I have to encrypt and decrypt using tripleDES to send some information to a specific server. The server use java to decrypt and I use PHP to encrypt and decrypt data.
I have tried using this PHP Equivalent for Java Triple DES encryption/decryption but it does not work for my problem.
My java code is the following: Note: Cadena means "string" and Llave means "key". The java code is not mine.
public class TripleDes {
public static String EncryptTripleDES(String Cadena, String Llave)
{
String cryptedString = "";
try{
SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("DESede");
Cipher desEdeCipher = Cipher.getInstance("DESede/ECB/NoPadding");
MessageDigest localMessageDigest = MessageDigest.getInstance("MD5");
byte[] arrayOfByte1 = Llave.getBytes();
byte[] arrayOfByte3 = new byte[24];
localMessageDigest.update(arrayOfByte1);
byte[] result = localMessageDigest.digest();
for (int i=0; i<999; i++){
localMessageDigest.update(result);
result = localMessageDigest.digest();
}
byte[] arrayOfByte4 = result;
for (int n=0; n<16; n++)
arrayOfByte3[n] = arrayOfByte4[n];
for (int n=0; n<8; n++)
arrayOfByte3[(16 + n)] = arrayOfByte4[n];
DESedeKeySpec localDESedeKeySpec = new DESedeKeySpec(arrayOfByte3, 0);
SecretKey desEdeKey = secretKeyFactory.generateSecret(localDESedeKeySpec);
desEdeCipher.init(1, desEdeKey);
byte[] arrayOfByte = new byte[Cadena.length() % 8 > 0 ? Cadena.length() + 8 - Cadena.length() % 8 : Cadena.length()];
System.arraycopy(Cadena.getBytes(), 0, arrayOfByte, 0, Cadena.length());
//Resultado en base 64:
String b_64 = encryptaBase64(desEdeCipher.doFinal(arrayOfByte));
//Convertir resultado a cadena en hexadecimal
cryptedString = StringToHexString(b_64);
}catch(Exception e){
e.printStackTrace();
}
return cryptedString;
}
public static String StringToHexString(String s) {
StringBuffer stringbuffer = new StringBuffer(s.length() * 2);
for (int i = 0; i < s.length(); i++) {
int j = s.charAt(i) & 0xff;
if (j < 16)
stringbuffer.append('0');
stringbuffer.append(Integer.toHexString(j));
}
return stringbuffer.toString().toUpperCase();
}
public static String encryptaBase64(byte[] paramArrayOfByte) throws Exception{
int i = paramArrayOfByte.length;
int j = (i * 4 + 2) / 3;
int k = (i + 2) / 3 * 4;
byte[] result = new byte[k];
char[] map1 = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'};
int m = 0;
for (int n = 0; m < i; n++)
{
int i1 = paramArrayOfByte[(m++)] & 0xFF;
int i2 = m < i ? paramArrayOfByte[(m++)] & 0xFF : 0;
int i3 = m < i ? paramArrayOfByte[(m++)] & 0xFF : 0;
int i4 = i1 >>> 2;
int i5 = (i1 & 0x3) << 4 | i2 >>> 4;
int i6 = (i2 & 0xF) << 2 | i3 >>> 6;
int i7 = i3 & 0x3F;
result[(n++)] = ((byte)map1[i4]);
result[(n++)] = ((byte)map1[i5]);
result[n] = ((byte)(n < j ? map1[i6] : 61)); n++;
result[n] = ((byte)(n < j ? map1[i7] : 61));
}
return new String(result);
}
public static String DecryptTripleDES(String Cadena, String Llave)
{
String decryptedString = "";
try
{
SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("DESede");
Cipher desEdeCipher = Cipher.getInstance("DESede/ECB/NoPadding");
MessageDigest localMessageDigest = MessageDigest.getInstance("MD5");
byte[] arrayOfByte1 = Llave.getBytes();
byte[] arrayOfByte3 = new byte[24];
localMessageDigest.update(arrayOfByte1);
byte[] result = localMessageDigest.digest();
for (int i=0; i<999; i++){
localMessageDigest.update(result);
result = localMessageDigest.digest();
}
byte[] arrayOfByte4 = result;
for (int n=0; n<16; n++)
arrayOfByte3[n] = arrayOfByte4[n];
for (int n=0; n<8; n++)
arrayOfByte3[(16 + n)] = arrayOfByte4[n];
DESedeKeySpec localDESedeKeySpec = new DESedeKeySpec(arrayOfByte3, 0);
SecretKey desEdeKey = secretKeyFactory.generateSecret(localDESedeKeySpec);
desEdeCipher.init(2, desEdeKey);
//Convertir cadena hexadecimal a String
String hexString = "";
for(int i = 0; i < Cadena.length()/2; i++){
int k = Integer.parseInt(Cadena.substring(i*2, (i*2)+2), 16);
hexString += (char)k;
}
result = desEdeCipher.doFinal(decrypt(hexString.getBytes()));
decryptedString = new String(result).trim();
}
catch(Exception e){
e.printStackTrace();
}
return decryptedString;
}
public static byte[] decrypt(byte[] paramArrayOfByte) throws Exception {
byte[] map2 = new byte[256];
char[] map1 = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'};
for (int i = 0; i < map2.length; i++) map2[i] = -1;
for (int i = 0; i < 64; i++) map2[map1[i]] = ((byte)i);
int i = paramArrayOfByte.length;
if (i % 4 != 0) throw new IllegalArgumentException("Length of Base64 encoded input string is not a multiple of 4.");
while ((i > 0) && (paramArrayOfByte[(i - 1)] == 61)) i--;
int j = i * 3 / 4;
byte[] result = new byte[j];
int k = 0;
int m = 0;
while (k < i)
{
int n = paramArrayOfByte[(k++)];
int i1 = paramArrayOfByte[(k++)];
int i2 = k < i ? paramArrayOfByte[(k++)] : 65;
int i3 = k < i ? paramArrayOfByte[(k++)] : 65;
if ((n > 127) || (i1 > 127) || (i2 > 127) || (i3 > 127))
throw new IllegalArgumentException("Illegal character in Base64 encoded data.");
int i4 = map2[n];
int i5 = map2[i1];
int i6 = map2[i2];
int i7 = map2[i3];
if ((i4 < 0) || (i5 < 0) || (i6 < 0) || (i7 < 0))
throw new IllegalArgumentException("Illegal character in Base64 encoded data.");
int i8 = i4 << 2 | i5 >>> 4;
int i9 = (i5 & 0xF) << 4 | i6 >>> 2;
int i10 = (i6 & 0x3) << 6 | i7;
result[(m++)] = ((byte)i8);
if (m < j) result[(m++)] = ((byte)i9);
if (m < j) result[(m++)] = ((byte)i10);
}
return result;
}
}
My PHP code:
function encrypt($key, $data) {
$rc4 = new rc4();
//$size = mcrypt_get_block_size('des', 'ecb');
//$data = pkcs5_pad($data, $size);
$mcrypt_module = mcrypt_module_open(MCRYPT_TRIPLEDES, '', 'ecb', '');
$mcrypt_iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($mcrypt_module), MCRYPT_RAND);
$key_size = mcrypt_enc_get_key_size($mcrypt_module);
mcrypt_generic_init($mcrypt_module,$key,$mcrypt_iv);
$encrypted = base64_encode(mcrypt_generic($mcrypt_module, $data));
mcrypt_module_close($mcrypt_module);
return $rc4->StringToHexString($encrypted);
}
function decrypt($key, $data) {
$mcrypt_module = mcrypt_module_open(MCRYPT_TRIPLEDES, '', 'ecb', '');
$mcrypt_iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($mcrypt_module), MCRYPT_RAND);
$decrypted = mcrypt_decrypt(MCRYPT_TRIPLEDES, $key, base64_encode($data), 'ecb', $mcrypt_iv);
mcrypt_module_close($mcrypt_module);
return pkcs5_unpad($decrypted);
}
function pkcs5_pad($text, $blocksize) {
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
function pkcs5_unpad($text) {
$pad = ord($text{strlen($text)-1});
if ($pad > strlen($text)) return false;
if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false;
return substr($text, 0, -1 * $pad);
}
StringToHexString is a method which converts a String into Hexadecimal String.
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