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Merge pull request #915 from padelsbach/const-time-auth 

Replace WMEMCMP in CheckAuthKeysLine
pull/922/head
John Safranek 2026-04-15 09:20:46 -07:00 committed by GitHub
parent 9c8b4e8a2c 854a36248e
commit 543a6c2a2f
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1 changed files with 4 additions and 1 deletions
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apps/wolfsshd/auth.c
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@ -229,7 +229,10 @@ static int CheckAuthKeysLine(char* line, word32 lineSz, const byte* key,
}
}
if (ret == WSSHD_AUTH_SUCCESS) {
if (keyCandSz != keySz || WMEMCMP(key, keyCand, keySz) != 0) {
/* Constant-time compare to avoid leaking which prefix bytes of an
* authorized key match a candidate offered by a remote peer. */
if (keyCandSz != keySz ||
ConstantCompare(key, keyCand, keySz) != 0) {
ret = WSSHD_AUTH_FAILURE;
}
}