diff options
| -rw-r--r-- | crypto/rsa-pkcs1pad.c | 59 |
1 files changed, 20 insertions, 39 deletions
diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c index 176b63afec8d..d31031de51bc 100644 --- a/crypto/rsa-pkcs1pad.c +++ b/crypto/rsa-pkcs1pad.c @@ -596,14 +596,11 @@ static void pkcs1pad_free(struct akcipher_instance *inst) static int pkcs1pad_create(struct crypto_template *tmpl, struct rtattr **tb) { - const struct rsa_asn1_template *digest_info; struct crypto_attr_type *algt; u32 mask; struct akcipher_instance *inst; struct pkcs1pad_inst_ctx *ctx; - struct crypto_akcipher_spawn *spawn; struct akcipher_alg *rsa_alg; - const char *rsa_alg_name; const char *hash_name; int err; @@ -616,60 +613,49 @@ static int pkcs1pad_create(struct crypto_template *tmpl, struct rtattr **tb) mask = crypto_requires_sync(algt->type, algt->mask); - rsa_alg_name = crypto_attr_alg_name(tb[1]); - if (IS_ERR(rsa_alg_name)) - return PTR_ERR(rsa_alg_name); - - hash_name = crypto_attr_alg_name(tb[2]); - if (IS_ERR(hash_name)) - hash_name = NULL; - - if (hash_name) { - digest_info = rsa_lookup_asn1(hash_name); - if (!digest_info) - return -EINVAL; - } else - digest_info = NULL; - inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) return -ENOMEM; ctx = akcipher_instance_ctx(inst); - spawn = &ctx->spawn; - ctx->digest_info = digest_info; - err = crypto_grab_akcipher(spawn, akcipher_crypto_instance(inst), - rsa_alg_name, 0, mask); + err = crypto_grab_akcipher(&ctx->spawn, akcipher_crypto_instance(inst), + crypto_attr_alg_name(tb[1]), 0, mask); if (err) - goto out_free_inst; + goto err_free_inst; - rsa_alg = crypto_spawn_akcipher_alg(spawn); + rsa_alg = crypto_spawn_akcipher_alg(&ctx->spawn); err = -ENAMETOOLONG; - - if (!hash_name) { + hash_name = crypto_attr_alg_name(tb[2]); + if (IS_ERR(hash_name)) { if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, "pkcs1pad(%s)", rsa_alg->base.cra_name) >= CRYPTO_MAX_ALG_NAME) - goto out_drop_alg; + goto err_free_inst; if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "pkcs1pad(%s)", rsa_alg->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) - goto out_drop_alg; + goto err_free_inst; } else { + ctx->digest_info = rsa_lookup_asn1(hash_name); + if (!ctx->digest_info) { + err = -EINVAL; + goto err_free_inst; + } + if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, "pkcs1pad(%s,%s)", rsa_alg->base.cra_name, hash_name) >= CRYPTO_MAX_ALG_NAME) - goto out_drop_alg; + goto err_free_inst; if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "pkcs1pad(%s,%s)", rsa_alg->base.cra_driver_name, hash_name) >= CRYPTO_MAX_ALG_NAME) - goto out_drop_alg; + goto err_free_inst; } inst->alg.base.cra_flags = rsa_alg->base.cra_flags & CRYPTO_ALG_ASYNC; @@ -691,15 +677,10 @@ static int pkcs1pad_create(struct crypto_template *tmpl, struct rtattr **tb) inst->free = pkcs1pad_free; err = akcipher_register_instance(tmpl, inst); - if (err) - goto out_drop_alg; - - return 0; - -out_drop_alg: - crypto_drop_akcipher(spawn); -out_free_inst: - kfree(inst); + if (err) { +err_free_inst: + pkcs1pad_free(inst); + } return err; } |