From 73bed26f73a120f14cabf8d214ec5078bb42dea9 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Thu, 2 Jan 2020 19:58:47 -0800 Subject: crypto: akcipher - pass instance to crypto_grab_akcipher() Initializing a crypto_akcipher_spawn currently requires: 1. Set spawn->base.inst to point to the instance. 2. Call crypto_grab_akcipher(). But there's no reason for these steps to be separate, and in fact this unneeded complication has caused at least one bug, the one fixed by commit 6db43410179b ("crypto: adiantum - initialize crypto_spawn::inst") So just make crypto_grab_akcipher() take the instance as an argument. To keep the function call from getting too unwieldy due to this extra argument, also introduce a 'mask' variable into pkcs1pad_create(). Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu --- crypto/akcipher.c | 6 ++++-- crypto/rsa-pkcs1pad.c | 8 +++++--- include/crypto/internal/akcipher.h | 12 +++--------- 3 files changed, 12 insertions(+), 14 deletions(-) diff --git a/crypto/akcipher.c b/crypto/akcipher.c index 7d5cf4939423..84ccf9b02bbe 100644 --- a/crypto/akcipher.c +++ b/crypto/akcipher.c @@ -90,9 +90,11 @@ static const struct crypto_type crypto_akcipher_type = { .tfmsize = offsetof(struct crypto_akcipher, base), }; -int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, const char *name, - u32 type, u32 mask) +int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, + struct crypto_instance *inst, + const char *name, u32 type, u32 mask) { + spawn->base.inst = inst; spawn->base.frontend = &crypto_akcipher_type; return crypto_grab_spawn(&spawn->base, name, type, mask); } diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c index 0aa489711ec4..176b63afec8d 100644 --- a/crypto/rsa-pkcs1pad.c +++ b/crypto/rsa-pkcs1pad.c @@ -598,6 +598,7 @@ 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; @@ -613,6 +614,8 @@ static int pkcs1pad_create(struct crypto_template *tmpl, struct rtattr **tb) if ((algt->type ^ CRYPTO_ALG_TYPE_AKCIPHER) & algt->mask) return -EINVAL; + 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); @@ -636,9 +639,8 @@ static int pkcs1pad_create(struct crypto_template *tmpl, struct rtattr **tb) spawn = &ctx->spawn; ctx->digest_info = digest_info; - crypto_set_spawn(&spawn->base, akcipher_crypto_instance(inst)); - err = crypto_grab_akcipher(spawn, rsa_alg_name, 0, - crypto_requires_sync(algt->type, algt->mask)); + err = crypto_grab_akcipher(spawn, akcipher_crypto_instance(inst), + rsa_alg_name, 0, mask); if (err) goto out_free_inst; diff --git a/include/crypto/internal/akcipher.h b/include/crypto/internal/akcipher.h index d6c8a42789ad..8d3220c9ab77 100644 --- a/include/crypto/internal/akcipher.h +++ b/include/crypto/internal/akcipher.h @@ -78,15 +78,9 @@ static inline void *akcipher_instance_ctx(struct akcipher_instance *inst) return crypto_instance_ctx(akcipher_crypto_instance(inst)); } -static inline void crypto_set_akcipher_spawn( - struct crypto_akcipher_spawn *spawn, - struct crypto_instance *inst) -{ - crypto_set_spawn(&spawn->base, inst); -} - -int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, const char *name, - u32 type, u32 mask); +int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, + struct crypto_instance *inst, + const char *name, u32 type, u32 mask); static inline struct crypto_akcipher *crypto_spawn_akcipher( struct crypto_akcipher_spawn *spawn) -- cgit