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// Copyright © 2021 siddharth ravikumar <s@ricketyspace.net>
// SPDX-License-Identifier: ISC
package challenge
import (
"fmt"
"ricketyspace.net/cryptopals/lib"
)
// Cryptopals #18 - Implement CTR, the stream cipher mode
func C18() {
cipher := lib.Base64ToBytes("L77na/nrFsKvynd6HzOoG7GHTLXsTVu9qvY/2syLXzhPweyyMTJULu/6/kXX0KSvoOLSFQ==")
key := lib.StrToBytes("YELLOW SUBMARINE")
ctrFunc := lib.AESGenCTRFunc(0)
plain, err := lib.AESDecryptCTR(cipher, key, ctrFunc)
if err != nil {
fmt.Printf("decryption failed: %v", err)
}
fmt.Printf("%v\n", lib.BytesToStr(plain))
}
// Output:
// Yo, VIP Let's kick it Ice, Ice, baby Ice, Ice, baby
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