Date: Thu, 9 Jan 2020 18:29:59 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r356561 - head/sys/opencrypto Message-ID: <202001091829.009ITx8l079750@repo.freebsd.org>
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Author: jhb Date: Thu Jan 9 18:29:59 2020 New Revision: 356561 URL: https://svnweb.freebsd.org/changeset/base/356561 Log: Add stricter checking on mac key lengths. Negative lengths are always invalid. The key length should also be zero for hash algorithms that do not accept a key. admbugs: 949 Reported by: Yuval Kanarenstein <yuvalk@ssd-disclosure.com> Reviewed by: cem MFC after: 1 week Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D23094 Modified: head/sys/opencrypto/cryptodev.c Modified: head/sys/opencrypto/cryptodev.c ============================================================================== --- head/sys/opencrypto/cryptodev.c Thu Jan 9 18:14:48 2020 (r356560) +++ head/sys/opencrypto/cryptodev.c Thu Jan 9 18:29:59 2020 (r356561) @@ -585,8 +585,8 @@ cryptof_ioctl( if (thash) { cria.cri_alg = thash->type; cria.cri_klen = sop->mackeylen * 8; - if (thash->keysize != 0 && - sop->mackeylen > thash->keysize) { + if (sop->mackeylen > thash->keysize || + sop->mackeylen < 0) { CRYPTDEB("invalid mac key length"); error = EINVAL; SDT_PROBE1(opencrypto, dev, ioctl, error,
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