CryptoAPI - CryptoSetProvParam

[ekpai]

Hi everyone,

I am quite newbie in security development. So sorry in advance if u feel i am asking something obvious. I am trying to login into a USB token
from Aladdin. I am using the below code but I am getting all the time an error in the CryptSetProvPar am. I do not know why i cannot login into
the token. What is wrong in my code?

The vendor doc says that pbData should be an ASCII null terminating string so I ave also tried with passwd "1234567890 \0"

Also, is there a way to change the password?

Thanks a lot in advance,
Diego

byte[] bytes = Encoding.ASCII. GetBytes("12345 67890");
if (PAOLibToken.Cr yptAcquireConte xt(ref cspHandle, null, provName, PROV_RSA_FULL, CRYPT_VERIFYCON TEXT))
{
if (PAOLibToken.Cr yptSetProvParam (cspHandle, PP_KEYEXCHANGE_ PIN, bytes, 0) == true)
{
Console.WriteLi ne("OK");
}
}

///The DllImport Section
[DllImport("adva pi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
[return: MarshalAs(Unman agedType.Bool)]
static extern bool CryptAcquireCon text(ref IntPtr hProv, string pszContainer,
string pszProvider, uint dwProvType, uint dwFlags);

[DllImport("adva pi32.dll", SetLastError = true)]
public static extern bool CryptSetProvPar am(IntPtr hProv, uint dwParam, [In] byte[] pbData, uint dwFlags);