From 96ac321da76ceda894adbb7d9a506b1fb256e207 Mon Sep 17 00:00:00 2001
From: Aki Tuomi <cmouse@cmouse.fi>
Date: Sun, 29 Mar 2015 18:57:23 +0300
Subject: [PATCH] Ask for all slots before asking for slot

OpenSC with certain card(s) requires this call to make slots
visible.
---
 pdns/pkcs11signers.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pdns/pkcs11signers.cc b/pdns/pkcs11signers.cc
index 52bc44616f..fababbcd4e 100644
--- a/pdns/pkcs11signers.cc
+++ b/pdns/pkcs11signers.cc
@@ -643,6 +643,11 @@ boost::shared_ptr<Pkcs11Token> Pkcs11Token::GetToken(const std::string& module,
    _CK_SLOT_INFO info;
   unsigned long slots;
 
+  // this is required by certain tokens, otherwise C_GetSlotInfo will not return a token
+  err = functions->C_GetSlotList(CK_FALSE, NULL_PTR, &slots);
+  if (err)
+    L<<Logger::Warning<<"C_GetSlotList(CK_FALSE, NULL_PTR, &slots) = " << err << std::endl;
+
   if ((err = functions->C_GetSlotInfo(slotId, &info))) {
     throw PDNSException(std::string("Cannot find PKCS#11 slot ") + boost::lexical_cast<std::string>(slotId) + std::string(" on module ") + module + std::string(": error code ") + boost::lexical_cast<std::string>(err));
   }
-- 
2.47.2