wolfSSL/wolfssl
1
0
Fork 1
mirror of https://github.com/wolfSSL/wolfssl.git synced 2025-08-01 03:34:39 +02:00
Code Issues Packages Projects Releases Wiki Activity

Further optimization of the ECC signature size calculation.

Browse Source
This commit is contained in:
David Garske
2019-04-30 08:50:19 -07:00
parent 5bfc49f63f
commit 443fef6a6a
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
wolfcrypt/src/ecc.c
View File

@@ -7091,8 +7091,8 @@ int wc_ecc_sig_size_calc(int sz)
/* maximum possible signature header size is 7 bytes plus 2 bytes padding */ /* maximum possible signature header size is 7 bytes plus 2 bytes padding */
maxSigSz = (sz * 2) + SIG_HEADER_SZ + ECC_MAX_PAD_SZ; maxSigSz = (sz * 2) + SIG_HEADER_SZ + ECC_MAX_PAD_SZ;
/* if total length is less than or equal to 128 then subtract 1 */ /* if total length is less than 128 + SEQ(1)+LEN(1) then subtract 1 */
if (maxSigSz <= 128) { if (maxSigSz < (128 + 2)) {
maxSigSz -= 1; maxSigSz -= 1;
} }
@@ -7119,8 +7119,8 @@ int wc_ecc_sig_size(ecc_key* key)
/* MSB can be set, so add 2 */ /* MSB can be set, so add 2 */
maxSigSz += ECC_MAX_PAD_SZ; maxSigSz += ECC_MAX_PAD_SZ;
} }
/* if total length is less than or equal to 128 then subtract 1 */ /* if total length is less than 128 + SEQ(1)+LEN(1) then subtract 1 */
if (maxSigSz <= 128) { if (maxSigSz < (128 + 2)) {
maxSigSz -= 1; maxSigSz -= 1;
} }