j3d1/bearssl
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Harmonized behaviour when point length is invalid.

Browse source
This commit is contained in:
Thomas Pornin 2020-04-24 15:18:58 +02:00
parent acc70b1be6
commit dda1f8a0c4
4 changed files with 33 additions and 34 deletions
Download patch file Download diff file Expand all files Collapse all files

22
src/ec/ec_p256_m15.c
View file

@ -2039,12 +2039,13 @@ api_mul(unsigned char *G, size_t Glen,
p256_jacobian P;
(void)curve;
if (Glen != 65) {
return 0;
}
r = p256_decode(&P, G, Glen);
p256_mul(&P, x, xlen);
if (Glen >= 65) {
p256_to_affine(&P);
p256_encode(G, &P);
}
p256_to_affine(&P);
p256_encode(G, &P);
return r;
}
@ -2059,16 +2060,6 @@ api_mulgen(unsigned char *R,
p256_to_affine(&P);
p256_encode(R, &P);
return 65;
/*
const unsigned char *G;
size_t Glen;
G = api_generator(curve, &Glen);
memcpy(R, G, Glen);
api_mul(R, Glen, x, xlen, curve);
return Glen;
*/
}
static uint32_t
@ -2081,6 +2072,9 @@ api_muladd(unsigned char *A, const unsigned char *B, size_t len,
int i;
(void)curve;
if (len != 65) {
return 0;
}
r = p256_decode(&P, A, len);
p256_mul(&P, x, xlen);
if (B == NULL) {