linux/include/crypto/internal, branch v6.8

crypto: ahash - remove support for nonzero alignmask

2023-10-27T10:04:29Z

Currently, the ahash API checks the alignment of all key and result buffers against the algorithm's declared alignmask, and for any unaligned buffers it falls back to manually aligned temporary buffers. This is virtually useless, however. First, since it does not apply to the message, its effect is much more limited than e.g. is the case for the alignmask for "skcipher". Second, the key and result buffers are given as virtual addresses and cannot (in general) be DMA'ed into, so drivers end up having to copy to/from them in software anyway. As a result it's easy to use memcpy() or the unaligned access helpers. The crypto_hash_walk_*() helper functions do use the alignmask to align the message. But with one exception those are only used for shash algorithms being exposed via the ahash API, not for native ahashes, and aligning the message is not required in this case, especially now that alignmask support has been removed from shash. The exception is the n2_core driver, which doesn't set an alignmask. In any case, no ahash algorithms actually set a nonzero alignmask anymore. Therefore, remove support for it from ahash. The benefit is that all the code to handle "misaligned" buffers in the ahash API goes away, reducing the overhead of the ahash API. This follows the same change that was made to shash. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu

crypto: shash - remove crypto_shash_ctx_aligned()

2023-10-27T10:04:28Z

crypto_shash_ctx_aligned() is no longer used, and it is useless now that shash algorithms don't support nonzero alignmasks, so remove it. Also remove crypto_tfm_ctx_aligned() which was only called by crypto_shash_ctx_aligned(). It's unlikely to be useful again, since it seems inappropriate to use cra_alignmask to represent alignment for the tfm context when it already means alignment for inputs/outputs. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu

crypto: skcipher - Remove obsolete skcipher_alg helpers

2023-10-13T10:27:27Z

As skcipher spawn users can no longer assume the spawn is of type struct skcipher_alg, these helpers are no longer used. Remove them. Signed-off-by: Herbert Xu

crypto: skcipher - Add crypto_spawn_skcipher_alg_common

2023-10-13T10:27:26Z

As skcipher spawns can be of two different types (skcipher vs. lskcipher), only the common fields can be accessed. Add a helper to return the common algorithm object. Signed-off-by: Herbert Xu

crypto: skcipher - Add lskcipher

2023-09-20T05:15:29Z

Add a new API type lskcipher designed for taking straight kernel pointers instead of SG lists. Its relationship to skcipher will be analogous to that between shash and ahash. Signed-off-by: Herbert Xu

crypto: engine - Move struct crypto_engine into internal/engine.h

2023-08-18T09:01:10Z

Most drivers should not access the internal details of struct crypto_engine. Move it into the internal header file. Signed-off-by: Herbert Xu

crypto: engine - Create internal/engine.h

2023-08-18T09:01:10Z

Create crypto/internal/engine.h to house details that should not be used by drivers. It is empty for the time being. Signed-off-by: Herbert Xu

crypto: sig - Add interface for sign/verify

2023-06-23T08:15:36Z

Split out the sign/verify functionality from the existing akcipher interface. Most algorithms in akcipher either support encryption and decryption, or signing and verify. Only one supports both. As a signature algorithm may not support encryption at all, these two should be spearated. For now sig is simply a wrapper around akcipher as all algorithms remain unchanged. This is a first step and allows users to start allocating sig instead of akcipher. Signed-off-by: Herbert Xu

crypto: cipher - Add crypto_clone_cipher

2023-05-24T10:12:33Z

Allow simple ciphers to be cloned, if they don't have a cra_init function. This basically rules out those ciphers that require a fallback. In future simple ciphers will be eliminated, and replaced with a linear skcipher interface. When that happens this restriction will disappear. Signed-off-by: Herbert Xu Acked-by: Ard Biesheuvel Signed-off-by: Herbert Xu

crypto: hash - Make crypto_ahash_alg helper available

2023-05-12T10:48:01Z

Move the crypto_ahash_alg helper into include/crypto/internal so that drivers can use it. Signed-off-by: Herbert Xu