invalid length for a base-64 char array while decrypting the string : The Official Microsoft ASP.NET Forums

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jack_shivani...

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invalid length for a base-64 char array while decrypting the string

Nov 19, 2012 01:48 PM|LINK

Hi Friends,

I have written a code for encryption and decryption. Its throwing error "invalid length for a base-64 char array while decrypting the string". My code is below. Please help me to solve this issue.

private byte[] key = { };
        private byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef };
        private string sEncryptionKey = "r0b1nr0y";

        public string Decrypt(string stringToDecrypt)
        {
            byte[] inputByteArray = new byte[stringToDecrypt.Length];
            try
            {
                key = System.Text.Encoding.UTF8.GetBytes(sEncryptionKey);
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                inputByteArray = Convert.FromBase64String(stringToDecrypt.Replace(" ","+"));
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms,des.CreateDecryptor(key, IV), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                System.Text.Encoding encoding = System.Text.Encoding.UTF8;
                return encoding.GetString(ms.ToArray());
            }
            catch (Exception e)
            {
                return e.Message;
            }
        }

        public string Encrypt(string stringToEncrypt)
        {
            try
            {
                key = System.Text.Encoding.UTF8.GetBytes(sEncryptionKey);
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                byte[] inputByteArray = Encoding.UTF8.GetBytes(stringToEncrypt);
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms,
                  des.CreateEncryptor(key, IV), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                return Convert.ToBase64String(ms.ToArray());
            }
            catch (Exception e)
            {
                return e.Message;
            }
        }