crypto: Add userspace report for ahash type algorithms

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 21 insertions, 0 deletions

diff --git a/crypto/ahash.c b/crypto/ahash.c
index f669822a7a44..a3e6ef99394a 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -21,6 +21,8 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/seq_file.h>
+#include <linux/cryptouser.h>
+#include <net/netlink.h>
 
 #include "internal.h"
 
@@ -397,6 +399,24 @@ static unsigned int crypto_ahash_extsize(struct crypto_alg *alg)
         return sizeof(struct crypto_shash *);
 }
 
+static int crypto_ahash_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+        struct crypto_report_hash rhash;
+
+        snprintf(rhash.type, CRYPTO_MAX_ALG_NAME, "%s", "ahash");
+
+        rhash.blocksize = alg->cra_blocksize;
+        rhash.digestsize = __crypto_hash_alg_common(alg)->digestsize;
+
+        NLA_PUT(skb, CRYPTOCFGA_REPORT_HASH,
+                sizeof(struct crypto_report_hash), &rhash);
+
+        return 0;
+
+nla_put_failure:
+        return -EMSGSIZE;
+}
+
 static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
         __attribute__ ((unused));
 static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
@@ -415,6 +435,7 @@ const struct crypto_type crypto_ahash_type = {
 #ifdef CONFIG_PROC_FS
         .show = crypto_ahash_show,
 #endif
+        .report = crypto_ahash_report,
         .maskclear = ~CRYPTO_ALG_TYPE_MASK,
         .maskset = CRYPTO_ALG_TYPE_AHASH_MASK,
         .type = CRYPTO_ALG_TYPE_AHASH,