[PATCH v2 08/15] crypto: Add userspace report for ablkcipher type algorithms

[Steffen Klassert]

Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
---
 crypto/ablkcipher.c        |   27 +++++++++++++++++++++++++++
 include/linux/cryptouser.h |   11 +++++++++++
 2 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index fdc67d3..60f5c01 100644
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -23,6 +23,8 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/seq_file.h>
+#include <linux/cryptouser.h>
+#include <net/netlink.h>
 
 #include <crypto/scatterwalk.h>
 
@@ -381,6 +383,30 @@ static int crypto_init_ablkcipher_ops(struct crypto_tfm 
*tfm, u32 type,
        return 0;
 }
 
+static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg 
*alg)
+{
+       struct crypto_report_ablkcipher rablkcipher;
+
+       snprintf(rablkcipher.type, CRYPTO_MAX_ALG_NAME, "%s", "ablkcipher");
+       snprintf(rablkcipher.geniv, CRYPTO_MAX_ALG_NAME, "%s",
+                alg->cra_ablkcipher.geniv ?: "<default>");
+       snprintf(rablkcipher.async, CRYPTO_MAX_ALG_NAME, "%s",
+                alg->cra_flags & CRYPTO_ALG_ASYNC ? "yes" : "no");
+
+       rablkcipher.blocksize = alg->cra_blocksize;
+       rablkcipher.min_keysize = alg->cra_ablkcipher.min_keysize;
+       rablkcipher.max_keysize = alg->cra_ablkcipher.max_keysize;
+       rablkcipher.ivsize = alg->cra_ablkcipher.ivsize;
+
+       NLA_PUT(skb, CRYPTOCFGA_REPORT_ABLKCIPHER,
+               sizeof(struct crypto_report_ablkcipher), &rablkcipher);
+
+       return 0;
+
+nla_put_failure:
+       return -EMSGSIZE;
+}
+
 static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
        __attribute__ ((unused));
 static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
@@ -403,6 +429,7 @@ const struct crypto_type crypto_ablkcipher_type = {
 #ifdef CONFIG_PROC_FS
        .show = crypto_ablkcipher_show,
 #endif
+       .report = crypto_ablkcipher_report,
 };
 EXPORT_SYMBOL_GPL(crypto_ablkcipher_type);
 
diff --git a/include/linux/cryptouser.h b/include/linux/cryptouser.h
index c59109f..c0023cf 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -37,6 +37,7 @@ enum crypto_attr_type_t {
        CRYPTOCFGA_REPORT_SHASH,        /* struct crypto_report_shash */
        CRYPTOCFGA_REPORT_AHASH,        /* struct crypto_report_ahash */
        CRYPTOCFGA_REPORT_BLKCIPHER,    /* struct crypto_report_blkcipher */
+       CRYPTOCFGA_REPORT_ABLKCIPHER,   /* struct crypto_report_ablkcipher */
        __CRYPTOCFGA_MAX
 
 #define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -86,3 +87,13 @@ struct crypto_report_blkcipher {
        unsigned int max_keysize;
        unsigned int ivsize;
 };
+
+struct crypto_report_ablkcipher {
+       char type[CRYPTO_MAX_NAME];
+       char async[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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