diff options
| -rw-r--r-- | crypto/aead.c | 6 | ||||
| -rw-r--r-- | include/crypto/aead.h | 12 | ||||
| -rw-r--r-- | include/crypto/internal/aead.h | 21 |
3 files changed, 33 insertions, 6 deletions
diff --git a/crypto/aead.c b/crypto/aead.c index 9b18a1e40d6a..b155cbc3a0dd 100644 --- a/crypto/aead.c +++ b/crypto/aead.c @@ -346,9 +346,13 @@ static int aead_prepare_alg(struct aead_alg *alg) { struct crypto_alg *base = &alg->base; - if (max(alg->maxauthsize, alg->ivsize) > PAGE_SIZE / 8) + if (max3(alg->maxauthsize, alg->ivsize, alg->chunksize) > + PAGE_SIZE / 8) return -EINVAL; + if (!alg->chunksize) + alg->chunksize = base->cra_blocksize; + base->cra_type = &crypto_aead_type; base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; base->cra_flags |= CRYPTO_ALG_TYPE_AEAD; diff --git a/include/crypto/aead.h b/include/crypto/aead.h index 75174f80a106..12f84327ca36 100644 --- a/include/crypto/aead.h +++ b/include/crypto/aead.h @@ -112,11 +112,12 @@ struct aead_request { * supplied during the decryption operation. This function is also * responsible for checking the authentication tag size for * validity. - * @setkey: see struct ablkcipher_alg - * @encrypt: see struct ablkcipher_alg - * @decrypt: see struct ablkcipher_alg - * @geniv: see struct ablkcipher_alg - * @ivsize: see struct ablkcipher_alg + * @setkey: see struct skcipher_alg + * @encrypt: see struct skcipher_alg + * @decrypt: see struct skcipher_alg + * @geniv: see struct skcipher_alg + * @ivsize: see struct skcipher_alg + * @chunksize: see struct skcipher_alg * @init: Initialize the cryptographic transformation object. This function * is used to initialize the cryptographic transformation object. * This function is called only once at the instantiation time, right @@ -145,6 +146,7 @@ struct aead_alg { unsigned int ivsize; unsigned int maxauthsize; + unsigned int chunksize; struct crypto_alg base; }; diff --git a/include/crypto/internal/aead.h b/include/crypto/internal/aead.h index da3864991d4c..6ad8e31d3868 100644 --- a/include/crypto/internal/aead.h +++ b/include/crypto/internal/aead.h @@ -159,6 +159,27 @@ static inline struct aead_request *aead_get_backlog(struct aead_queue *queue) return req ? container_of(req, struct aead_request, base) : NULL; } +static inline unsigned int crypto_aead_alg_chunksize(struct aead_alg *alg) +{ + return alg->chunksize; +} + +/** + * crypto_aead_chunksize() - obtain chunk size + * @tfm: cipher handle + * + * The block size is set to one for ciphers such as CCM. However, + * you still need to provide incremental updates in multiples of + * the underlying block size as the IV does not have sub-block + * granularity. This is known in this API as the chunk size. + * + * Return: chunk size in bytes + */ +static inline unsigned int crypto_aead_chunksize(struct crypto_aead *tfm) +{ + return crypto_aead_alg_chunksize(crypto_aead_alg(tfm)); +} + int crypto_register_aead(struct aead_alg *alg); void crypto_unregister_aead(struct aead_alg *alg); int crypto_register_aeads(struct aead_alg *algs, int count); |