KEYS: Remove key_type::match in favour of overriding default by match_preparse
A previous patch added a ->match_preparse() method to the key type. This is allowed to override the function called by the iteration algorithm. Therefore, we can just set a default that simply checks for an exact match of the key description with the original criterion data and allow match_preparse to override it as needed. The key_type::match op is then redundant and can be removed, as can the user_match() function. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
This commit is contained in:
parent
614d8c3901
commit
c06cfb08b8
@ -59,8 +59,8 @@ EXPORT_SYMBOL_GPL(asymmetric_keyid_match);
|
||||
* "id:<id>" - request a key matching the ID
|
||||
* "<subtype>:<id>" - request a key of a subtype
|
||||
*/
|
||||
static int asymmetric_key_match(const struct key *key,
|
||||
const struct key_match_data *match_data)
|
||||
static int asymmetric_key_cmp(const struct key *key,
|
||||
const struct key_match_data *match_data)
|
||||
{
|
||||
const struct asymmetric_key_subtype *subtype = asymmetric_key_subtype(key);
|
||||
const char *description = match_data->raw_data;
|
||||
@ -110,6 +110,7 @@ static int asymmetric_key_match(const struct key *key,
|
||||
static int asymmetric_key_match_preparse(struct key_match_data *match_data)
|
||||
{
|
||||
match_data->lookup_type = KEYRING_SEARCH_LOOKUP_ITERATE;
|
||||
match_data->cmp = asymmetric_key_cmp;
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -224,7 +225,6 @@ struct key_type key_type_asymmetric = {
|
||||
.free_preparse = asymmetric_key_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.match_preparse = asymmetric_key_match_preparse,
|
||||
.match = asymmetric_key_match,
|
||||
.match_free = asymmetric_key_match_free,
|
||||
.destroy = asymmetric_key_destroy,
|
||||
.describe = asymmetric_key_describe,
|
||||
|
@ -75,7 +75,6 @@ static struct key_type key_type_pkcs7 = {
|
||||
.preparse = pkcs7_preparse,
|
||||
.free_preparse = user_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.match = user_match,
|
||||
.revoke = user_revoke,
|
||||
.destroy = user_destroy,
|
||||
.describe = user_describe,
|
||||
|
@ -62,7 +62,6 @@ cifs_spnego_key_destroy(struct key *key)
|
||||
struct key_type cifs_spnego_key_type = {
|
||||
.name = "cifs.spnego",
|
||||
.instantiate = cifs_spnego_key_instantiate,
|
||||
.match = user_match,
|
||||
.destroy = cifs_spnego_key_destroy,
|
||||
.describe = user_describe,
|
||||
};
|
||||
|
@ -84,7 +84,6 @@ static struct key_type cifs_idmap_key_type = {
|
||||
.instantiate = cifs_idmap_key_instantiate,
|
||||
.destroy = cifs_idmap_key_destroy,
|
||||
.describe = user_describe,
|
||||
.match = user_match,
|
||||
};
|
||||
|
||||
static char *
|
||||
|
@ -177,7 +177,6 @@ static struct key_type key_type_id_resolver = {
|
||||
.preparse = user_preparse,
|
||||
.free_preparse = user_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.match = user_match,
|
||||
.revoke = user_revoke,
|
||||
.destroy = user_destroy,
|
||||
.describe = user_describe,
|
||||
@ -401,7 +400,6 @@ static struct key_type key_type_id_resolver_legacy = {
|
||||
.preparse = user_preparse,
|
||||
.free_preparse = user_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.match = user_match,
|
||||
.revoke = user_revoke,
|
||||
.destroy = user_destroy,
|
||||
.describe = user_describe,
|
||||
|
@ -36,13 +36,10 @@ extern struct key_type key_type_user;
|
||||
extern struct key_type key_type_logon;
|
||||
|
||||
struct key_preparsed_payload;
|
||||
struct key_match_data;
|
||||
|
||||
extern int user_preparse(struct key_preparsed_payload *prep);
|
||||
extern void user_free_preparse(struct key_preparsed_payload *prep);
|
||||
extern int user_update(struct key *key, struct key_preparsed_payload *prep);
|
||||
extern int user_match(const struct key *key,
|
||||
const struct key_match_data *match_data);
|
||||
extern void user_revoke(struct key *key);
|
||||
extern void user_destroy(struct key *key);
|
||||
extern void user_describe(const struct key *user, struct seq_file *m);
|
||||
|
@ -113,10 +113,6 @@ struct key_type {
|
||||
*/
|
||||
int (*match_preparse)(struct key_match_data *match_data);
|
||||
|
||||
/* match a key against a description */
|
||||
int (*match)(const struct key *key,
|
||||
const struct key_match_data *match_data);
|
||||
|
||||
/* Free preparsed match data (optional). This should be supplied it
|
||||
* ->match_preparse() is supplied. */
|
||||
void (*match_free)(struct key_match_data *match_data);
|
||||
|
@ -476,7 +476,6 @@ struct key_type key_type_ceph = {
|
||||
.preparse = ceph_key_preparse,
|
||||
.free_preparse = ceph_key_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.match = user_match,
|
||||
.destroy = ceph_key_destroy,
|
||||
};
|
||||
|
||||
|
@ -176,9 +176,8 @@ static void dns_resolver_free_preparse(struct key_preparsed_payload *prep)
|
||||
* The domain name may be a simple name or an absolute domain name (which
|
||||
* should end with a period). The domain name is case-independent.
|
||||
*/
|
||||
static int
|
||||
dns_resolver_match(const struct key *key,
|
||||
const struct key_match_data *match_data)
|
||||
static int dns_resolver_cmp(const struct key *key,
|
||||
const struct key_match_data *match_data)
|
||||
{
|
||||
int slen, dlen, ret = 0;
|
||||
const char *src = key->description, *dsp = match_data->raw_data;
|
||||
@ -209,6 +208,16 @@ no_match:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Preparse the match criterion.
|
||||
*/
|
||||
static int dns_resolver_match_preparse(struct key_match_data *match_data)
|
||||
{
|
||||
match_data->lookup_type = KEYRING_SEARCH_LOOKUP_ITERATE;
|
||||
match_data->cmp = dns_resolver_cmp;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Describe a DNS key
|
||||
*/
|
||||
@ -243,7 +252,7 @@ struct key_type key_type_dns_resolver = {
|
||||
.preparse = dns_resolver_preparse,
|
||||
.free_preparse = dns_resolver_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.match = dns_resolver_match,
|
||||
.match_preparse = dns_resolver_match_preparse,
|
||||
.revoke = user_revoke,
|
||||
.destroy = user_destroy,
|
||||
.describe = dns_resolver_describe,
|
||||
|
@ -44,7 +44,6 @@ struct key_type key_type_rxrpc = {
|
||||
.preparse = rxrpc_preparse,
|
||||
.free_preparse = rxrpc_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.match = user_match,
|
||||
.destroy = rxrpc_destroy,
|
||||
.describe = rxrpc_describe,
|
||||
.read = rxrpc_read,
|
||||
@ -61,7 +60,6 @@ struct key_type key_type_rxrpc_s = {
|
||||
.preparse = rxrpc_preparse_s,
|
||||
.free_preparse = rxrpc_free_preparse_s,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.match = user_match,
|
||||
.destroy = rxrpc_destroy_s,
|
||||
.describe = rxrpc_describe,
|
||||
};
|
||||
|
@ -36,7 +36,6 @@ struct key_type key_type_big_key = {
|
||||
.preparse = big_key_preparse,
|
||||
.free_preparse = big_key_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.match = user_match,
|
||||
.revoke = big_key_revoke,
|
||||
.destroy = big_key_destroy,
|
||||
.describe = big_key_describe,
|
||||
|
@ -970,7 +970,6 @@ struct key_type key_type_encrypted = {
|
||||
.name = "encrypted",
|
||||
.instantiate = encrypted_instantiate,
|
||||
.update = encrypted_update,
|
||||
.match = user_match,
|
||||
.destroy = encrypted_destroy,
|
||||
.describe = user_describe,
|
||||
.read = encrypted_read,
|
||||
|
@ -127,6 +127,8 @@ struct keyring_search_context {
|
||||
struct timespec now;
|
||||
};
|
||||
|
||||
extern int key_default_cmp(const struct key *key,
|
||||
const struct key_match_data *match_data);
|
||||
extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
|
||||
struct keyring_search_context *ctx);
|
||||
|
||||
|
@ -799,7 +799,7 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
|
||||
}
|
||||
|
||||
key_ref = ERR_PTR(-EINVAL);
|
||||
if (!index_key.type->match || !index_key.type->instantiate ||
|
||||
if (!index_key.type->instantiate ||
|
||||
(!index_key.description && !index_key.type->preparse))
|
||||
goto error_put_type;
|
||||
|
||||
|
@ -89,7 +89,6 @@ struct key_type key_type_keyring = {
|
||||
.preparse = keyring_preparse,
|
||||
.free_preparse = keyring_free_preparse,
|
||||
.instantiate = keyring_instantiate,
|
||||
.match = user_match,
|
||||
.revoke = keyring_revoke,
|
||||
.destroy = keyring_destroy,
|
||||
.describe = keyring_describe,
|
||||
@ -511,6 +510,15 @@ struct key *keyring_alloc(const char *description, kuid_t uid, kgid_t gid,
|
||||
}
|
||||
EXPORT_SYMBOL(keyring_alloc);
|
||||
|
||||
/*
|
||||
* By default, we keys found by getting an exact match on their descriptions.
|
||||
*/
|
||||
int key_default_cmp(const struct key *key,
|
||||
const struct key_match_data *match_data)
|
||||
{
|
||||
return strcmp(key->description, match_data->raw_data) == 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Iteration function to consider each key found.
|
||||
*/
|
||||
@ -884,7 +892,7 @@ key_ref_t keyring_search(key_ref_t keyring,
|
||||
.index_key.type = type,
|
||||
.index_key.description = description,
|
||||
.cred = current_cred(),
|
||||
.match_data.cmp = type->match,
|
||||
.match_data.cmp = key_default_cmp,
|
||||
.match_data.raw_data = description,
|
||||
.match_data.lookup_type = KEYRING_SEARCH_LOOKUP_DIRECT,
|
||||
.flags = KEYRING_SEARCH_DO_STATE_CHECK,
|
||||
@ -892,9 +900,6 @@ key_ref_t keyring_search(key_ref_t keyring,
|
||||
key_ref_t key;
|
||||
int ret;
|
||||
|
||||
if (!ctx.match_data.cmp)
|
||||
return ERR_PTR(-ENOKEY);
|
||||
|
||||
if (type->match_preparse) {
|
||||
ret = type->match_preparse(&ctx.match_data);
|
||||
if (ret < 0)
|
||||
|
@ -531,7 +531,7 @@ struct key *request_key_and_link(struct key_type *type,
|
||||
.index_key.type = type,
|
||||
.index_key.description = description,
|
||||
.cred = current_cred(),
|
||||
.match_data.cmp = type->match,
|
||||
.match_data.cmp = key_default_cmp,
|
||||
.match_data.raw_data = description,
|
||||
.match_data.lookup_type = KEYRING_SEARCH_LOOKUP_DIRECT,
|
||||
};
|
||||
|
@ -246,7 +246,7 @@ struct key *key_get_instantiation_authkey(key_serial_t target_id)
|
||||
.index_key.type = &key_type_request_key_auth,
|
||||
.index_key.description = description,
|
||||
.cred = current_cred(),
|
||||
.match_data.cmp = user_match,
|
||||
.match_data.cmp = key_default_cmp,
|
||||
.match_data.raw_data = description,
|
||||
.match_data.lookup_type = KEYRING_SEARCH_LOOKUP_DIRECT,
|
||||
};
|
||||
|
@ -1096,7 +1096,6 @@ struct key_type key_type_trusted = {
|
||||
.name = "trusted",
|
||||
.instantiate = trusted_instantiate,
|
||||
.update = trusted_update,
|
||||
.match = user_match,
|
||||
.destroy = trusted_destroy,
|
||||
.describe = user_describe,
|
||||
.read = trusted_read,
|
||||
|
@ -30,7 +30,6 @@ struct key_type key_type_user = {
|
||||
.free_preparse = user_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.update = user_update,
|
||||
.match = user_match,
|
||||
.revoke = user_revoke,
|
||||
.destroy = user_destroy,
|
||||
.describe = user_describe,
|
||||
@ -51,7 +50,6 @@ struct key_type key_type_logon = {
|
||||
.free_preparse = user_free_preparse,
|
||||
.instantiate = generic_key_instantiate,
|
||||
.update = user_update,
|
||||
.match = user_match,
|
||||
.revoke = user_revoke,
|
||||
.destroy = user_destroy,
|
||||
.describe = user_describe,
|
||||
@ -136,16 +134,6 @@ error:
|
||||
|
||||
EXPORT_SYMBOL_GPL(user_update);
|
||||
|
||||
/*
|
||||
* match users on their name
|
||||
*/
|
||||
int user_match(const struct key *key, const struct key_match_data *match_data)
|
||||
{
|
||||
return strcmp(key->description, match_data->raw_data) == 0;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(user_match);
|
||||
|
||||
/*
|
||||
* dispose of the links from a revoked keyring
|
||||
* - called with the key sem write-locked
|
||||
|
Loading…
Reference in New Issue
Block a user