From: Tyler Hicks Subject: Re: [v2 PATCH 9/26] eCryptfs: Use skcipher and shash Date: Fri, 29 Jan 2016 11:22:30 -0600 Message-ID: <20160129172229.GA4818@boyd> References: <201601250207.1gdHywwq%fengguang.wu@intel.com> <20160125022933.GA4345@gondor.apana.org.au> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="huq684BweRXVnRxX" Cc: Julia Lawall , Linux Crypto Mailing List , Linux Kernel Mailing List , netdev@vger.kernel.org, devel@driverdev.osuosl.org, dm-devel@redhat.com, linux-wireless@vger.kernel.org, linux-cifs@vger.kernel.org, ecryptfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nfs@vger.kernel.org, keyrings@vger.kernel.org, linux-bluetooth@vger.kernel.org, ceph-devel@vger.kernel.org, linux-wpan@vger.kernel.org, linux-afs@lists.infradead.org, drbd-dev@lists.linbit.com, open-iscsi@googlegroups.com, kbuild-all@01.org To: Herbert Xu Return-path: Content-Disposition: inline In-Reply-To: <20160125022933.GA4345@gondor.apana.org.au> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org --huq684BweRXVnRxX Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2016-01-25 10:29:33, Herbert Xu wrote: > On Sun, Jan 24, 2016 at 07:10:50PM +0100, Julia Lawall wrote: > > Maybe the goto on line 1726 needs a preceding mutex_unlock? >=20 > Good catch! Thanks. >=20 > ---8<--- > This patch replaces uses of ablkcipher and blkcipher with skcipher, > and the long obsolete hash interface with shash. >=20 > Signed-off-by: Herbert Xu Acked-by: Tyler Hicks I have no problem with you taking this through the cryptodev tree. Thanks! Tyler >=20 > diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c > index 80d6901..11255cb 100644 > --- a/fs/ecryptfs/crypto.c > +++ b/fs/ecryptfs/crypto.c > @@ -23,6 +23,8 @@ > * 02111-1307, USA. > */ > =20 > +#include > +#include > #include > #include > #include > @@ -30,7 +32,6 @@ > #include > #include > #include > -#include > #include > #include > #include > @@ -74,6 +75,19 @@ void ecryptfs_from_hex(char *dst, char *src, int dst_s= ize) > } > } > =20 > +static int ecryptfs_hash_digest(struct crypto_shash *tfm, > + char *src, int len, char *dst) > +{ > + SHASH_DESC_ON_STACK(desc, tfm); > + int err; > + > + desc->tfm =3D tfm; > + desc->flags =3D CRYPTO_TFM_REQ_MAY_SLEEP; > + err =3D crypto_shash_digest(desc, src, len, dst); > + shash_desc_zero(desc); > + return err; > +} > + > /** > * ecryptfs_calculate_md5 - calculates the md5 of @src > * @dst: Pointer to 16 bytes of allocated memory > @@ -88,45 +102,26 @@ static int ecryptfs_calculate_md5(char *dst, > struct ecryptfs_crypt_stat *crypt_stat, > char *src, int len) > { > - struct scatterlist sg; > - struct hash_desc desc =3D { > - .tfm =3D crypt_stat->hash_tfm, > - .flags =3D CRYPTO_TFM_REQ_MAY_SLEEP > - }; > + struct crypto_shash *tfm; > int rc =3D 0; > =20 > mutex_lock(&crypt_stat->cs_hash_tfm_mutex); > - sg_init_one(&sg, (u8 *)src, len); > - if (!desc.tfm) { > - desc.tfm =3D crypto_alloc_hash(ECRYPTFS_DEFAULT_HASH, 0, > - CRYPTO_ALG_ASYNC); > - if (IS_ERR(desc.tfm)) { > - rc =3D PTR_ERR(desc.tfm); > + tfm =3D crypt_stat->hash_tfm; > + if (!tfm) { > + tfm =3D crypto_alloc_shash(ECRYPTFS_DEFAULT_HASH, 0, 0); > + if (IS_ERR(tfm)) { > + rc =3D PTR_ERR(tfm); > ecryptfs_printk(KERN_ERR, "Error attempting to " > "allocate crypto context; rc =3D [%d]\n", > rc); > goto out; > } > - crypt_stat->hash_tfm =3D desc.tfm; > - } > - rc =3D crypto_hash_init(&desc); > - if (rc) { > - printk(KERN_ERR > - "%s: Error initializing crypto hash; rc =3D [%d]\n", > - __func__, rc); > - goto out; > + crypt_stat->hash_tfm =3D tfm; > } > - rc =3D crypto_hash_update(&desc, &sg, len); > + rc =3D ecryptfs_hash_digest(tfm, src, len, dst); > if (rc) { > printk(KERN_ERR > - "%s: Error updating crypto hash; rc =3D [%d]\n", > - __func__, rc); > - goto out; > - } > - rc =3D crypto_hash_final(&desc, dst); > - if (rc) { > - printk(KERN_ERR > - "%s: Error finalizing crypto hash; rc =3D [%d]\n", > + "%s: Error computing crypto hash; rc =3D [%d]\n", > __func__, rc); > goto out; > } > @@ -234,10 +229,8 @@ void ecryptfs_destroy_crypt_stat(struct ecryptfs_cry= pt_stat *crypt_stat) > { > struct ecryptfs_key_sig *key_sig, *key_sig_tmp; > =20 > - if (crypt_stat->tfm) > - crypto_free_ablkcipher(crypt_stat->tfm); > - if (crypt_stat->hash_tfm) > - crypto_free_hash(crypt_stat->hash_tfm); > + crypto_free_skcipher(crypt_stat->tfm); > + crypto_free_shash(crypt_stat->hash_tfm); > list_for_each_entry_safe(key_sig, key_sig_tmp, > &crypt_stat->keysig_list, crypt_stat_list) { > list_del(&key_sig->crypt_stat_list); > @@ -342,7 +335,7 @@ static int crypt_scatterlist(struct ecryptfs_crypt_st= at *crypt_stat, > struct scatterlist *src_sg, int size, > unsigned char *iv, int op) > { > - struct ablkcipher_request *req =3D NULL; > + struct skcipher_request *req =3D NULL; > struct extent_crypt_result ecr; > int rc =3D 0; > =20 > @@ -358,20 +351,20 @@ static int crypt_scatterlist(struct ecryptfs_crypt_= stat *crypt_stat, > init_completion(&ecr.completion); > =20 > mutex_lock(&crypt_stat->cs_tfm_mutex); > - req =3D ablkcipher_request_alloc(crypt_stat->tfm, GFP_NOFS); > + req =3D skcipher_request_alloc(crypt_stat->tfm, GFP_NOFS); > if (!req) { > mutex_unlock(&crypt_stat->cs_tfm_mutex); > rc =3D -ENOMEM; > goto out; > } > =20 > - ablkcipher_request_set_callback(req, > + skcipher_request_set_callback(req, > CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, > extent_crypt_complete, &ecr); > /* Consider doing this once, when the file is opened */ > if (!(crypt_stat->flags & ECRYPTFS_KEY_SET)) { > - rc =3D crypto_ablkcipher_setkey(crypt_stat->tfm, crypt_stat->key, > - crypt_stat->key_size); > + rc =3D crypto_skcipher_setkey(crypt_stat->tfm, crypt_stat->key, > + crypt_stat->key_size); > if (rc) { > ecryptfs_printk(KERN_ERR, > "Error setting key; rc =3D [%d]\n", > @@ -383,9 +376,9 @@ static int crypt_scatterlist(struct ecryptfs_crypt_st= at *crypt_stat, > crypt_stat->flags |=3D ECRYPTFS_KEY_SET; > } > mutex_unlock(&crypt_stat->cs_tfm_mutex); > - ablkcipher_request_set_crypt(req, src_sg, dst_sg, size, iv); > - rc =3D op =3D=3D ENCRYPT ? crypto_ablkcipher_encrypt(req) : > - crypto_ablkcipher_decrypt(req); > + skcipher_request_set_crypt(req, src_sg, dst_sg, size, iv); > + rc =3D op =3D=3D ENCRYPT ? crypto_skcipher_encrypt(req) : > + crypto_skcipher_decrypt(req); > if (rc =3D=3D -EINPROGRESS || rc =3D=3D -EBUSY) { > struct extent_crypt_result *ecr =3D req->base.data; > =20 > @@ -394,7 +387,7 @@ static int crypt_scatterlist(struct ecryptfs_crypt_st= at *crypt_stat, > reinit_completion(&ecr->completion); > } > out: > - ablkcipher_request_free(req); > + skcipher_request_free(req); > return rc; > } > =20 > @@ -622,7 +615,7 @@ int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_sta= t *crypt_stat) > crypt_stat->cipher, "cbc"); > if (rc) > goto out_unlock; > - crypt_stat->tfm =3D crypto_alloc_ablkcipher(full_alg_name, 0, 0); > + crypt_stat->tfm =3D crypto_alloc_skcipher(full_alg_name, 0, 0); > if (IS_ERR(crypt_stat->tfm)) { > rc =3D PTR_ERR(crypt_stat->tfm); > crypt_stat->tfm =3D NULL; > @@ -631,7 +624,7 @@ int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_sta= t *crypt_stat) > full_alg_name); > goto out_free; > } > - crypto_ablkcipher_set_flags(crypt_stat->tfm, CRYPTO_TFM_REQ_WEAK_KEY); > + crypto_skcipher_set_flags(crypt_stat->tfm, CRYPTO_TFM_REQ_WEAK_KEY); > rc =3D 0; > out_free: > kfree(full_alg_name); > @@ -1591,7 +1584,7 @@ out: > * event, regardless of whether this function succeeds for fails. > */ > static int > -ecryptfs_process_key_cipher(struct crypto_blkcipher **key_tfm, > +ecryptfs_process_key_cipher(struct crypto_skcipher **key_tfm, > char *cipher_name, size_t *key_size) > { > char dummy_key[ECRYPTFS_MAX_KEY_BYTES]; > @@ -1609,21 +1602,18 @@ ecryptfs_process_key_cipher(struct crypto_blkciph= er **key_tfm, > "ecb"); > if (rc) > goto out; > - *key_tfm =3D crypto_alloc_blkcipher(full_alg_name, 0, CRYPTO_ALG_ASYNC); > + *key_tfm =3D crypto_alloc_skcipher(full_alg_name, 0, CRYPTO_ALG_ASYNC); > if (IS_ERR(*key_tfm)) { > rc =3D PTR_ERR(*key_tfm); > printk(KERN_ERR "Unable to allocate crypto cipher with name " > "[%s]; rc =3D [%d]\n", full_alg_name, rc); > goto out; > } > - crypto_blkcipher_set_flags(*key_tfm, CRYPTO_TFM_REQ_WEAK_KEY); > - if (*key_size =3D=3D 0) { > - struct blkcipher_alg *alg =3D crypto_blkcipher_alg(*key_tfm); > - > - *key_size =3D alg->max_keysize; > - } > + crypto_skcipher_set_flags(*key_tfm, CRYPTO_TFM_REQ_WEAK_KEY); > + if (*key_size =3D=3D 0) > + *key_size =3D crypto_skcipher_default_keysize(*key_tfm); > get_random_bytes(dummy_key, *key_size); > - rc =3D crypto_blkcipher_setkey(*key_tfm, dummy_key, *key_size); > + rc =3D crypto_skcipher_setkey(*key_tfm, dummy_key, *key_size); > if (rc) { > printk(KERN_ERR "Error attempting to set key of size [%zd] for " > "cipher [%s]; rc =3D [%d]\n", *key_size, full_alg_name, > @@ -1660,8 +1650,7 @@ int ecryptfs_destroy_crypto(void) > list_for_each_entry_safe(key_tfm, key_tfm_tmp, &key_tfm_list, > key_tfm_list) { > list_del(&key_tfm->key_tfm_list); > - if (key_tfm->key_tfm) > - crypto_free_blkcipher(key_tfm->key_tfm); > + crypto_free_skcipher(key_tfm->key_tfm); > kmem_cache_free(ecryptfs_key_tfm_cache, key_tfm); > } > mutex_unlock(&key_tfm_list_mutex); > @@ -1747,7 +1736,7 @@ int ecryptfs_tfm_exists(char *cipher_name, struct e= cryptfs_key_tfm **key_tfm) > * Searches for cached item first, and creates new if not found. > * Returns 0 on success, non-zero if adding new cipher failed > */ > -int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher *= *tfm, > +int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **= tfm, > struct mutex **tfm_mutex, > char *cipher_name) > { > @@ -2120,7 +2109,7 @@ out: > int ecryptfs_set_f_namelen(long *namelen, long lower_namelen, > struct ecryptfs_mount_crypt_stat *mount_crypt_stat) > { > - struct blkcipher_desc desc; > + struct crypto_skcipher *tfm; > struct mutex *tfm_mutex; > size_t cipher_blocksize; > int rc; > @@ -2130,7 +2119,7 @@ int ecryptfs_set_f_namelen(long *namelen, long lowe= r_namelen, > return 0; > } > =20 > - rc =3D ecryptfs_get_tfm_and_mutex_for_cipher_name(&desc.tfm, &tfm_mutex, > + rc =3D ecryptfs_get_tfm_and_mutex_for_cipher_name(&tfm, &tfm_mutex, > mount_crypt_stat->global_default_fn_cipher_name); > if (unlikely(rc)) { > (*namelen) =3D 0; > @@ -2138,7 +2127,7 @@ int ecryptfs_set_f_namelen(long *namelen, long lowe= r_namelen, > } > =20 > mutex_lock(tfm_mutex); > - cipher_blocksize =3D crypto_blkcipher_blocksize(desc.tfm); > + cipher_blocksize =3D crypto_skcipher_blocksize(tfm); > mutex_unlock(tfm_mutex); > =20 > /* Return an exact amount for the common cases */ > diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h > index 7b39260..b7f8128 100644 > --- a/fs/ecryptfs/ecryptfs_kernel.h > +++ b/fs/ecryptfs/ecryptfs_kernel.h > @@ -28,6 +28,7 @@ > #ifndef ECRYPTFS_KERNEL_H > #define ECRYPTFS_KERNEL_H > =20 > +#include > #include > #include > #include > @@ -38,7 +39,6 @@ > #include > #include > #include > -#include > =20 > #define ECRYPTFS_DEFAULT_IV_BYTES 16 > #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096 > @@ -233,9 +233,9 @@ struct ecryptfs_crypt_stat { > size_t extent_shift; > unsigned int extent_mask; > struct ecryptfs_mount_crypt_stat *mount_crypt_stat; > - struct crypto_ablkcipher *tfm; > - struct crypto_hash *hash_tfm; /* Crypto context for generating > - * the initialization vectors */ > + struct crypto_skcipher *tfm; > + struct crypto_shash *hash_tfm; /* Crypto context for generating > + * the initialization vectors */ > unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; > unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; > unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; > @@ -309,7 +309,7 @@ struct ecryptfs_global_auth_tok { > * keeps a list of crypto API contexts around to use when needed. > */ > struct ecryptfs_key_tfm { > - struct crypto_blkcipher *key_tfm; > + struct crypto_skcipher *key_tfm; > size_t key_size; > struct mutex key_tfm_mutex; > struct list_head key_tfm_list; > @@ -659,7 +659,7 @@ ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **ke= y_tfm, char *cipher_name, > int ecryptfs_init_crypto(void); > int ecryptfs_destroy_crypto(void); > int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key= _tfm); > -int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher *= *tfm, > +int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **= tfm, > struct mutex **tfm_mutex, > char *cipher_name); > int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key, > diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c > index 040aa87..ed74d80 100644 > --- a/fs/ecryptfs/inode.c > +++ b/fs/ecryptfs/inode.c > @@ -29,7 +29,6 @@ > #include > #include > #include > -#include > #include > #include > #include > diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c > index 6bd67e2..c5c84df 100644 > --- a/fs/ecryptfs/keystore.c > +++ b/fs/ecryptfs/keystore.c > @@ -25,11 +25,12 @@ > * 02111-1307, USA. > */ > =20 > +#include > +#include > #include > #include > #include > #include > -#include > #include > #include > #include "ecryptfs_kernel.h" > @@ -601,12 +602,13 @@ struct ecryptfs_write_tag_70_packet_silly_stack { > struct ecryptfs_auth_tok *auth_tok; > struct scatterlist src_sg[2]; > struct scatterlist dst_sg[2]; > - struct blkcipher_desc desc; > + struct crypto_skcipher *skcipher_tfm; > + struct skcipher_request *skcipher_req; > char iv[ECRYPTFS_MAX_IV_BYTES]; > char hash[ECRYPTFS_TAG_70_DIGEST_SIZE]; > char tmp_hash[ECRYPTFS_TAG_70_DIGEST_SIZE]; > - struct hash_desc hash_desc; > - struct scatterlist hash_sg; > + struct crypto_shash *hash_tfm; > + struct shash_desc *hash_desc; > }; > =20 > /** > @@ -629,14 +631,13 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *re= maining_bytes, > struct key *auth_tok_key =3D NULL; > int rc =3D 0; > =20 > - s =3D kmalloc(sizeof(*s), GFP_KERNEL); > + s =3D kzalloc(sizeof(*s), GFP_KERNEL); > if (!s) { > printk(KERN_ERR "%s: Out of memory whilst trying to kmalloc " > "[%zd] bytes of kernel memory\n", __func__, sizeof(*s)); > rc =3D -ENOMEM; > goto out; > } > - s->desc.flags =3D CRYPTO_TFM_REQ_MAY_SLEEP; > (*packet_size) =3D 0; > rc =3D ecryptfs_find_auth_tok_for_sig( > &auth_tok_key, > @@ -649,7 +650,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *rema= ining_bytes, > goto out; > } > rc =3D ecryptfs_get_tfm_and_mutex_for_cipher_name( > - &s->desc.tfm, > + &s->skcipher_tfm, > &s->tfm_mutex, mount_crypt_stat->global_default_fn_cipher_name); > if (unlikely(rc)) { > printk(KERN_ERR "Internal error whilst attempting to get " > @@ -658,7 +659,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *rema= ining_bytes, > goto out; > } > mutex_lock(s->tfm_mutex); > - s->block_size =3D crypto_blkcipher_blocksize(s->desc.tfm); > + s->block_size =3D crypto_skcipher_blocksize(s->skcipher_tfm); > /* Plus one for the \0 separator between the random prefix > * and the plaintext filename */ > s->num_rand_bytes =3D (ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES + 1); > @@ -691,6 +692,19 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *rem= aining_bytes, > rc =3D -EINVAL; > goto out_unlock; > } > + > + s->skcipher_req =3D skcipher_request_alloc(s->skcipher_tfm, GFP_KERNEL); > + if (!s->skcipher_req) { > + printk(KERN_ERR "%s: Out of kernel memory whilst attempting to " > + "skcipher_request_alloc for %s\n", __func__, > + crypto_skcipher_driver_name(s->skcipher_tfm)); > + rc =3D -ENOMEM; > + goto out_unlock; > + } > + > + skcipher_request_set_callback(s->skcipher_req, > + CRYPTO_TFM_REQ_MAY_SLEEP, NULL, NULL); > + > s->block_aligned_filename =3D kzalloc(s->block_aligned_filename_size, > GFP_KERNEL); > if (!s->block_aligned_filename) { > @@ -700,7 +714,6 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *rema= ining_bytes, > rc =3D -ENOMEM; > goto out_unlock; > } > - s->i =3D 0; > dest[s->i++] =3D ECRYPTFS_TAG_70_PACKET_TYPE; > rc =3D ecryptfs_write_packet_length(&dest[s->i], > (ECRYPTFS_SIG_SIZE > @@ -738,40 +751,36 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *re= maining_bytes, > "password tokens\n", __func__); > goto out_free_unlock; > } > - sg_init_one( > - &s->hash_sg, > - (u8 *)s->auth_tok->token.password.session_key_encryption_key, > - s->auth_tok->token.password.session_key_encryption_key_bytes); > - s->hash_desc.flags =3D CRYPTO_TFM_REQ_MAY_SLEEP; > - s->hash_desc.tfm =3D crypto_alloc_hash(ECRYPTFS_TAG_70_DIGEST, 0, > - CRYPTO_ALG_ASYNC); > - if (IS_ERR(s->hash_desc.tfm)) { > - rc =3D PTR_ERR(s->hash_desc.tfm); > + s->hash_tfm =3D crypto_alloc_shash(ECRYPTFS_TAG_70_DIGEST, 0, 0); > + if (IS_ERR(s->hash_tfm)) { > + rc =3D PTR_ERR(s->hash_tfm); > printk(KERN_ERR "%s: Error attempting to " > "allocate hash crypto context; rc =3D [%d]\n", > __func__, rc); > goto out_free_unlock; > } > - rc =3D crypto_hash_init(&s->hash_desc); > - if (rc) { > - printk(KERN_ERR > - "%s: Error initializing crypto hash; rc =3D [%d]\n", > - __func__, rc); > - goto out_release_free_unlock; > - } > - rc =3D crypto_hash_update( > - &s->hash_desc, &s->hash_sg, > - s->auth_tok->token.password.session_key_encryption_key_bytes); > - if (rc) { > - printk(KERN_ERR > - "%s: Error updating crypto hash; rc =3D [%d]\n", > - __func__, rc); > + > + s->hash_desc =3D kmalloc(sizeof(*s->hash_desc) + > + crypto_shash_descsize(s->hash_tfm), GFP_KERNEL); > + if (!s->hash_desc) { > + printk(KERN_ERR "%s: Out of kernel memory whilst attempting to " > + "kmalloc [%zd] bytes\n", __func__, > + sizeof(*s->hash_desc) + > + crypto_shash_descsize(s->hash_tfm)); > + rc =3D -ENOMEM; > goto out_release_free_unlock; > } > - rc =3D crypto_hash_final(&s->hash_desc, s->hash); > + > + s->hash_desc->tfm =3D s->hash_tfm; > + s->hash_desc->flags =3D CRYPTO_TFM_REQ_MAY_SLEEP; > + > + rc =3D crypto_shash_digest(s->hash_desc, > + (u8 *)s->auth_tok->token.password.session_key_encryption_key, > + s->auth_tok->token.password.session_key_encryption_key_bytes, > + s->hash); > if (rc) { > printk(KERN_ERR > - "%s: Error finalizing crypto hash; rc =3D [%d]\n", > + "%s: Error computing crypto hash; rc =3D [%d]\n", > __func__, rc); > goto out_release_free_unlock; > } > @@ -780,27 +789,12 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *re= maining_bytes, > s->hash[(s->j % ECRYPTFS_TAG_70_DIGEST_SIZE)]; > if ((s->j % ECRYPTFS_TAG_70_DIGEST_SIZE) > =3D=3D (ECRYPTFS_TAG_70_DIGEST_SIZE - 1)) { > - sg_init_one(&s->hash_sg, (u8 *)s->hash, > - ECRYPTFS_TAG_70_DIGEST_SIZE); > - rc =3D crypto_hash_init(&s->hash_desc); > - if (rc) { > - printk(KERN_ERR > - "%s: Error initializing crypto hash; " > - "rc =3D [%d]\n", __func__, rc); > - goto out_release_free_unlock; > - } > - rc =3D crypto_hash_update(&s->hash_desc, &s->hash_sg, > - ECRYPTFS_TAG_70_DIGEST_SIZE); > + rc =3D crypto_shash_digest(s->hash_desc, (u8 *)s->hash, > + ECRYPTFS_TAG_70_DIGEST_SIZE, > + s->tmp_hash); > if (rc) { > printk(KERN_ERR > - "%s: Error updating crypto hash; " > - "rc =3D [%d]\n", __func__, rc); > - goto out_release_free_unlock; > - } > - rc =3D crypto_hash_final(&s->hash_desc, s->tmp_hash); > - if (rc) { > - printk(KERN_ERR > - "%s: Error finalizing crypto hash; " > + "%s: Error computing crypto hash; " > "rc =3D [%d]\n", __func__, rc); > goto out_release_free_unlock; > } > @@ -834,10 +828,8 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *rem= aining_bytes, > * of the IV here, so we just use 0's for the IV. Note the > * constraint that ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES > * >=3D ECRYPTFS_MAX_IV_BYTES. */ > - memset(s->iv, 0, ECRYPTFS_MAX_IV_BYTES); > - s->desc.info =3D s->iv; > - rc =3D crypto_blkcipher_setkey( > - s->desc.tfm, > + rc =3D crypto_skcipher_setkey( > + s->skcipher_tfm, > s->auth_tok->token.password.session_key_encryption_key, > mount_crypt_stat->global_default_fn_cipher_key_bytes); > if (rc < 0) { > @@ -850,8 +842,9 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *rema= ining_bytes, > mount_crypt_stat->global_default_fn_cipher_key_bytes); > goto out_release_free_unlock; > } > - rc =3D crypto_blkcipher_encrypt_iv(&s->desc, s->dst_sg, s->src_sg, > - s->block_aligned_filename_size); > + skcipher_request_set_crypt(s->skcipher_req, s->src_sg, s->dst_sg, > + s->block_aligned_filename_size, s->iv); > + rc =3D crypto_skcipher_encrypt(s->skcipher_req); > if (rc) { > printk(KERN_ERR "%s: Error attempting to encrypt filename; " > "rc =3D [%d]\n", __func__, rc); > @@ -861,7 +854,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *rema= ining_bytes, > (*packet_size) =3D s->i; > (*remaining_bytes) -=3D (*packet_size); > out_release_free_unlock: > - crypto_free_hash(s->hash_desc.tfm); > + crypto_free_shash(s->hash_tfm); > out_free_unlock: > kzfree(s->block_aligned_filename); > out_unlock: > @@ -871,6 +864,8 @@ out: > up_write(&(auth_tok_key->sem)); > key_put(auth_tok_key); > } > + skcipher_request_free(s->skcipher_req); > + kzfree(s->hash_desc); > kfree(s); > return rc; > } > @@ -888,7 +883,8 @@ struct ecryptfs_parse_tag_70_packet_silly_stack { > struct ecryptfs_auth_tok *auth_tok; > struct scatterlist src_sg[2]; > struct scatterlist dst_sg[2]; > - struct blkcipher_desc desc; > + struct crypto_skcipher *skcipher_tfm; > + struct skcipher_request *skcipher_req; > char fnek_sig_hex[ECRYPTFS_SIG_SIZE_HEX + 1]; > char iv[ECRYPTFS_MAX_IV_BYTES]; > char cipher_string[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; > @@ -922,14 +918,13 @@ ecryptfs_parse_tag_70_packet(char **filename, size_= t *filename_size, > (*packet_size) =3D 0; > (*filename_size) =3D 0; > (*filename) =3D NULL; > - s =3D kmalloc(sizeof(*s), GFP_KERNEL); > + s =3D kzalloc(sizeof(*s), GFP_KERNEL); > if (!s) { > printk(KERN_ERR "%s: Out of memory whilst trying to kmalloc " > "[%zd] bytes of kernel memory\n", __func__, sizeof(*s)); > rc =3D -ENOMEM; > goto out; > } > - s->desc.flags =3D CRYPTO_TFM_REQ_MAY_SLEEP; > if (max_packet_size < ECRYPTFS_TAG_70_MIN_METADATA_SIZE) { > printk(KERN_WARNING "%s: max_packet_size is [%zd]; it must be " > "at least [%d]\n", __func__, max_packet_size, > @@ -992,7 +987,7 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t = *filename_size, > rc); > goto out; > } > - rc =3D ecryptfs_get_tfm_and_mutex_for_cipher_name(&s->desc.tfm, > + rc =3D ecryptfs_get_tfm_and_mutex_for_cipher_name(&s->skcipher_tfm, > &s->tfm_mutex, > s->cipher_string); > if (unlikely(rc)) { > @@ -1030,12 +1025,23 @@ ecryptfs_parse_tag_70_packet(char **filename, siz= e_t *filename_size, > __func__, rc, s->block_aligned_filename_size); > goto out_free_unlock; > } > + > + s->skcipher_req =3D skcipher_request_alloc(s->skcipher_tfm, GFP_KERNEL); > + if (!s->skcipher_req) { > + printk(KERN_ERR "%s: Out of kernel memory whilst attempting to " > + "skcipher_request_alloc for %s\n", __func__, > + crypto_skcipher_driver_name(s->skcipher_tfm)); > + rc =3D -ENOMEM; > + goto out_free_unlock; > + } > + > + skcipher_request_set_callback(s->skcipher_req, > + CRYPTO_TFM_REQ_MAY_SLEEP, NULL, NULL); > + > /* The characters in the first block effectively do the job of > * the IV here, so we just use 0's for the IV. Note the > * constraint that ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES > * >=3D ECRYPTFS_MAX_IV_BYTES. */ > - memset(s->iv, 0, ECRYPTFS_MAX_IV_BYTES); > - s->desc.info =3D s->iv; > /* TODO: Support other key modules than passphrase for > * filename encryption */ > if (s->auth_tok->token_type !=3D ECRYPTFS_PASSWORD) { > @@ -1044,8 +1050,8 @@ ecryptfs_parse_tag_70_packet(char **filename, size_= t *filename_size, > "password tokens\n", __func__); > goto out_free_unlock; > } > - rc =3D crypto_blkcipher_setkey( > - s->desc.tfm, > + rc =3D crypto_skcipher_setkey( > + s->skcipher_tfm, > s->auth_tok->token.password.session_key_encryption_key, > mount_crypt_stat->global_default_fn_cipher_key_bytes); > if (rc < 0) { > @@ -1058,14 +1064,14 @@ ecryptfs_parse_tag_70_packet(char **filename, siz= e_t *filename_size, > mount_crypt_stat->global_default_fn_cipher_key_bytes); > goto out_free_unlock; > } > - rc =3D crypto_blkcipher_decrypt_iv(&s->desc, s->dst_sg, s->src_sg, > - s->block_aligned_filename_size); > + skcipher_request_set_crypt(s->skcipher_req, s->src_sg, s->dst_sg, > + s->block_aligned_filename_size, s->iv); > + rc =3D crypto_skcipher_decrypt(s->skcipher_req); > if (rc) { > printk(KERN_ERR "%s: Error attempting to decrypt filename; " > "rc =3D [%d]\n", __func__, rc); > goto out_free_unlock; > } > - s->i =3D 0; > while (s->decrypted_filename[s->i] !=3D '\0' > && s->i < s->block_aligned_filename_size) > s->i++; > @@ -1108,6 +1114,7 @@ out: > up_write(&(auth_tok_key->sem)); > key_put(auth_tok_key); > } > + skcipher_request_free(s->skcipher_req); > kfree(s); > return rc; > } > @@ -1667,9 +1674,8 @@ decrypt_passphrase_encrypted_session_key(struct ecr= yptfs_auth_tok *auth_tok, > struct scatterlist dst_sg[2]; > struct scatterlist src_sg[2]; > struct mutex *tfm_mutex; > - struct blkcipher_desc desc =3D { > - .flags =3D CRYPTO_TFM_REQ_MAY_SLEEP > - }; > + struct crypto_skcipher *tfm; > + struct skcipher_request *req =3D NULL; > int rc =3D 0; > =20 > if (unlikely(ecryptfs_verbosity > 0)) { > @@ -1680,7 +1686,7 @@ decrypt_passphrase_encrypted_session_key(struct ecr= yptfs_auth_tok *auth_tok, > auth_tok->token.password.session_key_encryption_key, > auth_tok->token.password.session_key_encryption_key_bytes); > } > - rc =3D ecryptfs_get_tfm_and_mutex_for_cipher_name(&desc.tfm, &tfm_mutex, > + rc =3D ecryptfs_get_tfm_and_mutex_for_cipher_name(&tfm, &tfm_mutex, > crypt_stat->cipher); > if (unlikely(rc)) { > printk(KERN_ERR "Internal error whilst attempting to get " > @@ -1711,8 +1717,20 @@ decrypt_passphrase_encrypted_session_key(struct ec= ryptfs_auth_tok *auth_tok, > goto out; > } > mutex_lock(tfm_mutex); > - rc =3D crypto_blkcipher_setkey( > - desc.tfm, auth_tok->token.password.session_key_encryption_key, > + req =3D skcipher_request_alloc(tfm, GFP_KERNEL); > + if (!req) { > + mutex_unlock(tfm_mutex); > + printk(KERN_ERR "%s: Out of kernel memory whilst attempting to " > + "skcipher_request_alloc for %s\n", __func__, > + crypto_skcipher_driver_name(tfm)); > + rc =3D -ENOMEM; > + goto out; > + } > + > + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP, > + NULL, NULL); > + rc =3D crypto_skcipher_setkey( > + tfm, auth_tok->token.password.session_key_encryption_key, > crypt_stat->key_size); > if (unlikely(rc < 0)) { > mutex_unlock(tfm_mutex); > @@ -1720,8 +1738,10 @@ decrypt_passphrase_encrypted_session_key(struct ec= ryptfs_auth_tok *auth_tok, > rc =3D -EINVAL; > goto out; > } > - rc =3D crypto_blkcipher_decrypt(&desc, dst_sg, src_sg, > - auth_tok->session_key.encrypted_key_size); > + skcipher_request_set_crypt(req, src_sg, dst_sg, > + auth_tok->session_key.encrypted_key_size, > + NULL); > + rc =3D crypto_skcipher_decrypt(req); > mutex_unlock(tfm_mutex); > if (unlikely(rc)) { > printk(KERN_ERR "Error decrypting; rc =3D [%d]\n", rc); > @@ -1738,6 +1758,7 @@ decrypt_passphrase_encrypted_session_key(struct ecr= yptfs_auth_tok *auth_tok, > crypt_stat->key_size); > } > out: > + skcipher_request_free(req); > return rc; > } > =20 > @@ -2191,16 +2212,14 @@ write_tag_3_packet(char *dest, size_t *remaining_= bytes, > size_t max_packet_size; > struct ecryptfs_mount_crypt_stat *mount_crypt_stat =3D > crypt_stat->mount_crypt_stat; > - struct blkcipher_desc desc =3D { > - .tfm =3D NULL, > - .flags =3D CRYPTO_TFM_REQ_MAY_SLEEP > - }; > + struct crypto_skcipher *tfm; > + struct skcipher_request *req; > int rc =3D 0; > =20 > (*packet_size) =3D 0; > ecryptfs_from_hex(key_rec->sig, auth_tok->token.password.signature, > ECRYPTFS_SIG_SIZE); > - rc =3D ecryptfs_get_tfm_and_mutex_for_cipher_name(&desc.tfm, &tfm_mutex, > + rc =3D ecryptfs_get_tfm_and_mutex_for_cipher_name(&tfm, &tfm_mutex, > crypt_stat->cipher); > if (unlikely(rc)) { > printk(KERN_ERR "Internal error whilst attempting to get " > @@ -2209,12 +2228,11 @@ write_tag_3_packet(char *dest, size_t *remaining_= bytes, > goto out; > } > if (mount_crypt_stat->global_default_cipher_key_size =3D=3D 0) { > - struct blkcipher_alg *alg =3D crypto_blkcipher_alg(desc.tfm); > - > printk(KERN_WARNING "No key size specified at mount; " > - "defaulting to [%d]\n", alg->max_keysize); > + "defaulting to [%d]\n", > + crypto_skcipher_default_keysize(tfm)); > mount_crypt_stat->global_default_cipher_key_size =3D > - alg->max_keysize; > + crypto_skcipher_default_keysize(tfm); > } > if (crypt_stat->key_size =3D=3D 0) > crypt_stat->key_size =3D > @@ -2284,20 +2302,36 @@ write_tag_3_packet(char *dest, size_t *remaining_= bytes, > goto out; > } > mutex_lock(tfm_mutex); > - rc =3D crypto_blkcipher_setkey(desc.tfm, session_key_encryption_key, > - crypt_stat->key_size); > + rc =3D crypto_skcipher_setkey(tfm, session_key_encryption_key, > + crypt_stat->key_size); > if (rc < 0) { > mutex_unlock(tfm_mutex); > ecryptfs_printk(KERN_ERR, "Error setting key for crypto " > "context; rc =3D [%d]\n", rc); > goto out; > } > + > + req =3D skcipher_request_alloc(tfm, GFP_KERNEL); > + if (!req) { > + mutex_unlock(tfm_mutex); > + ecryptfs_printk(KERN_ERR, "Out of kernel memory whilst " > + "attempting to skcipher_request_alloc for " > + "%s\n", crypto_skcipher_driver_name(tfm)); > + rc =3D -ENOMEM; > + goto out; > + } > + > + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP, > + NULL, NULL); > + > rc =3D 0; > ecryptfs_printk(KERN_DEBUG, "Encrypting [%zd] bytes of the key\n", > crypt_stat->key_size); > - rc =3D crypto_blkcipher_encrypt(&desc, dst_sg, src_sg, > - (*key_rec).enc_key_size); > + skcipher_request_set_crypt(req, src_sg, dst_sg, > + (*key_rec).enc_key_size, NULL); > + rc =3D crypto_skcipher_encrypt(req); > mutex_unlock(tfm_mutex); > + skcipher_request_free(req); > if (rc) { > printk(KERN_ERR "Error encrypting; rc =3D [%d]\n", rc); > goto out; > diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c > index e25b6b0..8b0b4a7 100644 > --- a/fs/ecryptfs/main.c > +++ b/fs/ecryptfs/main.c > @@ -29,7 +29,6 @@ > #include > #include > #include > -#include > #include > #include > #include > diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c > index caba848..36c8b08 100644 > --- a/fs/ecryptfs/mmap.c > +++ b/fs/ecryptfs/mmap.c > @@ -30,7 +30,6 @@ > #include > #include > #include > -#include > #include > #include > #include > diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c > index afa1b81..77a486d 100644 > --- a/fs/ecryptfs/super.c > +++ b/fs/ecryptfs/super.c > @@ -29,7 +29,6 @@ > #include > #include > #include > -#include > #include > #include > #include "ecryptfs_kernel.h" > --=20 > Email: Herbert Xu > Home Page: http://gondor.apana.org.au/~herbert/ > PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt > -- > To unsubscribe from this list: send the line "unsubscribe ecryptfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html --huq684BweRXVnRxX Content-Type: application/pgp-signature; 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