Eric Biggers
e05b3115e7
Convert smb2_calc_signature() to use the HMAC-SHA256 library instead of a "hmac(sha256)" crypto_shash. This is simpler and faster. With the library there's no need to allocate memory, no need to handle errors, and the HMAC-SHA256 code is accessed directly without inefficient indirect calls and other unnecessary API overhead. To make this possible, make __cifs_calc_signature() support both the HMAC-SHA256 library and crypto_shash. (crypto_shash is still needed for HMAC-MD5 and AES-CMAC. A later commit will switch HMAC-MD5 from shash to the library. I'd like to eventually do the same for AES-CMAC, but it doesn't have a library API yet. So for now, shash is still needed.) Also remove the unnecessary 'sigptr' variable. For now smb3_crypto_shash_allocate() still allocates a "hmac(sha256)" crypto_shash. It will be removed in a later commit. Reviewed-by: Stefan Metzmacher <metze@samba.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.