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authorHerbert Xu <herbert@gondor.apana.org.au>2008-08-14 22:21:31 +1000
committerHerbert Xu <herbert@gondor.apana.org.au>2008-08-29 15:50:06 +1000
commita0f000ec9b61b99111757df138b11144236fc59b (patch)
treebd698163c48b5cd6d6a3c05c8d34d862ebcd86ed /crypto/eseqiv.c
parent17f0f4a47df9aea9ee26c939f8057c35e0be1847 (diff)
downloadlinux-a0f000ec9b61b99111757df138b11144236fc59b.tar.gz
crypto: skcipher - Use RNG interface instead of get_random_bytes
This patch makes the IV generators use the new RNG interface so that the user can pick an RNG other than the default get_random_bytes. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/eseqiv.c')
-rw-r--r--crypto/eseqiv.c25
1 files changed, 21 insertions, 4 deletions
diff --git a/crypto/eseqiv.c b/crypto/eseqiv.c
index f5def217a8f..2a342c8e52b 100644
--- a/crypto/eseqiv.c
+++ b/crypto/eseqiv.c
@@ -16,13 +16,13 @@
*/
#include <crypto/internal/skcipher.h>
+#include <crypto/rng.h>
#include <crypto/scatterwalk.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
-#include <linux/random.h>
#include <linux/scatterlist.h>
#include <linux/spinlock.h>
#include <linux/string.h>
@@ -163,17 +163,22 @@ static int eseqiv_givencrypt_first(struct skcipher_givcrypt_request *req)
{
struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
struct eseqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
+ int err = 0;
spin_lock_bh(&ctx->lock);
if (crypto_ablkcipher_crt(geniv)->givencrypt != eseqiv_givencrypt_first)
goto unlock;
crypto_ablkcipher_crt(geniv)->givencrypt = eseqiv_givencrypt;
- get_random_bytes(ctx->salt, crypto_ablkcipher_ivsize(geniv));
+ err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
+ crypto_ablkcipher_ivsize(geniv));
unlock:
spin_unlock_bh(&ctx->lock);
+ if (err)
+ return err;
+
return eseqiv_givencrypt(req);
}
@@ -216,9 +221,13 @@ static struct crypto_instance *eseqiv_alloc(struct rtattr **tb)
struct crypto_instance *inst;
int err;
+ err = crypto_get_default_rng();
+ if (err)
+ return ERR_PTR(err);
+
inst = skcipher_geniv_alloc(&eseqiv_tmpl, tb, 0, 0);
if (IS_ERR(inst))
- goto out;
+ goto put_rng;
err = -EINVAL;
if (inst->alg.cra_ablkcipher.ivsize != inst->alg.cra_blocksize)
@@ -238,13 +247,21 @@ out:
free_inst:
skcipher_geniv_free(inst);
inst = ERR_PTR(err);
+put_rng:
+ crypto_put_default_rng();
goto out;
}
+static void eseqiv_free(struct crypto_instance *inst)
+{
+ skcipher_geniv_free(inst);
+ crypto_put_default_rng();
+}
+
static struct crypto_template eseqiv_tmpl = {
.name = "eseqiv",
.alloc = eseqiv_alloc,
- .free = skcipher_geniv_free,
+ .free = eseqiv_free,
.module = THIS_MODULE,
};