slowAES不使用CBC / PKCS7 - 替代方案?

时间:2010-11-23 12:24:50

标签: javascript encryption aes

基本上,如何在CBC / PKCS7中加密javascript,以便在php或.NET中解密?

我尝试过slowAES,但加密的输出文本似乎不正确。

我比较了slowAES和.NET加密,并给两个字节数组输入(key,iv和message),slowAES返回不同的字节数组输出。

我还将结果与.NET和php的mcrypt进行了比较,它们产生了相同的输出。

我已经尝试过此修复link text,但它没有用。

所以,假设是一个slowAES问题,是否有一个可行的替代方案,或者有人知道如何修复它吗?

哦,如果我只使用slowAES:x

,我可以加密和解密

更新,举例:

javascript加密:

var bytesToEncrypt = cryptoHelpers.convertStringToByteArray("2|2010-11-23+10:04:53|0");
// [50, 124, 50, 48, 49, 48, 45, 49, 49, 45, 50, 51, 43, 49, 48, 58, 48, 52, 58, 53, 51, 124, 48]

var key = cryptoHelpers.base64.decode("de1310982b646af063e7314e8ddd4787");
//[117, 237, 119, 215, 79, 124, 217, 190, 184, 233, 167, 244, 235, 119, 187, 223, 94, 30, 241, 215, 93, 227, 191, 59]

var iv = cryptoHelpers.base64.decode("v/VCTAlV5+kexBFN16WY5A==");
//[191, 245, 66, 76, 9, 85, 231, 233, 30, 196, 17, 77, 215, 165, 152, 228]

var result = slowAES.encrypt(bytesToEncrypt, 
slowAES.modeOfOperation.CBC,
key,
slowAES.aes.keySize.SIZE_128,
iv);

return result['cipher'];
//[114, 176, 211, 189, 47, 133, 36, 115, 173, 19, 122, 45, 30, 212, 189, 54, 149, 167, 92, 127, 198, 13, 121, 102, 70, 172, 119, 194, 249, 98, 107, 236]

.NET / Silverlight 加密:

    class AES
    {
        AesManaged aes;

        public AES(string base64key, string base64IV) 
            : this(Convert.FromBase64String(base64key),Convert.FromBase64String(base64IV)) 
        {}

        public AES(byte[] key, byte[] iv)
        {
            // CBC/128/PKCS7
            aes = new AesManaged();
            aes.Key = key;
            aes.IV = iv;
        }
        public string Encrypt(string strInptData)
        {
            byte[] utfdata = UTF8Encoding.UTF8.GetBytes(strInptData);

            PrintByteArray(utfdata);
// [50, 124, 50, 48, 49, 48, 45, 49, 49, 45, 50, 51, 43, 49, 48, 58, 48, 52, 58, 53, 51, 124, 48]

            PrintByteArray(aes.Key);
// [117, 237, 119, 215, 79, 124, 217, 190, 184, 233, 167, 244, 235, 119, 187, 223, 94, 30, 241, 215, 93, 227, 191, 59]

            PrintByteArray(aes.IV);
// [191, 245, 66, 76, 9, 85, 231, 233, 30, 196, 17, 77, 215, 165, 152, 228]

            // Create a decrytor to perform the stream transform.
            ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV);

            // Create the streams used for encryption.
            MemoryStream msEncrypt = new MemoryStream();
            CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);

            csEncrypt.Write(utfdata, 0, utfdata.Length);
            csEncrypt.Flush();
            csEncrypt.Close();

            // Showing our encrypted content
            byte[] encryptBytes = msEncrypt.ToArray();

            PrintByteArray(encryptBytes);
// [89, 116, 38, 217, 71, 199, 73, 174, 55, 139, 158, 231, 22, 238, 252, 245, 147, 206, 176, 157, 1, 141, 88, 178, 160, 112, 135, 182, 13, 200, 53, 121]

            return HttpUtility.UrlEncode(Convert.ToBase64String(encryptBytes));
        }
    }

string base64key = "de1310982b646af063e7314e8ddd4787";
string base64iv = "v/VCTAlV5+kexBFN16WY5A==";

aes = new AES(base64key, base64iv);

auth_token = aes.Encrypt("2|2010-11-23+10:04:53|0");

正如你所看到的,.NET和javascript产生不同的字节数组,所以甚至不是base64 / url-encode / decode的东西..

1 个答案:

答案 0 :(得分:2)

您的密钥长度为24个字节(192位),但您声称它只有16个字节(128位)长:

var result = slowAES.encrypt(bytesToEncrypt, 
slowAES.modeOfOperation.CBC,
key,
slowAES.aes.keySize.SIZE_128, // <- Here is your problem
iv);

SIZE_128更改为SIZE_192,它应该有效。我编写了一个Java程序,它发出了JavaScript示例生成的相同输出。