X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=examples%2Fipsec-secgw%2Fesp.c;fp=examples%2Fipsec-secgw%2Fesp.c;h=192738078c4a90090c882a7c669ce9b3cda55a9a;hb=97f17497d162afdb82c8704bf097f0fee3724b2e;hp=0000000000000000000000000000000000000000;hpb=e04be89c2409570e0055b2cda60bd11395bb93b0;p=deb_dpdk.git

diff --git a/examples/ipsec-secgw/esp.c b/examples/ipsec-secgw/esp.c
new file mode 100644
index 00000000..19273807
--- /dev/null
+++ b/examples/ipsec-secgw/esp.c
@@ -0,0 +1,251 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2016 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <rte_common.h>
+#include <rte_memcpy.h>
+#include <rte_crypto.h>
+#include <rte_cryptodev.h>
+#include <rte_random.h>
+
+#include "ipsec.h"
+#include "esp.h"
+#include "ipip.h"
+
+#define IP_ESP_HDR_SZ (sizeof(struct ip) + sizeof(struct esp_hdr))
+
+static inline void
+random_iv_u64(uint64_t *buf, uint16_t n)
+{
+	unsigned left = n & 0x7;
+	unsigned i;
+
+	IPSEC_ASSERT((n & 0x3) == 0);
+
+	for (i = 0; i < (n >> 3); i++)
+		buf[i] = rte_rand();
+
+	if (left)
+		*((uint32_t *)&buf[i]) = (uint32_t)lrand48();
+}
+
+/* IPv4 Tunnel */
+int
+esp4_tunnel_inbound_pre_crypto(struct rte_mbuf *m, struct ipsec_sa *sa,
+		struct rte_crypto_op *cop)
+{
+	int32_t payload_len;
+	struct rte_crypto_sym_op *sym_cop;
+
+	IPSEC_ASSERT(m != NULL);
+	IPSEC_ASSERT(sa != NULL);
+	IPSEC_ASSERT(cop != NULL);
+
+	payload_len = rte_pktmbuf_pkt_len(m) - IP_ESP_HDR_SZ - sa->iv_len -
+		sa->digest_len;
+
+	if ((payload_len & (sa->block_size - 1)) || (payload_len <= 0)) {
+		IPSEC_LOG(DEBUG, IPSEC_ESP, "payload %d not multiple of %u\n",
+				payload_len, sa->block_size);
+		return -EINVAL;
+	}
+
+	sym_cop = (struct rte_crypto_sym_op *)(cop + 1);
+
+	sym_cop->m_src = m;
+	sym_cop->cipher.data.offset = IP_ESP_HDR_SZ + sa->iv_len;
+	sym_cop->cipher.data.length = payload_len;
+
+	sym_cop->cipher.iv.data = rte_pktmbuf_mtod_offset(m, void*,
+			IP_ESP_HDR_SZ);
+	sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m,
+			IP_ESP_HDR_SZ);
+	sym_cop->cipher.iv.length = sa->iv_len;
+
+	sym_cop->auth.data.offset = sizeof(struct ip);
+	if (sa->auth_algo == RTE_CRYPTO_AUTH_AES_GCM)
+		sym_cop->auth.data.length = sizeof(struct esp_hdr);
+	else
+		sym_cop->auth.data.length = sizeof(struct esp_hdr) +
+			sa->iv_len + payload_len;
+
+	sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(m, void*,
+			rte_pktmbuf_pkt_len(m) - sa->digest_len);
+	sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset(m,
+			rte_pktmbuf_pkt_len(m) - sa->digest_len);
+	sym_cop->auth.digest.length = sa->digest_len;
+
+	return 0;
+}
+
+int
+esp4_tunnel_inbound_post_crypto(struct rte_mbuf *m, struct ipsec_sa *sa,
+		struct rte_crypto_op *cop)
+{
+	uint8_t *nexthdr, *pad_len;
+	uint8_t *padding;
+	uint16_t i;
+
+	IPSEC_ASSERT(m != NULL);
+	IPSEC_ASSERT(sa != NULL);
+	IPSEC_ASSERT(cop != NULL);
+
+	if (cop->status != RTE_CRYPTO_OP_STATUS_SUCCESS) {
+		IPSEC_LOG(ERR, IPSEC_ESP, "Failed crypto op\n");
+		return -1;
+	}
+
+	nexthdr = rte_pktmbuf_mtod_offset(m, uint8_t*,
+			rte_pktmbuf_pkt_len(m) - sa->digest_len - 1);
+	pad_len = nexthdr - 1;
+
+	padding = pad_len - *pad_len;
+	for (i = 0; i < *pad_len; i++) {
+		if (padding[i] != i) {
+			IPSEC_LOG(ERR, IPSEC_ESP, "invalid pad_len field\n");
+			return -EINVAL;
+		}
+	}
+
+	if (rte_pktmbuf_trim(m, *pad_len + 2 + sa->digest_len)) {
+		IPSEC_LOG(ERR, IPSEC_ESP,
+				"failed to remove pad_len + digest\n");
+		return -EINVAL;
+	}
+
+	return ip4ip_inbound(m, sizeof(struct esp_hdr) + sa->iv_len);
+}
+
+int
+esp4_tunnel_outbound_pre_crypto(struct rte_mbuf *m, struct ipsec_sa *sa,
+		struct rte_crypto_op *cop)
+{
+	uint16_t pad_payload_len, pad_len;
+	struct ip *ip;
+	struct esp_hdr *esp;
+	int i;
+	char *padding;
+	struct rte_crypto_sym_op *sym_cop;
+
+	IPSEC_ASSERT(m != NULL);
+	IPSEC_ASSERT(sa != NULL);
+	IPSEC_ASSERT(cop != NULL);
+
+	/* Payload length */
+	pad_payload_len = RTE_ALIGN_CEIL(rte_pktmbuf_pkt_len(m) + 2,
+			sa->block_size);
+	pad_len = pad_payload_len - rte_pktmbuf_pkt_len(m);
+
+	rte_prefetch0(rte_pktmbuf_mtod_offset(m, void *,
+				rte_pktmbuf_pkt_len(m)));
+
+	/* Check maximum packet size */
+	if (unlikely(IP_ESP_HDR_SZ + sa->iv_len + pad_payload_len +
+				sa->digest_len > IP_MAXPACKET)) {
+		IPSEC_LOG(DEBUG, IPSEC_ESP, "ipsec packet is too big\n");
+		return -EINVAL;
+	}
+
+	padding = rte_pktmbuf_append(m, pad_len + sa->digest_len);
+
+	IPSEC_ASSERT(padding != NULL);
+
+	ip = ip4ip_outbound(m, sizeof(struct esp_hdr) + sa->iv_len,
+			sa->src, sa->dst);
+
+	esp = (struct esp_hdr *)(ip + 1);
+	esp->spi = sa->spi;
+	esp->seq = htonl(sa->seq++);
+
+	IPSEC_LOG(DEBUG, IPSEC_ESP, "pktlen %u\n", rte_pktmbuf_pkt_len(m));
+
+	/* Fill pad_len using default sequential scheme */
+	for (i = 0; i < pad_len - 2; i++)
+		padding[i] = i + 1;
+
+	padding[pad_len - 2] = pad_len - 2;
+	padding[pad_len - 1] = IPPROTO_IPIP;
+
+	sym_cop = (struct rte_crypto_sym_op *)(cop + 1);
+
+	sym_cop->m_src = m;
+	sym_cop->cipher.data.offset = IP_ESP_HDR_SZ + sa->iv_len;
+	sym_cop->cipher.data.length = pad_payload_len;
+
+	sym_cop->cipher.iv.data = rte_pktmbuf_mtod_offset(m, uint8_t *,
+			IP_ESP_HDR_SZ);
+	sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m,
+			IP_ESP_HDR_SZ);
+	sym_cop->cipher.iv.length = sa->iv_len;
+
+	sym_cop->auth.data.offset = sizeof(struct ip);
+	sym_cop->auth.data.length = sizeof(struct esp_hdr) + sa->iv_len +
+		pad_payload_len;
+
+	sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(m, uint8_t *,
+			IP_ESP_HDR_SZ + sa->iv_len + pad_payload_len);
+	sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset(m,
+			IP_ESP_HDR_SZ + sa->iv_len + pad_payload_len);
+	sym_cop->auth.digest.length = sa->digest_len;
+
+	if (sa->cipher_algo == RTE_CRYPTO_CIPHER_AES_CBC)
+		random_iv_u64((uint64_t *)sym_cop->cipher.iv.data,
+				sym_cop->cipher.iv.length);
+
+	return 0;
+}
+
+int
+esp4_tunnel_outbound_post_crypto(struct rte_mbuf *m __rte_unused,
+		struct ipsec_sa *sa __rte_unused,
+		struct rte_crypto_op *cop)
+{
+	IPSEC_ASSERT(m != NULL);
+	IPSEC_ASSERT(sa != NULL);
+	IPSEC_ASSERT(cop != NULL);
+
+	if (cop->status != RTE_CRYPTO_OP_STATUS_SUCCESS) {
+		IPSEC_LOG(ERR, IPSEC_ESP, "Failed crypto op\n");
+		return -1;
+	}
+
+	return 0;
+}