AES-256 Encryption and Decryption in Go

This package implements text encryption and decryption using AES-256 algorithm in CFB (Cipher Feedback Mode).The code is written in Go language and includes functions for key generation, text encryption and ciphertext decryption. A buffer pool is also used to optimise performance.

Functions:
1)Encrypt: Encrypts the given plaintext using AES-256. Returns the encrypted ciphertext and the key used for encryption. 2)Decrypt: Decrypts the given ciphertext using AES-256. Returns the decrypted plaintext.

Variables: errCiphertextTooShort: An error that occurs if the ciphertext is too short. bufferPool: A pool of buffers to optimise performance.

Encryption: Use the Encrypt function to encrypt text. It accepts a string of plaintext and returns the encrypted ciphertext in base64 format and the key used for encryption.

Decryption: To decrypt the text, use the Decrypt function. It accepts a base64 encrypted ciphertext and the key used for encryption and returns the decrypted plaintext.