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Further optimization of the ECC signature size calculation.

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