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authorEric Biggers <ebiggers@google.com>2020-01-02 19:58:45 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2020-01-09 11:30:54 +0800
commitb9f76dddb1f9f70e008b982381bbc9a67c9b8c66 (patch)
tree329d8484b8eace9777db4e9965b02372c79e1a9f
parent77f7e94d72208a1a84c88ed4de16a9bf368e9ded (diff)
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crypto: skcipher - pass instance to crypto_grab_skcipher()
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@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/adiantum.c11
-rw-r--r--crypto/authenc.c12
-rw-r--r--crypto/authencesn.c12
-rw-r--r--crypto/ccm.c9
-rw-r--r--crypto/chacha20poly1305.c13
-rw-r--r--crypto/cryptd.c4
-rw-r--r--crypto/ctr.c4
-rw-r--r--crypto/cts.c9
-rw-r--r--crypto/essiv.c13
-rw-r--r--crypto/gcm.c13
-rw-r--r--crypto/lrw.c15
-rw-r--r--crypto/skcipher.c4
-rw-r--r--crypto/xts.c9
-rw-r--r--include/crypto/internal/skcipher.h11
14 files changed, 68 insertions, 71 deletions
diff --git a/crypto/adiantum.c b/crypto/adiantum.c
index 30cffb45b88f..567071464fab 100644
--- a/crypto/adiantum.c
+++ b/crypto/adiantum.c
@@ -493,6 +493,7 @@ 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;
@@ -511,6 +512,8 @@ 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);
@@ -531,11 +534,9 @@ 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 15aaddd34171..e31bcec58564 100644
--- a/crypto/authenc.c
+++ b/crypto/authenc.c
@@ -373,6 +373,7 @@ 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;
@@ -388,9 +389,10 @@ 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);
@@ -413,10 +415,8 @@ 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 fc81324ce881..83bda7f905bb 100644
--- a/crypto/authencesn.c
+++ b/crypto/authencesn.c
@@ -391,6 +391,7 @@ 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;
@@ -406,9 +407,10 @@ 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);
@@ -431,10 +433,8 @@ 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 44104524e95a..4414f0ddfe5a 100644
--- a/crypto/ccm.c
+++ b/crypto/ccm.c
@@ -450,6 +450,7 @@ 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;
@@ -464,6 +465,8 @@ 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 |
@@ -488,10 +491,8 @@ 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 88cbdaba43b8..09d5a34ab339 100644
--- a/crypto/chacha20poly1305.c
+++ b/crypto/chacha20poly1305.c
@@ -558,6 +558,7 @@ 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;
@@ -576,6 +577,8 @@ 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);
@@ -585,9 +588,7 @@ 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);
@@ -608,10 +609,8 @@ 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 cd94243a1605..a0fe10624cfd 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -416,8 +416,8 @@ 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 b63b19de68a9..a8feab621c6c 100644
--- a/crypto/ctr.c
+++ b/crypto/ctr.c
@@ -286,8 +286,8 @@ 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 a0bb994f8b11..48188adc8e91 100644
--- a/crypto/cts.c
+++ b/crypto/cts.c
@@ -328,6 +328,7 @@ 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);
@@ -337,6 +338,8 @@ 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);
@@ -347,10 +350,8 @@ 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 61d9000ae4ad..0e45f5b4f67f 100644
--- a/crypto/essiv.c
+++ b/crypto/essiv.c
@@ -452,6 +452,7 @@ 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);
@@ -467,6 +468,7 @@ 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:
@@ -479,11 +481,8 @@ 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);
@@ -503,9 +502,7 @@ 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 7041cb1b6fd5..887f472734b6 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -580,6 +580,7 @@ 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;
@@ -594,11 +595,11 @@ 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);
@@ -620,10 +621,8 @@ 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 8ebd79276c78..63c485c0d8a6 100644
--- a/crypto/lrw.c
+++ b/crypto/lrw.c
@@ -301,6 +301,7 @@ 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);
@@ -310,6 +311,8 @@ 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);
@@ -320,19 +323,17 @@ 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 89137a197fc8..8759d473a154 100644
--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -747,8 +747,10 @@ 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 19d55489e78b..29efa15f1495 100644
--- a/crypto/xts.c
+++ b/crypto/xts.c
@@ -355,20 +355,21 @@ 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 df4fdeaa13f3..e387424f6247 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)
{