diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/crypto/algif_hash.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/crypto/algif_hash.c')
-rw-r--r-- | kernel/crypto/algif_hash.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/kernel/crypto/algif_hash.c b/kernel/crypto/algif_hash.c new file mode 100644 index 000000000..1396ad078 --- /dev/null +++ b/kernel/crypto/algif_hash.c @@ -0,0 +1,313 @@ +/* + * algif_hash: User-space interface for hash algorithms + * + * This file provides the user-space API for hash algorithms. + * + * Copyright (c) 2010 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 <crypto/hash.h> +#include <crypto/if_alg.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/net.h> +#include <net/sock.h> + +struct hash_ctx { + struct af_alg_sgl sgl; + + u8 *result; + + struct af_alg_completion completion; + + unsigned int len; + bool more; + + struct ahash_request req; +}; + +static int hash_sendmsg(struct socket *sock, struct msghdr *msg, + size_t ignored) +{ + int limit = ALG_MAX_PAGES * PAGE_SIZE; + struct sock *sk = sock->sk; + struct alg_sock *ask = alg_sk(sk); + struct hash_ctx *ctx = ask->private; + long copied = 0; + int err; + + if (limit > sk->sk_sndbuf) + limit = sk->sk_sndbuf; + + lock_sock(sk); + if (!ctx->more) { + err = crypto_ahash_init(&ctx->req); + if (err) + goto unlock; + } + + ctx->more = 0; + + while (msg_data_left(msg)) { + int len = msg_data_left(msg); + + if (len > limit) + len = limit; + + len = af_alg_make_sg(&ctx->sgl, &msg->msg_iter, len); + if (len < 0) { + err = copied ? 0 : len; + goto unlock; + } + + ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, NULL, len); + + err = af_alg_wait_for_completion(crypto_ahash_update(&ctx->req), + &ctx->completion); + af_alg_free_sg(&ctx->sgl); + if (err) + goto unlock; + + copied += len; + iov_iter_advance(&msg->msg_iter, len); + } + + err = 0; + + ctx->more = msg->msg_flags & MSG_MORE; + if (!ctx->more) { + ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0); + err = af_alg_wait_for_completion(crypto_ahash_final(&ctx->req), + &ctx->completion); + } + +unlock: + release_sock(sk); + + return err ?: copied; +} + +static ssize_t hash_sendpage(struct socket *sock, struct page *page, + int offset, size_t size, int flags) +{ + struct sock *sk = sock->sk; + struct alg_sock *ask = alg_sk(sk); + struct hash_ctx *ctx = ask->private; + int err; + + if (flags & MSG_SENDPAGE_NOTLAST) + flags |= MSG_MORE; + + lock_sock(sk); + sg_init_table(ctx->sgl.sg, 1); + sg_set_page(ctx->sgl.sg, page, size, offset); + + ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, ctx->result, size); + + if (!(flags & MSG_MORE)) { + if (ctx->more) + err = crypto_ahash_finup(&ctx->req); + else + err = crypto_ahash_digest(&ctx->req); + } else { + if (!ctx->more) { + err = crypto_ahash_init(&ctx->req); + if (err) + goto unlock; + } + + err = crypto_ahash_update(&ctx->req); + } + + err = af_alg_wait_for_completion(err, &ctx->completion); + if (err) + goto unlock; + + ctx->more = flags & MSG_MORE; + +unlock: + release_sock(sk); + + return err ?: size; +} + +static int hash_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + int flags) +{ + struct sock *sk = sock->sk; + struct alg_sock *ask = alg_sk(sk); + struct hash_ctx *ctx = ask->private; + unsigned ds = crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)); + int err; + + if (len > ds) + len = ds; + else if (len < ds) + msg->msg_flags |= MSG_TRUNC; + + lock_sock(sk); + if (ctx->more) { + ctx->more = 0; + ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0); + err = af_alg_wait_for_completion(crypto_ahash_final(&ctx->req), + &ctx->completion); + if (err) + goto unlock; + } + + err = memcpy_to_msg(msg, ctx->result, len); + +unlock: + release_sock(sk); + + return err ?: len; +} + +static int hash_accept(struct socket *sock, struct socket *newsock, int flags) +{ + struct sock *sk = sock->sk; + struct alg_sock *ask = alg_sk(sk); + struct hash_ctx *ctx = ask->private; + struct ahash_request *req = &ctx->req; + char state[crypto_ahash_statesize(crypto_ahash_reqtfm(req))]; + struct sock *sk2; + struct alg_sock *ask2; + struct hash_ctx *ctx2; + int err; + + err = crypto_ahash_export(req, state); + if (err) + return err; + + err = af_alg_accept(ask->parent, newsock); + if (err) + return err; + + sk2 = newsock->sk; + ask2 = alg_sk(sk2); + ctx2 = ask2->private; + ctx2->more = 1; + + err = crypto_ahash_import(&ctx2->req, state); + if (err) { + sock_orphan(sk2); + sock_put(sk2); + } + + return err; +} + +static struct proto_ops algif_hash_ops = { + .family = PF_ALG, + + .connect = sock_no_connect, + .socketpair = sock_no_socketpair, + .getname = sock_no_getname, + .ioctl = sock_no_ioctl, + .listen = sock_no_listen, + .shutdown = sock_no_shutdown, + .getsockopt = sock_no_getsockopt, + .mmap = sock_no_mmap, + .bind = sock_no_bind, + .setsockopt = sock_no_setsockopt, + .poll = sock_no_poll, + + .release = af_alg_release, + .sendmsg = hash_sendmsg, + .sendpage = hash_sendpage, + .recvmsg = hash_recvmsg, + .accept = hash_accept, +}; + +static void *hash_bind(const char *name, u32 type, u32 mask) +{ + return crypto_alloc_ahash(name, type, mask); +} + +static void hash_release(void *private) +{ + crypto_free_ahash(private); +} + +static int hash_setkey(void *private, const u8 *key, unsigned int keylen) +{ + return crypto_ahash_setkey(private, key, keylen); +} + +static void hash_sock_destruct(struct sock *sk) +{ + struct alg_sock *ask = alg_sk(sk); + struct hash_ctx *ctx = ask->private; + + sock_kzfree_s(sk, ctx->result, + crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req))); + sock_kfree_s(sk, ctx, ctx->len); + af_alg_release_parent(sk); +} + +static int hash_accept_parent(void *private, struct sock *sk) +{ + struct hash_ctx *ctx; + struct alg_sock *ask = alg_sk(sk); + unsigned len = sizeof(*ctx) + crypto_ahash_reqsize(private); + unsigned ds = crypto_ahash_digestsize(private); + + ctx = sock_kmalloc(sk, len, GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->result = sock_kmalloc(sk, ds, GFP_KERNEL); + if (!ctx->result) { + sock_kfree_s(sk, ctx, len); + return -ENOMEM; + } + + memset(ctx->result, 0, ds); + + ctx->len = len; + ctx->more = 0; + af_alg_init_completion(&ctx->completion); + + ask->private = ctx; + + ahash_request_set_tfm(&ctx->req, private); + ahash_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG, + af_alg_complete, &ctx->completion); + + sk->sk_destruct = hash_sock_destruct; + + return 0; +} + +static const struct af_alg_type algif_type_hash = { + .bind = hash_bind, + .release = hash_release, + .setkey = hash_setkey, + .accept = hash_accept_parent, + .ops = &algif_hash_ops, + .name = "hash", + .owner = THIS_MODULE +}; + +static int __init algif_hash_init(void) +{ + return af_alg_register_type(&algif_type_hash); +} + +static void __exit algif_hash_exit(void) +{ + int err = af_alg_unregister_type(&algif_type_hash); + BUG_ON(err); +} + +module_init(algif_hash_init); +module_exit(algif_hash_exit); +MODULE_LICENSE("GPL"); |