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authorJan Glauber <jan.glauber@de.ibm.com>2006-01-14 13:20:53 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-14 18:27:08 -0800
commitc1357833bf5d92b1bda41215ae88a6597664251b (patch)
tree986dafb9463c0f5764cd511defbd2650a66c3f68 /arch/s390/crypto
parent7aa89746e89fca8fc722485aaf4454f2b636cf4d (diff)
downloadlinux-linaro-stable-c1357833bf5d92b1bda41215ae88a6597664251b.tar.gz
[PATCH] s390: des crypto code cleanup
Beautify the s390 in-kernel-crypto des code. Signed-off-by: Jan Glauber <jan.glauber@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/s390/crypto')
-rw-r--r--arch/s390/crypto/des_s390.c155
1 files changed, 67 insertions, 88 deletions
diff --git a/arch/s390/crypto/des_s390.c b/arch/s390/crypto/des_s390.c
index a38bb2a3eef6..f090c3c2745b 100644
--- a/arch/s390/crypto/des_s390.c
+++ b/arch/s390/crypto/des_s390.c
@@ -15,10 +15,8 @@
*/
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <asm/scatterlist.h>
#include <linux/crypto.h>
+
#include "crypt_s390.h"
#include "crypto_des.h"
@@ -46,37 +44,30 @@ struct crypt_s390_des3_192_ctx {
u8 key[DES3_192_KEY_SIZE];
};
-static int
-des_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
+static int des_setkey(void *ctx, const u8 *key, unsigned int keylen,
+ u32 *flags)
{
- struct crypt_s390_des_ctx *dctx;
+ struct crypt_s390_des_ctx *dctx = ctx;
int ret;
- dctx = ctx;
- //test if key is valid (not a weak key)
+ /* test if key is valid (not a weak key) */
ret = crypto_des_check_key(key, keylen, flags);
- if (ret == 0){
+ if (ret == 0)
memcpy(dctx->key, key, keylen);
- }
return ret;
}
-
-static void
-des_encrypt(void *ctx, u8 *dst, const u8 *src)
+static void des_encrypt(void *ctx, u8 *dst, const u8 *src)
{
- struct crypt_s390_des_ctx *dctx;
+ struct crypt_s390_des_ctx *dctx = ctx;
- dctx = ctx;
crypt_s390_km(KM_DEA_ENCRYPT, dctx->key, dst, src, DES_BLOCK_SIZE);
}
-static void
-des_decrypt(void *ctx, u8 *dst, const u8 *src)
+static void des_decrypt(void *ctx, u8 *dst, const u8 *src)
{
- struct crypt_s390_des_ctx *dctx;
+ struct crypt_s390_des_ctx *dctx = ctx;
- dctx = ctx;
crypt_s390_km(KM_DEA_DECRYPT, dctx->key, dst, src, DES_BLOCK_SIZE);
}
@@ -87,12 +78,15 @@ static struct crypto_alg des_alg = {
.cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(des_alg.cra_list),
- .cra_u = { .cipher = {
- .cia_min_keysize = DES_KEY_SIZE,
- .cia_max_keysize = DES_KEY_SIZE,
- .cia_setkey = des_setkey,
- .cia_encrypt = des_encrypt,
- .cia_decrypt = des_decrypt } }
+ .cra_u = {
+ .cipher = {
+ .cia_min_keysize = DES_KEY_SIZE,
+ .cia_max_keysize = DES_KEY_SIZE,
+ .cia_setkey = des_setkey,
+ .cia_encrypt = des_encrypt,
+ .cia_decrypt = des_decrypt
+ }
+ }
};
/*
@@ -107,20 +101,18 @@ static struct crypto_alg des_alg = {
* Implementers MUST reject keys that exhibit this property.
*
*/
-static int
-des3_128_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
+static int des3_128_setkey(void *ctx, const u8 *key, unsigned int keylen,
+ u32 *flags)
{
int i, ret;
- struct crypt_s390_des3_128_ctx *dctx;
+ struct crypt_s390_des3_128_ctx *dctx = ctx;
const u8* temp_key = key;
- dctx = ctx;
if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE))) {
-
*flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
return -EINVAL;
}
- for (i = 0; i < 2; i++, temp_key += DES_KEY_SIZE) {
+ for (i = 0; i < 2; i++, temp_key += DES_KEY_SIZE) {
ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
if (ret < 0)
return ret;
@@ -129,24 +121,20 @@ des3_128_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
return 0;
}
-static void
-des3_128_encrypt(void *ctx, u8 *dst, const u8 *src)
+static void des3_128_encrypt(void *ctx, u8 *dst, const u8 *src)
{
- struct crypt_s390_des3_128_ctx *dctx;
+ struct crypt_s390_des3_128_ctx *dctx = ctx;
- dctx = ctx;
crypt_s390_km(KM_TDEA_128_ENCRYPT, dctx->key, dst, (void*)src,
- DES3_128_BLOCK_SIZE);
+ DES3_128_BLOCK_SIZE);
}
-static void
-des3_128_decrypt(void *ctx, u8 *dst, const u8 *src)
+static void des3_128_decrypt(void *ctx, u8 *dst, const u8 *src)
{
- struct crypt_s390_des3_128_ctx *dctx;
+ struct crypt_s390_des3_128_ctx *dctx = ctx;
- dctx = ctx;
crypt_s390_km(KM_TDEA_128_DECRYPT, dctx->key, dst, (void*)src,
- DES3_128_BLOCK_SIZE);
+ DES3_128_BLOCK_SIZE);
}
static struct crypto_alg des3_128_alg = {
@@ -156,12 +144,15 @@ static struct crypto_alg des3_128_alg = {
.cra_ctxsize = sizeof(struct crypt_s390_des3_128_ctx),
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(des3_128_alg.cra_list),
- .cra_u = { .cipher = {
- .cia_min_keysize = DES3_128_KEY_SIZE,
- .cia_max_keysize = DES3_128_KEY_SIZE,
- .cia_setkey = des3_128_setkey,
- .cia_encrypt = des3_128_encrypt,
- .cia_decrypt = des3_128_decrypt } }
+ .cra_u = {
+ .cipher = {
+ .cia_min_keysize = DES3_128_KEY_SIZE,
+ .cia_max_keysize = DES3_128_KEY_SIZE,
+ .cia_setkey = des3_128_setkey,
+ .cia_encrypt = des3_128_encrypt,
+ .cia_decrypt = des3_128_decrypt
+ }
+ }
};
/*
@@ -177,50 +168,43 @@ static struct crypto_alg des3_128_alg = {
* property.
*
*/
-static int
-des3_192_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
+static int des3_192_setkey(void *ctx, const u8 *key, unsigned int keylen,
+ u32 *flags)
{
int i, ret;
- struct crypt_s390_des3_192_ctx *dctx;
- const u8* temp_key;
+ struct crypt_s390_des3_192_ctx *dctx = ctx;
+ const u8* temp_key = key;
- dctx = ctx;
- temp_key = key;
if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
- DES_KEY_SIZE))) {
+ DES_KEY_SIZE))) {
*flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
return -EINVAL;
}
for (i = 0; i < 3; i++, temp_key += DES_KEY_SIZE) {
ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
- if (ret < 0){
+ if (ret < 0)
return ret;
- }
}
memcpy(dctx->key, key, keylen);
return 0;
}
-static void
-des3_192_encrypt(void *ctx, u8 *dst, const u8 *src)
+static void des3_192_encrypt(void *ctx, u8 *dst, const u8 *src)
{
- struct crypt_s390_des3_192_ctx *dctx;
+ struct crypt_s390_des3_192_ctx *dctx = ctx;
- dctx = ctx;
crypt_s390_km(KM_TDEA_192_ENCRYPT, dctx->key, dst, (void*)src,
- DES3_192_BLOCK_SIZE);
+ DES3_192_BLOCK_SIZE);
}
-static void
-des3_192_decrypt(void *ctx, u8 *dst, const u8 *src)
+static void des3_192_decrypt(void *ctx, u8 *dst, const u8 *src)
{
- struct crypt_s390_des3_192_ctx *dctx;
+ struct crypt_s390_des3_192_ctx *dctx = ctx;
- dctx = ctx;
crypt_s390_km(KM_TDEA_192_DECRYPT, dctx->key, dst, (void*)src,
- DES3_192_BLOCK_SIZE);
+ DES3_192_BLOCK_SIZE);
}
static struct crypto_alg des3_192_alg = {
@@ -230,44 +214,39 @@ static struct crypto_alg des3_192_alg = {
.cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(des3_192_alg.cra_list),
- .cra_u = { .cipher = {
- .cia_min_keysize = DES3_192_KEY_SIZE,
- .cia_max_keysize = DES3_192_KEY_SIZE,
- .cia_setkey = des3_192_setkey,
- .cia_encrypt = des3_192_encrypt,
- .cia_decrypt = des3_192_decrypt } }
+ .cra_u = {
+ .cipher = {
+ .cia_min_keysize = DES3_192_KEY_SIZE,
+ .cia_max_keysize = DES3_192_KEY_SIZE,
+ .cia_setkey = des3_192_setkey,
+ .cia_encrypt = des3_192_encrypt,
+ .cia_decrypt = des3_192_decrypt
+ }
+ }
};
-
-
-static int
-init(void)
+static int init(void)
{
- int ret;
+ int ret = 0;
if (!crypt_s390_func_available(KM_DEA_ENCRYPT) ||
!crypt_s390_func_available(KM_TDEA_128_ENCRYPT) ||
- !crypt_s390_func_available(KM_TDEA_192_ENCRYPT)){
+ !crypt_s390_func_available(KM_TDEA_192_ENCRYPT))
return -ENOSYS;
- }
- ret = 0;
- ret |= (crypto_register_alg(&des_alg) == 0)? 0:1;
- ret |= (crypto_register_alg(&des3_128_alg) == 0)? 0:2;
- ret |= (crypto_register_alg(&des3_192_alg) == 0)? 0:4;
- if (ret){
+ ret |= (crypto_register_alg(&des_alg) == 0) ? 0:1;
+ ret |= (crypto_register_alg(&des3_128_alg) == 0) ? 0:2;
+ ret |= (crypto_register_alg(&des3_192_alg) == 0) ? 0:4;
+ if (ret) {
crypto_unregister_alg(&des3_192_alg);
crypto_unregister_alg(&des3_128_alg);
crypto_unregister_alg(&des_alg);
return -EEXIST;
}
-
- printk(KERN_INFO "crypt_s390: des_s390 loaded.\n");
return 0;
}
-static void __exit
-fini(void)
+static void __exit fini(void)
{
crypto_unregister_alg(&des3_192_alg);
crypto_unregister_alg(&des3_128_alg);