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.
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
#ifndef SPX_WOTS_H
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#define SPX_WOTS_H
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#include "params.h"
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#include "primitive.h"
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#include <stdint.h>
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/**
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* WOTS key generation. Takes a 32 byte seed for the private key, expands it to
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* a full WOTS private key and computes the corresponding public key.
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* It requires the seed pub_seed (used to generate bitmasks and hash keys)
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* and the address of this WOTS key pair.
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*
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* Writes the computed public key to 'pk'.
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*/
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void PQCLEAN_SPHINCSSHAKE256256SROBUST_CLEAN_wots_gen_pk(
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unsigned char *pk, const unsigned char *sk_seed,
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const unsigned char *pub_seed, uint32_t addr[8],
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hash_state *state_seeded);
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/**
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* Takes a n-byte message and the 32-byte seed for the private key to compute a
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* signature that is placed at 'sig'.
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*/
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void PQCLEAN_SPHINCSSHAKE256256SROBUST_CLEAN_wots_sign(
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unsigned char *sig, const unsigned char *msg,
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const unsigned char *sk_seed, const unsigned char *pub_seed,
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uint32_t addr[8], hash_state *state_seeded);
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/**
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* Takes a WOTS signature and an n-byte message, computes a WOTS public key.
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*
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* Writes the computed public key to 'pk'.
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*/
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void PQCLEAN_SPHINCSSHAKE256256SROBUST_CLEAN_wots_pk_from_sig(
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unsigned char *pk,
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const unsigned char *sig, const unsigned char *msg,
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const unsigned char *pub_seed, uint32_t addr[8],
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hash_state *state_seeded);
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#endif
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