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Crypto algorithms must produce the same output for the same input regardless of data layout, i.e. how the src and dst scatterlists are divided into chunks and how each chunk is aligned. Request flags such as CRYPTO_TFM_REQ_MAY_SLEEP must not affect the result either. However, testing of this currently has many gaps. For example, individual algorithms are responsible for providing their own chunked test vectors. But many don't bother to do this or test only one or two cases, providing poor test coverage. Also, other things such as misaligned IVs and CRYPTO_TFM_REQ_MAY_SLEEP are never tested at all. Test code is also duplicated between the chunked and non-chunked cases, making it difficult to make other improvements. To improve the situation, this patch series basically moves the chunk descriptions into the testmgr itself so that they are shared by all algorithms. However, it's done in an extensible way via a new struct 'testvec_config', which describes not just the scaled chunk lengths but also all other aspects of the crypto operation besides the data itself such as the buffer alignments, the request flags, whether the operation is in-place or not, the IV alignment, and for hash algorithms when to do each update() and when to use finup() vs. final() vs. digest(). Then, this patch series makes skcipher, aead, and hash algorithms be tested against a list of default testvec_configs, replacing the current test code. This improves overall test coverage, without reducing test performance too much. Note that the test vectors themselves are not changed, except for removing the chunk lists. This series also adds randomized fuzz tests, enabled by a new kconfig option intended for developer use only, where skcipher, aead, and hash algorithms are tested against many randomly generated testvec_configs. This provides much more comprehensive test coverage. These improved tests have already exposed many bugs. To start it off, this initial patch adds the testvec_config and various helper functions that will be used by the skcipher, aead, and hash test code that will be converted to use the new testvec_config framework. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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 Restructured Text 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.