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hs_pow: use the compiled HashX implementation

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Much faster per-hash, affects both verify and solve.
Only implemented on x86_64 and aarch64, other platforms
always use the interpreted version of hashx.

Signed-off-by: Micah Elizabeth Scott <beth@torproject.org>
This commit is contained in:
Micah Elizabeth Scott 2023-03-10 17:23:06 -08:00
parent c6b168e141
commit 3129910b11
1 changed files with 26 additions and 3 deletions
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29
src/feature/hs/hs_pow.c
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@ -75,6 +75,23 @@ increment_and_set_nonce(uint128_t *nonce, uint8_t *challenge)
memcpy(challenge + HS_POW_SEED_LEN, nonce, HS_POW_NONCE_LEN);
}
/* Helper: Allocate an EquiX context, using the much faster compiled
* implementation of hashx if it's available on this architecture. */
static equix_ctx *
build_equix_ctx(equix_ctx_flags flags)
{
equix_ctx *ctx = equix_alloc(flags | EQUIX_CTX_COMPILE);
if (ctx == EQUIX_NOTSUPP) {
ctx = equix_alloc(flags);
}
tor_assert_nonfatal(ctx != EQUIX_NOTSUPP);
tor_assert_nonfatal(ctx != NULL);
if (ctx == EQUIX_NOTSUPP) {
ctx = NULL;
}
return ctx;
}
/* Helper: Build EquiX challenge (C || N || INT_32(E)) and return a newly
* allocated buffer containing it. */
static uint8_t *
@ -145,7 +162,10 @@ hs_pow_solve(const hs_pow_desc_params_t *pow_params,
/* Build EquiX challenge (C || N || INT_32(E)). */
challenge = build_equix_challenge(pow_params->seed, nonce, effort);
ctx = equix_alloc(EQUIX_CTX_SOLVE);
ctx = build_equix_ctx(EQUIX_CTX_SOLVE);
if (!ctx) {
goto end;
}
equix_solution solutions[EQUIX_MAX_SOLS];
log_notice(LD_REND, "Solving proof of work (effort %u)", effort);
@ -239,9 +259,12 @@ hs_pow_verify(const hs_pow_service_state_t *pow_state,
goto done;
}
/* Fail if equix_verify(C || N || E, S) != EQUIX_OK */
ctx = equix_alloc(EQUIX_CTX_SOLVE);
ctx = build_equix_ctx(EQUIX_CTX_VERIFY);
if (!ctx) {
goto done;
}
/* Fail if equix_verify(C || N || E, S) != EQUIX_OK */
equix_result result = equix_verify(ctx, challenge, HS_POW_CHALLENGE_LEN,
&pow_solution->equix_solution);
if (result != EQUIX_OK) {