You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
115 lines
2.7 KiB
115 lines
2.7 KiB
/*
|
|
Public domain by Andrew M. <liquidsun@gmail.com>
|
|
Modified from the amd64-51-30k implementation by
|
|
Daniel J. Bernstein
|
|
Niels Duif
|
|
Tanja Lange
|
|
Peter Schwabe
|
|
Bo-Yin Yang
|
|
*/
|
|
|
|
|
|
#include "ed25519-donna-portable.h"
|
|
|
|
#if defined(ED25519_SSE2)
|
|
#else
|
|
#if defined(HAVE_UINT128) && !defined(ED25519_FORCE_32BIT)
|
|
#define ED25519_64BIT
|
|
#else
|
|
#define ED25519_32BIT
|
|
#endif
|
|
#endif
|
|
|
|
#if !defined(ED25519_NO_INLINE_ASM)
|
|
/* detect extra features first so un-needed functions can be disabled throughout */
|
|
#if defined(ED25519_SSE2)
|
|
#if defined(COMPILER_GCC) && defined(CPU_X86)
|
|
#define ED25519_GCC_32BIT_SSE_CHOOSE
|
|
#elif defined(COMPILER_GCC) && defined(CPU_X86_64)
|
|
#define ED25519_GCC_64BIT_SSE_CHOOSE
|
|
#endif
|
|
#else
|
|
#if defined(CPU_X86_64)
|
|
#if defined(COMPILER_GCC)
|
|
#if defined(ED25519_64BIT)
|
|
#define ED25519_GCC_64BIT_X86_CHOOSE
|
|
#else
|
|
#define ED25519_GCC_64BIT_32BIT_CHOOSE
|
|
#endif
|
|
#endif
|
|
#endif
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(ED25519_SSE2)
|
|
#include "curve25519-donna-sse2.h"
|
|
#elif defined(ED25519_64BIT)
|
|
#include "curve25519-donna-64bit.h"
|
|
#else
|
|
#include "curve25519-donna-32bit.h"
|
|
#endif
|
|
|
|
#include "curve25519-donna-helpers.h"
|
|
|
|
/* separate uint128 check for 64 bit sse2 */
|
|
#if defined(HAVE_UINT128) && !defined(ED25519_FORCE_32BIT)
|
|
#include "modm-donna-64bit.h"
|
|
#else
|
|
#include "modm-donna-32bit.h"
|
|
#endif
|
|
|
|
typedef unsigned char hash_512bits[64];
|
|
|
|
/*
|
|
Timing safe memory compare
|
|
*/
|
|
static int
|
|
ed25519_verify(const unsigned char *x, const unsigned char *y, size_t len) {
|
|
size_t differentbits = 0;
|
|
while (len--)
|
|
differentbits |= (*x++ ^ *y++);
|
|
return (int) (1 & ((differentbits - 1) >> 8));
|
|
}
|
|
|
|
|
|
/*
|
|
* Arithmetic on the twisted Edwards curve -x^2 + y^2 = 1 + dx^2y^2
|
|
* with d = -(121665/121666) = 37095705934669439343138083508754565189542113879843219016388785533085940283555
|
|
* Base point: (15112221349535400772501151409588531511454012693041857206046113283949847762202,46316835694926478169428394003475163141307993866256225615783033603165251855960);
|
|
*/
|
|
|
|
typedef struct ge25519_t {
|
|
bignum25519 x, y, z, t;
|
|
} ge25519;
|
|
|
|
typedef struct ge25519_p1p1_t {
|
|
bignum25519 x, y, z, t;
|
|
} ge25519_p1p1;
|
|
|
|
typedef struct ge25519_niels_t {
|
|
bignum25519 ysubx, xaddy, t2d;
|
|
} ge25519_niels;
|
|
|
|
typedef struct ge25519_pniels_t {
|
|
bignum25519 ysubx, xaddy, z, t2d;
|
|
} ge25519_pniels;
|
|
|
|
#include "ed25519-donna-basepoint-table.h"
|
|
|
|
#if defined(ED25519_64BIT)
|
|
#include "ed25519-donna-64bit-tables.h"
|
|
#include "ed25519-donna-64bit-x86.h"
|
|
#else
|
|
#include "ed25519-donna-32bit-tables.h"
|
|
#include "ed25519-donna-64bit-x86-32bit.h"
|
|
#endif
|
|
|
|
|
|
#if defined(ED25519_SSE2)
|
|
#include "ed25519-donna-32bit-sse2.h"
|
|
#include "ed25519-donna-64bit-sse2.h"
|
|
#include "ed25519-donna-impl-sse2.h"
|
|
#else
|
|
#include "ed25519-donna-impl-base.h"
|
|
#endif
|
|
|