使用MCRYPT_RIJNDAEL_256的PHP加密库的相应Powershell模块是什么？

Question

PHP代码：

mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $to_encrypt, MCRYPT_MODE_ECB);

我需要相应的powershell代码，它可以产生相同的结果。

我已经尝试过ConvertTo-SecureString / ConvertFrom-SecureString。

Powershell代码（未生成正确的加密）：

$api_code = "214e3854a1ec5433ae986d1e5d40c436"
$params = @{"controller" = $controller; "action"= $action;  "all"= $TRUE; }
[Byte[]] $key = $api_code[0..$api_code.length]
$param_object = $params | ConvertTo-SecureString -AsPlainText -Force
$param_aes = $param_object | ConvertFrom-SecureString -key $key

加密的字符串不同。有没有我缺少的参数？还是有另一个模块吗？

Answer 1

正如评论中所指出的那样，SecureString与Rijndael规范无关，而MCRYPT_RIJNDAEL_256 不与AES256（引用Rijndael-128）相同使用256位密钥）

因此，为了解决您的问题，我们只需要一个函数来使用块大小为256的Rijndael在ECB密码模式下加密明文。

为此，明显的选择是RijndaelManaged类。幸运的是，MSDN文档提供了一个基本但功能齐全的示例，说明如何使用RijndaelManaged类和CryptoStream来加密和解密字符串 - 我们需要做的就是在PowerShell中重写它并更改块大小和密码模式：

function Encrypt-Rijndael256ECB {
    param(
        [byte[]]$Key,
        [string]$Plaintext
    )

    $RijndaelProvider = New-Object -TypeName System.Security.Cryptography.RijndaelManaged

    # Set block size to 256 to imitate MCRYPT_RIJNDAEL_256
    $RijndaelProvider.BlockSize = 256
    # Make sure we use ECB mode, or the generated IV will fuck up the first block upon decryption
    $RijndaelProvider.Mode      = [System.Security.Cryptography.CipherMode]::ECB
    $RijndaelProvider.Key       = $key

    # This object will take care of the actual cryptographic transformation
    $Encryptor = $RijndaelProvider.CreateEncryptor()

    # Set up a memorystream that we can write encrypted data back to
    $EncMemoryStream = New-Object System.IO.MemoryStream
    $EncCryptoStream = New-Object System.Security.Cryptography.CryptoStream -ArgumentList $EncMemoryStream,$Encryptor,"Write"
    $EncStreamWriter = New-Object System.IO.StreamWriter -ArgumentList $EncCryptoStream

    # When we write data back to the CryptoStream, it'll get encrypted and written back to the MemoryStream
    $EncStreamWriter.Write($Plaintext)

    # Close the writer
    $EncStreamWriter.Close()
    # Close the CryptoStream (pads and flushes any data still left in the buffer)
    $EncCryptoStream.Close()
    $EncMemoryStream.Close()

    # Read the encrypted message from the memory stream
    $Cipher     = $EncMemoryStream.ToArray() -as [byte[]]
    $CipherText = [convert]::ToBase64String($Cipher)

    # return base64 encoded encrypted string
    return $CipherText
}

解密过程几乎相同，虽然这次我们需要将其反转并通过MemoryStream中的CryptoStream读取密文：

function Decrypt-Rijndael256ECB {
    param(
        [byte[]]$Key,
        [string]$CipherText
    )

    $RijndaelProvider = New-Object -TypeName System.Security.Cryptography.RijndaelManaged

    $RijndaelProvider.BlockSize = 256
    $RijndaelProvider.Mode      = [System.Security.Cryptography.CipherMode]::ECB
    $RijndaelProvider.Key       = $key

    $Decryptor = $RijndaelProvider.CreateDecryptor()

    # Reverse process: Base64Decode first, then populate memory stream with ciphertext and lastly read decrypted data through cryptostream
    $Cipher = [convert]::FromBase64String($CipherText) -as [byte[]]

    $DecMemoryStream = New-Object System.IO.MemoryStream -ArgumentList @(,$Cipher)
    $DecCryptoStream = New-Object System.Security.Cryptography.CryptoStream -ArgumentList $DecMemoryStream,$Decryptor,$([System.Security.Cryptography.CryptoStreamMode]::Read)
    $DecStreamWriter = New-Object System.IO.StreamReader -ArgumentList $DecCryptoStream

    $NewPlainText = $DecStreamWriter.ReadToEnd()

    $DecStreamWriter.Close()
    $DecCryptoStream.Close()
    $DecMemoryStream.Close()

    return $NewPlainText
}