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authorHerbert Xu <herbert@gondor.apana.org.au>2007-08-29 19:27:26 +0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:55:40 -0700
commit39e1ee011f42dbbcb0210c73ea728ae54cf63b06 (patch)
tree0689571972f9678f93cec8bd7f3dac2934c5bc59 /crypto/cryptomgr.c
parent1ae978208e2ee9ba1b01d309164bc5e590cd242d (diff)
[CRYPTO] api: Add support for multiple template parameters
This patch adds support for having multiple parameters to a template, separated by a comma. It also adds support for integer parameters in addition to the current algorithm parameter type. This will be used by the authenc template which will have four parameters: the authentication algorithm, the encryption algorithm, the authentication size and the encryption key length. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/cryptomgr.c')
-rw-r--r--crypto/cryptomgr.c95
1 files changed, 70 insertions, 25 deletions
diff --git a/crypto/cryptomgr.c b/crypto/cryptomgr.c
index e5fb7cca510..c83884fec5f 100644
--- a/crypto/cryptomgr.c
+++ b/crypto/cryptomgr.c
@@ -24,22 +24,26 @@
#include "internal.h"
struct cryptomgr_param {
- struct rtattr *tb[CRYPTOA_MAX];
+ struct rtattr *tb[CRYPTO_MAX_ATTRS + 2];
struct {
struct rtattr attr;
struct crypto_attr_type data;
} type;
- struct {
+ union {
struct rtattr attr;
- struct crypto_attr_alg data;
- } alg;
-
- struct {
- char name[CRYPTO_MAX_ALG_NAME];
- } larval;
-
+ struct {
+ struct rtattr attr;
+ struct crypto_attr_alg data;
+ } alg;
+ struct {
+ struct rtattr attr;
+ struct crypto_attr_u32 data;
+ } nu32;
+ } attrs[CRYPTO_MAX_ATTRS];
+
+ char larval[CRYPTO_MAX_ALG_NAME];
char template[CRYPTO_MAX_ALG_NAME];
};
@@ -72,7 +76,7 @@ out:
module_put_and_exit(0);
err:
- crypto_larval_error(param->larval.name, param->type.data.type,
+ crypto_larval_error(param->larval, param->type.data.type,
param->type.data.mask);
goto out;
}
@@ -84,6 +88,7 @@ static int cryptomgr_schedule_probe(struct crypto_larval *larval)
const char *name = larval->alg.cra_name;
const char *p;
unsigned int len;
+ int i;
if (!try_module_get(THIS_MODULE))
goto err;
@@ -101,33 +106,73 @@ static int cryptomgr_schedule_probe(struct crypto_larval *larval)
memcpy(param->template, name, len);
- name = p + 1;
- len = 0;
- for (p = name; *p; p++) {
- for (; isalnum(*p) || *p == '-' || *p == '_' || *p == '('; p++)
- ;
+ i = 0;
+ for (;;) {
+ int notnum = 0;
- if (*p != ')')
- goto err_free_param;
+ name = ++p;
+ len = 0;
+
+ for (; isalnum(*p) || *p == '-' || *p == '_'; p++)
+ notnum |= !isdigit(*p);
+
+ if (*p == '(') {
+ int recursion = 0;
+
+ for (;;) {
+ if (!*++p)
+ goto err_free_param;
+ if (*p == '(')
+ recursion++;
+ else if (*p == ')' && !recursion--)
+ break;
+ }
+
+ notnum = 1;
+ }
len = p - name;
+ if (!len)
+ goto err_free_param;
+
+ if (notnum) {
+ param->attrs[i].alg.attr.rta_len =
+ sizeof(param->attrs[i].alg);
+ param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG;
+ memcpy(param->attrs[i].alg.data.name, name, len);
+ } else {
+ param->attrs[i].nu32.attr.rta_len =
+ sizeof(param->attrs[i].nu32);
+ param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32;
+ param->attrs[i].nu32.data.num =
+ simple_strtol(name, NULL, 0);
+ }
+
+ param->tb[i + 1] = &param->attrs[i].attr;
+ i++;
+
+ if (WARN_ON(i >= CRYPTO_MAX_ATTRS))
+ goto err_free_param;
+
+ if (*p == ')')
+ break;
+
+ if (*p != ',')
+ goto err_free_param;
}
- if (!len || name[len + 1])
+ if (!i)
goto err_free_param;
+ param->tb[i + 1] = NULL;
+
param->type.attr.rta_len = sizeof(param->type);
param->type.attr.rta_type = CRYPTOA_TYPE;
param->type.data.type = larval->alg.cra_flags;
param->type.data.mask = larval->mask;
- param->tb[CRYPTOA_TYPE - 1] = &param->type.attr;
-
- param->alg.attr.rta_len = sizeof(param->alg);
- param->alg.attr.rta_type = CRYPTOA_ALG;
- memcpy(param->alg.data.name, name, len);
- param->tb[CRYPTOA_ALG - 1] = &param->alg.attr;
+ param->tb[0] = &param->type.attr;
- memcpy(param->larval.name, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME);
+ memcpy(param->larval, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME);
thread = kthread_run(cryptomgr_probe, param, "cryptomgr");
if (IS_ERR(thread))