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add 1mb scratchpad

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wowario
2025-09-23 17:09:05 +03:00
parent 1e4796868e
commit 6284d8a6c9
3 changed files with 30 additions and 1 deletions
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src/crypto/wbag-hash.c
+26 -1
View File
@@ -28,6 +28,10 @@ extern "C" {
#define WBAG_ROUNDS 32768u // number of rounds
#endif
#ifndef WBAG_SCRATCHPAD
#define WBAG_SCRATCHPAD (1u * 1024u * 1024u) // 1 MiB per-hash
#endif
#define WBAG_N_ENTRIES ( (WBAG_CACHE_BYTES / WBAG_ENTRY_BYTES) )
#ifndef WBAG_ARGON2_P
@@ -65,6 +69,9 @@ _Static_assert(WBAG_ARGON2_P == 2u, "WBAG requires Argon2 p=2");
#if (WBAG_ROUNDS > UINT32_MAX)
# error "WBAG_ROUNDS must be <= UINT32_MAX because the rounds counter is u32"
#endif
#if (WBAG_SCRATCHPAD % 8u) != 0
# error "WBAG_SCRATCH_PAD must be a multiple of 8"
#endif
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
_Static_assert(WBAG_ENTRY_BYTES >= 32, "entry must be >= 32");
@@ -218,7 +225,7 @@ int WBAG_hash(const void *bd, size_t bd_len, const uint8_t *cache, uint8_t out32
memcpy(buf + 1, bd, bd_len);
blake256_hash(st_bytes, buf, (uint64_t)(bd_len + 1));
// 2) State lanes + PRNG seed
// 2) State lanes + PRNG seed + scratchpad
uint64_t st64[4];
st64[0] = WBAG_load64_le(st_bytes + 0);
st64[1] = WBAG_load64_le(st_bytes + 8);
@@ -231,6 +238,17 @@ int WBAG_hash(const void *bd, size_t bd_len, const uint8_t *cache, uint8_t out32
s ^= st64[2]; s = WBAG_splitmix64(s);
s ^= st64[3]; s = WBAG_splitmix64(s);
uint8_t *scratchpad = (uint8_t*)malloc(WBAG_SCRATCHPAD);
if (!scratchpad) { free(buf); errno = ENOMEM; return -1; }
{
uint64_t q = st64[0] ^ st64[1] ^ st64[2] ^ st64[3] ^ 0x243F6A8885A308D3ULL;
for (size_t i = 0; i < WBAG_SCRATCHPAD/8; i++) {
q = WBAG_splitmix64(q);
WBAG_store64_le(scratchpad + 8*i, q);
}
}
const size_t smask = (WBAG_SCRATCHPAD/8u) - 1u;
// 3) Dependent random rounds
const size_t n_mask = (size_t)WBAG_N_ENTRIES - 1;
@@ -258,6 +276,11 @@ int WBAG_hash(const void *bd, size_t bd_len, const uint8_t *cache, uint8_t out32
st64[2] = WBAG_rotl64(x2 ^ (x0 + 0x9e3779b97f4a7c15ULL), 17);
st64[3] = WBAG_rotl64(x3 ^ (x1 + 0x94d049bb133111ebULL), 29);
size_t sidx = (size_t)((s >> 11) & (uint64_t)smask);
uint64_t v = WBAG_load64_le(scratchpad + (sidx * 8u));
st64[0] ^= v;
s ^= WBAG_rotl64(v, (unsigned)((s >> 23) & 63u));
size_t off = (size_t)((s >> 3) & (uint64_t)((size_t)WBAG_ENTRY_BYTES - 8));
uint64_t e = WBAG_load64_le(entry + off);
@@ -276,6 +299,7 @@ int WBAG_hash(const void *bd, size_t bd_len, const uint8_t *cache, uint8_t out32
memcpy(buf + (1 + 32), bd, bd_len);
groestl(buf, (1 + 32) + bd_len, out32);
free(scratchpad);
free(buf);
return 0;
}
@@ -285,6 +309,7 @@ size_t WBAG_cache_bytes(void) { return (size_t)WBAG_CACHE_BYTES; }
size_t WBAG_entry_bytes(void) { return (size_t)WBAG_ENTRY_BYTES; }
size_t WBAG_cache_entries(void) { return (size_t)WBAG_N_ENTRIES; }
size_t WBAG_rounds(void) { return (size_t)WBAG_ROUNDS; }
size_t WBAG_scratchpad(void) { return (size_t)WBAG_SCRATCHPAD; }
size_t WBAG_argon_p(void) { return (size_t)WBAG_ARGON2_P; }
size_t WBAG_argon_t(void) { return (size_t)WBAG_ARGON2_T; }
src/crypto/wbag-hash.h
+1
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@@ -20,6 +20,7 @@ size_t WBAG_cache_bytes(void);
size_t WBAG_entry_bytes(void);
size_t WBAG_cache_entries(void);
size_t WBAG_rounds(void);
size_t WBAG_scratchpad(void);
size_t WBAG_argon_p(void);
size_t WBAG_argon_t(void);
tests/hash/wbag_test.cpp
+3
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@@ -531,11 +531,14 @@ int wbag_test() {
const std::vector<uint8_t> block(80, 0x42);
const size_t cache_bytes = WBAG_cache_bytes();
const double cache_mb = static_cast<double>(cache_bytes) / (1024.0 * 1024.0);
const size_t sp_bytes = WBAG_scratchpad();
const double sp_mb = static_cast<double>(sp_bytes) / (1024.0 * 1024.0);
const int total = static_cast<int>(sizeof(k_wbag_anchor_samples) / sizeof(k_wbag_anchor_samples[0]));
std::cerr << "Params:"
<< " WBAG_CACHE_BYTES=" << cache_mb
<< ", WBAG_ENTRY_BYTES=" << WBAG_entry_bytes()
<< ", WBAG_SCRATCHPAD=" << sp_mb
<< ", WBAG_ROUNDS=" << WBAG_rounds()
<< ", WBAG_ARGON2_P=" << WBAG_argon_p()
<< ", WBAG_ARGON2_T=" << WBAG_argon_t();