arno/trezor-firmware
1
0
Fork 0
mirror of https://github.com/trezor/trezor-firmware.git synced 2025-05-17 06:18:48 +00:00
Code Issues Releases Wiki Activity

Rewrite ecdsa_uncompress_pubkey() using ecdsa_read_pubkey()

Browse Source
This commit is contained in:
Alex Beregszaszi 2016-05-17 19:37:29 +01:00
parent aecf8671a1
commit 4e7da75c6e
1 changed files with 8 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
ecdsa.c
View File

@ -820,23 +820,17 @@ void ecdsa_get_public_key65(const ecdsa_curve *curve, const uint8_t *priv_key, u
int ecdsa_uncompress_pubkey(const ecdsa_curve *curve, const uint8_t *pub_key, uint8_t *uncompressed) int ecdsa_uncompress_pubkey(const ecdsa_curve *curve, const uint8_t *pub_key, uint8_t *uncompressed)
{ {
if (pub_key[0] == 2 || pub_key[0] == 3) { curve_point pub;
bignum256 x, y;
bn_read_be(pub_key + 1, &x); if (!ecdsa_read_pubkey(curve, pub_key, &pub)) {
// uncompress_coords will check for pub_key[0] & 1 return 0;
uncompress_coords(curve, pub_key[0], &x, &y);
uncompressed[0] = 4;
memcpy(uncompressed + 1, pub_key + 1, 32);
bn_write_be(&y, uncompressed + 33);
return 1;
} else if (pub_key[0] == 4) {
memcpy(uncompressed, pub_key, 65);
return 1;
} }
return 0; uncompressed[0] = 4;
bn_write_be(&pub.x, uncompressed + 1);
bn_write_be(&pub.y, uncompressed + 33);
return 1;
} }
void ecdsa_get_pubkeyhash(const uint8_t *pub_key, uint8_t *pubkeyhash) void ecdsa_get_pubkeyhash(const uint8_t *pub_key, uint8_t *pubkeyhash)