aead-poly1305.md

/*
 * Neuroxiq 2022
 * Arctium Project / Code example
 * 
 * 
 * 
 */


using Arctium.Cryptography.Ciphers.BlockCiphers;
using Arctium.Cryptography.Ciphers.StreamCiphers;
using Arctium.Shared.Helpers.Buffers;
using Arctium.Standards.RFC;

namespace ConsoleAppTest
{
    internal class MainProgram
    { 
        static void Main()
        {
            byte[] key = new byte[32];
            byte[] toEncrypt = new byte[128];
            byte[] additionalAssociatedData = new byte[12];
            byte[] encrypted = new byte[128];
            byte[] computedAuthTag = new byte[64];
            byte[] decrypted = new byte[128];

            // create cipher
            int authTagLen = 16;
            AEAD aead = new AEAD_CHACHA20_POLY1305(key);

            // encrypt
            byte[] iv = new byte[12];

            aead.AuthenticatedEncryption(
                iv, 0, 12,
                toEncrypt, 0, 128,
                additionalAssociatedData, 0, 12,
                encrypted, 0,
                computedAuthTag, 0);

            // decrypt
            bool isAuthTagValid;
            aead.AuthenticatedDecryption(
                iv, 0, 12,
                encrypted, 0, 128,
                additionalAssociatedData, 0, 12,
                decrypted, 0,
                computedAuthTag, 0,
                out isAuthTagValid);


            Console.WriteLine("Encrypted: ");
            MemDump.HexDump(encrypted);
            Console.WriteLine("Decrypted: ");
            MemDump.HexDump(decrypted);
            Console.WriteLine("Is auth tag valid: {0}", isAuthTagValid);
        }
    }
}
/*
Encrypted:
9F07E7BE 5551387A 98BA977C 732D080D
CB0F29A0 48E36569 12C6533E 32EE7AED
29B72176 9CE64E43 D57133B0 74D839D5
31ED1F28 510AFB45 ACE10A1F 4B794D6F
2D09A0E6 63266CE1 AE7ED108 1968A075
8E718E99 7BD362C6 B0C34634 A9A0B35D
01273768 1F7B5D0F 281E3AFD E458BC1E
73D2D313 C9CF94C0 5FF37162 40A248F2

Decrypted:
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000

Is auth tag valid: True
 */