Bouncycastle decrypt example c#

I am using the "BouncyCastle. I am using the following code from this blog :. To get a bit key you need a 16 byte string, so I'd go on the safe side and use a 16 character string so it will be a bit key if using single byte characters and if using wide characters. How are we doing? Please help us improve Stack Overflow. Take our short survey.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 10 years, 8 months ago. Active 1 year, 8 months ago. Viewed 46k times. I am using the following code from this blog : I have a class BCEngine, exactly the same as the one given in the link mentioned above.

GetBytes plain , key ; return Convert. Please encrypt me. I am a complete newbie to this. Thanks in Advance. Improve this question. Octopoid 3, 5 5 gold badges 20 20 silver badges 43 43 bronze badges. Hari Hari 1 1 gold badge 9 9 silver badges 20 20 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. Matt Matt 6, 2 2 gold badges 26 26 silver badges 55 55 bronze badges. Has it got something to do with padding. If yes, how can I handle it? Our wrapper is using following 2 variations of the transforms.

CreateKeyParameters would create appropriate key parameters to pass to initialise method of the cipher depending on current cipher mode. We will now create cipher using CipherUtilities helper of BouncyCastle and initialise it with encryptMode and keyParameters.

Convert plain text string to bytes and call DoFinal method on cipher object to encrypt data. Decrypt method works in conjunction with Encrypt method above, it accepts base64 encoded cipher text string and key.

It unpacks base64 encoded string to get iv, gcm tag size if CipherMode is GCM and encrypted data bytes and performs decryption and returns plain text. We will start by unpacking cipher text to get IV used to encrypt data, gcm tag size and encrypted data bytes and follow that by creating key parameters using helper method CreateKeyParameters.

We will follow that by creating cipher using CipherUtilities helper of BouncyCastle and initialise it with decryption mode and key parameters. Call DoFinal method on cipher object to decrypt data. Complete code for the wrapper class that implements encryption and decryption using BouncyCastle Aes can be found at AesBcCrypto. Unit tests for the wrapper class can be found at AesBcCryptoTests. Complete project as class library along with tests is at CryptoSandbox.

Your email address will not be published. This post is about how I enabled staticman on this github pages site powered by Minimal Mistaks as remote theme. Kashif Soofi My awesome biography constrained to a sentence or two goes here. Implementation Lets start using AES in our code. We would need to include following namespaces. Crypto ; using Org.