diff options
Diffstat (limited to 'crypto/rng.c')
| -rw-r--r-- | crypto/rng.c | 39 |
1 files changed, 18 insertions, 21 deletions
diff --git a/crypto/rng.c b/crypto/rng.c index 33c38a72bff5..ee1768c5a400 100644 --- a/crypto/rng.c +++ b/crypto/rng.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Cryptographic API. * @@ -5,25 +6,19 @@ * * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com> * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * */ -#include <linux/atomic.h> #include <crypto/internal/rng.h> +#include <linux/atomic.h> +#include <linux/cryptouser.h> #include <linux/err.h> +#include <linux/kernel.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/random.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/string.h> -#include <linux/cryptouser.h> -#include <linux/compiler.h> #include <net/netlink.h> #include "internal.h" @@ -35,11 +30,9 @@ static int crypto_default_rng_refcnt; int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, unsigned int slen) { - struct crypto_alg *alg = tfm->base.__crt_alg; u8 *buf = NULL; int err; - crypto_stats_get(alg); if (!seed && slen) { buf = kmalloc(slen, GFP_KERNEL); if (!buf) @@ -52,9 +45,8 @@ int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, unsigned int slen) } err = crypto_rng_alg(tfm)->seed(tfm, seed, slen); - crypto_stats_rng_seed(alg, err); out: - kzfree(buf); + kfree_sensitive(buf); return err; } EXPORT_SYMBOL_GPL(crypto_rng_reset); @@ -71,8 +63,8 @@ static unsigned int seedsize(struct crypto_alg *alg) return ralg->seedsize; } -#ifdef CONFIG_NET -static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg) +static int __maybe_unused crypto_rng_report( + struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_rng rrng; @@ -84,12 +76,6 @@ static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg) return nla_put(skb, CRYPTOCFGA_REPORT_RNG, sizeof(rrng), &rrng); } -#else -static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg) -{ - return -ENOSYS; -} -#endif static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg) __maybe_unused; @@ -105,11 +91,14 @@ static const struct crypto_type crypto_rng_type = { #ifdef CONFIG_PROC_FS .show = crypto_rng_show, #endif +#if IS_ENABLED(CONFIG_CRYPTO_USER) .report = crypto_rng_report, +#endif .maskclear = ~CRYPTO_ALG_TYPE_MASK, .maskset = CRYPTO_ALG_TYPE_MASK, .type = CRYPTO_ALG_TYPE_RNG, .tfmsize = offsetof(struct crypto_rng, base), + .algsize = offsetof(struct rng_alg, base), }; struct crypto_rng *crypto_alloc_rng(const char *alg_name, u32 type, u32 mask) @@ -179,6 +168,11 @@ out: EXPORT_SYMBOL_GPL(crypto_del_default_rng); #endif +static void rng_default_set_ent(struct crypto_rng *tfm, const u8 *data, + unsigned int len) +{ +} + int crypto_register_rng(struct rng_alg *alg) { struct crypto_alg *base = &alg->base; @@ -190,6 +184,9 @@ int crypto_register_rng(struct rng_alg *alg) base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; base->cra_flags |= CRYPTO_ALG_TYPE_RNG; + if (!alg->set_ent) + alg->set_ent = rng_default_set_ent; + return crypto_register_alg(base); } EXPORT_SYMBOL_GPL(crypto_register_rng); |