使用vb.net aes/cbc加密字符串，需要使用JavaScript CryptoJS解密

Question

Dim encryptedComplianceValue = encrypt2(complianceValue, "Password", "Salt Value", "SHA1", 2, "@1B2c3D4e5F6g7H8", 256)

加密方法

Public Function encrypt2(ByVal plainText As String, ByVal passPhrase As String, ByVal saltValue As String, ByVal hashAlgorithm As String, ByVal passwordIterations As Integer, ByVal initVector As String, ByVal keySize As Integer) As String

    Dim initVectorBytes As Byte()
    initVectorBytes = Encoding.ASCII.GetBytes(initVector)

    Dim saltValueBytes As Byte()
    saltValueBytes = Encoding.ASCII.GetBytes(saltValue)

    Dim plainTextBytes As Byte()
    plainTextBytes = Encoding.UTF8.GetBytes(plainText)

    Dim password As Rfc2898DeriveBytes
    password = New Rfc2898DeriveBytes(passPhrase, saltValueBytes, passwordIterations)

    Dim keyBytes As Byte()
    keyBytes = password.GetBytes(keySize / 8)

    Dim symmetricKey As RijndaelManaged
    symmetricKey = New RijndaelManaged()

    symmetricKey.Mode = CipherMode.CBC

    Dim encryptor As ICryptoTransform
    encryptor = symmetricKey.CreateEncryptor(keyBytes, initVectorBytes)

    Dim memoryStream As MemoryStream
    memoryStream = New MemoryStream()

    Dim cryptoStream As CryptoStream
    cryptoStream = New CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write)
    cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length)
    cryptoStream.FlushFinalBlock()

    Dim cipherTextBytes As Byte()
    cipherTextBytes = memoryStream.ToArray()

    memoryStream.Close()
    cryptoStream.Close()

    Dim cipherText As String
    cipherText = Convert.ToBase64String(cipherTextBytes)

    Return cipherText
End Function

JavaScript

function decryptMsg256() 
{
    var keySize = 256;
    var iterations = 2;
    var algorithm = 'AES-256-CBC';

    // the password that user provides
    var userPass = "Password"; 
    console.log("user pass : " + userPass);

    // get the encrypted msg 
    var encMsg64 = "v6shkblimfQMOoa8VxICjQ==";
    var encMsg = CryptoJS.enc.Base64.parse(encMsg64);



    //var salt =CryptoJS.enc.Utf8.parse("Mon,07-Mar-2016 18:50:46 GMT");
    var salt = "Salt Value";
    console.log('salt:  '+ salt);
    var saltbytes = [];

    for (var i = 0; i <salt.length; ++i) {
        saltbytes .push(salt.charCodeAt(i));
    }
    console.log('saltbytes:  '+ saltbytes );

    //var iv =CryptoJS.enc.Utf8.parse("@1B2c3D4e5F6g7H8");
    var iv = "@1B2c3D4e5F6g7H8";
    console.log('IV:  '+ iv);
    var ivbytes = [];

    for (var i = 0; i <iv.length; ++i) {
        ivbytes.push(iv.charCodeAt(i));
    }
    console.log('ivbytes:  '+ ivbytes );

    //var saltBuffer = new Buffer(salt);
    //var passwordBuffer = new Buffer(userPass);

    var key = CryptoJS.PBKDF2(userPass, saltbytes,{keyBytes: 32,      iterations: 2 });
    //var key = CryptoJS.PBKDF2(userPass, salt, iterations, keySize/8);
    //var decipher = CryptoJS.createDecipheriv(algorithm, key, iv);

    console.log( 'key: '+ key);
    var keybytes = [];

    for (var i = 0; i <key.length; ++i) {
        keybytes.push(key.charCodeAt(i));
    }
    console.log('keybytes:  '+ keybytes);


    //var plainText="Hello, World!";

    //console.log('Plain Text  '+ plainText );

    //var encMsg = CryptoJS.AES.encrypt(plainText, key,  {
         //               iv:iv,
          //            mode: CryptoJS.mode.CBC,
           //             padding: CryptoJS.pad.Pkcs7
    //      });


    //console.log('Encrypted Message  '+ encMsg );




    var decText = '';

    var decMsg = CryptoJS.AES.decrypt( encMsg, key, {
                    iv:iv,
                    mode: CryptoJS.mode.CBC,
                    //padding: CryptoJS.pad.Pkcs7
                    } );
    //console.log( "decryptedData = " + decMsg );

    // convert to UTF8 string
    decText = decMsg.toString( CryptoJS.enc.Utf8);
    console.log( "decryptedText = " + decText );

}

Answer 1

您有多个问题：

>

您的IV是一个简单的ASCII字符串，因此您可以使用

var iv = CryptoJS.enc.Utf8.parse("@1B2c3D4e5F6g7H8");

不要将您的自定义“二进制”格式与SaltBytes.Push(Salt.CharCodeat(i))；或类似格式一起使用。您需要使用CryptoJS的本机格式，该格式可通过以下方式获得

CryptoJS.enc.<Encoder>.parse(string)

var key = CryptoJS.PBKDF2(userPass, salt, {keySize: 256/32,      iterations: 2 });

var decMsg = CryptoJS.AES.decrypt({
    ciphertext: encMsg
}, key, {
    iv: iv
});