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'use strict';
const {
getCiphers: _getCiphers,
getCurves: _getCurves,
getHashes: _getHashes,
setEngine: _setEngine,
timingSafeEqual: _timingSafeEqual
} = process.binding('crypto');
const {
ENGINE_METHOD_ALL
} = process.binding('constants').crypto;
const {
ERR_CRYPTO_ENGINE_UNKNOWN,
ERR_CRYPTO_TIMING_SAFE_EQUAL_LENGTH,
ERR_INVALID_ARG_TYPE
} = require('internal/errors').codes;
const { Buffer } = require('buffer');
const {
cachedResult,
filterDuplicateStrings
} = require('internal/util');
const {
isArrayBufferView
} = require('internal/util/types');
var defaultEncoding = 'buffer';
function setDefaultEncoding(val) {
defaultEncoding = val;
}
function getDefaultEncoding() {
return defaultEncoding;
}
// This is here because many functions accepted binary strings without
// any explicit encoding in older versions of node, and we don't want
// to break them unnecessarily.
function toBuf(str, encoding) {
if (typeof str === 'string') {
if (encoding === 'buffer' || !encoding)
encoding = 'utf8';
return Buffer.from(str, encoding);
}
return str;
}
const getCiphers = cachedResult(() => filterDuplicateStrings(_getCiphers()));
const getHashes = cachedResult(() => filterDuplicateStrings(_getHashes()));
const getCurves = cachedResult(() => filterDuplicateStrings(_getCurves()));
function setEngine(id, flags) {
if (typeof id !== 'string')
throw new ERR_INVALID_ARG_TYPE('id', 'string');
if (flags && typeof flags !== 'number')
throw new ERR_INVALID_ARG_TYPE('flags', 'number');
flags = flags >>> 0;
// Use provided engine for everything by default
if (flags === 0)
flags = ENGINE_METHOD_ALL;
if (!_setEngine(id, flags))
throw new ERR_CRYPTO_ENGINE_UNKNOWN(id);
}
function timingSafeEqual(a, b) {
if (!isArrayBufferView(a)) {
throw new ERR_INVALID_ARG_TYPE('a', ['Buffer', 'TypedArray', 'DataView']);
}
if (!isArrayBufferView(b)) {
throw new ERR_INVALID_ARG_TYPE('b', ['Buffer', 'TypedArray', 'DataView']);
}
if (a.length !== b.length) {
throw new ERR_CRYPTO_TIMING_SAFE_EQUAL_LENGTH();
}
return _timingSafeEqual(a, b);
}
module.exports = {
getCiphers,
getCurves,
getDefaultEncoding,
getHashes,
setDefaultEncoding,
setEngine,
timingSafeEqual,
toBuf
};
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