| 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Tobias Koppers @sokra
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| 4 | */
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| 5 |
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| 6 | "use strict";
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| 7 |
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| 8 | /** @typedef {import("./Hash")} Hash */
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| 9 | /** @typedef {import("../../declarations/WebpackOptions").HashFunction} HashFunction */
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| 10 |
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| 11 | /** @type {typeof import("crypto") | undefined} */
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| 12 | let crypto;
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| 13 | /** @type {typeof import("./hash/xxhash64") | undefined} */
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| 14 | let createXXHash64;
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| 15 | /** @type {typeof import("./hash/md4") | undefined} */
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| 16 | let createMd4;
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| 17 | /** @type {typeof import("./hash/DebugHash") | undefined} */
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| 18 | let DebugHash;
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| 19 | /** @type {typeof import("./hash/BatchedHash") | undefined} */
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| 20 | let BatchedHash;
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| 21 | /** @type {typeof import("./hash/BulkUpdateHash") | undefined} */
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| 22 | let BulkUpdateHash;
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| 23 |
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| 24 | /**
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| 25 | * Creates a hash by name or function
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| 26 | * @param {HashFunction} algorithm the algorithm name or a constructor creating a hash
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| 27 | * @returns {Hash} the hash
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| 28 | */
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| 29 | module.exports = (algorithm) => {
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| 30 | if (typeof algorithm === "function") {
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| 31 | if (BulkUpdateHash === undefined) {
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| 32 | BulkUpdateHash = require("./hash/BulkUpdateHash");
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| 33 | }
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| 34 | // eslint-disable-next-line new-cap
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| 35 | return new BulkUpdateHash(() => new algorithm());
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| 36 | }
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| 37 | switch (algorithm) {
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| 38 | // TODO add non-cryptographic algorithm here
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| 39 | case "debug":
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| 40 | if (DebugHash === undefined) {
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| 41 | DebugHash = require("./hash/DebugHash");
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| 42 | }
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| 43 | return new DebugHash();
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| 44 | case "xxhash64":
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| 45 | if (createXXHash64 === undefined) {
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| 46 | createXXHash64 = require("./hash/xxhash64");
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| 47 | if (BatchedHash === undefined) {
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| 48 | BatchedHash = require("./hash/BatchedHash");
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| 49 | }
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| 50 | }
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| 51 | return new /** @type {typeof import("./hash/BatchedHash")} */ (
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| 52 | BatchedHash
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| 53 | )(createXXHash64());
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| 54 | case "md4":
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| 55 | if (createMd4 === undefined) {
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| 56 | createMd4 = require("./hash/md4");
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| 57 | if (BatchedHash === undefined) {
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| 58 | BatchedHash = require("./hash/BatchedHash");
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| 59 | }
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| 60 | }
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| 61 | return new /** @type {typeof import("./hash/BatchedHash")} */ (
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| 62 | BatchedHash
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| 63 | )(createMd4());
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| 64 | case "native-md4":
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| 65 | if (crypto === undefined) crypto = require("crypto");
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| 66 | if (BulkUpdateHash === undefined) {
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| 67 | BulkUpdateHash = require("./hash/BulkUpdateHash");
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| 68 | }
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| 69 | return new BulkUpdateHash(
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| 70 | () =>
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| 71 | /** @type {Hash} */ (
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| 72 | /** @type {typeof import("crypto")} */
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| 73 | (crypto).createHash("md4")
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| 74 | ),
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| 75 | "md4"
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| 76 | );
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| 77 | default:
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| 78 | if (crypto === undefined) crypto = require("crypto");
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| 79 | if (BulkUpdateHash === undefined) {
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| 80 | BulkUpdateHash = require("./hash/BulkUpdateHash");
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| 81 | }
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| 82 | return new BulkUpdateHash(
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| 83 | () =>
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| 84 | /** @type {Hash} */ (
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| 85 | /** @type {typeof import("crypto")} */
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| 86 | (crypto).createHash(algorithm)
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| 87 | ),
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| 88 | algorithm
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| 89 | );
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| 90 | }
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| 91 | };
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