/* $Id: hamsi.c 251 2010-10-19 14:31:51Z tp $ */
/*
* Hamsi implementation.
*
* ==========================(LICENSE BEGIN)============================
*
* Copyright (c) 2007-2010 Projet RNRT SAPHIR
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* ===========================(LICENSE END)=============================
*
* @author Thomas Pornin <thomas.pornin@cryptolog.com>
*/
#include <stddef.h>
#include <string.h>
#include "sph_hamsi.h"
#ifdef __cplusplus
extern "C"{
#endif
#if SPH_SMALL_FOOTPRINT && !defined SPH_SMALL_FOOTPRINT_HAMSI
#define SPH_SMALL_FOOTPRINT_HAMSI 1
#endif
/*
* The SPH_HAMSI_EXPAND_* define how many input bits we handle in one
* table lookup during message expansion (1 to 8, inclusive). If we note
* w the number of bits per message word (w=32 for Hamsi-224/256, w=64
* for Hamsi-384/512), r the size of a "row" in 32-bit words (r=8 for
* Hamsi-224/256, r=16 for Hamsi-384/512), and n the expansion level,
* then we will get t tables (where t=ceil(w/n)) of individual size
* 2^n*r*4 (in bytes). The last table may be shorter (e.g. with w=32 and
* n=5, there are 7 tables, but the last one uses only two bits on
* input, not five).
*
* Also, we read t rows of r words from RAM. Words in a given row are
* concatenated in RAM in that order, so most of the cost is about
* reading the first row word; comparatively, cache misses are thus
* less expensive with Hamsi-512 (r=16) than with Hamsi-256 (r=8).
*
* When n=1, tables are "special" in that we omit the first entry of
* each table (which always contains 0), so that total table size is
* halved.
*
* We thus have the following (size1 is the cumulative table size of
* Hamsi-224/256; size2 is for Hamsi-384/512; similarly, t1 and t2
* are for Hamsi-224/256 and Hamsi-384/512, respectively).
*
* n size1 size2 t1 t2
* ---------------------------------------
* 1 1024 4096 32 64
* 2 2048 8192 16 32
* 3 2688 10880 11 22
* 4 4096 16384 8 16
* 5 6272 25600 7 13
* 6 10368 41984 6 11
* 7 16896 73856 5 10
* 8 32768 131072 4 8
*
* So there is a trade-off: a lower n makes the tables fit better in
* L1 cache, but increases the number of memory accesses. The optimal
* value depends on the amount of available L1 cache and the relative
* impact of a cache miss.
*
* Experimentally, in ideal benchmark conditions (which are not necessarily
* realistic with regards to L1 cache contention), it seems that n=8 is
* the best value on "big" architectures (those with 32 kB or more of L1
* cache), while n=4 is better on "small" architectures. This was tested
* on an Intel Core2 Q6600 (both 32-bit and 64-bit mode), a PowerPC G3
* (32 kB L1 cache, hence "big"), and a MIPS-compatible Broadcom BCM3302
* (8 kB L1 cache).
*
* Note: with n=1, the 32 tables (actually implemented as one big table)
* are read entirely and sequentially, regardless of the input data,
* thus avoiding any data-dependent table access pattern.
*/
#if !defined SPH_HAMSI_EXPAND_SMALL
#if SPH_SMALL_FOOTPRINT_HAMSI
#define SPH_HAMSI_EXPAND_SMALL 4
#else
#define SPH_HAMSI_EXPAND_SMALL 8
#endif
#endif
#if !defined SPH_HAMSI_EXPAND_BIG
#define SPH_HAMSI_EXPAND_BIG 8
#endif
#ifdef _MSC_VER
#pragma warning (disable: 4146)
#endif
#include "hamsi_helper.c"
static const sph_u32 IV224[] = {
SPH_C32(0xc3967a67), SPH_C32(0xc3bc6c20), SPH_C32(0x4bc3bcc3),
SPH_C32(0xa7c3bc6b), SPH_C32(0x2c204b61), SPH_C32(0x74686f6c),
SPH_C32(0x69656b65), SPH_C32(0x20556e69)
};
/*
* This version is the one used in the Hamsi submission package for
* round 2 of the SHA-3 competition; the UTF-8 encoding is wrong and
* shall soon be corrected in the official Hamsi specification.
*
static const sph_u32 IV224[] = {
SPH_C32(0x3c967a67), SPH_C32(0x3cbc6c20), SPH_C32(0xb4c343c3),
SPH_C32(0xa73cbc6b), SPH_C32(0x2c204b61), SPH_C32(0x74686f6c),
SPH_C32(0x69656b65), SPH_C32(0x20556e69)
};
*/
static const sph_u32 IV256[] = {
SPH_C32(0x76657273), SPH_C32(0x69746569), SPH_C32(0x74204c65),
SPH_C32(0x7576656e), SPH_C32(0x2c204465), SPH_C32(0x70617274),
SPH_C32(0x656d656e), SPH_C32(0x7420456c)
};
static const sph_u32 IV384[] = {
SPH_C32(0x656b7472), SPH_C32(0x6f746563), SPH_C32(0x686e6965),
SPH_C32(0x6b2c2043), SPH_C32(0x6f6d7075), SPH_C32(0x74657220),
SPH_C32(0x53656375), SPH_C32(0x72697479), SPH_C32(0x20616e64),
SPH_C32(0x20496e64), SPH_C32(0x75737472), SPH_C32(0x69616c20),
SPH_C32(0x43727970), SPH_C32(0x746f6772), SPH_C32(0x61706879),
SPH_C32(0x2c204b61)
};
static const sph_u32 IV512[] = {
SPH_C32(0x73746565), SPH_C32(0x6c706172), SPH_C32(0x6b204172),
SPH_C32(0x656e6265), SPH_C32(0x72672031), SPH_C32(0x302c2062),
SPH_C32(0x75732032), SPH_C32(0x3434362c), SPH_C32(0x20422d33),
SPH_C32(0x30303120), SPH_C32(0x4c657576), SPH_C32(0x656e2d48),
SPH_C32(0x65766572), SPH_C32(0x6c65652c), SPH_C32(0x2042656c),
SPH_C32(0x6769756d)
};
static const sph_u32 alpha_n[] = {
SPH_C32(0xff00f0f0), SPH_C32(0xccccaaaa), SPH_C32(0xf0f0cccc),
SPH_C32(0xff00aaaa), SPH_C32(0xccccaaaa), SPH_C32(0xf0f0ff00),
SPH_C32(0xaaaacccc), SPH_C32(0xf0f0ff00), SPH_C32(0xf0f0cccc),
SPH_C32(0xaaaaff00), SPH_C32(0xccccff00), SPH_C32(0xaaaaf0f0),
SPH_C32(0xaaaaf0f0), SPH_C32(0xff00cccc), SPH_C32(0xccccf0f0),
SPH_C32(0xff00aaaa), SPH_C32(0xccccaaaa), SPH_C32(0xff00f0f0),
SPH_C32(0xff00aaaa), SPH_C32(0xf0f0cccc), SPH_C32(0xf0f0ff00),
SPH_C32(0xccccaaaa), SPH_C32(0xf0f0ff00), SPH_C32(0xaaaacccc),
SPH_C32(0xaaaaff00), SPH_C32(0xf0f0cccc), SPH_C32(0xaaaaf0f0),
SPH_C32(0xccccff00), SPH_C32(0xff00cccc), SPH_C32(0xaaaaf0f0),
SPH_C32(0xff00aaaa), SPH_C32(0xccccf0f0)
};
static const sph_u32 alpha_f[] = {
SPH_C32(0xcaf9639c), SPH_C32(0x0ff0f9c0), SPH_C32(0x639c0ff0),
SPH_C32(0xcaf9f9c0), SPH_C32(0x0ff0f9c0), SPH_C32(0x639ccaf9),
SPH_C32(0xf9c00ff0), SPH_C32(0x639ccaf9), SPH_C32(0x639c0ff0),
SPH_C32(0xf9c0caf9), SPH_C32(0x0ff0caf9), SPH_C32(0xf9c0639c),
SPH_C32(0xf9c0639c), SPH_C32(0xcaf90ff0), SPH_C32(0x0ff0639c),
SPH_C32(0xcaf9f9c0), SPH_C32(0x0ff0f9c0), SPH_C32(0xcaf9639c),
SPH_C32(0xcaf9f9c0), SPH_C32(0x639c0ff0), SPH_C32(0x639ccaf9),
SPH_C32(0x0ff0f9c0), SPH_C32(0x639ccaf9), SPH_C32(0xf9c00ff0),
SPH_C32(0xf9c0caf9), SPH_C32(0x639c0ff0), SPH_C32(0xf9c0639c),
SPH_C32(0x0ff0caf9), SPH_C32(0xcaf90ff0), SPH_C32(0xf9c0639c),
SPH_C32(0xcaf9f9c0), SPH_C32(0x0ff0639c)
};
#define DECL_STATE_SMALL \
sph_u32 c0, c1, c2, c3, c4, c5, c6, c7;
#define READ_STATE_SMALL(sc) do { \
c0 = sc->h[0x0]; \
c1 = sc->h[0x1]; \
c2 = sc->h[0x2]; \
c3 = sc->h[0x3]; \
c4 = sc->h[0x4]; \
c5 = sc->h[0x5]; \
c6 = sc->h[0x6]; \
c7 = sc->h[0x7]; \
} while (0)
#define WRITE_STATE_SMALL(sc) do { \
sc->h[0x0] = c0; \
sc->h[0x1] = c1; \
sc->h[0x2] = c2; \
sc->h[0x3] = c3; \
sc->h[0x4] = c4; \
sc->h[0x5] = c5; \
sc->h[0x6] = c6; \
sc->h[0x7] = c7; \
} while (0)
#define s0 m0
#define s1 m1
#define s2 c0
#define s3 c1
#define s4 c2
#define s5 c3
#define s6 m2
#define s7 m3
#define s8 m4
#define s9 m5
#define sA c4
#define sB c5
#define sC c6
#define sD c7
#define sE m6
#define sF m7
#define SBOX(a, b, c, d) do { \
sph_u32 t; \
t = (a); \
(a) &= (c); \
(a) ^= (d); \
(c) ^= (b); \
(c) ^= (a); \
(d) |= t; \
(d) ^= (b); \
t ^= (c); \
(b) = (d); \
(d) |= t; \
(d) ^= (a); \
(a) &= (b); \
t ^= (a); \
(b) ^= (d); \
(b) ^= t; \
(a) = (c); \
(c) = (b); \
(b) = (d); \
(d) = SPH_T32(~t); \
} while (0)
#define L(a, b, c, d) do { \
(a) = SPH_ROTL32(a, 13); \
(c) = SPH_ROTL32(c, 3); \
(b) ^= (a) ^ (c); \
(d) ^= (c) ^ SPH_T32((a) << 3); \
(b) = SPH_ROTL32(b, 1); \
(d) = SPH_ROTL32(d, 7); \
(a) ^= (b) ^ (d); \
(c) ^= (d) ^ SPH_T32((b) << 7); \
(a) = SPH_ROTL32(a, 5); \
(c) = SPH_ROTL32(c, 22); \
} while (0)
#define ROUND_SMALL(rc, alpha) do { \
s0 ^= alpha[0x00]; \
s1 ^= alpha[0x01] ^ (sph_u32)(rc); \
s2 ^= alpha[0x02]; \
s3 ^= alpha[0x03]; \
s4 ^= alpha[0x08]; \
s5 ^= alpha[0x09]; \
s6 ^= alpha[0x0A]; \
s7 ^= alpha[0x0B]; \
s8 ^= alpha[0x10]; \
s9 ^= alpha[0x11]; \
sA ^= alpha[0x12]; \
sB ^= alpha[0x13]; \
sC ^= alpha[0x18]; \
sD ^= alpha[0x19]; \
sE ^= alpha[0x1A]; \
sF ^= alpha[0x1B]; \
SBOX(s0, s4, s8, sC); \
SBOX(s1, s5, s9, sD); \
SBOX(s2, s6, sA, sE); \
SBOX(s3, s7, sB, sF); \
L(s0, s5, sA, sF); \
L(s1, s6, sB, sC); \
L(s2, s7, s8, sD); \
L(s3, s4, s9, sE); \
} while (0)
#define P_SMALL do { \
ROUND_SMALL(0, alpha_n); \
ROUND_SMALL(1, alpha_n); \
ROUND_SMALL(2, alpha_n); \
} while (0)
#define PF_SMALL do { \
ROUND_SMALL(0, alpha_f); \
ROUND_SMALL(1, alpha_f); \
ROUND_SMALL(2, alpha_f); \
ROUND_SMALL(3, alpha_f); \
ROUND_SMALL(4, alpha_f); \
ROUND_SMALL(5, alpha_f); \
} while (0)
#define T_SMALL do { \
/* order is important */ \
c7 = (sc->h[7] ^= sB); \
c6 = (sc->h[6] ^= sA); \
c5 = (sc->h[5] ^= s9); \
c4 = (sc->h[4] ^= s8); \
c3 = (sc->h[3] ^= s3); \
c2 = (sc->h[2] ^= s2); \
c1 = (sc->h[1] ^= s1); \
c0 = (sc->h[0] ^= s0); \
} while (0)
static void
hamsi_small(sph_hamsi_small_context *sc, const unsigned char *buf, size_t num)
{
DECL_STATE_SMALL
#if !SPH_64
sph_u32 tmp;
#endif
#if SPH_64
sc->count += (sph_u64)num << 5;
#else
tmp = SPH_T32((sph_u32)num << 5);
sc->count_low = SPH_T32(sc->count_low + tmp);
sc->count_high += (sph_u32)((num >> 13) >> 14);
if (sc->count_low < tmp)
sc->count_high ++;
#endif
READ_STATE_SMALL(sc);
while (num -- > 0) {
sph_u32 m0, m1, m2, m3, m4, m5, m6, m7;
INPUT_SMALL;
P_SMALL;
T_SMALL;
buf += 4;
}
WRITE_STATE_SMALL(sc);
}
static void
hamsi_small_final(sph_hamsi_small_context *sc, const unsigned char *buf)
{
sph_u32 m0, m1, m2, m3, m4, m5, m6, m7;
DECL_STATE_SMALL
READ_STATE_SMALL(sc);
INPUT_SMALL;
PF_SMALL;
T_SMALL;
WRITE_STATE_SMALL(sc);
}
static void
hamsi_small_init(sph_hamsi_small_context *sc, const sph_u32 *iv)
{
sc->partial_len = 0;
memcpy(sc->h, iv, sizeof sc->h);
#if SPH_64
sc->count = 0;
#else
sc->count_high = sc->count_low = 0;
#endif
}
static void
hamsi_small_core(sph_hamsi_small_context *sc, const void *data, size_t len)
{
if (sc->partial_len != 0) {
size_t mlen;
mlen = 4 - sc->partial_len;
if (len < mlen) {
memcpy(sc->partial + sc->partial_len, data, len);
sc->partial_len += len;
return;
} else {
memcpy(sc->partial + sc->partial_len, data, mlen);
len -= mlen;
data = (const unsigned char *)data + mlen;
hamsi_small(sc, sc->partial, 1);
sc->partial_len = 0;
}
}
hamsi_small(sc, data, (len >> 2));
data = (const unsigned char *)data + (len & ~(size_t)3);
len &= (size_t)3;
memcpy(sc->partial, data, len);
sc->partial_len = len;
}
static void
hamsi_small_close(sph_hamsi_small_context *sc,
unsigned ub, unsigned n, void *dst, size_t out_size_w32)
{
unsigned char pad[12];
size_t ptr, u;
unsigned z;
unsigned char *out;
ptr = sc->partial_len;
memcpy(pad, sc->partial, ptr);
#if SPH_64
sph_enc64be(pad + 4, sc->count + (ptr << 3) + n);
#else
sph_enc32be(pad + 4, sc->count_high);
sph_enc32be(pad + 8, sc->count_low + (ptr << 3) + n);
#endif
z = 0x80 >> n;
pad[ptr ++] = ((ub & -z) | z) & 0xFF;
while (ptr < 4)
pad[ptr ++] = 0;
hamsi_small(sc, pad, 2);
hamsi_small_final(sc, pad + 8);
out = dst;
for (u = 0; u < out_size_w32; u ++)
sph_enc32be(out + (u << 2), sc->h[u]);
}
#define DECL_STATE_BIG \
sph_u32 c0, c1, c2, c3, c4, c5, c6, c7; \
sph_u32 c8, c9, cA, cB, cC, cD, cE, cF;
#define READ_STATE_BIG(sc) do { \
c0 = sc->h[0x0]; \
c1 = sc->h[0x1]; \
c2 = sc->h[0x2]; \
c3 = sc->h[0x3]; \
c4 = sc->h[0x4]; \
c5 = sc->h[0x5]; \
c6 = sc->h[0x6]; \
c7 = sc->h[0x7]; \
c8 = sc->h[0x8]; \
c9 = sc->h[0x9]; \
cA = sc->h[0xA]; \
cB = sc->h[0xB]; \
cC = sc->h[0xC]; \
cD = sc->h[0xD]; \
cE = sc->h[0xE]; \
cF = sc->h[0xF]; \
} while (0)
#define WRITE_STATE_BIG(sc) do { \
sc->h[0x0] = c0; \
sc->h[0x1] = c1; \
sc->h[0x2] = c2; \
sc->h[0x3] = c3; \
sc->h[0x4] = c4; \
sc->h[0x5] = c5; \
sc->h[0x6] = c6; \
sc->h[0x7] = c7; \
sc->h[0x8] = c8; \
sc->h[0x9] = c9; \
sc->h[0xA] = cA; \
sc->h[0xB] = cB; \
sc->h[0xC] = cC; \
sc->h[0xD] = cD; \
sc->h[0xE] = cE; \
sc->h[0xF] = cF; \
} while (0)
#define s00 m0
#define s01 m1
#define s02 c0
#define s03 c1
#define s04 m2
#define s05 m3
#define s06 c2
#define s07 c3
#define s08 c4
#define s09 c5
#define s0A m4
#define s0B m5
#define s0C c6
#define s0D c7
#define s0E m6
#define s0F m7
#define s10 m8
#define s11 m9
#define s12 c8
#define s13 c9
#define s14 mA
#define s15 mB
#define s16 cA
#define s17 cB
#define s18 cC
#define s19 cD
#define s1A mC
#define s1B mD
#define s1C cE
#define s1D cF
#define s1E mE
#define s1F mF
#define ROUND_BIG(rc, alpha) do { \
s00 ^= alpha[0x00]; \
s01 ^= alpha[0x01] ^ (sph_u32)(rc); \
s02 ^= alpha[0x02]; \
s03 ^= alpha[0x03]; \
s04 ^= alpha[0x04]; \
s05 ^= alpha[0x05]; \
s06 ^= alpha[0x06]; \
s07 ^= alpha[0x07]; \
s08 ^= alpha[0x08]; \
s09 ^= alpha[0x09]; \
s0A ^= alpha[0x0A]; \
s0B ^= alpha[0x0B]; \
s0C ^= alpha[0x0C]; \
s0D ^= alpha[0x0D]; \
s0E ^= alpha[0x0E]; \
s0F ^= alpha[0x0F]; \
s10 ^= alpha[0x10]; \
s11 ^= alpha[0x11]; \
s12 ^= alpha[0x12]; \
s13 ^= alpha[0x13]; \
s14 ^= alpha[0x14]; \
s15 ^= alpha[0x15]; \
s16 ^= alpha[0x16]; \
s17 ^= alpha[0x17]; \
s18 ^= alpha[0x18]; \
s19 ^= alpha[0x19]; \
s1A ^= alpha[0x1A]; \
s1B ^= alpha[0x1B]; \
s1C ^= alpha[0x1C]; \
s1D ^= alpha[0x1D]; \
s1E ^= alpha[0x1E]; \
s1F ^= alpha[0x1F]; \
SBOX(s00, s08, s10, s18); \
SBOX(s01, s09, s11, s19); \
SBOX(s02, s0A, s12, s1A); \
SBOX(s03, s0B, s13, s1B); \
SBOX(s04, s0C, s14, s1C); \
SBOX(s05, s0D, s15, s1D); \
SBOX(s06, s0E, s16, s1E); \
SBOX(s07, s0F, s17, s1F); \
L(s00, s09, s12, s1B); \
L(s01, s0A, s13, s1C); \
L(s02, s0B, s14, s1D); \
L(s03, s0C, s15, s1E); \
L(s04, s0D, s16, s1F); \
L(s05, s0E, s17, s18); \
L(s06, s0F, s10, s19); \
L(s07, s08, s11, s1A); \
L(s00, s02, s05, s07); \
L(s10, s13, s15, s16); \
L(s09, s0B, s0C, s0E); \
L(s19, s1A, s1C, s1F); \
} while (0)
#if SPH_SMALL_FOOTPRINT_HAMSI
#define P_BIG do { \
unsigned r; \
for (r = 0; r < 6; r ++) \
ROUND_BIG(r, alpha_n); \
} while (0)
#define PF_BIG do { \
unsigned r; \
for (r = 0; r < 12; r ++) \
ROUND_BIG(r, alpha_f); \
} while (0)
#else
#define P_BIG do { \
ROUND_BIG(0, alpha_n); \
ROUND_BIG(1, alpha_n); \
ROUND_BIG(2, alpha_n); \
ROUND_BIG(3, alpha_n); \
ROUND_BIG(4, alpha_n); \
ROUND_BIG(5, alpha_n); \
} while (0)
#define PF_BIG do { \
ROUND_BIG(0, alpha_f); \
ROUND_BIG(1, alpha_f); \
ROUND_BIG(2, alpha_f); \
ROUND_BIG(3, alpha_f); \
ROUND_BIG(4, alpha_f); \
ROUND_BIG(5, alpha_f); \
ROUND_BIG(6, alpha_f); \
ROUND_BIG(7, alpha_f); \
ROUND_BIG(8, alpha_f); \
ROUND_BIG(9, alpha_f); \
ROUND_BIG(10, alpha_f); \
ROUND_BIG(11, alpha_f); \
} while (0)
#endif
#define T_BIG do { \
/* order is important */ \
cF = (sc->h[0xF] ^= s17); \
cE = (sc->h[0xE] ^= s16); \
cD = (sc->h[0xD] ^= s15); \
cC = (sc->h[0xC] ^= s14); \
cB = (sc->h[0xB] ^= s13); \
cA = (sc->h[0xA] ^= s12); \
c9 = (sc->h[0x9] ^= s11); \
c8 = (sc->h[0x8] ^= s10); \
c7 = (sc->h[0x7] ^= s07); \
c6 = (sc->h[0x6] ^= s06); \
c5 = (sc->h[0x5] ^= s05); \
c4 = (sc->h[0x4] ^= s04); \
c3 = (sc->h[0x3] ^= s03); \
c2 = (sc->h[0x2] ^= s02); \
c1 = (sc->h[0x1] ^= s01); \
c0 = (sc->h[0x0] ^= s00); \
} while (0)
static void
hamsi_big(sph_hamsi_big_context *sc, const unsigned char *buf, size_t num)
{
DECL_STATE_BIG
#if !SPH_64
sph_u32 tmp;
#endif
#if SPH_64
sc->count += (sph_u64)num << 6;
#else
tmp = SPH_T32((sph_u32)num << 6);
sc->count_low = SPH_T32(sc->count_low + tmp);
sc->count_high += (sph_u32)((num >> 13) >> 13);
if (sc->count_low < tmp)
sc->count_high ++;
#endif
READ_STATE_BIG(sc);
while (num -- > 0) {
sph_u32 m0, m1, m2, m3, m4, m5, m6, m7;
sph_u32 m8, m9, mA, mB, mC, mD, mE, mF;
INPUT_BIG;
P_BIG;
T_BIG;
buf += 8;
}
WRITE_STATE_BIG(sc);
}
static void
hamsi_big_final(sph_hamsi_big_context *sc, const unsigned char *buf)
{
sph_u32 m0, m1, m2, m3, m4, m5, m6, m7;
sph_u32 m8, m9, mA, mB, mC, mD, mE, mF;
DECL_STATE_BIG
READ_STATE_BIG(sc);
INPUT_BIG;
PF_BIG;
T_BIG;
WRITE_STATE_BIG(sc);
}
static void
hamsi_big_init(sph_hamsi_big_context *sc, const sph_u32 *iv)
{
sc->partial_len = 0;
memcpy(sc->h, iv, sizeof sc->h);
#if SPH_64
sc->count = 0;
#else
sc->count_high = sc->count_low = 0;
#endif
}
static void
hamsi_big_core(sph_hamsi_big_context *sc, const void *data, size_t len)
{
if (sc->partial_len != 0) {
size_t mlen;
mlen = 8 - sc->partial_len;
if (len < mlen) {
memcpy(sc->partial + sc->partial_len, data, len);
sc->partial_len += len;
return;
} else {
memcpy(sc->partial + sc->partial_len, data, mlen);
len -= mlen;
data = (const unsigned char *)data + mlen;
hamsi_big(sc, sc->partial, 1);
sc->partial_len = 0;
}
}
hamsi_big(sc, data, (len >> 3));
data = (const unsigned char *)data + (len & ~(size_t)7);
len &= (size_t)7;
memcpy(sc->partial, data, len);
sc->partial_len = len;
}
static void
hamsi_big_close(sph_hamsi_big_context *sc,
unsigned ub, unsigned n, void *dst, size_t out_size_w32)
{
unsigned char pad[8];
size_t ptr, u;
unsigned z;
unsigned char *out;
ptr = sc->partial_len;
#if SPH_64
sph_enc64be(pad, sc->count + (ptr << 3) + n);
#else
sph_enc32be(pad, sc->count_high);
sph_enc32be(pad + 4, sc->count_low + (ptr << 3) + n);
#endif
z = 0x80 >> n;
sc->partial[ptr ++] = ((ub & -z) | z) & 0xFF;
while (ptr < 8)
sc->partial[ptr ++] = 0;
hamsi_big(sc, sc->partial, 1);
hamsi_big_final(sc, pad);
out = dst;
if (out_size_w32 == 12) {
sph_enc32be(out + 0, sc->h[ 0]);
sph_enc32be(out + 4, sc->h[ 1]);
sph_enc32be(out + 8, sc->h[ 3]);
sph_enc32be(out + 12, sc->h[ 4]);
sph_enc32be(out + 16, sc->h[ 5]);
sph_enc32be(out + 20, sc->h[ 6]);
sph_enc32be(out + 24, sc->h[ 8]);
sph_enc32be(out + 28, sc->h[ 9]);
sph_enc32be(out + 32, sc->h[10]);
sph_enc32be(out + 36, sc->h[12]);
sph_enc32be(out + 40, sc->h[13]);
sph_enc32be(out + 44, sc->h[15]);
} else {
for (u = 0; u < 16; u ++)
sph_enc32be(out + (u << 2), sc->h[u]);
}
}
/* see sph_hamsi.h */
void
sph_hamsi224_init(void *cc)
{
hamsi_small_init(cc, IV224);
}
/* see sph_hamsi.h */
void
sph_hamsi224(void *cc, const void *data, size_t len)
{
hamsi_small_core(cc, data, len);
}
/* see sph_hamsi.h */
void
sph_hamsi224_close(void *cc, void *dst)
{
hamsi_small_close(cc, 0, 0, dst, 7);
hamsi_small_init(cc, IV224);
}
/* see sph_hamsi.h */
void
sph_hamsi224_addbits_and_close(void *cc, unsigned ub, unsigned n, void *dst)
{
hamsi_small_close(cc, ub, n, dst, 7);
hamsi_small_init(cc, IV224);
}
/* see sph_hamsi.h */
void
sph_hamsi256_init(void *cc)
{
hamsi_small_init(cc, IV256);
}
/* see sph_hamsi.h */
void
sph_hamsi256(void *cc, const void *data, size_t len)
{
hamsi_small_core(cc, data, len);
}
/* see sph_hamsi.h */
void
sph_hamsi256_close(void *cc, void *dst)
{
hamsi_small_close(cc, 0, 0, dst, 8);
hamsi_small_init(cc, IV256);
}
/* see sph_hamsi.h */
void
sph_hamsi256_addbits_and_close(void *cc, unsigned ub, unsigned n, void *dst)
{
hamsi_small_close(cc, ub, n, dst, 8);
hamsi_small_init(cc, IV256);
}
/* see sph_hamsi.h */
void
sph_hamsi384_init(void *cc)
{
hamsi_big_init(cc, IV384);
}
/* see sph_hamsi.h */
void
sph_hamsi384(void *cc, const void *data, size_t len)
{
hamsi_big_core(cc, data, len);
}
/* see sph_hamsi.h */
void
sph_hamsi384_close(void *cc, void *dst)
{
hamsi_big_close(cc, 0, 0, dst, 12);
hamsi_big_init(cc, IV384);
}
/* see sph_hamsi.h */
void
sph_hamsi384_addbits_and_close(void *cc, unsigned ub, unsigned n, void *dst)
{
hamsi_big_close(cc, ub, n, dst, 12);
hamsi_big_init(cc, IV384);
}
/* see sph_hamsi.h */
void
sph_hamsi512_init(void *cc)
{
hamsi_big_init(cc, IV512);
}
/* see sph_hamsi.h */
void
sph_hamsi512(void *cc, const void *data, size_t len)
{
hamsi_big_core(cc, data, len);
}
/* see sph_hamsi.h */
void
sph_hamsi512_close(void *cc, void *dst)
{
hamsi_big_close(cc, 0, 0, dst, 16);
hamsi_big_init(cc, IV512);
}
/* see sph_hamsi.h */
void
sph_hamsi512_addbits_and_close(void *cc, unsigned ub, unsigned n, void *dst)
{
hamsi_big_close(cc, ub, n, dst, 16);
hamsi_big_init(cc, IV512);
}
#ifdef __cplusplus
}
#endif