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-rw-r--r--crypto/ablkcipher.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index e11ce37c710..f6f08336df5 100644
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -14,6 +14,7 @@
*/
#include <crypto/internal/skcipher.h>
+#include <linux/cpumask.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -25,6 +26,8 @@
#include "internal.h"
+static const char *skcipher_default_geniv __read_mostly;
+
static int setkey_unaligned(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int keylen)
{
@@ -180,7 +183,14 @@ EXPORT_SYMBOL_GPL(crypto_givcipher_type);
const char *crypto_default_geniv(const struct crypto_alg *alg)
{
- return alg->cra_flags & CRYPTO_ALG_ASYNC ? "eseqiv" : "chainiv";
+ if (((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+ CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize :
+ alg->cra_ablkcipher.ivsize) !=
+ alg->cra_blocksize)
+ return "chainiv";
+
+ return alg->cra_flags & CRYPTO_ALG_ASYNC ?
+ "eseqiv" : skcipher_default_geniv;
}
static int crypto_givcipher_default(struct crypto_alg *alg, u32 type, u32 mask)
@@ -201,8 +211,9 @@ static int crypto_givcipher_default(struct crypto_alg *alg, u32 type, u32 mask)
int err;
larval = crypto_larval_lookup(alg->cra_driver_name,
+ (type & ~CRYPTO_ALG_TYPE_MASK) |
CRYPTO_ALG_TYPE_GIVCIPHER,
- CRYPTO_ALG_TYPE_MASK);
+ mask | CRYPTO_ALG_TYPE_MASK);
err = PTR_ERR(larval);
if (IS_ERR(larval))
goto out;
@@ -360,3 +371,17 @@ err:
return ERR_PTR(err);
}
EXPORT_SYMBOL_GPL(crypto_alloc_ablkcipher);
+
+static int __init skcipher_module_init(void)
+{
+ skcipher_default_geniv = num_possible_cpus() > 1 ?
+ "eseqiv" : "chainiv";
+ return 0;
+}
+
+static void skcipher_module_exit(void)
+{
+}
+
+module_init(skcipher_module_init);
+module_exit(skcipher_module_exit);