78 lines
2 KiB
C
78 lines
2 KiB
C
/*
|
|
Copyright (C) 2009-2012 Alexander Butenko <a.butenka@gmail.com>
|
|
Copyright (C) 2009-2012 Christian Dywan <christian@twotoasts.de>
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
*/
|
|
#include <string.h>
|
|
#include <openssl/bio.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/rand.h>
|
|
#include <glib.h>
|
|
#define BUF_SIZE 256
|
|
|
|
typedef unsigned char uc;
|
|
|
|
const char *iv ="12345678";
|
|
|
|
gchar*
|
|
formhistory_encrypt (const gchar* input,
|
|
unsigned char* key)
|
|
{
|
|
int outlen=0, auxlen=0;
|
|
EVP_CIPHER_CTX ctx;
|
|
size_t inputSize;
|
|
char buff[BUF_SIZE];
|
|
|
|
if (!input)
|
|
return NULL;
|
|
|
|
inputSize = strlen (input);
|
|
memset (&buff[0], '\0', BUF_SIZE);
|
|
|
|
EVP_CIPHER_CTX_init (&ctx);
|
|
EVP_EncryptInit (&ctx, EVP_bf_cbc (), key, (unsigned char*)iv);
|
|
|
|
if (EVP_EncryptUpdate (&ctx, (uc*)&buff, &outlen, (uc*)input, inputSize) != 1)
|
|
return NULL;
|
|
if (EVP_EncryptFinal (&ctx, (uc*)&buff + outlen, &auxlen) != 1)
|
|
return NULL;
|
|
|
|
outlen += auxlen;
|
|
EVP_CIPHER_CTX_cleanup (&ctx);
|
|
return g_base64_encode ((const guchar*)&buff, outlen);
|
|
}
|
|
|
|
gchar*
|
|
formhistory_decrypt (const gchar* b64input,
|
|
unsigned char* key)
|
|
{
|
|
int outlen=0, auxlen=0;
|
|
EVP_CIPHER_CTX ctx;
|
|
char buff[BUF_SIZE];
|
|
guchar* input;
|
|
size_t inputSize;
|
|
|
|
if (!b64input)
|
|
return NULL;
|
|
|
|
input = g_base64_decode (b64input, &inputSize);
|
|
memset (&buff, 0, BUF_SIZE);
|
|
|
|
EVP_CIPHER_CTX_init (& ctx);
|
|
EVP_DecryptInit (& ctx, EVP_bf_cbc(), key, (uc*)iv);
|
|
|
|
if (EVP_DecryptUpdate (& ctx, (uc*)&buff, &outlen, (uc*)input, inputSize) != 1)
|
|
return NULL;
|
|
if (EVP_DecryptFinal (& ctx, (uc*)&buff + outlen, &auxlen) != 1)
|
|
return NULL;
|
|
|
|
outlen += auxlen;
|
|
g_free (input);
|
|
EVP_CIPHER_CTX_cleanup (&ctx);
|
|
return g_strndup (buff, outlen);
|
|
}
|