C# to PHP AES Decryption

Hi i have c# sample of code but i can't turn it to php. İ tried to rewrite code but i can't do it. In my project other server encrypts data with c# and i have to decrypt it using PHP.

I have password and salt value.

Here is C# code includes encrypt and decrypt function.

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Security.Cryptography; using System.IO; namespace EncryptionSample { public static class CipherUtility { public static string Encrypt(string plainText, string password, string salt) { if (plainText == null || plainText.Length <= 0) { throw new ArgumentNullException("plainText"); } if (String.IsNullOrEmpty(password)) { throw new ArgumentNullException("password"); } if (String.IsNullOrEmpty(salt)) { throw new ArgumentNullException("salt"); } byte[] encrypted; byte[] saltBytes = Encoding.UTF8.GetBytes(salt); using (Rfc2898DeriveBytes derivedBytes = new Rfc2898DeriveBytes(password, saltBytes)) { using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider()) { aesAlg.Key = derivedBytes.GetBytes(32); aesAlg.IV = derivedBytes.GetBytes(16); ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV); using (MemoryStream msEncrypt = new MemoryStream()) { using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)) { using (StreamWriter swEncrypt = new StreamWriter(csEncrypt)) { swEncrypt.Write(plainText); } encrypted = msEncrypt.ToArray(); } } } } return Convert.ToBase64String(encrypted); } public static string Decrypt(string cipherValue, string password, string salt) { byte[] cipherText = Convert.FromBase64String(cipherValue); if (cipherText == null || cipherText.Length <= 0) { throw new ArgumentNullException("cipherValue"); } if (String.IsNullOrWhiteSpace(password)) { throw new ArgumentNullException("password"); } if (String.IsNullOrWhiteSpace(password)) { throw new ArgumentNullException("salt"); } string plaintext = null; byte[] saltBytes = Encoding.UTF8.GetBytes(salt); using (Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(password, saltBytes)) { using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider()) { aesAlg.Key = deriveBytes.GetBytes(32); aesAlg.IV = deriveBytes.GetBytes(16); ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV); using (MemoryStream msDecrypt = new MemoryStream(cipherText)) { using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)) { using (StreamReader srDecrypt = new StreamReader(csDecrypt)) { plaintext = srDecrypt.ReadToEnd(); } } } } } return plaintext; } } } 

My php code is here but i think i am totally wrong.

function decrypt($encrypted, $password, $salt) { // Build a 256-bit $key which is a SHA256 hash of $salt and $password. $key = hash('SHA256', $salt . $password, true); // Retrieve $iv which is the first 22 characters plus ==, base64_decoded. $iv = base64_decode(substr($encrypted, 0, 22) . '=='); // print_r($iv);die(); // Remove $iv from $encrypted. $encrypted = substr($encrypted, 22); //print_r($encrypted);die(); // Decrypt the data. rtrim won't corrupt the data because the last 32 characters are the md5 hash; thus any \0 character has to be padding. $decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, base64_decode($encrypted), MCRYPT_MODE_CBC, $iv), "\0\4"); // Retrieve $hash which is the last 32 characters of $decrypted. $hash = substr($decrypted, -32); // Remove the last 32 characters from $decrypted. $decrypted = substr($decrypted, 0, -32); // Integrity check. If this fails, either the data is corrupted, or the password/salt was incorrect. if (md5($decrypted) != $hash) return false; return $decrypted; }