How to enum CSPs in C#?

[mRbEn]

Hi:
I'm trying to write a web page by using c# under dotnet framwork. My target
is lets the user to choose a csp to get a certificate from CA. But, I only
know how to enum providers by cryptoapi like: CryptEnumProviders(...).
Who can tell me how to enum csps by using C#?
thanks

 

[Guest]

There is no reason you cannot use the existing CryptEnumProviders() call,
you’d just need to P/Invoke it and lucky for you, recently Nicholas Paldino
posted a C# signature for it over on
http://pinvoke.net/default.aspx/advapi32/CryptEnumProviders.html

Brendan

 

[Nicholas Paldino [.NET/C# MVP]]

Brendan,

That's pretty funky. How did you know it was me who posted it? =)

 

[mRbEn]

thanks!

There is no reason you cannot use the existing CryptEnumProviders() call,
you¡¯d just need to P/Invoke it and lucky for you, recently Nicholas Paldino
posted a C# signature for it over on
http://pinvoke.net/default.aspx/advapi32/CryptEnumProviders.html

Brendan

 

[mRbEn]

one more question!
When I call the cryptenumproviders in my C# project. I got an error it's
said that the module could not be found. Why can't my project load
advapi32.dll and find the module CryptEnumProviders ? !!!

 

[Nicholas Paldino [.NET/C# MVP]]

mRbEn,

What does the declaration in your code look like? You arent setting a
reference to advapi32.dll, are you?

 

[mRbEn]

I do think so, too. But I don't know how to reference to it.It's seemed I
can't reference to it by using the reference windows in my project.
BTW, APIs imported from User32 and Kenerl32 are worked well.

[DllImport("user32.dll", EntryPoint="MessageBox")]
public static extern int MsgBox(int hWnd, String text, String caption,
uint type);
above is right.

[DllImport("Advapi32", EntryPoint="CryptEnumProvidersW",
SetLastError=true, ExactSpelling=true,
CharSet=CharSet.Auto)]
static extern bool CryptEnumProviders(
[MarshalAs(UnmanagedType.U4)] int dwIndex,
[MarshalAs(UnmanagedType.U4)] ref int pdwReserved,
[MarshalAs(UnmanagedType.U4)] int dwFlags,
[MarshalAs(UnmanagedType.U4)] ref int pdwProvType,
StringBuilder pszProvName,
[MarshalAs(UnmanagedType.U4)] ref int pcbProvName);
above is wrong.
errcode=126 ERROR_MOD_NOT_FOUND
The specified module could not be found.

mRbEn,

What does the declaration in your code look like? You arent setting a
reference to advapi32.dll, are you?


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

one more question!
When I call the cryptenumproviders in my C# project. I got an error it's
said that the module could not be found. Why can't my project load
advapi32.dll and find the module CryptEnumProviders ? !!!