JS和利用openssl的object C加密得到相同的aes加密密文

　　这是之前接到的一个工作内容，项目原本的登录操作是获得账号和密码以后，对密码进行一遍MD5加密，然后传递账号和密文到cgi文件。在c中获取到账户以后，从数据库中获取到密码，对密码进行一次MD5的加密，然后将该密文与post过来的密文进行对比，进行登录验证。也就是说，虽然进行了一次密码加密，但是在get/post的过程中，该密文是可见的，不符合客户的保密需求。

　　经过协商以后决定，在传递的过程中不再对密码进行传输，而是将账号与session进行组合，组合成一个新的字符串以后，将密码当做密钥，进行一次AES的加密操作，以及一次MD5的加密操作生成用来POST的密文。而C中，获取到账号和密文以后，将账号和session组合，然后利用c中openssl的接口进行AES加密，MD5加密的操作获取新的密文，然后将该密文和传送得到的密文进行对比，进行登录验证。如此一来，密码的作用就仅仅是两边进行加密操作的密钥，而传送的验证字符串，更是进行了两次加密操作，大大提高了保密性。

　　在工作的过程中，遇到的最大难题到并非是加密的操作，而是JS中AES加密的密文和Object C中利用openSSL的AES加密的密文总是无法相同，而直到最后也没有解决JS和openssl的结果不同的问题，幸运的是，在工作的过程中，意外发现直接利用linux的aes加密命令却能获得和JS相同的密文（echo -n "secretsecretsecret" | openssl enc -e -a -aes-256-cbc -K 12345678 -iv 12345678）。于是，在CGI中添加了调用linux命令将结果写到文件中，然后读取文件的方式实现了这个操作。如果有人解决了这个问题，希望能够联系我，也可以发送邮件，我的邮箱地址是：blithegu9123@gmail.com

　　首先是JS的，在JS的aes加密过程中，用了好几个不同的CryptoJs的库，虽然也是可以的到加密解密的实现，但是得到结果并不符合我的需要，直到使用Mark Percival 写的脚本：放上地址（https://github.com/mdp/gibberish-aes），放上代码：

     printf("<script type=\"text/javascript\" src=\"/bh/pjs/crypto-js-3.1.6/gibberish-aes.js\"></script>\n");
     printf("<script type=\"text/javascript\" src=\"/bh/pjs/crypto-js-3.1.6/jquery.md5.js\"></script>\n");

     printf("//--------------------------------aes MD5 加密-------------------------------------------------------------------------------\n");
     printf("    var plaintText = document.frm.UserName.value + session_tmp;\n");
     printf("    var keyStr = document.frm.UserPwd.value;\n");
     printf("    var addZero;\n");
     /* 利用网上流传比较多的CryptoJS的aes加密，解密
     * printf("    var key = CryptoJS.enc.Utf8.parse(keyStr);\n");
     * printf("    plaintText = '00112233445566778899aabbccddeeff';\n");

     * printf("    var encryptedData = CryptoJS.AES.encrypt(plaintText, key, {\n");
     * printf("        mode: CryptoJS.mode.ECB,\n");
     * printf("        padding: CryptoJS.pad.Pkcs7\n");
     * printf("        padding: CryptoJS.pad.NoPadding\n");
     * printf("    });\n");
     * printf("    var encryptedBase64Str = encryptedData.toString();\n");
     * printf("    var encryptedStr = encryptedData.ciphertext.toString();\n");
     * //解密
     * printf("    var encryptedHexStr = CryptoJS.enc.Hex.parse(encryptedStr);\n");
     * printf("    var encryptedBase64Str = CryptoJS.enc.Base64.stringify(encryptedHexStr);\n");
     * //printf("    var decryptedStr = CryptoJS.AES.decrypt(CryptoJS.lib.CipherParams.create({ ciphertext: CryptoJS.enc.Hex.parse(encryptedStr) }), key, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 }).toString();");
     * printf("    var decryptedData = CryptoJS.AES.decrypt(encryptedBase64Str, key, { \n");
     * printf("        mode: CryptoJS.mode.ECB,\n");
     * printf("        padding: CryptoJS.pad.Pkcs7\n");
     * printf("    });\n");
     * printf("    var decryptedStr = decryptedData.toString(CryptoJS.enc.Utf8); \n");
     * printf("    console.log(\"jiemi:\"+decryptedStr); \n");
     */

     printf("\n    /*AES加密前，将密钥转为16进制，将向量为sessio，再手动补位*/\n");
     printf("    var keyStr16 = stringToHex(keyStr);\n");
     printf("    var keyStr_iv = session_tmp;\n");
     printf("    console.log(\"plaint:\"+plaintText+\", len1:\"+plaintText.length+\", len2:\"+addZero+\", keyStr:\"+keyStr);\n");
     printf("    for(addZero = 64 - keyStr16.length;addZero > 0;addZero--){\n");
     printf("        keyStr16 = keyStr16 + \"0\";\n");
     printf("    };\n");
     printf("    for(addZero = 32 - keyStr_iv.length;addZero > 0;addZero--){\n");
     printf("        keyStr_iv = keyStr_iv + \"0\";\n");
     printf("    };\n");
     printf("    console.log(\"plaintText\"+plaintText+\"keyStr:\"+keyStr16+\"keyStr_iv:\"+keyStr_iv);\n");

     printf("\n    /*AES加密，Gibberrish私有库*/\n");
     printf("    GibberishAES.size(256);\n");
     printf("    var password = GibberishAES.h2a(keyStr16);\n");
     printf("    var iv = GibberishAES.h2a(keyStr_iv);\n");
     printf("    var plaintext = GibberishAES.s2a(plaintText);\n");
     printf("    var plaintext_enc = GibberishAES.rawEncrypt(plaintext, password, iv);\n");
     printf("    var plaintext_str64 = GibberishAES.Base64.encode(plaintext_enc);\n");
     printf("    console.log(\"plaintext_str64 is :\"+plaintext_str64);\n");

     printf("\n    /*密文转为Base64格式*/\n");
     printf("    plaintext_str64_str = plaintext_str64.toString();\n");
     printf("    plaintext_str64_str = plaintext_str64_str.substr(0,plaintext_str64_str.length-1);\n");

     printf("\n    /*MD5 加密*/\n");
     printf("    plaintText = $.md5(plaintext_str64_str);\n");
     printf("    console.log(\"MD5_Str:\"+plaintText);\n");
     printf("    if(document.frm.UserPwd.value!=\"\"){document.frm.UserPwd.value = plaintText;}\n");

　　插入Object C的代码，在Object C中，我利用openssl实现了AES的ebc和cbc两种方式的加密，但是可能是openssl的加密函数与命令实现时进行的补位操作不同，导致的到的密文也是不相同的：

 #include <openssl/aes.h>
 #include <openssl/md5.h>
     //---------------------------------- aes 加密 -------------------------

     /* 利用openssl接口带有的AES函数进行的ecb加密解密
     * char key[16],*text=NULL,temp_plaint[256],temp_session[256];
     * //memset(text,0,sizeof(text));
     * memset(temp_session,0,sizeof(temp_session));
     * memset(temp_plaint,0,sizeof(temp_plaint));
     * memset(key,0,16);
     * if(strlen(password)<16){
     *     int fixZero = 16-strlen(password);
     *     char *fix = "0";
     *     for(i =0; i<fixZero;i++){
     *         strcat(password,fix);
     *     }
     * }
     * memcpy(key,password,strlen(password));

     * //user = "admin6291494661564876577";
     * //strcpy(text,user);
     * //text = user;
     * //sprintf(temp_session,"%llu",session);
     * //strcat(text,temp_session);
     * text = "super";

     * AES_KEY aes_key;
     * AES_set_encrypt_key((unsigned char *)key, 128, &aes_key);

     * int text_len = strlen(text);
     * int blk_num = (text_len / AES_BLOCK_SIZE) + 1;
     * int alg_len = blk_num * AES_BLOCK_SIZE;

     * //uint8_t *alg_s = (typeof(alg_s)) malloc(alg_len);
     * unsigned char *alg_s = malloc(alg_len);
     * memcpy(alg_s, text, text_len);
     * int pad = AES_BLOCK_SIZE - text_len % AES_BLOCK_SIZE;

     * for (i = text_len; i < alg_len; i++) {
     *     alg_s[i] = pad;
     * }

     * int enc_len = alg_len;

     * unsigned char *enc_s = malloc(enc_len);
     * memset(enc_s, 0, enc_len);
     * for (i = 0; i < blk_num; i++) {
     *     //AES_ecb_encrypt(OFFOF(alg_s, i * AES_BLOCK_SIZE), OFFOF(enc_s, i * AES_BLOCK_SIZE), &aes_key, AES_ENCRYPT);
     *     AES_ecb_encrypt(alg_s + i * AES_BLOCK_SIZE, enc_s + i * AES_BLOCK_SIZE, &aes_key, AES_ENCRYPT);
     *     trace("%02x ,%d\n",enc_s[i],i);
     * }

     * int t =0;
     * for (i = 0; i < enc_len; i++) {
     *     if(t)    t += sprintf(temp_plaint + t,"%02x", enc_s[i]);
     *     else    t = sprintf(temp_plaint,"%02x", enc_s[i]);
     * }

     * //解密
     * AES_set_decrypt_key(key, 128, &aes_key);
     * int dec_len = enc_len;
     * uint8_t *dec_s = (typeof(dec_s)) malloc(dec_len);
     * for (i = 0; i < blk_num; i++) {
     *     AES_ecb_encrypt(OFFOF(enc_s, i * AES_BLOCK_SIZE), OFFOF(dec_s, i * AES_BLOCK_SIZE), &aes_key, AES_DECRYPT);
     * }
     */

     /* 利用openssl接口带有的AES函数进行的cbc加密解密
     * unsigned char pt[64] = "secretsecretsecret";
     * unsigned char kt[64] = "1234567800000000000000000000000000000000000000000000000000000000";
     * unsigned char it[33] = "12345678000000000000000000000000";
     * // char pt[64] = "secretsecretsecret";
     * //char kt[65] = "1234567800000000000000000000000000000000000000000000000000000000";
     * //char it[33] = "12345678000000000000000000000000";
     * // char kt[64] = "12345678";
     * // char it[32] = "12345678";

     * unsigned char plainText[AES_BLOCK_SIZE * 4];
     * unsigned char cipherText[AES_BLOCK_SIZE * 4];
     * unsigned char keyText[AES_BLOCK_SIZE*4];
     * unsigned char ivText[AES_BLOCK_SIZE*2];
     * unsigned char ivdecText[AES_BLOCK_SIZE*2];
     * AES_KEY aes_key;
     * char plainText[AES_BLOCK_SIZE * 4];
     * char cipherText[AES_BLOCK_SIZE * 4];
     * char keyText[AES_BLOCK_SIZE * 4];
     * char ivText[AES_BLOCK_SIZE * 2];
     * char ivdecText[AES_BLOCK_SIZE * 2];

     * memset(plainText,0,sizeof(plainText));
     * memset(cipherText,0,sizeof(cipherText));
     * memset(keyText,0,sizeof(keyText));
     * memset(ivText,0,sizeof(ivText));
     * memset(ivdecText,0,sizeof(ivdecText));

     * memcpy(plainText,pt,strlen(pt));
     * memcpy(keyText,kt,strlen(kt));
     * memcpy(ivText,it,strlen(it));
     * memcpy(ivdecText,it,strlen(it));

     * // strcpy(plainText,pt);
     * // strcpy(keyText,kt);
     * // strcpy(ivText,it);
     * //strcpy(ivdecText,ivText);
     * // strcpy(ivdecText,it);

     * // strncpy(plainText,pt,strlen(pt));
     * // strncpy(keyText,kt,strlen(kt));
     * // strncpy(ivText,it,strlen(it));
     * // strncpy(ivdecText,it,strlen(it));

     * for(i = 0;i < sizeof(plainText);++i){
     *     if(plainText[i] == 0)    break;
     * }
     * AES_set_encrypt_key((unsigned char*)keyText,256,&aes_key);
     * AES_cbc_encrypt((unsigned char *)plainText,(unsigned char *)cipherText,sizeof(plainText),&aes_key,(unsigned char *)ivText,AES_ENCRYPT);

     * char temw[256];
     * for(i = 0;i < sizeof(cipherText);++i){
     *     if(cipherText[i] == 0)    break;
     *     sprintf(&temw[i],"%02x",cipherText[i]&0xff);
     * }
     * char plainba64[256];
     * memset(plainba64,0,strlen(plainba64));
     * int t_len;
     * base64_encode((unsigned char *)temw,(unsigned char *)plainba64,strlen(temw),&t_len);
     * AES_set_decrypt_key((unsigned char *)keyText,256,&aes_key);
     * AES_cbc_encrypt((unsigned char *)cipherText,(unsigned char *)plainText,sizeof(cipherText),&aes_key,(unsigned char *)ivdecText,AES_DECRYPT);
     * for(i = 0;i < sizeof(plainText);++i){
     *     if(plainText[i] == 0)    break;
     * }
     */

     /*将session，明文， key，iv合成字符串*/
     int t = ,cmd = ,wlen = ;
     char buff_CBC[],buff_CBC_cmd[],userText[],keyText[],temp_session[],file[],buff_ret[],*cbcText_f;
     FILE *fp = NULL;
     SlasRes sr;

     memset(keyText,,sizeof(keyText));
     memset(buff_ret,,sizeof(buff_ret));
     memset(temp_session,,sizeof(temp_session));

     /*session*/
     sprintf(temp_session,"%llu",session);
     strcpy(buff_CBC,temp_session);
     strcat(buff_CBC,",");

     /*mingwen*/
     strcpy(userText,user);
     strcat(userText,temp_session);
     strcat(buff_CBC,userText);
     strcat(buff_CBC,",");

     /*key,转换成16进制*/
     for(i = ;i<strlen(password);i++){
         if(password[i] == )    break;
         if(t)    t += sprintf(keyText+t,"%02x",password[i]);
         else    t = sprintf(keyText,"%02x",password[i]);
     }
     strcat(buff_CBC,keyText);
     strcat(buff_CBC,",");

     /*iv*/
     strcat(buff_CBC,temp_session);
     //trace("\nbuff_CBC:%s\n",buff_CBC);

     cmd = CMD_PASS_CBC_ENC;
     memcpy(buff_CBC_cmd, &cmd, sizeof(int));
     memcpy(buff_CBC_cmd+sizeof(int),buff_CBC,strlen(buff_CBC));
     wlen = strlen(buff_CBC)+;
     ret = CGIServerData((char *)buff_CBC_cmd,(int *)&wlen,&sr);
     if(ret !=  || sr.error || sr.state){
         printf("error");
         goto _END_;
     }

     strcpy(file,"/var/tmp/sess/sess_");
     strcat(file,temp_session);

     fp = fopen(file, "r");
     if(NULL == fp){
         printf("error");
         unlink(file);
         goto _END_;
     }

     fread(buff_ret,,,fp);
     cbcText_f = memmem(buff_ret,,"ffff",);
 /*    if(cbcText == NULL){
         printf("error");
         goto _END_;
     }
 */

     //-------------------------------- MD5 加密---------------------------------

     char *data;
     unsigned char md[];
     memset(md,,sizeof(md));
     char tmp[]={'\0'},buf[]={'\0'};

     data = cbcText_f+;
     data[strlen(data)-] = '\0';

     //trace("date:%s,%d",data,strlen(data));
     MD5_CTX ctx;
     MD5_Init(&ctx);
     MD5_Update(&ctx,data,strlen(data));
     MD5_Final(md,&ctx);

     for (i = ; i < ; i++){
         sprintf(tmp,"%02x",md[i]&0xff);
         strcat(buf,tmp);
     }