1 files changed, 401 insertions, 0 deletions

diff --git a/src/seastar/dpdk/examples/ipsec-secgw/esp.c b/src/seastar/dpdk/examples/ipsec-secgw/esp.c
new file mode 100644
index 00000000..e77afa0e
--- /dev/null
+++ b/src/seastar/dpdk/examples/ipsec-secgw/esp.c
@@ -0,0 +1,401 @@
+/*-
+ *   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 <netinet/ip6.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <rte_common.h>
+#include <rte_crypto.h>
+#include <rte_cryptodev.h>
+#include <rte_random.h>
+
+#include "ipsec.h"
+#include "esp.h"
+#include "ipip.h"
+
+int
+esp_inbound(struct rte_mbuf *m, struct ipsec_sa *sa,
+		struct rte_crypto_op *cop)
+{
+	struct ip *ip4;
+	struct rte_crypto_sym_op *sym_cop;
+	int32_t payload_len, ip_hdr_len;
+
+	RTE_ASSERT(m != NULL);
+	RTE_ASSERT(sa != NULL);
+	RTE_ASSERT(cop != NULL);
+
+	ip4 = rte_pktmbuf_mtod(m, struct ip *);
+	if (likely(ip4->ip_v == IPVERSION))
+		ip_hdr_len = ip4->ip_hl * 4;
+	else if (ip4->ip_v == IP6_VERSION)
+		/* XXX No option headers supported */
+		ip_hdr_len = sizeof(struct ip6_hdr);
+	else {
+		RTE_LOG(ERR, IPSEC_ESP, "invalid IP packet type %d\n",
+				ip4->ip_v);
+		return -EINVAL;
+	}
+
+	payload_len = rte_pktmbuf_pkt_len(m) - ip_hdr_len -
+		sizeof(struct esp_hdr) - sa->iv_len - sa->digest_len;
+
+	if ((payload_len & (sa->block_size - 1)) || (payload_len <= 0)) {
+		RTE_LOG_DP(DEBUG, IPSEC_ESP, "payload %d not multiple of %u\n",
+				payload_len, sa->block_size);
+		return -EINVAL;
+	}
+
+	sym_cop = get_sym_cop(cop);
+
+	sym_cop->m_src = m;
+	sym_cop->cipher.data.offset =  ip_hdr_len + sizeof(struct esp_hdr) +
+		sa->iv_len;
+	sym_cop->cipher.data.length = payload_len;
+
+	struct cnt_blk *icb;
+	uint8_t *aad;
+	uint8_t *iv = RTE_PTR_ADD(ip4, ip_hdr_len + sizeof(struct esp_hdr));
+
+	switch (sa->cipher_algo) {
+	case RTE_CRYPTO_CIPHER_NULL:
+	case RTE_CRYPTO_CIPHER_AES_CBC:
+		sym_cop->cipher.iv.data = iv;
+		sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m,
+				 ip_hdr_len + sizeof(struct esp_hdr));
+		sym_cop->cipher.iv.length = sa->iv_len;
+		break;
+	case RTE_CRYPTO_CIPHER_AES_CTR:
+	case RTE_CRYPTO_CIPHER_AES_GCM:
+		icb = get_cnt_blk(m);
+		icb->salt = sa->salt;
+		memcpy(&icb->iv, iv, 8);
+		icb->cnt = rte_cpu_to_be_32(1);
+		sym_cop->cipher.iv.data = (uint8_t *)icb;
+		sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m,
+			 (uint8_t *)icb - rte_pktmbuf_mtod(m, uint8_t *));
+		sym_cop->cipher.iv.length = 16;
+		break;
+	default:
+		RTE_LOG(ERR, IPSEC_ESP, "unsupported cipher algorithm %u\n",
+				sa->cipher_algo);
+		return -EINVAL;
+	}
+
+	switch (sa->auth_algo) {
+	case RTE_CRYPTO_AUTH_NULL:
+	case RTE_CRYPTO_AUTH_SHA1_HMAC:
+	case RTE_CRYPTO_AUTH_SHA256_HMAC:
+		sym_cop->auth.data.offset = ip_hdr_len;
+		sym_cop->auth.data.length = sizeof(struct esp_hdr) +
+			sa->iv_len + payload_len;
+		break;
+	case RTE_CRYPTO_AUTH_AES_GCM:
+		aad = get_aad(m);
+		memcpy(aad, iv - sizeof(struct esp_hdr), 8);
+		sym_cop->auth.aad.data = aad;
+		sym_cop->auth.aad.phys_addr = rte_pktmbuf_mtophys_offset(m,
+				aad - rte_pktmbuf_mtod(m, uint8_t *));
+		sym_cop->auth.aad.length = 8;
+		break;
+	default:
+		RTE_LOG(ERR, IPSEC_ESP, "unsupported auth algorithm %u\n",
+				sa->auth_algo);
+		return -EINVAL;
+	}
+
+	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
+esp_inbound_post(struct rte_mbuf *m, struct ipsec_sa *sa,
+		struct rte_crypto_op *cop)
+{
+	struct ip *ip4, *ip;
+	struct ip6_hdr *ip6;
+	uint8_t *nexthdr, *pad_len;
+	uint8_t *padding;
+	uint16_t i;
+
+	RTE_ASSERT(m != NULL);
+	RTE_ASSERT(sa != NULL);
+	RTE_ASSERT(cop != NULL);
+
+	if (cop->status != RTE_CRYPTO_OP_STATUS_SUCCESS) {
+		RTE_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 + 1) {
+			RTE_LOG(ERR, IPSEC_ESP, "invalid padding\n");
+			return -EINVAL;
+		}
+	}
+
+	if (rte_pktmbuf_trim(m, *pad_len + 2 + sa->digest_len)) {
+		RTE_LOG(ERR, IPSEC_ESP,
+				"failed to remove pad_len + digest\n");
+		return -EINVAL;
+	}
+
+	if (unlikely(sa->flags == TRANSPORT)) {
+		ip = rte_pktmbuf_mtod(m, struct ip *);
+		ip4 = (struct ip *)rte_pktmbuf_adj(m,
+				sizeof(struct esp_hdr) + sa->iv_len);
+		if (likely(ip->ip_v == IPVERSION)) {
+			memmove(ip4, ip, ip->ip_hl * 4);
+			ip4->ip_p = *nexthdr;
+			ip4->ip_len = htons(rte_pktmbuf_data_len(m));
+		} else {
+			ip6 = (struct ip6_hdr *)ip4;
+			/* XXX No option headers supported */
+			memmove(ip6, ip, sizeof(struct ip6_hdr));
+			ip6->ip6_nxt = *nexthdr;
+			ip6->ip6_plen = htons(rte_pktmbuf_data_len(m));
+		}
+	} else
+		ipip_inbound(m, sizeof(struct esp_hdr) + sa->iv_len);
+
+	return 0;
+}
+
+int
+esp_outbound(struct rte_mbuf *m, struct ipsec_sa *sa,
+		struct rte_crypto_op *cop)
+{
+	struct ip *ip4;
+	struct ip6_hdr *ip6;
+	struct esp_hdr *esp = NULL;
+	uint8_t *padding, *new_ip, nlp;
+	struct rte_crypto_sym_op *sym_cop;
+	int32_t i;
+	uint16_t pad_payload_len, pad_len, ip_hdr_len;
+
+	RTE_ASSERT(m != NULL);
+	RTE_ASSERT(sa != NULL);
+	RTE_ASSERT(cop != NULL);
+
+	ip_hdr_len = 0;
+
+	ip4 = rte_pktmbuf_mtod(m, struct ip *);
+	if (likely(ip4->ip_v == IPVERSION)) {
+		if (unlikely(sa->flags == TRANSPORT)) {
+			ip_hdr_len = ip4->ip_hl * 4;
+			nlp = ip4->ip_p;
+		} else
+			nlp = IPPROTO_IPIP;
+	} else if (ip4->ip_v == IP6_VERSION) {
+		if (unlikely(sa->flags == TRANSPORT)) {
+			/* XXX No option headers supported */
+			ip_hdr_len = sizeof(struct ip6_hdr);
+			ip6 = (struct ip6_hdr *)ip4;
+			nlp = ip6->ip6_nxt;
+		} else
+			nlp = IPPROTO_IPV6;
+	} else {
+		RTE_LOG(ERR, IPSEC_ESP, "invalid IP packet type %d\n",
+				ip4->ip_v);
+		return -EINVAL;
+	}
+
+	/* Padded payload length */
+	pad_payload_len = RTE_ALIGN_CEIL(rte_pktmbuf_pkt_len(m) -
+			ip_hdr_len + 2, sa->block_size);
+	pad_len = pad_payload_len + ip_hdr_len - rte_pktmbuf_pkt_len(m);
+
+	RTE_ASSERT(sa->flags == IP4_TUNNEL || sa->flags == IP6_TUNNEL ||
+			sa->flags == TRANSPORT);
+
+	if (likely(sa->flags == IP4_TUNNEL))
+		ip_hdr_len = sizeof(struct ip);
+	else if (sa->flags == IP6_TUNNEL)
+		ip_hdr_len = sizeof(struct ip6_hdr);
+	else if (sa->flags != TRANSPORT) {
+		RTE_LOG(ERR, IPSEC_ESP, "Unsupported SA flags: 0x%x\n",
+				sa->flags);
+		return -EINVAL;
+	}
+
+	/* Check maximum packet size */
+	if (unlikely(ip_hdr_len + sizeof(struct esp_hdr) + sa->iv_len +
+			pad_payload_len + sa->digest_len > IP_MAXPACKET)) {
+		RTE_LOG(ERR, IPSEC_ESP, "ipsec packet is too big\n");
+		return -EINVAL;
+	}
+
+	padding = (uint8_t *)rte_pktmbuf_append(m, pad_len + sa->digest_len);
+	if (unlikely(padding == NULL)) {
+		RTE_LOG(ERR, IPSEC_ESP, "not enough mbuf trailing space\n");
+		return -ENOSPC;
+	}
+	rte_prefetch0(padding);
+
+	switch (sa->flags) {
+	case IP4_TUNNEL:
+		ip4 = ip4ip_outbound(m, sizeof(struct esp_hdr) + sa->iv_len,
+				&sa->src, &sa->dst);
+		esp = (struct esp_hdr *)(ip4 + 1);
+		break;
+	case IP6_TUNNEL:
+		ip6 = ip6ip_outbound(m, sizeof(struct esp_hdr) + sa->iv_len,
+				&sa->src, &sa->dst);
+		esp = (struct esp_hdr *)(ip6 + 1);
+		break;
+	case TRANSPORT:
+		new_ip = (uint8_t *)rte_pktmbuf_prepend(m,
+				sizeof(struct esp_hdr) + sa->iv_len);
+		memmove(new_ip, ip4, ip_hdr_len);
+		esp = (struct esp_hdr *)(new_ip + ip_hdr_len);
+		if (likely(ip4->ip_v == IPVERSION)) {
+			ip4 = (struct ip *)new_ip;
+			ip4->ip_p = IPPROTO_ESP;
+			ip4->ip_len = htons(rte_pktmbuf_data_len(m));
+		} else {
+			ip6 = (struct ip6_hdr *)new_ip;
+			ip6->ip6_nxt = IPPROTO_ESP;
+			ip6->ip6_plen = htons(rte_pktmbuf_data_len(m));
+		}
+	}
+
+	sa->seq++;
+	esp->spi = rte_cpu_to_be_32(sa->spi);
+	esp->seq = rte_cpu_to_be_32((uint32_t)sa->seq);
+
+	uint64_t *iv = (uint64_t *)(esp + 1);
+
+	sym_cop = get_sym_cop(cop);
+	sym_cop->m_src = m;
+	switch (sa->cipher_algo) {
+	case RTE_CRYPTO_CIPHER_NULL:
+	case RTE_CRYPTO_CIPHER_AES_CBC:
+		memset(iv, 0, sa->iv_len);
+		sym_cop->cipher.data.offset = ip_hdr_len +
+			sizeof(struct esp_hdr);
+		sym_cop->cipher.data.length = pad_payload_len + sa->iv_len;
+		break;
+	case RTE_CRYPTO_CIPHER_AES_CTR:
+	case RTE_CRYPTO_CIPHER_AES_GCM:
+		*iv = sa->seq;
+		sym_cop->cipher.data.offset = ip_hdr_len +
+			sizeof(struct esp_hdr) + sa->iv_len;
+		sym_cop->cipher.data.length = pad_payload_len;
+		break;
+	default:
+		RTE_LOG(ERR, IPSEC_ESP, "unsupported cipher algorithm %u\n",
+				sa->cipher_algo);
+		return -EINVAL;
+	}
+
+	/* 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] = nlp;
+
+	struct cnt_blk *icb = get_cnt_blk(m);
+	icb->salt = sa->salt;
+	icb->iv = sa->seq;
+	icb->cnt = rte_cpu_to_be_32(1);
+	sym_cop->cipher.iv.data = (uint8_t *)icb;
+	sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(m,
+			 (uint8_t *)icb - rte_pktmbuf_mtod(m, uint8_t *));
+	sym_cop->cipher.iv.length = 16;
+
+	uint8_t *aad;
+
+	switch (sa->auth_algo) {
+	case RTE_CRYPTO_AUTH_NULL:
+	case RTE_CRYPTO_AUTH_SHA1_HMAC:
+	case RTE_CRYPTO_AUTH_SHA256_HMAC:
+		sym_cop->auth.data.offset = ip_hdr_len;
+		sym_cop->auth.data.length = sizeof(struct esp_hdr) +
+			sa->iv_len + pad_payload_len;
+		break;
+	case RTE_CRYPTO_AUTH_AES_GCM:
+		aad = get_aad(m);
+		memcpy(aad, esp, 8);
+		sym_cop->auth.aad.data = aad;
+		sym_cop->auth.aad.phys_addr = rte_pktmbuf_mtophys_offset(m,
+				aad - rte_pktmbuf_mtod(m, uint8_t *));
+		sym_cop->auth.aad.length = 8;
+		break;
+	default:
+		RTE_LOG(ERR, IPSEC_ESP, "unsupported auth algorithm %u\n",
+				sa->auth_algo);
+		return -EINVAL;
+	}
+
+	sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(m, uint8_t *,
+			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
+esp_outbound_post(struct rte_mbuf *m __rte_unused,
+		struct ipsec_sa *sa __rte_unused,
+		struct rte_crypto_op *cop)
+{
+	RTE_ASSERT(m != NULL);
+	RTE_ASSERT(sa != NULL);
+	RTE_ASSERT(cop != NULL);
+
+	if (cop->status != RTE_CRYPTO_OP_STATUS_SUCCESS) {
+		RTE_LOG(ERR, IPSEC_ESP, "Failed crypto op\n");
+		return -1;
+	}
+
+	return 0;
+}