[Mono-list] Problem using p/invoke on mono 1.0.1

[DI Mag. Rainer Burgstaller]

Hi

First of all here is my configuration

Debian testing (quite up to date)
Mono-1.0.1 (got the mono-1.0.1.tar.gz)


I am trying to use libcrypt.so.2.3.2 with c#. This code has been working 
for quite a while but stopped to work now.

here is a little sample program I wrote

<snip>
using System;
using System.Text;
using System.Security.Cryptography;
using System.Web.Security;
using System.Runtime.InteropServices;



namespace CryptTest
{
     class CryptTest
         {
         [DllImport ("crypt", EntryPoint="crypt", SetLastError=true)]
         private static extern string UnixCrypt(string text, string salt);

         [STAThread]
         static void Main(string[] args)
             {
             Console.WriteLine("have {0} args",args.Length);
             string arg = args[0];
             Console.WriteLine("UnixEncrypting {0} : 
{1}",arg,UnixCrypt(arg,arg));
         }
     }
}
</snip>

When I try to run this with

mono encrypt.exe rainer

I get a NullReference Exception. I am a bit lost here since this code has 
been working beautifully for months. Either my debian upgraded its 
libcrypt version (which could easily be true) or upgrading to mono-1.0.1 
introduced the problem (which is less likely since I remember having the 
same issue on mono-1.0).

Here is a snipped of the trace

.. . ENTER: (wrapper managed-to-native) PerfTest.PerfTest:UnixCrypt 
(string,string)([STRING:0x80f8fc0:rainer], [STRING:0x80f8fc0:rainer], )
.. . . ENTER: (wrapper managed-to-native) 
System.Object:__icall_wrapper_mono_string_to_utf8 
(object)([STRING:0x80f8fc0:rainer], )
.. . . LEAVE: (wrapper managed-to-native) 
System.Object:__icall_wrapper_mono_string_to_utf8 (object)result=135946400
.. . . ENTER: (wrapper managed-to-native) 
System.Object:__icall_wrapper_mono_string_to_utf8 
(object)([STRING:0x80f8fc0:rainer], )
.. . . LEAVE: (wrapper managed-to-native) 
System.Object:__icall_wrapper_mono_string_to_utf8 (object)result=135941976
.. . . ENTER: (wrapper managed-to-native) 
System.Object:__icall_wrapper_mono_string_new_wrapper (intptr)(0x41350540, 
)
.. . . LEAVE: (wrapper managed-to-native) 
System.Object:__icall_wrapper_mono_string_new_wrapper 
(intptr)[System.String:0x80ef988]
.. . . ENTER: (wrapper managed-to-native) 
System.Object:__icall_wrapper_g_free (intptr)(0x41350540, )
.. . . . ENTER: (wrapper runtime-invoke) System.Object:runtime_invoke_void 
(object,intptr,intptr,intptr)([System.NullReferenceException:0x80f07b0], 
(nil), (nil
), 0x413583d8, )
.. . . . . ENTER: System.NullReferenceException:.ctor 
()(this:0x80f07b0[System.NullReferenceException encrypt.exe], )
.. . . . . . ENTER: Locale:GetText (string)([STRING:0x80f3c78:A null value 
was found where an object instance was required.], )
.. . . . . . LEAVE: Locale:GetText (string)[STRING:0x80f3c78:A null value 
was found where an object instance was required.]
.. . . . . LEAVE: System.NullReferenceException:.ctor ()
.. . . . LEAVE: (wrapper runtime-invoke) System.Object:runtime_invoke_void 
(object,intptr,intptr,intptr)[OBJECT:(nil)]
EXCEPTION handling: NullReferenceException



I checked /usr/include/crypt.h again to make sure that there is not a new 
version with different headers. But the function is still here

here is a snip of crypt.h
<snip>
/* Encrypt at most 8 characters from KEY using salt to perturb DES.  */
extern char *crypt (__const char *__key, __const char *__salt) __THROW;
</snip>

so to me everything looks still fine but still it does not work.

Can anyone help?