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aa4611a4d1
This PR sacrifices passing some extra arguments to get rid of the global state. * Haraka needs state in all hash calls, this results in changes to the hash functions specified in `hash.h`. The extra pointers passed would not be necessary for SHA256 or SHAKE256. * SHAKE256 did not have global state, but uniformity in the implementations requires us to pass around the new state context anyway. Otherwise, @joostrijneveld's SPHINCS+ generator doesn't really work anymore). We introduce a new header file called `primitive.h` which defines the required state type for the generic functions. I did not go into replacing _all_ occurrences of state variables by the new `hash_state` macro.
33 lines
1.1 KiB
C
33 lines
1.1 KiB
C
#ifndef SPX_FORS_H
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#define SPX_FORS_H
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#include <stdint.h>
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#include "params.h"
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#include "primitive.h"
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/**
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* Signs a message m, deriving the secret key from sk_seed and the FTS address.
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* Assumes m contains at least SPX_FORS_HEIGHT * SPX_FORS_TREES bits.
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*/
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void PQCLEAN_SPHINCSSHAKE256256SSIMPLE_CLEAN_fors_sign(
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unsigned char *sig, unsigned char *pk,
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const unsigned char *m,
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const unsigned char *sk_seed, const unsigned char *pub_seed,
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const uint32_t fors_addr[8], hash_state *state_seeded);
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/**
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* Derives the FORS public key from a signature.
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* This can be used for verification by comparing to a known public key, or to
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* subsequently verify a signature on the derived public key. The latter is the
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* typical use-case when used as an FTS below an OTS in a hypertree.
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* Assumes m contains at least SPX_FORS_HEIGHT * SPX_FORS_TREES bits.
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*/
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void PQCLEAN_SPHINCSSHAKE256256SSIMPLE_CLEAN_fors_pk_from_sig(
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unsigned char *pk,
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const unsigned char *sig, const unsigned char *m,
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const unsigned char *pub_seed, const uint32_t fors_addr[8],
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hash_state *state_seeded);
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#endif
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