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authorSteffen Klassert <steffen.klassert@secunet.com>2011-09-27 07:47:11 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2011-10-21 14:24:06 +0200
commit792608e9c215141fa4b870b7b2a23767a1ef12f4 (patch)
treecb781b8cec57d958fb0cdbec0807289a3b868ad8
parenta55465dca7befd31f4ffa54508d4e2d1e701b8dc (diff)
crypto: Add userspace report for rng type algorithms
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/rng.c20
-rw-r--r--include/linux/cryptouser.h6
2 files changed, 26 insertions, 0 deletions
diff --git a/crypto/rng.c b/crypto/rng.c
index 45229ae782be..feb7de00f437 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -21,6 +21,8 @@
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/string.h>
+#include <linux/cryptouser.h>
+#include <net/netlink.h>
static DEFINE_MUTEX(crypto_default_rng_lock);
struct crypto_rng *crypto_default_rng;
@@ -58,6 +60,23 @@ static int crypto_init_rng_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
return 0;
}
+static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_report_rng rrng;
+
+ snprintf(rrng.type, CRYPTO_MAX_ALG_NAME, "%s", "rng");
+
+ rrng.seedsize = alg->cra_rng.seedsize;
+
+ NLA_PUT(skb, CRYPTOCFGA_REPORT_RNG,
+ sizeof(struct crypto_report_rng), &rrng);
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
@@ -78,6 +97,7 @@ const struct crypto_type crypto_rng_type = {
#ifdef CONFIG_PROC_FS
.show = crypto_rng_show,
#endif
+ .report = crypto_rng_report,
};
EXPORT_SYMBOL_GPL(crypto_rng_type);
diff --git a/include/linux/cryptouser.h b/include/linux/cryptouser.h
index c8c1dfcb7cf2..ed8a40e8fb6b 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -41,6 +41,7 @@ enum crypto_attr_type_t {
CRYPTOCFGA_REPORT_BLKCIPHER, /* struct crypto_report_blkcipher */
CRYPTOCFGA_REPORT_AEAD, /* struct crypto_report_aead */
CRYPTOCFGA_REPORT_COMPRESS, /* struct crypto_report_comp */
+ CRYPTOCFGA_REPORT_RNG, /* struct crypto_report_rng */
__CRYPTOCFGA_MAX
#define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -86,3 +87,8 @@ struct crypto_report_aead {
struct crypto_report_comp {
char type[CRYPTO_MAX_NAME];
};
+
+struct crypto_report_rng {
+ char type[CRYPTO_MAX_NAME];
+ unsigned int seedsize;
+};

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