[CRYPTO] hifn_795x: Detect weak keys
HIFN driver update to use DES weak key checks (exported in this patch).
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/des_generic.c b/crypto/des_generic.c
index f75eafe..355ecb7 100644
--- a/crypto/des_generic.c
+++ b/crypto/des_generic.c
@@ -628,7 +628,7 @@
* Choice 1 has operated on the key.
*
*/
-static unsigned long ekey(u32 *pe, const u8 *k)
+unsigned long des_ekey(u32 *pe, const u8 *k)
{
/* K&R: long is at least 32 bits */
unsigned long a, b, c, d, w;
@@ -703,6 +703,7 @@
/* Zero if weak key */
return w;
}
+EXPORT_SYMBOL_GPL(des_ekey);
/*
* Decryption key expansion
@@ -786,7 +787,7 @@
int ret;
/* Expand to tmp */
- ret = ekey(tmp, key);
+ ret = des_ekey(tmp, key);
if (unlikely(ret == 0) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
*flags |= CRYPTO_TFM_RES_WEAK_KEY;
@@ -873,9 +874,9 @@
return -EINVAL;
}
- ekey(expkey, key); expkey += DES_EXPKEY_WORDS; key += DES_KEY_SIZE;
+ des_ekey(expkey, key); expkey += DES_EXPKEY_WORDS; key += DES_KEY_SIZE;
dkey(expkey, key); expkey += DES_EXPKEY_WORDS; key += DES_KEY_SIZE;
- ekey(expkey, key);
+ des_ekey(expkey, key);
return 0;
}
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 1ef7697..c2de135 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -85,9 +85,9 @@
config CRYPTO_DEV_HIFN_795X
tristate "Driver HIFN 795x crypto accelerator chips"
+ select CRYPTO_DES
select CRYPTO_ALGAPI
select CRYPTO_ABLKCIPHER
- select CRYPTO_BLKCIPHER
help
This option allows you to have support for HIFN 795x crypto adapters.
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index e3376f2..391c20a 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -29,6 +29,7 @@
#include <linux/crypto.h>
#include <crypto/algapi.h>
+#include <crypto/des.h>
#include <asm/kmap_types.h>
@@ -1924,6 +1925,16 @@
return -1;
}
+ if (len == HIFN_DES_KEY_LENGTH) {
+ u32 tmp[DES_EXPKEY_WORDS];
+ int ret = des_ekey(tmp, key);
+
+ if (unlikely(ret == 0) && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
+ return -EINVAL;
+ }
+ }
+
dev->flags &= ~HIFN_FLAG_OLD_KEY;
memcpy(ctx->key, key, len);