mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
cac5818c25
This patch implement a generic way to get statistics about all crypto usages. Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
463 lines
11 KiB
C
463 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Crypto user configuration API.
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*
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* Copyright (C) 2017-2018 Corentin Labbe <clabbe@baylibre.com>
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*
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*/
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#include <linux/crypto.h>
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#include <linux/cryptouser.h>
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#include <linux/sched.h>
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#include <net/netlink.h>
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#include <crypto/internal/skcipher.h>
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#include <crypto/internal/rng.h>
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#include <crypto/akcipher.h>
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#include <crypto/kpp.h>
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#include <crypto/internal/cryptouser.h>
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#include "internal.h"
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#define null_terminated(x) (strnlen(x, sizeof(x)) < sizeof(x))
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static DEFINE_MUTEX(crypto_cfg_mutex);
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extern struct sock *crypto_nlsk;
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struct crypto_dump_info {
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struct sk_buff *in_skb;
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struct sk_buff *out_skb;
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u32 nlmsg_seq;
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u16 nlmsg_flags;
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};
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static int crypto_report_aead(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_stat raead;
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u64 v64;
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u32 v32;
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strncpy(raead.type, "aead", sizeof(raead.type));
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v32 = atomic_read(&alg->encrypt_cnt);
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raead.stat_encrypt_cnt = v32;
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v64 = atomic64_read(&alg->encrypt_tlen);
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raead.stat_encrypt_tlen = v64;
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v32 = atomic_read(&alg->decrypt_cnt);
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raead.stat_decrypt_cnt = v32;
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v64 = atomic64_read(&alg->decrypt_tlen);
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raead.stat_decrypt_tlen = v64;
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v32 = atomic_read(&alg->aead_err_cnt);
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raead.stat_aead_err_cnt = v32;
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if (nla_put(skb, CRYPTOCFGA_STAT_AEAD,
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sizeof(struct crypto_stat), &raead))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_stat rcipher;
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u64 v64;
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u32 v32;
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strlcpy(rcipher.type, "cipher", sizeof(rcipher.type));
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v32 = atomic_read(&alg->encrypt_cnt);
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rcipher.stat_encrypt_cnt = v32;
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v64 = atomic64_read(&alg->encrypt_tlen);
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rcipher.stat_encrypt_tlen = v64;
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v32 = atomic_read(&alg->decrypt_cnt);
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rcipher.stat_decrypt_cnt = v32;
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v64 = atomic64_read(&alg->decrypt_tlen);
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rcipher.stat_decrypt_tlen = v64;
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v32 = atomic_read(&alg->cipher_err_cnt);
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rcipher.stat_cipher_err_cnt = v32;
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if (nla_put(skb, CRYPTOCFGA_STAT_CIPHER,
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sizeof(struct crypto_stat), &rcipher))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_stat rcomp;
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u64 v64;
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u32 v32;
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strlcpy(rcomp.type, "compression", sizeof(rcomp.type));
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v32 = atomic_read(&alg->compress_cnt);
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rcomp.stat_compress_cnt = v32;
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v64 = atomic64_read(&alg->compress_tlen);
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rcomp.stat_compress_tlen = v64;
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v32 = atomic_read(&alg->decompress_cnt);
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rcomp.stat_decompress_cnt = v32;
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v64 = atomic64_read(&alg->decompress_tlen);
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rcomp.stat_decompress_tlen = v64;
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v32 = atomic_read(&alg->cipher_err_cnt);
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rcomp.stat_compress_err_cnt = v32;
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if (nla_put(skb, CRYPTOCFGA_STAT_COMPRESS,
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sizeof(struct crypto_stat), &rcomp))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_stat racomp;
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u64 v64;
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u32 v32;
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strlcpy(racomp.type, "acomp", sizeof(racomp.type));
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v32 = atomic_read(&alg->compress_cnt);
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racomp.stat_compress_cnt = v32;
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v64 = atomic64_read(&alg->compress_tlen);
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racomp.stat_compress_tlen = v64;
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v32 = atomic_read(&alg->decompress_cnt);
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racomp.stat_decompress_cnt = v32;
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v64 = atomic64_read(&alg->decompress_tlen);
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racomp.stat_decompress_tlen = v64;
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v32 = atomic_read(&alg->cipher_err_cnt);
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racomp.stat_compress_err_cnt = v32;
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if (nla_put(skb, CRYPTOCFGA_STAT_ACOMP,
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sizeof(struct crypto_stat), &racomp))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_stat rakcipher;
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u64 v64;
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u32 v32;
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strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
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v32 = atomic_read(&alg->encrypt_cnt);
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rakcipher.stat_encrypt_cnt = v32;
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v64 = atomic64_read(&alg->encrypt_tlen);
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rakcipher.stat_encrypt_tlen = v64;
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v32 = atomic_read(&alg->decrypt_cnt);
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rakcipher.stat_decrypt_cnt = v32;
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v64 = atomic64_read(&alg->decrypt_tlen);
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rakcipher.stat_decrypt_tlen = v64;
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v32 = atomic_read(&alg->sign_cnt);
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rakcipher.stat_sign_cnt = v32;
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v32 = atomic_read(&alg->verify_cnt);
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rakcipher.stat_verify_cnt = v32;
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v32 = atomic_read(&alg->akcipher_err_cnt);
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rakcipher.stat_akcipher_err_cnt = v32;
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if (nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
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sizeof(struct crypto_stat), &rakcipher))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_stat rkpp;
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u32 v;
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strlcpy(rkpp.type, "kpp", sizeof(rkpp.type));
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v = atomic_read(&alg->setsecret_cnt);
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rkpp.stat_setsecret_cnt = v;
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v = atomic_read(&alg->generate_public_key_cnt);
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rkpp.stat_generate_public_key_cnt = v;
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v = atomic_read(&alg->compute_shared_secret_cnt);
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rkpp.stat_compute_shared_secret_cnt = v;
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v = atomic_read(&alg->kpp_err_cnt);
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rkpp.stat_kpp_err_cnt = v;
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if (nla_put(skb, CRYPTOCFGA_STAT_KPP,
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sizeof(struct crypto_stat), &rkpp))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_ahash(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_stat rhash;
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u64 v64;
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u32 v32;
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strncpy(rhash.type, "ahash", sizeof(rhash.type));
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v32 = atomic_read(&alg->hash_cnt);
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rhash.stat_hash_cnt = v32;
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v64 = atomic64_read(&alg->hash_tlen);
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rhash.stat_hash_tlen = v64;
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v32 = atomic_read(&alg->hash_err_cnt);
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rhash.stat_hash_err_cnt = v32;
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if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
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sizeof(struct crypto_stat), &rhash))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_shash(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_stat rhash;
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u64 v64;
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u32 v32;
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strncpy(rhash.type, "shash", sizeof(rhash.type));
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v32 = atomic_read(&alg->hash_cnt);
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rhash.stat_hash_cnt = v32;
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v64 = atomic64_read(&alg->hash_tlen);
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rhash.stat_hash_tlen = v64;
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v32 = atomic_read(&alg->hash_err_cnt);
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rhash.stat_hash_err_cnt = v32;
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if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
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sizeof(struct crypto_stat), &rhash))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_report_rng(struct sk_buff *skb, struct crypto_alg *alg)
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{
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struct crypto_stat rrng;
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u64 v64;
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u32 v32;
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strncpy(rrng.type, "rng", sizeof(rrng.type));
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v32 = atomic_read(&alg->generate_cnt);
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rrng.stat_generate_cnt = v32;
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v64 = atomic64_read(&alg->generate_tlen);
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rrng.stat_generate_tlen = v64;
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v32 = atomic_read(&alg->seed_cnt);
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rrng.stat_seed_cnt = v32;
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v32 = atomic_read(&alg->hash_err_cnt);
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rrng.stat_rng_err_cnt = v32;
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if (nla_put(skb, CRYPTOCFGA_STAT_RNG,
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sizeof(struct crypto_stat), &rrng))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_reportstat_one(struct crypto_alg *alg,
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struct crypto_user_alg *ualg,
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struct sk_buff *skb)
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{
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strlcpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
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strlcpy(ualg->cru_driver_name, alg->cra_driver_name,
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sizeof(ualg->cru_driver_name));
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strlcpy(ualg->cru_module_name, module_name(alg->cra_module),
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sizeof(ualg->cru_module_name));
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ualg->cru_type = 0;
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ualg->cru_mask = 0;
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ualg->cru_flags = alg->cra_flags;
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ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);
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if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
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goto nla_put_failure;
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if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
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struct crypto_stat rl;
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strlcpy(rl.type, "larval", sizeof(rl.type));
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if (nla_put(skb, CRYPTOCFGA_STAT_LARVAL,
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sizeof(struct crypto_stat), &rl))
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goto nla_put_failure;
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goto out;
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}
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switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
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case CRYPTO_ALG_TYPE_AEAD:
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if (crypto_report_aead(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_SKCIPHER:
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if (crypto_report_cipher(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_BLKCIPHER:
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if (crypto_report_cipher(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_CIPHER:
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if (crypto_report_cipher(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_COMPRESS:
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if (crypto_report_comp(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_ACOMPRESS:
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if (crypto_report_acomp(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_SCOMPRESS:
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if (crypto_report_acomp(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_AKCIPHER:
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if (crypto_report_akcipher(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_KPP:
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if (crypto_report_kpp(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_AHASH:
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if (crypto_report_ahash(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_HASH:
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if (crypto_report_shash(skb, alg))
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goto nla_put_failure;
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break;
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case CRYPTO_ALG_TYPE_RNG:
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if (crypto_report_rng(skb, alg))
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goto nla_put_failure;
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break;
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default:
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pr_err("ERROR: Unhandled alg %d in %s\n",
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alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL),
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__func__);
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}
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out:
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static int crypto_reportstat_alg(struct crypto_alg *alg,
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struct crypto_dump_info *info)
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{
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struct sk_buff *in_skb = info->in_skb;
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struct sk_buff *skb = info->out_skb;
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struct nlmsghdr *nlh;
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struct crypto_user_alg *ualg;
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int err = 0;
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nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq,
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CRYPTO_MSG_GETSTAT, sizeof(*ualg), info->nlmsg_flags);
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if (!nlh) {
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err = -EMSGSIZE;
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goto out;
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}
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ualg = nlmsg_data(nlh);
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err = crypto_reportstat_one(alg, ualg, skb);
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if (err) {
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nlmsg_cancel(skb, nlh);
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goto out;
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}
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nlmsg_end(skb, nlh);
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out:
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return err;
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}
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int crypto_reportstat(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
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struct nlattr **attrs)
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{
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struct crypto_user_alg *p = nlmsg_data(in_nlh);
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struct crypto_alg *alg;
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struct sk_buff *skb;
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struct crypto_dump_info info;
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int err;
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if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
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return -EINVAL;
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alg = crypto_alg_match(p, 0);
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if (!alg)
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return -ENOENT;
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err = -ENOMEM;
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skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
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if (!skb)
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goto drop_alg;
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info.in_skb = in_skb;
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info.out_skb = skb;
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info.nlmsg_seq = in_nlh->nlmsg_seq;
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info.nlmsg_flags = 0;
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err = crypto_reportstat_alg(alg, &info);
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drop_alg:
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crypto_mod_put(alg);
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if (err)
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return err;
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return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
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}
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int crypto_dump_reportstat(struct sk_buff *skb, struct netlink_callback *cb)
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{
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struct crypto_alg *alg;
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struct crypto_dump_info info;
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int err;
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if (cb->args[0])
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goto out;
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cb->args[0] = 1;
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info.in_skb = cb->skb;
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info.out_skb = skb;
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info.nlmsg_seq = cb->nlh->nlmsg_seq;
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info.nlmsg_flags = NLM_F_MULTI;
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list_for_each_entry(alg, &crypto_alg_list, cra_list) {
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err = crypto_reportstat_alg(alg, &info);
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if (err)
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goto out_err;
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}
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out:
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return skb->len;
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out_err:
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return err;
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}
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int crypto_dump_reportstat_done(struct netlink_callback *cb)
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{
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return 0;
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}
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MODULE_LICENSE("GPL");
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