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Commit 792608e9 authored by Steffen Klassert's avatar Steffen Klassert Committed by Herbert Xu
Browse files

crypto: Add userspace report for rng type algorithms 



Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent a55465dc

crypto/rng.c

+20 −0
Original line number Diff line number Diff line
@@ -21,6 +21,8 @@ 
#include <linux/seq_file.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/cryptouser.h>

#include <net/netlink.h>



static DEFINE_MUTEX(crypto_default_rng_lock);

struct crypto_rng *crypto_default_rng;
@@ -58,6 +60,23 @@ static int crypto_init_rng_ops(struct crypto_tfm *tfm, u32 type, u32 mask) 
	return 0;

}



static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg)

{

	struct crypto_report_rng rrng;



	snprintf(rrng.type, CRYPTO_MAX_ALG_NAME, "%s", "rng");



	rrng.seedsize = alg->cra_rng.seedsize;



	NLA_PUT(skb, CRYPTOCFGA_REPORT_RNG,

		sizeof(struct crypto_report_rng), &rrng);



	return 0;



nla_put_failure:

	return -EMSGSIZE;

}



static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)

	__attribute__ ((unused));

static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
@@ -78,6 +97,7 @@ const struct crypto_type crypto_rng_type = { 
#ifdef CONFIG_PROC_FS

	.show = crypto_rng_show,

#endif

	.report = crypto_rng_report,

};

EXPORT_SYMBOL_GPL(crypto_rng_type);

include/linux/cryptouser.h

+6 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ enum crypto_attr_type_t { 
	CRYPTOCFGA_REPORT_BLKCIPHER,	/* struct crypto_report_blkcipher */

	CRYPTOCFGA_REPORT_AEAD,		/* struct crypto_report_aead */

	CRYPTOCFGA_REPORT_COMPRESS,	/* struct crypto_report_comp */

	CRYPTOCFGA_REPORT_RNG,		/* struct crypto_report_rng */

	__CRYPTOCFGA_MAX



#define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -86,3 +87,8 @@ struct crypto_report_aead { 
struct crypto_report_comp {

	char type[CRYPTO_MAX_NAME];

};



struct crypto_report_rng {

	char type[CRYPTO_MAX_NAME];

	unsigned int seedsize;

};