crypto: Add userspace report for cipher type algorithms

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

2 files changed, 37 insertions, 0 deletions

diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c
index 8a0c5c6c6589..52459ae711a9 100644
--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user.c
@@ -70,6 +70,25 @@ static struct crypto_alg *crypto_alg_match(struct crypto_user_alg *p, int exact)
         return alg;
 }
 
+static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
+{
+        struct crypto_report_cipher rcipher;
+
+        snprintf(rcipher.type, CRYPTO_MAX_ALG_NAME, "%s", "cipher");
+
+        rcipher.blocksize = alg->cra_blocksize;
+        rcipher.min_keysize = alg->cra_cipher.cia_min_keysize;
+        rcipher.max_keysize = alg->cra_cipher.cia_max_keysize;
+
+        NLA_PUT(skb, CRYPTOCFGA_REPORT_CIPHER,
+                sizeof(struct crypto_report_cipher), &rcipher);
+
+        return 0;
+
+nla_put_failure:
+        return -EMSGSIZE;
+}
+
 static int crypto_report_one(struct crypto_alg *alg,
                              struct crypto_user_alg *ualg, struct sk_buff *skb)
 {
@@ -98,6 +117,16 @@ static int crypto_report_one(struct crypto_alg *alg,
         if (alg->cra_type && alg->cra_type->report) {
                 if (alg->cra_type->report(skb, alg))
                         goto nla_put_failure;
+
+                goto out;
+        }
+
+        switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
+        case CRYPTO_ALG_TYPE_CIPHER:
+                if (crypto_report_cipher(skb, alg))
+                        goto nla_put_failure;
+
+                break;
         }
 
 out:
diff --git a/include/linux/cryptouser.h b/include/linux/cryptouser.h
index ed8a40e8fb6b..532fb58f16bf 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -42,6 +42,7 @@ enum crypto_attr_type_t {
         CRYPTOCFGA_REPORT_AEAD,         /* struct crypto_report_aead */
         CRYPTOCFGA_REPORT_COMPRESS,     /* struct crypto_report_comp */
         CRYPTOCFGA_REPORT_RNG,          /* struct crypto_report_rng */
+        CRYPTOCFGA_REPORT_CIPHER,       /* struct crypto_report_cipher */
         __CRYPTOCFGA_MAX
 
 #define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -67,6 +68,13 @@ struct crypto_report_hash {
         unsigned int digestsize;
 };
 
+struct crypto_report_cipher {
+        char type[CRYPTO_MAX_ALG_NAME];
+        unsigned int blocksize;
+        unsigned int min_keysize;
+        unsigned int max_keysize;
+};
+
 struct crypto_report_blkcipher {
         char type[CRYPTO_MAX_NAME];
         char geniv[CRYPTO_MAX_NAME];