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[54.197.127.237]) by mx.google.com with ESMTP id b84si10167536qkb.17.2017.11.13.06.12.26; Mon, 13 Nov 2017 06:12:26 -0800 (PST) Received-SPF: pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.197.127.237 as permitted sender) client-ip=54.197.127.237; Authentication-Results: mx.google.com; spf=pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.197.127.237 as permitted sender) smtp.mailfrom=lng-odp-bounces@lists.linaro.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=yandex.ru Received: by lists.linaro.org (Postfix, from userid 109) id 0822460C47; Mon, 13 Nov 2017 14:12:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on ip-10-142-244-252 X-Spam-Level: X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00,FREEMAIL_FROM, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from [127.0.0.1] (localhost [127.0.0.1]) by lists.linaro.org (Postfix) with ESMTP id 70EFC60FFA; Mon, 13 Nov 2017 14:01:51 +0000 (UTC) X-Original-To: lng-odp@lists.linaro.org Delivered-To: lng-odp@lists.linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id 0DA936103A; Mon, 13 Nov 2017 14:01:32 +0000 (UTC) Received: from forward104p.mail.yandex.net (forward104p.mail.yandex.net [77.88.28.107]) by lists.linaro.org (Postfix) with ESMTPS id 0D4EE608EE for ; Mon, 13 Nov 2017 14:00:33 +0000 (UTC) Received: from mxback15j.mail.yandex.net (mxback15j.mail.yandex.net [IPv6:2a02:6b8:0:1619::91]) by forward104p.mail.yandex.net (Yandex) with ESMTP id CCD5F181C27 for ; Mon, 13 Nov 2017 17:00:31 +0300 (MSK) Received: from smtp2p.mail.yandex.net (smtp2p.mail.yandex.net [2a02:6b8:0:1472:2741:0:8b6:7]) by mxback15j.mail.yandex.net (nwsmtp/Yandex) with ESMTP id nEYzjVmPVL-0Vh4Yjue; Mon, 13 Nov 2017 17:00:31 +0300 Received: by smtp2p.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id 955rfAmciQ-0VkSoGVV; Mon, 13 Nov 2017 17:00:31 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (Client certificate not present) From: Github ODP bot To: lng-odp@lists.linaro.org Date: Mon, 13 Nov 2017 17:00:15 +0300 Message-Id: <1510581630-13993-2-git-send-email-odpbot@yandex.ru> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1510581630-13993-1-git-send-email-odpbot@yandex.ru> References: <1510581630-13993-1-git-send-email-odpbot@yandex.ru> Github-pr-num: 243 Subject: [lng-odp] [PATCH API-NEXT v16 1/16] linux-gen: ipsec: use counter instead of random IV for GCM X-BeenThere: lng-odp@lists.linaro.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: "The OpenDataPlane \(ODP\) List" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: lng-odp-bounces@lists.linaro.org Sender: "lng-odp" From: Dmitry Eremin-Solenikov Reusing IV block with GCM results in disastrous consequences. Use counter instead of random-generated IV to remove possibility for IV reuse. Signed-off-by: Dmitry Eremin-Solenikov --- /** Email created from pull request 243 (lumag:ipsec-packet-impl-3) ** https://github.com/Linaro/odp/pull/243 ** Patch: https://github.com/Linaro/odp/pull/243.patch ** Base sha: a908a4dead95321e84d6a8a23de060051dcd8969 ** Merge commit sha: 845914564f2d99792452ac22a524279f44496a1d **/ .../linux-generic/include/odp_ipsec_internal.h | 16 ++++++++++--- platform/linux-generic/odp_ipsec.c | 28 +++++++++++++++------- platform/linux-generic/odp_ipsec_sad.c | 9 +++++++ 3 files changed, 42 insertions(+), 11 deletions(-) diff --git a/platform/linux-generic/include/odp_ipsec_internal.h b/platform/linux-generic/include/odp_ipsec_internal.h index 1340ca7bd..afc2f686e 100644 --- a/platform/linux-generic/include/odp_ipsec_internal.h +++ b/platform/linux-generic/include/odp_ipsec_internal.h @@ -118,9 +118,17 @@ struct ipsec_sa_s { uint8_t salt[IPSEC_MAX_SALT_LEN]; uint32_t salt_length; - unsigned dec_ttl : 1; - unsigned copy_dscp : 1; - unsigned copy_df : 1; + union { + unsigned flags; + struct { + unsigned dec_ttl : 1; + unsigned copy_dscp : 1; + unsigned copy_df : 1; + + /* Only for outbound */ + unsigned use_counter_iv : 1; + }; + }; union { struct { @@ -136,6 +144,8 @@ struct ipsec_sa_s { odp_atomic_u32_t tun_hdr_id; odp_atomic_u32_t seq; + odp_atomic_u64_t counter; /* for CTR/GCM */ + uint8_t tun_ttl; uint8_t tun_dscp; uint8_t tun_df; diff --git a/platform/linux-generic/odp_ipsec.c b/platform/linux-generic/odp_ipsec.c index e57736c2a..6a731e999 100644 --- a/platform/linux-generic/odp_ipsec.c +++ b/platform/linux-generic/odp_ipsec.c @@ -676,23 +676,36 @@ static ipsec_sa_t *ipsec_out_single(odp_packet_t pkt, ip_data_len + ipsec_sa->icv_len; - if (ipsec_sa->esp_iv_len) { + if (ipsec_sa->use_counter_iv) { + uint64_t ctr; + + /* Both GCM and CTR use 8-bit counters */ + ODP_ASSERT(sizeof(ctr) == ipsec_sa->esp_iv_len); + + ctr = odp_atomic_fetch_add_u64(&ipsec_sa->out.counter, + 1); + /* Check for overrun */ + if (ctr == 0) + goto out; + + memcpy(iv, ipsec_sa->salt, ipsec_sa->salt_length); + memcpy(iv + ipsec_sa->salt_length, &ctr, + ipsec_sa->esp_iv_len); + + } else if (ipsec_sa->esp_iv_len) { uint32_t len; - len = odp_random_data(iv + ipsec_sa->salt_length, - ipsec_sa->esp_iv_len, + len = odp_random_data(iv, ipsec_sa->esp_iv_len, ODP_RANDOM_CRYPTO); if (len != ipsec_sa->esp_iv_len) { status->error.alg = 1; goto out; } - - memcpy(iv, ipsec_sa->salt, ipsec_sa->salt_length); - - param.override_iv_ptr = iv; } + param.override_iv_ptr = iv; + if (odp_packet_extend_tail(&pkt, trl_len, NULL, NULL) < 0) { status->error.alg = 1; goto out; @@ -734,7 +747,6 @@ static ipsec_sa_t *ipsec_out_single(odp_packet_t pkt, odp_packet_copy_from_mem(pkt, ipsec_offset, _ODP_ESPHDR_LEN, &esp); - memcpy(iv, ipsec_sa->salt, ipsec_sa->salt_length); odp_packet_copy_from_mem(pkt, ipsec_offset + _ODP_ESPHDR_LEN, ipsec_sa->esp_iv_len, diff --git a/platform/linux-generic/odp_ipsec_sad.c b/platform/linux-generic/odp_ipsec_sad.c index f0b5b9e4a..dc338bfcd 100644 --- a/platform/linux-generic/odp_ipsec_sad.c +++ b/platform/linux-generic/odp_ipsec_sad.c @@ -207,6 +207,7 @@ odp_ipsec_sa_t odp_ipsec_sa_create(const odp_ipsec_sa_param_t *param) ipsec_sa->context = param->context; ipsec_sa->queue = param->dest_queue; ipsec_sa->mode = param->mode; + ipsec_sa->flags = 0; if (ODP_IPSEC_DIR_INBOUND == param->dir) { ipsec_sa->in.lookup_mode = param->inbound.lookup_mode; if (ODP_IPSEC_LOOKUP_DSTADDR_SPI == ipsec_sa->in.lookup_mode) @@ -298,11 +299,13 @@ odp_ipsec_sa_t odp_ipsec_sa_create(const odp_ipsec_sa_param_t *param) case ODP_CIPHER_ALG_NULL: ipsec_sa->esp_iv_len = 0; ipsec_sa->esp_block_len = 1; + crypto_param.iv.length = 0; break; case ODP_CIPHER_ALG_DES: case ODP_CIPHER_ALG_3DES_CBC: ipsec_sa->esp_iv_len = 8; ipsec_sa->esp_block_len = 8; + crypto_param.iv.length = 8; break; #if ODP_DEPRECATED_API case ODP_CIPHER_ALG_AES128_CBC: @@ -310,11 +313,13 @@ odp_ipsec_sa_t odp_ipsec_sa_create(const odp_ipsec_sa_param_t *param) case ODP_CIPHER_ALG_AES_CBC: ipsec_sa->esp_iv_len = 16; ipsec_sa->esp_block_len = 16; + crypto_param.iv.length = 16; break; #if ODP_DEPRECATED_API case ODP_CIPHER_ALG_AES128_GCM: #endif case ODP_CIPHER_ALG_AES_GCM: + ipsec_sa->use_counter_iv = 1; ipsec_sa->esp_iv_len = 8; ipsec_sa->esp_block_len = 16; crypto_param.iv.length = 12; @@ -323,6 +328,10 @@ odp_ipsec_sa_t odp_ipsec_sa_create(const odp_ipsec_sa_param_t *param) return ODP_IPSEC_SA_INVALID; } + if (1 == ipsec_sa->use_counter_iv && + ODP_IPSEC_DIR_OUTBOUND == param->dir) + odp_atomic_init_u64(&ipsec_sa->out.counter, 1); + crypto_param.auth_digest_len = ipsec_sa->icv_len; if (param->crypto.cipher_key_extra.length) {