如何在 c# 中实现 PHP 的 openssl_encrypt 方法？

Question

如标题所示，我需要在C#代码中实现php的openssl_encrypt方法，因为我需要在php页面上调用服务，但我们使用C#。php代码是这样的：

$textToEncrypt = "test";                                        

$algo = "AES256";
$iv   = openssl_random_pseudo_bytes(openssl_cipher_iv_length($algo));
$key  = "1234567890987654"; //Not this key, but just same length
$parametri_enc  = openssl_encrypt($textToEncrypt , $algo, $key, 0, $iv);
$iv   = bin2hex($iv); 

我尝试了很多东西，实际上我的代码是：

string textToEncrypt = "test";
string secretCode = "1234567890987654"
// Create sha256 hash
SHA256 mySHA256 = SHA256Managed.Create();
byte[] key = mySHA256.ComputeHash(Encoding.ASCII.GetBytes(secretCode));
// Create secret IV
byte[] iv = new byte[16];
RandomNumberGenerator generator = RandomNumberGenerator.Create();
generator.GetBytes(iv);
string encryptedText = EncryptString(textToEncrypt, key, iv);
// And I try to port also the bin2hex method
var sb = new StringBuilder();
foreach (byte b in iv)
{
sb.AppendFormat("{0:x2}", b);
}
var tokenBytesHex = sb.ToString();

EncryptString方法是

public static string EncryptString(string plainText, byte[] key, byte[] iv)
{
//Instantiate a new Aes object to perform string symmetric encryption
Aes encryptor = Aes.Create();
encryptor.Mode = CipherMode.CBC;
// Set key and IV
byte[] aesKey = new byte[32];
Array.Copy(key, 0, aesKey, 0, 32);
encryptor.Key = aesKey;
encryptor.IV = iv;
// Instantiate a new MemoryStream object to contain the encrypted bytes
MemoryStream memoryStream = new MemoryStream();
// Instantiate a new encryptor from our Aes object
ICryptoTransform aesEncryptor = encryptor.CreateEncryptor();
// Instantiate a new CryptoStream object to process the data and write it to the 
// memory stream
CryptoStream cryptoStream = new CryptoStream(memoryStream, aesEncryptor, CryptoStreamMode.Write);
// Convert the plainText string into a byte array
byte[] plainBytes = Encoding.ASCII.GetBytes(plainText);
// Encrypt the input plaintext string
cryptoStream.Write(plainBytes, 0, plainBytes.Length);
// Complete the encryption process
cryptoStream.FlushFinalBlock();
// Convert the encrypted data from a MemoryStream to a byte array
byte[] cipherBytes = memoryStream.ToArray();
// Close both the MemoryStream and the CryptoStream
memoryStream.Close();
cryptoStream.Close();
// Convert the encrypted byte array to a base64 encoded string
string cipherText = Convert.ToBase64String(cipherBytes, 0, cipherBytes.Length);
// Return the encrypted data as a string
return cipherText;
}

我尝试了很多关于这个移植的变体(我在网上找到的(，但没有结果。如果我在代码中使用了正确的加密字符串，我可以调用该服务，所以它可以工作。我只需要正确加密那个字符串，但到目前为止，我已经失败了

Answer 1

好的，我解决了自己的问题。我会分享它，这样如果有人有同样的问题，这可能会奏效。基本上，我在这里看到了一个解密c#代码，所以我用这种方式更新我的代码首先，我以字符串格式而不是byte[]传递secretCode

所以我用这种方式更改了我的方法签名：

public static string EncryptString(string plainText, string secretcode, byte[] iv)

在内部，我改变了操作secretCode(php等效方法中的密码短语(的方式

// Set key and IV
var aesKey = Encoding.ASCII.GetBytes(secretcode);
//pad key out to 32 bytes (256bits) if its too short
if (aesKey.Length < 32)
{
var paddedkey = new byte[32];
Buffer.BlockCopy(aesKey, 0, paddedkey, 0, aesKey.Length);
aesKey = paddedkey;
}

所以它成功了！没有其他的变化，只是这两个小的变化，从我之前的后

更新的方法

public static string EncryptString(string plainText, string secretcode, byte[] iv)
{
// Instantiate a new Aes object to perform string symmetric encryption
Aes encryptor = Aes.Create();
encryptor.Mode = CipherMode.CBC;
// Set key and IV
var aesKey = Encoding.ASCII.GetBytes(secretcode);
//pad key out to 32 bytes (256bits) if its too short
if (aesKey.Length < 32)
{
var paddedkey = new byte[32];
Buffer.BlockCopy(aesKey, 0, paddedkey, 0, aesKey.Length);
aesKey = paddedkey;
}
encryptor.Key = aesKey;
encryptor.IV = iv;
// Instantiate a new MemoryStream object to contain the encrypted bytes
MemoryStream memoryStream = new MemoryStream();
// Instantiate a new encryptor from our Aes object
ICryptoTransform aesEncryptor = encryptor.CreateEncryptor();
// Instantiate a new CryptoStream object to process the data and write it to the 
// memory stream
CryptoStream cryptoStream = new CryptoStream(memoryStream, aesEncryptor, CryptoStreamMode.Write);
// Convert the plainText string into a byte array
byte[] plainBytes = Encoding.ASCII.GetBytes(plainText);
// Encrypt the input plaintext string
cryptoStream.Write(plainBytes, 0, plainBytes.Length);
// Complete the encryption process
cryptoStream.FlushFinalBlock();
// Convert the encrypted data from a MemoryStream to a byte array
byte[] cipherBytes = memoryStream.ToArray();
// Close both the MemoryStream and the CryptoStream
memoryStream.Close();
cryptoStream.Close();
// Convert the encrypted byte array to a base64 encoded string
string cipherText = Convert.ToBase64String(cipherBytes, 0, cipherBytes.Length);
// Return the encrypted data as a string
return cipherText;
}