kernel.git/crypto/ahash.c, branch linux-6.15.y

crypto: ahash - Disable request chaining

2025-04-12T01:33:09Z

Disable hash request chaining in case a driver that copies an ahash_request object by hand accidentally triggers chaining. Reported-by: Manorit Chawdhry Fixes: f2ffe5a9183d ("crypto: hash - Add request chaining API") Signed-off-by: Herbert Xu Tested-by: Manorit Chawdhry Signed-off-by: Herbert Xu

crypto: hash - Fix synchronous ahash chaining fallback

2025-03-21T23:25:19Z

The synchronous ahash fallback code paths are broken because the ahash_restore_req assumes there is always a state object. Fix this by removing the state from ahash_restore_req and localising it to the asynchronous completion callback. Also add a missing synchronous finish call in ahash_def_digest_finish. Fixes: f2ffe5a9183d ("crypto: hash - Add request chaining API") Fixes: 439963cdc3aa ("crypto: ahash - Add virtual address support") Signed-off-by: Herbert Xu

crypto: hash - Use nth_page instead of doing it by hand

2025-03-21T09:33:39Z

Use nth_page instead of adding n to the page pointer. Signed-off-by: Herbert Xu

crypto: hash - Fix test underflow in shash_ahash_digest

2025-03-21T09:33:38Z

The test on PAGE_SIZE - offset in shash_ahash_digest can underflow, leading to execution of the fast path even if the data cannot be mapped into a single page. Fix this by splitting the test into four cases: 1) nbytes > sg->length: More than one SG entry, slow path. 2) !IS_ENABLED(CONFIG_HIGHMEM): fast path. 3) nbytes > (unsigned int)PAGE_SIZE - offset: Two highmem pages, slow path. 4) Highmem fast path. Fixes: 5f7082ed4f48 ("crypto: hash - Export shash through hash") Signed-off-by: Herbert Xu

crypto: ahash - Set default reqsize from ahash_alg

2025-02-22T08:09:05Z

Add a reqsize field to struct ahash_alg and use it to set the default reqsize so that algorithms with a static reqsize are not forced to create an init_tfm function. Signed-off-by: Herbert Xu

crypto: ahash - Add virtual address support

2025-02-22T08:09:02Z

This patch adds virtual address support to ahash. Virtual addresses were previously only supported through shash. The user may choose to use virtual addresses with ahash by calling ahash_request_set_virt instead of ahash_request_set_crypt. The API will take care of translating this to an SG list if necessary, unless the algorithm declares that it supports chaining. Therefore in order for an ahash algorithm to support chaining, it must also support virtual addresses directly. Signed-off-by: Herbert Xu

crypto: hash - Add request chaining API

2025-02-22T08:01:53Z

This adds request chaining to the ahash interface. Request chaining allows multiple requests to be submitted in one shot. An algorithm can elect to receive chained requests by setting the flag CRYPTO_ALG_REQ_CHAIN. If this bit is not set, the API will break up chained requests and submit them one-by-one. A new err field is added to struct crypto_async_request to record the return value for each individual request. Signed-off-by: Herbert Xu

crypto: ahash - Only save callback and data in ahash_save_req

2025-02-22T07:59:59Z

As unaligned operations are supported by the underlying algorithm, ahash_save_req and ahash_restore_req can be greatly simplified to only preserve the callback and data. Signed-off-by: Herbert Xu

crypto: ahash - use str_yes_no() helper in crypto_ahash_show()

2025-02-22T07:56:03Z

Remove hard-coded strings by using the str_yes_no() helper function. Signed-off-by: Thorsten Blum Signed-off-by: Herbert Xu

crypto: ahash - make hash walk functions private to ahash.c

2025-01-04T00:53:47Z

Due to the removal of the Niagara2 SPU driver, crypto_hash_walk_first(), crypto_hash_walk_done(), crypto_hash_walk_last(), and struct crypto_hash_walk are now only used in crypto/ahash.c. Therefore, make them all private to crypto/ahash.c. I.e. un-export the two functions that were exported, make the functions static, and move the struct definition to the .c file. As part of this, move the functions to earlier in the file to avoid needing to add forward declarations. Signed-off-by: Eric Biggers Acked-by: Ard Biesheuvel Signed-off-by: Herbert Xu