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This commit is contained in:
Frank Denis 2020-08-15 13:51:04 +02:00
parent b2d94a6da1
commit e919f86257
1 changed files with 3 additions and 3 deletions
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6
src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c
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@ -2757,8 +2757,8 @@ ristretto255_sqrt_ratio_m1(fe25519 x, const fe25519 u, const fe25519 v)
fe25519_sq(v3, v); fe25519_sq(v3, v);
fe25519_mul(v3, v3, v); /* v3 = v^3 */ fe25519_mul(v3, v3, v); /* v3 = v^3 */
fe25519_sq(x, v3); fe25519_sq(x, v3);
fe25519_mul(x, x, v); fe25519_mul(x, x, u);
fe25519_mul(x, x, u); /* x = uv^7 */ fe25519_mul(x, x, v); /* x = uv^7 */
fe25519_pow22523(x, x); /* x = (uv^7)^((q-5)/8) */ fe25519_pow22523(x, x); /* x = (uv^7)^((q-5)/8) */
fe25519_mul(x, x, v3); fe25519_mul(x, x, v3);
@ -2886,7 +2886,7 @@ ristretto255_p3_tobytes(unsigned char *s, const ge25519_p3 *h)
fe25519_mul(ix, h->X, fe25519_sqrtm1); /* ix = X*sqrt(-1) */ fe25519_mul(ix, h->X, fe25519_sqrtm1); /* ix = X*sqrt(-1) */
fe25519_mul(iy, h->Y, fe25519_sqrtm1); /* iy = Y*sqrt(-1) */ fe25519_mul(iy, h->Y, fe25519_sqrtm1); /* iy = Y*sqrt(-1) */
fe25519_mul(eden, den1, ed25519_invsqrtamd); /* eden = den1*sqrt(a-d) */ fe25519_mul(eden, den1, ed25519_invsqrtamd); /* eden = den1/sqrt(a-d) */
fe25519_mul(t_z_inv, h->T, z_inv); /* t_z_inv = T*z_inv */ fe25519_mul(t_z_inv, h->T, z_inv); /* t_z_inv = T*z_inv */
rotate = fe25519_isnegative(t_z_inv); rotate = fe25519_isnegative(t_z_inv);