From 7e362164868c9f2bd0aa58320ca22cbeee90c831 Mon Sep 17 00:00:00 2001
From: Herbert Poul <herbert@codeux.design>
Date: Tue, 18 Aug 2020 13:27:22 +0200
Subject: [PATCH] Better error message for mac os when unable to load dylib.

---
 CHANGELOG.md                 | 4 ++++
 lib/src/argon2_ffi_impl.dart | 9 +++++++++
 pubspec.yaml                 | 2 +-
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72860d5..eddda3f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.1.4+3
+
+* Better error message for mac os when unable to load dylib.
+
 ## 0.1.4+2
 
 * separate implementation to allow dart:html compilation.
diff --git a/lib/src/argon2_ffi_impl.dart b/lib/src/argon2_ffi_impl.dart
index cef10b8..1e363bb 100644
--- a/lib/src/argon2_ffi_impl.dart
+++ b/lib/src/argon2_ffi_impl.dart
@@ -126,6 +126,15 @@ class Argon2FfiFlutter extends Argon2Base {
           'Error while loading dynamic library from $path ($libraryName)',
           e,
           stackTrace);
+      if (e.message.toString().contains('hardened programs')) {
+        final message = 'Unable to load argon2 library. On MacOS you have to '
+            'remove hardening from dart binary:\n\n'
+            'codesign --remove-signature ${Platform.resolvedExecutable}\n\n'
+            'https://github.com/dart-lang/sdk/issues/39231#issuecomment-579743656';
+        _logger.shout(message);
+        throw ArgumentError('${e.message}\n\n$message');
+      }
+
       rethrow;
     }
   }
diff --git a/pubspec.yaml b/pubspec.yaml
index 6a9c861..6e8588e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: argon2_ffi_base
 description: Base package defining the interface for an Argon2 implementation.
-version: 0.1.4+2
+version: 0.1.4+3
 homepage: https://github.com/authpass/argon2_ffi_base
 
 environment: