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crypto: api - Add crypto_attr_alg2 helper

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This patch adds the helper crypto_attr_alg2 which is similar to
crypto_attr_alg but takes an extra frontend argument.  This is
intended to be used by new style algorithm types such as shash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2009-07-08 17:53:16 +08:00
parent 942969992d
commit d06854f024
4 changed files with 40 additions and 13 deletions
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8
crypto/algapi.c
View file

@ -644,7 +644,9 @@ const char *crypto_attr_alg_name(struct rtattr *rta)
} }
EXPORT_SYMBOL_GPL(crypto_attr_alg_name); EXPORT_SYMBOL_GPL(crypto_attr_alg_name);
struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask) struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
const struct crypto_type *frontend,
u32 type, u32 mask)
{ {
const char *name; const char *name;
int err; int err;
@ -654,9 +656,9 @@ struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask)
if (IS_ERR(name)) if (IS_ERR(name))
return ERR_PTR(err); return ERR_PTR(err);
return crypto_alg_mod_lookup(name, type, mask); return crypto_find_alg(name, frontend, type, mask);
} }
EXPORT_SYMBOL_GPL(crypto_attr_alg); EXPORT_SYMBOL_GPL(crypto_attr_alg2);
int crypto_attr_u32(struct rtattr *rta, u32 *num) int crypto_attr_u32(struct rtattr *rta, u32 *num)
{ {

31
crypto/api.c
View file

@ -503,6 +503,27 @@ void *crypto_create_tfm(struct crypto_alg *alg,
} }
EXPORT_SYMBOL_GPL(crypto_create_tfm); EXPORT_SYMBOL_GPL(crypto_create_tfm);
struct crypto_alg *crypto_find_alg(const char *alg_name,
const struct crypto_type *frontend,
u32 type, u32 mask)
{
struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask) =
crypto_alg_mod_lookup;
if (frontend) {
type &= frontend->maskclear;
mask &= frontend->maskclear;
type |= frontend->type;
mask |= frontend->maskset;
if (frontend->lookup)
lookup = frontend->lookup;
}
return lookup(alg_name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_find_alg);
/* /*
* crypto_alloc_tfm - Locate algorithm and allocate transform * crypto_alloc_tfm - Locate algorithm and allocate transform
* @alg_name: Name of algorithm * @alg_name: Name of algorithm
@ -526,21 +547,13 @@ EXPORT_SYMBOL_GPL(crypto_create_tfm);
void *crypto_alloc_tfm(const char *alg_name, void *crypto_alloc_tfm(const char *alg_name,
const struct crypto_type *frontend, u32 type, u32 mask) const struct crypto_type *frontend, u32 type, u32 mask)
{ {
struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
void *tfm; void *tfm;
int err; int err;
type &= frontend->maskclear;
mask &= frontend->maskclear;
type |= frontend->type;
mask |= frontend->maskset;
lookup = frontend->lookup ?: crypto_alg_mod_lookup;
for (;;) { for (;;) {
struct crypto_alg *alg; struct crypto_alg *alg;
alg = lookup(alg_name, type, mask); alg = crypto_find_alg(alg_name, frontend, type, mask);
if (IS_ERR(alg)) { if (IS_ERR(alg)) {
err = PTR_ERR(alg); err = PTR_ERR(alg);
goto err; goto err;

3
crypto/internal.h
View file

@ -106,6 +106,9 @@ struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
u32 mask); u32 mask);
void *crypto_create_tfm(struct crypto_alg *alg, void *crypto_create_tfm(struct crypto_alg *alg,
const struct crypto_type *frontend); const struct crypto_type *frontend);
struct crypto_alg *crypto_find_alg(const char *alg_name,
const struct crypto_type *frontend,
u32 type, u32 mask);
void *crypto_alloc_tfm(const char *alg_name, void *crypto_alloc_tfm(const char *alg_name,
const struct crypto_type *frontend, u32 type, u32 mask); const struct crypto_type *frontend, u32 type, u32 mask);

11
include/crypto/algapi.h
View file

@ -136,7 +136,16 @@ static inline void crypto_set_spawn(struct crypto_spawn *spawn,
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
int crypto_check_attr_type(struct rtattr **tb, u32 type); int crypto_check_attr_type(struct rtattr **tb, u32 type);
const char *crypto_attr_alg_name(struct rtattr *rta); const char *crypto_attr_alg_name(struct rtattr *rta);
struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask); struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
const struct crypto_type *frontend,
u32 type, u32 mask);
static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
u32 type, u32 mask)
{
return crypto_attr_alg2(rta, NULL, type, mask);
}
int crypto_attr_u32(struct rtattr *rta, u32 *num); int crypto_attr_u32(struct rtattr *rta, u32 *num);
void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
unsigned int head); unsigned int head);