I have this code from our old system in .NET, and I need to rewrite it in PHP.
try{
byte[] heslo = Encoding.UTF8.GetBytes(Pwd);
byte[] salt = Encoding.UTF8.GetBytes(String.Format("source={0}&owner={1}&usercode={2}&ts={3}", Source, Owner, UserCode, ts));
int iterations = 8;
byte[] output = null;
using (var hmac = new HMACSHA256()){
var df = new Pbkdf2(hmac, heslo, salt, iterations);
output = df.GetBytes(20);
token.Value = BitConverter.ToString(output).Replace("-", "").ToLowerInvariant();
}
}catch{
token = null;
}
return token;
}
I tried to use
openssl_pbkdf2( $password,$salt,20,8,"SHA256");
with the same values in both scripts but in php I'm getting different output, can anyone help me. Please
I have a program that encrypts passwords using a c# rsa public key which outputs a byte array.
In order for me to transport it easily and maintain data I am converting the bytes directly to a Hex string. Now this is where I am having issue. I send the post data to my script and am now unsure what to convert it to and how to decrypt it.
I am attempting to use http://phpseclib.sourceforge.net/ which I was pointed to by this post RSA decryption using private key The documentation on this is very vague and I don't know what data/type decrypt() should take.
<?php
include('Crypt/RSA.php');
if (isset($_POST['Password']))
{
$Password = $_POST['Password'];
$crypttext = pack("H*",$Password);
echo $cryptext;
$rsa = new Crypt_RSA();
$rsa->loadKey('key.priv');
$decryptedText =$rsa->decrypt($cryptext);
echo "Pass = >" . $decryptedText;
}
?>
Note that this gives no errors but $decryptedText is empty.
EDIT: Adding more info.
This is my c# encrypt method.
public static string Encrypt(string data, string keyLocation, string keyName)
{
Console.WriteLine("-------------------------BEGIN Encrypt--------------------");
// Variables
CspParameters cspParams = null;
RSACryptoServiceProvider rsaProvider = null;
string publicKeyText = "";
string result = "";
byte[] plainBytes = null;
byte[] encryptedBytes = null;
try
{
// Select target CSP
cspParams = new CspParameters();
cspParams.ProviderType = 1; // PROV_RSA_FULL
rsaProvider = new RSACryptoServiceProvider(2048, cspParams);
// Read public key from Server
WebClient client = new WebClient();
Stream stream = client.OpenRead(keyLocation + "/" + keyName);
StreamReader reader = new StreamReader(stream);
publicKeyText = reader.ReadToEnd();
//
//Console.WriteLine("Key Text : {0}",publicKeyText);
// Import public key
rsaProvider.FromXmlString(publicKeyText);
// Encrypt plain text
plainBytes = Convert.FromBase64String(data);
Console.WriteLine("inputlength : {0}",plainBytes.Length);
encryptedBytes = rsaProvider.Encrypt(plainBytes, false);
result = ByteArrayToString(encryptedBytes);
Console.WriteLine("Encrypted Hex string : {0}", result);
}
catch (Exception ex)
{
// Any errors? Show them
Console.WriteLine("Exception encrypting file! More info:");
Console.WriteLine(ex.Message);
}
rsaProvider.Dispose();
Console.WriteLine("-------------------------END Encrypt--------------------");
return result;
} // Encrypt
public static byte[] StringToByteArray(String hex)
{
int NumberChars = hex.Length / 2;
byte[] bytes = new byte[NumberChars];
using (var sr = new StringReader(hex))
{
for (int i = 0; i < NumberChars; i++)
bytes[i] =
Convert.ToByte(new string(new char[2] { (char)sr.Read(), (char)sr.Read() }), 16);
}
return bytes;
}
public static string ByteArrayToString(byte[] ba)
{
StringBuilder hex = new StringBuilder(ba.Length * 2);
foreach (byte b in ba)
hex.AppendFormat("{0:x2}", b);
return hex.ToString();
}
I modified the php to this
<?php
include('Crypt/RSA.php');
if (isset($_POST['Password']))
{
$Password = $_POST['Password'];
$crypttext = pack("H*",$Password);
echo $cryptext;
$rsa = new Crypt_RSA();
$rsa->loadKey(file_get_contents('key.priv')); // Added file_get_contents() which fixed the key loading
$rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1); // Added this which is essential thank you guys/gals
$decryptedText =$rsa->decrypt($cryptext);
echo "Pass = >" . $decryptedText; // gives unsual data. This needs to be converted from binary data to base64string I think
echo "Pass = >" . base64_encode($decryptedText); // gives no data.
echo "Pass = >" . base64_decode($decryptedText); // gives no data.
}
?>
I searched around and tried several things to convert back to text and I have tried base64_encode() and base64_decode() but I get nothing and otherwise I get gobbledey gook.
The final solution was to use imap_binary($decryptedText) to convert back.
Edit :
It has since been brought to my attention that a better way of doing this would be to replace 2 things
C#
plainBytes = Convert.FromBase64String(data);
Changed to
plainBytes = Encoding.UTF8.GetBytes(data);
and PHP
imap_binary($decryptedText)
Changed to
utf8_decode($decryptedText)
I am trying to write a function in PHP and in VB.NET that uses Triple DES to pass in BOTH directions encrypted data. The problem, is that when I try to decrypt a string encrypted in VB.NET using PHP, I get an error message saying that the block size of the IV must match.
The class I wrote in VB.NET, is as follows and is fully functional as it will encrypt and decrypt its own blocks flawlessly.
Imports System
Imports System.Text
Imports System.IO
Imports System.Security.Cryptography
Public Class Cipher
Dim method As TripleDESCryptoServiceProvider
Dim key As Byte()
Public Property Password() As String
Get
Return System.Text.Encoding.Unicode.GetString(Key)
End Get
Set(value As String)
key = System.Text.Encoding.Unicode.GetBytes(value)
End Set
End Property
Public Function Encrypt(data As String) As String
Dim ms As New System.IO.MemoryStream
' Create the encoder to write to the stream.
Dim dataBytes() As Byte = System.Text.Encoding.Unicode.GetBytes(data)
Dim encStream As New CryptoStream(ms, method.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write)
' Use the crypto stream to write the byte array to the stream.
encStream.Write(dataBytes, 0, dataBytes.Length)
encStream.FlushFinalBlock()
' IV and Ciphered string are each Base64'd and seperated by a comma, then the whole result is Base64'd
Return Convert.ToBase64String(System.Text.Encoding.Unicode.GetBytes(Convert.ToBase64String(method.IV) & "," & Convert.ToBase64String(ms.ToArray)))
End Function
Public Function Decrypt(data As String) As String
' Convert the encrypted text string to a byte array.
Dim partDecoded As String = System.Text.Encoding.Unicode.GetString(Convert.FromBase64String(data))
Dim dataBytes() As Byte
If InStr(partDecoded, ",") > 0 Then
Dim parts() As String = Split(partDecoded, ",")
' Get IV from first part
method.IV = Convert.FromBase64String(parts(0))
' Get ciphered data from second part
dataBytes = Convert.FromBase64String(parts(1))
' Create the stream.
Dim ms As New System.IO.MemoryStream
' Create the decoder to write to the stream.
Dim decStream As New CryptoStream(ms, method.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write)
' Use the crypto stream to write the byte array to the stream.
decStream.Write(dataBytes, 0, dataBytes.Length)
decStream.FlushFinalBlock()
' Convert the plaintext stream to a string.
Return System.Text.Encoding.Unicode.GetString(ms.ToArray)
Else
Return False
End If
End Function
Public Sub New()
method = New TripleDESCryptoServiceProvider
method.Mode = CipherMode.CFB
method.GenerateIV()
End Sub
End Class
Example usage of the above class
Dim c As New Cipher
c.Password = "12345"
Dim encrypted As String = c.Encrypt("hello")
Debug.Print(encrypted)
Dim decrypted As String = c.Decrypt(encrypted)
Debug.Print(decrypted)
Now I also have the following PHP code which ALSO works (by itself)
class Cipher {
private $iv;
private $securekey;
function __construct($key) {
$this->securekey = $key;
}
function encrypt($string) {
$this->iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_3DES, MCRYPT_MODE_CFB),MCRYPT_DEV_RANDOM);
$encrypted = base64_encode(mcrypt_encrypt(MCRYPT_3DES, $this->securekey, $string, MCRYPT_MODE_CFB, $this->iv));
return base64_encode(base64_encode($this->iv) . ',' . $encrypted);
}
function decrypt($string) {
$decrypt = base64_decode($string);
if(strpos($decrypt,',') > 0) {
$decrypt = explode(',', $decrypt);
$this->iv = base64_decode($decrypt[0]);
return trim(mcrypt_decrypt(MCRYPT_3DES, $this->securekey, base64_decode($decrypt[1]), MCRYPT_MODE_CFB, $this->iv));
} else {
return false;
}
}
}
PHP Example Usage
$c = new Cipher("12345");
$encrypted = $c->encrypt("hello");
echo 'Encrypted: ' . $encrypted . '<br />';
$decrypted = $c->decrypt($encrypted);
echo 'Decrypted: ' . $decrypted . '<br />';
$vb = "MwBOAEoAOQBjAEgAcQAyAC8ASABzAD0ALABmAEUAOQBaAHYAVwBzAFUAYQB3AFYARwBGAHUANABLAGUAVgB3AFcAaABRAD0APQA=";
echo 'VB.NET Dec: ' . $c->decrypt($vb);
What I have included above in the PHP usage, is the Base64 string made with VB.NET that decodes PERFECTLY in VB.NET as the variable $vb.
This is driving me absolutely batty, as the code is correct, and functional -- in both cases -- so what am I missing and can you point out / fix the problem. I do not wish to use Rijndael, or explore other cipher methods, as this one is well established that works across multiple devices natively (iOS, Android, Windows, Linux, etc.).
Since no one was able to provide a fully functional BI-DIRECTIONAL solution, I have taken the liberty to provide one for the community on this article.
The problem, is that PHP does not conform to the standards by forcing the strings to be padded in order to match. Presently, there is no known way to reliably pass the IV if randomly generated between .NET and PHP (if you do discover how, or this changes, please feel free to revise this).
Following is the COMPLETE solution for encrypting data using Triple DES in a manner that is compatible with .NET and PHP which allows for bi-directional Triple DES encrypted communication. This method is also compatible with Java, Delphi, Objective-C, and many other languages, however such code is not going to be supplied here as that is not a solution to the posted question.
VB.NET Triple DES Class
Imports System
Imports System.Text
Imports System.IO
Imports System.Security.Cryptography
Public Class TripleDES
Private bPassword As Byte()
Private sPassword As String
Public Sub New(Optional ByVal Password As String = "password")
' On Class Begin
Me.Password = Password
End Sub
Public ReadOnly Property PasswordHash As String
Get
Dim UTF8 As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
Return UTF8.GetString(bPassword)
End Get
End Property
Public Property Password() As String
Get
Dim UTF8 As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
Return sPassword
End Get
Set(value As String)
Dim UTF8 As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
Dim HashProvider As MD5CryptoServiceProvider = New MD5CryptoServiceProvider()
bPassword = HashProvider.ComputeHash(UTF8.GetBytes(value))
sPassword = value
End Set
End Property
#Region "Encrypt"
' Encrypt using Password from Property Set (pre-hashed)
Public Function Encrypt(ByVal Message As String) As String
Dim Results() As Byte
Dim UTF8 As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
Using HashProvider As MD5CryptoServiceProvider = New MD5CryptoServiceProvider()
Dim TDESKey() As Byte = bPassword
Using TDESAlgorithm As TripleDESCryptoServiceProvider = New TripleDESCryptoServiceProvider() With {.Key = TDESKey, .Mode = CipherMode.ECB, .Padding = PaddingMode.PKCS7}
Dim DataToEncrypt() As Byte = UTF8.GetBytes(Message)
Try
Dim Encryptor As ICryptoTransform = TDESAlgorithm.CreateEncryptor
Results = Encryptor.TransformFinalBlock(DataToEncrypt, 0, DataToEncrypt.Length)
Finally
TDESAlgorithm.Clear()
HashProvider.Clear()
End Try
End Using
End Using
Return Convert.ToBase64String(Results)
End Function
' Encrypt using Password as byte array
Private Function Encrypt(ByVal Message As String, ByVal Password() As Byte) As String
Dim Results() As Byte
Dim UTF8 As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
Using HashProvider As MD5CryptoServiceProvider = New MD5CryptoServiceProvider()
Dim TDESKey() As Byte = HashProvider.ComputeHash(UTF8.GetBytes(UTF8.GetString(Password)))
Using TDESAlgorithm As TripleDESCryptoServiceProvider = New TripleDESCryptoServiceProvider() With {.Key = TDESKey, .Mode = CipherMode.ECB, .Padding = PaddingMode.PKCS7}
Dim DataToEncrypt() As Byte = UTF8.GetBytes(Message)
Try
Dim Encryptor As ICryptoTransform = TDESAlgorithm.CreateEncryptor
Results = Encryptor.TransformFinalBlock(DataToEncrypt, 0, DataToEncrypt.Length)
Finally
TDESAlgorithm.Clear()
HashProvider.Clear()
End Try
End Using
End Using
Return Convert.ToBase64String(Results)
End Function
' Encrypt using Password as string
Public Function Encrypt(ByVal Message As String, ByVal Password As String) As String
Dim Results() As Byte
Dim UTF8 As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
' Step 1. We hash the Passphrase using MD5
' We use the MD5 hash generator as the result is a 128 bit byte array
' which is a valid length for the Triple DES encoder we use below
Using HashProvider As MD5CryptoServiceProvider = New MD5CryptoServiceProvider()
Dim TDESKey() As Byte = HashProvider.ComputeHash(UTF8.GetBytes(Password))
' Step 2. Create a new TripleDESCryptoServiceProvider object
' Step 3. Setup the encoder
Using TDESAlgorithm As TripleDESCryptoServiceProvider = New TripleDESCryptoServiceProvider() With {.Key = TDESKey, .Mode = CipherMode.ECB, .Padding = PaddingMode.PKCS7}
' Step 4. Convert the input string to a byte[]
Dim DataToEncrypt() As Byte = UTF8.GetBytes(Message)
' Step 5. Attempt to encrypt the string
Try
Dim Encryptor As ICryptoTransform = TDESAlgorithm.CreateEncryptor
Results = Encryptor.TransformFinalBlock(DataToEncrypt, 0, DataToEncrypt.Length)
Finally
' Clear the Triple Des and Hashprovider services of any sensitive information
TDESAlgorithm.Clear()
HashProvider.Clear()
End Try
End Using
End Using
' Step 6. Return the encrypted string as a base64 encoded string
Return Convert.ToBase64String(Results)
End Function
#End Region
#Region "Decrypt"
' Decrypt using Password from Property (pre-hashed)
Public Function Decrypt(ByVal Message As String) As String
Dim Results() As Byte
Dim UTF8 As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
Using HashProvider As MD5CryptoServiceProvider = New MD5CryptoServiceProvider()
Dim TDESKey() As Byte = Me.bPassword
Using TDESAlgorithm As TripleDESCryptoServiceProvider = New TripleDESCryptoServiceProvider() With {.Key = TDESKey, .Mode = CipherMode.ECB, .Padding = PaddingMode.PKCS7}
Dim DataToDecrypt() As Byte = Convert.FromBase64String(Message)
Try
Dim Decryptor As ICryptoTransform = TDESAlgorithm.CreateDecryptor
Results = Decryptor.TransformFinalBlock(DataToDecrypt, 0, DataToDecrypt.Length)
Finally
TDESAlgorithm.Clear()
HashProvider.Clear()
End Try
End Using
End Using
Return UTF8.GetString(Results)
End Function
' Decrypt using Password as Byte array
Public Function Decrypt(ByVal Message As String, ByVal Password() As Byte) As String
Dim Results() As Byte
Dim UTF8 As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
Using HashProvider As MD5CryptoServiceProvider = New MD5CryptoServiceProvider()
Dim TDESKey() As Byte = HashProvider.ComputeHash(UTF8.GetBytes(UTF8.GetString(Password)))
Using TDESAlgorithm As TripleDESCryptoServiceProvider = New TripleDESCryptoServiceProvider() With {.Key = TDESKey, .Mode = CipherMode.ECB, .Padding = PaddingMode.PKCS7}
Dim DataToDecrypt() As Byte = Convert.FromBase64String(Message)
Try
Dim Decryptor As ICryptoTransform = TDESAlgorithm.CreateDecryptor
Results = Decryptor.TransformFinalBlock(DataToDecrypt, 0, DataToDecrypt.Length)
Finally
TDESAlgorithm.Clear()
HashProvider.Clear()
End Try
End Using
End Using
Return UTF8.GetString(Results)
End Function
' Decrypt using Password as string
Public Function Decrypt(ByVal Message As String, ByVal Password As String) As String
Dim Results() As Byte
Dim UTF8 As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
' Step 1. We hash the pass phrase using MD5
' We use the MD5 hash generator as the result is a 128-bit byte array
' which is a valid length for the Triple DES encoder we use below
Using HashProvider As MD5CryptoServiceProvider = New MD5CryptoServiceProvider()
Dim TDESKey() As Byte = HashProvider.ComputeHash(UTF8.GetBytes(Password))
' Step 2. Create a new TripleDESCryptoServiceProvider object
' Step 3. Setup the decoder
Using TDESAlgorithm As TripleDESCryptoServiceProvider = New TripleDESCryptoServiceProvider() With {.Key = TDESKey, .Mode = CipherMode.ECB, .Padding = PaddingMode.PKCS7}
' Step 4. Convert the input string to a byte[]
Dim DataToDecrypt() As Byte = Convert.FromBase64String(Message)
' Step 5. Attempt to decrypt the string
Try
Dim Decryptor As ICryptoTransform = TDESAlgorithm.CreateDecryptor
Results = Decryptor.TransformFinalBlock(DataToDecrypt, 0, DataToDecrypt.Length)
Finally
' Clear the Triple Des and Hash provider services of any sensitive information
TDESAlgorithm.Clear()
HashProvider.Clear()
End Try
End Using
End Using
' Step 6. Return the decrypted string in UTF8 format
Return UTF8.GetString(Results)
End Function
#End Region
End Class
VB.NET Triple DES Class Usage
Dim tdes As New TripleDES("12345")
Dim vbEncrypted = tdes.Encrypt("Encrypted using VB.NET")
Dim phpEncrypted = "5Ittyr0+jiI7QQmPrvSVnMc9MEWQCjAN"
Debug.Print("PHP Encrypted: " & phpEncrypted)
Debug.Print("VB Encrypted: " & vbEncrypted)
Debug.Print("PHP Encrypted (decrypted result): " & tdes.Decrypt(phpEncrypted))
Debug.Print("VB Encrypted (decrypted result): " & tdes.Decrypt(vbEncrypted))
PHP Triple DES Class
class TripleDES {
private $bPassword;
private $sPassword;
function __construct($Password) {
$this->bPassword = md5(utf8_encode($Password),TRUE);
$this->bPassword .= substr($this->bPassword,0,8);
$this->sPassword - $Password;
}
function Password($Password = "") {
if($Password == "") {
return $this->sPassword;
} else {
$this->bPassword = md5(utf8_encode($Password),TRUE);
$this->bPassword .= substr($this->bPassword,0,8);
$this->sPassword - $Password;
}
}
function PasswordHash() {
return $this->bPassword;
}
function Encrypt($Message, $Password = "") {
if($Password <> "") { $this->Password($Password); }
$size=mcrypt_get_block_size('tripledes','ecb');
$padding=$size-((strlen($Message)) % $size);
$Message .= str_repeat(chr($padding),$padding);
$encrypt = mcrypt_encrypt('tripledes',$this->bPassword,$Message,'ecb');
return base64_encode($encrypt);
}
function Decrypt($message, $Password = "") {
if($Password <> "") { $this->Password($Password); }
return trim(mcrypt_decrypt('tripledes', $this->bPassword, base64_decode($message), 'ecb'), ord(2));
}
}
PHP Triple DES Class Usage
$tdes = new TripleDES("12345");
$phpEncrypted = $tdes->encrypt("Encrypted using PHP");
$vbEncrypted = "5Ittyr0+jiI7QQmPrvSVnP3s2CeoTJmF"; // Encrypted using VB.NET
echo "PHP Encrypted: " . $phpEncrypted . '<br />';
echo "VB Encrypted: " . $vbEncrypted . '<br />';
echo "PHP Encrypted (decrypted result): " . $tdes->Decrypt($phpEncrypted) . '<br />';
echo "VB Encrypted (decrypted result): " . $tdes->Decrypt($vbEncrypted) . '<br />';
I did what I could to make both classes usability level identical as the languages would allow naturally. Since PHP does not allow overloading functions, I had to use the password as an optional parameter, which is a string value. The VB.NET solution has an additional override that allows you to pass the byte value of the password string on encrypt/decrypt functions. The example code provided to show the usage for each, shows the most simplistic form of instantiating the object which both classes allow for setting the password on object creation.
For anyone else out there that was bashing their brains trying to find a WORKING bi-directional solution for Triple DES (and did not want to be forced into the box that everyone seems to be pointing to -- Rijndael), then this solution is for you, and you can stop banging your head against the wall.
Added a C# translation of the VB.NET TripleDES class
C# Class ( Added [2017-01-11] )
using System;
using System.Security.Cryptography;
public class TripleDES {
private byte[] bPassword;
private string sPassword;
public TripleDES( string Password = "password" ) {
// On Class Begin
this.Password = Password;
}
public string PasswordHash {
get {
System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
return UTF8.GetString( bPassword );
}
}
public string Password {
get {
System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
return sPassword;
}
set {
System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider();
bPassword = HashProvider.ComputeHash( UTF8.GetBytes( value ) );
sPassword = value;
}
}
#region "Encrypt"
// Encrypt using Password from Property Set (pre-hashed)
public string Encrypt( string Message ) {
byte[] Results = null;
System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
using ( MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider() ) {
byte[] TDESKey = bPassword;
using ( TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider { Key = TDESKey, Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 } ) {
byte[] DataToEncrypt = UTF8.GetBytes( Message );
try {
ICryptoTransform Encryptor = TDESAlgorithm.CreateEncryptor();
Results = Encryptor.TransformFinalBlock( DataToEncrypt, 0, DataToEncrypt.Length );
} finally {
TDESAlgorithm.Clear();
HashProvider.Clear();
}
}
}
return Convert.ToBase64String( Results );
}
// Encrypt using Password as byte array
private string Encrypt( string Message, byte[] Password ) {
byte[] Results = null;
System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
using ( MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider() ) {
byte[] TDESKey = HashProvider.ComputeHash( UTF8.GetBytes( UTF8.GetString( Password ) ) );
using ( TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider { Key = TDESKey, Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 } ) {
byte[] DataToEncrypt = UTF8.GetBytes( Message );
try {
ICryptoTransform Encryptor = TDESAlgorithm.CreateEncryptor();
Results = Encryptor.TransformFinalBlock( DataToEncrypt, 0, DataToEncrypt.Length );
} finally {
TDESAlgorithm.Clear();
HashProvider.Clear();
}
}
}
return Convert.ToBase64String( Results );
}
// Encrypt using Password as string
public string Encrypt( string Message, string Password ) {
byte[] Results = null;
System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
// Step 1. We hash the Passphrase using MD5
// We use the MD5 hash generator as the result is a 128 bit byte array
// which is a valid length for the Triple DES encoder we use below
using ( MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider() ) {
byte[] TDESKey = HashProvider.ComputeHash( UTF8.GetBytes( Password ) );
// Step 2. Create a new TripleDESCryptoServiceProvider object
// Step 3. Setup the encoder
using ( TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider { Key = TDESKey, Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 } ) {
// Step 4. Convert the input string to a byte[]
byte[] DataToEncrypt = UTF8.GetBytes( Message );
// Step 5. Attempt to encrypt the string
try {
ICryptoTransform Encryptor = TDESAlgorithm.CreateEncryptor();
Results = Encryptor.TransformFinalBlock( DataToEncrypt, 0, DataToEncrypt.Length );
} finally {
// Clear the Triple Des and Hashprovider services of any sensitive information
TDESAlgorithm.Clear();
HashProvider.Clear();
}
}
}
// Step 6. Return the encrypted string as a base64 encoded string
return Convert.ToBase64String( Results );
}
#endregion
#region "Decrypt"
// Decrypt using Password from Property (pre-hashed)
public string Decrypt( string Message ) {
byte[] Results = null;
System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
using ( MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider() ) {
byte[] TDESKey = this.bPassword;
using ( TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider { Key = TDESKey, Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 } ) {
byte[] DataToDecrypt = Convert.FromBase64String( Message );
try {
ICryptoTransform Decryptor = TDESAlgorithm.CreateDecryptor();
Results = Decryptor.TransformFinalBlock( DataToDecrypt, 0, DataToDecrypt.Length );
} finally {
TDESAlgorithm.Clear();
HashProvider.Clear();
}
}
}
return UTF8.GetString( Results );
}
// Decrypt using Password as Byte array
public string Decrypt( string Message, byte[] Password ) {
byte[] Results = null;
System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
using ( MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider() ) {
byte[] TDESKey = HashProvider.ComputeHash( UTF8.GetBytes( UTF8.GetString( Password ) ) );
using ( TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider { Key = TDESKey, Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 } ) {
byte[] DataToDecrypt = Convert.FromBase64String( Message );
try {
ICryptoTransform Decryptor = TDESAlgorithm.CreateDecryptor();
Results = Decryptor.TransformFinalBlock( DataToDecrypt, 0, DataToDecrypt.Length );
} finally {
TDESAlgorithm.Clear();
HashProvider.Clear();
}
}
}
return UTF8.GetString( Results );
}
// Decrypt using Password as string
public string Decrypt( string Message, string Password ) {
byte[] Results = null;
System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
// Step 1. We hash the pass phrase using MD5
// We use the MD5 hash generator as the result is a 128-bit byte array
// which is a valid length for the Triple DES encoder we use below
using ( MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider() ) {
byte[] TDESKey = HashProvider.ComputeHash( UTF8.GetBytes( Password ) );
// Step 2. Create a new TripleDESCryptoServiceProvider object
// Step 3. Setup the decoder
using ( TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider { Key = TDESKey, Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 } ) {
// Step 4. Convert the input string to a byte[]
byte[] DataToDecrypt = Convert.FromBase64String( Message );
// Step 5. Attempt to decrypt the string
try {
ICryptoTransform Decryptor = TDESAlgorithm.CreateDecryptor();
Results = Decryptor.TransformFinalBlock( DataToDecrypt, 0, DataToDecrypt.Length );
} finally {
// Clear the Triple Des and Hash provider services of any sensitive information
TDESAlgorithm.Clear();
HashProvider.Clear();
}
}
}
// Step 6. Return the decrypted string in UTF8 format
return UTF8.GetString( Results );
}
#endregion
}
For PHP 7+ mccrypt wont work, so here the solution for encrypt and decrypt using the library phpseclib:
$des = new \phpseclib\Crypt\TripleDES(\phpseclib\Crypt\TripleDES::MODE_ECB);
$key = YOURKEY;
$p = md5(utf8_encode($key),TRUE);
$p .= substr($p,0,8);
$p - $key;
$des->setKey($p);
$phpEncrypted = $des->encrypt("Encrypted using PHP");
$vbEncrypted = "5Ittyr0+jiI7QQmPrvSVnP3s2CeoTJmF"; // Encrypted using VB.NET
echo "PHP Encrypted: " . $phpEncrypted . '<br />';
echo "VB Encrypted: " . $vbEncrypted . '<br />';
echo "PHP Encrypted (decrypted result): " . $des->decrypt(base64_decode($phpEncrypted)) . '<br />';
echo "VB Encrypted (decrypted result): " . $des->decrypt(base64_decode($vbEncrypted)) . '<br />';
I was trying to compress a String in php using the following code.
<?php
$compressed = gzcompress('Compress me', 9);
echo $uncompressed;
?>
The compressed string is "xÚsÎÏ-(J-.VÈM½?".
But when tried to decompress this in java using the following function
public static String unzipString(String zippedText) {
String unzipped = null;
try {
byte[] zbytes = zippedText.getBytes("ISO-8859-1");
// Add extra byte to array when Inflater is set to true
byte[] input = new byte[zbytes.length + 1];
System.arraycopy(zbytes, 0, input, 0, zbytes.length);
input[zbytes.length] = 0;
ByteArrayInputStream bin = new ByteArrayInputStream(input);
InflaterInputStream in = new InflaterInputStream(bin);
ByteArrayOutputStream bout = new ByteArrayOutputStream(512);
int b;
while ((b = in.read()) != -1) {
bout.write(b);
}
bout.close();
unzipped = bout.toString();
} catch (IOException io) {
printIoError(io);
}
return unzipped;
}
I was getting null string..Please correct me if i did something wrong this code.
I want to upload an Image i selected with the PhotoChooserTask.
The Selection itself works fine and i can open the Image.
I also already decoded it to Base64 (Works).
Since I can't find any working example on how to work with httpwebrequest on windowsphone I tried it the following way.
private void photoChooserTask_Completed(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
//Code to display the photo on the page in an image control named myImage.
System.Windows.Media.Imaging.BitmapImage bmp = new System.Windows.Media.Imaging.BitmapImage();
bmp.SetSource(e.ChosenPhoto);
MyImage.Source = bmp;
String str = BitmapToByte(MyImage);
String url = "http://klopper.puppis.uberspace.de/php/app/image.php?image="+ str;
LoadSiteContent(url);
}
}
The rest of the code is working fine.
I get: System.IO.FileNotFoundException
If I change the str to "test" it's working.
Is the problem, that the string is too long?
private void task_Completed(object sender, PhotoResult e)
{
if (e.TaskResult != TaskResult.OK)
return;
const int BLOCK_SIZE = 4096;
Uri uri = new Uri("http://localhost:4223/File/Upload", UriKind.Absolute);
WebClient wc = new WebClient();
wc.AllowReadStreamBuffering = true;
wc.AllowWriteStreamBuffering = true;
// what to do when write stream is open
wc.OpenWriteCompleted += (s, args) =>
{
using (BinaryReader br = new BinaryReader(e.ChosenPhoto))
{
using (BinaryWriter bw = new BinaryWriter(args.Result))
{
long bCount = 0;
long fileSize = e.ChosenPhoto.Length;
byte[] bytes = new byte[BLOCK_SIZE];
do
{
bytes = br.ReadBytes(BLOCK_SIZE);
bCount += bytes.Length;
bw.Write(bytes);
} while (bCount < fileSize);
}
}
};
// what to do when writing is complete
wc.WriteStreamClosed += (s, args) =>
{
MessageBox.Show("Send Complete");
};
// Write to the WebClient
wc.OpenWriteAsync(uri, "POST");
}
Reference
to post image file in windows phone 7 application