Press n or j to go to the next uncovered block, b, p or k for the previous block.
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const {
FunctionPrototypeCall,
Promise,
} = primordials;
const { Buffer } = require('buffer');
const {
PBKDF2Job,
kCryptoJobAsync,
kCryptoJobSync,
} = internalBinding('crypto');
const {
validateFunction,
validateInt32,
validateInteger,
validateString,
validateUint32,
} = require('internal/validators');
const { ERR_MISSING_OPTION } = require('internal/errors').codes;
const {
getArrayBufferOrView,
getDefaultEncoding,
normalizeHashName,
kKeyObject,
} = require('internal/crypto/util');
const {
lazyDOMException,
} = require('internal/util');
function pbkdf2(password, salt, iterations, keylen, digest, callback) {
if (typeof digest === 'function') {
callback = digest;
digest = undefined;
}
({ password, salt, iterations, keylen, digest } =
check(password, salt, iterations, keylen, digest));
validateFunction(callback, 'callback');
const job = new PBKDF2Job(
kCryptoJobAsync,
password,
salt,
iterations,
keylen,
digest);
const encoding = getDefaultEncoding();
job.ondone = (err, result) => {
if (err !== undefined)
return FunctionPrototypeCall(callback, job, err);
const buf = Buffer.from(result);
if (encoding === 'buffer')
return FunctionPrototypeCall(callback, job, null, buf);
FunctionPrototypeCall(callback, job, null, buf.toString(encoding));
};
job.run();
}
function pbkdf2Sync(password, salt, iterations, keylen, digest) {
({ password, salt, iterations, keylen, digest } =
check(password, salt, iterations, keylen, digest));
const job = new PBKDF2Job(
kCryptoJobSync,
password,
salt,
iterations,
keylen,
digest);
const { 0: err, 1: result } = job.run();
if (err !== undefined)
throw err;
const buf = Buffer.from(result);
const encoding = getDefaultEncoding();
return encoding === 'buffer' ? buf : buf.toString(encoding);
}
function check(password, salt, iterations, keylen, digest) {
validateString(digest, 'digest');
password = getArrayBufferOrView(password, 'password');
salt = getArrayBufferOrView(salt, 'salt');
// OpenSSL uses a signed int to represent these values, so we are restricted
// to the 31-bit range here (which is plenty).
validateInt32(iterations, 'iterations', 1);
validateInt32(keylen, 'keylen', 0);
return { password, salt, iterations, keylen, digest };
}
async function pbkdf2DeriveBits(algorithm, baseKey, length) {
const { iterations } = algorithm;
let { hash } = algorithm;
const salt = getArrayBufferOrView(algorithm.salt, 'algorithm.salt');
if (hash === undefined)
throw new ERR_MISSING_OPTION('algorithm.hash');
validateInteger(iterations, 'algorithm.iterations');
if (iterations === 0)
throw lazyDOMException(
'iterations cannot be zero',
'OperationError');
hash = normalizeHashName(hash.name);
const raw = baseKey[kKeyObject].export();
let byteLength = 64; // the default
if (length !== undefined) {
if (length === 0)
throw lazyDOMException('length cannot be zero', 'OperationError');
if (length === null)
throw lazyDOMException('length cannot be null', 'OperationError');
validateUint32(length, 'length');
if (length % 8) {
throw lazyDOMException(
'length must be a multiple of 8',
'OperationError');
}
byteLength = length / 8;
}
return new Promise((resolve, reject) => {
pbkdf2(raw, salt, iterations, byteLength, hash, (err, result) => {
if (err) return reject(err);
resolve(result.buffer);
});
});
}
module.exports = {
pbkdf2,
pbkdf2Sync,
pbkdf2DeriveBits,
};
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