corrade-nucleus-nucleons
/base/000_base/node_modules/cryptojs/lib/PBKDF2.js |
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(function(){ |
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var C = (typeof window === 'undefined') ? require('./Crypto').Crypto : window.Crypto; |
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// Shortcuts |
var util = C.util, |
charenc = C.charenc, |
UTF8 = charenc.UTF8, |
Binary = charenc.Binary; |
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C.PBKDF2 = function (password, salt, keylen, options) { |
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// Convert to byte arrays |
if (password.constructor == String) password = UTF8.stringToBytes(password); |
if (salt.constructor == String) salt = UTF8.stringToBytes(salt); |
/* else, assume byte arrays already */ |
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// Defaults |
var hasher = options && options.hasher || C.SHA1, |
iterations = options && options.iterations || 1; |
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// Pseudo-random function |
function PRF(password, salt) { |
return C.HMAC(hasher, salt, password, { asBytes: true }); |
} |
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// Generate key |
var derivedKeyBytes = [], |
blockindex = 1; |
while (derivedKeyBytes.length < keylen) { |
var block = PRF(password, salt.concat(util.wordsToBytes([blockindex]))); |
for (var u = block, i = 1; i < iterations; i++) { |
u = PRF(password, u); |
for (var j = 0; j < block.length; j++) block[j] ^= u[j]; |
} |
derivedKeyBytes = derivedKeyBytes.concat(block); |
blockindex++; |
} |
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// Truncate excess bytes |
derivedKeyBytes.length = keylen; |
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return options && options.asBytes ? derivedKeyBytes : |
options && options.asString ? Binary.bytesToString(derivedKeyBytes) : |
util.bytesToHex(derivedKeyBytes); |
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}; |
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})(); |