CKM_SHA256_HMAC
TIP Some mechanisms in this collection have both a "general" variant and a similarly named variant without "general" in the name. Per the PKCS#11 specification the _GENERAL variant of mechanism accepts a mechanism parameter that is used to define the length of the signature that is returned. The length can typically be any value between 1 and the length of the underlying HASH algorithm.
The variants without _GENERAL do not accept any mechanism parameters and always return a fixed length signature; where the length is defined by the underlying HASH algorithm.
Firmware 7.8.1 and Newer Summary
Luna HSM Firmware 7.8.1 and newer supports zero-byte input to HMAC functions.
| FIPS approved? | Yes |
| Supported functions | Sign | Verify |
| Functions restricted from FIPS use | None |
| Minimum key length (bits) | 8 |
| Minimum key length for FIPS use (bits) | 112 |
| Minimum legacy key length for FIPS use (bits) | 80 |
| Maximum key length (bits) | 4096 |
| Block size | 64 |
| Digest size | 32 |
| Key types | Symmetric |
| Algorithms | SHA256 |
| Modes | HMAC |
| Flags | Extractable | Allow zero-length input |
Firmware 7.8.0 and Older Summary
| FIPS approved? | Yes |
| Supported functions | Sign | Verify |
| Functions restricted from FIPS use | None |
| Minimum key length (bits) | 8 |
| Minimum key length for FIPS use (bits) | 112 |
| Minimum legacy key length for FIPS use (bits) | 80 |
| Maximum key length (bits) | 4096 |
| Block size | 64 |
| Digest size | 32 |
| Key types | Symmetric |
| Algorithms | SHA256 |
| Modes | HMAC |
| Flags | Extractable |
