crypto: tcrypt - Speed testing support for ghash

[safe/jmp/linux-2.6] / crypto / ablkcipher.c

diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index 43fc8fb..fe980da 100644 (file)
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -1,6 +1,6 @@
 /*
  * Asynchronous block chaining cipher operations.
- * 
+ *
  * This is the asynchronous version of blkcipher.c indicating completion
  * via a callback.
  *
@@ -8,12 +8,13 @@
  *
  * 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
- * Software Foundation; either version 2 of the License, or (at your option) 
+ * Software Foundation; either version 2 of the License, or (at your option)
  * any later version.
  *
  */
 
 #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)
@@ -361,3 +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);