[PATCH v2 14/15] crypto: Add userspace report for cipher type algorithms

[Steffen Klassert]

Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
---
 crypto/crypto_user.c       |   29 +++++++++++++++++++++++++++++
 include/linux/cryptouser.h |    8 ++++++++
 2 files changed, 37 insertions(+), 0 deletions(-)

diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c
index 68d405d..9d10d2f 100644
--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user.c
@@ -69,6 +69,25 @@ static struct crypto_alg *crypto_alg_match(struct 
crypto_user_alg *p)
        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_report_base *rb, struct sk_buff *skb)
 {
@@ -96,6 +115,16 @@ 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 761e9df..4af8222 100644
--- a/include/linux/cryptouser.h
+++ b/include/linux/cryptouser.h
@@ -43,6 +43,7 @@ enum crypto_attr_type_t {
        CRYPTOCFGA_REPORT_NIVAEAD,      /* struct crypto_report_aead */
        CRYPTOCFGA_REPORT_PCOMPRESS,    /* 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)
@@ -84,6 +85,13 @@ struct crypto_report_ahash {
        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];
-- 
1.7.0.4

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