(JavaScript) 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.
var success = false;
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
var crypt = new CkCrypt2();
// 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";
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...|...
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