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d829e9c411
Convert kTLS over to make use of sk_msg interface for plaintext and encrypted scattergather data, so it reuses all the sk_msg helpers and data structure which later on in a second step enables to glue this to BPF. This also allows to remove quite a bit of open coded helpers which are covered by the sk_msg API. Recent changes in kTLs80ece6a03a("tls: Remove redundant vars from tls record structure") and4e6d47206c("tls: Add support for inplace records encryption") changed the data path handling a bit; while we've kept the latter optimization intact, we had to undo the former change to better fit the sk_msg model, hence the sg_aead_in and sg_aead_out have been brought back and are linked into the sk_msg sgs. Now the kTLS record contains a msg_plaintext and msg_encrypted sk_msg each. In the original code, the zerocopy_from_iter() has been used out of TX but also RX path. For the strparser skb-based RX path, we've left the zerocopy_from_iter() in decrypt_internal() mostly untouched, meaning it has been moved into tls_setup_from_iter() with charging logic removed (as not used from RX). Given RX path is not based on sk_msg objects, we haven't pursued setting up a dummy sk_msg to call into sk_msg_zerocopy_from_iter(), but it could be an option to prusue in a later step. Joint work with John. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
27 lines
564 B
Text
27 lines
564 B
Text
#
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# TLS configuration
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#
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config TLS
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tristate "Transport Layer Security support"
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depends on INET
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select CRYPTO
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select CRYPTO_AES
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select CRYPTO_GCM
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select STREAM_PARSER
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select NET_SOCK_MSG
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default n
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---help---
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Enable kernel support for TLS protocol. This allows symmetric
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encryption handling of the TLS protocol to be done in-kernel.
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If unsure, say N.
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config TLS_DEVICE
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bool "Transport Layer Security HW offload"
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depends on TLS
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select SOCK_VALIDATE_XMIT
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default n
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help
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Enable kernel support for HW offload of the TLS protocol.
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If unsure, say N.
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