lib: Move SipHash into lib/crypto/

The addition of SipHash to lib/ predated the existence of the
lib/crypto/ directory. Since SipHash is a cryptographic algorithm, move
it from the top-level lib/ d

lib: Move SipHash into lib/crypto/

The addition of SipHash to lib/ predated the existence of the
lib/crypto/ directory. Since SipHash is a cryptographic algorithm, move
it from the top-level lib/ directory to lib/crypto/.

(This does mean HalfSipHash comes with it too, as it's in the same
files. But lib/crypto/ still seems like the proper place for both.)

Specifically:

- Move both siphash.c and siphash_kunit.c. Keep the header
<linux/siphash.h> as-is for now.

- Drop the dedicated MAINTAINERS entry for SipHash, as per the
suggestion from Jason
(https://lore.kernel.org/r/asB7QVFMlgKgbje2@zx2c4.com/). The C files
now just fold up to the "CRYPTO LIBRARY" entry. Add the header
explicitly, as it otherwise would be left unmaintained.

- Move the kconfig option that controls the KUnit test. Put
"CRYPTO_LIB" in its name and update the prompt and help text to make
it consistent with the other crypto library test options.

- Enable the KUnit test in lib/crypto/.kunitconfig.

- Link to siphash.rst from the appropriate place in libcrypto-hash.rst.

- Use obj-y instead of lib-y, for consistency with the fact that
currently lib/crypto/ doesn't use kbuild's support for library file
goals. We could keep it as lib-y, but virtually every kernel needs
SipHash support anyway (with vsprintf, printk, IPv4, IPv6, etc.
depending on it) so there is no practical difference in this case.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Jason A. Donenfeld <Jason@zx2c4.com>
Link: https://patch.msgid.link/20261003162827.155527-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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lib/crypto: tests: Add KUnit test suite for AES-GCM

Add a KUnit test suite for the AES-GCM library API.

It consists of:

- All the shared test cases from aead-test-template.h. These include
exte

lib/crypto: tests: Add KUnit test suite for AES-GCM

Add a KUnit test suite for the AES-GCM library API.

It consists of:

- All the shared test cases from aead-test-template.h. These include
extensive consistency tests, a "Monte-Carlo test", and a benchmark.

- Tests against hardcoded AES-GCM test vectors from external sources.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802233005.161467-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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lib/crypto: tests: Add KUnit test suite for AES-CCM

Add a KUnit test suite for the AES-CCM library API.

It consists of:

- All the shared test cases from aead-test-template.h. These include
exte

lib/crypto: tests: Add KUnit test suite for AES-CCM

Add a KUnit test suite for the AES-CCM library API.

It consists of:

- All the shared test cases from aead-test-template.h. These include
extensive consistency tests, a "Monte-Carlo test", and a benchmark.

- Tests against hardcoded AES-CCM test vectors from external sources.

- Tests for CCM-specific message length validation.

To generate the expected aes_ccm_monte_carlo_checksum[] value, add a
script gen-aead-testvecs.py which computes it using python-cryptography.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802233005.161467-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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lib/crypto: tests: Migrate ChaCha20Poly1305 self-test to KUnit

Move the ChaCha20Poly1305 test from an ad-hoc self-test to a KUnit test.

Keep the same test logic for now, just translated to KUnit.

lib/crypto: tests: Migrate ChaCha20Poly1305 self-test to KUnit

Move the ChaCha20Poly1305 test from an ad-hoc self-test to a KUnit test.

Keep the same test logic for now, just translated to KUnit.

Moving to KUnit has multiple benefits, such as:

- Consistency with the rest of the lib/crypto/ tests.

- Kernel developers familiar with KUnit, which is used kernel-wide, can
quickly understand the test and how to enable and run it.

- The test will be automatically run by anyone using
lib/crypto/.kunitconfig or KUnit's all_tests.config.

- Results are reported using the standard KUnit mechanism.

- It eliminates one of the few remaining back-references to crypto/ from
lib/crypto/, specifically a reference to CONFIG_CRYPTO_SELFTESTS.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260327224229.137532-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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lib/crypto: tests: Add KUnit tests for SM3

Add a KUnit test suite for the SM3 library. It closely mirrors the test
suites for the other cryptographic hash functions. The actual test and
benchmark

lib/crypto: tests: Add KUnit tests for SM3

Add a KUnit test suite for the SM3 library. It closely mirrors the test
suites for the other cryptographic hash functions. The actual test and
benchmark logic is already in hash-test-template.h; this just wires it
up for SM3 in the usual way.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260321040935.410034-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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lib/crypto: tests: Add KUnit tests for GHASH

Add a KUnit test suite for the GHASH library functions.

It closely mirrors the POLYVAL test suite.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: htt

lib/crypto: tests: Add KUnit tests for GHASH

Add a KUnit test suite for the GHASH library functions.

It closely mirrors the POLYVAL test suite.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260319061723.1140720-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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lib/crypto: tests: Introduce CRYPTO_LIB_ENABLE_ALL_FOR_KUNIT

For kunit.py to run all the crypto library tests when passed the
--alltests option, tools/testing/kunit/configs/all_tests.config needs to

lib/crypto: tests: Introduce CRYPTO_LIB_ENABLE_ALL_FOR_KUNIT

For kunit.py to run all the crypto library tests when passed the
--alltests option, tools/testing/kunit/configs/all_tests.config needs to
enable options that satisfy the test dependencies.

This is the same as what lib/crypto/.kunitconfig already does.
However, the strategy that lib/crypto/.kunitconfig currently uses to
select all the hidden library options isn't going to scale up well when
it needs to be repeated in two places.

Instead let's go ahead and introduce an option
CRYPTO_LIB_ENABLE_ALL_FOR_KUNIT that depends on KUNIT and selects all
the crypto library options that have corresponding KUnit tests.

Update lib/crypto/.kunitconfig to use this option.

Link: https://lore.kernel.org/r/20260314035927.51351-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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lib/crypto: tests: Add KUnit tests for CBC-based MACs

Add a KUnit test suite for the AES-CMAC, AES-XCBC-MAC, and AES-CBC-MAC
library functions.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: h

lib/crypto: tests: Add KUnit tests for CBC-based MACs

Add a KUnit test suite for the AES-CMAC, AES-XCBC-MAC, and AES-CBC-MAC
library functions.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260218213501.136844-7-ebiggers@kernel.org
Link: https://lore.kernel.org/r/20260306001917.24105-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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lib/crypto: tests: Add a .kunitconfig file

Add a .kunitconfig file to the lib/crypto/ directory so that the crypto
library tests can be run more easily using kunit.py. Example with UML:

tools/

lib/crypto: tests: Add a .kunitconfig file

Add a .kunitconfig file to the lib/crypto/ directory so that the crypto
library tests can be run more easily using kunit.py. Example with UML:

tools/testing/kunit/kunit.py run --kunitconfig=lib/crypto

Example with QEMU:

tools/testing/kunit/kunit.py run --kunitconfig=lib/crypto --arch=arm64 --make_options LLVM=1

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260301040140.490310-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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