mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
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Eric Biggers
2d5be5629c
Now that there are easy-to-use HMAC-SHA256 library functions, use these in net/mptcp/crypto.c instead of open-coding the HMAC algorithm. Remove the WARN_ON_ONCE() for messages longer than SHA256_DIGEST_SIZE. The new implementation handles all message lengths correctly. The mptcp-crypto KUnit test still passes after this change. Signed-off-by: Eric Biggers <[email protected]> Reviewed-by: Matthieu Baerts (NGI0) <[email protected]> Signed-off-by: Matthieu Baerts (NGI0) <[email protected]> Link: https://patch.msgid.link/20250902-net-next-mptcp-misc-feat-6-18-v2-1-fa02bb3188b1@kernel.org Signed-off-by: Jakub Kicinski <[email protected]>
53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Multipath TCP cryptographic functions
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* Copyright (c) 2017 - 2019, Intel Corporation.
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*
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* Note: This code is based on mptcp_ctrl.c, mptcp_ipv4.c, and
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* mptcp_ipv6 from multipath-tcp.org, authored by:
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*
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* Sébastien Barré <[email protected]>
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* Christoph Paasch <[email protected]>
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* Jaakko Korkeaniemi <[email protected]>
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* Gregory Detal <[email protected]>
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* Fabien Duchêne <[email protected]>
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* Andreas Seelinger <[email protected]>
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* Lavkesh Lahngir <[email protected]>
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* Andreas Ripke <[email protected]>
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* Vlad Dogaru <[email protected]>
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* Octavian Purdila <[email protected]>
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* John Ronan <[email protected]>
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* Catalin Nicutar <[email protected]>
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* Brandon Heller <[email protected]>
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*/
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#include <linux/kernel.h>
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#include <crypto/sha2.h>
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#include "protocol.h"
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#define SHA256_DIGEST_WORDS (SHA256_DIGEST_SIZE / 4)
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void mptcp_crypto_key_sha(u64 key, u32 *token, u64 *idsn)
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{
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__be32 mptcp_hashed_key[SHA256_DIGEST_WORDS];
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__be64 input = cpu_to_be64(key);
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sha256((__force u8 *)&input, sizeof(input), (u8 *)mptcp_hashed_key);
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if (token)
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*token = be32_to_cpu(mptcp_hashed_key[0]);
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if (idsn)
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*idsn = be64_to_cpu(*((__be64 *)&mptcp_hashed_key[6]));
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}
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void mptcp_crypto_hmac_sha(u64 key1, u64 key2, u8 *msg, int len, void *hmac)
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{
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__be64 key[2] = { cpu_to_be64(key1), cpu_to_be64(key2) };
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hmac_sha256_usingrawkey((const u8 *)key, sizeof(key), msg, len, hmac);
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}
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#if IS_MODULE(CONFIG_MPTCP_KUNIT_TEST)
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EXPORT_SYMBOL_GPL(mptcp_crypto_hmac_sha);
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#endif
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