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