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 1024 const 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; };