46 lines
1.6 KiB
JavaScript
46 lines
1.6 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", { value: true });
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var bytes_1 = require("../utils/bytes");
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var hmac_1 = require("./hmac");
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function pbkdf2(password, salt, iterations, keylen, hashAlgorithm) {
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password = bytes_1.arrayify(password);
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salt = bytes_1.arrayify(salt);
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var hLen;
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var l = 1;
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var DK = new Uint8Array(keylen);
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var block1 = new Uint8Array(salt.length + 4);
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block1.set(salt);
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//salt.copy(block1, 0, 0, salt.length)
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var r;
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var T;
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for (var i = 1; i <= l; i++) {
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//block1.writeUInt32BE(i, salt.length)
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block1[salt.length] = (i >> 24) & 0xff;
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block1[salt.length + 1] = (i >> 16) & 0xff;
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block1[salt.length + 2] = (i >> 8) & 0xff;
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block1[salt.length + 3] = i & 0xff;
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//var U = createHmac(password).update(block1).digest();
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var U = hmac_1.computeHmac(hashAlgorithm, password, block1);
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if (!hLen) {
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hLen = U.length;
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T = new Uint8Array(hLen);
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l = Math.ceil(keylen / hLen);
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r = keylen - (l - 1) * hLen;
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}
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//U.copy(T, 0, 0, hLen)
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T.set(U);
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for (var j = 1; j < iterations; j++) {
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//U = createHmac(password).update(U).digest();
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U = hmac_1.computeHmac(hashAlgorithm, password, U);
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for (var k = 0; k < hLen; k++)
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T[k] ^= U[k];
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}
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var destPos = (i - 1) * hLen;
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var len = (i === l ? r : hLen);
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//T.copy(DK, destPos, 0, len)
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DK.set(bytes_1.arrayify(T).slice(0, len), destPos);
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}
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return bytes_1.arrayify(DK);
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}
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exports.pbkdf2 = pbkdf2;
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