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d6793ff974
Unlike the rsa driver, which separates signature decoding and signature verification into two steps, the ecdsa driver does both in one. This restricts users to the one signature format currently supported (X9.62) and prevents addition of others such as P1363, which is needed by the forthcoming SPDM library (Security Protocol and Data Model) for PCI device authentication. Per Herbert's suggestion, change ecdsa to use a "raw" signature encoding and then implement X9.62 and P1363 as templates which convert their respective encodings to the raw one. One may then specify "x962(ecdsa-nist-XXX)" or "p1363(ecdsa-nist-XXX)" to pick the encoding. The present commit moves X9.62 decoding to a template. A separate commit is going to introduce another template for P1363 decoding. The ecdsa driver internally represents a signature as two u64 arrays of size ECC_MAX_BYTES. This appears to be the most natural choice for the raw format as it can directly be used for verification without having to further decode signature data or copy it around. Repurpose all the existing test vectors for "x962(ecdsa-nist-XXX)" and create a duplicate of them to test the raw encoding. Link: https://lore.kernel.org/all/ZoHXyGwRzVvYkcTP@gondor.apana.org.au/ Signed-off-by: Lukas Wunner <lukas@wunner.de> Tested-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
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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.