midori/extensions/formhistory/formhistory-crypt.c

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/*
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,
const gchar* key)
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{
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 (), (unsigned char*)key, (unsigned char*)iv);
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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,
const gchar* key)
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{
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(), (unsigned char*)key, (uc*)iv);
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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);
}