From f5c329030dc2bcb8ffb6f36ad01b4447527770f1 Mon Sep 17 00:00:00 2001
From: Bernd Schoolmann <mail@quexten.com>
Date: Mon, 3 Jul 2023 14:12:42 +0200
Subject: [PATCH] Make Argon2 WebAssembly module unload after use (#5072)

---
 .../services/web-crypto-function.service.ts   |  1 +
 patches/argon2-browser+1.18.0.patch           | 24 +++++++++++--------
 2 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/libs/common/src/platform/services/web-crypto-function.service.ts b/libs/common/src/platform/services/web-crypto-function.service.ts
index 18bec1a8f6..65ee74aa63 100644
--- a/libs/common/src/platform/services/web-crypto-function.service.ts
+++ b/libs/common/src/platform/services/web-crypto-function.service.ts
@@ -69,6 +69,7 @@ export class WebCryptoFunctionService implements CryptoFunctionService {
       hashLen: 32,
       type: argon2.ArgonType.Argon2id,
     });
+    argon2.unloadRuntime();
     return result.hash;
   }
 
diff --git a/patches/argon2-browser+1.18.0.patch b/patches/argon2-browser+1.18.0.patch
index 7161e9aa6e..160661cd91 100644
--- a/patches/argon2-browser+1.18.0.patch
+++ b/patches/argon2-browser+1.18.0.patch
@@ -1,5 +1,5 @@
 diff --git a/node_modules/argon2-browser/lib/argon2.js b/node_modules/argon2-browser/lib/argon2.js
-index ffa77a5..b498e2d 100644
+index ffa77a5..98b2f13 100644
 --- a/node_modules/argon2-browser/lib/argon2.js
 +++ b/node_modules/argon2-browser/lib/argon2.js
 @@ -78,16 +78,27 @@
@@ -36,10 +36,16 @@ index ffa77a5..b498e2d 100644
          return fetch(wasmPath)
              .then((response) => response.arrayBuffer())
              .then((ab) => new Uint8Array(ab));
-@@ -354,6 +365,24 @@
-         }
-     }
- 
+@@ -351,7 +362,28 @@
+             loadModule._module.unloadRuntime();
+             delete loadModule._promise;
+             delete loadModule._module;
++            if (typeof require !== 'undefined') {
++                delete require.cache[require.resolve('../dist/argon2.js')]
++            }
++        }
++    }
++
 +    // ref: https://stackoverflow.com/a/47880734/1090359
 +    // ref: https://github.com/GoogleChromeLabs/wasm-feature-detect/blob/main/src/detectors/simd/module.wat (translated with wat2wasm)
 +    function checkIfSIMDSupported() {
@@ -54,10 +60,8 @@ index ffa77a5..b498e2d 100644
 +            }
 +        } catch {
 +            return false;
-+        }
+         }
 +        return false;
-+    }
-+
+     }
+ 
      return {
-         ArgonType,
-         hash: argon2Hash,