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author | Lukas Wunner <lukas@wunner.de> | 2024-09-10 16:30:12 +0200 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-10-05 13:22:04 +0800 |
commit | 65c4c93caaf1a9fca2855942e338530967162d25 (patch) | |
tree | 3aba77dcafa73b58f82f79bbf0ef645a1174da5e /Documentation/crypto/api.rst | |
parent | beea320112e5763a053c77effa70a05dbbbd5e91 (diff) | |
download | lwn-65c4c93caaf1a9fca2855942e338530967162d25.tar.gz lwn-65c4c93caaf1a9fca2855942e338530967162d25.zip |
crypto: sig - Introduce sig_alg backend
Commit 6cb8815f41a9 ("crypto: sig - Add interface for sign/verify")
began a transition of asymmetric sign/verify operations from
crypto_akcipher to a new crypto_sig frontend.
Internally, the crypto_sig frontend still uses akcipher_alg as backend,
however:
"The link between sig and akcipher is meant to be temporary. The
plan is to create a new low-level API for sig and then migrate
the signature code over to that from akcipher."
https://lore.kernel.org/r/ZrG6w9wsb-iiLZIF@gondor.apana.org.au/
"having a separate alg for sig is definitely where we want to
be since there is very little that the two types actually share."
https://lore.kernel.org/r/ZrHlpz4qnre0zWJO@gondor.apana.org.au/
Take the next step of that migration and augment the crypto_sig frontend
with a sig_alg backend to which all algorithms can be moved.
During the migration, there will briefly be signature algorithms that
are still based on crypto_akcipher, whilst others are already based on
crypto_sig. Allow for that by building a fork into crypto_sig_*() API
calls (i.e. crypto_sig_maxsize() and friends) such that one of the two
backends is selected based on the transform's cra_type.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'Documentation/crypto/api.rst')
-rw-r--r-- | Documentation/crypto/api.rst | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/crypto/api.rst b/Documentation/crypto/api.rst index ff31c30561d4..8b2a90521886 100644 --- a/Documentation/crypto/api.rst +++ b/Documentation/crypto/api.rst @@ -10,4 +10,5 @@ Programming Interface api-digest api-rng api-akcipher + api-sig api-kpp |