This commit introduces the necessary changes to crypto.h in preparation
for implementing Argon2 support via the generic KDF functions, _gcry_kdf_*():
- add new GPG error types required by kdf.c,
- declare _gcry_digest_spec_blake2b_512 to enable BLAKE2b-512 digest calculations,
- define the gcrypt KDF algorithm IDs for Argon2,
- add the prototypes of _gcry_kdf_*() functions.
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
bc94dfd541