(Node.js) Poly1305 MAC

Demonstrates the Poly1305 Message Authentication Code. (Introduced in Chilkat v9.5.0.55) This example duplicates the results of Test Vector #4 for Poly1305 in RFC 7539.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var crypt = new chilkat.Crypt2();

    // Set the MAC algorithm to poly1305
    crypt.MacAlgorithm = "poly1305";

    // EncodingMode specifies the encoding of the output for
    // encryption, and the input for decryption.
    // Valid modes are (case insensitive) "Base64", "modBase64", "Base32", "Base58", "UU", 
    // "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", 
    // "Q", "B", "url_oauth", "url_rfc1738", "url_rfc2396", and "url_rfc3986".
    crypt.EncodingMode = "hex";

    // Poly1305 always uses a 32-byte (256-bit) MAC key.
    var keyHex = "1c9240a5eb55d38af333888604f6b5f0473917c1402b80099dca5cbc207075c0";
    var success = crypt.SetMacKeyEncoded(keyHex,"hex");

    var plainText = "'Twas brillig, and the slithy toves\nDid gyre and gimble in the wabe:\nAll mimsy were the borogoves,\nAnd the mome raths outgrabe.";

    // The computed tag should match the Tag shown below.
    // (Note: hexidecimal encoding is case insensitive.)
    var encTag = crypt.MacStringENC(plainText);
    console.log(encTag);

    // Here is the Test Vector data copied from RFC 7539

    //  Test Vector #4:
    //  ==============
    // 
    //  One-time Poly1305 Key:
    //  000  1c 92 40 a5 eb 55 d3 8a f3 33 88 86 04 f6 b5 f0  ..@..U...3......
    //  016  47 39 17 c1 40 2b 80 09 9d ca 5c bc 20 70 75 c0  G9..@+....\. pu.
    // 
    //  Text to MAC:
    //  000  27 54 77 61 73 20 62 72 69 6c 6c 69 67 2c 20 61  'Twas brillig, a
    //  016  6e 64 20 74 68 65 20 73 6c 69 74 68 79 20 74 6f  nd the slithy to
    //  032  76 65 73 0a 44 69 64 20 67 79 72 65 20 61 6e 64  ves.Did gyre and
    //  048  20 67 69 6d 62 6c 65 20 69 6e 20 74 68 65 20 77   gimble in the w
    //  064  61 62 65 3a 0a 41 6c 6c 20 6d 69 6d 73 79 20 77  abe:.All mimsy w
    //  080  65 72 65 20 74 68 65 20 62 6f 72 6f 67 6f 76 65  ere the borogove
    //  096  73 2c 0a 41 6e 64 20 74 68 65 20 6d 6f 6d 65 20  s,.And the mome
    //  112  72 61 74 68 73 20 6f 75 74 67 72 61 62 65 2e     raths outgrabe.
    // 
    //  Tag:
    //  000  45 41 66 9a 7e aa ee 61 e7 08 dc 7c bc c5 eb 62  EAf.~..a...|...

}

chilkatExample();