[PATCH v2 06/15] crypto: Add userspace report for ahash type algorithms

[Steffen Klassert]

Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
---
 crypto/ahash.c             |   23 +++++++++++++++++++++++
 include/linux/cryptouser.h |    8 ++++++++
 2 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/crypto/ahash.c b/crypto/ahash.c
index f669822..83827cc 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 +399,26 @@ 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_ahash rahash;
+
+       snprintf(rahash.type, CRYPTO_MAX_ALG_NAME, "%s", "ahash");
+       snprintf(rahash.async, CRYPTO_MAX_ALG_NAME, "%s",
+                alg->cra_flags & CRYPTO_ALG_ASYNC ? "yes" : "no");
+
+       rahash.blocksize = alg->cra_blocksize;
+       rahash.digestsize = __crypto_hash_alg_common(alg)->digestsize;
+
+       NLA_PUT(skb, CRYPTOCFGA_REPORT_AHASH,
+               sizeof(struct crypto_report_ahash), &rahash);
+
+       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 +437,7 @@ 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,
diff --git a/include/linux/cryptouser.h b/include/linux/cryptouser.h
index 8f07bab..cfe6156 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -35,6 +35,7 @@ enum crypto_attr_type_t {
        CRYPTOCFGA_PRIORITY_VAL,        /* __u32 */
        CRYPTOCFGA_REPORT_LARVAL,       /* struct crypto_report_larval */
        CRYPTOCFGA_REPORT_SHASH,        /* struct crypto_report_shash */
+       CRYPTOCFGA_REPORT_AHASH,        /* struct crypto_report_ahash */
        __CRYPTOCFGA_MAX
 
 #define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -68,3 +69,10 @@ struct crypto_report_shash {
        unsigned int blocksize;
        unsigned int digestsize;
 };
+
+struct crypto_report_ahash {
+       char type[CRYPTO_MAX_NAME];
+       char async[CRYPTO_MAX_NAME];
+       unsigned int blocksize;
+       unsigned int digestsize;
+};
-- 
1.7.0.4

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