[PATCH v4 12/17] crypto: Add userspace report for aead type algorithms

[Steffen Klassert]

Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
---
 crypto/aead.c              |   25 +++++++++++++++++++++++++
 include/linux/cryptouser.h |    9 +++++++++
 2 files changed, 34 insertions(+), 0 deletions(-)

diff --git a/crypto/aead.c b/crypto/aead.c
index 6729e8f..bb641bd 100644
--- a/crypto/aead.c
+++ b/crypto/aead.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"
 
@@ -109,6 +111,28 @@ static int crypto_init_aead_ops(struct crypto_tfm *tfm, 
u32 type, u32 mask)
        return 0;
 }
 
+static int crypto_aead_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+       struct crypto_report_aead raead;
+       struct aead_alg *aead = &alg->cra_aead;
+
+       snprintf(raead.type, CRYPTO_MAX_ALG_NAME, "%s", "aead");
+       snprintf(raead.geniv, CRYPTO_MAX_ALG_NAME, "%s",
+                aead->geniv ?: "<built-in>");
+
+       raead.blocksize = alg->cra_blocksize;
+       raead.maxauthsize = aead->maxauthsize;
+       raead.ivsize = aead->ivsize;
+
+       NLA_PUT(skb, CRYPTOCFGA_REPORT_AEAD,
+               sizeof(struct crypto_report_aead), &raead);
+
+       return 0;
+
+nla_put_failure:
+       return -EMSGSIZE;
+}
+
 static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg)
        __attribute__ ((unused));
 static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg)
@@ -130,6 +154,7 @@ const struct crypto_type crypto_aead_type = {
 #ifdef CONFIG_PROC_FS
        .show = crypto_aead_show,
 #endif
+       .report = crypto_aead_report,
 };
 EXPORT_SYMBOL_GPL(crypto_aead_type);
 
diff --git a/include/linux/cryptouser.h b/include/linux/cryptouser.h
index a96a1a1..48030c7 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -39,6 +39,7 @@ enum crypto_attr_type_t {
        CRYPTOCFGA_REPORT_LARVAL,       /* struct crypto_report_larval */
        CRYPTOCFGA_REPORT_HASH,         /* struct crypto_report_hash */
        CRYPTOCFGA_REPORT_BLKCIPHER,    /* struct crypto_report_blkcipher */
+       CRYPTOCFGA_REPORT_AEAD,         /* struct crypto_report_aead */
        __CRYPTOCFGA_MAX
 
 #define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -72,3 +73,11 @@ struct crypto_report_blkcipher {
        unsigned int max_keysize;
        unsigned int ivsize;
 };
+
+struct crypto_report_aead {
+       char type[CRYPTO_MAX_NAME];
+       char geniv[CRYPTO_MAX_NAME];
+       unsigned int blocksize;
+       unsigned int maxauthsize;
+       unsigned int ivsize;
+};
-- 
1.7.0.4

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