From patchwork Tue Dec 15 05:42:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arne Schwabe X-Patchwork-Id: 1549 Return-Path: Delivered-To: patchwork@openvpn.net Delivered-To: patchwork@openvpn.net Received: from director7.mail.ord1d.rsapps.net ([172.27.255.1]) by backend30.mail.ord1d.rsapps.net with LMTP id 4JwRCMTn2F9tKAAAIUCqbw (envelope-from ) for ; Tue, 15 Dec 2020 11:43:48 -0500 Received: from proxy1.mail.iad3a.rsapps.net ([172.27.255.1]) by director7.mail.ord1d.rsapps.net with LMTP id QE3yB8Tn2F+/OgAAovjBpQ (envelope-from ) for ; Tue, 15 Dec 2020 11:43:48 -0500 Received: from smtp35.gate.iad3a ([172.27.255.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) by proxy1.mail.iad3a.rsapps.net with LMTPS id +J5VO8Pn2F/XMwAA8TVjwQ (envelope-from ) for ; Tue, 15 Dec 2020 11:43:47 -0500 X-Spam-Threshold: 95 X-Spam-Score: 0 X-Spam-Flag: NO X-Virus-Scanned: OK X-Orig-To: openvpnslackdevel@openvpn.net X-Originating-Ip: [216.105.38.7] Authentication-Results: smtp35.gate.iad3a.rsapps.net; iprev=pass policy.iprev="216.105.38.7"; spf=pass smtp.mailfrom="openvpn-devel-bounces@lists.sourceforge.net" smtp.helo="lists.sourceforge.net"; dkim=fail (signature verification failed) header.d=sourceforge.net; dkim=fail (signature verification failed) header.d=sf.net; dmarc=none (p=nil; dis=none) header.from=rfc2549.org X-Suspicious-Flag: YES X-Classification-ID: b36c452a-3ef4-11eb-a6cb-52540083445f-1-1 Received: from [216.105.38.7] ([216.105.38.7:57344] helo=lists.sourceforge.net) by smtp35.gate.iad3a.rsapps.net (envelope-from ) (ecelerity 4.2.38.62370 r(:)) with ESMTPS (cipher=DHE-RSA-AES256-GCM-SHA384) id B5/38-11582-3C7E8DF5; Tue, 15 Dec 2020 11:43:47 -0500 Received: from [127.0.0.1] (helo=sfs-ml-1.v29.lw.sourceforge.com) by sfs-ml-1.v29.lw.sourceforge.com with esmtp (Exim 4.90_1) (envelope-from ) id 1kpDPb-0007AV-KU; Tue, 15 Dec 2020 16:42:55 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-1.v29.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kpDPP-00076x-1Z for openvpn-devel@lists.sourceforge.net; Tue, 15 Dec 2020 16:42:43 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc: MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=bgF2akC7OfOVYzF2T23Cpcr+7flNBWtJEk5RiQRkTls=; b=dhNLTUhhSH+VlDgsHxWYoDlvvz 2+iYgoNLKjwJt56CQq4cCUaMVwszC8SSaylq9WW4uivi2mZrAE1jf8Qmg2CS+vxou2t/4jXrQp94a y4enWO+8SNNBeUbiKDiIr+4VttTJolHoH8dHT1CHBfPyHfPo0f4nz28nbyb+o09YtUe8=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc:MIME-Version: Content-Type:Content-Transfer-Encoding:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=bgF2akC7OfOVYzF2T23Cpcr+7flNBWtJEk5RiQRkTls=; b=bHx3/aGcmk171AUiP+3bDkvXpY QTi2nv472KDPy46bZw63KzyISXuA7DiPgO/dGjFW6wf7BeHSKLz6q3jNTJiE0qophDPf9wgTzipN7 VjXSnrbH8oKOjhd5IhYpljrVcC1oJw1Dza+axqH45vPJ61+Co1Thw4rX7H8eBTPBJfW8=; Received: from mail.blinkt.de ([192.26.174.232]) by sfi-mx-1.v28.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92.2) id 1kpDPI-00EU1F-I3 for openvpn-devel@lists.sourceforge.net; Tue, 15 Dec 2020 16:42:43 +0000 Received: from kamera.blinkt.de ([2001:638:502:390:20c:29ff:fec8:535c]) by mail.blinkt.de with smtp (Exim 4.94 (FreeBSD)) (envelope-from ) id 1kpDP4-0000Uc-2P for openvpn-devel@lists.sourceforge.net; Tue, 15 Dec 2020 17:42:22 +0100 Received: (nullmailer pid 6040 invoked by uid 10006); Tue, 15 Dec 2020 16:42:21 -0000 From: Arne Schwabe To: openvpn-devel@lists.sourceforge.net Date: Tue, 15 Dec 2020 17:42:20 +0100 Message-Id: <20201215164221.5995-1-arne@rfc2549.org> X-Mailer: git-send-email 2.17.1 X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: rfc2549.org] 0.2 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level mail domains are different 0.0 SPF_NONE SPF: sender does not publish an SPF Record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-Headers-End: 1kpDPI-00EU1F-I3 Subject: [Openvpn-devel] [PATCH 1/2] Move context_auth from context_2 to tls_multi X-BeenThere: openvpn-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: openvpn-devel-bounces@lists.sourceforge.net X-getmail-retrieved-from-mailbox: Inbox Some code currently is doing weird workarounds to figure out that side as side effect from other variables in tls_multi. Signed-off-by: Arne Schwabe --- src/openvpn/forward.c | 4 ++-- src/openvpn/multi.c | 24 ++++++++++++------------ src/openvpn/openvpn.h | 14 -------------- src/openvpn/push.c | 6 +++--- src/openvpn/ssl_common.h | 14 ++++++++++++++ 5 files changed, 31 insertions(+), 31 deletions(-) diff --git a/src/openvpn/forward.c b/src/openvpn/forward.c index 67615a6b..3807536e 100644 --- a/src/openvpn/forward.c +++ b/src/openvpn/forward.c @@ -535,7 +535,7 @@ encrypt_sign(struct context *c, bool comp_frag) * Drop non-TLS outgoing packet if client-connect script/plugin * has not yet succeeded. */ - if (c->c2.context_auth != CAS_SUCCEEDED) + if (c->c2.tls_multi->context_auth != CAS_SUCCEEDED) { c->c2.buf.len = 0; } @@ -980,7 +980,7 @@ process_incoming_link_part1(struct context *c, struct link_socket_info *lsi, boo * Drop non-TLS packet if client-connect script/plugin and cipher selection * has not yet succeeded. */ - if (c->c2.context_auth != CAS_SUCCEEDED) + if (c->c2.tls_multi && c->c2.tls_multi->context_auth != CAS_SUCCEEDED) { c->c2.buf.len = 0; } diff --git a/src/openvpn/multi.c b/src/openvpn/multi.c index dd713049..821c750a 100644 --- a/src/openvpn/multi.c +++ b/src/openvpn/multi.c @@ -675,7 +675,7 @@ multi_close_instance(struct multi_context *m, #ifdef ENABLE_MANAGEMENT set_cc_config(mi, NULL); #endif - if (mi->context.c2.context_auth == CAS_SUCCEEDED) + if (mi->context.c2.tls_multi->context_auth == CAS_SUCCEEDED) { multi_client_disconnect_script(mi); } @@ -785,7 +785,7 @@ multi_create_instance(struct multi_context *m, const struct mroute_addr *real) goto err; } - mi->context.c2.context_auth = CAS_PENDING; + mi->context.c2.tls_multi->context_auth = CAS_PENDING; if (hash_n_elements(m->hash) >= m->max_clients) { @@ -2437,18 +2437,18 @@ multi_client_connect_late_setup(struct multi_context *m, mi->reporting_addr_ipv6 = mi->context.c2.push_ifconfig_ipv6_local; /* set context-level authentication flag */ - mi->context.c2.context_auth = CAS_SUCCEEDED; + mi->context.c2.tls_multi->context_auth = CAS_SUCCEEDED; /* authentication complete, calculate dynamic client specific options */ if (!multi_client_set_protocol_options(&mi->context)) { - mi->context.c2.context_auth = CAS_FAILED; + mi->context.c2.tls_multi->context_auth = CAS_FAILED; } /* Generate data channel keys only if setting protocol options * has not failed */ else if (!multi_client_generate_tls_keys(&mi->context)) { - mi->context.c2.context_auth = CAS_FAILED; + mi->context.c2.tls_multi->context_auth = CAS_FAILED; } /* send push reply if ready */ @@ -2596,7 +2596,7 @@ multi_connection_established(struct multi_context *m, struct multi_instance *mi) /* We are only called for the CAS_PENDING_x states, so we * can ignore other states here */ - bool from_deferred = (mi->context.c2.context_auth != CAS_PENDING); + bool from_deferred = (mi->context.c2.tls_multi->context_auth != CAS_PENDING); int *cur_handler_index = &mi->client_connect_defer_state.cur_handler_index; unsigned int *option_types_found = @@ -2608,7 +2608,7 @@ multi_connection_established(struct multi_context *m, struct multi_instance *mi) *cur_handler_index = 0; *option_types_found = 0; /* Initially we have no handler that has returned a result */ - mi->context.c2.context_auth = CAS_PENDING_DEFERRED; + mi->context.c2.tls_multi->context_auth = CAS_PENDING_DEFERRED; multi_client_connect_early_setup(m, mi); } @@ -2631,7 +2631,7 @@ multi_connection_established(struct multi_context *m, struct multi_instance *mi) * Remember that we already had at least one handler * returning a result should we go to into deferred state */ - mi->context.c2.context_auth = CAS_PENDING_DEFERRED_PARTIAL; + mi->context.c2.tls_multi->context_auth = CAS_PENDING_DEFERRED_PARTIAL; break; case CC_RET_SKIPPED: @@ -2683,12 +2683,12 @@ multi_connection_established(struct multi_context *m, struct multi_instance *mi) { /* run the disconnect script if we had a connect script that * did not fail */ - if (mi->context.c2.context_auth == CAS_PENDING_DEFERRED_PARTIAL) + if (mi->context.c2.tls_multi->context_auth == CAS_PENDING_DEFERRED_PARTIAL) { multi_client_disconnect_script(mi); } - mi->context.c2.context_auth = CAS_FAILED; + mi->context.c2.tls_multi->context_auth = CAS_FAILED; } /* increment number of current authenticated clients */ @@ -2991,7 +2991,7 @@ multi_process_post(struct multi_context *m, struct multi_instance *mi, const uns { /* connection is "established" when SSL/TLS key negotiation succeeds * and (if specified) auth user/pass succeeds */ - if (is_cas_pending(mi->context.c2.context_auth) + if (is_cas_pending(mi->context.c2.tls_multi->context_auth) && CONNECTION_ESTABLISHED(&mi->context)) { multi_connection_established(m, mi); @@ -3954,7 +3954,7 @@ management_client_auth(void *arg, { if (auth) { - if (is_cas_pending(mi->context.c2.context_auth)) + if (is_cas_pending(mi->context.c2.tls_multi->context_auth)) { set_cc_config(mi, cc_config); cc_config_owned = false; diff --git a/src/openvpn/openvpn.h b/src/openvpn/openvpn.h index 4ca89ba9..0a246d4f 100644 --- a/src/openvpn/openvpn.h +++ b/src/openvpn/openvpn.h @@ -211,17 +211,6 @@ struct context_1 }; -/* client authentication state, CAS_SUCCEEDED must be 0 since - * non multi code path still checks this variable but does not initialise it - * so the code depends on zero initialisation */ -enum client_connect_status { - CAS_SUCCEEDED=0, - CAS_PENDING, - CAS_PENDING_DEFERRED, - CAS_PENDING_DEFERRED_PARTIAL, /**< at least handler succeeded, no result yet*/ - CAS_FAILED, -}; - static inline bool is_cas_pending(enum client_connect_status cas) { @@ -458,9 +447,6 @@ struct context_2 int push_ifconfig_ipv6_netbits; struct in6_addr push_ifconfig_ipv6_remote; - - enum client_connect_status context_auth; - struct event_timeout push_request_interval; int n_sent_push_requests; bool did_pre_pull_restore; diff --git a/src/openvpn/push.c b/src/openvpn/push.c index 26a6201f..25f96d6b 100644 --- a/src/openvpn/push.c +++ b/src/openvpn/push.c @@ -736,14 +736,14 @@ process_incoming_push_request(struct context *c) { int ret = PUSH_MSG_ERROR; - if ((c->c2.tls_multi && tls_authentication_status(c->c2.tls_multi, 0) == TLS_AUTHENTICATION_FAILED) - || c->c2.context_auth == CAS_FAILED) + if (tls_authentication_status(c->c2.tls_multi, 0) == TLS_AUTHENTICATION_FAILED + || c->c2.tls_multi->context_auth == CAS_FAILED) { const char *client_reason = tls_client_reason(c->c2.tls_multi); send_auth_failed(c, client_reason); ret = PUSH_MSG_AUTH_FAILURE; } - else if (c->c2.context_auth == CAS_SUCCEEDED) + else if (c->c2.tls_multi->context_auth == CAS_SUCCEEDED) { time_t now; diff --git a/src/openvpn/ssl_common.h b/src/openvpn/ssl_common.h index f435089a..41d98198 100644 --- a/src/openvpn/ssl_common.h +++ b/src/openvpn/ssl_common.h @@ -480,6 +480,19 @@ struct tls_session */ #define KEY_SCAN_SIZE 3 + +/* client authentication state, CAS_SUCCEEDED must be 0 since + * non multi code path still checks this variable but does not initialise it + * so the code depends on zero initialisation */ +enum client_connect_status { + CAS_SUCCEEDED=0, + CAS_PENDING, + CAS_PENDING_DEFERRED, + CAS_PENDING_DEFERRED_PARTIAL, /**< at least handler succeeded, no result yet*/ + CAS_FAILED, +}; + + /** * Security parameter state for a single VPN tunnel. * @ingroup control_processor @@ -515,6 +528,7 @@ struct tls_multi int n_sessions; /**< Number of sessions negotiated thus * far. */ + enum client_connect_status context_auth; /* * Number of errors. 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See http://spamassassin.org/tag/ for more details. 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: rfc2549.org] 0.2 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level mail domains are different 0.0 SPF_NONE SPF: sender does not publish an SPF Record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-Headers-End: 1kpDPB-00FJ8j-KC Subject: [Openvpn-devel] [PATCH 2/2] Fix condition to generate session keys X-BeenThere: openvpn-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: openvpn-devel-bounces@lists.sourceforge.net X-getmail-retrieved-from-mailbox: Inbox For --nobind clients OpenVPN reuses the context and tls_multi structs of the previous clients and does not rerun the connect scripts on connect. But since it is a new client connection, the key_id is 0 and we postpone the key generation but it will never happen. This commit changes postponing the key generation to the right condition of NCP done for this session. Signed-off-by: Arne Schwabe --- src/openvpn/ssl.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/src/openvpn/ssl.c b/src/openvpn/ssl.c index efbf688f..5d322598 100644 --- a/src/openvpn/ssl.c +++ b/src/openvpn/ssl.c @@ -2351,7 +2351,7 @@ error: * to the TLS control channel (cleartext). */ static bool -key_method_2_write(struct buffer *buf, struct tls_session *session) +key_method_2_write(struct buffer *buf, struct tls_multi *multi, struct tls_session *session) { struct key_state *ks = &session->key[KS_PRIMARY]; /* primary key */ @@ -2442,12 +2442,17 @@ key_method_2_write(struct buffer *buf, struct tls_session *session) goto error; } - /* Generate tunnel keys if we're a TLS server. - * If we're a p2mp server and IV_NCP >= 2 is negotiated, the first key - * generation is postponed until after the pull/push, so we can process pushed - * cipher directives. + /* + * Generate tunnel keys if we're a TLS server. + * + * If we're a p2mp server to allow NCP, the first key + * generation is postponed until after the connect script finished and the + * NCP options can be processed. Since that always happens at after connect + * script options are available the CAS_SUCCEEDED status is identical to + * NCP options are processed and we have no extra state for NCP finished. */ - if (session->opt->server && !(session->opt->mode == MODE_SERVER && ks->key_id <= 0)) + if (session->opt->server && (session->opt->mode != MODE_SERVER + || multi->context_auth == CAS_SUCCEEDED)) { if (ks->authenticated > KS_AUTH_FALSE) { @@ -2936,7 +2941,7 @@ tls_process(struct tls_multi *multi, if (!buf->len && ((ks->state == S_START && !session->opt->server) || (ks->state == S_GOT_KEY && session->opt->server))) { - if (!key_method_2_write(buf, session)) + if (!key_method_2_write(buf, multi, session)) { goto error; }