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-rw-r--r--crypto/api.c52
-rw-r--r--crypto/internal.h6
-rw-r--r--crypto/proc.c6
-rw-r--r--include/linux/crypto.h5
4 files changed, 60 insertions, 9 deletions
diff --git a/crypto/api.c b/crypto/api.c
index 40ae42e9b6a6..2715afdf678c 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -3,6 +3,7 @@
*
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
* Copyright (c) 2002 David S. Miller (davem@redhat.com)
+ * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
*
* Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no>
* and Nettle, by Niels Möller.
@@ -18,9 +19,11 @@
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/errno.h>
+#include <linux/kernel.h>
#include <linux/kmod.h>
#include <linux/rwsem.h>
#include <linux/slab.h>
+#include <linux/string.h>
#include "internal.h"
LIST_HEAD(crypto_alg_list);
@@ -39,6 +42,7 @@ static inline void crypto_alg_put(struct crypto_alg *alg)
static struct crypto_alg *crypto_alg_lookup(const char *name)
{
struct crypto_alg *q, *alg = NULL;
+ int best = -1;
if (!name)
return NULL;
@@ -46,11 +50,23 @@ static struct crypto_alg *crypto_alg_lookup(const char *name)
down_read(&crypto_alg_sem);
list_for_each_entry(q, &crypto_alg_list, cra_list) {
- if (!(strcmp(q->cra_name, name))) {
- if (crypto_alg_get(q))
- alg = q;
+ int exact, fuzzy;
+
+ exact = !strcmp(q->cra_driver_name, name);
+ fuzzy = !strcmp(q->cra_name, name);
+ if (!exact && !(fuzzy && q->cra_priority > best))
+ continue;
+
+ if (unlikely(!crypto_alg_get(q)))
+ continue;
+
+ best = q->cra_priority;
+ if (alg)
+ crypto_alg_put(alg);
+ alg = q;
+
+ if (exact)
break;
- }
}
up_read(&crypto_alg_sem);
@@ -207,9 +223,26 @@ void crypto_free_tfm(struct crypto_tfm *tfm)
kfree(tfm);
}
+static inline int crypto_set_driver_name(struct crypto_alg *alg)
+{
+ static const char suffix[] = "-generic";
+ char *driver_name = (char *)alg->cra_driver_name;
+ int len;
+
+ if (*driver_name)
+ return 0;
+
+ len = strlcpy(driver_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
+ if (len + sizeof(suffix) > CRYPTO_MAX_ALG_NAME)
+ return -ENAMETOOLONG;
+
+ memcpy(driver_name + len, suffix, sizeof(suffix));
+ return 0;
+}
+
int crypto_register_alg(struct crypto_alg *alg)
{
- int ret = 0;
+ int ret;
struct crypto_alg *q;
if (alg->cra_alignmask & (alg->cra_alignmask + 1))
@@ -220,11 +253,18 @@ int crypto_register_alg(struct crypto_alg *alg)
if (alg->cra_blocksize > PAGE_SIZE)
return -EINVAL;
+
+ if (alg->cra_priority < 0)
+ return -EINVAL;
+ ret = crypto_set_driver_name(alg);
+ if (unlikely(ret))
+ return ret;
+
down_write(&crypto_alg_sem);
list_for_each_entry(q, &crypto_alg_list, cra_list) {
- if (!(strcmp(q->cra_name, alg->cra_name))) {
+ if (!strcmp(q->cra_driver_name, alg->cra_driver_name)) {
ret = -EEXIST;
goto out;
}
diff --git a/crypto/internal.h b/crypto/internal.h
index 37aa652ce5ce..959e602909a6 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -2,6 +2,7 @@
* Cryptographic API.
*
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
@@ -16,10 +17,15 @@
#include <linux/highmem.h>
#include <linux/interrupt.h>
#include <linux/init.h>
+#include <linux/list.h>
#include <linux/kernel.h>
+#include <linux/rwsem.h>
#include <linux/slab.h>
#include <asm/kmap_types.h>
+extern struct list_head crypto_alg_list;
+extern struct rw_semaphore crypto_alg_sem;
+
extern enum km_type crypto_km_types[];
static inline enum km_type crypto_kmap_type(int out)
diff --git a/crypto/proc.c b/crypto/proc.c
index 630ba91c08f1..c0a5dd7ce2cc 100644
--- a/crypto/proc.c
+++ b/crypto/proc.c
@@ -4,6 +4,7 @@
* Procfs information.
*
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
@@ -18,9 +19,6 @@
#include <linux/seq_file.h>
#include "internal.h"
-extern struct list_head crypto_alg_list;
-extern struct rw_semaphore crypto_alg_sem;
-
static void *c_start(struct seq_file *m, loff_t *pos)
{
struct list_head *v;
@@ -53,7 +51,9 @@ static int c_show(struct seq_file *m, void *p)
struct crypto_alg *alg = (struct crypto_alg *)p;
seq_printf(m, "name : %s\n", alg->cra_name);
+ seq_printf(m, "driver : %s\n", alg->cra_driver_name);
seq_printf(m, "module : %s\n", module_name(alg->cra_module));
+ seq_printf(m, "priority : %d\n", alg->cra_priority);
switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
case CRYPTO_ALG_TYPE_CIPHER:
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 3c89df6e7768..d88bf8aa8b47 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -3,6 +3,7 @@
*
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
* Copyright (c) 2002 David S. Miller (davem@redhat.com)
+ * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
*
* Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no>
* and Nettle, by Niels Möller.
@@ -126,7 +127,11 @@ struct crypto_alg {
unsigned int cra_blocksize;
unsigned int cra_ctxsize;
unsigned int cra_alignmask;
+
+ int cra_priority;
+
const char cra_name[CRYPTO_MAX_ALG_NAME];
+ const char cra_driver_name[CRYPTO_MAX_ALG_NAME];
union {
struct cipher_alg cipher;