Enable decoding of unpadded base64 strings

Closes DevToys-app#178
Regenhardt · Mar 21, 2022 · 4612bfe · 4612bfe
1 parent f438f1c
commit 4612bfe
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diff --git a/...ewModels/Tools/EncodersDecoders/Base64EncoderDecoder/Base64EncoderDecoderToolViewModel.cs b/...ewModels/Tools/EncodersDecoders/Base64EncoderDecoder/Base64EncoderDecoderToolViewModel.cs
@@ -200,6 +200,12 @@ private async Task<string> DecodeBase64DataAsync(string? data)
                 return string.Empty;
             }
 
+            int padding = data!.Length % 4;
+            if (padding > 0)
+            {
+                data = data.PadRight(data.Length + padding, '=');
+            }
+
             await TaskScheduler.Default;
             string? decoded = string.Empty;
 

diff --git a/src/tests/DevToys.Tests/Providers/Tools/Base64EncoderDecoderTests.cs b/src/tests/DevToys.Tests/Providers/Tools/Base64EncoderDecoderTests.cs
@@ -54,6 +54,7 @@ await ThreadHelper.RunOnUIThreadAsync(() =>
         [DataRow("", "")]
         [DataRow(" ", "")]
         [DataRow("SGVsbG8gVGhlcmU=", "Hello There")]
+        [DataRow("SGVsbG8gVGhlcmU", "Hello There")]
         public async Task DecodeAsync(string input, string expectedResult)
         {
             Base64EncoderDecoderToolViewModel viewModel = ExportProvider.Import<Base64EncoderDecoderToolViewModel>();