diff --git a/crypto/test/src/crypto/test/PSSTest.cs b/crypto/test/src/crypto/test/PSSTest.cs
index 599c2c8c7..72558e62f 100644
--- a/crypto/test/src/crypto/test/PSSTest.cs
+++ b/crypto/test/src/crypto/test/PSSTest.cs
@@ -4,6 +4,7 @@ using NUnit.Framework;
using Org.BouncyCastle.Crypto.Digests;
using Org.BouncyCastle.Crypto.Engines;
+using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto.Signers;
using Org.BouncyCastle.Math;
@@ -215,7 +216,44 @@ namespace Org.BouncyCastle.Crypto.Tests
get { return "PSSTest"; }
}
- private void doTestSig(
+ [Test]
+ public void TestRegression_GitHub_bc_csharp_524()
+ {
+ SecureRandom secureRandom = new SecureRandom();
+
+ var kpg = new RsaKeyPairGenerator();
+ kpg.Init(new RsaKeyGenerationParameters(BigInteger.ValueOf(17), secureRandom, 1024, 100));
+ var keyPair = kpg.GenerateKeyPair();
+
+ var digest = new Sha256Digest();
+
+ var hash = SecureRandom.GetNextBytes(secureRandom, digest.GetDigestSize());
+
+ var signer = PssSigner.CreateRawSigner(new RsaBlindedEngine(), digest);
+ signer.Init(true, keyPair.Private);
+ // NOTE: .NET Core 3.1 has Span<T>, but is tested against our .NET Standard 2.0 assembly.
+ //#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+#if NET6_0_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ signer.BlockUpdate(hash);
+#else
+ signer.BlockUpdate(hash, 0, hash.Length);
+#endif
+ byte[] signature = signer.GenerateSignature();
+
+ signer.Init(false, keyPair.Public);
+ // NOTE: .NET Core 3.1 has Span<T>, but is tested against our .NET Standard 2.0 assembly.
+//#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+#if NET6_0_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ signer.BlockUpdate(hash);
+#else
+ signer.BlockUpdate(hash, 0, hash.Length);
+#endif
+ bool verified = signer.VerifySignature(signature);
+
+ Assert.IsTrue(verified);
+ }
+
+ private void doTestSig(
int id,
RsaKeyParameters pub,
RsaKeyParameters prv,
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