[Mono-bugs] [Bug 79320][Nor] New - RSACryptoServiceProvider.Decrypt() could return null

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Changed by atsushi at ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=79320

--- shadow/79320	2006-09-08 07:52:52.000000000 -0400
+++ shadow/79320.tmp.4784	2006-09-08 07:52:52.000000000 -0400
@@ -0,0 +1,70 @@
+Bug#: 79320
+Product: Mono: Class Libraries
+Version: 1.1
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: CORLIB
+AssignedTo: sebastien at ximian.com                            
+ReportedBy: atsushi at ximian.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: RSACryptoServiceProvider.Decrypt() could return null
+
+With the following example code, RSACryptoServiceProvider returns null
+while it would be expected to raise an error as the encrypted bytes would
+be invalid.
+
+using System;
+using System.Security.Cryptography;
+using System.Security.Cryptography.X509Certificates;
+using System.Security.Cryptography.Xml;
+using System.Xml;
+
+public class Test
+{
+        public static void Main ()
+        {
+                string s = @"
+                        hdphq/mn8goBi43YGPkmOfPj5vXjHrKPJkT4mLT3l+XzLttHMLC4
+                        /yBYkuzlXtbrl2jtAJRb6oA8UcQFalUMnCa09LDZrgNU2yySn7Yb
+                        iG8raSq7u2nfDCbPu+c8T9fyHxrCHrX0zeqqImX33csIn6rIrQZ8
+                        HKcMsoQso4qtS2A=";
+                byte [] bytes = Convert.FromBase64String (s);
+                X509Certificate2 cert =
+                        new X509Certificate2 ("test.pfx", "mono");
+                RSACryptoServiceProvider r =
+                        (RSACryptoServiceProvider) cert.PrivateKey;
+                Console.WriteLine (r.Decrypt (bytes, true) == null);
+        }
+}
+
+
+Actual Results:
+
+It prints true i.e. Decrypt() returns null.
+
+Expected Results:
+
+something like below (.NET result):
+
+Unhandled Exception: System.Security.Cryptography.CryptographicException:
+Error occurred while decoding OAEP padding.
+   at System.Security.Cryptography.Utils._DecryptPKWin2KEnh(SafeKeyHandle
+hPubKey, Byte[] key, Boolean fOAEP, Int32& hr)
+   at System.Security.Cryptography.RSACryptoServiceProvider.Decrypt(Byte[]
+rgb, Boolean fOAEP)
+   at Test.Main()
+
+How often does this happen? 
+
+consistently.
+
+Additional Information:
+
+the certificate used in the example follows.