+"\n"
+"    cat signcert.pem > certs.pem\n"
+"    cat cacert.pem >> certs.pem\n"
+"\n"
+"    sudo gmssl tls12_server -port 4430 -cert certs.pem -key signkey.pem -pass 1234\n"
+"    gmssl tls12_client -host 127.0.0.1 -port 4430 -cacert rootcacert.pem\n"
+"\n";
+
+
 int tls12_server_main(int argc , char **argv)
 {
 	int ret = 1;
@@ -52,6 +86,7 @@ int tls12_server_main(int argc , char **argv)
 	while (argc > 0) {
 		if (!strcmp(*argv, "-help")) {
 			printf("usage: %s %s\n", prog, options);
+			printf("%s\n", help);
 			return 0;
 		} else if (!strcmp(*argv, "-port")) {
 			if (--argc < 1) goto bad;