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Use 2-stage Merkle Tree hashing for parallel hashes for better crypto properties.

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Update xxhash comment.
This commit is contained in:
Moinak Ghosh 2013-02-01 22:07:28 +05:30
parent af4c6e1d84
commit 6bfd044311
3 changed files with 323 additions and 139 deletions
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304
crypto/sha2_utils.c
View file

@ -30,9 +30,21 @@
#endif #endif
#include <utils.h> #include <utils.h>
#define BLKSZ (2048)
/* /*
* Helper functions for single-call SHA2 hashing. Both serial and * Helper functions for single-call SHA2 hashing. Both serial and
* parallel versions are provided. * parallel versions are provided. Parallel versions use 2-stage
* Merkle Tree hashing.
*
* At the leaf level data is split into BLKSZ blocks and 4 threads
* compute 4 hashes of interleaved block streams. At 2nd level two
* new hashes are generated from hashing the 2 pairs of hash values.
* In the final stage the 2 hash values are hashed to the final digest.
*
* References:
* http://eprint.iacr.org/2012/476.pdf
* http://gva.noekeon.org/papers/bdpv09tree.html
*/ */
void void
ossl_SHA256(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes) ossl_SHA256(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
@ -47,44 +59,64 @@ ossl_SHA256(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
void void
ossl_SHA256_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes) ossl_SHA256_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
{ {
uchar_t *pos[2]; uchar_t cksum[6][32];
uint64_t len[2]; SHA256_CTX ctx[4];
uchar_t cksum[2][32]; int i, rem;
int i; uint64_t _bytes;
SHA256_CTX *mctx;
/* /*
* Is it worth doing the overhead of parallelism ? Buffer large enough ? * Is it worth doing the overhead of parallelism ? Buffer large enough ?
* If not then just do a simple serial hashing. * If not then just do a simple serial hashing.
*/ */
if (bytes / 2 <= SHA512_BLOCK_SIZE * 4) { if (bytes <= BLKSZ * 2) {
mctx = (SHA256_CTX *)malloc(sizeof (SHA256_CTX)); SHA256_Init(&ctx[0]);
SHA256_Init(mctx); SHA256_Update(&ctx[0], buf, bytes);
SHA256_Update(mctx, buf, bytes); SHA256_Final(cksum_buf, &ctx[0]);
SHA256_Final(cksum_buf, mctx);
free(mctx);
return; return;
} }
pos[0] = buf;
len[0] = bytes/2; /*
buf += bytes/2; * Do first level hashes in parallel.
pos[1] = buf; */
len[1] = bytes - bytes/2; _bytes = (bytes / BLKSZ) * BLKSZ;
rem = bytes - _bytes;
#if defined(_OPENMP) #if defined(_OPENMP)
# pragma omp parallel for # pragma omp parallel for
#endif #endif
for(i = 0; i < 2; ++i) for(i = 0; i < 4; ++i)
{ {
SHA256_CTX ctx; uint64_t byt;
SHA256_Init(&ctx);
SHA256_Update(&ctx, pos[i], len[i]); byt = i * BLKSZ;
SHA256_Final(cksum[i], &ctx); SHA256_Init(&ctx[i]);
while (byt < _bytes) {
SHA256_Update(&ctx[i], buf + byt, BLKSZ);
byt += 4 * BLKSZ;
}
if (i>0)
SHA256_Final(cksum[i], &ctx[i]);
} }
mctx = (SHA256_CTX *)malloc(sizeof (SHA256_CTX)); if (rem > 0) {
SHA256_Init(mctx); SHA256_Update(&ctx[0], buf + bytes - rem, rem);
SHA256_Update(mctx, cksum, 2 * 32); }
SHA256_Final(cksum_buf, mctx); SHA256_Final(cksum[0], &ctx[0]);
free(mctx);
/*
* Second level hashes.
*/
SHA256_Init(&ctx[0]);
SHA256_Init(&ctx[1]);
SHA256_Update(&ctx[0], &cksum[0], 2 * 32);
SHA256_Update(&ctx[1], &cksum[1], 2 * 32);
SHA256_Final(cksum[4], &ctx[0]);
SHA256_Final(cksum[5], &ctx[1]);
/*
* Final hash.
*/
SHA256_Init(&ctx[0]);
SHA256_Update(&ctx[0], &cksum[4], 2 * 32);
SHA256_Final(cksum_buf, &ctx[0]);
} }
void void
@ -100,43 +132,64 @@ ossl_SHA512(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
void void
ossl_SHA512_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes) ossl_SHA512_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
{ {
uchar_t *pos[2]; uchar_t cksum[6][32];
uint64_t len[2]; SHA512_CTX ctx[4];
uchar_t cksum[2][64]; int i, rem;
int i; uint64_t _bytes;
SHA512_CTX *mctx;
/* /*
* Is it worth doing the overhead of parallelism ? Buffer large enough ? * Is it worth doing the overhead of parallelism ? Buffer large enough ?
* If not then just do a simple hashing. * If not then just do a simple serial hashing.
*/ */
if (bytes / 2 <= SHA512_BLOCK_SIZE * 4) { if (bytes <= BLKSZ * 2) {
mctx = (SHA512_CTX *)malloc(sizeof (SHA512_CTX)); SHA512_Init(&ctx[0]);
SHA512_Init(mctx); SHA512_Update(&ctx[0], buf, bytes);
SHA512_Update(mctx, buf, bytes); SHA512_Final(cksum_buf, &ctx[0]);
SHA512_Final(cksum_buf, mctx);
free(mctx);
return; return;
} }
pos[0] = buf;
len[0] = bytes/2; /*
pos[1] = buf + bytes/2; * Do first level hashes in parallel.
len[1] = bytes - bytes/2; */
_bytes = (bytes / BLKSZ) * BLKSZ;
rem = bytes - _bytes;
#if defined(_OPENMP) #if defined(_OPENMP)
# pragma omp parallel for # pragma omp parallel for
#endif #endif
for(i = 0; i < 2; ++i) for(i = 0; i < 4; ++i)
{ {
SHA512_CTX ctx; uint64_t byt;
SHA512_Init(&ctx);
SHA512_Update(&ctx, pos[i], len[i]); byt = i * BLKSZ;
SHA512_Final(cksum[i], &ctx); SHA512_Init(&ctx[i]);
while (byt < _bytes) {
SHA512_Update(&ctx[i], buf + byt, BLKSZ);
byt += 4 * BLKSZ;
}
if (i>0)
SHA512_Final(cksum[i], &ctx[i]);
} }
mctx = (SHA512_CTX *)malloc(sizeof (SHA512_CTX)); if (rem > 0) {
SHA512_Init(mctx); SHA512_Update(&ctx[0], buf + bytes - rem, rem);
SHA512_Update(mctx, cksum, 2 * 64); }
SHA512_Final(cksum_buf, mctx); SHA512_Final(cksum[0], &ctx[0]);
free(mctx);
/*
* Second level hashes.
*/
SHA512_Init(&ctx[0]);
SHA512_Init(&ctx[1]);
SHA512_Update(&ctx[0], &cksum[0], 2 * 32);
SHA512_Update(&ctx[1], &cksum[1], 2 * 32);
SHA512_Final(cksum[4], &ctx[0]);
SHA512_Final(cksum[5], &ctx[1]);
/*
* Final hash.
*/
SHA512_Init(&ctx[0]);
SHA512_Update(&ctx[0], &cksum[4], 2 * 32);
SHA512_Final(cksum_buf, &ctx[0]);
} }
void void
@ -152,43 +205,64 @@ opt_SHA512t256(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
void void
opt_SHA512t256_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes) opt_SHA512t256_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
{ {
uchar_t *pos[2]; uchar_t cksum[6][32];
uint64_t len[2]; SHA512_Context ctx[4];
uchar_t cksum[2][32]; int i, rem;
int i; uint64_t _bytes;
SHA512_Context *mctx;
/* /*
* Is it worth doing the overhead of parallelism ? Buffer large enough ? * Is it worth doing the overhead of parallelism ? Buffer large enough ?
* If not then just do a simple serial hashing. * If not then just do a simple serial hashing.
*/ */
if (bytes / 2 <= SHA512_BLOCK_SIZE * 4) { if (bytes <= BLKSZ * 2) {
mctx = (SHA512_Context *)malloc(sizeof (SHA512_Context)); opt_SHA512t256_Init(&ctx[0]);
opt_SHA512t256_Init(mctx); opt_SHA512t256_Update(&ctx[0], buf, bytes);
opt_SHA512t256_Update(mctx, buf, bytes); opt_SHA512t256_Final(&ctx[0], cksum_buf);
opt_SHA512t256_Final(mctx, cksum_buf);
free(mctx);
return; return;
} }
pos[0] = buf;
len[0] = bytes/2; /*
pos[1] = buf + bytes/2; * Do first level hashes in parallel.
len[1] = bytes - bytes/2; */
_bytes = (bytes / BLKSZ) * BLKSZ;
rem = bytes - _bytes;
#if defined(_OPENMP) #if defined(_OPENMP)
# pragma omp parallel for # pragma omp parallel for
#endif #endif
for(i = 0; i < 2; ++i) for(i = 0; i < 4; ++i)
{ {
SHA512_Context ctx; uint64_t byt;
opt_SHA512t256_Init(&ctx);
opt_SHA512t256_Update(&ctx, pos[i], len[i]); byt = i * BLKSZ;
opt_SHA512t256_Final(&ctx, cksum[i]); opt_SHA512t256_Init(&ctx[i]);
while (byt < _bytes) {
opt_SHA512t256_Update(&ctx[i], buf + byt, BLKSZ);
byt += 4 * BLKSZ;
}
if (i>0)
opt_SHA512t256_Final(&ctx[i], cksum[i]);
} }
mctx = (SHA512_Context *)malloc(sizeof (SHA512_Context)); if (rem > 0) {
opt_SHA512t256_Init(mctx); opt_SHA512t256_Update(&ctx[0], buf + bytes - rem, rem);
opt_SHA512t256_Update(mctx, cksum, 2 * 32); }
opt_SHA512t256_Final(mctx, cksum_buf); opt_SHA512t256_Final(&ctx[0], cksum[0]);
free(mctx);
/*
* Second level hashes.
*/
opt_SHA512t256_Init(&ctx[0]);
opt_SHA512t256_Init(&ctx[1]);
opt_SHA512t256_Update(&ctx[0], &cksum[0], 2 * 32);
opt_SHA512t256_Update(&ctx[1], &cksum[1], 2 * 32);
opt_SHA512t256_Final(&ctx[0], cksum[4]);
opt_SHA512t256_Final(&ctx[1], cksum[5]);
/*
* Final hash.
*/
opt_SHA512t256_Init(&ctx[0]);
opt_SHA512t256_Update(&ctx[0], &cksum[4], 2 * 32);
opt_SHA512t256_Final(&ctx[0], cksum_buf);
} }
void void
@ -204,42 +278,62 @@ opt_SHA512(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
void void
opt_SHA512_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes) opt_SHA512_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
{ {
uchar_t *pos[2]; uchar_t cksum[6][64];
uint64_t len[2]; SHA512_Context ctx[4];
uchar_t cksum[2][64]; int i, rem;
int i; uint64_t _bytes;
SHA512_Context *mctx;
/* /*
* Is it worth doing the overhead of parallelism ? Buffer large enough ? * Is it worth doing the overhead of parallelism ? Buffer large enough ?
* If not then just do a simple serial hashing. * If not then just do a simple serial hashing.
*/ */
if (bytes / 2 <= SHA512_BLOCK_SIZE * 4) { if (bytes <= BLKSZ * 2) {
mctx = (SHA512_Context *)malloc(sizeof (SHA512_Context)); opt_SHA512_Init(&ctx[0]);
opt_SHA512_Init(mctx); opt_SHA512_Update(&ctx[0], buf, bytes);
opt_SHA512_Update(mctx, buf, bytes); opt_SHA512_Final(&ctx[0], cksum_buf);
opt_SHA512_Final(mctx, cksum_buf);
free(mctx);
return; return;
} }
pos[0] = buf;
len[0] = bytes/2; /*
pos[1] = buf + bytes/2; * Do first level hashes in parallel.
len[1] = bytes - bytes/2; */
_bytes = (bytes / BLKSZ) * BLKSZ;
rem = bytes - _bytes;
#if defined(_OPENMP) #if defined(_OPENMP)
# pragma omp parallel for # pragma omp parallel for
#endif #endif
for(i = 0; i < 2; ++i) for(i = 0; i < 4; ++i)
{ {
SHA512_Context ctx; uint64_t byt;
opt_SHA512_Init(&ctx);
opt_SHA512_Update(&ctx, pos[i], len[i]);
opt_SHA512_Final(&ctx, cksum[i]);
}
mctx = (SHA512_Context *)malloc(sizeof (SHA512_Context));
opt_SHA512_Init(mctx);
opt_SHA512_Update(mctx, cksum, 2 * 64);
opt_SHA512_Final(mctx, cksum_buf);
free(mctx);
}
byt = i * BLKSZ;
opt_SHA512_Init(&ctx[i]);
while (byt < _bytes) {
opt_SHA512_Update(&ctx[i], buf + byt, BLKSZ);
byt += 4 * BLKSZ;
}
if (i>0)
opt_SHA512_Final(&ctx[i], cksum[i]);
}
if (rem > 0) {
opt_SHA512_Update(&ctx[0], buf + bytes - rem, rem);
}
opt_SHA512_Final(&ctx[0], cksum[0]);
/*
* Second level hashes.
*/
opt_SHA512_Init(&ctx[0]);
opt_SHA512_Init(&ctx[1]);
opt_SHA512_Update(&ctx[0], &cksum[0], 2 * 64);
opt_SHA512_Update(&ctx[1], &cksum[1], 2 * 64);
opt_SHA512_Final(&ctx[0], cksum[4]);
opt_SHA512_Final(&ctx[1], cksum[5]);
/*
* Final hash.
*/
opt_SHA512_Init(&ctx[0]);
opt_SHA512_Update(&ctx[0], &cksum[4], 2 * 64);
opt_SHA512_Final(&ctx[0], cksum_buf);
}

143
crypto/sha3_utils.c
View file

@ -30,10 +30,21 @@
#include <utils.h> #include <utils.h>
#define KECCAK_BLOCK_SIZE 1024 #define KECCAK_BLOCK_SIZE 1024
#define BLKSZ (2048)
/* /*
* Helper functions for single-call SHA3 (Keccak) hashing. Both serial * Helper functions for single-call SHA3 (Keccak) hashing. Both serial
* and parallel versions are provided. * and parallel versions are provided. Parallel versions use 2-stage
* Merkle Tree hashing.
*
* At the leaf level data is split into BLKSZ blocks and 4 threads
* compute 4 hashes of interleaved block streams. At 2nd level two
* new hashes are generated from hashing the 2 pairs of hash values.
* In the final stage the 2 hash values are hashed to the final digest.
*
* References:
* http://eprint.iacr.org/2012/476.pdf
* http://gva.noekeon.org/papers/bdpv09tree.html
*/ */
int int
@ -45,32 +56,69 @@ Keccak256(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
int int
Keccak256_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes) Keccak256_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
{ {
uchar_t *pos[2]; uchar_t cksum[6][32];
uint64_t len[2]; hashState ctx[4];
uchar_t cksum[2][32]; int i, rem, rv[4];
int i, rv[2]; uint64_t _bytes;
/* /*
* Is it worth doing the overhead of parallelism ? Buffer large enough ? * Is it worth doing the overhead of parallelism ? Buffer large enough ?
* If not then just do a simple serial hashing. * If not then just do a simple serial hashing.
*/ */
if (bytes / 2 <= KECCAK_BLOCK_SIZE * 2) { if (bytes <= BLKSZ) {
return (Keccak_Hash(256, buf, bytes * 8, cksum_buf)); return (Keccak_Hash(256, buf, bytes * 8, cksum_buf));
} }
pos[0] = buf;
len[0] = bytes/2; /*
pos[1] = buf + bytes/2; * Do first level hashes in parallel.
len[1] = bytes - bytes/2; */
for (i = 0; i < 4; ++i) rv[i] = 0;
_bytes = (bytes / BLKSZ) * BLKSZ;
rem = bytes - _bytes;
#if defined(_OPENMP) #if defined(_OPENMP)
# pragma omp parallel for # pragma omp parallel for
#endif #endif
for(i = 0; i < 2; ++i) for(i = 0; i < 4; ++i)
{ {
rv[i] = Keccak_Hash(256, pos[i], len[i] * 8, cksum[i]); uint64_t byt;
byt = i * BLKSZ;
rv[i] |= Keccak_Init(&ctx[i], 256);
while (byt < _bytes) {
rv[i] |= Keccak_Update(&ctx[i], buf + byt, BLKSZ * 8);
byt += 4 * BLKSZ;
}
if (i>0)
rv[i] |= Keccak_Final(&ctx[i], cksum[i]);
} }
if (rv[0] != 0 || rv[1] != 0) if (rem > 0) {
return (-1); rv[0] |= Keccak_Update(&ctx[0], buf + bytes - rem, rem * 8);
return (Keccak_Hash(256, (const BitSequence *)cksum, 2 * 32 * 8, cksum_buf)); }
rv[0] |= Keccak_Final(&ctx[0], cksum[0]);
for (i = 0; i < 4; ++i) if (rv[i] != 0) return (-1);
rv[0] = 0;
rv[1] = 0;
/*
* Second level hashes.
*/
rv[0] |= Keccak_Init(&ctx[0], 256);
rv[1] |= Keccak_Init(&ctx[1], 256);
rv[0] |= Keccak_Update(&ctx[0], (const BitSequence *)&cksum[0], 2 * 32 * 8);
rv[1] |= Keccak_Update(&ctx[1], (const BitSequence *)&cksum[1], 2 * 32 * 8);
rv[0] |= Keccak_Final(&ctx[0], cksum[4]);
rv[1] |= Keccak_Final(&ctx[1], cksum[5]);
for (i = 0; i < 2; ++i) if (rv[i] != 0) return (-1);
/*
* Final hash.
*/
rv[0] = 0;
rv[0] |= Keccak_Init(&ctx[0], 256);
rv[0] |= Keccak_Update(&ctx[0], (const BitSequence *)&cksum[4], 2 * 32 * 8);
rv[0] |= Keccak_Final(&ctx[0], cksum_buf);
return (rv[0]);
} }
int int
@ -82,30 +130,67 @@ Keccak512(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
int int
Keccak512_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes) Keccak512_par(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
{ {
uchar_t *pos[2]; uchar_t cksum[6][64];
uint64_t len[2]; hashState ctx[4];
uchar_t cksum[2][64]; int i, rem, rv[4];
int i, rv[2]; uint64_t _bytes;
/* /*
* Is it worth doing the overhead of parallelism ? Buffer large enough ? * Is it worth doing the overhead of parallelism ? Buffer large enough ?
* If not then just do a simple serial hashing. * If not then just do a simple serial hashing.
*/ */
if (bytes / 2 <= KECCAK_BLOCK_SIZE * 2) { if (bytes <= BLKSZ) {
return (Keccak_Hash(512, buf, bytes * 8, cksum_buf)); return (Keccak_Hash(512, buf, bytes * 8, cksum_buf));
} }
pos[0] = buf;
len[0] = bytes/2; /*
pos[1] = buf + bytes/2; * Do first level hashes in parallel.
len[1] = bytes - bytes/2; */
for (i = 0; i < 4; ++i) rv[i] = 0;
_bytes = (bytes / BLKSZ) * BLKSZ;
rem = bytes - _bytes;
#if defined(_OPENMP) #if defined(_OPENMP)
# pragma omp parallel for # pragma omp parallel for
#endif #endif
for(i = 0; i < 2; ++i) for(i = 0; i < 4; ++i)
{ {
rv[i] = Keccak_Hash(512, pos[i], len[i] * 8, cksum[i]); uint64_t byt;
byt = i * BLKSZ;
rv[i] |= Keccak_Init(&ctx[i], 512);
while (byt < _bytes) {
rv[i] |= Keccak_Update(&ctx[i], buf + byt, BLKSZ * 8);
byt += 4 * BLKSZ;
}
if (i>0)
rv[i] |= Keccak_Final(&ctx[i], cksum[i]);
} }
if (rv[0] != 0 || rv[1] != 0) if (rem > 0) {
return (-1); rv[0] |= Keccak_Update(&ctx[0], buf + bytes - rem, rem * 8);
return (Keccak_Hash(512, (const BitSequence *)cksum, 2 * 64 * 8, cksum_buf)); }
rv[0] |= Keccak_Final(&ctx[0], cksum[0]);
for (i = 0; i < 4; ++i) if (rv[i] != 0) return (-1);
rv[0] = 0;
rv[1] = 0;
/*
* Second level hashes.
*/
rv[0] |= Keccak_Init(&ctx[0], 512);
rv[1] |= Keccak_Init(&ctx[1], 512);
rv[0] |= Keccak_Update(&ctx[0], (const BitSequence *)&cksum[0], 2 * 64 * 8);
rv[1] |= Keccak_Update(&ctx[1], (const BitSequence *)&cksum[1], 2 * 64 * 8);
rv[0] |= Keccak_Final(&ctx[0], cksum[4]);
rv[1] |= Keccak_Final(&ctx[1], cksum[5]);
for (i = 0; i < 2; ++i) if (rv[i] != 0) return (-1);
/*
* Final hash.
*/
rv[0] = 0;
rv[0] |= Keccak_Init(&ctx[0], 512);
rv[0] |= Keccak_Update(&ctx[0], (const BitSequence *)&cksum[4], 2 * 64 * 8);
rv[0] |= Keccak_Final(&ctx[0], cksum_buf);
return (rv[0]);
} }

15
utils/xxhash.c
View file

@ -30,7 +30,12 @@
- xxHash source repository : http://code.google.com/p/xxhash/ - xxHash source repository : http://code.google.com/p/xxhash/
*/ */
/*
* Modified by Moinak Ghosh for pcompress. The new hashing approach
* with interleaved blocks is derived from the following paper:
*
* http://eprint.iacr.org/2012/476.pdf
*/
//************************************** //**************************************
// Tuning parameters // Tuning parameters
@ -356,10 +361,10 @@ int CPUCAP_NM(XXH32_feed) (void* state_in, const void* input, int len)
/* /*
* 4-way SIMD calculations with 4 ints in two blocks for 2 accumulators will * 4-way SIMD calculations with 4 ints in two blocks for 2 accumulators will
* interleave to some extent on a hyperthreaded processor providing 10% - 14% * interleave to some extent on the superscalar x86 processor providing
* speedup over original xxhash depending on processor. We could have used * 10% - 14% speedup over original xxhash depending on processor model. We
* aligned loads but we actually want the unaligned penalty. It helps to * could have used aligned loads but we actually want the unaligned penalty.
* interleave better for a slight benefit over aligned loads here! * It helps to interleave better for a slight benefit over aligned loads here!
*/ */
do { do {
__m128i mem = _mm_loadu_si128((__m128i *)p); __m128i mem = _mm_loadu_si128((__m128i *)p);