[PATCH 08/16] crypto: Add userspace report for blkcipher type algorithms

[Steffen Klassert]

Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
---
 crypto/blkcipher.c         |   29 +++++++++++++++++++++++++++++
 include/linux/cryptouser.h |   10 ++++++++++
 2 files changed, 39 insertions(+), 0 deletions(-)

diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 7a72192..b85a67d 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -24,6 +24,8 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/string.h>
+#include <linux/cryptouser.h>
+#include <net/netlink.h>
 
 #include "internal.h"
 
@@ -492,6 +494,30 @@ static int crypto_init_blkcipher_ops(struct crypto_tfm 
*tfm, u32 type, u32 mask)
                return crypto_init_blkcipher_ops_async(tfm);
 }
 
+static int crypto_blkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
+       __attribute__ ((unused));
+static int crypto_blkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+       struct crypto_report_blkcipher rblkcipher;
+
+       snprintf(rblkcipher.type, CRYPTO_MAX_ALG_NAME, "%s", "blkcipher");
+       snprintf(rblkcipher.geniv, CRYPTO_MAX_ALG_NAME, "%s",
+                alg->cra_blkcipher.geniv ?: "<default>");
+
+       rblkcipher.blocksize = alg->cra_blocksize;
+       rblkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
+       rblkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
+       rblkcipher.ivsize = alg->cra_blkcipher.ivsize;
+
+       NLA_PUT(skb, CRYPTOCFGA_REPORT_BLKCIPHER,
+               sizeof(struct crypto_report_blkcipher), &rblkcipher);
+
+       return 0;
+
+nla_put_failure:
+       return -EMSGSIZE;
+}
+
 static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
        __attribute__ ((unused));
 static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
@@ -511,6 +537,9 @@ const struct crypto_type crypto_blkcipher_type = {
 #ifdef CONFIG_PROC_FS
        .show = crypto_blkcipher_show,
 #endif
+#ifdef CONFIG_CRYPTO_USER
+       .report = crypto_blkcipher_report,
+#endif
 };
 EXPORT_SYMBOL_GPL(crypto_blkcipher_type);
 
diff --git a/include/linux/cryptouser.h b/include/linux/cryptouser.h
index 94ffb7b..e2e6c4c 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -37,6 +37,7 @@ enum crypto_attr_type_t {
        CRYPTOCFGA_REPORT_LARVAL,       /* struct crypto_report_larval */
        CRYPTOCFGA_REPORT_SHASH,        /* struct crypto_report_shash */
        CRYPTOCFGA_REPORT_AHASH,        /* struct crypto_report_ahash */
+       CRYPTOCFGA_REPORT_BLKCIPHER,    /* struct crypto_report_blkcipher */
        __CRYPTOCFGA_MAX
 
 #define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -77,3 +78,12 @@ struct crypto_report_ahash {
        unsigned int blocksize;
        unsigned int digestsize;
 };
+
+struct crypto_report_blkcipher {
+       char type[CRYPTO_MAX_NAME];
+       char geniv[CRYPTO_MAX_NAME];
+       unsigned int blocksize;
+       unsigned int min_keysize;
+       unsigned int max_keysize;
+       unsigned int ivsize;
+};
-- 
1.7.0.4

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