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keccak.c
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keccak.c
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/* keccak.c - SHA3 hash functions
* Copyright (C) 2015 g10 Code GmbH
*
* This file is part of Libgcrypt.
*
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <string.h>
#include "g10lib.h"
#include "bithelp.h"
#include "bufhelp.h"
#include "cipher.h"
#include "hash-common.h"
/* USE_64BIT indicates whether to use 64-bit generic implementation.
* USE_32BIT indicates whether to use 32-bit generic implementation. */
#undef USE_64BIT
#if defined(__x86_64__) || SIZEOF_UNSIGNED_LONG == 8
# define USE_64BIT 1
#else
# define USE_32BIT 1
#endif
/* USE_64BIT_BMI2 indicates whether to compile with 64-bit Intel BMI2 code. */
#undef USE_64BIT_BMI2
#if defined(USE_64BIT) && defined(HAVE_GCC_INLINE_ASM_BMI2) && \
defined(HAVE_CPU_ARCH_X86)
# define USE_64BIT_BMI2 1
#endif
/* USE_64BIT_SHLD indicates whether to compile with 64-bit Intel SHLD code. */
#undef USE_64BIT_SHLD
#if defined(USE_64BIT) && defined (__GNUC__) && defined(__x86_64__) && \
defined(HAVE_CPU_ARCH_X86)
# define USE_64BIT_SHLD 1
#endif
/* USE_32BIT_BMI2 indicates whether to compile with 32-bit Intel BMI2 code. */
#undef USE_32BIT_BMI2
#if defined(USE_32BIT) && defined(HAVE_GCC_INLINE_ASM_BMI2) && \
defined(HAVE_CPU_ARCH_X86)
# define USE_32BIT_BMI2 1
#endif
/* USE_64BIT_AVX512 indicates whether to compile with Intel AVX512 code. */
#undef USE_64BIT_AVX512
#if defined(USE_64BIT) && defined(__x86_64__) && \
defined(HAVE_GCC_INLINE_ASM_AVX512) && \
(defined(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS) || \
defined(HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS))
# define USE_64BIT_AVX512 1
#endif
/* USE_64BIT_ARM_NEON indicates whether to enable 64-bit ARM/NEON assembly
* code. */
#undef USE_64BIT_ARM_NEON
#ifdef ENABLE_NEON_SUPPORT
# if defined(HAVE_ARM_ARCH_V6) && defined(__ARMEL__) \
&& defined(HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS) \
&& defined(HAVE_GCC_INLINE_ASM_NEON)
# define USE_64BIT_ARM_NEON 1
# endif
#endif /*ENABLE_NEON_SUPPORT*/
/* USE_S390X_CRYPTO indicates whether to enable zSeries code. */
#undef USE_S390X_CRYPTO
#if defined(HAVE_GCC_INLINE_ASM_S390X)
# define USE_S390X_CRYPTO 1
#endif /* USE_S390X_CRYPTO */
/* x86-64 vector register assembly implementations use SystemV ABI, ABI
* conversion needed on Win64 through function attribute. */
#undef ASM_FUNC_ABI
#if defined(USE_64BIT_AVX512) && defined(HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS)
# define ASM_FUNC_ABI __attribute__((sysv_abi))
#else
# define ASM_FUNC_ABI
#endif
#if defined(USE_64BIT) || defined(USE_64BIT_ARM_NEON)
# define NEED_COMMON64 1
#endif
#ifdef USE_32BIT
# define NEED_COMMON32BI 1
#endif
#define SHA3_DELIMITED_SUFFIX 0x06
#define SHAKE_DELIMITED_SUFFIX 0x1F
#define CSHAKE_DELIMITED_SUFFIX 0x04
typedef struct
{
union {
#ifdef NEED_COMMON64
u64 state64[25];
#endif
#ifdef NEED_COMMON32BI
u32 state32bi[50];
#endif
} u;
} KECCAK_STATE;
typedef struct
{
unsigned int (*permute)(KECCAK_STATE *hd);
unsigned int (*absorb)(KECCAK_STATE *hd, int pos, const byte *lanes,
size_t nlanes, int blocklanes);
unsigned int (*extract) (KECCAK_STATE *hd, unsigned int pos, byte *outbuf,
unsigned int outlen);
} keccak_ops_t;
typedef struct KECCAK_CONTEXT_S
{
KECCAK_STATE state;
unsigned int outlen;
unsigned int blocksize;
unsigned int count;
unsigned int suffix:8;
unsigned int shake_in_extract_mode:1;
unsigned int shake_in_read_mode:1;
const keccak_ops_t *ops;
#ifdef USE_S390X_CRYPTO
unsigned int kimd_func;
unsigned int buf_pos;
byte buf[1344 / 8]; /* SHAKE128 requires biggest buffer, 1344 bits. */
#endif
} KECCAK_CONTEXT;
#ifdef NEED_COMMON64
const u64 _gcry_keccak_round_consts_64bit[24 + 1] =
{
U64_C(0x0000000000000001), U64_C(0x0000000000008082),
U64_C(0x800000000000808A), U64_C(0x8000000080008000),
U64_C(0x000000000000808B), U64_C(0x0000000080000001),
U64_C(0x8000000080008081), U64_C(0x8000000000008009),
U64_C(0x000000000000008A), U64_C(0x0000000000000088),
U64_C(0x0000000080008009), U64_C(0x000000008000000A),
U64_C(0x000000008000808B), U64_C(0x800000000000008B),
U64_C(0x8000000000008089), U64_C(0x8000000000008003),
U64_C(0x8000000000008002), U64_C(0x8000000000000080),
U64_C(0x000000000000800A), U64_C(0x800000008000000A),
U64_C(0x8000000080008081), U64_C(0x8000000000008080),
U64_C(0x0000000080000001), U64_C(0x8000000080008008),
U64_C(0xFFFFFFFFFFFFFFFF)
};
static unsigned int
keccak_extract64(KECCAK_STATE *hd, unsigned int pos, byte *outbuf,
unsigned int outlen)
{
unsigned int i;
/* NOTE: when pos == 0, hd and outbuf may point to same memory (SHA-3). */
for (i = pos; i < pos + outlen / 8 + !!(outlen % 8); i++)
{
u64 tmp = hd->u.state64[i];
buf_put_le64(outbuf, tmp);
outbuf += 8;
}
return 0;
}
#endif /* NEED_COMMON64 */
#ifdef NEED_COMMON32BI
static const u32 round_consts_32bit[2 * 24] =
{
0x00000001UL, 0x00000000UL, 0x00000000UL, 0x00000089UL,
0x00000000UL, 0x8000008bUL, 0x00000000UL, 0x80008080UL,
0x00000001UL, 0x0000008bUL, 0x00000001UL, 0x00008000UL,
0x00000001UL, 0x80008088UL, 0x00000001UL, 0x80000082UL,
0x00000000UL, 0x0000000bUL, 0x00000000UL, 0x0000000aUL,
0x00000001UL, 0x00008082UL, 0x00000000UL, 0x00008003UL,
0x00000001UL, 0x0000808bUL, 0x00000001UL, 0x8000000bUL,
0x00000001UL, 0x8000008aUL, 0x00000001UL, 0x80000081UL,
0x00000000UL, 0x80000081UL, 0x00000000UL, 0x80000008UL,
0x00000000UL, 0x00000083UL, 0x00000000UL, 0x80008003UL,
0x00000001UL, 0x80008088UL, 0x00000000UL, 0x80000088UL,
0x00000001UL, 0x00008000UL, 0x00000000UL, 0x80008082UL
};
static unsigned int
keccak_extract32bi(KECCAK_STATE *hd, unsigned int pos, byte *outbuf,
unsigned int outlen)
{
unsigned int i;
u32 x0;
u32 x1;
u32 t;
/* NOTE: when pos == 0, hd and outbuf may point to same memory (SHA-3). */
for (i = pos; i < pos + outlen / 8 + !!(outlen % 8); i++)
{
x0 = hd->u.state32bi[i * 2 + 0];
x1 = hd->u.state32bi[i * 2 + 1];
t = (x0 & 0x0000FFFFUL) + (x1 << 16);
x1 = (x0 >> 16) + (x1 & 0xFFFF0000UL);
x0 = t;
t = (x0 ^ (x0 >> 8)) & 0x0000FF00UL; x0 = x0 ^ t ^ (t << 8);
t = (x0 ^ (x0 >> 4)) & 0x00F000F0UL; x0 = x0 ^ t ^ (t << 4);
t = (x0 ^ (x0 >> 2)) & 0x0C0C0C0CUL; x0 = x0 ^ t ^ (t << 2);
t = (x0 ^ (x0 >> 1)) & 0x22222222UL; x0 = x0 ^ t ^ (t << 1);
t = (x1 ^ (x1 >> 8)) & 0x0000FF00UL; x1 = x1 ^ t ^ (t << 8);
t = (x1 ^ (x1 >> 4)) & 0x00F000F0UL; x1 = x1 ^ t ^ (t << 4);
t = (x1 ^ (x1 >> 2)) & 0x0C0C0C0CUL; x1 = x1 ^ t ^ (t << 2);
t = (x1 ^ (x1 >> 1)) & 0x22222222UL; x1 = x1 ^ t ^ (t << 1);
buf_put_le32(&outbuf[0], x0);
buf_put_le32(&outbuf[4], x1);
outbuf += 8;
}
return 0;
}
static inline void
keccak_absorb_lane32bi(u32 *lane, u32 x0, u32 x1)
{
u32 t;
t = (x0 ^ (x0 >> 1)) & 0x22222222UL; x0 = x0 ^ t ^ (t << 1);
t = (x0 ^ (x0 >> 2)) & 0x0C0C0C0CUL; x0 = x0 ^ t ^ (t << 2);
t = (x0 ^ (x0 >> 4)) & 0x00F000F0UL; x0 = x0 ^ t ^ (t << 4);
t = (x0 ^ (x0 >> 8)) & 0x0000FF00UL; x0 = x0 ^ t ^ (t << 8);
t = (x1 ^ (x1 >> 1)) & 0x22222222UL; x1 = x1 ^ t ^ (t << 1);
t = (x1 ^ (x1 >> 2)) & 0x0C0C0C0CUL; x1 = x1 ^ t ^ (t << 2);
t = (x1 ^ (x1 >> 4)) & 0x00F000F0UL; x1 = x1 ^ t ^ (t << 4);
t = (x1 ^ (x1 >> 8)) & 0x0000FF00UL; x1 = x1 ^ t ^ (t << 8);
lane[0] ^= (x0 & 0x0000FFFFUL) + (x1 << 16);
lane[1] ^= (x0 >> 16) + (x1 & 0xFFFF0000UL);
}
#endif /* NEED_COMMON32BI */
/* Construct generic 64-bit implementation. */
#ifdef USE_64BIT
#if __GNUC__ >= 4 && defined(__x86_64__)
static inline void absorb_lanes64_8(u64 *dst, const byte *in)
{
asm ("movdqu 0*16(%[dst]), %%xmm0\n\t"
"movdqu 0*16(%[in]), %%xmm4\n\t"
"movdqu 1*16(%[dst]), %%xmm1\n\t"
"movdqu 1*16(%[in]), %%xmm5\n\t"
"movdqu 2*16(%[dst]), %%xmm2\n\t"
"movdqu 3*16(%[dst]), %%xmm3\n\t"
"pxor %%xmm4, %%xmm0\n\t"
"pxor %%xmm5, %%xmm1\n\t"
"movdqu 2*16(%[in]), %%xmm4\n\t"
"movdqu 3*16(%[in]), %%xmm5\n\t"
"movdqu %%xmm0, 0*16(%[dst])\n\t"
"pxor %%xmm4, %%xmm2\n\t"
"movdqu %%xmm1, 1*16(%[dst])\n\t"
"pxor %%xmm5, %%xmm3\n\t"
"movdqu %%xmm2, 2*16(%[dst])\n\t"
"movdqu %%xmm3, 3*16(%[dst])\n\t"
:
: [dst] "r" (dst), [in] "r" (in)
: "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "memory");
}
static inline void absorb_lanes64_4(u64 *dst, const byte *in)
{
asm ("movdqu 0*16(%[dst]), %%xmm0\n\t"
"movdqu 0*16(%[in]), %%xmm4\n\t"
"movdqu 1*16(%[dst]), %%xmm1\n\t"
"movdqu 1*16(%[in]), %%xmm5\n\t"
"pxor %%xmm4, %%xmm0\n\t"
"pxor %%xmm5, %%xmm1\n\t"
"movdqu %%xmm0, 0*16(%[dst])\n\t"
"movdqu %%xmm1, 1*16(%[dst])\n\t"
:
: [dst] "r" (dst), [in] "r" (in)
: "xmm0", "xmm1", "xmm4", "xmm5", "memory");
}
static inline void absorb_lanes64_2(u64 *dst, const byte *in)
{
asm ("movdqu 0*16(%[dst]), %%xmm0\n\t"
"movdqu 0*16(%[in]), %%xmm4\n\t"
"pxor %%xmm4, %%xmm0\n\t"
"movdqu %%xmm0, 0*16(%[dst])\n\t"
:
: [dst] "r" (dst), [in] "r" (in)
: "xmm0", "xmm4", "memory");
}
#else /* __x86_64__ */
static inline void absorb_lanes64_8(u64 *dst, const byte *in)
{
dst[0] ^= buf_get_le64(in + 8 * 0);
dst[1] ^= buf_get_le64(in + 8 * 1);
dst[2] ^= buf_get_le64(in + 8 * 2);
dst[3] ^= buf_get_le64(in + 8 * 3);
dst[4] ^= buf_get_le64(in + 8 * 4);
dst[5] ^= buf_get_le64(in + 8 * 5);
dst[6] ^= buf_get_le64(in + 8 * 6);
dst[7] ^= buf_get_le64(in + 8 * 7);
}
static inline void absorb_lanes64_4(u64 *dst, const byte *in)
{
dst[0] ^= buf_get_le64(in + 8 * 0);
dst[1] ^= buf_get_le64(in + 8 * 1);
dst[2] ^= buf_get_le64(in + 8 * 2);
dst[3] ^= buf_get_le64(in + 8 * 3);
}
static inline void absorb_lanes64_2(u64 *dst, const byte *in)
{
dst[0] ^= buf_get_le64(in + 8 * 0);
dst[1] ^= buf_get_le64(in + 8 * 1);
}
#endif /* !__x86_64__ */
static inline void absorb_lanes64_1(u64 *dst, const byte *in)
{
dst[0] ^= buf_get_le64(in + 8 * 0);
}
# define ANDN64(x, y) (~(x) & (y))
# define ROL64(x, n) (((x) << ((unsigned int)n & 63)) | \
((x) >> ((64 - (unsigned int)(n)) & 63)))
# define KECCAK_F1600_PERMUTE_FUNC_NAME keccak_f1600_state_permute64
# define KECCAK_F1600_ABSORB_FUNC_NAME keccak_absorb_lanes64
# include "keccak_permute_64.h"
# undef ANDN64
# undef ROL64
# undef KECCAK_F1600_PERMUTE_FUNC_NAME
# undef KECCAK_F1600_ABSORB_FUNC_NAME
static const keccak_ops_t keccak_generic64_ops =
{
.permute = keccak_f1600_state_permute64,
.absorb = keccak_absorb_lanes64,
.extract = keccak_extract64,
};
#endif /* USE_64BIT */
/* Construct 64-bit Intel SHLD implementation. */
#ifdef USE_64BIT_SHLD
# define ANDN64(x, y) (~(x) & (y))
# define ROL64(x, n) ({ \
u64 tmp = (x); \
asm ("shldq %1, %0, %0" \
: "+r" (tmp) \
: "J" ((n) & 63) \
: "cc"); \
tmp; })
# define KECCAK_F1600_PERMUTE_FUNC_NAME keccak_f1600_state_permute64_shld
# define KECCAK_F1600_ABSORB_FUNC_NAME keccak_absorb_lanes64_shld
# include "keccak_permute_64.h"
# undef ANDN64
# undef ROL64
# undef KECCAK_F1600_PERMUTE_FUNC_NAME
# undef KECCAK_F1600_ABSORB_FUNC_NAME
static const keccak_ops_t keccak_shld_64_ops =
{
.permute = keccak_f1600_state_permute64_shld,
.absorb = keccak_absorb_lanes64_shld,
.extract = keccak_extract64,
};
#endif /* USE_64BIT_SHLD */
/* Construct 64-bit Intel BMI2 implementation. */
#ifdef USE_64BIT_BMI2
# define ANDN64(x, y) ({ \
u64 tmp; \
asm ("andnq %2, %1, %0" \
: "=r" (tmp) \
: "r0" (x), "rm" (y)); \
tmp; })
# define ROL64(x, n) ({ \
u64 tmp; \
asm ("rorxq %2, %1, %0" \
: "=r" (tmp) \
: "rm0" (x), "J" (64 - ((n) & 63))); \
tmp; })
# define KECCAK_F1600_PERMUTE_FUNC_NAME keccak_f1600_state_permute64_bmi2
# define KECCAK_F1600_ABSORB_FUNC_NAME keccak_absorb_lanes64_bmi2
# include "keccak_permute_64.h"
# undef ANDN64
# undef ROL64
# undef KECCAK_F1600_PERMUTE_FUNC_NAME
# undef KECCAK_F1600_ABSORB_FUNC_NAME
static const keccak_ops_t keccak_bmi2_64_ops =
{
.permute = keccak_f1600_state_permute64_bmi2,
.absorb = keccak_absorb_lanes64_bmi2,
.extract = keccak_extract64,
};
#endif /* USE_64BIT_BMI2 */
/* 64-bit Intel AVX512 implementation. */
#ifdef USE_64BIT_AVX512
extern ASM_FUNC_ABI unsigned int
_gcry_keccak_f1600_state_permute64_avx512(u64 *state, const u64 *rconst);
extern ASM_FUNC_ABI unsigned int
_gcry_keccak_absorb_blocks_avx512(u64 *state, const u64 *rconst,
const byte *lanes, u64 nlanes,
u64 blocklanes, u64 *new_lanes);
static unsigned int
keccak_f1600_state_permute64_avx512(KECCAK_STATE *hd)
{
return _gcry_keccak_f1600_state_permute64_avx512 (
hd->u.state64, _gcry_keccak_round_consts_64bit);
}
static unsigned int
keccak_absorb_lanes64_avx512(KECCAK_STATE *hd, int pos, const byte *lanes,
size_t nlanes, int blocklanes)
{
while (nlanes)
{
if (pos == 0 && blocklanes > 0 && nlanes >= (size_t)blocklanes)
{
/* Get new pointer through u64 variable for "x32" compatibility. */
u64 new_lanes;
nlanes = _gcry_keccak_absorb_blocks_avx512 (
hd->u.state64, _gcry_keccak_round_consts_64bit,
lanes, nlanes, blocklanes, &new_lanes);
lanes = (const byte *)(uintptr_t)new_lanes;
}
while (nlanes)
{
hd->u.state64[pos] ^= buf_get_le64 (lanes);
lanes += 8;
nlanes--;
if (++pos == blocklanes)
{
keccak_f1600_state_permute64_avx512 (hd);
pos = 0;
break;
}
}
}
return 0;
}
static const keccak_ops_t keccak_avx512_64_ops =
{
.permute = keccak_f1600_state_permute64_avx512,
.absorb = keccak_absorb_lanes64_avx512,
.extract = keccak_extract64,
};
#endif /* USE_64BIT_AVX512 */
/* 64-bit ARMv7/NEON implementation. */
#ifdef USE_64BIT_ARM_NEON
unsigned int _gcry_keccak_permute_armv7_neon(u64 *state);
unsigned int _gcry_keccak_absorb_lanes64_armv7_neon(u64 *state, int pos,
const byte *lanes,
size_t nlanes,
int blocklanes);
static unsigned int keccak_permute64_armv7_neon(KECCAK_STATE *hd)
{
return _gcry_keccak_permute_armv7_neon(hd->u.state64);
}
static unsigned int
keccak_absorb_lanes64_armv7_neon(KECCAK_STATE *hd, int pos, const byte *lanes,
size_t nlanes, int blocklanes)
{
if (blocklanes < 0)
{
/* blocklanes == -1, permutationless absorb from keccak_final. */
while (nlanes)
{
hd->u.state64[pos] ^= buf_get_le64(lanes);
lanes += 8;
nlanes--;
}
return 0;
}
else
{
return _gcry_keccak_absorb_lanes64_armv7_neon(hd->u.state64, pos, lanes,
nlanes, blocklanes);
}
}
static const keccak_ops_t keccak_armv7_neon_64_ops =
{
.permute = keccak_permute64_armv7_neon,
.absorb = keccak_absorb_lanes64_armv7_neon,
.extract = keccak_extract64,
};
#endif /* USE_64BIT_ARM_NEON */
/* Construct generic 32-bit implementation. */
#ifdef USE_32BIT
# define ANDN32(x, y) (~(x) & (y))
# define ROL32(x, n) (((x) << ((unsigned int)n & 31)) | \
((x) >> ((32 - (unsigned int)(n)) & 31)))
# define KECCAK_F1600_PERMUTE_FUNC_NAME keccak_f1600_state_permute32bi
# include "keccak_permute_32.h"
# undef ANDN32
# undef ROL32
# undef KECCAK_F1600_PERMUTE_FUNC_NAME
static unsigned int
keccak_absorb_lanes32bi(KECCAK_STATE *hd, int pos, const byte *lanes,
size_t nlanes, int blocklanes)
{
unsigned int burn = 0;
while (nlanes)
{
keccak_absorb_lane32bi(&hd->u.state32bi[pos * 2],
buf_get_le32(lanes + 0),
buf_get_le32(lanes + 4));
lanes += 8;
nlanes--;
if (++pos == blocklanes)
{
burn = keccak_f1600_state_permute32bi(hd);
pos = 0;
}
}
return burn;
}
static const keccak_ops_t keccak_generic32bi_ops =
{
.permute = keccak_f1600_state_permute32bi,
.absorb = keccak_absorb_lanes32bi,
.extract = keccak_extract32bi,
};
#endif /* USE_32BIT */
/* Construct 32-bit Intel BMI2 implementation. */
#ifdef USE_32BIT_BMI2
# define ANDN32(x, y) ({ \
u32 tmp; \
asm ("andnl %2, %1, %0" \
: "=r" (tmp) \
: "r0" (x), "rm" (y)); \
tmp; })
# define ROL32(x, n) ({ \
u32 tmp; \
asm ("rorxl %2, %1, %0" \
: "=r" (tmp) \
: "rm0" (x), "J" (32 - ((n) & 31))); \
tmp; })
# define KECCAK_F1600_PERMUTE_FUNC_NAME keccak_f1600_state_permute32bi_bmi2
# include "keccak_permute_32.h"
# undef ANDN32
# undef ROL32
# undef KECCAK_F1600_PERMUTE_FUNC_NAME
static inline u32 pext(u32 x, u32 mask)
{
u32 tmp;
asm ("pextl %2, %1, %0" : "=r" (tmp) : "r0" (x), "rm" (mask));
return tmp;
}
static inline u32 pdep(u32 x, u32 mask)
{
u32 tmp;
asm ("pdepl %2, %1, %0" : "=r" (tmp) : "r0" (x), "rm" (mask));
return tmp;
}
static inline void
keccak_absorb_lane32bi_bmi2(u32 *lane, u32 x0, u32 x1)
{
x0 = pdep(pext(x0, 0x55555555), 0x0000ffff) | (pext(x0, 0xaaaaaaaa) << 16);
x1 = pdep(pext(x1, 0x55555555), 0x0000ffff) | (pext(x1, 0xaaaaaaaa) << 16);
lane[0] ^= (x0 & 0x0000FFFFUL) + (x1 << 16);
lane[1] ^= (x0 >> 16) + (x1 & 0xFFFF0000UL);
}
static unsigned int
keccak_absorb_lanes32bi_bmi2(KECCAK_STATE *hd, int pos, const byte *lanes,
size_t nlanes, int blocklanes)
{
unsigned int burn = 0;
while (nlanes)
{
keccak_absorb_lane32bi_bmi2(&hd->u.state32bi[pos * 2],
buf_get_le32(lanes + 0),
buf_get_le32(lanes + 4));
lanes += 8;
nlanes--;
if (++pos == blocklanes)
{
burn = keccak_f1600_state_permute32bi_bmi2(hd);
pos = 0;
}
}
return burn;
}
static unsigned int
keccak_extract32bi_bmi2(KECCAK_STATE *hd, unsigned int pos, byte *outbuf,
unsigned int outlen)
{
unsigned int i;
u32 x0;
u32 x1;
u32 t;
/* NOTE: when pos == 0, hd and outbuf may point to same memory (SHA-3). */
for (i = pos; i < pos + outlen / 8 + !!(outlen % 8); i++)
{
x0 = hd->u.state32bi[i * 2 + 0];
x1 = hd->u.state32bi[i * 2 + 1];
t = (x0 & 0x0000FFFFUL) + (x1 << 16);
x1 = (x0 >> 16) + (x1 & 0xFFFF0000UL);
x0 = t;
x0 = pdep(pext(x0, 0xffff0001), 0xaaaaaaab) | pdep(x0 >> 1, 0x55555554);
x1 = pdep(pext(x1, 0xffff0001), 0xaaaaaaab) | pdep(x1 >> 1, 0x55555554);
buf_put_le32(&outbuf[0], x0);
buf_put_le32(&outbuf[4], x1);
outbuf += 8;
}
return 0;
}
static const keccak_ops_t keccak_bmi2_32bi_ops =
{
.permute = keccak_f1600_state_permute32bi_bmi2,
.absorb = keccak_absorb_lanes32bi_bmi2,
.extract = keccak_extract32bi_bmi2,
};
#endif /* USE_32BIT_BMI2 */
#ifdef USE_S390X_CRYPTO
#include "asm-inline-s390x.h"
static inline void
keccak_bwrite_s390x (void *context, const byte *in, size_t inlen)
{
KECCAK_CONTEXT *ctx = context;
/* Write full-blocks. */
kimd_execute (ctx->kimd_func, &ctx->state, in, inlen);
return;
}
static inline void
keccak_final_s390x (void *context)
{
KECCAK_CONTEXT *ctx = context;
if (ctx->suffix == SHA3_DELIMITED_SUFFIX)
{
klmd_execute (ctx->kimd_func, &ctx->state, ctx->buf, ctx->count);
}
else
{
klmd_shake_execute (ctx->kimd_func, &ctx->state, NULL, 0, ctx->buf,
ctx->count);
ctx->count = 0;
ctx->buf_pos = 0;
}
return;
}
static inline void
keccak_bextract_s390x (void *context, byte *out, size_t outlen)
{
KECCAK_CONTEXT *ctx = context;
/* Extract full-blocks. */
klmd_shake_execute (ctx->kimd_func | KLMD_PADDING_STATE, &ctx->state,
out, outlen, NULL, 0);
return;
}
static void
keccak_write_s390x (void *context, const byte *inbuf, size_t inlen)
{
KECCAK_CONTEXT *hd = context;
const size_t blocksize = hd->blocksize;
size_t inblocks;
size_t copylen;
while (hd->count)
{
if (hd->count == blocksize) /* Flush the buffer. */
{
keccak_bwrite_s390x (hd, hd->buf, blocksize);
hd->count = 0;
}
else
{
copylen = inlen;
if (copylen > blocksize - hd->count)
copylen = blocksize - hd->count;
if (copylen == 0)
break;
buf_cpy (&hd->buf[hd->count], inbuf, copylen);
hd->count += copylen;
inbuf += copylen;
inlen -= copylen;
}
}
if (inlen == 0)
return;
if (inlen >= blocksize)
{
inblocks = inlen / blocksize;
keccak_bwrite_s390x (hd, inbuf, inblocks * blocksize);
hd->count = 0;
inlen -= inblocks * blocksize;
inbuf += inblocks * blocksize;
}
if (inlen)
{
buf_cpy (hd->buf, inbuf, inlen);
hd->count = inlen;
}
}
static void
keccak_extract_s390x (void *context, void *outbuf_arg, size_t outlen)
{
KECCAK_CONTEXT *hd = context;
const size_t blocksize = hd->blocksize;
byte *outbuf = outbuf_arg;
while (outlen)
{
gcry_assert(hd->count == 0 || hd->buf_pos < hd->count);
if (hd->buf_pos < hd->count && outlen)
{
size_t copylen = hd->count - hd->buf_pos;
if (copylen > outlen)
copylen = outlen;
buf_cpy (outbuf, &hd->buf[hd->buf_pos], copylen);
outbuf += copylen;
outlen -= copylen;
hd->buf_pos += copylen;
}
if (hd->buf_pos == hd->count)
{
hd->buf_pos = 0;
hd->count = 0;
}
if (outlen == 0)
return;
if (outlen >= blocksize)
{
size_t outblocks = outlen / blocksize;
keccak_bextract_s390x (context, outbuf, outblocks * blocksize);
outlen -= outblocks * blocksize;
outbuf += outblocks * blocksize;
if (outlen == 0)
return;
}
keccak_bextract_s390x (context, hd->buf, blocksize);
hd->count = blocksize;
}
}
#endif /* USE_S390X_CRYPTO */
static void
keccak_write (void *context, const void *inbuf_arg, size_t inlen)
{
KECCAK_CONTEXT *ctx = context;
const size_t bsize = ctx->blocksize;
const size_t blocklanes = bsize / 8;
const byte *inbuf = inbuf_arg;
unsigned int nburn, burn = 0;
unsigned int count, i;
unsigned int pos;
size_t nlanes;
#ifdef USE_S390X_CRYPTO
if (ctx->kimd_func)
{
keccak_write_s390x (context, inbuf, inlen);
return;
}
#endif
count = ctx->count;
if (inlen && (count % 8))
{
byte lane[8] = { 0, };
/* Complete absorbing partial input lane. */
pos = count / 8;
for (i = count % 8; inlen && i < 8; i++)
{
lane[i] = *inbuf++;
inlen--;
count++;
}
if (count == bsize)
count = 0;
nburn = ctx->ops->absorb(&ctx->state, pos, lane, 1,
(count % 8) ? -1 : blocklanes);
burn = nburn > burn ? nburn : burn;
}
/* Absorb full input lanes. */
pos = count / 8;
nlanes = inlen / 8;
if (nlanes > 0)
{
nburn = ctx->ops->absorb(&ctx->state, pos, inbuf, nlanes, blocklanes);
burn = nburn > burn ? nburn : burn;
inlen -= nlanes * 8;
inbuf += nlanes * 8;
count = ((size_t) count + nlanes * 8) % bsize;
}
if (inlen)
{
byte lane[8] = { 0, };
/* Absorb remaining partial input lane. */
pos = count / 8;
for (i = count % 8; inlen && i < 8; i++)
{
lane[i] = *inbuf++;
inlen--;
count++;
}
nburn = ctx->ops->absorb(&ctx->state, pos, lane, 1, -1);
burn = nburn > burn ? nburn : burn;
gcry_assert(count < bsize);
}
ctx->count = count;
if (burn)
_gcry_burn_stack (burn);
}
static void
keccak_init (int algo, void *context, unsigned int flags)
{
KECCAK_CONTEXT *ctx = context;
KECCAK_STATE *hd = &ctx->state;
unsigned int features = _gcry_get_hw_features ();
(void)flags;
(void)features;
memset (hd, 0, sizeof *hd);
ctx->count = 0;
ctx->shake_in_extract_mode = 0;
ctx->shake_in_read_mode = 0;
/* Select generic implementation. */
#ifdef USE_64BIT
ctx->ops = &keccak_generic64_ops;
#elif defined USE_32BIT
ctx->ops = &keccak_generic32bi_ops;
#endif
/* Select optimized implementation based in hw features. */
if (0) {}
#ifdef USE_64BIT_AVX512
else if (features & HWF_INTEL_AVX512)
ctx->ops = &keccak_avx512_64_ops;
#endif
#ifdef USE_64BIT_ARM_NEON
else if (features & HWF_ARM_NEON)
ctx->ops = &keccak_armv7_neon_64_ops;
#endif
#ifdef USE_64BIT_BMI2
else if (features & HWF_INTEL_BMI2)
ctx->ops = &keccak_bmi2_64_ops;
#endif
#ifdef USE_32BIT_BMI2
else if (features & HWF_INTEL_BMI2)
ctx->ops = &keccak_bmi2_32bi_ops;
#endif
#ifdef USE_64BIT_SHLD
else if (features & HWF_INTEL_FAST_SHLD)