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Encrypted connection string can not be decrypted


Encrypted connection string can not be decrypted

By : Yelly
Date : November 22 2020, 02:59 PM
I hope this helps . One instance where this error message is returned is when an RSA key with 2048 bits is used to encrypt the web.config, and an attempt is made to decrypt with a 1024 bit RSA key. Double-check to make sure you have the same key on both machines (all you need is the public portion of the key on the encrypting machine).
By default, the NetFrameworkConfigurationKey is different on each machine (and non-exportable?). To deploy an encrypted web.config from another machine, you need to export the public key from the destination machine and use it to encrypt (or follow all the tutorials and create your own key and put it on both machines...).
code :


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Reverse Proxy: How to relay (encrypted) SSL traffic to a (decrypted) TCP connection?

Reverse Proxy: How to relay (encrypted) SSL traffic to a (decrypted) TCP connection?


By : renbear
Date : March 29 2020, 07:55 AM
it helps some times my problem is as follows: , It sounds like stunnel is exactly what you want.
Decrypted string is sometimes not same as encrypted source

Decrypted string is sometimes not same as encrypted source


By : Nick
Date : March 29 2020, 07:55 AM
seems to work fine After reviewing your code and playing with it locally. It would appear that your decryption leaves some whitespace on the decrypted text. I removed the trim() function from all locations except the return value from aes_dec() and the code now encrypts/decrypts your string successfully 1000 times.
So it would seem trimming was the problem and the solution.
code :
class Auth extends MySQLi {
    public function aes_enc($encrypt, $mc_key, $iv)
    {
        $passcrypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, substr($mc_key, 0, 32), $encrypt, MCRYPT_MODE_CBC, $iv);
        return $passcrypt;
    }

    public function aes_dec($decrypt, $mc_key, $iv)
    {
        $decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, substr($mc_key, 0, 32), $decrypt, MCRYPT_MODE_CBC, $iv));
        return $decrypted;

    }

    public function salt()
    {
        return str_shuffle('abcdefghijklmnoprsquvzyx0123456789-.,;:_<>');
    }

    public function iv()
    {
        return mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC), MCRYPT_RAND);
    }
}

$Auth = new Auth;

$str = "verygudlongpassword";

for ($i = 0; $i < 1000; $i++) {
    $salt = sha1($Auth->salt());
    $iv = $Auth->iv();

    $enc = $Auth->aes_enc($str, $salt, $iv);
    $dec = $Auth->aes_dec($enc, $salt, $iv);

    if ($str != $dec) {
        echo "Decryption failed!<br>\n";
    } else {
        echo "Decryption success! String: $dec<br>\n";
    }
}
Encrypted String Isn't Returned Decrypted

Encrypted String Isn't Returned Decrypted


By : Anowarul Kabir
Date : March 29 2020, 07:55 AM
it fixes the issue Played around with it a bit more and got the following to work. The site appears to just grab the first 32 bytes of whatever string you use as key.
code :
    public static string DecryptLikeSite(string base64EncodedCipherText, string key)
    {
        using (var alg = new RijndaelManaged())
        {
            alg.BlockSize = 256;
            alg.Key = System.Text.Encoding.ASCII.GetBytes(key).Take(32).ToArray();
            alg.Mode = CipherMode.ECB;
            alg.Padding = PaddingMode.Zeros;
            alg.IV = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

            var cipherText = Convert.FromBase64String(base64EncodedCipherText);

            using (ICryptoTransform decryptor = alg.CreateDecryptor())
            {
                using (var ms = new MemoryStream(cipherText))
                {
                    using (var cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read))
                    {
                        using (var sr = new StreamReader(cs))
                        {
                            return sr.ReadToEnd().Replace("\0", string.Empty);
                        }
                    }
                }
            }
        }
    }

    public static void Test()
    {
        string key = "yecpPqAJ+PnBMtggWVz42WME3TjhG313OhvBuUJOFtc=";
        string expectedPlainText = "HappyCoding";

        string base64EncodedSiteCipherText = "Lox/sfjNyXOzP9ZE8Fjj9REcuB+iJ1EXXuNjf2du29c=";
        string plainText = DecryptLikeSite(base64EncodedSiteCipherText, key);

        bool success = expectedPlainText == plainText;
    }
Logic Error when trying to output a decrypted string from an encrypted string in Visual Studios C++

Logic Error when trying to output a decrypted string from an encrypted string in Visual Studios C++


By : user1751768
Date : March 29 2020, 07:55 AM
may help you . The issue is that you're using the wrong operator for equality comparisons:
code :
if (enCry[i] = chBase + 25)
if (enCry[i] == chBase + 25)
String that was RSA encrypted using Java contains extra encrypted characters when decrypted using Python

String that was RSA encrypted using Java contains extra encrypted characters when decrypted using Python


By : Gogosoft
Date : March 29 2020, 07:55 AM
hope this fix your issue You are raw decrypting the RSA encrypted text. RSA requires padding to be secure. You need to use a padding mode - probably OAEP - as indicated in the documentation of PyCrypto.
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