CACIC_Crypt.cpp
1.79 KB
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/**
* Copyright (C) 2009 DATAPREV-ES
* @author Vinicius Avellar Moreira
* Classe para criptografia de dados.
*/
#include "CACIC_Crypt.h"
const unsigned int CACIC_Crypt::SRCACIC_BLOCK_SIZE = 16;
const unsigned int CACIC_Crypt::SRCACIC_KEY_SIZE = 16;
const char CACIC_Crypt::SRCACIC_KEY[17] = "CacicBrasil";
const char CACIC_Crypt::SRCACIC_IV[17] = "abcdefghijklmnop";
// Tira do base64 e desencripta.
string CACIC_Crypt::decodifica(const char* entrada)
{
string decode_base64;
string entradaStr = string(entrada);
CACIC_Utils::simpleUrlDecode(entradaStr);
decode_base64 = base64_decode(entradaStr);
unsigned int saida_len = decode_base64.length();
char* saida = new char[saida_len + 1];
memset(saida, 0, saida_len + 1);
CRijndael oRijndael;
oRijndael.MakeKey(SRCACIC_KEY, SRCACIC_IV, SRCACIC_KEY_SIZE, SRCACIC_BLOCK_SIZE);
oRijndael.Decrypt(decode_base64.c_str(), saida, saida_len, CRijndael::CBC);
string out(saida);
delete []saida;
return out;
}
// Encripta e coloca no base64.
string CACIC_Crypt::codifica(const char* entrada)
{
unsigned int entrada_len = strlen(entrada);
unsigned int saida_len = (int)ceil((float)(entrada_len)/SRCACIC_BLOCK_SIZE)*SRCACIC_BLOCK_SIZE;
char* saida = new char[saida_len + 1];
memset(saida, 0, saida_len + 1);
char* zerof_entrada = new char[saida_len + 1];
memset(zerof_entrada, 0, saida_len + 1);
strncpy(zerof_entrada, entrada, entrada_len);
CRijndael oRijndael;
oRijndael.MakeKey(SRCACIC_KEY, SRCACIC_IV, SRCACIC_KEY_SIZE, SRCACIC_BLOCK_SIZE);
oRijndael.Encrypt(zerof_entrada, saida, saida_len, CRijndael::CBC);
string encode_base64;
encode_base64 = base64_encode(reinterpret_cast<const unsigned char*>(saida), saida_len);
delete []saida;
delete []zerof_entrada;
return encode_base64;
}