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crypto: ahash - Add core export and import

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Add crypto_ahash_export_core and crypto_ahash_import_core.  For
now they only differ from the normal export/import functions when
going through shash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2025-05-04 21:33:21 +08:00
parent fd66f2ab09
commit 1052671ca1
2 changed files with 48 additions and 1 deletions
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25
crypto/ahash.c
View File

@@ -698,6 +698,16 @@ static int ahash_def_finup(struct ahash_request *req)
return ahash_def_finup_finish1(req, err);
}
int crypto_ahash_export_core(struct ahash_request *req, void *out)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
if (likely(tfm->using_shash))
return crypto_shash_export_core(ahash_request_ctx(req), out);
return crypto_ahash_alg(tfm)->export(req, out);
}
EXPORT_SYMBOL_GPL(crypto_ahash_export_core);
int crypto_ahash_export(struct ahash_request *req, void *out)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
@@ -708,6 +718,19 @@ int crypto_ahash_export(struct ahash_request *req, void *out)
}
EXPORT_SYMBOL_GPL(crypto_ahash_export);
int crypto_ahash_import_core(struct ahash_request *req, const void *in)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
if (likely(tfm->using_shash))
return crypto_shash_import_core(prepare_shash_desc(req, tfm),
in);
if (crypto_ahash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY)
return -ENOKEY;
return crypto_ahash_alg(tfm)->import(req, in);
}
EXPORT_SYMBOL_GPL(crypto_ahash_import_core);
int crypto_ahash_import(struct ahash_request *req, const void *in)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
@@ -716,7 +739,7 @@ int crypto_ahash_import(struct ahash_request *req, const void *in)
return crypto_shash_import(prepare_shash_desc(req, tfm), in);
if (crypto_ahash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY)
return -ENOKEY;
return crypto_ahash_alg(tfm)->import(req, in);
return crypto_ahash_import_core(req, in);
}
EXPORT_SYMBOL_GPL(crypto_ahash_import);

24
include/crypto/hash.h
View File

@@ -506,6 +506,18 @@ int crypto_ahash_digest(struct ahash_request *req);
*/
int crypto_ahash_export(struct ahash_request *req, void *out);
/**
* crypto_ahash_export_core() - extract core state for message digest
* @req: reference to the ahash_request handle whose state is exported
* @out: output buffer of sufficient size that can hold the hash state
*
* Export the hash state without the partial block buffer.
*
* Context: Softirq or process context.
* Return: 0 if the export creation was successful; < 0 if an error occurred
*/
int crypto_ahash_export_core(struct ahash_request *req, void *out);
/**
* crypto_ahash_import() - import message digest state
* @req: reference to ahash_request handle the state is imported into
@@ -519,6 +531,18 @@ int crypto_ahash_export(struct ahash_request *req, void *out);
*/
int crypto_ahash_import(struct ahash_request *req, const void *in);
/**
* crypto_ahash_import_core() - import core state
* @req: reference to ahash_request handle the state is imported into
* @in: buffer holding the state
*
* Import the hash state without the partial block buffer.
*
* Context: Softirq or process context.
* Return: 0 if the import was successful; < 0 if an error occurred
*/
int crypto_ahash_import_core(struct ahash_request *req, const void *in);
/**
* crypto_ahash_init() - (re)initialize message digest handle
* @req: ahash_request handle that already is initialized with all necessary