AES 加密解密API

linux下AES-CBC128的加密程序测试源码  

http://idsips.blog.163.com/blog/static/480012722012398048394/

AES加密和解密——使用openssl编程

http://www.lovelucy.info/openssl-aes-encryption.html

AES_cbc_encrypt

 

http://blog.sina.com.cn/s/blog_608a9fa70100dk6x.html

AES_cbc_encrypt and Perl Crypt::CBC Incompatibility

hex2bin bin2hex

http://www.opensubscriber.com/message/[e-mail]/10974596.html

openssl  1.0.1

http://fossies.org/dox/openssl-1.0.1c/aes__misc_8c_source.html

AES  加密解密实例

http://blog.chinaunix.net/uid-26553782-id-3087173.html

 

#include<stdio.h>#include <string.h>#include "stdafx.h"#include <openssl/aes.h>#define INTERFACE"eth0" #define PAD_SIZE 32/* *需要密钥key[16+1]，向量iv1[16+1]，明文pt1[]*/void hextoasii(unsignedchar *bytes,int byteNum,char *strAsii);//----------------------------------------------------------int aes_test(void){         unsigned char key[]= ")*^&$*kdjfkdjfjdsjfska!*&^%$#@";// 128bits key (应该是真正的随机数才好)    char pt1[]= "aaaaaaaaaaaaaaaaab";// 明文, 16位的时候 成功。    pt1[5] = 0x0;        char ct[1000]= {0};// 密文    char pt2[1000]={0};// 解密后的明文    AES_KEY k;         int ilen=sizeof(pt1);    int ctLen =(ilen%16==0)?ilen:(ilen/16+1)*16;    //|bc~!f947j*$m_op    unsigned char iv1[16+1]= {"|bc~!f947j*$m_op"};// 16+1，加密用     unsigned char iv2[16+1]= {"|bc~!f947j*$m_op"};// 16+1，解密用            int i,j;    AES_set_encrypt_key(key, 16*16,&k);  /* void AES_cbc_encrypt( const unsigned char *in,  unsigned char *out, const unsigned long length, //in 的长度 const AES_KEY *key, //it will be changed during the encrypt&decrypt process, so it required to be reset each time unsigned char *ivec, //向量 const int enc);  */     AES_cbc_encrypt((unsignedchar*)pt1,(unsigned char*)ct, ilen,&k, (unsigned char*)iv1, AES_ENCRYPT);      printf("encrypt:%s\n", ct);     FILE *fp1= fopen("aes_encrypt.txt","w");     fwrite(ct,sizeof(unsignedchar),ctLen, fp1);     fflush(fp1);       char strAsii[1000]={0};     hextoasii((unsignedchar*)ct, ctLen, strAsii);     printf("\n%s\n", strAsii);  //memset(pt2, 0, 33);      AES_set_decrypt_key(key, 16*16,&k);     AES_cbc_encrypt((unsignedchar*)ct,(unsigned char*)pt2, ctLen,&k, (unsigned char*)iv2, AES_DECRYPT);      printf("before: %s\n", pt1);     printf("after : %s\n", pt2);     if (memcmp(pt1, pt2, ilen)==0)         puts("AES CBC mode ok");     else puts("AES CBC mode err");        return 0;}//-----------------------------------------------------------char* AESDecrypt(       char* strEncryptDes,      const char* strUnEncryptSrc      ){     unsigned char cipher[10000]= {0};// 密文     unsigned char iv1[16+1]= {"|bc~!f947j*$m_op"};// 16+1，向量      unsigned char strEncryptKey[]= ")*^&$*kdjfkdjfjdsjfska!*&^%$#@";// 128bits key (应该是真正的随机数才好)     AES_KEY k;     int ilen=strlen(strUnEncryptSrc);     int ctLen = ilen/2;     int i=0, nCipherHex=0;     char strAsii[5];     for(i=0; i<ctLen; i++)     {         memset(strAsii, 0, 5);         memcpy(strAsii, strUnEncryptSrc, 2);         sscanf(strAsii,"%X",&nCipherHex);         cipher[i]= nCipherHex;         strUnEncryptSrc += 2;     }     AES_set_decrypt_key(strEncryptKey, 16*16,&k);     AES_cbc_encrypt((unsignedchar*)cipher,(unsigned char*)  strEncryptDes, ctLen,&k, (unsigned char*)iv1, AES_DECRYPT); //hextoasii(cipher, ctLen, strEncryptDes); return strEncryptDes;}//-----------------------------------------------------------char* AESEncrypt( unsigned char* strUnEncryptSrc,unsigned char* strEncryptDes,int ilen){     //string strEncryptDes;      unsignedchar cipher[10000]= {0};// 密文      unsignedchar iv1[16+1]= {"|bc~!f947j*$m_op"};// 16+1，向量       unsignedchar strEncryptKey[]= ")*^&$*kdjfkdjfjdsjfska!*&^%$#@";// 128bits key (应该是真正的随机数才好)      AES_KEY k;      int i=0;      char strAsii[5];       //int ilen=strUnEncryptSrc.length();       int ctLen= (ilen%16==0)?ilen:(ilen/16+1)*16;        AES_set_encrypt_key((unsignedchar*)strEncryptKey, 16*16,&k);  /* void AES_cbc_encrypt( const unsigned char *in, //明文 unsigned char *out, //密文 const unsigned long length, //in 的长度 const AES_KEY *key, //it will be changed during the encrypt&decrypt process, so it required to be reset each time unsigned char *ivec, //向量 const int enc);  */      AES_cbc_encrypt(strUnEncryptSrc,(unsigned char*)cipher, ilen,&k, (unsigned char*)iv1, AES_ENCRYPT);        for(i=0; i<ctLen; i++)      {            memset(strAsii, 0, 5);            sprintf(strAsii,"%02X", cipher[i]);            memcpy(&strEncryptDes[i*2], strAsii, 2);      }           //hextoasii(cipher, ctLen, strEncryptDes);      return(char*)strEncryptDes;}//-----------------------------------------------------------void aes_hex(void){      char str[]= "hello world\n";      char strAes[10000]= {0};      char strUnAes[10000]={0};      AESEncrypt ((unsignedchar*)str,(unsigned char*)strAes,sizeof(str));      AESDecrypt (strUnAes,strAes);      printf("\n");      printf(str);      printf(strUnAes);}//----------------------------------------------------------void hextoasii(unsignedchar *bytes,int byteNum,char *strAsii){    int i=0;    for(i=0; i<byteNum; i++)    {        sprintf(strAsii,"%02X", bytes[i]);        strAsii += 2;    }    *strAsii ='\n';} AES_cbc_encrypt源码http://bbs.chinaunix.net/thread-948004-1-1.htmlvoid AES_cbc_encrypt(const unsigned char *in, unsigned char *out,                     const unsigned long length, const AES_KEY *key,                     unsigned char *ivec, const int enc) {        unsigned long n;        unsigned long len = length;        unsigned char tmp[AES_BLOCK_SIZE];        const unsigned char *iv = ivec;        assert(in && out && key && ivec);        assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));        if (AES_ENCRYPT == enc) {                while (len >= AES_BLOCK_SIZE) {                        for(n=0; n < AES_BLOCK_SIZE; ++n)                                out[n] = in[n] ^ iv[n];                        AES_encrypt(out, out, key);                        iv = out;                        len -= AES_BLOCK_SIZE;                        in += AES_BLOCK_SIZE;                        out += AES_BLOCK_SIZE;                }                if (len) {                        for(n=0; n < len; ++n)                                out[n] = in[n] ^ iv[n];                        for(n=len; n < AES_BLOCK_SIZE; ++n)                                out[n] = iv[n];                        AES_encrypt(out, out, key);                        iv = out;                }                memcpy(ivec,iv,AES_BLOCK_SIZE);        } else if (in != out) {                while (len >= AES_BLOCK_SIZE) {                        AES_decrypt(in, out, key);                        for(n=0; n < AES_BLOCK_SIZE; ++n)                                out[n] ^= iv[n];                        iv = in;                        len -= AES_BLOCK_SIZE;                        in  += AES_BLOCK_SIZE;                        out += AES_BLOCK_SIZE;                }                if (len) {                        AES_decrypt(in,tmp,key);                        for(n=0; n < len; ++n)                                out[n] = tmp[n] ^ iv[n];                        iv = in;                }                memcpy(ivec,iv,AES_BLOCK_SIZE);        } else {                while (len >= AES_BLOCK_SIZE) {                        memcpy(tmp, in, AES_BLOCK_SIZE);                        AES_decrypt(in, out, key);                        for(n=0; n < AES_BLOCK_SIZE; ++n)                                out[n] ^= ivec[n];                        memcpy(ivec, tmp, AES_BLOCK_SIZE);                        len -= AES_BLOCK_SIZE;                        in += AES_BLOCK_SIZE;                        out += AES_BLOCK_SIZE;                }                if (len) {                        memcpy(tmp, in, AES_BLOCK_SIZE);                        AES_decrypt(tmp, out, key);                        for(n=0; n < len; ++n)                                out[n] ^= ivec[n];                        for(n=len; n < AES_BLOCK_SIZE; ++n)                                out[n] = tmp[n];                        memcpy(ivec, tmp, AES_BLOCK_SIZE);                }        }}