From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ward Subject: [PATCH iproute2 3/7] ip/xfrm: Improve transform protocol-specific parameter checking Date: Mon, 25 Mar 2013 10:23:15 -0400 Message-ID: <1364221399-1024-3-git-send-email-david.ward@ll.mit.edu> References: <1364221399-1024-1-git-send-email-david.ward@ll.mit.edu> Mime-Version: 1.0 Content-Type: text/plain Cc: David Ward To: Return-path: Received: from MX2.LL.MIT.EDU ([129.55.12.46]:42070 "EHLO mx2.ll.mit.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758167Ab3CYOX3 (ORCPT ); Mon, 25 Mar 2013 10:23:29 -0400 Received: from LLE2K7-HUB01.mitll.ad.local (LLE2K7-HUB01.mitll.ad.local) by mx2.ll.mit.edu (unknown) with ESMTP id r2PEN2cu023593 for ; Mon, 25 Mar 2013 10:23:28 -0400 In-Reply-To: <1364221399-1024-1-git-send-email-david.ward@ll.mit.edu> Sender: netdev-owner@vger.kernel.org List-ID: Ensure that only algorithms and modes supported by the transform protocol are specified (so that errors are more obvious). Signed-off-by: David Ward --- ip/xfrm_state.c | 108 ++++++++++++++++++++++++++++++++++++++++-------------- 1 files changed, 80 insertions(+), 28 deletions(-) diff --git a/ip/xfrm_state.c b/ip/xfrm_state.c index 85d3e35..08a4980 100644 --- a/ip/xfrm_state.c +++ b/ip/xfrm_state.c @@ -486,52 +486,104 @@ static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv) } } - switch (req.xsinfo.mode) { - case XFRM_MODE_TRANSPORT: - case XFRM_MODE_TUNNEL: - if (!xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) { - fprintf(stderr, "\"mode\" is invalid with proto=%s\n", + if (xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) { + switch (req.xsinfo.mode) { + case XFRM_MODE_TRANSPORT: + case XFRM_MODE_TUNNEL: + break; + case XFRM_MODE_BEET: + if (req.xsinfo.id.proto == IPPROTO_ESP) + break; + default: + fprintf(stderr, "MODE value is invalid with XFRM-PROTO value \"%s\"\n", strxf_xfrmproto(req.xsinfo.id.proto)); exit(1); } - break; - case XFRM_MODE_ROUTEOPTIMIZATION: - case XFRM_MODE_IN_TRIGGER: - if (!xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) { - fprintf(stderr, "\"mode\" is invalid with proto=%s\n", + + switch (req.xsinfo.id.proto) { + case IPPROTO_ESP: + if (calgop) { + fprintf(stderr, "ALGO-TYPE value \"%s\" is invalid with XFRM-PROTO value \"%s\"\n", + strxf_algotype(XFRMA_ALG_COMP), + strxf_xfrmproto(req.xsinfo.id.proto)); + exit(1); + } + if (!ealgop && !aeadop) { + fprintf(stderr, "ALGO-TYPE value \"%s\" or \"%s\" is required with XFRM-PROTO value \"%s\"\n", + strxf_algotype(XFRMA_ALG_CRYPT), + strxf_algotype(XFRMA_ALG_AEAD), + strxf_xfrmproto(req.xsinfo.id.proto)); + exit(1); + } + break; + case IPPROTO_AH: + if (ealgop || aeadop || calgop) { + fprintf(stderr, "ALGO-TYPE values \"%s\", \"%s\", and \"%s\" are invalid with XFRM-PROTO value \"%s\"\n", + strxf_algotype(XFRMA_ALG_CRYPT), + strxf_algotype(XFRMA_ALG_AEAD), + strxf_algotype(XFRMA_ALG_COMP), + strxf_xfrmproto(req.xsinfo.id.proto)); + exit(1); + } + if (!aalgop) { + fprintf(stderr, "ALGO-TYPE value \"%s\" or \"%s\" is required with XFRM-PROTO value \"%s\"\n", + strxf_algotype(XFRMA_ALG_AUTH), + strxf_algotype(XFRMA_ALG_AUTH_TRUNC), + strxf_xfrmproto(req.xsinfo.id.proto)); + exit(1); + } + break; + case IPPROTO_COMP: + if (ealgop || aalgop || aeadop) { + fprintf(stderr, "ALGO-TYPE values \"%s\", \"%s\", \"%s\", and \"%s\" are invalid with XFRM-PROTO value \"%s\"\n", + strxf_algotype(XFRMA_ALG_CRYPT), + strxf_algotype(XFRMA_ALG_AUTH), + strxf_algotype(XFRMA_ALG_AUTH_TRUNC), + strxf_algotype(XFRMA_ALG_AEAD), + strxf_xfrmproto(req.xsinfo.id.proto)); + exit(1); + } + if (!calgop) { + fprintf(stderr, "ALGO-TYPE value \"%s\" is required with XFRM-PROTO value \"%s\"\n", + strxf_algotype(XFRMA_ALG_COMP), + strxf_xfrmproto(req.xsinfo.id.proto)); + exit(1); + } + break; + } + } else { + if (ealgop || aalgop || aeadop || calgop) { + fprintf(stderr, "ALGO is invalid with XFRM-PROTO value \"%s\"\n", strxf_xfrmproto(req.xsinfo.id.proto)); exit(1); } - break; - default: - break; } - if (aeadop || ealgop || aalgop || calgop) { - if (!xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) { - fprintf(stderr, "\"ALGO\" is invalid with proto=%s\n", + if (xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) { + switch (req.xsinfo.mode) { + case XFRM_MODE_ROUTEOPTIMIZATION: + case XFRM_MODE_IN_TRIGGER: + break; + case 0: + fprintf(stderr, "\"mode\" is required with XFRM-PROTO value \"%s\"\n", strxf_xfrmproto(req.xsinfo.id.proto)); exit(1); - } - } else { - if (xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) { - fprintf(stderr, "\"ALGO\" is required with proto=%s\n", + default: + fprintf(stderr, "MODE value is invalid with XFRM-PROTO value \"%s\"\n", strxf_xfrmproto(req.xsinfo.id.proto)); - exit (1); + exit(1); } - } - if (coap) { - if (!xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) { - fprintf(stderr, "\"coa\" is invalid with proto=%s\n", + if (!coap) { + fprintf(stderr, "\"coa\" is required with XFRM-PROTO value \"%s\"\n", strxf_xfrmproto(req.xsinfo.id.proto)); exit(1); } } else { - if (xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) { - fprintf(stderr, "\"coa\" is required with proto=%s\n", + if (coap) { + fprintf(stderr, "\"coa\" is invalid with XFRM-PROTO value \"%s\"\n", strxf_xfrmproto(req.xsinfo.id.proto)); - exit (1); + exit(1); } } -- 1.7.1