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author | Herbert Xu <herbert@gondor.apana.org.au> | 2020-08-18 18:25:34 +1000 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-08-28 16:58:28 +1000 |
commit | e73d340db6448013ac219d105654d2b9868a8dd2 (patch) | |
tree | 2b14a7315bba9263ac5ff9f92528b86436318afb | |
parent | 6779d0e6b0fe193ab3010ea201782ca6f75a3862 (diff) | |
download | linux-e73d340db6448013ac219d105654d2b9868a8dd2.tar.bz2 |
crypto: ahash - Add init_tfm/exit_tfm
This patch adds the type-safe init_tfm/exit_tfm functions to the
ahash interface. This is meant to replace the unsafe cra_init and
cra_exit interface.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r-- | crypto/ahash.c | 13 | ||||
-rw-r--r-- | include/crypto/hash.h | 13 |
2 files changed, 25 insertions, 1 deletions
diff --git a/crypto/ahash.c b/crypto/ahash.c index d84ad925dfc9..c2ca631a111f 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -444,6 +444,14 @@ static int ahash_def_finup(struct ahash_request *req) return ahash_def_finup_finish1(req, err); } +static void crypto_ahash_exit_tfm(struct crypto_tfm *tfm) +{ + struct crypto_ahash *hash = __crypto_ahash_cast(tfm); + struct ahash_alg *alg = crypto_ahash_alg(hash); + + alg->exit_tfm(hash); +} + static int crypto_ahash_init_tfm(struct crypto_tfm *tfm) { struct crypto_ahash *hash = __crypto_ahash_cast(tfm); @@ -467,7 +475,10 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm) ahash_set_needkey(hash); } - return 0; + if (alg->exit_tfm) + tfm->exit = crypto_ahash_exit_tfm; + + return alg->init_tfm ? alg->init_tfm(hash) : 0; } static unsigned int crypto_ahash_extsize(struct crypto_alg *alg) diff --git a/include/crypto/hash.h b/include/crypto/hash.h index 0d1b403888c9..a2563a59fadd 100644 --- a/include/crypto/hash.h +++ b/include/crypto/hash.h @@ -123,6 +123,17 @@ struct ahash_request { * data so the transformation can continue from this point onward. No * data processing happens at this point. Driver must not use * req->result. + * @init_tfm: Initialize the cryptographic transformation object. + * This function is called only once at the instantiation + * time, right after the transformation context was + * allocated. In case the cryptographic hardware has + * some special requirements which need to be handled + * by software, this function shall check for the precise + * requirement of the transformation and put any software + * fallbacks in place. + * @exit_tfm: Deinitialize the cryptographic transformation object. + * This is a counterpart to @init_tfm, used to remove + * various changes set in @init_tfm. * @halg: see struct hash_alg_common */ struct ahash_alg { @@ -135,6 +146,8 @@ struct ahash_alg { int (*import)(struct ahash_request *req, const void *in); int (*setkey)(struct crypto_ahash *tfm, const u8 *key, unsigned int keylen); + int (*init_tfm)(struct crypto_ahash *tfm); + void (*exit_tfm)(struct crypto_ahash *tfm); struct hash_alg_common halg; }; |