kernel/linux.git/include/linux/crypto.h, branch v6.19.11

crypto: ahash - Add support for drivers with no fallback

2025-06-11T03:06:06+00:00

Some drivers cannot have a fallback, e.g., because the key is held in hardware. Allow these to be used with ahash by adding the bit CRYPTO_ALG_NO_FALLBACK. Signed-off-by: Herbert Xu Tested-by: Harald Freudenberger

crypto: api - Rename CRYPTO_ALG_REQ_CHAIN to CRYPTO_ALG_REQ_VIRT

2025-05-05T10:20:45+00:00

As chaining has been removed, all that remains of REQ_CHAIN is just virtual address support. Rename it before the reintroduction of batching creates confusion. Signed-off-by: Herbert Xu

crypto: api - Add crypto_stack_request_init and initialise flags fully

2025-04-28T11:45:26+00:00

Add a helper to initialise crypto stack requests and use it for ahash and acomp. Make sure that the flags field is initialised fully in the helper to silence false-positive warnings from the compiler. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202504250751.mdy28Ibr-lkp@intel.com/ Signed-off-by: Herbert Xu

crypto: api - Add crypto_request_clone and fb

2025-04-28T11:40:54+00:00

Add a helper to clone crypto requests and eliminate code duplication. Use kmemdup in the helper. Also add an fb field to crypto_tfm. This also happens to fix the existing implementations which were buggy. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202504230118.1CxUaUoX-lkp@intel.com/ Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202504230004.c7mrY0C6-lkp@intel.com/ Signed-off-by: Herbert Xu

crypto: shash - Handle partial blocks in API

2025-04-23T03:33:46+00:00

Provide an option to handle the partial blocks in the shash API. Almost every hash algorithm has a block size and are only able to hash partial blocks on finalisation. Rather than duplicating the partial block handling many times, add this functionality to the shash API. It is optional (e.g., hmac would never need this by relying on the partial block handling of the underlying hash), and to enable it set the bit CRYPTO_AHASH_ALG_BLOCK_ONLY. The export format is always that of the underlying hash export, plus the partial block buffer, followed by a single-byte for the partial block length. Set the bit CRYPTO_AHASH_ALG_FINAL_NONZERO to withhold an extra byte in the partial block. This will come in handy when this is extended to ahash where hardware often can't deal with a zero-length final. It will also be used for algorithms requiring an extra block for finalisation (e.g., cmac). As an optimisation, set the bit CRYPTO_AHASH_ALG_FINUP_MAX if the algorithm wishes to get as much data as possible instead of just the last partial block. The descriptor will be zeroed after finalisation. Signed-off-by: Herbert Xu

crypto: api - Add support for duplicating algorithms before registration

2025-04-16T07:36:24+00:00

If the bit CRYPTO_ALG_DUP_FIRST is set, an algorithm will be duplicated by kmemdup before registration. This is inteded for hardware-based algorithms that may be unplugged at will. Do not use this if the algorithm data structure is embedded in a bigger data structure. Perform the duplication in the driver instead. Signed-off-by: Herbert Xu

crypto: api - Add reqsize to crypto_alg

2025-04-16T07:16:21+00:00

Add a reqsize field to crypto_alg with the intention of replacing the type-specific reqsize field currently used by ahash and acomp. Signed-off-by: Herbert Xu

crypto: api - Mark cra_init/cra_exit as deprecated

2025-04-16T07:16:21+00:00

These functions have been obsoleted by the type-specific init/exit functions. Signed-off-by: Herbert Xu

crypto: api - Add helpers to manage request flags

2025-04-16T07:16:20+00:00

Add helpers so that the ON_STACK request flag management is not duplicated all over the place. Signed-off-by: Herbert Xu

crypto: ahash - Remove request chaining

2025-04-16T07:16:20+00:00

Request chaining requires the user to do too much book keeping. Remove it from ahash. Signed-off-by: Herbert Xu