Add testcase for RAW PKCS#1 signatures missing DER NULL

Author: peterdettman

crypto/crypto.csproj

@@ -7596,6 +7596,14 @@
                     RelPath = "test\data\cms\sigs\PSSSignDataSHA512Enc.sig"
                     BuildAction = "EmbeddedResource"
                 />
+                <File
+                    RelPath = "test\data\cms\sigs\rawsha256nonull.p7m"
+                    BuildAction = "EmbeddedResource"
+                />
+                <File
+                    RelPath = "test\data\cms\sigs\SignedMSPkcs7.sig"
+                    BuildAction = "EmbeddedResource"
+                />
                 <File
                     RelPath = "test\data\crypto\SHA3TestVectors.txt"
                     BuildAction = "EmbeddedResource"

crypto/test/UnitTests.csproj

@@ -1046,6 +1046,8 @@
     <EmbeddedResource Include="data\cms\sigs\PSSSignDataSHA512.sig" />
     <EmbeddedResource Include="data\cms\sigs\PSSSignDataSHA512Enc.sig" />
     <EmbeddedResource Include="data\cms\sigs\counterSig.p7m" />
+    <EmbeddedResource Include="data\cms\sigs\rawsha256nonull.p7m" />
+    <EmbeddedResource Include="data\cms\sigs\SignedMSPkcs7.sig" />
     <EmbeddedResource Include="data\hc256\hc128\ecrypt_HC-128.txt" />
     <EmbeddedResource Include="data\hc256\hc256\ecrypt_HC-256_128K_128IV.txt" />
     <EmbeddedResource Include="data\hc256\hc256\ecrypt_HC-256_128K_256IV.txt" />

crypto/test/data/cms/sigs/SignedMSPkcs7.sig

@@ -672,6 +672,24 @@ public void TestSha1WithRsaAndAttributeTable()
 			VerifySignatures(s, hash);
 		}
 
+        [Test]
+        public void TestRawSha256MissingNull()
+        {
+            byte[] document = GetInput("rawsha256nonull.p7m");
+
+            CmsSignedData s = new CmsSignedData(document);
+
+            IX509Store certStore = s.GetCertificates("Collection");
+            foreach (SignerInformation signerInformation in s.GetSignerInfos().GetSigners())
+            {
+                ICollection certCollection = certStore.GetMatches(signerInformation.SignerID);
+                foreach (X509Certificate cert in certCollection)
+                {
+                    Assert.IsTrue(signerInformation.Verify(cert), "raw sig failed");
+                }
+            }
+        }
+
 		[Test]
 		public void TestSha1WithRsaEncapsulated()
 		{