forked from lthn/blockchain
crypto: ge_mul8_p3 and sc_muladd implemented
This commit is contained in:
sowle
parent
aac094ce4b
commit
670bacbf3f
2 changed files with 519 additions and 11 deletions
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@ -2259,17 +2259,17 @@ void ge_fromfe_frombytes_vartime(ge_p2 *r, const unsigned char *s) {
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/* End fe_frombytes.c */
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fe_sq2(v, u); /* 2 * u^2 */
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fe_1(w);
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fe_add(w, v, w); /* w = 2 * u^2 + 1 */
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fe_sq(x, w); /* w^2 */
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fe_mul(y, fe_ma2, v); /* -2 * A^2 * u^2 */
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fe_add(x, x, y); /* x = w^2 - 2 * A^2 * u^2 */
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fe_divpowm1(r->X, w, x); /* (w / x)^(m + 1) */
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fe_sq(y, r->X);
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fe_mul(x, y, x);
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fe_sub(y, w, x);
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fe_copy(z, fe_ma);
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fe_sq2(v, u); /* v = 2 * u^2 */
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fe_1(w); /* w = 1 */
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fe_add(w, v, w); /* w = 2 * u^2 + 1 */
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fe_sq(x, w); /* x = w^2 */
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fe_mul(y, fe_ma2, v); /* y = -A^2 * (2 * u^2) = -2 * A^2 * u^2 n.b. A = 2 * (1 - d) / (1 + d) = 486662*/
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fe_add(x, x, y); /* x = w^2 - 2 * A^2 * u^2 */
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fe_divpowm1(r->X, w, x); /* r->X = (w / x)^(m + 1) */
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fe_sq(y, r->X); /* y = (w / x)^(2*(m + 1)) */
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fe_mul(x, y, x); /* x = (w / x)^(2*(m + 1)) * (w^2 - 2 * A^2 * u^2) */
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fe_sub(y, w, x); /* y = 2 * u^2 + 1 - (w / x)^(2*(m + 1)) * (w^2 - 2 * A^2 * u^2) */
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fe_copy(z, fe_ma); /* z = -A */
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if (fe_isnonzero(y)) {
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fe_add(y, w, x);
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if (fe_isnonzero(y)) {
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@ -3613,6 +3613,494 @@ void sc_mul(unsigned char* s, const unsigned char* a, const unsigned char* b)
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s[31] = s11 >> 17;
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}
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/* libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c */
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/*
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Input:
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a[0]+256*a[1]+...+256^31*a[31] = a
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b[0]+256*b[1]+...+256^31*b[31] = b
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c[0]+256*c[1]+...+256^31*c[31] = c
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*
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Output:
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s[0]+256*s[1]+...+256^31*s[31] = (ab+c) mod l
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where l = 2^252 + 27742317777372353535851937790883648493.
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*/
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void sc_muladd(unsigned char* s, const unsigned char* a,
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const unsigned char* b, const unsigned char* c)
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{
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int64_t a0 = 2097151 & load_3(a);
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int64_t a1 = 2097151 & (load_4(a + 2) >> 5);
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int64_t a2 = 2097151 & (load_3(a + 5) >> 2);
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int64_t a3 = 2097151 & (load_4(a + 7) >> 7);
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int64_t a4 = 2097151 & (load_4(a + 10) >> 4);
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int64_t a5 = 2097151 & (load_3(a + 13) >> 1);
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int64_t a6 = 2097151 & (load_4(a + 15) >> 6);
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int64_t a7 = 2097151 & (load_3(a + 18) >> 3);
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int64_t a8 = 2097151 & load_3(a + 21);
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int64_t a9 = 2097151 & (load_4(a + 23) >> 5);
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int64_t a10 = 2097151 & (load_3(a + 26) >> 2);
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int64_t a11 = (load_4(a + 28) >> 7);
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int64_t b0 = 2097151 & load_3(b);
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int64_t b1 = 2097151 & (load_4(b + 2) >> 5);
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int64_t b2 = 2097151 & (load_3(b + 5) >> 2);
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int64_t b3 = 2097151 & (load_4(b + 7) >> 7);
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int64_t b4 = 2097151 & (load_4(b + 10) >> 4);
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int64_t b5 = 2097151 & (load_3(b + 13) >> 1);
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int64_t b6 = 2097151 & (load_4(b + 15) >> 6);
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int64_t b7 = 2097151 & (load_3(b + 18) >> 3);
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int64_t b8 = 2097151 & load_3(b + 21);
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int64_t b9 = 2097151 & (load_4(b + 23) >> 5);
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int64_t b10 = 2097151 & (load_3(b + 26) >> 2);
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int64_t b11 = (load_4(b + 28) >> 7);
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int64_t c0 = 2097151 & load_3(c);
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int64_t c1 = 2097151 & (load_4(c + 2) >> 5);
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int64_t c2 = 2097151 & (load_3(c + 5) >> 2);
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int64_t c3 = 2097151 & (load_4(c + 7) >> 7);
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int64_t c4 = 2097151 & (load_4(c + 10) >> 4);
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int64_t c5 = 2097151 & (load_3(c + 13) >> 1);
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int64_t c6 = 2097151 & (load_4(c + 15) >> 6);
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int64_t c7 = 2097151 & (load_3(c + 18) >> 3);
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int64_t c8 = 2097151 & load_3(c + 21);
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int64_t c9 = 2097151 & (load_4(c + 23) >> 5);
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int64_t c10 = 2097151 & (load_3(c + 26) >> 2);
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int64_t c11 = (load_4(c + 28) >> 7);
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int64_t s0;
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int64_t s1;
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int64_t s2;
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int64_t s3;
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int64_t s4;
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int64_t s5;
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int64_t s6;
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int64_t s7;
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int64_t s8;
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int64_t s9;
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int64_t s10;
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int64_t s11;
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int64_t s12;
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int64_t s13;
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int64_t s14;
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int64_t s15;
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int64_t s16;
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int64_t s17;
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int64_t s18;
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int64_t s19;
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int64_t s20;
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int64_t s21;
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int64_t s22;
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int64_t s23;
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int64_t carry0;
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int64_t carry1;
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int64_t carry2;
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int64_t carry3;
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int64_t carry4;
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int64_t carry5;
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int64_t carry6;
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int64_t carry7;
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int64_t carry8;
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int64_t carry9;
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int64_t carry10;
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int64_t carry11;
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int64_t carry12;
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int64_t carry13;
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int64_t carry14;
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int64_t carry15;
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int64_t carry16;
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int64_t carry17;
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int64_t carry18;
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int64_t carry19;
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int64_t carry20;
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int64_t carry21;
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int64_t carry22;
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s0 = c0 + a0 * b0;
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s1 = c1 + a0 * b1 + a1 * b0;
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s2 = c2 + a0 * b2 + a1 * b1 + a2 * b0;
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s3 = c3 + a0 * b3 + a1 * b2 + a2 * b1 + a3 * b0;
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s4 = c4 + a0 * b4 + a1 * b3 + a2 * b2 + a3 * b1 + a4 * b0;
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s5 = c5 + a0 * b5 + a1 * b4 + a2 * b3 + a3 * b2 + a4 * b1 + a5 * b0;
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s6 = c6 + a0 * b6 + a1 * b5 + a2 * b4 + a3 * b3 + a4 * b2 + a5 * b1 +
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a6 * b0;
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s7 = c7 + a0 * b7 + a1 * b6 + a2 * b5 + a3 * b4 + a4 * b3 + a5 * b2 +
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a6 * b1 + a7 * b0;
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s8 = c8 + a0 * b8 + a1 * b7 + a2 * b6 + a3 * b5 + a4 * b4 + a5 * b3 +
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a6 * b2 + a7 * b1 + a8 * b0;
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s9 = c9 + a0 * b9 + a1 * b8 + a2 * b7 + a3 * b6 + a4 * b5 + a5 * b4 +
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a6 * b3 + a7 * b2 + a8 * b1 + a9 * b0;
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s10 = c10 + a0 * b10 + a1 * b9 + a2 * b8 + a3 * b7 + a4 * b6 + a5 * b5 +
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a6 * b4 + a7 * b3 + a8 * b2 + a9 * b1 + a10 * b0;
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s11 = c11 + a0 * b11 + a1 * b10 + a2 * b9 + a3 * b8 + a4 * b7 + a5 * b6 +
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a6 * b5 + a7 * b4 + a8 * b3 + a9 * b2 + a10 * b1 + a11 * b0;
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s12 = a1 * b11 + a2 * b10 + a3 * b9 + a4 * b8 + a5 * b7 + a6 * b6 +
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a7 * b5 + a8 * b4 + a9 * b3 + a10 * b2 + a11 * b1;
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s13 = a2 * b11 + a3 * b10 + a4 * b9 + a5 * b8 + a6 * b7 + a7 * b6 +
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a8 * b5 + a9 * b4 + a10 * b3 + a11 * b2;
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s14 = a3 * b11 + a4 * b10 + a5 * b9 + a6 * b8 + a7 * b7 + a8 * b6 +
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a9 * b5 + a10 * b4 + a11 * b3;
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s15 = a4 * b11 + a5 * b10 + a6 * b9 + a7 * b8 + a8 * b7 + a9 * b6 +
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a10 * b5 + a11 * b4;
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s16 =
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a5 * b11 + a6 * b10 + a7 * b9 + a8 * b8 + a9 * b7 + a10 * b6 + a11 * b5;
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s17 = a6 * b11 + a7 * b10 + a8 * b9 + a9 * b8 + a10 * b7 + a11 * b6;
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s18 = a7 * b11 + a8 * b10 + a9 * b9 + a10 * b8 + a11 * b7;
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s19 = a8 * b11 + a9 * b10 + a10 * b9 + a11 * b8;
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s20 = a9 * b11 + a10 * b10 + a11 * b9;
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s21 = a10 * b11 + a11 * b10;
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s22 = a11 * b11;
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s23 = 0;
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carry0 = (s0 + (int64_t)(1L << 20)) >> 21;
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s1 += carry0;
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s0 -= carry0 * ((uint64_t)1L << 21);
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carry2 = (s2 + (int64_t)(1L << 20)) >> 21;
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s3 += carry2;
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s2 -= carry2 * ((uint64_t)1L << 21);
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carry4 = (s4 + (int64_t)(1L << 20)) >> 21;
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s5 += carry4;
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s4 -= carry4 * ((uint64_t)1L << 21);
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carry6 = (s6 + (int64_t)(1L << 20)) >> 21;
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s7 += carry6;
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s6 -= carry6 * ((uint64_t)1L << 21);
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carry8 = (s8 + (int64_t)(1L << 20)) >> 21;
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s9 += carry8;
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s8 -= carry8 * ((uint64_t)1L << 21);
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carry10 = (s10 + (int64_t)(1L << 20)) >> 21;
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s11 += carry10;
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s10 -= carry10 * ((uint64_t)1L << 21);
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carry12 = (s12 + (int64_t)(1L << 20)) >> 21;
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s13 += carry12;
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s12 -= carry12 * ((uint64_t)1L << 21);
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carry14 = (s14 + (int64_t)(1L << 20)) >> 21;
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s15 += carry14;
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s14 -= carry14 * ((uint64_t)1L << 21);
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carry16 = (s16 + (int64_t)(1L << 20)) >> 21;
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s17 += carry16;
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s16 -= carry16 * ((uint64_t)1L << 21);
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carry18 = (s18 + (int64_t)(1L << 20)) >> 21;
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s19 += carry18;
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s18 -= carry18 * ((uint64_t)1L << 21);
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carry20 = (s20 + (int64_t)(1L << 20)) >> 21;
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s21 += carry20;
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s20 -= carry20 * ((uint64_t)1L << 21);
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carry22 = (s22 + (int64_t)(1L << 20)) >> 21;
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s23 += carry22;
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s22 -= carry22 * ((uint64_t)1L << 21);
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carry1 = (s1 + (int64_t)(1L << 20)) >> 21;
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s2 += carry1;
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s1 -= carry1 * ((uint64_t)1L << 21);
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carry3 = (s3 + (int64_t)(1L << 20)) >> 21;
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s4 += carry3;
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s3 -= carry3 * ((uint64_t)1L << 21);
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carry5 = (s5 + (int64_t)(1L << 20)) >> 21;
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s6 += carry5;
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s5 -= carry5 * ((uint64_t)1L << 21);
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carry7 = (s7 + (int64_t)(1L << 20)) >> 21;
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s8 += carry7;
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s7 -= carry7 * ((uint64_t)1L << 21);
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carry9 = (s9 + (int64_t)(1L << 20)) >> 21;
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s10 += carry9;
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s9 -= carry9 * ((uint64_t)1L << 21);
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carry11 = (s11 + (int64_t)(1L << 20)) >> 21;
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s12 += carry11;
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s11 -= carry11 * ((uint64_t)1L << 21);
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carry13 = (s13 + (int64_t)(1L << 20)) >> 21;
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s14 += carry13;
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s13 -= carry13 * ((uint64_t)1L << 21);
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carry15 = (s15 + (int64_t)(1L << 20)) >> 21;
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s16 += carry15;
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s15 -= carry15 * ((uint64_t)1L << 21);
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carry17 = (s17 + (int64_t)(1L << 20)) >> 21;
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s18 += carry17;
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s17 -= carry17 * ((uint64_t)1L << 21);
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carry19 = (s19 + (int64_t)(1L << 20)) >> 21;
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s20 += carry19;
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s19 -= carry19 * ((uint64_t)1L << 21);
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carry21 = (s21 + (int64_t)(1L << 20)) >> 21;
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s22 += carry21;
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s21 -= carry21 * ((uint64_t)1L << 21);
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s11 += s23 * 666643;
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s12 += s23 * 470296;
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s13 += s23 * 654183;
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s14 -= s23 * 997805;
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s15 += s23 * 136657;
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s16 -= s23 * 683901;
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s10 += s22 * 666643;
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s11 += s22 * 470296;
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s12 += s22 * 654183;
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s13 -= s22 * 997805;
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s14 += s22 * 136657;
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s15 -= s22 * 683901;
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s9 += s21 * 666643;
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s10 += s21 * 470296;
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s11 += s21 * 654183;
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s12 -= s21 * 997805;
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s13 += s21 * 136657;
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s14 -= s21 * 683901;
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s8 += s20 * 666643;
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s9 += s20 * 470296;
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s10 += s20 * 654183;
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s11 -= s20 * 997805;
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s12 += s20 * 136657;
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s13 -= s20 * 683901;
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s7 += s19 * 666643;
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s8 += s19 * 470296;
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s9 += s19 * 654183;
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s10 -= s19 * 997805;
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s11 += s19 * 136657;
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s12 -= s19 * 683901;
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s6 += s18 * 666643;
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s7 += s18 * 470296;
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s8 += s18 * 654183;
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s9 -= s18 * 997805;
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s10 += s18 * 136657;
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s11 -= s18 * 683901;
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carry6 = (s6 + (int64_t)(1L << 20)) >> 21;
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s7 += carry6;
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s6 -= carry6 * ((uint64_t)1L << 21);
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carry8 = (s8 + (int64_t)(1L << 20)) >> 21;
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s9 += carry8;
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s8 -= carry8 * ((uint64_t)1L << 21);
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carry10 = (s10 + (int64_t)(1L << 20)) >> 21;
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s11 += carry10;
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s10 -= carry10 * ((uint64_t)1L << 21);
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carry12 = (s12 + (int64_t)(1L << 20)) >> 21;
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s13 += carry12;
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s12 -= carry12 * ((uint64_t)1L << 21);
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carry14 = (s14 + (int64_t)(1L << 20)) >> 21;
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s15 += carry14;
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s14 -= carry14 * ((uint64_t)1L << 21);
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carry16 = (s16 + (int64_t)(1L << 20)) >> 21;
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s17 += carry16;
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s16 -= carry16 * ((uint64_t)1L << 21);
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carry7 = (s7 + (int64_t)(1L << 20)) >> 21;
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s8 += carry7;
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s7 -= carry7 * ((uint64_t)1L << 21);
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carry9 = (s9 + (int64_t)(1L << 20)) >> 21;
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s10 += carry9;
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s9 -= carry9 * ((uint64_t)1L << 21);
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carry11 = (s11 + (int64_t)(1L << 20)) >> 21;
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s12 += carry11;
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s11 -= carry11 * ((uint64_t)1L << 21);
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carry13 = (s13 + (int64_t)(1L << 20)) >> 21;
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s14 += carry13;
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s13 -= carry13 * ((uint64_t)1L << 21);
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carry15 = (s15 + (int64_t)(1L << 20)) >> 21;
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s16 += carry15;
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s15 -= carry15 * ((uint64_t)1L << 21);
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s5 += s17 * 666643;
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s6 += s17 * 470296;
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s7 += s17 * 654183;
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s8 -= s17 * 997805;
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s9 += s17 * 136657;
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s10 -= s17 * 683901;
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s4 += s16 * 666643;
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s5 += s16 * 470296;
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s6 += s16 * 654183;
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s7 -= s16 * 997805;
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s8 += s16 * 136657;
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s9 -= s16 * 683901;
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s3 += s15 * 666643;
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s4 += s15 * 470296;
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s5 += s15 * 654183;
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s6 -= s15 * 997805;
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s7 += s15 * 136657;
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s8 -= s15 * 683901;
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s2 += s14 * 666643;
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s3 += s14 * 470296;
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s4 += s14 * 654183;
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s5 -= s14 * 997805;
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s6 += s14 * 136657;
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s7 -= s14 * 683901;
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s1 += s13 * 666643;
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s2 += s13 * 470296;
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||||
s3 += s13 * 654183;
|
||||
s4 -= s13 * 997805;
|
||||
s5 += s13 * 136657;
|
||||
s6 -= s13 * 683901;
|
||||
|
||||
s0 += s12 * 666643;
|
||||
s1 += s12 * 470296;
|
||||
s2 += s12 * 654183;
|
||||
s3 -= s12 * 997805;
|
||||
s4 += s12 * 136657;
|
||||
s5 -= s12 * 683901;
|
||||
s12 = 0;
|
||||
|
||||
carry0 = (s0 + (int64_t)(1L << 20)) >> 21;
|
||||
s1 += carry0;
|
||||
s0 -= carry0 * ((uint64_t)1L << 21);
|
||||
carry2 = (s2 + (int64_t)(1L << 20)) >> 21;
|
||||
s3 += carry2;
|
||||
s2 -= carry2 * ((uint64_t)1L << 21);
|
||||
carry4 = (s4 + (int64_t)(1L << 20)) >> 21;
|
||||
s5 += carry4;
|
||||
s4 -= carry4 * ((uint64_t)1L << 21);
|
||||
carry6 = (s6 + (int64_t)(1L << 20)) >> 21;
|
||||
s7 += carry6;
|
||||
s6 -= carry6 * ((uint64_t)1L << 21);
|
||||
carry8 = (s8 + (int64_t)(1L << 20)) >> 21;
|
||||
s9 += carry8;
|
||||
s8 -= carry8 * ((uint64_t)1L << 21);
|
||||
carry10 = (s10 + (int64_t)(1L << 20)) >> 21;
|
||||
s11 += carry10;
|
||||
s10 -= carry10 * ((uint64_t)1L << 21);
|
||||
|
||||
carry1 = (s1 + (int64_t)(1L << 20)) >> 21;
|
||||
s2 += carry1;
|
||||
s1 -= carry1 * ((uint64_t)1L << 21);
|
||||
carry3 = (s3 + (int64_t)(1L << 20)) >> 21;
|
||||
s4 += carry3;
|
||||
s3 -= carry3 * ((uint64_t)1L << 21);
|
||||
carry5 = (s5 + (int64_t)(1L << 20)) >> 21;
|
||||
s6 += carry5;
|
||||
s5 -= carry5 * ((uint64_t)1L << 21);
|
||||
carry7 = (s7 + (int64_t)(1L << 20)) >> 21;
|
||||
s8 += carry7;
|
||||
s7 -= carry7 * ((uint64_t)1L << 21);
|
||||
carry9 = (s9 + (int64_t)(1L << 20)) >> 21;
|
||||
s10 += carry9;
|
||||
s9 -= carry9 * ((uint64_t)1L << 21);
|
||||
carry11 = (s11 + (int64_t)(1L << 20)) >> 21;
|
||||
s12 += carry11;
|
||||
s11 -= carry11 * ((uint64_t)1L << 21);
|
||||
|
||||
s0 += s12 * 666643;
|
||||
s1 += s12 * 470296;
|
||||
s2 += s12 * 654183;
|
||||
s3 -= s12 * 997805;
|
||||
s4 += s12 * 136657;
|
||||
s5 -= s12 * 683901;
|
||||
s12 = 0;
|
||||
|
||||
carry0 = s0 >> 21;
|
||||
s1 += carry0;
|
||||
s0 -= carry0 * ((uint64_t)1L << 21);
|
||||
carry1 = s1 >> 21;
|
||||
s2 += carry1;
|
||||
s1 -= carry1 * ((uint64_t)1L << 21);
|
||||
carry2 = s2 >> 21;
|
||||
s3 += carry2;
|
||||
s2 -= carry2 * ((uint64_t)1L << 21);
|
||||
carry3 = s3 >> 21;
|
||||
s4 += carry3;
|
||||
s3 -= carry3 * ((uint64_t)1L << 21);
|
||||
carry4 = s4 >> 21;
|
||||
s5 += carry4;
|
||||
s4 -= carry4 * ((uint64_t)1L << 21);
|
||||
carry5 = s5 >> 21;
|
||||
s6 += carry5;
|
||||
s5 -= carry5 * ((uint64_t)1L << 21);
|
||||
carry6 = s6 >> 21;
|
||||
s7 += carry6;
|
||||
s6 -= carry6 * ((uint64_t)1L << 21);
|
||||
carry7 = s7 >> 21;
|
||||
s8 += carry7;
|
||||
s7 -= carry7 * ((uint64_t)1L << 21);
|
||||
carry8 = s8 >> 21;
|
||||
s9 += carry8;
|
||||
s8 -= carry8 * ((uint64_t)1L << 21);
|
||||
carry9 = s9 >> 21;
|
||||
s10 += carry9;
|
||||
s9 -= carry9 * ((uint64_t)1L << 21);
|
||||
carry10 = s10 >> 21;
|
||||
s11 += carry10;
|
||||
s10 -= carry10 * ((uint64_t)1L << 21);
|
||||
carry11 = s11 >> 21;
|
||||
s12 += carry11;
|
||||
s11 -= carry11 * ((uint64_t)1L << 21);
|
||||
|
||||
s0 += s12 * 666643;
|
||||
s1 += s12 * 470296;
|
||||
s2 += s12 * 654183;
|
||||
s3 -= s12 * 997805;
|
||||
s4 += s12 * 136657;
|
||||
s5 -= s12 * 683901;
|
||||
|
||||
carry0 = s0 >> 21;
|
||||
s1 += carry0;
|
||||
s0 -= carry0 * ((uint64_t)1L << 21);
|
||||
carry1 = s1 >> 21;
|
||||
s2 += carry1;
|
||||
s1 -= carry1 * ((uint64_t)1L << 21);
|
||||
carry2 = s2 >> 21;
|
||||
s3 += carry2;
|
||||
s2 -= carry2 * ((uint64_t)1L << 21);
|
||||
carry3 = s3 >> 21;
|
||||
s4 += carry3;
|
||||
s3 -= carry3 * ((uint64_t)1L << 21);
|
||||
carry4 = s4 >> 21;
|
||||
s5 += carry4;
|
||||
s4 -= carry4 * ((uint64_t)1L << 21);
|
||||
carry5 = s5 >> 21;
|
||||
s6 += carry5;
|
||||
s5 -= carry5 * ((uint64_t)1L << 21);
|
||||
carry6 = s6 >> 21;
|
||||
s7 += carry6;
|
||||
s6 -= carry6 * ((uint64_t)1L << 21);
|
||||
carry7 = s7 >> 21;
|
||||
s8 += carry7;
|
||||
s7 -= carry7 * ((uint64_t)1L << 21);
|
||||
carry8 = s8 >> 21;
|
||||
s9 += carry8;
|
||||
s8 -= carry8 * ((uint64_t)1L << 21);
|
||||
carry9 = s9 >> 21;
|
||||
s10 += carry9;
|
||||
s9 -= carry9 * ((uint64_t)1L << 21);
|
||||
carry10 = s10 >> 21;
|
||||
s11 += carry10;
|
||||
s10 -= carry10 * ((uint64_t)1L << 21);
|
||||
|
||||
s[0] = s0 >> 0;
|
||||
s[1] = s0 >> 8;
|
||||
s[2] = (s0 >> 16) | (s1 * ((uint64_t)1 << 5));
|
||||
s[3] = s1 >> 3;
|
||||
s[4] = s1 >> 11;
|
||||
s[5] = (s1 >> 19) | (s2 * ((uint64_t)1 << 2));
|
||||
s[6] = s2 >> 6;
|
||||
s[7] = (s2 >> 14) | (s3 * ((uint64_t)1 << 7));
|
||||
s[8] = s3 >> 1;
|
||||
s[9] = s3 >> 9;
|
||||
s[10] = (s3 >> 17) | (s4 * ((uint64_t)1 << 4));
|
||||
s[11] = s4 >> 4;
|
||||
s[12] = s4 >> 12;
|
||||
s[13] = (s4 >> 20) | (s5 * ((uint64_t)1 << 1));
|
||||
s[14] = s5 >> 7;
|
||||
s[15] = (s5 >> 15) | (s6 * ((uint64_t)1 << 6));
|
||||
s[16] = s6 >> 2;
|
||||
s[17] = s6 >> 10;
|
||||
s[18] = (s6 >> 18) | (s7 * ((uint64_t)1 << 3));
|
||||
s[19] = s7 >> 5;
|
||||
s[20] = s7 >> 13;
|
||||
s[21] = s8 >> 0;
|
||||
s[22] = s8 >> 8;
|
||||
s[23] = (s8 >> 16) | (s9 * ((uint64_t)1 << 5));
|
||||
s[24] = s9 >> 3;
|
||||
s[25] = s9 >> 11;
|
||||
s[26] = (s9 >> 19) | (s10 * ((uint64_t)1 << 2));
|
||||
s[27] = s10 >> 6;
|
||||
s[28] = (s10 >> 14) | (s11 * ((uint64_t)1 << 7));
|
||||
s[29] = s11 >> 1;
|
||||
s[30] = s11 >> 9;
|
||||
s[31] = s11 >> 17;
|
||||
}
|
||||
|
||||
|
||||
// out = z ^ -1 (= z ^ (L - 2) according to Fermat little theorem)
|
||||
void sc_invert(unsigned char* out, const unsigned char* z)
|
||||
{
|
||||
|
|
@ -3852,6 +4340,24 @@ void ge_bytes_hash_to_ec(ge_p3 *res, const unsigned char *ge_bytes)
|
|||
ge_p1p1_to_p3(res, &point2);
|
||||
}
|
||||
|
||||
void ge_mul8_p3(ge_p3 *r, const ge_p3 *t)
|
||||
{
|
||||
ge_p1p1 p1;
|
||||
ge_p2 p2;
|
||||
|
||||
// TODO: consider removing the following copy, replace &p2 by (ge_p2*)t as it's ugly but possible
|
||||
ge_p3_to_p2(&p2, t); // copying
|
||||
|
||||
ge_p2_dbl(&p1, &p2); // 3 fe_sq, 1 fe_sq2, 5 fe_add/sub
|
||||
ge_p1p1_to_p2(&p2, &p1); // 3 fe_mul
|
||||
ge_p2_dbl(&p1, &p2); // 3 fe_sq, 1 fe_sq2, 5 fe_add/sub
|
||||
ge_p1p1_to_p2(&p2, &p1); // 3 fe_mul
|
||||
ge_p2_dbl(&p1, &p2); // 3 fe_sq, 1 fe_sq2, 5 fe_add/sub
|
||||
|
||||
ge_p1p1_to_p3(r, &p1); // 4 fe_mul
|
||||
}
|
||||
|
||||
|
||||
// returns the most non-zero index of r
|
||||
int slide_v2(signed char *r, const unsigned char *a)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -104,6 +104,7 @@ void ge_scalarmult(ge_p2 *, const unsigned char *, const ge_p3 *);
|
|||
void ge_scalarmult_p3(ge_p3 *, const unsigned char *, const ge_p3 *);
|
||||
void ge_double_scalarmult_precomp_vartime(ge_p2 *, const unsigned char *, const ge_p3 *, const unsigned char *, const ge_dsmp);
|
||||
void ge_mul8(ge_p1p1 *, const ge_p2 *);
|
||||
void ge_mul8_p3(ge_p3 *, const ge_p3 *);
|
||||
void ge_fromfe_frombytes_vartime(ge_p2 *, const unsigned char *);
|
||||
void ge_p2_to_p3(ge_p3 *r, const ge_p2 *t);
|
||||
void ge_bytes_hash_to_ec(ge_p3 *, const unsigned char *);
|
||||
|
|
@ -127,6 +128,7 @@ void sc_add(unsigned char *, const unsigned char *, const unsigned char *);
|
|||
void sc_sub(unsigned char *, const unsigned char *, const unsigned char *);
|
||||
void sc_mulsub(unsigned char *, const unsigned char *, const unsigned char *, const unsigned char *);
|
||||
void sc_mul(unsigned char *, const unsigned char *, const unsigned char *);
|
||||
void sc_muladd(unsigned char* s, const unsigned char* a, const unsigned char* b, const unsigned char* c);
|
||||
int sc_check(const unsigned char *);
|
||||
int sc_isnonzero(const unsigned char *); /* Doesn't normalize */
|
||||
void sc_invert(unsigned char*, const unsigned char*);
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue