C_GetInterfaceList() returns unexpected values

[Jakuje]

While running the p11test from opensc with recent 2.7.0 update, the C_GetInterfaceList called with both NULL arguments returns unexpected return code CKR_SLOT_ID_INVALID , which is

100: C_GetInterfaceList                                
P:42801; T:0x140462040723456 2026-01-13 16:13:18.382   
Returned:  3 CKR_SLOT_ID_INVALID                       

This return code does not make any sense and is not among the list of return codes this function can return:

https://docs.oasis-open.org/pkcs11/pkcs11-spec/v3.2/pkcs11-spec-v3.2.html#_Toc195693132

[Jakuje]

Calling also with the first NULL argument results in the same error:

101: C_GetInterfaceList
P:47277; T:0x139890987114496 2026-01-13 16:25:58.417
Returned:  3 CKR_SLOT_ID_INVALID

while the specification clearly says that its valid use and it should return the count of interfaces provided by this module.

https://github.com/OpenSC/OpenSC/blob/master/src/tests/p11test/p11test_case_interface.c#L56

Please, fix the API to be up to the specs

[Jakuje]

Oh, this API is not yet implemented in softhsm, so it must be coming from the pkcs11-spy ... but clearly there is something odd going on, which was not there in the last version reelase.

[Jakuje]

oh, It looks like the GetFunctionList returns the API version 3, but not implementing the C_GetInterfaceList() API, which sounds like going against the specification.

In this structure ‘version’ is the cryptoki specification version number. The major and minor versions must be set to 0x02 and 0x28 indicating a version 2.40 compatible structure.

[bukka]

Yeah this should be added. I bumped the API version because of upcoming ML-DSA changes but forgot that this should be added.