static bool WriteCredential(string targetName, string userName, string password)
{
if (targetName == null)
{
throw new ArgumentNullException("targetName");
}
if (userName == null)
{
throw new ArgumentNullException("userName");
}
if (password == null)
{
throw new ArgumentNullException("password");
}
var passwordBytes = Encoding.Unicode.GetBytes(password);
if (passwordBytes.Length > 512)
{
throw new ArgumentException("The secret message has exceeded 512 bytes.");
}
// Go ahead with what we have are stuff it into the CredMan structures.
var cred = new Credential {
TargetName = targetName,
CredentialBlob = password,
CredentialBlobSize = (UInt32)passwordBytes.Length,
AttributeCount = 0,
Attributes = IntPtr.Zero,
Comment = null,
TargetAlias = null,
Type = NativeCredentialType.Generic,
Persist = PersistFlags.LocalMachine,
UserName = userName,
};
var ncred = NativeCredential.GetNativeCredential(cred);
// Write the info into the CredMan storage.
var didWrite = NativeMethods.CredWrite(ref ncred, 0);
Marshal.FreeCoTaskMem(ncred.TargetName);
Marshal.FreeCoTaskMem(ncred.CredentialBlob);
Marshal.FreeCoTaskMem(ncred.UserName);
return(didWrite);
}
internal static extern bool CredWrite([In] ref NativeCredential credential, [In] uint flags);
