X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=crypto%2Fablkcipher.c;h=fe980dae1727a4183035e05002355da9c0514fa3;hb=20d5f116ec777c9c7ce5b74f0d17ee1d01a0d833;hp=94140b3756fcd598d49179deac34ed5a80a83ed5;hpb=76fc60a2e3c6aa6e98cd3a5cb81a1855c637b274;p=safe%2Fjmp%2Flinux-2.6

diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index 94140b3..fe980da 100644
--- 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)
@@ -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;
@@ -282,6 +293,25 @@ static struct crypto_alg *crypto_lookup_skcipher(const char *name, u32 type,
 					  alg->cra_ablkcipher.ivsize))
 		return alg;
 
+	crypto_mod_put(alg);
+	alg = crypto_alg_mod_lookup(name, type | CRYPTO_ALG_TESTED,
+				    mask & ~CRYPTO_ALG_TESTED);
+	if (IS_ERR(alg))
+		return alg;
+
+	if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+	    CRYPTO_ALG_TYPE_GIVCIPHER) {
+		if ((alg->cra_flags ^ type ^ ~mask) & CRYPTO_ALG_TESTED) {
+			crypto_mod_put(alg);
+			alg = ERR_PTR(-ENOENT);
+		}
+		return alg;
+	}
+
+	BUG_ON(!((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+		 CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize :
+					     alg->cra_ablkcipher.ivsize));
+
 	return ERR_PTR(crypto_givcipher_default(alg, type, mask));
 }
 
@@ -341,3 +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);