Take BoringSSL 9847cdd: Fix signed left-shifts in curve25519.c.
This commit is contained in:
Brian Smith
commit
cda8b2dea1
236
third_party/fiat/curve25519.c
vendored
236
third_party/fiat/curve25519.c
vendored
@ -960,6 +960,12 @@ static void ge_double_scalarmult_vartime(ge_p2 *r, const uint8_t *a,
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}
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}
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// int64_lshift21 returns |a << 21| but is defined when shifting bits into the
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// sign bit. This works around a language flaw in C.
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static inline int64_t int64_lshift21(int64_t a) {
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return (int64_t)((uint64_t)a << 21);
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}
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// The set of scalars is \Z/l
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// where l = 2^252 + 27742317777372353535851937790883648493.
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@ -1063,38 +1069,38 @@ void GFp_x25519_sc_reduce(uint8_t s[64]) {
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carry6 = (s6 + (1 << 20)) >> 21;
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s7 += carry6;
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s6 -= carry6 << 21;
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s6 -= int64_lshift21(carry6);
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carry8 = (s8 + (1 << 20)) >> 21;
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s9 += carry8;
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s8 -= carry8 << 21;
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s8 -= int64_lshift21(carry8);
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carry10 = (s10 + (1 << 20)) >> 21;
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s11 += carry10;
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s10 -= carry10 << 21;
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s10 -= int64_lshift21(carry10);
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carry12 = (s12 + (1 << 20)) >> 21;
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s13 += carry12;
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s12 -= carry12 << 21;
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s12 -= int64_lshift21(carry12);
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carry14 = (s14 + (1 << 20)) >> 21;
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s15 += carry14;
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s14 -= carry14 << 21;
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s14 -= int64_lshift21(carry14);
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carry16 = (s16 + (1 << 20)) >> 21;
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s17 += carry16;
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s16 -= carry16 << 21;
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s16 -= int64_lshift21(carry16);
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carry7 = (s7 + (1 << 20)) >> 21;
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s8 += carry7;
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s7 -= carry7 << 21;
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s7 -= int64_lshift21(carry7);
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carry9 = (s9 + (1 << 20)) >> 21;
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s10 += carry9;
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s9 -= carry9 << 21;
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s9 -= int64_lshift21(carry9);
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carry11 = (s11 + (1 << 20)) >> 21;
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s12 += carry11;
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s11 -= carry11 << 21;
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s11 -= int64_lshift21(carry11);
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carry13 = (s13 + (1 << 20)) >> 21;
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s14 += carry13;
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s13 -= carry13 << 21;
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s13 -= int64_lshift21(carry13);
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carry15 = (s15 + (1 << 20)) >> 21;
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s16 += carry15;
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s15 -= carry15 << 21;
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s15 -= int64_lshift21(carry15);
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s5 += s17 * 666643;
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s6 += s17 * 470296;
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@ -1146,41 +1152,41 @@ void GFp_x25519_sc_reduce(uint8_t s[64]) {
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carry0 = (s0 + (1 << 20)) >> 21;
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s1 += carry0;
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s0 -= carry0 << 21;
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s0 -= int64_lshift21(carry0);
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carry2 = (s2 + (1 << 20)) >> 21;
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s3 += carry2;
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s2 -= carry2 << 21;
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s2 -= int64_lshift21(carry2);
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carry4 = (s4 + (1 << 20)) >> 21;
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s5 += carry4;
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s4 -= carry4 << 21;
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s4 -= int64_lshift21(carry4);
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carry6 = (s6 + (1 << 20)) >> 21;
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s7 += carry6;
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s6 -= carry6 << 21;
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s6 -= int64_lshift21(carry6);
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carry8 = (s8 + (1 << 20)) >> 21;
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s9 += carry8;
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s8 -= carry8 << 21;
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s8 -= int64_lshift21(carry8);
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carry10 = (s10 + (1 << 20)) >> 21;
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s11 += carry10;
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s10 -= carry10 << 21;
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s10 -= int64_lshift21(carry10);
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carry1 = (s1 + (1 << 20)) >> 21;
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s2 += carry1;
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s1 -= carry1 << 21;
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s1 -= int64_lshift21(carry1);
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carry3 = (s3 + (1 << 20)) >> 21;
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s4 += carry3;
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s3 -= carry3 << 21;
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s3 -= int64_lshift21(carry3);
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carry5 = (s5 + (1 << 20)) >> 21;
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s6 += carry5;
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s5 -= carry5 << 21;
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s5 -= int64_lshift21(carry5);
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carry7 = (s7 + (1 << 20)) >> 21;
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s8 += carry7;
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s7 -= carry7 << 21;
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s7 -= int64_lshift21(carry7);
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carry9 = (s9 + (1 << 20)) >> 21;
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s10 += carry9;
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s9 -= carry9 << 21;
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s9 -= int64_lshift21(carry9);
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carry11 = (s11 + (1 << 20)) >> 21;
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s12 += carry11;
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s11 -= carry11 << 21;
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s11 -= int64_lshift21(carry11);
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s0 += s12 * 666643;
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s1 += s12 * 470296;
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@ -1192,40 +1198,40 @@ void GFp_x25519_sc_reduce(uint8_t s[64]) {
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carry0 = s0 >> 21;
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s1 += carry0;
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s0 -= carry0 << 21;
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s0 -= int64_lshift21(carry0);
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carry1 = s1 >> 21;
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s2 += carry1;
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s1 -= carry1 << 21;
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s1 -= int64_lshift21(carry1);
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carry2 = s2 >> 21;
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s3 += carry2;
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s2 -= carry2 << 21;
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s2 -= int64_lshift21(carry2);
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carry3 = s3 >> 21;
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s4 += carry3;
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s3 -= carry3 << 21;
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s3 -= int64_lshift21(carry3);
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carry4 = s4 >> 21;
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s5 += carry4;
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s4 -= carry4 << 21;
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s4 -= int64_lshift21(carry4);
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carry5 = s5 >> 21;
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s6 += carry5;
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s5 -= carry5 << 21;
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s5 -= int64_lshift21(carry5);
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carry6 = s6 >> 21;
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s7 += carry6;
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s6 -= carry6 << 21;
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s6 -= int64_lshift21(carry6);
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carry7 = s7 >> 21;
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s8 += carry7;
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s7 -= carry7 << 21;
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s7 -= int64_lshift21(carry7);
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carry8 = s8 >> 21;
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s9 += carry8;
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s8 -= carry8 << 21;
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s8 -= int64_lshift21(carry8);
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carry9 = s9 >> 21;
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s10 += carry9;
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s9 -= carry9 << 21;
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s9 -= int64_lshift21(carry9);
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carry10 = s10 >> 21;
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s11 += carry10;
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s10 -= carry10 << 21;
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s10 -= int64_lshift21(carry10);
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carry11 = s11 >> 21;
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s12 += carry11;
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s11 -= carry11 << 21;
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s11 -= int64_lshift21(carry11);
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s0 += s12 * 666643;
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s1 += s12 * 470296;
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@ -1237,37 +1243,37 @@ void GFp_x25519_sc_reduce(uint8_t s[64]) {
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carry0 = s0 >> 21;
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s1 += carry0;
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s0 -= carry0 << 21;
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s0 -= int64_lshift21(carry0);
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carry1 = s1 >> 21;
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s2 += carry1;
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s1 -= carry1 << 21;
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s1 -= int64_lshift21(carry1);
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carry2 = s2 >> 21;
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s3 += carry2;
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s2 -= carry2 << 21;
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s2 -= int64_lshift21(carry2);
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carry3 = s3 >> 21;
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s4 += carry3;
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s3 -= carry3 << 21;
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s3 -= int64_lshift21(carry3);
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carry4 = s4 >> 21;
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s5 += carry4;
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s4 -= carry4 << 21;
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s4 -= int64_lshift21(carry4);
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carry5 = s5 >> 21;
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s6 += carry5;
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s5 -= carry5 << 21;
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s5 -= int64_lshift21(carry5);
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carry6 = s6 >> 21;
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s7 += carry6;
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s6 -= carry6 << 21;
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s6 -= int64_lshift21(carry6);
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carry7 = s7 >> 21;
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s8 += carry7;
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s7 -= carry7 << 21;
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s7 -= int64_lshift21(carry7);
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carry8 = s8 >> 21;
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s9 += carry8;
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s8 -= carry8 << 21;
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s8 -= int64_lshift21(carry8);
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carry9 = s9 >> 21;
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s10 += carry9;
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s9 -= carry9 << 21;
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s9 -= int64_lshift21(carry9);
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carry10 = s10 >> 21;
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s11 += carry10;
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s10 -= carry10 << 21;
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s10 -= int64_lshift21(carry10);
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s[0] = s0 >> 0;
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s[1] = s0 >> 8;
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@ -1433,74 +1439,74 @@ static void sc_muladd(uint8_t *s, const uint8_t *a, const uint8_t *b,
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carry0 = (s0 + (1 << 20)) >> 21;
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s1 += carry0;
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s0 -= carry0 << 21;
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s0 -= int64_lshift21(carry0);
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carry2 = (s2 + (1 << 20)) >> 21;
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s3 += carry2;
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s2 -= carry2 << 21;
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s2 -= int64_lshift21(carry2);
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carry4 = (s4 + (1 << 20)) >> 21;
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s5 += carry4;
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s4 -= carry4 << 21;
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s4 -= int64_lshift21(carry4);
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carry6 = (s6 + (1 << 20)) >> 21;
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s7 += carry6;
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s6 -= carry6 << 21;
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s6 -= int64_lshift21(carry6);
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carry8 = (s8 + (1 << 20)) >> 21;
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s9 += carry8;
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s8 -= carry8 << 21;
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s8 -= int64_lshift21(carry8);
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carry10 = (s10 + (1 << 20)) >> 21;
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s11 += carry10;
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s10 -= carry10 << 21;
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s10 -= int64_lshift21(carry10);
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carry12 = (s12 + (1 << 20)) >> 21;
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s13 += carry12;
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s12 -= carry12 << 21;
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s12 -= int64_lshift21(carry12);
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carry14 = (s14 + (1 << 20)) >> 21;
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s15 += carry14;
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s14 -= carry14 << 21;
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s14 -= int64_lshift21(carry14);
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carry16 = (s16 + (1 << 20)) >> 21;
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s17 += carry16;
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s16 -= carry16 << 21;
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s16 -= int64_lshift21(carry16);
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carry18 = (s18 + (1 << 20)) >> 21;
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s19 += carry18;
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s18 -= carry18 << 21;
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s18 -= int64_lshift21(carry18);
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carry20 = (s20 + (1 << 20)) >> 21;
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s21 += carry20;
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s20 -= carry20 << 21;
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s20 -= int64_lshift21(carry20);
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carry22 = (s22 + (1 << 20)) >> 21;
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s23 += carry22;
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s22 -= carry22 << 21;
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s22 -= int64_lshift21(carry22);
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carry1 = (s1 + (1 << 20)) >> 21;
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s2 += carry1;
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s1 -= carry1 << 21;
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s1 -= int64_lshift21(carry1);
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carry3 = (s3 + (1 << 20)) >> 21;
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s4 += carry3;
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s3 -= carry3 << 21;
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s3 -= int64_lshift21(carry3);
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carry5 = (s5 + (1 << 20)) >> 21;
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s6 += carry5;
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s5 -= carry5 << 21;
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s5 -= int64_lshift21(carry5);
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carry7 = (s7 + (1 << 20)) >> 21;
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s8 += carry7;
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s7 -= carry7 << 21;
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s7 -= int64_lshift21(carry7);
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carry9 = (s9 + (1 << 20)) >> 21;
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s10 += carry9;
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s9 -= carry9 << 21;
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s9 -= int64_lshift21(carry9);
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carry11 = (s11 + (1 << 20)) >> 21;
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s12 += carry11;
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s11 -= carry11 << 21;
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s11 -= int64_lshift21(carry11);
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carry13 = (s13 + (1 << 20)) >> 21;
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s14 += carry13;
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s13 -= carry13 << 21;
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s13 -= int64_lshift21(carry13);
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carry15 = (s15 + (1 << 20)) >> 21;
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s16 += carry15;
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s15 -= carry15 << 21;
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s15 -= int64_lshift21(carry15);
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carry17 = (s17 + (1 << 20)) >> 21;
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s18 += carry17;
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s17 -= carry17 << 21;
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s17 -= int64_lshift21(carry17);
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carry19 = (s19 + (1 << 20)) >> 21;
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s20 += carry19;
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s19 -= carry19 << 21;
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s19 -= int64_lshift21(carry19);
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carry21 = (s21 + (1 << 20)) >> 21;
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s22 += carry21;
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s21 -= carry21 << 21;
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s21 -= int64_lshift21(carry21);
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s11 += s23 * 666643;
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s12 += s23 * 470296;
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@ -1552,38 +1558,38 @@ static void sc_muladd(uint8_t *s, const uint8_t *a, const uint8_t *b,
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carry6 = (s6 + (1 << 20)) >> 21;
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s7 += carry6;
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s6 -= carry6 << 21;
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s6 -= int64_lshift21(carry6);
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carry8 = (s8 + (1 << 20)) >> 21;
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s9 += carry8;
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s8 -= carry8 << 21;
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s8 -= int64_lshift21(carry8);
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carry10 = (s10 + (1 << 20)) >> 21;
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s11 += carry10;
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s10 -= carry10 << 21;
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s10 -= int64_lshift21(carry10);
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carry12 = (s12 + (1 << 20)) >> 21;
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s13 += carry12;
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s12 -= carry12 << 21;
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s12 -= int64_lshift21(carry12);
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carry14 = (s14 + (1 << 20)) >> 21;
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s15 += carry14;
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s14 -= carry14 << 21;
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s14 -= int64_lshift21(carry14);
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carry16 = (s16 + (1 << 20)) >> 21;
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s17 += carry16;
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s16 -= carry16 << 21;
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s16 -= int64_lshift21(carry16);
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carry7 = (s7 + (1 << 20)) >> 21;
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s8 += carry7;
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s7 -= carry7 << 21;
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s7 -= int64_lshift21(carry7);
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carry9 = (s9 + (1 << 20)) >> 21;
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s10 += carry9;
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s9 -= carry9 << 21;
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s9 -= int64_lshift21(carry9);
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carry11 = (s11 + (1 << 20)) >> 21;
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s12 += carry11;
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s11 -= carry11 << 21;
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s11 -= int64_lshift21(carry11);
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carry13 = (s13 + (1 << 20)) >> 21;
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s14 += carry13;
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s13 -= carry13 << 21;
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s13 -= int64_lshift21(carry13);
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carry15 = (s15 + (1 << 20)) >> 21;
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s16 += carry15;
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s15 -= carry15 << 21;
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s15 -= int64_lshift21(carry15);
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s5 += s17 * 666643;
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s6 += s17 * 470296;
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@ -1635,41 +1641,41 @@ static void sc_muladd(uint8_t *s, const uint8_t *a, const uint8_t *b,
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carry0 = (s0 + (1 << 20)) >> 21;
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s1 += carry0;
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s0 -= carry0 << 21;
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s0 -= int64_lshift21(carry0);
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carry2 = (s2 + (1 << 20)) >> 21;
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s3 += carry2;
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s2 -= carry2 << 21;
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s2 -= int64_lshift21(carry2);
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carry4 = (s4 + (1 << 20)) >> 21;
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s5 += carry4;
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s4 -= carry4 << 21;
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s4 -= int64_lshift21(carry4);
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carry6 = (s6 + (1 << 20)) >> 21;
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s7 += carry6;
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s6 -= carry6 << 21;
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s6 -= int64_lshift21(carry6);
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carry8 = (s8 + (1 << 20)) >> 21;
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s9 += carry8;
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s8 -= carry8 << 21;
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s8 -= int64_lshift21(carry8);
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carry10 = (s10 + (1 << 20)) >> 21;
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s11 += carry10;
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s10 -= carry10 << 21;
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s10 -= int64_lshift21(carry10);
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carry1 = (s1 + (1 << 20)) >> 21;
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s2 += carry1;
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s1 -= carry1 << 21;
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s1 -= int64_lshift21(carry1);
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carry3 = (s3 + (1 << 20)) >> 21;
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s4 += carry3;
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s3 -= carry3 << 21;
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s3 -= int64_lshift21(carry3);
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carry5 = (s5 + (1 << 20)) >> 21;
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s6 += carry5;
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s5 -= carry5 << 21;
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s5 -= int64_lshift21(carry5);
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carry7 = (s7 + (1 << 20)) >> 21;
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s8 += carry7;
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s7 -= carry7 << 21;
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s7 -= int64_lshift21(carry7);
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carry9 = (s9 + (1 << 20)) >> 21;
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s10 += carry9;
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s9 -= carry9 << 21;
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s9 -= int64_lshift21(carry9);
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carry11 = (s11 + (1 << 20)) >> 21;
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s12 += carry11;
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s11 -= carry11 << 21;
|
||||
s11 -= int64_lshift21(carry11);
|
||||
|
||||
s0 += s12 * 666643;
|
||||
s1 += s12 * 470296;
|
||||
@ -1681,40 +1687,40 @@ static void sc_muladd(uint8_t *s, const uint8_t *a, const uint8_t *b,
|
||||
|
||||
carry0 = s0 >> 21;
|
||||
s1 += carry0;
|
||||
s0 -= carry0 << 21;
|
||||
s0 -= int64_lshift21(carry0);
|
||||
carry1 = s1 >> 21;
|
||||
s2 += carry1;
|
||||
s1 -= carry1 << 21;
|
||||
s1 -= int64_lshift21(carry1);
|
||||
carry2 = s2 >> 21;
|
||||
s3 += carry2;
|
||||
s2 -= carry2 << 21;
|
||||
s2 -= int64_lshift21(carry2);
|
||||
carry3 = s3 >> 21;
|
||||
s4 += carry3;
|
||||
s3 -= carry3 << 21;
|
||||
s3 -= int64_lshift21(carry3);
|
||||
carry4 = s4 >> 21;
|
||||
s5 += carry4;
|
||||
s4 -= carry4 << 21;
|
||||
s4 -= int64_lshift21(carry4);
|
||||
carry5 = s5 >> 21;
|
||||
s6 += carry5;
|
||||
s5 -= carry5 << 21;
|
||||
s5 -= int64_lshift21(carry5);
|
||||
carry6 = s6 >> 21;
|
||||
s7 += carry6;
|
||||
s6 -= carry6 << 21;
|
||||
s6 -= int64_lshift21(carry6);
|
||||
carry7 = s7 >> 21;
|
||||
s8 += carry7;
|
||||
s7 -= carry7 << 21;
|
||||
s7 -= int64_lshift21(carry7);
|
||||
carry8 = s8 >> 21;
|
||||
s9 += carry8;
|
||||
s8 -= carry8 << 21;
|
||||
s8 -= int64_lshift21(carry8);
|
||||
carry9 = s9 >> 21;
|
||||
s10 += carry9;
|
||||
s9 -= carry9 << 21;
|
||||
s9 -= int64_lshift21(carry9);
|
||||
carry10 = s10 >> 21;
|
||||
s11 += carry10;
|
||||
s10 -= carry10 << 21;
|
||||
s10 -= int64_lshift21(carry10);
|
||||
carry11 = s11 >> 21;
|
||||
s12 += carry11;
|
||||
s11 -= carry11 << 21;
|
||||
s11 -= int64_lshift21(carry11);
|
||||
|
||||
s0 += s12 * 666643;
|
||||
s1 += s12 * 470296;
|
||||
@ -1726,37 +1732,37 @@ static void sc_muladd(uint8_t *s, const uint8_t *a, const uint8_t *b,
|
||||
|
||||
carry0 = s0 >> 21;
|
||||
s1 += carry0;
|
||||
s0 -= carry0 << 21;
|
||||
s0 -= int64_lshift21(carry0);
|
||||
carry1 = s1 >> 21;
|
||||
s2 += carry1;
|
||||
s1 -= carry1 << 21;
|
||||
s1 -= int64_lshift21(carry1);
|
||||
carry2 = s2 >> 21;
|
||||
s3 += carry2;
|
||||
s2 -= carry2 << 21;
|
||||
s2 -= int64_lshift21(carry2);
|
||||
carry3 = s3 >> 21;
|
||||
s4 += carry3;
|
||||
s3 -= carry3 << 21;
|
||||
s3 -= int64_lshift21(carry3);
|
||||
carry4 = s4 >> 21;
|
||||
s5 += carry4;
|
||||
s4 -= carry4 << 21;
|
||||
s4 -= int64_lshift21(carry4);
|
||||
carry5 = s5 >> 21;
|
||||
s6 += carry5;
|
||||
s5 -= carry5 << 21;
|
||||
s5 -= int64_lshift21(carry5);
|
||||
carry6 = s6 >> 21;
|
||||
s7 += carry6;
|
||||
s6 -= carry6 << 21;
|
||||
s6 -= int64_lshift21(carry6);
|
||||
carry7 = s7 >> 21;
|
||||
s8 += carry7;
|
||||
s7 -= carry7 << 21;
|
||||
s7 -= int64_lshift21(carry7);
|
||||
carry8 = s8 >> 21;
|
||||
s9 += carry8;
|
||||
s8 -= carry8 << 21;
|
||||
s8 -= int64_lshift21(carry8);
|
||||
carry9 = s9 >> 21;
|
||||
s10 += carry9;
|
||||
s9 -= carry9 << 21;
|
||||
s9 -= int64_lshift21(carry9);
|
||||
carry10 = s10 >> 21;
|
||||
s11 += carry10;
|
||||
s10 -= carry10 << 21;
|
||||
s10 -= int64_lshift21(carry10);
|
||||
|
||||
s[0] = s0 >> 0;
|
||||
s[1] = s0 >> 8;
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user