func (e *Block) DecryptCBCBlock(input, iv []byte) ([]byte, error) {
if len(input) != e.BlockSize {
return nil, BlockSizeError
}
plaintext := make([]byte, e.BlockSize)
e.Cypher.Decrypt(plaintext[0:e.BlockSize], input[0:e.BlockSize])
return xor.ApplyFixed(plaintext, iv)
}
func (e *Block) EncryptCBCBlock(input, iv []byte) ([]byte, error) {
if len(input) != e.BlockSize {
return nil, BlockSizeError
}
encryptedtext := make([]byte, e.BlockSize)
input, err := xor.ApplyFixed(input, iv)
if err != nil {
return nil, err
}
e.Cypher.Encrypt(encryptedtext[0:e.BlockSize], input[0:e.BlockSize])
return encryptedtext, nil
}
func main() {
inputa := "1c0111001f010100061a024b53535009181c"
inputb := "686974207468652062756c6c277320657965"
if a, err := conversion.HexToBytes(inputa); err != nil {
fmt.Println(err)
} else if b, err := conversion.HexToBytes(inputb); err != nil {
fmt.Println(err)
} else if result, err := xor.ApplyFixed(a, b); err != nil {
fmt.Println(err)
} else {
fmt.Println("Input 1:", inputa)
fmt.Println("Input 2:", inputb)
fmt.Println("Output:", conversion.BytesToHex(result))
}
}