CKR_MECHANISM_INVALID when using CKM_ECDSA_SHA384

[sdalgic]

# Your system information

• Operating system used:Ubuntu 20.04
• PyKCS11 version: 1.5.12
• Python version: 3.6
• PKCS#11 library used: libsofthsm2.so and /lib64/libprocryptoki.so

# Please describe your issue in as much detail as possible:
Describe what you expected should happen.
While trying to sign a data by using CKM_ECDSA_SHA384 mechanism with soft hsm and also hard hsm, the same problem occurs.
signature = session.sign(priv_key, byte_data, Mechanism(CKM_ECDSA_SHA384, None))

Describe what did happen.
When sign method is executed, it returns below exception.
Exception : CKR_MECHANISM_INVALID (0x00000070)

# Steps for reproducing this issue:

1. Install SoftHSM
2. Import EC keys into SoftHSM
3. Sign data with CKM_ECDSA_SHA384 mechanism.

[LudovicRousseau]

SoftHSM v2 does not support CKM_ECDSA_SHA384, only CKM_ECDSA.
You can use getinfo.py to list all the supported mechanisms:

PYKCS11LIB=/usr/local/lib/softhsm/libsofthsm2.so samples/getinfo.py --mechanisms | grep CKM_ECDSA
   CKM_ECDSA 

I guess it the same with your /lib64/libprocryptoki.so.

If you can provide a working sample C code using SoftHSMv2 and CKM_ECDSA_SHA384 then I can re-consider this issue.