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ed25519-donna-portable.h
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ed25519-donna-portable.h
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#include "ed25519-donna-portable-identify.h"
#define mul32x32_64(a,b) (((uint64_t)(a))*(b))
/* platform */
#if defined(COMPILER_MSVC)
#include <intrin.h>
#if !defined(_DEBUG) && (defined(CPU_X86) || defined(CPU_X86_64))
#undef mul32x32_64
#define mul32x32_64(a,b) __emulu(a,b)
#endif
#undef inline
#define inline __forceinline
#define DONNA_INLINE __forceinline
#define DONNA_NOINLINE __declspec(noinline)
#define ALIGN(x) __declspec(align(x))
#define ROTL32(a,b) _rotl(a,b)
#define ROTR32(a,b) _rotr(a,b)
#else
#include <sys/param.h>
#define DONNA_INLINE inline __attribute__((always_inline))
#define DONNA_NOINLINE __attribute__((noinline))
#define ALIGN(x) __attribute__((aligned(x)))
#define ROTL32(a,b) (((a) << (b)) | ((a) >> (32 - b)))
#define ROTR32(a,b) (((a) >> (b)) | ((a) << (32 - b)))
#endif
/* uint128_t */
#if defined(CPU_64BITS) && !defined(ED25519_FORCE_32BIT)
#if defined(COMPILER_CLANG) && (COMPILER_CLANG >= 30100)
#define HAVE_NATIVE_UINT128
typedef unsigned __int128 uint128_t;
#elif defined(COMPILER_MSVC)
#define HAVE_UINT128
typedef struct uint128_t {
uint64_t lo, hi;
} uint128_t;
#if defined(CPU_X86_64)
#define mul64x64_128(out,a,b) out.lo = _umul128(a,b,&out.hi);
#define shr128_pair(out,hi,lo,shift) out = __shiftright128(lo, hi, shift);
#define shl128_pair(out, hi, lo, shift) out = __shiftleft128(lo, hi, shift);
#else
#define mul64x64_128(out,a,b) out.lo = ((uint64_t)(a))*(b); out.hi = __umulh(a, b);
// note: these are special purpose functions where shift is expected to be < 64 and != 0
#define shr128_pair(out,hi,lo,shift) out = ((lo) >> shift) | ((hi) << (64 - shift));
#define shl128_pair(out,hi,lo,shift) out = (lo) << shift;
#endif
#define shr128(out,in,shift) shr128_pair(out, in.hi, in.lo, shift)
#define shl128(out,in,shift) shl128_pair(out, in.hi, in.lo, shift)
#define add128(a,b) { uint64_t p = a.lo; a.lo += b.lo; a.hi += b.hi + (a.lo < p); }
#define add128_64(a,b) { uint64_t p = a.lo; a.lo += b; a.hi += (a.lo < p); }
#define lo128(a) (a.lo)
#define hi128(a) (a.hi)
#elif defined(COMPILER_GCC) && !defined(HAVE_NATIVE_UINT128)
#if defined(__SIZEOF_INT128__)
#define HAVE_NATIVE_UINT128
typedef unsigned __int128 uint128_t;
#elif (COMPILER_GCC >= 40400)
#define HAVE_NATIVE_UINT128
typedef unsigned uint128_t __attribute__((mode(TI)));
#elif defined(CPU_X86_64)
#define HAVE_UINT128
typedef struct uint128_t {
uint64_t lo, hi;
} uint128_t;
#define mul64x64_128(out,a,b) __asm__ ("mulq %3" : "=a" (out.lo), "=d" (out.hi) : "a" (a), "rm" (b));
#define shr128_pair(out,hi,lo,shift) __asm__ ("shrdq %2,%1,%0" : "+r" (lo) : "r" (hi), "J" (shift)); out = lo;
#define shl128_pair(out,hi,lo,shift) __asm__ ("shldq %2,%1,%0" : "+r" (hi) : "r" (lo), "J" (shift)); out = hi;
#define shr128(out,in,shift) shr128_pair(out,in.hi, in.lo, shift)
#define shl128(out,in,shift) shl128_pair(out,in.hi, in.lo, shift)
#define add128(a,b) __asm__ ("addq %4,%2; adcq %5,%3" : "=r" (a.hi), "=r" (a.lo) : "1" (a.lo), "0" (a.hi), "rm" (b.lo), "rm" (b.hi) : "cc");
#define add128_64(a,b) __asm__ ("addq %4,%2; adcq $0,%3" : "=r" (a.hi), "=r" (a.lo) : "1" (a.lo), "0" (a.hi), "rm" (b) : "cc");
#define lo128(a) (a.lo)
#define hi128(a) (a.hi)
#endif
#endif
#if defined(HAVE_NATIVE_UINT128)
#define HAVE_UINT128
#define mul64x64_128(out,a,b) out = (uint128_t)a * b;
#define shr128_pair(out,hi,lo,shift) out = (uint64_t)((((uint128_t)hi << 64) | lo) >> (shift));
#define shl128_pair(out,hi,lo,shift) out = (uint64_t)(((((uint128_t)hi << 64) | lo) << (shift)) >> 64);
#define shr128(out,in,shift) out = (uint64_t)(in >> (shift));
#define shl128(out,in,shift) out = (uint64_t)((in << shift) >> 64);
#define add128(a,b) a += b;
#define add128_64(a,b) a += (uint64_t)b;
#define lo128(a) ((uint64_t)a)
#define hi128(a) ((uint64_t)(a >> 64))
#endif
#if !defined(HAVE_UINT128)
#error Need a uint128_t implementation!
#endif
#endif
/* endian */
#if !defined(ED25519_OPENSSLRNG)
static inline void U32TO8_LE(unsigned char *p, const uint32_t v) {
p[0] = (unsigned char)(v );
p[1] = (unsigned char)(v >> 8);
p[2] = (unsigned char)(v >> 16);
p[3] = (unsigned char)(v >> 24);
}
#endif
#if !defined(HAVE_UINT128)
static inline uint32_t U8TO32_LE(const unsigned char *p) {
return
(((uint32_t)(p[0]) ) |
((uint32_t)(p[1]) << 8) |
((uint32_t)(p[2]) << 16) |
((uint32_t)(p[3]) << 24));
}
#else
static inline uint64_t U8TO64_LE(const unsigned char *p) {
return
(((uint64_t)(p[0]) ) |
((uint64_t)(p[1]) << 8) |
((uint64_t)(p[2]) << 16) |
((uint64_t)(p[3]) << 24) |
((uint64_t)(p[4]) << 32) |
((uint64_t)(p[5]) << 40) |
((uint64_t)(p[6]) << 48) |
((uint64_t)(p[7]) << 56));
}
static inline void U64TO8_LE(unsigned char *p, const uint64_t v) {
p[0] = (unsigned char)(v );
p[1] = (unsigned char)(v >> 8);
p[2] = (unsigned char)(v >> 16);
p[3] = (unsigned char)(v >> 24);
p[4] = (unsigned char)(v >> 32);
p[5] = (unsigned char)(v >> 40);
p[6] = (unsigned char)(v >> 48);
p[7] = (unsigned char)(v >> 56);
}
#endif
#include <stdlib.h>
#include <string.h>