[crypto] Implement `scryptSync`

Fixes https://github.com/oven-sh/bun/issues/1228

1 files changed, 49 insertions, 0 deletions

diff --git a/src/node-fallbacks/crypto.js b/src/node-fallbacks/crypto.js
index 0f428df13..4a0e4c735 100644
--- a/src/node-fallbacks/crypto.js
+++ b/src/node-fallbacks/crypto.js
@@ -1,5 +1,7 @@
 export * from "crypto-browserify";
 
+export var DEFAULT_ENCODING = "buffer";
+
 // we deliberately reference crypto. directly here because we want to preserve the This binding
 export const getRandomValues = (array) => {
   return crypto.getRandomValues(array);
@@ -25,15 +27,62 @@ export const timingSafeEqual =
           throw new RangeError("Input buffers must have the same length");
         }
 
+        // these error checks are also performed in the function
+        // however there is a bug where exceptions return no value
         return crypto.timingSafeEqual(a, b);
       }
     : undefined;
 
+export const scryptSync =
+  "scryptSync" in crypto
+    ? (password, salt, keylen, options) => {
+        const res = crypto.scryptSync(password, salt, keylen, options);
+        return DEFAULT_ENCODING !== "buffer"
+          ? new Buffer(res).toString(DEFAULT_ENCODING)
+          : new Buffer(res);
+      }
+    : undefined;
+
+export const scrypt =
+  "scryptSync" in crypto
+    ? function (password, salt, keylen, options, callback) {
+        if (typeof options === "function") {
+          callback = options;
+          options = undefined;
+        }
+
+        if (typeof callback !== "function") {
+          var err = new TypeError("callback must be a function");
+          err.code = "ERR_INVALID_CALLBACK";
+          throw err;
+        }
+
+        try {
+          const result = crypto.scryptSync(password, salt, keylen, options);
+          process.nextTick(
+            callback,
+            null,
+            DEFAULT_ENCODING !== "buffer"
+              ? new Buffer(result).toString(DEFAULT_ENCODING)
+              : new Buffer(result),
+          );
+        } catch (err) {
+          throw err;
+        }
+      }
+    : undefined;
+
 if (timingSafeEqual) {
   // hide it from stack trace
   Object.defineProperty(timingSafeEqual, "name", {
     value: "::bunternal::",
   });
+  Object.defineProperty(scrypt, "name", {
+    value: "::bunternal::",
+  });
+  Object.defineProperty(scryptSync, "name", {
+    value: "::bunternal::",
+  });
 }
 
 export const webcrypto = crypto;