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Sync the AESNI aes_gcm_decrypt_generic() impl with the ARM one

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This commit is contained in:
Frank Denis 2022-12-11 23:47:46 +01:00
parent 8b9a98c47f
commit a5ea347381
1 changed files with 4 additions and 3 deletions
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7
src/libsodium/crypto_aead/aes256gcm/aesni/aead_aes256gcm_aesni.c
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@ -603,7 +603,7 @@ aes_gcm_decrypt_generic(const State *st, GHash *sth, unsigned char mac[ABYTES],
/* 2*PARALLEL_BLOCKS aggregation */
for (; i + 2 * PARALLEL_BLOCKS * 16 <= src_len; i += 2 * PARALLEL_BLOCKS * 16) {
while (i + 2 * PARALLEL_BLOCKS * 16 <= src_len) {
counter = incr_counters(rev_counters, counter, PARALLEL_BLOCKS);
u = gh_update0(sth, src + i, st->hx[2 * PARALLEL_BLOCKS - 1 - 0]);
@ -615,13 +615,14 @@ aes_gcm_decrypt_generic(const State *st, GHash *sth, unsigned char mac[ABYTES],
counter = incr_counters(rev_counters, counter, PARALLEL_BLOCKS);
i += PARALLEL_BLOCKS * 16;
for (j = 0; j < PARALLEL_BLOCKS; j += 1) {
gh_update(&u, src + i + j * 16, st->hx[PARALLEL_BLOCKS - 1 - j]);
}
sth->acc = gcm_reduce(u);
encrypt_xor_wide(st, dst + i + PARALLEL_BLOCKS * 16, src + i + PARALLEL_BLOCKS * 16,
rev_counters);
encrypt_xor_wide(st, dst + i, src + i, rev_counters);
i += PARALLEL_BLOCKS * 16;
}
/* PARALLEL_BLOCKS aggregation */