求翻译一段C代码为易代码

无敌小萌神

  

#include "stdafx.h"
#include
#include
#include
#include
#include

// #define ANDROID_WECHAT

#define SQLITE_FILE_HEADER "SQLite format 3" //length == 16
#define IV_SIZE 16
#define HMAC_SHA1_SIZE 20
#define KEY_SIZE 32

#ifndef ANDROID_WECHAT
#define DEFAULT_PAGESIZE 4096
#define DEFAULT_ITER 64000
#else
#define NO_USE_HMAC_SHA1
#define DEFAULT_PAGESIZE 1024
#define DEFAULT_ITER 4000
#endif
unsigned char pass[] = { 0x5C, 0xF8, 0x6A, 0x13, 0x61, 0xA1, 0x46, 0x14, 0x98, 0x6C, 0x2D, 0x6F, 0x5E, 0x6C, 0x16, 0x81, 0xB8, 0xCF, 0x5D, 0x3F, 0xD2, 0xEB, 0x49, 0xCE, 0xAF, 0xFB, 0x88, 0xE3, 0xD8, 0x28, 0xC7, 0xBD };

int _tmain (int argc, _TCHAR* argv[])
{
FILE *fpdb = fopen ("MicroMsg.db", "rb+");
if (!fpdb)
{
return 0;
}
fseek (fpdb, 0, SEEK_END);
long nFileSize = ftell (fpdb);
fseek (fpdb, 0, SEEK_SET);
unsigned char *pDbBuffer = new unsigned char[nFileSize];
fread (pDbBuffer, 1, nFileSize, fpdb);
fclose (fpdb);

unsigned char salt[16] = { 0 };
memcpy (salt, pDbBuffer, 16);

#ifndef NO_USE_HMAC_SHA1
unsigned char mac_salt[16] = { 0 };
memcpy (mac_salt, salt, 16);
for (int i = 0; i < sizeof (salt); i++)
{
mac_salt[i] ^= 0x3a;
}
#endif

int reserve = IV_SIZE;
#ifndef NO_USE_HMAC_SHA1
reserve += HMAC_SHA1_SIZE;
#endif
reserve = ( (reserve % AES_BLOCK_SIZE) == 0) ? reserve : ( (reserve / AES_BLOCK_SIZE) + 1) * AES_BLOCK_SIZE;

unsigned char key[KEY_SIZE] = { 0 };
unsigned char mac_key[KEY_SIZE] = { 0 };

OpenSSL_add_all_algorithms ();
PKCS5_PBKDF2_HMAC_SHA1 ( (const char *)pass, sizeof (pass), salt, sizeof (salt), DEFAULT_ITER, sizeof (key), key);
#ifndef NO_USE_HMAC_SHA1
PKCS5_PBKDF2_HMAC_SHA1 ( (const char *)key, sizeof (key), mac_salt, sizeof (mac_salt), 2, sizeof (mac_key), mac_key);
#endif

unsigned char *pTemp = pDbBuffer;
unsigned char pDecryptPerPageBuffer[DEFAULT_PAGESIZE];
int nPage = 1;
int offset = 16;
while (pTemp < pDbBuffer + nFileSize)
{
printf ("decrypt page:%d/%d \n", nPage, nFileSize / DEFAULT_PAGESIZE);

#ifndef NO_USE_HMAC_SHA1
//check hmac
unsigned char hash_mac[HMAC_SHA1_SIZE] = { 0 };
unsigned int hash_len = 0;
HMAC_CTX hctx;
HMAC_CTX_init (&hctx);
HMAC_Init_ex (&hctx, mac_key, sizeof (mac_key), EVP_sha1 (), NULL);
HMAC_Update (&hctx, pTemp + offset, DEFAULT_PAGESIZE - reserve - offset + IV_SIZE);
HMAC_Update (&hctx, (const unsigned char *)&nPage, sizeof (nPage));
HMAC_Final (&hctx, hash_mac, &hash_len);
HMAC_CTX_cleanup (&hctx);
if (0 != memcmp (hash_mac, pTemp + DEFAULT_PAGESIZE - reserve + IV_SIZE, sizeof (hash_mac)))
{
//hash check err
return 0;
}
#endif
//
if (nPage == 1)
{
memcpy (pDecryptPerPageBuffer, SQLITE_FILE_HEADER, offset);
}

//aes decrypt
EVP_CIPHER_CTX* ectx = EVP_CIPHER_CTX_new ();
EVP_CipherInit_ex (ectx, EVP_get_cipherbyname ("aes-256-cbc"), NULL, NULL, NULL, 0);
EVP_CIPHER_CTX_set_padding (ectx, 0);
EVP_CipherInit_ex (ectx, NULL, NULL, key, pTemp + (DEFAULT_PAGESIZE - reserve), 0);

int nDecryptLen = 0;
int nTotal = 0;
EVP_CipherUpdate (ectx, pDecryptPerPageBuffer + offset, &nDecryptLen, pTemp + offset, DEFAULT_PAGESIZE - reserve - offset);
nTotal = nDecryptLen;
EVP_CipherFinal_ex (ectx, pDecryptPerPageBuffer + offset + nDecryptLen, &nDecryptLen);
nTotal += nDecryptLen;
EVP_CIPHER_CTX_free (ectx);

//assert (nTotal == DEFAULT_PAGESIZE - reserve - offset);

//no necessary ,just like sqlcipher
memcpy (pDecryptPerPageBuffer + DEFAULT_PAGESIZE - reserve, pTemp + DEFAULT_PAGESIZE - reserve, reserve);

FILE *fp = fopen ("MicroMsg_Decrypt.db", "ab+");
{
fwrite (pDecryptPerPageBuffer, 1, DEFAULT_PAGESIZE, fp);
fclose (fp);
}

nPage++;
offset = 0;
pTemp += DEFAULT_PAGESIZE;
}
return 0;

#include "stdafx.h"<br /> #include <br /> #include <br /> #include <br /> #include <br /> #include <br /> <br /> //#define ANDROID_WECHAT<br /> <br /> #define SQLITE_FILE_HEADER "SQLite format 3" //length == 16<br /> #define IV_SIZE 16<br /> #define HMAC_SHA1_SIZE 20<br /> #define KEY_SIZE 32<br /> <br /> #ifndef ANDROID_WECHAT<br /> #define DEFAULT_PAGESIZE 4096<br /> #define DEFAULT_ITER 64000<br /> #else<br /> #define NO_USE_HMAC_SHA1<br /> #define DEFAULT_PAGESIZE 1024<br /> #define DEFAULT_ITER 4000<br /> #endif<br /> <br /> <br /> <br /> unsigned char pass[] = { 0x5C, 0xF8, 0x6A, 0x13, 0x61, 0xA1, 0x46, 0x14, 0x98, 0x6C, 0x2D, 0x6F, 0x5E, 0x6C, 0x16, 0x81, 0xB8, 0xCF, 0x5D, 0x3F, 0xD2, 0xEB, 0x49, 0xCE, 0xAF, 0xFB, 0x88, 0xE3, 0xD8, 0x28, 0xC7, 0xBD };<br /> <br /> int _tmain(int argc, _TCHAR* argv[])<br /> {<br />     FILE *fpdb = fopen("MicroMsg.db", "rb+");<br />     if (!fpdb)<br />     {<br />         return 0;<br />     }<br />     fseek(fpdb, 0, SEEK_END);<br />     long nFileSize = ftell(fpdb);<br />     fseek(fpdb, 0, SEEK_SET);<br />     unsigned char *pDbBuffer = new unsigned char[nFileSize];<br />     fread(pDbBuffer, 1, nFileSize, fpdb);<br />     fclose(fpdb);<br /> <br />     unsigned char salt[16] = { 0 };<br />     memcpy(salt, pDbBuffer, 16);<br /> <br /> #ifndef NO_USE_HMAC_SHA1<br />     unsigned char mac_salt[16] = { 0 };<br />     memcpy(mac_salt, salt, 16);<br />     for (int i = 0; i < sizeof(salt); i++)<br />     {<br />         mac_salt<i> ^= 0x3a;<br />     }<br /> #endif<br /> <br />     int reserve = IV_SIZE;<br /> #ifndef NO_USE_HMAC_SHA1<br />     reserve += HMAC_SHA1_SIZE;<br /> #endif<br />     reserve = ((reserve % AES_BLOCK_SIZE) == 0) ? reserve : ((reserve / AES_BLOCK_SIZE) + 1) * AES_BLOCK_SIZE;<br /> <br />     unsigned char key[KEY_SIZE] = { 0 };<br />     unsigned char mac_key[KEY_SIZE] = { 0 };<br /> <br />     OpenSSL_add_all_algorithms();<br />     PKCS5_PBKDF2_HMAC_SHA1((const char *)pass, sizeof(pass), salt, sizeof(salt), DEFAULT_ITER, sizeof(key), key);<br /> #ifndef NO_USE_HMAC_SHA1<br />     PKCS5_PBKDF2_HMAC_SHA1((const char *)key, sizeof(key), mac_salt, sizeof(mac_salt), 2, sizeof(mac_key), mac_key);<br /> #endif<br /> <br />     unsigned char *pTemp = pDbBuffer;<br />     unsigned char pDecryptPerPageBuffer[DEFAULT_PAGESIZE];<br />     int nPage = 1;<br />     int offset = 16;<br />     while (pTemp < pDbBuffer + nFileSize)<br />     {<br />         printf("decrypt page:%d/%d \n", nPage, nFileSize / DEFAULT_PAGESIZE);<br /> <br /> #ifndef NO_USE_HMAC_SHA1<br />         //check hmac<br />         unsigned char hash_mac[HMAC_SHA1_SIZE] = { 0 };<br />         unsigned int hash_len = 0;<br />         HMAC_CTX hctx;<br />         HMAC_CTX_init(&hctx);<br />         HMAC_Init_ex(&hctx, mac_key, sizeof(mac_key), EVP_sha1(), NULL);<br />         HMAC_Update(&hctx, pTemp + offset, DEFAULT_PAGESIZE - reserve - offset + IV_SIZE);<br />         HMAC_Update(&hctx, (const unsigned char *)&nPage, sizeof(nPage));<br />         HMAC_Final(&hctx, hash_mac, &hash_len);<br />         HMAC_CTX_cleanup(&hctx);<br />         if (0 != memcmp(hash_mac, pTemp + DEFAULT_PAGESIZE - reserve + IV_SIZE, sizeof(hash_mac)))<br />         {<br />             //hash check err<br />             return 0;<br />         }<br /> #endif<br />         //<br />         if (nPage == 1)<br />         {<br />             memcpy(pDecryptPerPageBuffer, SQLITE_FILE_HEADER, offset);<br />         }<br /> <br />         //aes decrypt<br />         EVP_CIPHER_CTX* ectx = EVP_CIPHER_CTX_new();<br />         EVP_CipherInit_ex(ectx, EVP_get_cipherbyname("aes-256-cbc"), NULL, NULL, NULL, 0);<br />         EVP_CIPHER_CTX_set_padding(ectx, 0);<br />         EVP_CipherInit_ex(ectx, NULL, NULL, key, pTemp + (DEFAULT_PAGESIZE - reserve), 0);<br /> <br />         int nDecryptLen = 0;<br />         int nTotal = 0;<br />         EVP_CipherUpdate(ectx, pDecryptPerPageBuffer + offset, &nDecryptLen, pTemp + offset, DEFAULT_PAGESIZE - reserve - offset);<br />         nTotal = nDecryptLen;<br />         EVP_CipherFinal_ex(ectx, pDecryptPerPageBuffer + offset + nDecryptLen, &nDecryptLen);<br />         nTotal += nDecryptLen;<br />         EVP_CIPHER_CTX_free(ectx);<br /> <br />         //assert(nTotal == DEFAULT_PAGESIZE - reserve - offset);<br /> <br />         //no necessary ,just like sqlcipher<br />         memcpy(pDecryptPerPageBuffer + DEFAULT_PAGESIZE - reserve, pTemp + DEFAULT_PAGESIZE - reserve, reserve);<br /> <br />         FILE *fp = fopen("MicroMsg_Decrypt.db", "ab+");<br />         {<br />             fwrite(pDecryptPerPageBuffer, 1, DEFAULT_PAGESIZE, fp);<br />             fclose(fp);<br />         }<br /> <br />         nPage++;<br />         offset = 0;<br />         pTemp += DEFAULT_PAGESIZE;<br />     }<br /> <br />     return 0;

可能粘贴的有点乱  原文地址“https://bbs.pediy.com/thread-222652.htm”

花诗雨露

太长了。。。。。

15236440207

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