From 353b879b9af7db84537e8747ef64b3e3acdcc261 Mon Sep 17 00:00:00 2001
From: Justin Robb <reptarsrage@gmail.com>
Date: Tue, 19 Oct 2021 18:48:07 -0700
Subject: [PATCH] Adding new hashType configuration option

---
 README.md       |  2 ++
 src/cache.js    | 10 +++++++---
 src/index.js    |  3 +++
 src/schema.json |  4 ++++
 4 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index f63ea7e0..5d4a756a 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,8 @@ This loader also supports the following loader-specific option:
 
 * `metadataSubscribers`: Default `[]`. Takes an array of context function names. E.g. if you passed ['myMetadataPlugin'], you'd assign a subscriber function to `context.myMetadataPlugin` within your webpack plugin's hooks & that function will be called with `metadata`.
 
+* `hashType`: Default `md4`. The hash digest function to use. If you hit an `ERR_OSSL_EVP_UNSUPPORTED` error in your application with Node.js 17, it’s likely that your attempting to use an algorithm which is no longer allowed by default with OpenSSL 3.0. You can specify `md5` here to fix the issue.
+
 ## Troubleshooting
 
 ### babel-loader is slow!
diff --git a/src/cache.js b/src/cache.js
index 390424f0..c1db2164 100644
--- a/src/cache.js
+++ b/src/cache.js
@@ -62,8 +62,8 @@ const write = async function (filename, compress, result) {
  *
  * @return {String}
  */
-const filename = function (source, identifier, options) {
-  const hash = crypto.createHash("md5");
+const filename = function (source, identifier, options, hashType) {
+  const hash = crypto.createHash(hashType || "md4");
 
   const contents = JSON.stringify({ source, options, identifier });
 
@@ -85,9 +85,11 @@ const handleCache = async function (directory, params) {
     cacheIdentifier,
     cacheDirectory,
     cacheCompression,
+    hashType,
   } = params;
 
-  const file = path.join(directory, filename(source, cacheIdentifier, options));
+  const name = filename(source, cacheIdentifier, options, hashType);
+  const file = path.join(directory, name);
 
   try {
     // No errors mean that the file was previously cached
@@ -135,6 +137,7 @@ const handleCache = async function (directory, params) {
  * @param  {String}   params.cacheDirectory   Directory to store cached files
  * @param  {String}   params.cacheIdentifier  Unique identifier to bust cache
  * @param  {Boolean}  params.cacheCompression Whether compressing cached files
+ * @param  {Boolean}  params.hashType Hash digest to use for file names
  * @param  {String}   params.source   Original contents of the file to be cached
  * @param  {Object}   params.options  Options to be given to the transform fn
  *
@@ -144,6 +147,7 @@ const handleCache = async function (directory, params) {
  *     cacheDirectory: '.tmp/cache',
  *     cacheIdentifier: 'babel-loader-cachefile',
  *     cacheCompression: false,
+ *     hashType: 'md4',
  *     source: *source code from file*,
  *     options: {
  *       experimental: true,
diff --git a/src/index.js b/src/index.js
index 07eec2a1..c5894a56 100644
--- a/src/index.js
+++ b/src/index.js
@@ -150,6 +150,7 @@ async function loader(source, inputSourceMap, overrides) {
   delete programmaticOptions.cacheIdentifier;
   delete programmaticOptions.cacheCompression;
   delete programmaticOptions.metadataSubscribers;
+  delete programmaticOptions.hashType;
 
   if (!babel.loadPartialConfig) {
     throw new Error(
@@ -193,6 +194,7 @@ async function loader(source, inputSourceMap, overrides) {
       }),
       cacheCompression = true,
       metadataSubscribers = [],
+      hashType = null,
     } = loaderOptions;
 
     let result;
@@ -204,6 +206,7 @@ async function loader(source, inputSourceMap, overrides) {
         cacheDirectory,
         cacheIdentifier,
         cacheCompression,
+        hashType,
       });
     } else {
       result = await transform(source, options);
diff --git a/src/schema.json b/src/schema.json
index 9c52785a..f845d367 100644
--- a/src/schema.json
+++ b/src/schema.json
@@ -22,6 +22,10 @@
     "customize": {
       "type": "string",
       "default": null
+    },
+    "hashType": {
+      "type": "string",
+      "default": null
     }
   },
   "additionalProperties": true