[PATCH v2 09/15] crypto: Add userspace report for givcipher type algorithms

[Steffen Klassert]

Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
---
 crypto/ablkcipher.c        |   25 +++++++++++++++++++++++++
 include/linux/cryptouser.h |    1 +
 2 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index 60f5c01..45ed1c3 100644
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -459,6 +459,30 @@ static int crypto_init_givcipher_ops(struct crypto_tfm 
*tfm, u32 type,
        return 0;
 }
 
+static int crypto_givcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+       struct crypto_report_ablkcipher rablkcipher;
+
+       snprintf(rablkcipher.type, CRYPTO_MAX_ALG_NAME, "%s", "givcipher");
+       snprintf(rablkcipher.geniv, CRYPTO_MAX_ALG_NAME, "%s",
+                alg->cra_ablkcipher.geniv ?: "<built-in>");
+       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_GIVCIPHER,
+               sizeof(struct crypto_report_ablkcipher), &rablkcipher);
+
+       return 0;
+
+nla_put_failure:
+       return -EMSGSIZE;
+}
+
 static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg)
        __attribute__ ((unused));
 static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg)
@@ -481,6 +505,7 @@ const struct crypto_type crypto_givcipher_type = {
 #ifdef CONFIG_PROC_FS
        .show = crypto_givcipher_show,
 #endif
+       .report = crypto_givcipher_report,
 };
 EXPORT_SYMBOL_GPL(crypto_givcipher_type);
 
diff --git a/include/linux/cryptouser.h b/include/linux/cryptouser.h
index c0023cf..2e67da6 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -38,6 +38,7 @@ enum crypto_attr_type_t {
        CRYPTOCFGA_REPORT_AHASH,        /* struct crypto_report_ahash */
        CRYPTOCFGA_REPORT_BLKCIPHER,    /* struct crypto_report_blkcipher */
        CRYPTOCFGA_REPORT_ABLKCIPHER,   /* struct crypto_report_ablkcipher */
+       CRYPTOCFGA_REPORT_GIVCIPHER,    /* struct crypto_report_ablkcipher */
        __CRYPTOCFGA_MAX
 
 #define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
-- 
1.7.0.4

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