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>

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:

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];