From: Eric Biggers <ebiggers@xxxxxxxxxx>
Initializing a crypto_skcipher_spawn currently requires:
1. Set spawn->base.inst to point to the instance.
2. Call crypto_grab_skcipher().
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_skcipher() take the instance as an argument.
To keep the function calls from getting too unwieldy due to this extra
argument, also introduce a 'mask' variable into the affected places
which weren't already using one.
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
crypto/adiantum.c | 11 ++++++-----
crypto/authenc.c | 12 ++++++------
crypto/authencesn.c | 12 ++++++------
crypto/ccm.c | 9 +++++----
crypto/chacha20poly1305.c | 13 ++++++-------
crypto/cryptd.c | 4 ++--
crypto/ctr.c | 4 ++--
crypto/cts.c | 9 +++++----
crypto/essiv.c | 13 +++++--------
crypto/gcm.c | 13 ++++++-------
crypto/lrw.c | 15 ++++++++-------
crypto/skcipher.c | 4 +++-
crypto/xts.c | 9 +++++----
include/crypto/internal/skcipher.h | 11 +++--------
14 files changed, 68 insertions(+), 71 deletions(-)
diff --git a/crypto/adiantum.c b/crypto/adiantum.c
index aded26092268..aaf8a66f871c 100644
--- a/crypto/adiantum.c
+++ b/crypto/adiantum.c
@@ -501,6 +501,7 @@ static bool adiantum_supported_algorithms(struct skcipher_alg *streamcipher_alg,
static int adiantum_create(struct crypto_template *tmpl, struct rtattr **tb)
{
struct crypto_attr_type *algt;
+ u32 mask;
const char *streamcipher_name;
const char *blockcipher_name;
const char *nhpoly1305_name;
@@ -519,6 +520,8 @@ static int adiantum_create(struct crypto_template *tmpl, struct rtattr **tb)
if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
streamcipher_name = crypto_attr_alg_name(tb[1]);
if (IS_ERR(streamcipher_name))
return PTR_ERR(streamcipher_name);
@@ -539,11 +542,9 @@ static int adiantum_create(struct crypto_template *tmpl, struct rtattr **tb)
ictx = skcipher_instance_ctx(inst);
/* Stream cipher, e.g. "xchacha12" */
- crypto_set_skcipher_spawn(&ictx->streamcipher_spawn,
- skcipher_crypto_instance(inst));
- err = crypto_grab_skcipher(&ictx->streamcipher_spawn, streamcipher_name,
- 0, crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(&ictx->streamcipher_spawn,
+ skcipher_crypto_instance(inst),
+ streamcipher_name, 0, mask);
if (err)
goto out_free_inst;
streamcipher_alg = crypto_spawn_skcipher_alg(&ictx->streamcipher_spawn);
diff --git a/crypto/authenc.c b/crypto/authenc.c
index 3f0ed9402582..aef04792702a 100644
--- a/crypto/authenc.c
+++ b/crypto/authenc.c
@@ -383,6 +383,7 @@ static int crypto_authenc_create(struct crypto_template *tmpl,
struct rtattr **tb)
{
struct crypto_attr_type *algt;
+ u32 mask;
struct aead_instance *inst;
struct hash_alg_common *auth;
struct crypto_alg *auth_base;
@@ -398,9 +399,10 @@ static int crypto_authenc_create(struct crypto_template *tmpl,
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH,
- CRYPTO_ALG_TYPE_AHASH_MASK |
- crypto_requires_sync(algt->type, algt->mask));
+ CRYPTO_ALG_TYPE_AHASH_MASK | mask);
if (IS_ERR(auth))
return PTR_ERR(auth);
@@ -423,10 +425,8 @@ static int crypto_authenc_create(struct crypto_template *tmpl,
if (err)
goto err_free_inst;
- crypto_set_skcipher_spawn(&ctx->enc, aead_crypto_instance(inst));
- err = crypto_grab_skcipher(&ctx->enc, enc_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(&ctx->enc, aead_crypto_instance(inst),
+ enc_name, 0, mask);
if (err)
goto err_drop_auth;
diff --git a/crypto/authencesn.c b/crypto/authencesn.c
index adb7554fca29..48582c3741dc 100644
--- a/crypto/authencesn.c
+++ b/crypto/authencesn.c
@@ -401,6 +401,7 @@ static int crypto_authenc_esn_create(struct crypto_template *tmpl,
struct rtattr **tb)
{
struct crypto_attr_type *algt;
+ u32 mask;
struct aead_instance *inst;
struct hash_alg_common *auth;
struct crypto_alg *auth_base;
@@ -416,9 +417,10 @@ static int crypto_authenc_esn_create(struct crypto_template *tmpl,
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH,
- CRYPTO_ALG_TYPE_AHASH_MASK |
- crypto_requires_sync(algt->type, algt->mask));
+ CRYPTO_ALG_TYPE_AHASH_MASK | mask);
if (IS_ERR(auth))
return PTR_ERR(auth);
@@ -441,10 +443,8 @@ static int crypto_authenc_esn_create(struct crypto_template *tmpl,
if (err)
goto err_free_inst;
- crypto_set_skcipher_spawn(&ctx->enc, aead_crypto_instance(inst));
- err = crypto_grab_skcipher(&ctx->enc, enc_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(&ctx->enc, aead_crypto_instance(inst),
+ enc_name, 0, mask);
if (err)
goto err_drop_auth;
diff --git a/crypto/ccm.c b/crypto/ccm.c
index 380eb619f657..d2279dc5b970 100644
--- a/crypto/ccm.c
+++ b/crypto/ccm.c
@@ -457,6 +457,7 @@ static int crypto_ccm_create_common(struct crypto_template *tmpl,
const char *mac_name)
{
struct crypto_attr_type *algt;
+ u32 mask;
struct aead_instance *inst;
struct skcipher_alg *ctr;
struct crypto_alg *mac_alg;
@@ -471,6 +472,8 @@ static int crypto_ccm_create_common(struct crypto_template *tmpl,
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
mac_alg = crypto_find_alg(mac_name, &crypto_ahash_type,
CRYPTO_ALG_TYPE_HASH,
CRYPTO_ALG_TYPE_AHASH_MASK |
@@ -495,10 +498,8 @@ static int crypto_ccm_create_common(struct crypto_template *tmpl,
if (err)
goto err_free_inst;
- crypto_set_skcipher_spawn(&ictx->ctr, aead_crypto_instance(inst));
- err = crypto_grab_skcipher(&ictx->ctr, ctr_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(&ictx->ctr, aead_crypto_instance(inst),
+ ctr_name, 0, mask);
if (err)
goto err_drop_mac;
diff --git a/crypto/chacha20poly1305.c b/crypto/chacha20poly1305.c
index 74e824e537e6..fcb8ec4ba083 100644
--- a/crypto/chacha20poly1305.c
+++ b/crypto/chacha20poly1305.c
@@ -563,6 +563,7 @@ static int chachapoly_create(struct crypto_template *tmpl, struct rtattr **tb,
const char *name, unsigned int ivsize)
{
struct crypto_attr_type *algt;
+ u32 mask;
struct aead_instance *inst;
struct skcipher_alg *chacha;
struct crypto_alg *poly;
@@ -581,6 +582,8 @@ static int chachapoly_create(struct crypto_template *tmpl, struct rtattr **tb,
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
chacha_name = crypto_attr_alg_name(tb[1]);
if (IS_ERR(chacha_name))
return PTR_ERR(chacha_name);
@@ -590,9 +593,7 @@ static int chachapoly_create(struct crypto_template *tmpl, struct rtattr **tb,
poly = crypto_find_alg(poly_name, &crypto_ahash_type,
CRYPTO_ALG_TYPE_HASH,
- CRYPTO_ALG_TYPE_AHASH_MASK |
- crypto_requires_sync(algt->type,
- algt->mask));
+ CRYPTO_ALG_TYPE_AHASH_MASK | mask);
if (IS_ERR(poly))
return PTR_ERR(poly);
poly_hash = __crypto_hash_alg_common(poly);
@@ -613,10 +614,8 @@ static int chachapoly_create(struct crypto_template *tmpl, struct rtattr **tb,
if (err)
goto err_free_inst;
- crypto_set_skcipher_spawn(&ctx->chacha, aead_crypto_instance(inst));
- err = crypto_grab_skcipher(&ctx->chacha, chacha_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(&ctx->chacha, aead_crypto_instance(inst),
+ chacha_name, 0, mask);
if (err)
goto err_drop_poly;
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index 2c6649b10923..01a1f6aa30ac 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -421,8 +421,8 @@ static int cryptd_create_skcipher(struct crypto_template *tmpl,
ctx = skcipher_instance_ctx(inst);
ctx->queue = queue;
- crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
- err = crypto_grab_skcipher(&ctx->spawn, name, type, mask);
+ err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
+ name, type, mask);
if (err)
goto out_free_inst;
diff --git a/crypto/ctr.c b/crypto/ctr.c
index 1e9d6b86b3c6..c8076d9106a1 100644
--- a/crypto/ctr.c
+++ b/crypto/ctr.c
@@ -291,8 +291,8 @@ static int crypto_rfc3686_create(struct crypto_template *tmpl,
spawn = skcipher_instance_ctx(inst);
- crypto_set_skcipher_spawn(spawn, skcipher_crypto_instance(inst));
- err = crypto_grab_skcipher(spawn, cipher_name, 0, mask);
+ err = crypto_grab_skcipher(spawn, skcipher_crypto_instance(inst),
+ cipher_name, 0, mask);
if (err)
goto err_free_inst;
diff --git a/crypto/cts.c b/crypto/cts.c
index 6b6087dbb62a..b98c5a563346 100644
--- a/crypto/cts.c
+++ b/crypto/cts.c
@@ -332,6 +332,7 @@ static int crypto_cts_create(struct crypto_template *tmpl, struct rtattr **tb)
struct crypto_attr_type *algt;
struct skcipher_alg *alg;
const char *cipher_name;
+ u32 mask;
int err;
algt = crypto_get_attr_type(tb);
@@ -341,6 +342,8 @@ static int crypto_cts_create(struct crypto_template *tmpl, struct rtattr **tb)
if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
cipher_name = crypto_attr_alg_name(tb[1]);
if (IS_ERR(cipher_name))
return PTR_ERR(cipher_name);
@@ -351,10 +354,8 @@ static int crypto_cts_create(struct crypto_template *tmpl, struct rtattr **tb)
spawn = skcipher_instance_ctx(inst);
- crypto_set_skcipher_spawn(spawn, skcipher_crypto_instance(inst));
- err = crypto_grab_skcipher(spawn, cipher_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(spawn, skcipher_crypto_instance(inst),
+ cipher_name, 0, mask);
if (err)
goto err_free_inst;
diff --git a/crypto/essiv.c b/crypto/essiv.c
index e4b32c2ea7ec..2019250da08e 100644
--- a/crypto/essiv.c
+++ b/crypto/essiv.c
@@ -468,6 +468,7 @@ static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
struct shash_alg *hash_alg;
int ivsize;
u32 type;
+ u32 mask;
int err;
algt = crypto_get_attr_type(tb);
@@ -483,6 +484,7 @@ static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
return PTR_ERR(shash_name);
type = algt->type & algt->mask;
+ mask = crypto_requires_sync(algt->type, algt->mask);
switch (type) {
case CRYPTO_ALG_TYPE_SKCIPHER:
@@ -495,11 +497,8 @@ static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
ictx = crypto_instance_ctx(inst);
/* Symmetric cipher, e.g., "cbc(aes)" */
- crypto_set_skcipher_spawn(&ictx->u.skcipher_spawn, inst);
- err = crypto_grab_skcipher(&ictx->u.skcipher_spawn,
- inner_cipher_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(&ictx->u.skcipher_spawn, inst,
+ inner_cipher_name, 0, mask);
if (err)
goto out_free_inst;
skcipher_alg = crypto_spawn_skcipher_alg(&ictx->u.skcipher_spawn);
@@ -519,9 +518,7 @@ static int essiv_create(struct crypto_template *tmpl, struct rtattr **tb)
/* AEAD cipher, e.g., "authenc(hmac(sha256),cbc(aes))" */
crypto_set_aead_spawn(&ictx->u.aead_spawn, inst);
err = crypto_grab_aead(&ictx->u.aead_spawn,
- inner_cipher_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ inner_cipher_name, 0, mask);
if (err)
goto out_free_inst;
aead_alg = crypto_spawn_aead_alg(&ictx->u.aead_spawn);
diff --git a/crypto/gcm.c b/crypto/gcm.c
index 73884208f075..5a01b2b956f6 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -585,6 +585,7 @@ static int crypto_gcm_create_common(struct crypto_template *tmpl,
const char *ghash_name)
{
struct crypto_attr_type *algt;
+ u32 mask;
struct aead_instance *inst;
struct skcipher_alg *ctr;
struct crypto_alg *ghash_alg;
@@ -599,11 +600,11 @@ static int crypto_gcm_create_common(struct crypto_template *tmpl,
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
ghash_alg = crypto_find_alg(ghash_name, &crypto_ahash_type,
CRYPTO_ALG_TYPE_HASH,
- CRYPTO_ALG_TYPE_AHASH_MASK |
- crypto_requires_sync(algt->type,
- algt->mask));
+ CRYPTO_ALG_TYPE_AHASH_MASK | mask);
if (IS_ERR(ghash_alg))
return PTR_ERR(ghash_alg);
@@ -625,10 +626,8 @@ static int crypto_gcm_create_common(struct crypto_template *tmpl,
ghash->digestsize != 16)
goto err_drop_ghash;
- crypto_set_skcipher_spawn(&ctx->ctr, aead_crypto_instance(inst));
- err = crypto_grab_skcipher(&ctx->ctr, ctr_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(&ctx->ctr, aead_crypto_instance(inst),
+ ctr_name, 0, mask);
if (err)
goto err_drop_ghash;
diff --git a/crypto/lrw.c b/crypto/lrw.c
index be829f6afc8e..ae72f8ab1d9f 100644
--- a/crypto/lrw.c
+++ b/crypto/lrw.c
@@ -303,6 +303,7 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
struct skcipher_alg *alg;
const char *cipher_name;
char ecb_name[CRYPTO_MAX_ALG_NAME];
+ u32 mask;
int err;
algt = crypto_get_attr_type(tb);
@@ -312,6 +313,8 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
cipher_name = crypto_attr_alg_name(tb[1]);
if (IS_ERR(cipher_name))
return PTR_ERR(cipher_name);
@@ -322,19 +325,17 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
spawn = skcipher_instance_ctx(inst);
- crypto_set_skcipher_spawn(spawn, skcipher_crypto_instance(inst));
- err = crypto_grab_skcipher(spawn, cipher_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(spawn, skcipher_crypto_instance(inst),
+ cipher_name, 0, mask);
if (err == -ENOENT) {
err = -ENAMETOOLONG;
if (snprintf(ecb_name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
cipher_name) >= CRYPTO_MAX_ALG_NAME)
goto err_free_inst;
- err = crypto_grab_skcipher(spawn, ecb_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(spawn,
+ skcipher_crypto_instance(inst),
+ ecb_name, 0, mask);
}
if (err)
diff --git a/crypto/skcipher.c b/crypto/skcipher.c
index 37adb71f7759..e5083dccccdc 100644
--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -758,8 +758,10 @@ static const struct crypto_type crypto_skcipher_type = {
};
int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
- const char *name, u32 type, u32 mask)
+ struct crypto_instance *inst,
+ const char *name, u32 type, u32 mask)
{
+ spawn->base.inst = inst;
spawn->base.frontend = &crypto_skcipher_type;
return crypto_grab_spawn(&spawn->base, name, type, mask);
}
diff --git a/crypto/xts.c b/crypto/xts.c
index ab117633d64e..43e9048ba36b 100644
--- a/crypto/xts.c
+++ b/crypto/xts.c
@@ -361,20 +361,21 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
ctx = skcipher_instance_ctx(inst);
- crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
-
mask = crypto_requires_off(algt->type, algt->mask,
CRYPTO_ALG_NEED_FALLBACK |
CRYPTO_ALG_ASYNC);
- err = crypto_grab_skcipher(&ctx->spawn, cipher_name, 0, mask);
+ err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
+ cipher_name, 0, mask);
if (err == -ENOENT) {
err = -ENAMETOOLONG;
if (snprintf(ctx->name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
cipher_name) >= CRYPTO_MAX_ALG_NAME)
goto err_free_inst;
- err = crypto_grab_skcipher(&ctx->spawn, ctx->name, 0, mask);
+ err = crypto_grab_skcipher(&ctx->spawn,
+ skcipher_crypto_instance(inst),
+ ctx->name, 0, mask);
}
if (err)
diff --git a/include/crypto/internal/skcipher.h b/include/crypto/internal/skcipher.h
index ad4a6330ff53..b81cb4902abc 100644
--- a/include/crypto/internal/skcipher.h
+++ b/include/crypto/internal/skcipher.h
@@ -88,14 +88,9 @@ static inline void skcipher_request_complete(struct skcipher_request *req, int e
req->base.complete(&req->base, err);
}
-static inline void crypto_set_skcipher_spawn(
- struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst)
-{
- crypto_set_spawn(&spawn->base, inst);
-}
-
-int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
- u32 type, u32 mask);
+int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
+ struct crypto_instance *inst,
+ const char *name, u32 type, u32 mask);
static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
{
--
2.24.1
