crypto: Add userspace report for rng type algorithms

[karo-tx-linux.git] / crypto / rng.c

diff --git a/crypto/rng.c b/crypto/rng.c
index 45229ae782be91d4bec33185bccdee77ce95f1d5..feb7de00f437380fc8e95a3bf21398c9b4b1ce23 100644 (file)
--- 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);