发送DES-base64编码的HTTP Post请求，并base64-DES解码返回消息

#include <stdio.h>  #include <string.h>  #include <string>#include <iostream>#include <sys/socket.h>  #include <arpa/inet.h>  #include <unistd.h>  #include <netinet/in.h>  #include <stdlib.h>  #include <assert.h>#include <openssl/objects.h>#include <openssl/evp.h> #define MAXLINE 1024const char base[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; int post(char *ip,int port,char *page,char *type,char *msg,char *result){    int sockfd,n;      char recvline[MAXLINE];      struct sockaddr_in servaddr;  char content[4096];char content_page[50];sprintf(content_page,"POST %s HTTP/1.1\r\n",page);char content_host[50];sprintf(content_host,"HOST: %s:%d\r\n",ip,port);char content_type[50];sprintf(content_type,"Content-Type: %s\r\n",type);char content_len[50];sprintf(content_len,"Content-Length: %d\r\n\r\n",strlen(msg));sprintf(content,"%s%s%s%s%s",content_page,content_host,content_type,content_len,msg);    if((sockfd = socket(AF_INET,SOCK_STREAM,0)) < 0)          printf("socket error\n");      bzero(&servaddr,sizeof(servaddr));      servaddr.sin_family = AF_INET;      servaddr.sin_port = htons(80);      if(inet_pton(AF_INET,ip,&servaddr.sin_addr) <= 0)          printf("inet_pton error\n");      if(connect(sockfd,(struct sockaddr *)&servaddr,sizeof(servaddr)) < 0)          printf("connect error\n");      write(sockfd,content,strlen(content));  //printf("%s\n",content);    while((n = read(sockfd,recvline,MAXLINE)) > 0)      {          recvline[n] = 0;  strcat(result,recvline);if(strstr(recvline,"\n0\r\n")!=NULL){break;}}  if(n < 0)  printf("read error\n");  }std::string desEncrypt(const std::string& source, const std::string& key){EVP_CIPHER_CTX ctx;    EVP_CIPHER_CTX_init(&ctx);    int ret = EVP_EncryptInit_ex(&ctx, EVP_des_ecb(), NULL, (const unsigned char*)key.data(), NULL);    assert(ret == 1);    unsigned char* result = new unsigned char[source.length() + 64]; // 弄个足够大的空间    int len1 = 0;    ret = EVP_EncryptUpdate(&ctx, result, &len1, (const unsigned char*)source.data(), source.length());    assert(ret == 1);    int len2 = 0;    ret = EVP_EncryptFinal_ex(&ctx, result+len1, &len2);     assert(ret == 1);    ret = EVP_CIPHER_CTX_cleanup(&ctx);    assert(ret == 1);    std::string res((char*)result, len1+len2);    delete[] result;    return res;}std::string desDecrypt(const std::string& ciphertext, const std::string& key){    EVP_CIPHER_CTX ctx;    EVP_CIPHER_CTX_init(&ctx);    int ret = EVP_DecryptInit_ex(&ctx, EVP_des_ecb(), NULL, (const unsigned char*)key.data(), NULL);    assert(ret == 1);    unsigned char* result = new unsigned char[ciphertext.length() + 64]; // 弄个足够大的空间    int len1 = 0;    ret = EVP_DecryptUpdate(&ctx, result, &len1, (const unsigned char*)ciphertext.data(), ciphertext.length());    assert(ret == 1);    int len2 = 0;    ret = EVP_DecryptFinal_ex(&ctx, result+len1, &len2);     assert(ret == 1);    ret = EVP_CIPHER_CTX_cleanup(&ctx);    assert(ret == 1);    std::string res((char*)result, len1+len2);    delete[] result;    return res;}char *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++] = base[(int)current];        current = ( (unsigned char)(bindata[i] << 4 ) ) & ( (unsigned char)0x30 ) ;        if ( i + 1 >= binlength )        {            base64[j++] = base[(int)current];            base64[j++] = '=';            base64[j++] = '=';            break;        }        current |= ( (unsigned char)(bindata[i+1] >> 4) ) & ( (unsigned char) 0x0F );        base64[j++] = base[(int)current];        current = ( (unsigned char)(bindata[i+1] << 2) ) & ( (unsigned char)0x3C ) ;        if ( i + 2 >= binlength )        {            base64[j++] = base[(int)current];            base64[j++] = '=';            break;        }        current |= ( (unsigned char)(bindata[i+2] >> 6) ) & ( (unsigned char) 0x03 );        base64[j++] = base[(int)current];        current = ( (unsigned char)bindata[i+2] ) & ( (unsigned char)0x3F ) ;        base64[j++] = base[(int)current];    }    base64[j] = '\0';    return base64;}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 ( base[k] == base64[i] )                temp[0]= k;        }        for ( k = 0 ; k < 64 ; k ++ )        {            if ( base[k] == base64[i+1] )                temp[1]= k;        }        for ( k = 0 ; k < 64 ; k ++ )        {            if ( base[k] == base64[i+2] )                temp[2]= k;        }        for ( k = 0 ; k < 64 ; k ++ )        {            if ( base[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;}int demo(char* name, char* id, char* appid, char* key, char photo[]){char msg[1024];sprintf(msg,"{\"appid\": \"%s\",\"service\":\"wpho\",\"name\": \"%s\",\"cardno\": \"%s\"}",appid,name,id);int len = strlen(msg);std::string enc = desEncrypt(msg, key);unsigned char *msg_des = (unsigned char*)enc.data();char msg_base64[4096];len = enc.length();base64_encode((unsigned char*)msg_des,msg_base64,len);char ip[] = "192.168.0.1;int port = 80;char type[] = "application/json";char page[100];sprintf(page,"/demo.do");char result[1024*1000];post(ip,port,page,type,msg_base64,result);char *h_proto = strtok(result,"\n");char *h_server = strtok(NULL,"\n");char *h_data = strtok(NULL,"\n");char *h_ctype = strtok(NULL,"\n");char *h_encoding = strtok(NULL,"\n");char *h_connection = strtok(NULL,"\n");char *h_pragma = strtok(NULL,"\n");char *h_expires = strtok(NULL,"\n");char *h_cache = strtok(NULL,"\n");char *body_length = strtok(NULL,"\r\n");char *body = strtok(NULL,"\n");body[strlen(body)-1]='\0';unsigned char back_base64[1024*100];int bytes = base64_decode(body, back_base64); std::string source((char*)back_base64, bytes); // 二进制数据std::string dec = desDecrypt(source, key);printf("%s",dec.c_str());return 0;};