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encryption.c
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encryption.c
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <openssl/rsa.h>
#include <openssl/sha.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
/**
* 功能描述:3DES加密
* @param pData：原始数据
* @param ilen: 原始数据长度
* @param ppDecryptData: 加密后数据
* @return -1: 失败, 其他: 加密数据长度
**/
int TripleDESEncrypt(const char* pData, int ilen, char** ppEncodeData)
{
/*密钥*/
unsigned char key[24] = {43,14,54,109,109,8,84,87,116,30,19,68,35,51,83,72,16,2,83,48,117,85,9,80};
/*初始化向量*/
unsigned char iv[8] = {111,121,47,42,75,34,33,124};
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
int rc = EVP_EncryptInit_ex(&ctx,EVP_des_ede3_cbc(),NULL,key,iv);
if (rc != 1)
{
EVP_CIPHER_CTX_cleanup(&ctx);
return -1;
}
/*对齐方式*/
int datalen = (ilen%8) == 0 ? (ilen + 8) : ((8 - ilen%8) + ilen);
*ppEncodeData = (char*)malloc(datalen);
memset(*ppEncodeData, 0, datalen);
int outlen = 0;
rc = EVP_EncryptUpdate(&ctx, (unsigned char*)(*ppEncodeData), &outlen, (unsigned char*)pData, ilen);
if(rc != 1)
{
EVP_CIPHER_CTX_cleanup(&ctx);
free(*ppEncodeData);
return -1;
}
int outlentmp = 0;
rc = EVP_EncryptFinal_ex(&ctx, (unsigned char*)(*ppEncodeData) + outlen,&outlentmp);
if(rc != 1)
{
EVP_CIPHER_CTX_cleanup(&ctx);
free(*ppEncodeData);
return -1;
}
outlen += outlentmp;
EVP_CIPHER_CTX_cleanup(&ctx);
return outlen;
}
/**
* 功能描述:3DES解密
* @param pData：原始数据
* @param ilen: 原始数据长度
* @param ppDecryptData: 解密后数据
* @return -1: 失败, 其他: 解密数据长度
**/
int TripleDESDecrypt(const char* pData, int ilen, char** ppDecryptData)
{
/*密钥*/
unsigned char key[24] = {43,14,54,109,109,8,84,87,116,30,19,68,35,51,83,72,16,2,83,48,117,85,9,80};
/*初始化向量*/
unsigned char iv[8] = {111,121,47,42,75,34,33,124};
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
int rc = EVP_EncryptInit_ex(&ctx,EVP_des_ede3_cbc(),NULL,key,iv);
if (rc != 1)
{
EVP_CIPHER_CTX_cleanup(&ctx);
return -1;
}
int outlen = ilen + 1;
*ppDecryptData = (char*)malloc(outlen);
memset(*ppDecryptData, 0 , outlen);
rc = EVP_DecryptUpdate(&ctx, (unsigned char*)(*ppDecryptData), &outlen, (unsigned char*)pData, ilen);
if(rc != 1)
{
EVP_CIPHER_CTX_cleanup(&ctx);
free(*ppDecryptData);
return -1;
}
int outlentmp = 0;
rc = EVP_DecryptFinal_ex(&ctx, (unsigned char*)(*ppDecryptData) + outlen,&outlentmp);
if(rc != 1)
{
EVP_CIPHER_CTX_cleanup(&ctx);
free(*ppDecryptData);
return -1;
}
outlen += outlentmp;
EVP_CIPHER_CTX_cleanup(&ctx);
return outlen;
}
/**
* 功能描述:RSA加密
* @param pData：原始数据
* @param ilen: 原始数据长度
* @param pEncodeData: 加密后数据
* @return -1: 失败, 其他: 加密数据长度
**/
int RSAEncrypt(const char* pData , int iLen, char** pEncodeData)
{
char chPublicKey[] = "-----BEGIN PUBLIC KEY-----\n"
"MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCb/vAGucNg3OJyBV6/aWEd7IK9"
"46GYnOT089mDzNY2zDBB9hPWwdSUYOTbDROlc3Gd4eOudeQqlnAgHB7zqwVGqWuG"
"vbqHWSSPpp6pMilpVVz9SMbL/1BgfhK+dKWIDYHJDRJFpBLFUpe0vq8n+8Mdgp1z"
"NPH3cR+rWK8zI5xF5wIDAQAB"
"\n-----END PUBLIC KEY-----\n";
BIO *bio = BIO_new_mem_buf(chPublicKey, -1);
if (!bio)
{
return -1;
}
RSA* rsa = PEM_read_bio_RSA_PUBKEY(bio, NULL, NULL, NULL);
if (!rsa)
{
return -1;
}
int nLen = RSA_size(rsa);
char* pEncode = (char*)malloc(nLen + 1);
int rc = RSA_public_encrypt(iLen, (const unsigned char*)pData, (unsigned char*)pEncode, rsa, RSA_PKCS1_PADDING);
*pEncodeData = pEncode;
RSA_free(rsa);
CRYPTO_cleanup_all_ex_data();
return rc;
}
/**
* 功能描述:RSA解密
* @param pData：原始数据
* @param ilen: 原始数据长度
* @param pEncodeData: 加密后数据
* @return -1: 失败, 其他: 加密数据长度
**/
int RSADecrypt(const char* pData , int iLen, char** pDecodeData)
{
char chPrivateKey[] = "-----BEGIN RSA PRIVATE KEY-----\n"
"MIICXQIBAAKBgQCb/vAGucNg3OJyBV6/aWEd7IK946GYnOT089mDzNY2zDBB9hPW\n"
"wdSUYOTbDROlc3Gd4eOudeQqlnAgHB7zqwVGqWuGvbqHWSSPpp6pMilpVVz9SMbL\n"
"/1BgfhK+dKWIDYHJDRJFpBLFUpe0vq8n+8Mdgp1zNPH3cR+rWK8zI5xF5wIDAQAB\n"
"AoGBAJesW+KeMbp3afElCYegxV2b/U72CcPiILeOdRoySsHC7NTll0qC8ddHEp1t\n"
"bIG86mZxILgbRjqmROTjkrCmwxv5tHT1LRHz139BPQHbOx+Dx5Q/D9wUzGKSr/Df\n"
"lUsORpqmQjVsgLtCzIZShXr/O2rf8FU6zbtI3f6UQK1wMcxRAkEAydNkWUvSkxC2\n"
"40fA8+6mYFXEWgJpXLcaMX+CqMmE+h/xwDJ7qB0dbqdPA64Pq2jgLAFWlSxF4QWk\n"
"Kp19gaoR/wJBAMXeT0LqCg7RG365KsvXzJVf9gzxN1X0ahhKBSoAS66UgpyVDGcl\n"
"b+NchCepqev6Li/U+Zteg/UrTTNBN8S3fBkCQHyGhX/jHIXI5k7NUuwu71C5GnE+\n"
"06t0/iBUQFXMINQDKbIgc9OCQ0qmyEXI+7oS912vZbCcpHD2fhgdG/cI7BkCQQCK\n"
"gIxWuGAF8xUd5RsxyIJp5NvkP0yOnCFPkzB+L+rJ7yZl2GbwJGJncbEH2lkY1uxR\n"
"ivCVctlHWeIWCIay6gSxAkAF19y/R2dMkop5Pl0UkGCzY4Bgqqmnxs+I+o2Z4EwE\n"
"xc/l6vH6yP3DmelxC4abDk/N7bgaU99lQ2iwN+RpHUpP"
"\n-----END RSA PRIVATE KEY-----\n";
BIO *bio = BIO_new_mem_buf(chPrivateKey, -1);
if (!bio)
{
return -1;
}
RSA* rsa = PEM_read_bio_RSAPrivateKey(bio, NULL, NULL, NULL);
if (!rsa)
{
return -1;
}
int nLen = RSA_size(rsa);
char* pDecode = (char*)malloc(nLen + 1);
memset(pDecode, 0, nLen+1);
int rc = RSA_private_decrypt(nLen ,(unsigned char *)pData,(unsigned char*)pDecode,rsa,RSA_PKCS1_PADDING);
*pDecodeData = pDecode;
RSA_free(rsa);
CRYPTO_cleanup_all_ex_data();
return rc;
}