Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Millar:
 "Here are some highlights from the 2065 networking commits that
  happened this development cycle:

   1) XDP support for IXGBE (John Fastabend) and thunderx (Sunil Kowuri)

   2) Add a generic XDP driver, so that anyone can test XDP even if they
      lack a networking device whose driver has explicit XDP support
      (me).

   3) Sparc64 now has an eBPF JIT too (me)

   4) Add a BPF program testing framework via BPF_PROG_TEST_RUN (Alexei
      Starovoitov)

   5) Make netfitler network namespace teardown less expensive (Florian
      Westphal)

   6) Add symmetric hashing support to nft_hash (Laura Garcia Liebana)

   7) Implement NAPI and GRO in netvsc driver (Stephen Hemminger)

   8) Support TC flower offload statistics in mlxsw (Arkadi Sharshevsky)

   9) Multiqueue support in stmmac driver (Joao Pinto)

  10) Remove TCP timewait recycling, it never really could possibly work
      well in the real world and timestamp randomization really zaps any
      hint of usability this feature had (Soheil Hassas Yeganeh)

  11) Support level3 vs level4 ECMP route hashing in ipv4 (Nikolay
      Aleksandrov)

  12) Add socket busy poll support to epoll (Sridhar Samudrala)

  13) Netlink extended ACK support (Johannes Berg, Pablo Neira Ayuso,
      and several others)

  14) IPSEC hw offload infrastructure (Steffen Klassert)"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2065 commits)
  tipc: refactor function tipc_sk_recv_stream()
  tipc: refactor function tipc_sk_recvmsg()
  net: thunderx: Optimize page recycling for XDP
  net: thunderx: Support for XDP header adjustment
  net: thunderx: Add support for XDP_TX
  net: thunderx: Add support for XDP_DROP
  net: thunderx: Add basic XDP support
  net: thunderx: Cleanup receive buffer allocation
  net: thunderx: Optimize CQE_TX handling
  net: thunderx: Optimize RBDR descriptor handling
  net: thunderx: Support for page recycling
  ipx: call ipxitf_put() in ioctl error path
  net: sched: add helpers to handle extended actions
  qed*: Fix issues in the ptp filter config implementation.
  qede: Fix concurrency issue in PTP Tx path processing.
  stmmac: Add support for SIMATIC IOT2000 platform
  net: hns: fix ethtool_get_strings overflow in hns driver
  tcp: fix wraparound issue in tcp_lp
  bpf, arm64: fix jit branch offset related to ldimm64
  bpf, arm64: implement jiting of BPF_XADD
  ...

1 files changed, 231 insertions, 0 deletions

diff --git a/net/bluetooth/ecdh_helper.c b/net/bluetooth/ecdh_helper.c
new file mode 100644
index 000000000000..24d4e60f8c48
--- /dev/null
+++ b/net/bluetooth/ecdh_helper.c
@@ -0,0 +1,231 @@
+/*
+ * ECDH helper functions - KPP wrappings
+ *
+ * Copyright (C) 2017 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ * CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+ * COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+ * SOFTWARE IS DISCLAIMED.
+ */
+#include "ecdh_helper.h"
+
+#include <linux/scatterlist.h>
+#include <crypto/kpp.h>
+#include <crypto/ecdh.h>
+
+struct ecdh_completion {
+	struct completion completion;
+	int err;
+};
+
+static void ecdh_complete(struct crypto_async_request *req, int err)
+{
+	struct ecdh_completion *res = req->data;
+
+	if (err == -EINPROGRESS)
+		return;
+
+	res->err = err;
+	complete(&res->completion);
+}
+
+static inline void swap_digits(u64 *in, u64 *out, unsigned int ndigits)
+{
+	int i;
+
+	for (i = 0; i < ndigits; i++)
+		out[i] = __swab64(in[ndigits - 1 - i]);
+}
+
+bool compute_ecdh_secret(const u8 public_key[64], const u8 private_key[32],
+			 u8 secret[32])
+{
+	struct crypto_kpp *tfm;
+	struct kpp_request *req;
+	struct ecdh p;
+	struct ecdh_completion result;
+	struct scatterlist src, dst;
+	u8 *tmp, *buf;
+	unsigned int buf_len;
+	int err = -ENOMEM;
+
+	tmp = kmalloc(64, GFP_KERNEL);
+	if (!tmp)
+		return false;
+
+	tfm = crypto_alloc_kpp("ecdh", CRYPTO_ALG_INTERNAL, 0);
+	if (IS_ERR(tfm)) {
+		pr_err("alg: kpp: Failed to load tfm for kpp: %ld\n",
+		       PTR_ERR(tfm));
+		goto free_tmp;
+	}
+
+	req = kpp_request_alloc(tfm, GFP_KERNEL);
+	if (!req)
+		goto free_kpp;
+
+	init_completion(&result.completion);
+
+	/* Security Manager Protocol holds digits in litte-endian order
+	 * while ECC API expect big-endian data
+	 */
+	swap_digits((u64 *)private_key, (u64 *)tmp, 4);
+	p.key = (char *)tmp;
+	p.key_size = 32;
+	/* Set curve_id */
+	p.curve_id = ECC_CURVE_NIST_P256;
+	buf_len = crypto_ecdh_key_len(&p);
+	buf = kmalloc(buf_len, GFP_KERNEL);
+	if (!buf) {
+		pr_err("alg: kpp: Failed to allocate %d bytes for buf\n",
+		       buf_len);
+		goto free_req;
+	}
+	crypto_ecdh_encode_key(buf, buf_len, &p);
+
+	/* Set A private Key */
+	err = crypto_kpp_set_secret(tfm, (void *)buf, buf_len);
+	if (err)
+		goto free_all;
+
+	swap_digits((u64 *)public_key, (u64 *)tmp, 4); /* x */
+	swap_digits((u64 *)&public_key[32], (u64 *)&tmp[32], 4); /* y */
+
+	sg_init_one(&src, tmp, 64);
+	sg_init_one(&dst, secret, 32);
+	kpp_request_set_input(req, &src, 64);
+	kpp_request_set_output(req, &dst, 32);
+	kpp_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+				 ecdh_complete, &result);
+	err = crypto_kpp_compute_shared_secret(req);
+	if (err == -EINPROGRESS) {
+		wait_for_completion(&result.completion);
+		err = result.err;
+	}
+	if (err < 0) {
+		pr_err("alg: ecdh: compute shared secret failed. err %d\n",
+		       err);
+		goto free_all;
+	}
+
+	swap_digits((u64 *)secret, (u64 *)tmp, 4);
+	memcpy(secret, tmp, 32);
+
+free_all:
+	kzfree(buf);
+free_req:
+	kpp_request_free(req);
+free_kpp:
+	crypto_free_kpp(tfm);
+free_tmp:
+	kfree(tmp);
+	return (err == 0);
+}
+
+bool generate_ecdh_keys(u8 public_key[64], u8 private_key[32])
+{
+	struct crypto_kpp *tfm;
+	struct kpp_request *req;
+	struct ecdh p;
+	struct ecdh_completion result;
+	struct scatterlist dst;
+	u8 *tmp, *buf;
+	unsigned int buf_len;
+	int err = -ENOMEM;
+	const unsigned short max_tries = 16;
+	unsigned short tries = 0;
+
+	tmp = kmalloc(64, GFP_KERNEL);
+	if (!tmp)
+		return false;
+
+	tfm = crypto_alloc_kpp("ecdh", CRYPTO_ALG_INTERNAL, 0);
+	if (IS_ERR(tfm)) {
+		pr_err("alg: kpp: Failed to load tfm for kpp: %ld\n",
+		       PTR_ERR(tfm));
+		goto free_tmp;
+	}
+
+	req = kpp_request_alloc(tfm, GFP_KERNEL);
+	if (!req)
+		goto free_kpp;
+
+	init_completion(&result.completion);
+
+	/* Set curve_id */
+	p.curve_id = ECC_CURVE_NIST_P256;
+	p.key_size = 32;
+	buf_len = crypto_ecdh_key_len(&p);
+	buf = kmalloc(buf_len, GFP_KERNEL);
+	if (!buf) {
+		pr_err("alg: kpp: Failed to allocate %d bytes for buf\n",
+		       buf_len);
+		goto free_req;
+	}
+
+	do {
+		if (tries++ >= max_tries)
+			goto free_all;
+
+		/* Set private Key */
+		p.key = (char *)private_key;
+		crypto_ecdh_encode_key(buf, buf_len, &p);
+		err = crypto_kpp_set_secret(tfm, buf, buf_len);
+		if (err)
+			goto free_all;
+
+		sg_init_one(&dst, tmp, 64);
+		kpp_request_set_input(req, NULL, 0);
+		kpp_request_set_output(req, &dst, 64);
+		kpp_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+					 ecdh_complete, &result);
+
+		err = crypto_kpp_generate_public_key(req);
+
+		if (err == -EINPROGRESS) {
+			wait_for_completion(&result.completion);
+			err = result.err;
+		}
+
+		/* Private key is not valid. Regenerate */
+		if (err == -EINVAL)
+			continue;
+
+		if (err < 0)
+			goto free_all;
+		else
+			break;
+
+	} while (true);
+
+	/* Keys are handed back in little endian as expected by Security
+	 * Manager Protocol
+	 */
+	swap_digits((u64 *)tmp, (u64 *)public_key, 4); /* x */
+	swap_digits((u64 *)&tmp[32], (u64 *)&public_key[32], 4); /* y */
+	swap_digits((u64 *)private_key, (u64 *)tmp, 4);
+	memcpy(private_key, tmp, 32);
+
+free_all:
+	kzfree(buf);
+free_req:
+	kpp_request_free(req);
+free_kpp:
+	crypto_free_kpp(tfm);
+free_tmp:
+	kfree(tmp);
+	return (err == 0);
+}