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websocket_common.c
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#include "websocket_common.h"
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netdb.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <stdio.h>
#include <netinet/tcp.h>
//================================================== 加密方法 sha1哈希 ==================================================
typedef struct SHA1Context{
unsigned Message_Digest[5];
unsigned Length_Low;
unsigned Length_High;
unsigned char Message_Block[64];
int Message_Block_Index;
int Computed;
int Corrupted;
} SHA1Context;
#define SHA1CircularShift(bits,word) ((((word) << (bits)) & 0xFFFFFFFF) | ((word) >> (32-(bits))))
void SHA1ProcessMessageBlock(SHA1Context *context)
{
const unsigned K[] = {0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6 };
int t;
unsigned temp;
unsigned W[80];
unsigned A, B, C, D, E;
for(t = 0; t < 16; t++)
{
W[t] = ((unsigned) context->Message_Block[t * 4]) << 24;
W[t] |= ((unsigned) context->Message_Block[t * 4 + 1]) << 16;
W[t] |= ((unsigned) context->Message_Block[t * 4 + 2]) << 8;
W[t] |= ((unsigned) context->Message_Block[t * 4 + 3]);
}
for(t = 16; t < 80; t++)
W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
A = context->Message_Digest[0];
B = context->Message_Digest[1];
C = context->Message_Digest[2];
D = context->Message_Digest[3];
E = context->Message_Digest[4];
for(t = 0; t < 20; t++)
{
temp = SHA1CircularShift(5,A) + ((B & C) | ((~B) & D)) + E + W[t] + K[0];
temp &= 0xFFFFFFFF;
E = D;
D = C;
C = SHA1CircularShift(30,B);
B = A;
A = temp;
}
for(t = 20; t < 40; t++)
{
temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[1];
temp &= 0xFFFFFFFF;
E = D;
D = C;
C = SHA1CircularShift(30,B);
B = A;
A = temp;
}
for(t = 40; t < 60; t++)
{
temp = SHA1CircularShift(5,A) + ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2];
temp &= 0xFFFFFFFF;
E = D;
D = C;
C = SHA1CircularShift(30,B);
B = A;
A = temp;
}
for(t = 60; t < 80; t++)
{
temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[3];
temp &= 0xFFFFFFFF;
E = D;
D = C;
C = SHA1CircularShift(30,B);
B = A;
A = temp;
}
context->Message_Digest[0] = (context->Message_Digest[0] + A) & 0xFFFFFFFF;
context->Message_Digest[1] = (context->Message_Digest[1] + B) & 0xFFFFFFFF;
context->Message_Digest[2] = (context->Message_Digest[2] + C) & 0xFFFFFFFF;
context->Message_Digest[3] = (context->Message_Digest[3] + D) & 0xFFFFFFFF;
context->Message_Digest[4] = (context->Message_Digest[4] + E) & 0xFFFFFFFF;
context->Message_Block_Index = 0;
}
void SHA1Reset(SHA1Context *context)
{
context->Length_Low = 0;
context->Length_High = 0;
context->Message_Block_Index = 0;
context->Message_Digest[0] = 0x67452301;
context->Message_Digest[1] = 0xEFCDAB89;
context->Message_Digest[2] = 0x98BADCFE;
context->Message_Digest[3] = 0x10325476;
context->Message_Digest[4] = 0xC3D2E1F0;
context->Computed = 0;
context->Corrupted = 0;
}
void SHA1PadMessage(SHA1Context *context)
{
if (context->Message_Block_Index > 55)
{
context->Message_Block[context->Message_Block_Index++] = 0x80;
while(context->Message_Block_Index < 64) context->Message_Block[context->Message_Block_Index++] = 0;
SHA1ProcessMessageBlock(context);
while(context->Message_Block_Index < 56) context->Message_Block[context->Message_Block_Index++] = 0;
}
else
{
context->Message_Block[context->Message_Block_Index++] = 0x80;
while(context->Message_Block_Index < 56) context->Message_Block[context->Message_Block_Index++] = 0;
}
context->Message_Block[56] = (context->Length_High >> 24 ) & 0xFF;
context->Message_Block[57] = (context->Length_High >> 16 ) & 0xFF;
context->Message_Block[58] = (context->Length_High >> 8 ) & 0xFF;
context->Message_Block[59] = (context->Length_High) & 0xFF;
context->Message_Block[60] = (context->Length_Low >> 24 ) & 0xFF;
context->Message_Block[61] = (context->Length_Low >> 16 ) & 0xFF;
context->Message_Block[62] = (context->Length_Low >> 8 ) & 0xFF;
context->Message_Block[63] = (context->Length_Low) & 0xFF;
SHA1ProcessMessageBlock(context);
}
int SHA1Result(SHA1Context *context)
{
if (context->Corrupted)
{
return 0;
}
if (!context->Computed)
{
SHA1PadMessage(context);
context->Computed = 1;
}
return 1;
}
void SHA1Input(SHA1Context *context,const char *message_array,unsigned length){
if (!length)
return;
if (context->Computed || context->Corrupted)
{
context->Corrupted = 1;
return;
}
while(length-- && !context->Corrupted)
{
context->Message_Block[context->Message_Block_Index++] = (*message_array & 0xFF);
context->Length_Low += 8;
context->Length_Low &= 0xFFFFFFFF;
if (context->Length_Low == 0)
{
context->Length_High++;
context->Length_High &= 0xFFFFFFFF;
if (context->Length_High == 0) context->Corrupted = 1;
}
if (context->Message_Block_Index == 64)
{
SHA1ProcessMessageBlock(context);
}
message_array++;
}
}
/*
int sha1_hash(const char *source, char *lrvar){// Main
SHA1Context sha;
char buf[128];
SHA1Reset(&sha);
SHA1Input(&sha, source, strlen(source));
if (!SHA1Result(&sha)){
printf("SHA1 ERROR: Could not compute message digest");
return -1;
} else {
memset(buf,0,sizeof(buf));
sprintf(buf, "%08X%08X%08X%08X%08X", sha.Message_Digest[0],sha.Message_Digest[1],
sha.Message_Digest[2],sha.Message_Digest[3],sha.Message_Digest[4]);
//lr_save_string(buf, lrvar);
return strlen(buf);
}
}
*/
char * sha1_hash(const char *source){ // Main
SHA1Context sha;
char *buf;//[128];
SHA1Reset(&sha);
SHA1Input(&sha, source, strlen(source));
if (!SHA1Result(&sha))
{
printf("SHA1 ERROR: Could not compute message digest");
return NULL;
}
else
{
buf = (char *)malloc(128);
memset(buf, 0, 128);
sprintf(buf, "%08X%08X%08X%08X%08X", sha.Message_Digest[0],sha.Message_Digest[1],
sha.Message_Digest[2],sha.Message_Digest[3],sha.Message_Digest[4]);
//lr_save_string(buf, lrvar);
//return strlen(buf);
return buf;
}
}
int tolower(int c)
{
if (c >= 'A' && c <= 'Z')
{
return c + 'a' - 'A';
}
else
{
return c;
}
}
int htoi(const char s[], int start, int len)
{
int i, j;
int n = 0;
if (s[0] == '0' && (s[1]=='x' || s[1]=='X')) //判断是否有前导0x或者0X
{
i = 2;
}
else
{
i = 0;
}
i+=start;
j=0;
for (; (s[i] >= '0' && s[i] <= '9')
|| (s[i] >= 'a' && s[i] <= 'f') || (s[i] >='A' && s[i] <= 'F');++i)
{
if(j>=len)
{
break;
}
if (tolower(s[i]) > '9')
{
n = 16 * n + (10 + tolower(s[i]) - 'a');
}
else
{
n = 16 * n + (tolower(s[i]) - '0');
}
j++;
}
return n;
}
//================================================== 加密方法BASE64 ==================================================
//base64编/解码用的基础字符集
const char base64char[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/*******************************************************************************
* 名称: base64_encode
* 功能: ascii编码为base64格式
* 形参: bindata : ascii字符串输入
* base64 : base64字符串输出
* binlength : bindata的长度
* 返回: base64字符串长度
* 说明: 无
******************************************************************************/
int base64_encode( const unsigned char *bindata, char *base64, int binlength)
{
int i, j;
unsigned char current;
for ( i = 0, j = 0 ; i < binlength ; i += 3 )
{
current = (bindata[i] >> 2) ;
current &= (unsigned char)0x3F;
base64[j++] = base64char[(int)current];
current = ( (unsigned char)(bindata[i] << 4 ) ) & ( (unsigned char)0x30 ) ;
if ( i + 1 >= binlength )
{
base64[j++] = base64char[(int)current];
base64[j++] = '=';
base64[j++] = '=';
break;
}
current |= ( (unsigned char)(bindata[i+1] >> 4) ) & ( (unsigned char) 0x0F );
base64[j++] = base64char[(int)current];
current = ( (unsigned char)(bindata[i+1] << 2) ) & ( (unsigned char)0x3C ) ;
if ( i + 2 >= binlength )
{
base64[j++] = base64char[(int)current];
base64[j++] = '=';
break;
}
current |= ( (unsigned char)(bindata[i+2] >> 6) ) & ( (unsigned char) 0x03 );
base64[j++] = base64char[(int)current];
current = ( (unsigned char)bindata[i+2] ) & ( (unsigned char)0x3F ) ;
base64[j++] = base64char[(int)current];
}
base64[j] = '\0';
return j;
}
/*******************************************************************************
* 名称: base64_decode
* 功能: base64格式解码为ascii
* 形参: base64 : base64字符串输入
* bindata : ascii字符串输出
* 返回: 解码出来的ascii字符串长度
* 说明: 无
******************************************************************************/
int base64_decode( const char *base64, unsigned char *bindata)
{
int i, j;
unsigned char k;
unsigned char temp[4];
for ( i = 0, j = 0; base64[i] != '\0' ; i += 4 )
{
memset( temp, 0xFF, sizeof(temp) );
for ( k = 0 ; k < 64 ; k ++ )
{
if ( base64char[k] == base64[i] )
temp[0]= k;
}
for ( k = 0 ; k < 64 ; k ++ )
{
if ( base64char[k] == base64[i+1] )
temp[1]= k;
}
for ( k = 0 ; k < 64 ; k ++ )
{
if ( base64char[k] == base64[i+2] )
temp[2]= k;
}
for ( k = 0 ; k < 64 ; k ++ )
{
if ( base64char[k] == base64[i+3] )
temp[3]= k;
}
bindata[j++] = ((unsigned char)(((unsigned char)(temp[0] << 2))&0xFC)) | \
((unsigned char)((unsigned char)(temp[1]>>4)&0x03));
if ( base64[i+2] == '=' )
break;
bindata[j++] = ((unsigned char)(((unsigned char)(temp[1] << 4))&0xF0)) | \
((unsigned char)((unsigned char)(temp[2]>>2)&0x0F));
if ( base64[i+3] == '=' )
break;
bindata[j++] = ((unsigned char)(((unsigned char)(temp[2] << 6))&0xF0)) | \
((unsigned char)(temp[3]&0x3F));
}
return j;
}
//==============================================================================================================
//================================================== websocket ==================================================
//==============================================================================================================
// 连接服务器
#define REPORT_LOGIN_CONNECT_TIMEOUT 1000 // 登录连接超时设置 1000ms
#define REPORT_LOGIN_RESPOND_TIMEOUT (1000 + REPORT_LOGIN_CONNECT_TIMEOUT) // 登录等待回应超时设置 1000ms
// 指令发收
#define REPORT_ANALYSIS_ERR_RESEND_DELAY 500 // 接收到回复内容但解析不通过, 延时 一段时间后重发指令 单位ms
// 生成握手key的长度
#define WEBSOCKET_SHAKE_KEY_LEN 16
/*
// websocket根据data[0]判别数据包类型
typedef enum{
WCT_MINDATA = -20, // 0x0：标识一个中间数据包
WCT_TXTDATA = -19, // 0x1：标识一个text类型数据包
WCT_BINDATA = -18, // 0x2：标识一个binary类型数据包
WCT_DISCONN = -17, // 0x8：标识一个断开连接类型数据包
WCT_PING = -16, // 0x8：标识一个断开连接类型数据包
WCT_PONG = -15, // 0xA：表示一个pong类型数据包
WCT_ERR = -1,
WCT_NULL = 0
}Websocket_CommunicationType;*/
/*******************************************************************************
* 名称: webSocket_getRandomString
* 功能: 生成随机字符串
* 形参: *buf：随机字符串存储到
* len : 生成随机字符串长度
* 返回: 无
* 说明: 无
******************************************************************************/
void webSocket_getRandomString(unsigned char *buf, unsigned int len)
{
unsigned int i;
unsigned char temp;
srand((int)time(0));
for(i = 0; i < len; i++)
{
temp = (unsigned char)(rand()%256);
if(temp == 0) // 随机数不要0, 0 会干扰对字符串长度的判断
temp = 128;
buf[i] = temp;
}
}
/*******************************************************************************
* 名称: webSocket_buildShakeKey
* 功能: client端使用随机数构建握手用的key
* 形参: *key：随机生成的握手key
* 返回: key的长度
* 说明: 无
******************************************************************************/
int webSocket_buildShakeKey(unsigned char *key)
{
unsigned char tempKey[WEBSOCKET_SHAKE_KEY_LEN] = {0};
webSocket_getRandomString(tempKey, WEBSOCKET_SHAKE_KEY_LEN);
return base64_encode((const unsigned char *)tempKey, (char *)key, WEBSOCKET_SHAKE_KEY_LEN);
}
/*******************************************************************************
* 名称: webSocket_buildRespondShakeKey
* 功能: server端在接收client端的key后,构建回应用的key
* 形参: *acceptKey：来自客户端的key字符串
* acceptKeyLen : 长度
* *respondKey : 在 acceptKey 之后加上 GUID, 再sha1哈希, 再转成base64得到 respondKey
* 返回: respondKey的长度(肯定比acceptKey要长)
* 说明: 无
******************************************************************************/
int webSocket_buildRespondShakeKey(unsigned char *acceptKey, unsigned int acceptKeyLen, unsigned char *respondKey)
{
char *clientKey;
char *sha1DataTemp;
char *sha1Data;
int i, n;
const char GUID[] = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
unsigned int GUIDLEN;
if(acceptKey == NULL)
return 0;
GUIDLEN = sizeof(GUID);
clientKey = (char *)calloc(1, sizeof(char)*(acceptKeyLen + GUIDLEN + 10));
memset(clientKey, 0, (acceptKeyLen + GUIDLEN + 10));
//
memcpy(clientKey, acceptKey, acceptKeyLen);
memcpy(&clientKey[acceptKeyLen], GUID, GUIDLEN);
clientKey[acceptKeyLen + GUIDLEN] = '\0';
//
sha1DataTemp = sha1_hash(clientKey);
n = strlen(sha1DataTemp);
sha1Data = (char *)calloc(1, n / 2 + 1);
memset(sha1Data, 0, n / 2 + 1);
//
for(i = 0; i < n; i += 2)
sha1Data[ i / 2 ] = htoi(sha1DataTemp, i, 2);
n = base64_encode((const unsigned char *)sha1Data, (char *)respondKey, (n / 2));
//
free(sha1DataTemp);
free(sha1Data);
free(clientKey);
return n;
}
/*******************************************************************************
* 名称: webSocket_matchShakeKey
* 功能: client端收到来自服务器回应的key后进行匹配,以验证握手成功
* 形参: *myKey：client端请求握手时发给服务器的key
* myKeyLen : 长度
* *acceptKey : 服务器回应的key
* acceptKeyLen : 长度
* 返回: 0 成功 -1 失败
* 说明: 无
******************************************************************************/
int webSocket_matchShakeKey(unsigned char *myKey, unsigned int myKeyLen, unsigned char *acceptKey, unsigned int acceptKeyLen)
{
int retLen;
unsigned char tempKey[256] = {0};
//
retLen = webSocket_buildRespondShakeKey(myKey, myKeyLen, tempKey);
//printf("webSocket_matchShakeKey :\r\n%d : %s\r\n%d : %s\r\n", acceptKeyLen, acceptKey, retLen, tempKey);
//
if(retLen != acceptKeyLen)
{
printf("webSocket_matchShakeKey : len err\r\n%s\r\n%s\r\n%s\r\n", myKey, tempKey, acceptKey);
return -1;
}
else if(strcmp((const char *)tempKey, (const char *)acceptKey) != 0)
{
printf("webSocket_matchShakeKey : str err\r\n%s\r\n%s\r\n", tempKey, acceptKey);
return -1;
}
return 0;
}
/*******************************************************************************
* 名称: webSocket_buildHttpHead
* 功能: 构建client端连接服务器时的http协议头, 注意websocket是GET形式的
* 形参: *ip：要连接的服务器ip字符串
* port : 服务器端口
* *interfacePath : 要连接的端口地址
* *shakeKey : 握手key, 可以由任意的16位字符串打包成base64后得到
* *package : 存储最后打包好的内容
* 返回: 无
* 说明: 无
******************************************************************************/
void webSocket_buildHttpHead(char *ip, int port, char *interfacePath, unsigned char *shakeKey, char *package)
{
const char httpDemo[] = "GET %s HTTP/1.1\r\n"
"Connection: Upgrade\r\n"
"Host: %s:%d\r\n"
"Sec-WebSocket-Key: %s\r\n"
"Sec-WebSocket-Version: 13\r\n"
"Sec-WebSocket-Protocol: tty\r\n"
"Upgrade: websocket\r\n\r\n";
sprintf(package, httpDemo, interfacePath, ip, port, shakeKey);
}
/*******************************************************************************
* 名称: webSocket_buildHttpRespond
* 功能: 构建server端回复client连接请求的http协议
* 形参: *acceptKey：来自client的握手key
* acceptKeyLen : 长度
* *package : 存储
* 返回: 无
* 说明: 无
******************************************************************************/
void webSocket_buildHttpRespond(unsigned char *acceptKey, unsigned int acceptKeyLen, char *package)
{
const char httpDemo[] = "HTTP/1.1 101 Switching Protocols\r\n"
"Upgrade: websocket\r\n"
"Server: Microsoft-HTTPAPI/2.0\r\n"
"Connection: Upgrade\r\n"
"Sec-WebSocket-Accept: %s\r\n"
"%s\r\n\r\n"; // 时间打包待续 // 格式如 "Date: Tue, 20 Jun 2017 08:50:41 CST\r\n"
time_t now;
struct tm *tm_now;
char timeStr[256] = {0};
unsigned char respondShakeKey[256] = {0};
// 构建回应的握手key
webSocket_buildRespondShakeKey(acceptKey, acceptKeyLen, respondShakeKey);
// 构建回应时间字符串
time(&now);
tm_now = localtime(&now);
strftime(timeStr, sizeof(timeStr), "Date: %a, %d %b %Y %T %Z", tm_now);
// 组成回复信息
sprintf(package, httpDemo, respondShakeKey, timeStr);
}
/*******************************************************************************
* 名称: webSocket_enPackage
* 功能: websocket数据收发阶段的数据打包, 通常client发server的数据都要isMask(掩码)处理, 反之server到client却不用
* 形参: *data：准备发出的数据
* dataLen : 长度
* *package : 打包后存储地址
* packageMaxLen : 存储地址可用长度
* isMask : 是否使用掩码 1要 0 不要
* type : 数据类型, 由打包后第一个字节决定, 这里默认是数据传输, 即0x81
* 返回: 打包后的长度(会比原数据长2~16个字节不等) <=0 打包失败
* 说明: 无
******************************************************************************/
int webSocket_enPackage(unsigned char *data, unsigned int dataLen, unsigned char *package, unsigned int packageMaxLen, bool isMask, Websocket_CommunicationType type)
{
unsigned char maskKey[4] = {0}; // 掩码
unsigned char temp1, temp2;
int count;
unsigned int i, len = 0;
if(packageMaxLen < 2)
return -1;
if(type == WCT_MINDATA)
*package++ = 0x00;
else if(type == WCT_TXTDATA)
*package++ = 0x81;
else if(type == WCT_BINDATA)
*package++ = 0x82;
else if(type == WCT_DISCONN)
*package++ = 0x88;
else if(type == WCT_PING)
*package++ = 0x89;
else if(type == WCT_PONG)
*package++ = 0x8A;
else
return -1;
//
if(isMask)
*package = 0x80;
len += 1;
//
if(dataLen < 126)
{
*package++ |= (dataLen&0x7F);
len += 1;
}
else if(dataLen < 65536)
{
if(packageMaxLen < 4)
return -1;
*package++ |= 0x7E;
*package++ = (char)((dataLen >> 8) & 0xFF);
*package++ = (unsigned char)((dataLen >> 0) & 0xFF);
len += 3;
}
else if(dataLen < 0xFFFFFFFF)
{
if(packageMaxLen < 10)
return -1;
*package++ |= 0x7F;
*package++ = 0; //(char)((dataLen >> 56) & 0xFF); // 数据长度变量是 unsigned int dataLen, 暂时没有那么多数据
*package++ = 0; //(char)((dataLen >> 48) & 0xFF);
*package++ = 0; //(char)((dataLen >> 40) & 0xFF);
*package++ = 0; //(char)((dataLen >> 32) & 0xFF);
*package++ = (char)((dataLen >> 24) & 0xFF); // 到这里就够传4GB数据了
*package++ = (char)((dataLen >> 16) & 0xFF);
*package++ = (char)((dataLen >> 8) & 0xFF);
*package++ = (char)((dataLen >> 0) & 0xFF);
len += 9;
}
//
if(isMask) // 数据使用掩码时, 使用异或解码, maskKey[4]依次和数据异或运算, 逻辑如下
{
if(packageMaxLen < len + dataLen + 4)
return -1;
webSocket_getRandomString(maskKey, sizeof(maskKey)); // 随机生成掩码
*package++ = maskKey[0];
*package++ = maskKey[1];
*package++ = maskKey[2];
*package++ = maskKey[3];
len += 4;
for(i = 0, count = 0; i < dataLen; i++)
{
temp1 = maskKey[count];
temp2 = data[i];
*package++ = (char)(((~temp1)&temp2) | (temp1&(~temp2))); // 异或运算后得到数据
count += 1;
if(count >= sizeof(maskKey)) // maskKey[4]循环使用
count = 0;
}
len += i;
*package = '\0';
}
else // 数据没使用掩码, 直接复制数据段
{
if(packageMaxLen < len + dataLen)
return -1;
memcpy(package, data, dataLen);
package[dataLen] = '\0';
len += dataLen;
}
//
return len;
}
/*******************************************************************************
* 名称: webSocket_dePackage
* 功能: websocket数据收发阶段的数据解包, 通常client发server的数据都要isMask(掩码)处理, 反之server到client却不用
* 形参: *data：解包的数据
* dataLen : 长度
* *package : 解包后存储地址
* packageMaxLen : 存储地址可用长度
* *packageLen : 解包所得长度
* 返回: 解包识别的数据类型 如 : txt数据, bin数据, ping, pong等
* 说明: 无
******************************************************************************/
int webSocket_dePackage(unsigned char *data, unsigned int dataLen, unsigned char *package, unsigned int packageMaxLen, unsigned int *packageLen)
{
unsigned char maskKey[4] = {0}; // 掩码
unsigned char temp1, temp2;
char Mask = 0, type;
int count, ret;
unsigned int i, len = 0, dataStart = 2;
if(dataLen < 2)
return -1;
type = data[0]&0x0F;
if((data[0]&0x80) == 0x80)
{
if(type == 0x01)
ret = WCT_TXTDATA;
else if(type == 0x02)
ret = WCT_BINDATA;
else if(type == 0x08)
ret = WCT_DISCONN;
else if(type == 0x09)
ret = WCT_PING;
else if(type == 0x0A)
ret = WCT_PONG;
else
return WCT_ERR;
}
else if(type == 0x00)
ret = WCT_MINDATA;
else
return WCT_ERR;
//
if((data[1] & 0x80) == 0x80)
{
Mask = 1;
count = 4;
}
else
{
Mask = 0;
count = 0;
}
//
len = data[1] & 0x7F;
//
if(len == 126)
{
if(dataLen < 4)
return WCT_ERR;
len = data[2];
len = (len << 8) + data[3];
if(dataLen < len + 4 + count)
return WCT_ERR;
if(Mask)
{
maskKey[0] = data[4];
maskKey[1] = data[5];
maskKey[2] = data[6];
maskKey[3] = data[7];
dataStart = 8;
}
else
dataStart = 4;
}
else if(len == 127)
{
if(dataLen < 10)
return WCT_ERR;
if(data[2] != 0 || data[3] != 0 || data[4] != 0 || data[5] != 0) // 使用8个字节存储长度时, 前4位必须为0, 装不下那么多数据...
return WCT_ERR;
len = data[6];
len = (len << 8) + data[7];
len = (len << 8) + data[8];
len = (len << 8) + data[9];
if(dataLen < len + 10 + count)
return WCT_ERR;
if(Mask)
{
maskKey[0] = data[10];
maskKey[1] = data[11];
maskKey[2] = data[12];
maskKey[3] = data[13];
dataStart = 14;
}
else
dataStart = 10;
}
else
{
if(dataLen < len + 2 + count)
return WCT_ERR;
if(Mask)
{
maskKey[0] = data[2];
maskKey[1] = data[3];
maskKey[2] = data[4];
maskKey[3] = data[5];
dataStart = 6;
}
else
dataStart = 2;
}
//
if(dataLen < len + dataStart)
return WCT_ERR;
//
if(packageMaxLen < len + 1)
return WCT_ERR;
//
if(Mask) // 解包数据使用掩码时, 使用异或解码, maskKey[4]依次和数据异或运算, 逻辑如下
{
//printf("depackage : len/%d\r\n", len);
for(i = 0, count = 0; i < len; i++)
{
temp1 = maskKey[count];
temp2 = data[i + dataStart];
*package++ = (char)(((~temp1)&temp2) | (temp1&(~temp2))); // 异或运算后得到数据
count += 1;
if(count >= sizeof(maskKey)) // maskKey[4]循环使用
count = 0;
//printf("%.2X|%.2X|%.2X, ", temp1, temp2, *(package-1));
}
*package = '\0';
}
else // 解包数据没使用掩码, 直接复制数据段
{
memcpy(package, &data[dataStart], len);
package[len] = '\0';
}
*packageLen = len;
//
return ret;
}
SSL_CTX* InitCTX(void)
{
const SSL_METHOD *method;
SSL_CTX *ctx;
OpenSSL_add_all_algorithms(); /* Load cryptos, et.al. */
SSL_load_error_strings(); /* Bring in and register error messages */
method = TLS_client_method(); /* Create new client-method instance */
ctx = SSL_CTX_new(method); /* Create new context */
if ( ctx == NULL )
{
ERR_print_errors_fp(stderr);
abort();
}
return ctx;
}
void ShowCerts(SSL* ssl)
{
X509 *cert;
char *line;
cert = SSL_get_peer_certificate(ssl); /* get the server's certificate */
if ( cert != NULL )
{
printf("Server certificates:\n");
line = X509_NAME_oneline(X509_get_subject_name(cert), 0, 0);
printf("Subject: %s\n", line);
free(line); /* free the malloc'ed string */
line = X509_NAME_oneline(X509_get_issuer_name(cert), 0, 0);
printf("Issuer: %s\n", line);
free(line); /* free the malloc'ed string */
X509_free(cert); /* free the malloc'ed certificate copy */
}
else
printf("Info: No client certificates configured.\n");
}
/* * Generates a NSS key log format compatible string containing the client
* random and the master key, intended to be used to decrypt externally
* captured network traffic using tools like Wireshark.
*
* Only supports the CLIENT_RANDOM method (SSL 3.0 - TLS 1.2).
*
* https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format
*/
char* ssl_ssl_masterkey_to_str(SSL *ssl)
{
char *str = NULL;
int rv;
unsigned char *k, *r;
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
unsigned char kbuf[48], rbuf[32];
k = &kbuf[0];
r = &rbuf[0];
SSL_SESSION_get_master_key(SSL_get0_session(ssl), k, sizeof(kbuf));
SSL_get_client_random(ssl, r, sizeof(rbuf));
#else /* OPENSSL_VERSION_NUMBER < 0x10100000L */
k = ssl->session->master_key;
r = ssl->s3->client_random;
#endif /* OPENSSL_VERSION_NUMBER < 0x10100000L */
rv = asprintf(&str,
"CLIENT_RANDOM "
"%02X%02X%02X%02X%02X%02X%02X%02X"
"%02X%02X%02X%02X%02X%02X%02X%02X"
"%02X%02X%02X%02X%02X%02X%02X%02X"
"%02X%02X%02X%02X%02X%02X%02X%02X"
" "
"%02X%02X%02X%02X%02X%02X%02X%02X"
"%02X%02X%02X%02X%02X%02X%02X%02X"
"%02X%02X%02X%02X%02X%02X%02X%02X"
"%02X%02X%02X%02X%02X%02X%02X%02X"
"%02X%02X%02X%02X%02X%02X%02X%02X"
"%02X%02X%02X%02X%02X%02X%02X%02X"
"\n",
r[ 0], r[ 1], r[ 2], r[ 3], r[ 4], r[ 5], r[ 6], r[ 7],
r[ 8], r[ 9], r[10], r[11], r[12], r[13], r[14], r[15],
r[16], r[17], r[18], r[19], r[20], r[21], r[22], r[23],
r[24], r[25], r[26], r[27], r[28], r[29], r[30], r[31],
k[ 0], k[ 1], k[ 2], k[ 3], k[ 4], k[ 5], k[ 6], k[ 7],
k[ 8], k[ 9], k[10], k[11], k[12], k[13], k[14], k[15],
k[16], k[17], k[18], k[19], k[20], k[21], k[22], k[23],
k[24], k[25], k[26], k[27], k[28], k[29], k[30], k[31],
k[32], k[33], k[34], k[35], k[36], k[37], k[38], k[39],
k[40], k[41], k[42], k[43], k[44], k[45], k[46], k[47]);
return (rv < 0) ? NULL : str;
}
int conn_write(struct tty_conn *conn, void*buffer, int len)
{
int ret;
if(conn->use_ssl){
ret = SSL_write(conn->ssl, buffer, len);
}else{
ret = write(conn->fd, buffer, len);
}
return ret;
}
int conn_read(struct tty_conn *conn, void*buffer, int len)
{
int ret;
if(conn->use_ssl){
ret = SSL_read(conn->ssl, buffer, len);
}else{
ret = read(conn->fd, buffer, len);
}
return ret;
}
/*******************************************************************************
* 名称: webSocket_clientLinkToServer
* 功能: 向websocket服务器发送http(携带握手key), 以和服务器构建连接, 非阻塞模式
* 形参: *ip：服务器ip
* port : 服务器端口
* *interface_path : 接口地址
* 返回: >0 返回连接句柄 <= 0 连接失败或超时, 所花费的时间 ms
* 说明: 无
******************************************************************************/
int webSocket_clientLinkToServer(struct tty_conn *conn, char *hostname, int port, char *interface_path)
{
struct hostent *host;
if ( (host = gethostbyname(hostname)) == NULL )
{
perror(hostname);
printf("hostname: %s, gethostbyname error\n", hostname);
goto err;
}
int ret, fd , timeOut;
unsigned char loginBuf[512] = {0}, recBuf[512] = {0}, shakeKey[128] = {0}, *p;
// zhd服务器端网络地址结构体
struct sockaddr_in report_addr;
memset(&report_addr,0,sizeof(report_addr)); // 数据初始化--清零
report_addr.sin_family = AF_INET; // 设置为IP通信
//report_addr.sin_addr.s_addr = inet_addr(ip); // 服务器IP地址
report_addr.sin_addr.s_addr = *(long*)(host->h_addr); // 服务器IP地址
report_addr.sin_port = htons(port); // 服务器端口号
//create unix socket
if((fd = socket(AF_INET,SOCK_STREAM, 0)) < 0)
{
printf("webSocket : socket create failed\r\n");
goto err;
}
//非阻塞
//ret = fcntl(fd , F_GETFL , 0);
//fcntl(fd , F_SETFL , ret | O_NONBLOCK);
// 禁用TCP nagle 算法
int enable = 1;
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (void*)&enable,sizeof(enable));
//connect
timeOut = 0;
if(connect(fd , (struct sockaddr *)&report_addr,sizeof(struct sockaddr)) != 0)
{
printf("connect to %s:%d Failed\n", hostname, port);
return -1;
}
conn->fd = fd;
if(conn->use_ssl){
SSL_CTX *ctx;
// SSL *ssl;
ctx = InitCTX();
conn->ssl = SSL_new(ctx); /* create new SSL connection state */
SSL_set_fd(conn->ssl, fd); /* attach the socket descriptor */
if ( SSL_connect(conn->ssl) == -1 ) /* perform the connection */
ERR_print_errors_fp(stderr);
/*
FILE *f = fopen("ssl_session.txt", "w");
SSL_SESSION *ss = SSL_get_session(ssl);
SSL_SESSION_print_fp(f, ss);
fclose(f);
// 导出 ssl master-key 用于wireshark解密 ssl 抓包
FILE *f1 = fopen("ssl_log.txt", "w");
char *log = ssl_ssl_masterkey_to_str(ssl);
fwrite(log, sizeof(char), strlen(log), f1);
fclose(f1);
*/
}
//发送http协议头
memset(shakeKey, 0, sizeof(shakeKey));
webSocket_buildShakeKey(shakeKey); // 创建握手key
memset(loginBuf, 0, sizeof(loginBuf)); // 创建协议包
webSocket_buildHttpHead(hostname, port, interface_path, shakeKey, (char *)loginBuf);