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Remove some unnecessary squeeze() calls

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As only the subtrahend in a sub() call needs to be squeezed, the squeeze
can be skipped in these cases.
This commit is contained in:
Matthias Schiffer 2015-10-03 18:57:41 +02:00
parent 320daa4838
commit 89f8a35c71
1 changed files with 3 additions and 3 deletions
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6
src/ec25519.c
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@ -546,9 +546,9 @@ void ecc_25519_double(ecc_25519_work_t *out, const ecc_25519_work_t *in) {
mult_int(D, 486664, A); mult_int(D, 486664, A);
add(t1, in->X, in->Y); add(t1, in->X, in->Y);
square(t2, t1); square(t2, t1);
sub(t3, t2, A); squeeze(t3); sub(t3, t2, A);
sub(E, t3, B); sub(E, t3, B);
add(G, D, B); squeeze(G); add(G, D, B);
sub(F, G, C); sub(F, G, C);
sub(H, D, B); sub(H, D, B);
mult(out->X, E, F); mult(out->X, E, F);
@ -568,7 +568,7 @@ void ecc_25519_add(ecc_25519_work_t *out, const ecc_25519_work_t *in1, const ecc
add(t1, in1->X, in1->Y); add(t1, in1->X, in1->Y);
add(t2, in2->X, in2->Y); add(t2, in2->X, in2->Y);
mult(t3, t1, t2); mult(t3, t1, t2);
sub(t4, t3, A); squeeze(t4); sub(t4, t3, A);
sub(E, t4, B); sub(E, t4, B);
sub(F, D, C); sub(F, D, C);
add(G, D, C); add(G, D, C);