[Opensc-devel] SCM SCR 355 / EC:secp256r1/RSA-2048 keypair creation issues

[Ronny S. <Ron...@to...>]

Hi,

I'm trying to create a ECC keypair with self-signed certificate on a SCM SCR 355 (CardContact.de) using OpenSC 0.13.0 and OpenSSL 1.0.1 / enginePKCS11-0.1.8 under Ubuntu 12.04. 

$ pkcs11-tool --module /usr/lib/opensc-pkcs11.so --list-slots
Available slots:
Slot 0 (0xffffffffffffffff): Virtual hotplug slot
  (empty)
Slot 1 (0x1): SCM SCR 355 [CCID Interface] 00 00
  token label        : SmartCard-HSM (UserPIN)
  token manufacturer : www.CardContact.de
  token model        : PKCS#15 emulated
  token flags        : rng, login required, PIN initialized, token initialized
  hardware version   : 24.13
  firmware version   : 1.1
  serial num         : DECC0100157

When creating the EC keypair, I get an error concerning the public key:

$ pkcs11-tool --module /usr/lib/opensc-pkcs11.so --login --pin 725570 --keypairgen --key-type EC:secp256r1 --id 60 --label ca
Using slot 1 with a present token (0x1)
Key pair generated:
Private Key Object; EC
  label:      ca
  ID:         60
  Usage:      decrypt, sign, unwrap
Public Key Object; EC EC_POINT 264 bits
 EC_POINT:  0443044104df184902123186393e28e0673cf755352c8653eaf42224a54aa3ba0da987c2eb33f8380fc39b7417a1a5138d7ea696ea95f816935d63d7c7372772d11cfca37c
warning: PKCS11 function C_GetAttributeValue(EC_PARAMS) failed: rv = CKR_ATTRIBUTE_TYPE_INVALID (0x12)

  label:      ca
  ID:         60
  Usage:      encrypt, verify, wrap

And the public key isn't listed either

$ pkcs11-tool --module /usr/lib/opensc-pkcs11.so --slot 1 --login --pin 725570 --list-objects
Private Key Object; EC
  label:      ca
  ID:         60
  Usage:      decrypt, sign, unwrap

Now OpenSSL / req cannot find the private key for whatever reason.

$ openssl
OpenSSL> version
OpenSSL 1.0.1 14 Mar 2012
OpenSSL> engine -t dynamic -pre SO_PATH:/usr/lib/engines/engine_pkcs11.so -pre ID:pkcs11 -pre LIST_ADD:1 -pre LOAD -pre MODULE_PATH:/usr/lib/pkcs11/opensc-pkcs11.so -pre VERBOSE
(dynamic) Dynamic engine loading support
[Success]: SO_PATH:/usr/lib/engines/engine_pkcs11.so
[Success]: ID:pkcs11
[Success]: LIST_ADD:1
[Success]: LOAD
[Success]: MODULE_PATH:/usr/lib/pkcs11/opensc-pkcs11.so
[Success]: VERBOSE
Loaded: (pkcs11) pkcs11 engine
initializing engine
     [ available ]
OpenSSL> req -engine pkcs11 -new -key slot_1-id_60 -keyform engine -out req.pem -text -x509 -days 36500 -subj "/CN=TestCA"
initializing engine
engine "pkcs11" set.
Looking in slot 1 for key: 60
Found 2 slots
[18446744073709551615] Virtual hotplug slot       no tok          
[1] SCM SCR 355 [CCID Interfa  login             (SmartCard-HSM (UserPIN))
Found slot:  SCM SCR 355 [CCID Interface] 00 00
Found token: SmartCard-HSM (UserPIN)
Found 0 certificate:
PKCS#11 token PIN: 
No keys found.
PKCS11_get_private_key returned NULL
cannot load Private Key from engine
139838314968736:error:26096080:engine routines:ENGINE_load_private_key:failed loading private key:eng_pkey.c:126:
unable to load Private Key
error in req
OpenSSL>

The key pair creation + CSR request creation appears to work with RSA-1024, i.e. I don't get errors and I see private and public key on the token. However, when using RSA-2048, there is no error during key generation, but --list-objects doesn't show the public key either and openssl req fails to retrieve the private key as well.

$ pkcs11-tool --module /usr/lib/opensc-pkcs11.so --login --pin 725570 --keypairgen --key-type RSA:2048 --id 70 --label ca-rsa
Using slot 1 with a present token (0x1)
Key pair generated:
Private Key Object; RSA 
  label:      ca-rsa
  ID:         70
  Usage:      decrypt, sign, unwrap
Public Key Object; RSA 2048 bits
  label:      ca-rsa
  ID:         70
  Usage:      encrypt, verify, wrap
$ pkcs11-tool --module /usr/lib/opensc-pkcs11.so --slot 1 --login --pin 725570 --list-objects
Private Key Object; RSA 
  label:      ca-rsa
  ID:         70
  Usage:      decrypt, sign, unwrap
$ openssl
OpenSSL> engine -t dynamic -pre SO_PATH:/usr/lib/engines/engine_pkcs11.so -pre ID:pkcs11 -pre LIST_ADD:1 -pre LOAD -pre MODULE_PATH:/usr/lib/pkcs11/opensc-pkcs11.so -pre VERBOSE
(dynamic) Dynamic engine loading support
[Success]: SO_PATH:/usr/lib/engines/engine_pkcs11.so
[Success]: ID:pkcs11
[Success]: LIST_ADD:1
[Success]: LOAD
[Success]: MODULE_PATH:/usr/lib/pkcs11/opensc-pkcs11.so
[Success]: VERBOSE
Loaded: (pkcs11) pkcs11 engine
initializing engine
     [ available ]
OpenSSL> req -engine pkcs11 -new -key slot_1-id_70 -keyform engine -out req.pem -text -x509 -days 36500 -subj "/CN=TestCA"
initializing engine
engine "pkcs11" set.
Looking in slot 1 for key: 70
Found 2 slots
[18446744073709551615] Virtual hotplug slot       no tok          
[1] SCM SCR 355 [CCID Interfa  login             (SmartCard-HSM (UserPIN))
Found slot:  SCM SCR 355 [CCID Interface] 00 00
Found token: SmartCard-HSM (UserPIN)
Found 0 certificate:
PKCS#11 token PIN: 
Found 1 key:
   1 P  ca-rsa
PKCS11_get_private_key returned NULL
cannot load Private Key from engine
140210187540128:error:80028012:PKCS11 library:PKCS11_get_attribute:Attribute type invalid:p11_attr.c:53:
140210187540128:error:26096080:engine routines:ENGINE_load_private_key:failed loading private key:eng_pkey.c:126:
unable to load Private Key
error in req
OpenSSL>

I'm a bit lost ... Is there anything wrong in the parameters? Is there any workaround to create a proper key pair on the token?

Thanks & Best regards,
Ronny