SSL连接建立过程分析(4)
2.13 SSL_connect
SSL_connect()这个函数完成SSL协商的客户端操作:
/* ssl/ssl_lib.c */
int SSL_connect(SSL *s)
{
if (s->handshake_func == 0)
/* Not properly initialized yet */
SSL_set_connect_state(s);
return(s->method->ssl_connect(s));
}
其中SSL_set_connect_state(s)函数初始化SSL协商处理:
void SSL_set_connect_state(SSL *s)
{
// 客户端
s->server=0;
s->shutdown=0;
// 初始化客户端状态值
s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
// 握手函数即是ssl_connect函数
s->handshake_func=s->method->ssl_connect;
/* clear the current cipher */
// 清除SSL读写加密算法上下文
ssl_clear_cipher_ctx(s);
}
因此最重要的就是ssl_connect()这两个成员函数，是前面SSLv[2][3]_client_method()函数中定义
的，如对于SSLv23方法，处理函数分别为ssl23_connect()函数，其它SSLv2和SSLv3方法分别对应ssl2_connect()
和ssl3_connect()，后两者就没有协商过程了，ssl23_connect()实际在协商确定协议版本后也是调用ssl2[3]
_connect()。掌握了服务器端的accept过程，理解客户端的connect过程就简单了。
/* ssl/s23_clnt.c */
int ssl23_connect(SSL *s)
{
BUF_MEM *buf=NULL;
unsigned long Time=time(NULL);
void (*cb)(const SSL *ssl,int type,int val)=NULL;
int ret= -1;
int new_state,state;
// 和服务器端一样进行基本的初始化
RAND_add(&Time,sizeof(Time),0);
ERR_clear_error();
clear_sys_error();
if (s->info_callback != NULL)
cb=s->info_callback;
else if (s->ctx->info_callback != NULL)
cb=s->ctx->info_callback;
s->in_handshake++;
if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
for (;;)
{
state=s->state;
// 在SSL_set_connect_state中s->state被初始化为SSL_ST_CONNECT|SSL_ST_BEFORE
switch(s->state)
{
case SSL_ST_BEFORE:
case SSL_ST_CONNECT:
case SSL_ST_BEFORE|SSL_ST_CONNECT:
case SSL_ST_OK|SSL_ST_CONNECT:
// 进行基本初始化,分配缓冲区
if (s->session != NULL)
{
SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
ret= -1;
goto end;
}
s->server=0;
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
/* s->version=TLS1_VERSION; */
s->type=SSL_ST_CONNECT;
if (s->init_buf == NULL)
{
if ((buf=BUF_MEM_new()) == NULL)
{
ret= -1;
goto end;
}
if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
{
ret= -1;
goto end;
}
s->init_buf=buf;
buf=NULL;
}
if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
ssl3_init_finished_mac(s);
// SSL客户端状态转为准备发送HELLO信息
s->state=SSL23_ST_CW_CLNT_HELLO_A;
s->ctx->stats.sess_connect++;
s->init_num=0;
break;
case SSL23_ST_CW_CLNT_HELLO_A:
case SSL23_ST_CW_CLNT_HELLO_B:
// 发送客户端的HELLO信息
s->shutdown=0;
ret=ssl23_client_hello(s);
if (ret <= 0) goto end;
// 转为准备接收服务器端的HELLO状态
s->state=SSL23_ST_CR_SRVR_HELLO_A;
s->init_num=0;
break;
case SSL23_ST_CR_SRVR_HELLO_A:
case SSL23_ST_CR_SRVR_HELLO_B:
// 读取服务器端的HELLO信息,完成SSL握手协商
ret=ssl23_get_server_hello(s);
if (ret >= 0) cb=NULL;
goto end;
/* break; */
default:
SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
ret= -1;
goto end;
/* break; */
}
if (s->debug) { (void)BIO_flush(s->wbio); }
if ((cb != NULL) && (s->state != state))
{
new_state=s->state;
s->state=state;
cb(s,SSL_CB_CONNECT_LOOP,1);
s->state=new_state;
}
}
end:
s->in_handshake--;
if (buf != NULL)
BUF_MEM_free(buf);
if (cb != NULL)
cb(s,SSL_CB_CONNECT_EXIT,ret);
return(ret);
}
ssl23_client_hello()函数发送客户端的HELLO信息:
/* ssl/s23_clnt.c */
static int ssl23_client_hello(SSL *s)
{
unsigned char *buf;
unsigned char *p,*d;
int i,ch_len;
int ret;
buf=(unsigned char *)s->init_buf->data;
if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
{
// 准备发送HELLO, 构造发送缓冲区的数据,数据格式见SSL_accept一节中的说明
p=s->s3->client_random;
RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE);
/* Do the message type and length last */
d= &(buf[2]);
// p指向SSL握手记录头(11字节长)后的第一字节处
p=d+9;
// 消息类型
*(d++)=SSL2_MT_CLIENT_HELLO;
// 填写客户端版本号
if (!(s->options & SSL_OP_NO_TLSv1))
{
*(d++)=TLS1_VERSION_MAJOR;
*(d++)=TLS1_VERSION_MINOR;
s->client_version=TLS1_VERSION;
}
else if (!(s->options & SSL_OP_NO_SSLv3))
{
*(d++)=SSL3_VERSION_MAJOR;
*(d++)=SSL3_VERSION_MINOR;
s->client_version=SSL3_VERSION;
}
else if (!(s->options & SSL_OP_NO_SSLv2))
{
*(d++)=SSL2_VERSION_MAJOR;
*(d++)=SSL2_VERSION_MINOR;
s->client_version=SSL2_VERSION;
}
else
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
return(-1);
}
// 填写cipher_specs信息
/* Ciphers supported */
i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p);
if (i == 0)
{
/* no ciphers */
SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
return(-1);
}
s2n(i,d);
p+=i;
// 填写会话ID
/* put in the session-id, zero since there is no
* reuse. */
s2n(0,d);
if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
ch_len=SSL2_CHALLENGE_LENGTH;
else
ch_len=SSL2_MAX_CHALLENGE_LENGTH;
// 填写挑战信息
/* write out sslv2 challenge */
if (SSL3_RANDOM_SIZE < ch_len)
i=SSL3_RANDOM_SIZE;
else
i=ch_len;
s2n(i,d);
memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
p+=i;
// 数据长度
i= p- &(buf[2]);
buf[0]=((i>>8)&0xff)|0x80;
buf[1]=(i&0xff);
// 数据完成,状态转为HELLO B准备发送
s->state=SSL23_ST_CW_CLNT_HELLO_B;
/* number of bytes to write */
s->init_num=i+2;
s->init_off=0;
ssl3_finish_mac(s,&(buf[2]),i);
}
/* SSL3_ST_CW_CLNT_HELLO_B */
// 发送HELLO数据
ret = ssl23_write_bytes(s);
if (ret >= 2)
if (s->msg_callback)
s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg); /* CLIENT-HELLO */
return ret;
}
ssl23_get_server_hello()接收服务器端的回应，识别服务器的SSL版本，最后再相应调用ssl2_connect()或ssl3_connect()函数。
/* ssl/s23_clnt.c */
static int ssl23_get_server_hello(SSL *s)
{
char buf[8];
unsigned char *p;
int i;
int n;
// 读7字节的服务器端数据
n=ssl23_read_bytes(s,7);
if (n != 7) return(n);
p=s->packet;
memcpy(buf,p,n);
if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
(p[5] == 0x00) && (p[6] == 0x02))
{
// 服务器是SSL2版本
#ifdef OPENSSL_NO_SSL2
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
goto err;
#else
/* we are talking sslv2 */
/* we need to clean up the SSLv3 setup and put in the
* sslv2 stuff. */
int ch_len;
if (s->options & SSL_OP_NO_SSLv2)
{
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
goto err;
}
// 初始化SSL结构中的SSL2支持，ssl_connect将为ssl2_connect
if (s->s2 == NULL)
{
if (!ssl2_new(s))
goto err;
}
else
ssl2_clear(s);
if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
ch_len=SSL2_CHALLENGE_LENGTH;
else
ch_len=SSL2_MAX_CHALLENGE_LENGTH;
/* write out sslv2 challenge */
i=(SSL3_RANDOM_SIZE < ch_len)
?SSL3_RANDOM_SIZE:ch_len;
s->s2->challenge_length=i;
memcpy(s->s2->challenge,
&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
if (s->s3 != NULL) ssl3_free(s);
if (!BUF_MEM_grow_clean(s->init_buf,
SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
{
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
goto err;
}
s->state=SSL2_ST_GET_SERVER_HELLO_A;
if (!(s->client_version == SSL2_VERSION))
/* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
s->s2->ssl2_rollback=1;
/* setup the 5 bytes we have read so we get them from
* the sslv2 buffer */
s->rstate=SSL_ST_READ_HEADER;
s->packet_length=n;
s->packet= &(s->s2->rbuf[0]);
memcpy(s->packet,buf,n);
s->s2->rbuf_left=n;
s->s2->rbuf_offs=0;
/* we have already written one */
s->s2->write_sequence=1;
s->method=SSLv2_client_method();
s->handshake_func=s->method->ssl_connect;
#endif
}
else if ((p[0] == SSL3_RT_HANDSHAKE) &&
(p[1] == SSL3_VERSION_MAJOR) &&
((p[2] == SSL3_VERSION_MINOR) ||
(p[2] == TLS1_VERSION_MINOR)) &&
(p[5] == SSL3_MT_SERVER_HELLO))
{
// 服务器版本为SSL3或TLS1，ssl_connect将为ssl3_connect
/* we have sslv3 or tls1 */
if (!ssl_init_wbio_buffer(s,1)) goto err;
/* we are in this state */
s->state=SSL3_ST_CR_SRVR_HELLO_A;
/* put the 5 bytes we have read into the input buffer
* for SSLv3 */
s->rstate=SSL_ST_READ_HEADER;
s->packet_length=n;
s->packet= &(s->s3->rbuf.buf[0]);
memcpy(s->packet,buf,n);
s->s3->rbuf.left=n;
s->s3->rbuf.offset=0;
if ((p[2] == SSL3_VERSION_MINOR) &&
!(s->options & SSL_OP_NO_SSLv3))
{
s->version=SSL3_VERSION;
s->method=SSLv3_client_method();
}
else if ((p[2] == TLS1_VERSION_MINOR) &&
!(s->options & SSL_OP_NO_TLSv1))
{
s->version=TLS1_VERSION;
s->method=TLSv1_client_method();
}
else
{
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
goto err;
}
s->handshake_func=s->method->ssl_connect;
}
else if ((p[0] == SSL3_RT_ALERT) &&
(p[1] == SSL3_VERSION_MAJOR) &&
((p[2] == SSL3_VERSION_MINOR) ||
(p[2] == TLS1_VERSION_MINOR)) &&
(p[3] == 0) &&
(p[4] == 2))
{
// SSL告警信息
void (*cb)(const SSL *ssl,int type,int val)=NULL;
int j;
/* An alert */
if (s->info_callback != NULL)
cb=s->info_callback;
else if (s->ctx->info_callback != NULL)
cb=s->ctx->info_callback;
i=p[5];
if (cb != NULL)
{
j=(i<<8)|p[6];
cb(s,SSL_CB_READ_ALERT,j);
}
s->rwstate=SSL_NOTHING;
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
goto err;
}
else
{
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
goto err;
}
s->init_num=0;
/* Since, if we are sending a ssl23 client hello, we are not
* reusing a session-id */
if (!ssl_get_new_session(s,0))
goto err;
s->first_packet=1;
// 递归调用SSL_connect，实际将执行ssl2_connect()或ssl3_connect()
return(SSL_connect(s));
err:
return(-1);
}
举例ssl3_conect()函数定义如下，ssl2_connect()就不分析了:
/* ssl/s3_clnt.c */
int ssl3_connect(SSL *s)
{
BUF_MEM *buf=NULL;
unsigned long Time=time(NULL),l;
long num1;
void (*cb)(const SSL *ssl,int type,int val)=NULL;
int ret= -1;
int new_state,state,skip=0;;
// 对SSL3连接的初始化
RAND_add(&Time,sizeof(Time),0);
ERR_clear_error();
clear_sys_error();
if (s->info_callback != NULL)
cb=s->info_callback;
else if (s->ctx->info_callback != NULL)
cb=s->ctx->info_callback;
s->in_handshake++;
if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
for (;;)
{
state=s->state;
switch(s->state)
{
case SSL_ST_RENEGOTIATE:
// 重协商的话从头开始, 注意break是注释掉的
s->new_session=1;
s->state=SSL_ST_CONNECT;
s->ctx->stats.sess_connect_renegotiate++;
/* break */
// 初始状态应该是SSL_ST_BEFORE|SSL_ST_CONNECT
case SSL_ST_BEFORE:
case SSL_ST_CONNECT:
case SSL_ST_BEFORE|SSL_ST_CONNECT:
case SSL_ST_OK|SSL_ST_CONNECT:
// server=0表示是客户端
s->server=0;
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
// 如果本地版本不是SSL3则出错
if ((s->version & 0xff00 ) != 0x0300)
{
SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
ret = -1;
goto end;
}
/* s->version=SSL3_VERSION; */
s->type=SSL_ST_CONNECT;
// 初始化连接缓冲区
if (s->init_buf == NULL)
{
if ((buf=BUF_MEM_new()) == NULL)
{
ret= -1;
goto end;
}
if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
{
ret= -1;
goto end;
}
s->init_buf=buf;
buf=NULL;
}
if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
/* setup buffing BIO */
if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
/* don't push the buffering BIO quite yet */
ssl3_init_finished_mac(s);
// 准备发送HELLO信息
s->state=SSL3_ST_CW_CLNT_HELLO_A;
s->ctx->stats.sess_connect++;
s->init_num=0;
break;
case SSL3_ST_CW_CLNT_HELLO_A:
case SSL3_ST_CW_CLNT_HELLO_B:
// 该状态发送客户端SSL3信息
s->shutdown=0;
ret=ssl3_client_hello(s);
if (ret <= 0) goto end;
// 发送成功,状态转为准备接收服务器的HELLO回应
s->state=SSL3_ST_CR_SRVR_HELLO_A;
s->init_num=0;
/* turn on buffering for the next lot of output */
if (s->bbio != s->wbio)
s->wbio=BIO_push(s->bbio,s->wbio);
break;
case SSL3_ST_CR_SRVR_HELLO_A:
case SSL3_ST_CR_SRVR_HELLO_B:
// 该状态下接收服务器发送的HELLO信息
ret=ssl3_get_server_hello(s);
if (ret <= 0) goto end;
if (s->hit)
// 如果是reuse的连接,状态转为接收结束
s->state=SSL3_ST_CR_FINISHED_A;
else
// 否则状态转为准备接收服务器的证书
s->state=SSL3_ST_CR_CERT_A;
s->init_num=0;
break;
case SSL3_ST_CR_CERT_A:
case SSL3_ST_CR_CERT_B:
// 该状态下接收服务器发送的证书
/* Check if it is anon DH */
if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
{
ret=ssl3_get_server_certificate(s);
if (ret <= 0) goto end;
}
else
skip=1;
// 状态转为接收密钥交换信息
s->state=SSL3_ST_CR_KEY_EXCH_A;
s->init_num=0;
break;
case SSL3_ST_CR_KEY_EXCH_A:
case SSL3_ST_CR_KEY_EXCH_B:
// 该状态下接收密钥交换信息
ret=ssl3_get_key_exchange(s);
if (ret <= 0) goto end;
// 状态转为接收证书请求
s->state=SSL3_ST_CR_CERT_REQ_A;
s->init_num=0;
/* at this point we check that we have the
* required stuff from the server */
if (!ssl3_check_cert_and_algorithm(s))
{
ret= -1;
goto end;
}
break;
case SSL3_ST_CR_CERT_REQ_A:
case SSL3_ST_CR_CERT_REQ_B:
// 该状态下接收服务器的证书请求
ret=ssl3_get_certificate_request(s);
if (ret <= 0) goto end;
s->state=SSL3_ST_CR_SRVR_DONE_A;
s->init_num=0;
break;
case SSL3_ST_CR_SRVR_DONE_A:
case SSL3_ST_CR_SRVR_DONE_B:
// 该状态下接收服务器信息结束
ret=ssl3_get_server_done(s);
if (ret <= 0) goto end;
if (s->s3->tmp.cert_req)
// 发送客户端证书
s->state=SSL3_ST_CW_CERT_A;
else
// 发送密钥交换信息
s->state=SSL3_ST_CW_KEY_EXCH_A;
s->init_num=0;
break;
case SSL3_ST_CW_CERT_A:
case SSL3_ST_CW_CERT_B:
case SSL3_ST_CW_CERT_C:
case SSL3_ST_CW_CERT_D:
// 该状态下发送客户端证书
ret=ssl3_send_client_certificate(s);
if (ret <= 0) goto end;
// 状态转为发送密钥交换信息
s->state=SSL3_ST_CW_KEY_EXCH_A;
s->init_num=0;
break;
case SSL3_ST_CW_KEY_EXCH_A:
case SSL3_ST_CW_KEY_EXCH_B:
// 该状态下发送密钥交换信息
ret=ssl3_send_client_key_exchange(s);
if (ret <= 0) goto end;
// 加密算法
l=s->s3->tmp.new_cipher->algorithms;
/* EAY EAY EAY need to check for DH fix cert
* sent back */
/* For TLS, cert_req is set to 2, so a cert chain
* of nothing is sent, but no verify packet is sent */
if (s->s3->tmp.cert_req == 1)
{
// 发送证书验证
s->state=SSL3_ST_CW_CERT_VRFY_A;
}
else
{
// TLS, 不用发送证书认证信息,直接转为修改算法状态
s->state=SSL3_ST_CW_CHANGE_A;
s->s3->change_cipher_spec=0;
}
s->init_num=0;
break;
case SSL3_ST_CW_CERT_VRFY_A:
case SSL3_ST_CW_CERT_VRFY_B:
// 该状态发送证书验证信息
ret=ssl3_send_client_verify(s);
if (ret <= 0) goto end;
// 状态转为发送修改算法信息
s->state=SSL3_ST_CW_CHANGE_A;
s->init_num=0;
s->s3->change_cipher_spec=0;
break;
case SSL3_ST_CW_CHANGE_A:
case SSL3_ST_CW_CHANGE_B:
// 该状态下发送修改算法信息
ret=ssl3_send_change_cipher_spec(s,
SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
if (ret <= 0) goto end;
// 状态转为发送结束
s->state=SSL3_ST_CW_FINISHED_A;
s->init_num=0;
// 设置会话加密算法
s->session->cipher=s->s3->tmp.new_cipher;
if (s->s3->tmp.new_compression == NULL)
s->session->compress_meth=0;
else
s->session->compress_meth=
s->s3->tmp.new_compression->id;
if (!s->method->ssl3_enc->setup_key_block(s))
{
ret= -1;
goto end;
}
if (!s->method->ssl3_enc->change_cipher_state(s,
SSL3_CHANGE_CIPHER_CLIENT_WRITE))
{
ret= -1;
goto end;
}
break;
case SSL3_ST_CW_FINISHED_A:
case SSL3_ST_CW_FINISHED_B:
// 该状态下发送协商结束信息
ret=ssl3_send_finished(s,
SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
s->method->ssl3_enc->client_finished_label,
s->method->ssl3_enc->client_finished_label_len);
if (ret <= 0) goto end;
// 转为刷新写缓冲状态
s->state=SSL3_ST_CW_FLUSH;
/* clear flags */
s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
if (s->hit)
{
// 如果是reuse的会话, FLUSH后的下一个状态转为协商成功
s->s3->tmp.next_state=SSL_ST_OK;
if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
{
s->state=SSL_ST_OK;
s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
s->s3->delay_buf_pop_ret=0;
}
}
else
{
// 否则状态转为准备接收服务器的协商结束信息
s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
}
s->init_num=0;
break;
case SSL3_ST_CR_FINISHED_A:
case SSL3_ST_CR_FINISHED_B:
// 该状态接收服务器发送的协商结束信息
ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
SSL3_ST_CR_FINISHED_B);
if (ret <= 0) goto end;
if (s->hit)
// 如果会话是reuse的,状态转为发送算法
s->state=SSL3_ST_CW_CHANGE_A;
else
// 否则协商成功
s->state=SSL_ST_OK;
s->init_num=0;
break;
case SSL3_ST_CW_FLUSH:
// 该状态下刷新写缓冲区
/* number of bytes to be flushed */
num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
if (num1 > 0)
{
s->rwstate=SSL_WRITING;
num1=BIO_flush(s->wbio);
if (num1 <= 0) { ret= -1; goto end; }
s->rwstate=SSL_NOTHING;
}
s->state=s->s3->tmp.next_state;
break;
case SSL_ST_OK:
// 该状态下协商成功结束
// 释放协商时分配的资源
/* clean a few things up */
ssl3_cleanup_key_block(s);
if (s->init_buf != NULL)
{
BUF_MEM_free(s->init_buf);
s->init_buf=NULL;
}
/* If we are not 'joining' the last two packets,
* remove the buffering now */
if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
ssl_free_wbio_buffer(s);
/* else do it later in ssl3_write */
s->init_num=0;
s->new_session=0;
ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
if (s->hit) s->ctx->stats.sess_hit++;
ret=1;
/* s->server=0; */
s->handshake_func=ssl3_connect;
s->ctx->stats.sess_connect_good++;
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
goto end;
/* break; */
default:
SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
ret= -1;
goto end;
/* break; */
}
/* did we do anything */
if (!s->s3->tmp.reuse_message && !skip)
{
if (s->debug)
{
if ((ret=BIO_flush(s->wbio)) <= 0)
goto end;
}
if ((cb != NULL) && (s->state != state))
{
new_state=s->state;
s->state=state;
cb(s,SSL_CB_CONNECT_LOOP,1);
s->state=new_state;
}
}
skip=0;
}
end:
s->in_handshake--;
if (buf != NULL)
BUF_MEM_free(buf);
if (cb != NULL)
cb(s,SSL_CB_CONNECT_EXIT,ret);
return(ret);
}
...... 待续 ......
