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49 lines
1.2 KiB
49 lines
1.2 KiB
;(function (root, factory, undef) { |
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if (typeof exports === "object") { |
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// CommonJS |
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module.exports = exports = factory(require("./core"), require("./cipher-core")); |
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} |
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else if (typeof define === "function" && define.amd) { |
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// AMD |
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define(["./core", "./cipher-core"], factory); |
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} |
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else { |
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// Global (browser) |
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factory(root.CryptoJS); |
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} |
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}(this, function (CryptoJS) { |
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|
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/** |
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* ANSI X.923 padding strategy. |
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*/ |
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CryptoJS.pad.AnsiX923 = { |
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pad: function (data, blockSize) { |
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// Shortcuts |
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var dataSigBytes = data.sigBytes; |
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var blockSizeBytes = blockSize * 4; |
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|
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// Count padding bytes |
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var nPaddingBytes = blockSizeBytes - dataSigBytes % blockSizeBytes; |
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|
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// Compute last byte position |
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var lastBytePos = dataSigBytes + nPaddingBytes - 1; |
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// Pad |
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data.clamp(); |
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data.words[lastBytePos >>> 2] |= nPaddingBytes << (24 - (lastBytePos % 4) * 8); |
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data.sigBytes += nPaddingBytes; |
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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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return CryptoJS.pad.Ansix923; |
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})); |