pad-iso10126.js
1.09 KB
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;(function (root, factory, undef) {
if (typeof exports === "object") {
// CommonJS
module.exports = exports = factory(require("./core"), require("./cipher-core"));
}
else if (typeof define === "function" && define.amd) {
// AMD
define(["./core", "./cipher-core"], factory);
}
else {
// Global (browser)
factory(root.CryptoJS);
}
}(this, function (CryptoJS) {
/**
* ISO 10126 padding strategy.
*/
CryptoJS.pad.Iso10126 = {
pad: function (data, blockSize) {
// Shortcut
var blockSizeBytes = blockSize * 4;
// Count padding bytes
var nPaddingBytes = blockSizeBytes - data.sigBytes % blockSizeBytes;
// Pad
data.concat(CryptoJS.lib.WordArray.random(nPaddingBytes - 1)).
concat(CryptoJS.lib.WordArray.create([nPaddingBytes << 24], 1));
},
unpad: function (data) {
// Get number of padding bytes from last byte
var nPaddingBytes = data.words[(data.sigBytes - 1) >>> 2] & 0xff;
// Remove padding
data.sigBytes -= nPaddingBytes;
}
};
return CryptoJS.pad.Iso10126;
}));