X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=crypto%2Fchainiv.c;h=7c37a497b860a27733eac07c4f7ff018c0abb4a3;hb=984f2f377fdfd098f5ae58d09ee04d5e29e6112b;hp=9affadee32879c5114afab56d4bc82428c01dcf6;hpb=9fec6060d9e48ed7db0dac0e16d0f0f0e615b7f6;p=linux-2.6-omap-h63xx.git

diff --git a/crypto/chainiv.c b/crypto/chainiv.c
index 9affadee328..7c37a497b86 100644
--- a/crypto/chainiv.c
+++ b/crypto/chainiv.c
@@ -14,11 +14,11 @@
  */
 
 #include <crypto/internal/skcipher.h>
+#include <crypto/rng.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/random.h>
 #include <linux/spinlock.h>
 #include <linux/string.h>
 #include <linux/workqueue.h>
@@ -83,6 +83,7 @@ static int chainiv_givencrypt_first(struct skcipher_givcrypt_request *req)
 {
 	struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
 	struct chainiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
+	int err = 0;
 
 	spin_lock_bh(&ctx->lock);
 	if (crypto_ablkcipher_crt(geniv)->givencrypt !=
@@ -90,11 +91,15 @@ static int chainiv_givencrypt_first(struct skcipher_givcrypt_request *req)
 		goto unlock;
 
 	crypto_ablkcipher_crt(geniv)->givencrypt = chainiv_givencrypt;
-	get_random_bytes(ctx->iv, crypto_ablkcipher_ivsize(geniv));
+	err = crypto_rng_get_bytes(crypto_default_rng, ctx->iv,
+				   crypto_ablkcipher_ivsize(geniv));
 
 unlock:
 	spin_unlock_bh(&ctx->lock);
 
+	if (err)
+		return err;
+
 	return chainiv_givencrypt(req);
 }
 
@@ -203,6 +208,7 @@ static int async_chainiv_givencrypt_first(struct skcipher_givcrypt_request *req)
 {
 	struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
 	struct async_chainiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
+	int err = 0;
 
 	if (test_and_set_bit(CHAINIV_STATE_INUSE, &ctx->state))
 		goto out;
@@ -212,11 +218,15 @@ static int async_chainiv_givencrypt_first(struct skcipher_givcrypt_request *req)
 		goto unlock;
 
 	crypto_ablkcipher_crt(geniv)->givencrypt = async_chainiv_givencrypt;
-	get_random_bytes(ctx->iv, crypto_ablkcipher_ivsize(geniv));
+	err = crypto_rng_get_bytes(crypto_default_rng, ctx->iv,
+				   crypto_ablkcipher_ivsize(geniv));
 
 unlock:
 	clear_bit(CHAINIV_STATE_INUSE, &ctx->state);
 
+	if (err)
+		return err;
+
 out:
 	return async_chainiv_givencrypt(req);
 }
@@ -284,9 +294,13 @@ static struct crypto_instance *chainiv_alloc(struct rtattr **tb)
 	if (IS_ERR(algt))
 		return ERR_PTR(err);
 
+	err = crypto_get_default_rng();
+	if (err)
+		return ERR_PTR(err);
+
 	inst = skcipher_geniv_alloc(&chainiv_tmpl, tb, 0, 0);
 	if (IS_ERR(inst))
-		goto out;
+		goto put_rng;
 
 	inst->alg.cra_ablkcipher.givencrypt = chainiv_givencrypt_first;
 
@@ -311,21 +325,37 @@ static struct crypto_instance *chainiv_alloc(struct rtattr **tb)
 
 out:
 	return inst;
+
+put_rng:
+	crypto_put_default_rng();
+	goto out;
+}
+
+static void chainiv_free(struct crypto_instance *inst)
+{
+	skcipher_geniv_free(inst);
+	crypto_put_default_rng();
 }
 
 static struct crypto_template chainiv_tmpl = {
 	.name = "chainiv",
 	.alloc = chainiv_alloc,
-	.free = skcipher_geniv_free,
+	.free = chainiv_free,
 	.module = THIS_MODULE,
 };
 
-int __init chainiv_module_init(void)
+static int __init chainiv_module_init(void)
 {
 	return crypto_register_template(&chainiv_tmpl);
 }
 
-void chainiv_module_exit(void)
+static void chainiv_module_exit(void)
 {
 	crypto_unregister_template(&chainiv_tmpl);
 }
+
+module_init(chainiv_module_init);
+module_exit(chainiv_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Chain IV Generator");