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better error handling in crypto_data_hkdf/4

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Noted by @notoria in #533. Many thanks!
This commit is contained in:
Markus Triska
2020-05-19 18:21:07 +02:00
parent d19d8ea770
commit dec2ef70c7
1 changed files with 7 additions and 0 deletions
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7
src/prolog/lib/crypto.pl
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@@ -258,6 +258,9 @@ hash_algorithm(blake2b512).
crypto_data_hkdf(Data0, L, Bytes, Options0) :-
functor_hash_options(algorithm, Algorithm, Options0, Options),
( hkdf_algorithm(Algorithm) -> true
; domain_error(hkdf_algorithm, Algorithm, crypto_data_hkdf/4)
),
must_be(integer, L),
L >= 0,
options_data_bytes(Options, Data0, Data),
@@ -267,6 +270,10 @@ crypto_data_hkdf(Data0, L, Bytes, Options0) :-
chars_bytes_(Info0, Info, crypto_data_hkdf/4),
'$crypto_data_hkdf'(Data, SaltBytes, Info, Algorithm, L, Bytes).
hkdf_algorithm(sha256).
hkdf_algorithm(sha384).
hkdf_algorithm(sha512).
option(What, Options, Default) :-
( member(V, Options), var(V) ->
instantiation_error(option/3)