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sha512: use larger constant table only if sha512 is in fact selected

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function                                             old     new   delta
sha_K                                                640     256    -384

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-01-15 20:16:27 +01:00
parent 3f8ecd933a
commit b8935d00b0
2 changed files with 70 additions and 47 deletions
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106
libbb/hash_md5_sha.c
View File

@ -9,6 +9,8 @@
#include "libbb.h" #include "libbb.h"
#define NEED_SHA512 (ENABLE_SHA512SUM || ENABLE_USE_BB_CRYPT_SHA)
/* gcc 4.2.1 optimizes rotr64 better with inline than with macro /* gcc 4.2.1 optimizes rotr64 better with inline than with macro
* (for rotX32, there is no difference). Why? My guess is that * (for rotX32, there is no difference). Why? My guess is that
* macro requires clever common subexpression elimination heuristics * macro requires clever common subexpression elimination heuristics
@ -564,48 +566,59 @@ static void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx)
* are the most significant half of first 64 elements * are the most significant half of first 64 elements
* of the same array. * of the same array.
*/ */
static const uint64_t sha_K[80] = { #undef K
0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, #if NEED_SHA512
0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, typedef uint64_t sha_K_int;
0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, # define K(v) v
0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, #else
0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, typedef uint32_t sha_K_int;
0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, # define K(v) (uint32_t)(v >> 32)
0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, #endif
0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, static const sha_K_int sha_K[] = {
0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, K(0x428a2f98d728ae22ULL), K(0x7137449123ef65cdULL),
0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, K(0xb5c0fbcfec4d3b2fULL), K(0xe9b5dba58189dbbcULL),
0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, K(0x3956c25bf348b538ULL), K(0x59f111f1b605d019ULL),
0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, K(0x923f82a4af194f9bULL), K(0xab1c5ed5da6d8118ULL),
0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, K(0xd807aa98a3030242ULL), K(0x12835b0145706fbeULL),
0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, K(0x243185be4ee4b28cULL), K(0x550c7dc3d5ffb4e2ULL),
0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, K(0x72be5d74f27b896fULL), K(0x80deb1fe3b1696b1ULL),
0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, K(0x9bdc06a725c71235ULL), K(0xc19bf174cf692694ULL),
0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, K(0xe49b69c19ef14ad2ULL), K(0xefbe4786384f25e3ULL),
0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, K(0x0fc19dc68b8cd5b5ULL), K(0x240ca1cc77ac9c65ULL),
0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, K(0x2de92c6f592b0275ULL), K(0x4a7484aa6ea6e483ULL),
0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, K(0x5cb0a9dcbd41fbd4ULL), K(0x76f988da831153b5ULL),
0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, K(0x983e5152ee66dfabULL), K(0xa831c66d2db43210ULL),
0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, K(0xb00327c898fb213fULL), K(0xbf597fc7beef0ee4ULL),
0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, K(0xc6e00bf33da88fc2ULL), K(0xd5a79147930aa725ULL),
0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, K(0x06ca6351e003826fULL), K(0x142929670a0e6e70ULL),
0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, K(0x27b70a8546d22ffcULL), K(0x2e1b21385c26c926ULL),
0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, K(0x4d2c6dfc5ac42aedULL), K(0x53380d139d95b3dfULL),
0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, K(0x650a73548baf63deULL), K(0x766a0abb3c77b2a8ULL),
0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, K(0x81c2c92e47edaee6ULL), K(0x92722c851482353bULL),
0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, K(0xa2bfe8a14cf10364ULL), K(0xa81a664bbc423001ULL),
0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, K(0xc24b8b70d0f89791ULL), K(0xc76c51a30654be30ULL),
0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, K(0xd192e819d6ef5218ULL), K(0xd69906245565a910ULL),
0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, K(0xf40e35855771202aULL), K(0x106aa07032bbd1b8ULL),
0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, /* [64]+ are used for sha512 only */ K(0x19a4c116b8d2d0c8ULL), K(0x1e376c085141ab53ULL),
0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, K(0x2748774cdf8eeb99ULL), K(0x34b0bcb5e19b48a8ULL),
0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, K(0x391c0cb3c5c95a63ULL), K(0x4ed8aa4ae3418acbULL),
0x113f9804bef90daeULL, 0x1b710b35131c471bULL, K(0x5b9cca4f7763e373ULL), K(0x682e6ff3d6b2b8a3ULL),
0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, K(0x748f82ee5defb2fcULL), K(0x78a5636f43172f60ULL),
0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, K(0x84c87814a1f0ab72ULL), K(0x8cc702081a6439ecULL),
0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, K(0x90befffa23631e28ULL), K(0xa4506cebde82bde9ULL),
0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL K(0xbef9a3f7b2c67915ULL), K(0xc67178f2e372532bULL),
#if NEED_SHA512 /* [64]+ are used for sha512 only */
K(0xca273eceea26619cULL), K(0xd186b8c721c0c207ULL),
K(0xeada7dd6cde0eb1eULL), K(0xf57d4f7fee6ed178ULL),
K(0x06f067aa72176fbaULL), K(0x0a637dc5a2c898a6ULL),
K(0x113f9804bef90daeULL), K(0x1b710b35131c471bULL),
K(0x28db77f523047d84ULL), K(0x32caab7b40c72493ULL),
K(0x3c9ebe0a15c9bebcULL), K(0x431d67c49c100d4cULL),
K(0x4cc5d4becb3e42b6ULL), K(0x597f299cfc657e2aULL),
K(0x5fcb6fab3ad6faecULL), K(0x6c44198c4a475817ULL),
#endif
}; };
#undef K
#undef Ch #undef Ch
#undef Maj #undef Maj
@ -649,7 +662,7 @@ static void FAST_FUNC sha256_process_block64(sha256_ctx_t *ctx)
* (I hope compiler is clever enough to just fetch * (I hope compiler is clever enough to just fetch
* upper half) * upper half)
*/ */
uint32_t K_t = sha_K[t] >> 32; uint32_t K_t = NEED_SHA512 ? (sha_K[t] >> 32) : sha_K[t];
uint32_t T1 = h + S1(e) + Ch(e, f, g) + K_t + W[t]; uint32_t T1 = h + S1(e) + Ch(e, f, g) + K_t + W[t];
uint32_t T2 = S0(a) + Maj(a, b, c); uint32_t T2 = S0(a) + Maj(a, b, c);
h = g; h = g;
@ -679,6 +692,7 @@ static void FAST_FUNC sha256_process_block64(sha256_ctx_t *ctx)
ctx->hash[7] += h; ctx->hash[7] += h;
} }
#if NEED_SHA512
static void FAST_FUNC sha512_process_block128(sha512_ctx_t *ctx) static void FAST_FUNC sha512_process_block128(sha512_ctx_t *ctx)
{ {
unsigned t; unsigned t;
@ -740,7 +754,7 @@ static void FAST_FUNC sha512_process_block128(sha512_ctx_t *ctx)
ctx->hash[6] += g; ctx->hash[6] += g;
ctx->hash[7] += h; ctx->hash[7] += h;
} }
#endif /* NEED_SHA512 */
void FAST_FUNC sha1_begin(sha1_ctx_t *ctx) void FAST_FUNC sha1_begin(sha1_ctx_t *ctx)
{ {
@ -765,6 +779,7 @@ static const uint32_t init256[] = {
0x1f83d9ab, 0x1f83d9ab,
0x5be0cd19, 0x5be0cd19,
}; };
#if NEED_SHA512
static const uint32_t init512_lo[] = { static const uint32_t init512_lo[] = {
0, 0,
0, 0,
@ -777,6 +792,7 @@ static const uint32_t init512_lo[] = {
0xfb41bd6b, 0xfb41bd6b,
0x137e2179, 0x137e2179,
}; };
#endif /* NEED_SHA512 */
/* Initialize structure containing state of computation. /* Initialize structure containing state of computation.
(FIPS 180-2:5.3.2) */ (FIPS 180-2:5.3.2) */
@ -787,6 +803,7 @@ void FAST_FUNC sha256_begin(sha256_ctx_t *ctx)
ctx->process_block = sha256_process_block64; ctx->process_block = sha256_process_block64;
} }
#if NEED_SHA512
/* Initialize structure containing state of computation. /* Initialize structure containing state of computation.
(FIPS 180-2:5.3.3) */ (FIPS 180-2:5.3.3) */
void FAST_FUNC sha512_begin(sha512_ctx_t *ctx) void FAST_FUNC sha512_begin(sha512_ctx_t *ctx)
@ -845,6 +862,7 @@ void FAST_FUNC sha512_hash(sha512_ctx_t *ctx, const void *buffer, size_t len)
} }
# endif # endif
} }
#endif /* NEED_SHA512 */
/* Used also for sha256 */ /* Used also for sha256 */
void FAST_FUNC sha1_end(sha1_ctx_t *ctx, void *resbuf) void FAST_FUNC sha1_end(sha1_ctx_t *ctx, void *resbuf)
@ -864,6 +882,7 @@ void FAST_FUNC sha1_end(sha1_ctx_t *ctx, void *resbuf)
memcpy(resbuf, ctx->hash, sizeof(ctx->hash[0]) * hash_size); memcpy(resbuf, ctx->hash, sizeof(ctx->hash[0]) * hash_size);
} }
#if NEED_SHA512
void FAST_FUNC sha512_end(sha512_ctx_t *ctx, void *resbuf) void FAST_FUNC sha512_end(sha512_ctx_t *ctx, void *resbuf)
{ {
unsigned bufpos = ctx->total64[0] & 127; unsigned bufpos = ctx->total64[0] & 127;
@ -897,6 +916,7 @@ void FAST_FUNC sha512_end(sha512_ctx_t *ctx, void *resbuf)
} }
memcpy(resbuf, ctx->hash, sizeof(ctx->hash)); memcpy(resbuf, ctx->hash, sizeof(ctx->hash));
} }
#endif /* NEED_SHA512 */
/* /*

5
make_single_applets.sh
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@ -30,9 +30,12 @@ done
trap 'test -f .config.SV && mv .config.SV .config && touch .config' EXIT trap 'test -f .config.SV && mv .config.SV .config && touch .config' EXIT
# Turn on each applet individually and build single-applet executable # Turn on each applet individually and build single-applet executable
# (give config names on command line to build only those)
test $# = 0 && set -- $apps
fail=0 fail=0
for app in $apps; do for app; do
# Only if it was indeed originally enabled... # Only if it was indeed originally enabled...
{ echo "$cfg" | grep -q "^CONFIG_${app}=y\$"; } || continue { echo "$cfg" | grep -q "^CONFIG_${app}=y\$"; } || continue