| // SPDX-License-Identifier: GPL-2.0 |
| /* Multipath TCP cryptographic functions |
| * Copyright (c) 2017 - 2019, Intel Corporation. |
| * |
| * Note: This code is based on mptcp_ctrl.c, mptcp_ipv4.c, and |
| * mptcp_ipv6 from multipath-tcp.org, authored by: |
| * |
| * Sébastien Barré <sebastien.barre@uclouvain.be> |
| * Christoph Paasch <christoph.paasch@uclouvain.be> |
| * Jaakko Korkeaniemi <jaakko.korkeaniemi@aalto.fi> |
| * Gregory Detal <gregory.detal@uclouvain.be> |
| * Fabien Duchêne <fabien.duchene@uclouvain.be> |
| * Andreas Seelinger <Andreas.Seelinger@rwth-aachen.de> |
| * Lavkesh Lahngir <lavkesh51@gmail.com> |
| * Andreas Ripke <ripke@neclab.eu> |
| * Vlad Dogaru <vlad.dogaru@intel.com> |
| * Octavian Purdila <octavian.purdila@intel.com> |
| * John Ronan <jronan@tssg.org> |
| * Catalin Nicutar <catalin.nicutar@gmail.com> |
| * Brandon Heller <brandonh@stanford.edu> |
| */ |
| |
| #include <linux/kernel.h> |
| #include <crypto/sha2.h> |
| |
| #include "protocol.h" |
| |
| #define SHA256_DIGEST_WORDS (SHA256_DIGEST_SIZE / 4) |
| |
| void mptcp_crypto_key_sha(u64 key, u32 *token, u64 *idsn) |
| { |
| __be32 mptcp_hashed_key[SHA256_DIGEST_WORDS]; |
| __be64 input = cpu_to_be64(key); |
| |
| sha256((__force u8 *)&input, sizeof(input), (u8 *)mptcp_hashed_key); |
| |
| if (token) |
| *token = be32_to_cpu(mptcp_hashed_key[0]); |
| if (idsn) |
| *idsn = be64_to_cpu(*((__be64 *)&mptcp_hashed_key[6])); |
| } |
| |
| void mptcp_crypto_hmac_sha(u64 key1, u64 key2, u8 *msg, int len, void *hmac) |
| { |
| __be64 key[2] = { cpu_to_be64(key1), cpu_to_be64(key2) }; |
| |
| hmac_sha256_usingrawkey((const u8 *)key, sizeof(key), msg, len, hmac); |
| } |
| |
| #if IS_MODULE(CONFIG_MPTCP_KUNIT_TEST) |
| EXPORT_SYMBOL_GPL(mptcp_crypto_hmac_sha); |
| #endif |
