This commit fixes various bugs that I've noticed on some windows systems with
smartcards that contains multiple certificates:
* With some drivers if you retrieve the ATR while enumerating the NCrypt keys, it seems to
confuse the NCrypt key context (and you're unable to retrieve certificate property). As
we don't use the ATR, let's remove the ATR retrieval.
* if don't give any user or domain on the command line, in settings you get User=Domain=NULL,
but if you pass /u:user, you get User="user" and Domain = ""(empty string not NULL). The
smartcard filtering by user/domain was not ready for that.
This patch adds the NCryptEnumStorageProviders function.
It also fixes strings bugs with the compiler taking the WCHAR "Micro" string
M\x00i\x00c\x00r\x00o\x00 as
M\x00i\x0c\x00r\x00o\x00, and so generating unexpected behaviours. The solution is
to split string constants when you hit a character that is a valid hex number, so
that the compiler doesn't interpret i\x00c\x00 (ic in WCHARs) as i\x0c\x00 (weird
string).
This implements the emulation for the ncrypt API and more specifically the smartcard
provider so that we can list available keys and certificates using pkcs11-helper.
