diff options
| -rw-r--r-- | crypto/pcbc.c | 125 |
1 files changed, 11 insertions, 114 deletions
diff --git a/crypto/pcbc.c b/crypto/pcbc.c index 4f97a9d069b6..2fa03fc576fe 100644 --- a/crypto/pcbc.c +++ b/crypto/pcbc.c @@ -20,28 +20,6 @@ #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/slab.h> -#include <linux/compiler.h> - -struct crypto_pcbc_ctx { - struct crypto_cipher *child; -}; - -static int crypto_pcbc_setkey(struct crypto_skcipher *parent, const u8 *key, - unsigned int keylen) -{ - struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(parent); - struct crypto_cipher *child = ctx->child; - int err; - - crypto_cipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); - crypto_cipher_set_flags(child, crypto_skcipher_get_flags(parent) & - CRYPTO_TFM_REQ_MASK); - err = crypto_cipher_setkey(child, key, keylen); - crypto_skcipher_set_flags(parent, crypto_cipher_get_flags(child) & - CRYPTO_TFM_RES_MASK); - return err; -} static int crypto_pcbc_encrypt_segment(struct skcipher_request *req, struct skcipher_walk *walk, @@ -90,8 +68,7 @@ static int crypto_pcbc_encrypt_inplace(struct skcipher_request *req, static int crypto_pcbc_encrypt(struct skcipher_request *req) { struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm); - struct crypto_cipher *child = ctx->child; + struct crypto_cipher *cipher = skcipher_cipher_simple(tfm); struct skcipher_walk walk; unsigned int nbytes; int err; @@ -101,10 +78,10 @@ static int crypto_pcbc_encrypt(struct skcipher_request *req) while ((nbytes = walk.nbytes)) { if (walk.src.virt.addr == walk.dst.virt.addr) nbytes = crypto_pcbc_encrypt_inplace(req, &walk, - child); + cipher); else nbytes = crypto_pcbc_encrypt_segment(req, &walk, - child); + cipher); err = skcipher_walk_done(&walk, nbytes); } @@ -158,8 +135,7 @@ static int crypto_pcbc_decrypt_inplace(struct skcipher_request *req, static int crypto_pcbc_decrypt(struct skcipher_request *req) { struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm); - struct crypto_cipher *child = ctx->child; + struct crypto_cipher *cipher = skcipher_cipher_simple(tfm); struct skcipher_walk walk; unsigned int nbytes; int err; @@ -169,113 +145,34 @@ static int crypto_pcbc_decrypt(struct skcipher_request *req) while ((nbytes = walk.nbytes)) { if (walk.src.virt.addr == walk.dst.virt.addr) nbytes = crypto_pcbc_decrypt_inplace(req, &walk, - child); + cipher); else nbytes = crypto_pcbc_decrypt_segment(req, &walk, - child); + cipher); err = skcipher_walk_done(&walk, nbytes); } return err; } -static int crypto_pcbc_init_tfm(struct crypto_skcipher *tfm) -{ - struct skcipher_instance *inst = skcipher_alg_instance(tfm); - struct crypto_spawn *spawn = skcipher_instance_ctx(inst); - struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm); - struct crypto_cipher *cipher; - - cipher = crypto_spawn_cipher(spawn); - if (IS_ERR(cipher)) - return PTR_ERR(cipher); - - ctx->child = cipher; - return 0; -} - -static void crypto_pcbc_exit_tfm(struct crypto_skcipher *tfm) -{ - struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm); - - crypto_free_cipher(ctx->child); -} - -static void crypto_pcbc_free(struct skcipher_instance *inst) -{ - crypto_drop_skcipher(skcipher_instance_ctx(inst)); - kfree(inst); -} - static int crypto_pcbc_create(struct crypto_template *tmpl, struct rtattr **tb) { struct skcipher_instance *inst; - struct crypto_attr_type *algt; - struct crypto_spawn *spawn; struct crypto_alg *alg; int err; - algt = crypto_get_attr_type(tb); - if (IS_ERR(algt)) - return PTR_ERR(algt); - - if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask) - return -EINVAL; - - inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); - if (!inst) - return -ENOMEM; - - alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, - CRYPTO_ALG_TYPE_MASK); - err = PTR_ERR(alg); - if (IS_ERR(alg)) - goto err_free_inst; - - spawn = skcipher_instance_ctx(inst); - err = crypto_init_spawn(spawn, alg, skcipher_crypto_instance(inst), - CRYPTO_ALG_TYPE_MASK); - if (err) - goto err_put_alg; - - err = crypto_inst_setname(skcipher_crypto_instance(inst), "pcbc", alg); - if (err) - goto err_drop_spawn; + inst = skcipher_alloc_instance_simple(tmpl, tb, &alg); + if (IS_ERR(inst)) + return PTR_ERR(inst); - inst->alg.base.cra_priority = alg->cra_priority; - inst->alg.base.cra_blocksize = alg->cra_blocksize; - inst->alg.base.cra_alignmask = alg->cra_alignmask; - - inst->alg.ivsize = alg->cra_blocksize; - inst->alg.min_keysize = alg->cra_cipher.cia_min_keysize; - inst->alg.max_keysize = alg->cra_cipher.cia_max_keysize; - - inst->alg.base.cra_ctxsize = sizeof(struct crypto_pcbc_ctx); - - inst->alg.init = crypto_pcbc_init_tfm; - inst->alg.exit = crypto_pcbc_exit_tfm; - - inst->alg.setkey = crypto_pcbc_setkey; inst->alg.encrypt = crypto_pcbc_encrypt; inst->alg.decrypt = crypto_pcbc_decrypt; - inst->free = crypto_pcbc_free; - err = skcipher_register_instance(tmpl, inst); if (err) - goto err_drop_spawn; + inst->free(inst); crypto_mod_put(alg); - -out: return err; - -err_drop_spawn: - crypto_drop_spawn(spawn); -err_put_alg: - crypto_mod_put(alg); -err_free_inst: - kfree(inst); - goto out; } static struct crypto_template crypto_pcbc_tmpl = { @@ -298,5 +195,5 @@ module_init(crypto_pcbc_module_init); module_exit(crypto_pcbc_module_exit); MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("PCBC block cipher algorithm"); +MODULE_DESCRIPTION("PCBC block cipher mode of operation"); MODULE_ALIAS_CRYPTO("pcbc"); |