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Bad data exception in decryption

Akash Dani

7y2.1kC#

I am using TripleDES algoritm for encryption and decryption. When I try to decrypt the value it shows Bad data exception

Is there any way to solve this?

My code:
public string DecryptTripleDES(string CypherText, string key)
{

byte[] inputBuffer = Convert.FromBase64String(CypherText);
return Encoding.Unicode.GetString(PCIDSS.CreateDES(key).CreateDecryptor().TransformFinalBlock(inputBuffer,0, inputBuffer.Length));

}

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Amit Kumar7y ago
Hi, If you use an IV, then you should use CipherMode.CBC. ECB does not use any IV. In addition, your data is not padded at all, it contains exactly 32 bytes. To test decryption, it is common to try without padding first. That way you can determine by eye which padding is used by looking at the resulting plaintext. See the below link it will help you. https://social.msdn.microsoft.com/Forums/ie/en-US/e82f8000-b9ea-486e-b55d-39ee1716a865/triple-des-decryption-error-quotbad-dataquot?forum=netfxbcl
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