You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
3.0 KiB
104 lines
3.0 KiB
/*
|
|
* UBCryptoUtils.cpp
|
|
*
|
|
* Created on: 23 sept. 2009
|
|
* Author: Luc
|
|
*/
|
|
|
|
#include "UBCryptoUtils.h"
|
|
|
|
#include <openssl/aes.h>
|
|
|
|
#include "core/memcheck.h"
|
|
|
|
UBCryptoUtils* UBCryptoUtils::sInstance(0);
|
|
QString UBCryptoUtils::sAESKey("9ecHaspud9uD9ste5erAchehefrup3echej-caje6&thestawacuk=h#F3jet3aF");
|
|
QString UBCryptoUtils::sAESSalt("6f0083e0-a90c-11de-ac21-0002a5d5c51b");
|
|
|
|
|
|
UBCryptoUtils::UBCryptoUtils(QObject * pParent)
|
|
: QObject(pParent)
|
|
{
|
|
aesInit();
|
|
}
|
|
|
|
|
|
UBCryptoUtils::~UBCryptoUtils()
|
|
{
|
|
// TODO UB 4.x aes destroy
|
|
}
|
|
|
|
|
|
QString UBCryptoUtils::symetricEncrypt(const QString& clear)
|
|
{
|
|
QByteArray clearData = clear.toUtf8();
|
|
|
|
int cipheredLength = clearData.length() + AES_BLOCK_SIZE;
|
|
int paddingLength = 0;
|
|
unsigned char *ciphertext = (unsigned char *)malloc(cipheredLength);
|
|
|
|
if(!EVP_EncryptInit_ex(&mAesEncryptContext, NULL, NULL, NULL, NULL))
|
|
return QString();
|
|
|
|
if(!EVP_EncryptUpdate(&mAesEncryptContext, ciphertext, &cipheredLength, (unsigned char *)clearData.data(), clearData.length()))
|
|
return QString();
|
|
|
|
/* update ciphertext with the final remaining bytes */
|
|
if(!EVP_EncryptFinal_ex(&mAesEncryptContext, ciphertext + cipheredLength, &paddingLength))
|
|
return QString();
|
|
|
|
QByteArray cipheredData((const char *)ciphertext, cipheredLength + paddingLength);
|
|
|
|
free(ciphertext);
|
|
|
|
return QString::fromAscii(cipheredData.toBase64());
|
|
}
|
|
|
|
|
|
QString UBCryptoUtils::symetricDecrypt(const QString& encrypted)
|
|
{
|
|
QByteArray encryptedData = QByteArray::fromBase64(encrypted.toAscii());
|
|
|
|
int encryptedLength = encryptedData.length();
|
|
int paddingLength = 0;
|
|
unsigned char *plaintext = (unsigned char *)malloc(encryptedLength);
|
|
|
|
if(!EVP_DecryptInit_ex(&mAesDecryptContext, NULL, NULL, NULL, NULL))
|
|
return QString();
|
|
|
|
if(!EVP_DecryptUpdate(&mAesDecryptContext, plaintext, &encryptedLength, (const unsigned char *)encryptedData.data(), encryptedData.length()))
|
|
return QString();
|
|
|
|
if(!EVP_DecryptFinal_ex(&mAesDecryptContext, plaintext + encryptedLength, &paddingLength))
|
|
return QString();
|
|
|
|
int len = encryptedLength + paddingLength;
|
|
QByteArray clearData((const char *)plaintext, len);
|
|
|
|
free(plaintext);
|
|
|
|
return QString::fromUtf8(clearData);;
|
|
}
|
|
|
|
|
|
void UBCryptoUtils::aesInit()
|
|
{
|
|
int i, nrounds = 5;
|
|
unsigned char key[32], iv[32];
|
|
unsigned char *key_data = (unsigned char *)sAESKey.toAscii().data();
|
|
int key_data_len = sAESKey.length();
|
|
|
|
i = EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha1(), (unsigned char *)sAESSalt.toAscii().data(), key_data,
|
|
key_data_len, nrounds, key, iv);
|
|
|
|
if (i != 32)
|
|
{
|
|
qWarning() << QString("Key size is %1 bits - should be 256 bits").arg(i);
|
|
return;
|
|
}
|
|
|
|
EVP_CIPHER_CTX_init(&mAesEncryptContext);
|
|
EVP_EncryptInit_ex(&mAesEncryptContext, EVP_aes_256_cbc(), NULL, key, iv);
|
|
EVP_CIPHER_CTX_init(&mAesDecryptContext);
|
|
EVP_DecryptInit_ex(&mAesDecryptContext, EVP_aes_256_cbc(), NULL, key, iv);
|
|
}
|
|
|