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Remove unnecessary brackets

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This commit is contained in:
Frank Denis 2019-03-26 13:45:28 +01:00
parent 01ed4737af
commit b347bcfa89
1 changed files with 22 additions and 21 deletions
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43
src/libsodium/crypto_onetimeauth/poly1305/donna/poly1305_donna64.h
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@ -41,7 +41,7 @@ poly1305_init(poly1305_state_internal_t *st, const unsigned char key[32])
t1 = LOAD64_LE(&key[8]);
/* wiped after finalization */
st->r[0] = (t0) &0xffc0fffffff;
st->r[0] = (t0) & 0xffc0fffffff;
st->r[1] = ((t0 >> 44) | (t1 << 20)) & 0xfffffc0ffff;
st->r[2] = ((t1 >> 24)) & 0x00ffffffc0f;
@ -88,8 +88,8 @@ poly1305_blocks(poly1305_state_internal_t *st, const unsigned char *m,
t0 = LOAD64_LE(&m[0]);
t1 = LOAD64_LE(&m[8]);
h0 += ((t0) &0xfffffffffff);
h1 += (((t0 >> 44) | (t1 << 20)) & 0xfffffffffff);
h0 += t0 & 0xfffffffffff;
h1 += ((t0 >> 44) | (t1 << 20)) & 0xfffffffffff;
h2 += (((t1 >> 24)) & 0x3ffffffffff) | hibit;
/* h *= r */
@ -138,6 +138,7 @@ poly1305_finish(poly1305_state_internal_t *st, unsigned char mac[16])
unsigned long long h0, h1, h2, c;
unsigned long long g0, g1, g2;
unsigned long long t0, t1;
unsigned long long mask;
/* process the remaining block */
if (st->leftover) {
@ -157,43 +158,43 @@ poly1305_finish(poly1305_state_internal_t *st, unsigned char mac[16])
h1 = st->h[1];
h2 = st->h[2];
c = (h1 >> 44);
c = h1 >> 44;
h1 &= 0xfffffffffff;
h2 += c;
c = (h2 >> 42);
c = h2 >> 42;
h2 &= 0x3ffffffffff;
h0 += c * 5;
c = (h0 >> 44);
c = h0 >> 44;
h0 &= 0xfffffffffff;
h1 += c;
c = (h1 >> 44);
c = h1 >> 44;
h1 &= 0xfffffffffff;
h2 += c;
c = (h2 >> 42);
c = h2 >> 42;
h2 &= 0x3ffffffffff;
h0 += c * 5;
c = (h0 >> 44);
c = h0 >> 44;
h0 &= 0xfffffffffff;
h1 += c;
/* compute h + -p */
g0 = h0 + 5;
c = (g0 >> 44);
c = g0 >> 44;
g0 &= 0xfffffffffff;
g1 = h1 + c;
c = (g1 >> 44);
c = g1 >> 44;
g1 &= 0xfffffffffff;
g2 = h2 + c - (1ULL << 42);
/* select h if h < p, or h + -p if h >= p */
c = (g2 >> ((sizeof(unsigned long long) * 8) - 1)) - 1;
g0 &= c;
g1 &= c;
g2 &= c;
c = ~c;
h0 = (h0 & c) | g0;
h1 = (h1 & c) | g1;
h2 = (h2 & c) | g2;
mask = (g2 >> ((sizeof(unsigned long long) * 8) - 1)) - 1;
g0 &= mask;
g1 &= mask;
g2 &= mask;
mask = ~mask;
h0 = (h0 & mask) | g0;
h1 = (h1 & mask) | g1;
h2 = (h2 & mask) | g2;
/* h = (h + pad) */
t0 = st->pad[0];
@ -209,8 +210,8 @@ poly1305_finish(poly1305_state_internal_t *st, unsigned char mac[16])
h2 &= 0x3ffffffffff;
/* mac = h % (2^128) */
h0 = ((h0) | (h1 << 44));
h1 = ((h1 >> 20) | (h2 << 24));
h0 = (h0) | (h1 << 44);
h1 = (h1 >> 20) | (h2 << 24);
STORE64_LE(&mac[0], h0);
STORE64_LE(&mac[8], h1);