mirror of
https://github.com/oxen-io/lokinet.git
synced 2024-11-03 23:15:52 +00:00
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
|
|
#include <sodium/crypto_scalarmult_curve25519.h>
|
|
#include <sodium/private/implementations.h>
|
|
#include "scalarmult_curve25519.h"
|
|
#include <sodium/runtime.h>
|
|
|
|
#include "sandy2x/curve25519_sandy2x.h"
|
|
#include "ref10/x25519_ref10.h"
|
|
static const crypto_scalarmult_curve25519_implementation *implementation =
|
|
&crypto_scalarmult_curve25519_ref10_implementation;
|
|
|
|
int
|
|
crypto_scalarmult_curve25519(unsigned char *q, const unsigned char *n,
|
|
const unsigned char *p)
|
|
{
|
|
size_t i;
|
|
volatile unsigned char d = 0;
|
|
|
|
if(implementation->mult(q, n, p) != 0)
|
|
{
|
|
return -1; /* LCOV_EXCL_LINE */
|
|
}
|
|
for(i = 0; i < crypto_scalarmult_curve25519_BYTES; i++)
|
|
{
|
|
d |= q[i];
|
|
}
|
|
return -(1 & ((d - 1) >> 8));
|
|
}
|
|
|
|
int
|
|
crypto_scalarmult_curve25519_base(unsigned char *q, const unsigned char *n)
|
|
{
|
|
return implementation->mult_base(q, n);
|
|
}
|
|
|
|
size_t
|
|
crypto_scalarmult_curve25519_bytes(void)
|
|
{
|
|
return crypto_scalarmult_curve25519_BYTES;
|
|
}
|
|
|
|
size_t
|
|
crypto_scalarmult_curve25519_scalarbytes(void)
|
|
{
|
|
return crypto_scalarmult_curve25519_SCALARBYTES;
|
|
}
|
|
|
|
int
|
|
_crypto_scalarmult_curve25519_pick_best_implementation(void)
|
|
{
|
|
implementation = &crypto_scalarmult_curve25519_ref10_implementation;
|
|
|
|
#ifdef HAVE_AVX_ASM
|
|
if(sodium_runtime_has_avx())
|
|
{
|
|
implementation = &crypto_scalarmult_curve25519_sandy2x_implementation;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|