[PATCH v2 05/15] crypto: Add userspace report for shash type algorithms

[Steffen Klassert]

Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
---
 crypto/shash.c             |   21 +++++++++++++++++++++
 include/linux/cryptouser.h |    7 +++++++
 2 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/crypto/shash.c b/crypto/shash.c
index 76f74b9..140c337 100644
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -17,6 +17,8 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/seq_file.h>
+#include <linux/cryptouser.h>
+#include <net/netlink.h>
 
 #include "internal.h"
 
@@ -522,6 +524,24 @@ static unsigned int crypto_shash_extsize(struct crypto_alg 
*alg)
        return alg->cra_ctxsize;
 }
 
+static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+       struct crypto_report_shash rshash;
+       struct shash_alg *salg = __crypto_shash_alg(alg);
+
+       snprintf(rshash.type, CRYPTO_MAX_ALG_NAME, "%s", "shash");
+       rshash.blocksize = alg->cra_blocksize;
+       rshash.digestsize = salg->digestsize;
+
+       NLA_PUT(skb, CRYPTOCFGA_REPORT_SHASH,
+               sizeof(struct crypto_report_shash), &rshash);
+
+       return 0;
+
+nla_put_failure:
+       return -EMSGSIZE;
+}
+
 static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg)
        __attribute__ ((unused));
 static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg)
@@ -541,6 +561,7 @@ static const struct crypto_type crypto_shash_type = {
 #ifdef CONFIG_PROC_FS
        .show = crypto_shash_show,
 #endif
+       .report = crypto_shash_report,
        .maskclear = ~CRYPTO_ALG_TYPE_MASK,
        .maskset = CRYPTO_ALG_TYPE_MASK,
        .type = CRYPTO_ALG_TYPE_SHASH,
diff --git a/include/linux/cryptouser.h b/include/linux/cryptouser.h
index d77b16c..8f07bab 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -34,6 +34,7 @@ enum crypto_attr_type_t {
        CRYPTOCFGA_UNSPEC,
        CRYPTOCFGA_PRIORITY_VAL,        /* __u32 */
        CRYPTOCFGA_REPORT_LARVAL,       /* struct crypto_report_larval */
+       CRYPTOCFGA_REPORT_SHASH,        /* struct crypto_report_shash */
        __CRYPTOCFGA_MAX
 
 #define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -61,3 +62,9 @@ struct crypto_report_larval {
        char type[CRYPTO_MAX_NAME];
        __u32 flags;
 };
+
+struct crypto_report_shash {
+       char type[CRYPTO_MAX_NAME];
+       unsigned int blocksize;
+       unsigned int digestsize;
+};
-- 
1.7.0.4

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