Spaces:
Runtime error
Runtime error
File size: 3,984 Bytes
7d73cf2 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 |
;(function (root, factory) {
if (typeof exports === "object") {
// CommonJS
module.exports = exports = factory(require("./core"));
}
else if (typeof define === "function" && define.amd) {
// AMD
define(["./core"], factory);
}
else {
// Global (browser)
factory(root.CryptoJS);
}
}(this, function (CryptoJS) {
(function () {
// Shortcuts
var C = CryptoJS;
var C_lib = C.lib;
var Base = C_lib.Base;
var C_enc = C.enc;
var Utf8 = C_enc.Utf8;
var C_algo = C.algo;
/**
* HMAC algorithm.
*/
var HMAC = C_algo.HMAC = Base.extend({
/**
* Initializes a newly created HMAC.
*
* @param {Hasher} hasher The hash algorithm to use.
* @param {WordArray|string} key The secret key.
*
* @example
*
* var hmacHasher = CryptoJS.algo.HMAC.create(CryptoJS.algo.SHA256, key);
*/
init: function (hasher, key) {
// Init hasher
hasher = this._hasher = new hasher.init();
// Convert string to WordArray, else assume WordArray already
if (typeof key == 'string') {
key = Utf8.parse(key);
}
// Shortcuts
var hasherBlockSize = hasher.blockSize;
var hasherBlockSizeBytes = hasherBlockSize * 4;
// Allow arbitrary length keys
if (key.sigBytes > hasherBlockSizeBytes) {
key = hasher.finalize(key);
}
// Clamp excess bits
key.clamp();
// Clone key for inner and outer pads
var oKey = this._oKey = key.clone();
var iKey = this._iKey = key.clone();
// Shortcuts
var oKeyWords = oKey.words;
var iKeyWords = iKey.words;
// XOR keys with pad constants
for (var i = 0; i < hasherBlockSize; i++) {
oKeyWords[i] ^= 0x5c5c5c5c;
iKeyWords[i] ^= 0x36363636;
}
oKey.sigBytes = iKey.sigBytes = hasherBlockSizeBytes;
// Set initial values
this.reset();
},
/**
* Resets this HMAC to its initial state.
*
* @example
*
* hmacHasher.reset();
*/
reset: function () {
// Shortcut
var hasher = this._hasher;
// Reset
hasher.reset();
hasher.update(this._iKey);
},
/**
* Updates this HMAC with a message.
*
* @param {WordArray|string} messageUpdate The message to append.
*
* @return {HMAC} This HMAC instance.
*
* @example
*
* hmacHasher.update('message');
* hmacHasher.update(wordArray);
*/
update: function (messageUpdate) {
this._hasher.update(messageUpdate);
// Chainable
return this;
},
/**
* Finalizes the HMAC computation.
* Note that the finalize operation is effectively a destructive, read-once operation.
*
* @param {WordArray|string} messageUpdate (Optional) A final message update.
*
* @return {WordArray} The HMAC.
*
* @example
*
* var hmac = hmacHasher.finalize();
* var hmac = hmacHasher.finalize('message');
* var hmac = hmacHasher.finalize(wordArray);
*/
finalize: function (messageUpdate) {
// Shortcut
var hasher = this._hasher;
// Compute HMAC
var innerHash = hasher.finalize(messageUpdate);
hasher.reset();
var hmac = hasher.finalize(this._oKey.clone().concat(innerHash));
return hmac;
}
});
}());
})); |