31 lines
846 B
JavaScript
31 lines
846 B
JavaScript
/*
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CryptoJS v3.1.2
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code.google.com/p/crypto-js
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(c) 2009-2013 by Jeff Mott. All rights reserved.
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code.google.com/p/crypto-js/wiki/License
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*/
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/**
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* ISO 10126 padding strategy.
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*/
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CryptoJS.pad.Iso10126 = {
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pad: function (data, blockSize) {
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// Shortcut
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var blockSizeBytes = blockSize * 4;
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// Count padding bytes
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var nPaddingBytes = blockSizeBytes - data.sigBytes % blockSizeBytes;
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// Pad
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data.concat(CryptoJS.lib.WordArray.random(nPaddingBytes - 1)).
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concat(CryptoJS.lib.WordArray.create([nPaddingBytes << 24], 1));
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},
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unpad: function (data) {
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// Get number of padding bytes from last byte
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var nPaddingBytes = data.words[(data.sigBytes - 1) >>> 2] & 0xff;
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// Remove padding
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data.sigBytes -= nPaddingBytes;
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}
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};
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