2010-10-19 21:31:55 +08:00
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/*
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* algif_skcipher: User-space interface for skcipher algorithms
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*
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* This file provides the user-space API for symmetric key ciphers.
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*
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* Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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2017-06-25 23:12:39 +08:00
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* The following concept of the memory management is used:
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*
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* The kernel maintains two SGLs, the TX SGL and the RX SGL. The TX SGL is
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* filled by user space with the data submitted via sendpage/sendmsg. Filling
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* up the TX SGL does not cause a crypto operation -- the data will only be
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* tracked by the kernel. Upon receipt of one recvmsg call, the caller must
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* provide a buffer which is tracked with the RX SGL.
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*
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* During the processing of the recvmsg operation, the cipher request is
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* allocated and prepared. As part of the recvmsg operation, the processed
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* TX buffers are extracted from the TX SGL into a separate SGL.
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*
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* After the completion of the crypto operation, the RX SGL and the cipher
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* request is released. The extracted TX SGL parts are released together with
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* the RX SGL release.
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2010-10-19 21:31:55 +08:00
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*/
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#include <crypto/scatterwalk.h>
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#include <crypto/skcipher.h>
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#include <crypto/if_alg.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/kernel.h>
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2017-02-03 02:15:33 +08:00
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#include <linux/sched/signal.h>
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2010-10-19 21:31:55 +08:00
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/net.h>
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#include <net/sock.h>
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2017-06-25 23:12:39 +08:00
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struct skcipher_tsgl {
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2010-10-19 21:31:55 +08:00
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struct list_head list;
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int cur;
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struct scatterlist sg[0];
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};
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2017-06-25 23:12:39 +08:00
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struct skcipher_rsgl {
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struct af_alg_sgl sgl;
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struct list_head list;
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size_t sg_num_bytes;
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};
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struct skcipher_async_req {
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struct kiocb *iocb;
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struct sock *sk;
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struct skcipher_rsgl first_sgl;
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struct list_head rsgl_list;
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struct scatterlist *tsgl;
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unsigned int tsgl_entries;
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unsigned int areqlen;
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struct skcipher_request req;
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};
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2015-12-25 15:40:05 +08:00
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struct skcipher_tfm {
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struct crypto_skcipher *skcipher;
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bool has_key;
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};
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2010-10-19 21:31:55 +08:00
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struct skcipher_ctx {
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2017-06-25 23:12:39 +08:00
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struct list_head tsgl_list;
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2010-10-19 21:31:55 +08:00
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void *iv;
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struct af_alg_completion completion;
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2015-10-23 20:10:36 +08:00
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size_t used;
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2017-06-25 23:12:39 +08:00
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size_t rcvused;
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2010-10-19 21:31:55 +08:00
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bool more;
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bool merge;
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bool enc;
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2017-06-25 23:12:39 +08:00
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unsigned int len;
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2015-03-20 03:31:40 +08:00
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};
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2017-06-25 23:12:39 +08:00
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#define MAX_SGL_ENTS ((4096 - sizeof(struct skcipher_tsgl)) / \
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2010-10-19 21:31:55 +08:00
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sizeof(struct scatterlist) - 1)
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2017-06-25 23:12:39 +08:00
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static inline int skcipher_sndbuf(struct sock *sk)
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2015-03-20 03:31:40 +08:00
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{
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2017-06-25 23:12:39 +08:00
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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2015-03-20 03:31:40 +08:00
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2017-06-25 23:12:39 +08:00
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return max_t(int, max_t(int, sk->sk_sndbuf & PAGE_MASK, PAGE_SIZE) -
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ctx->used, 0);
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2015-03-20 03:31:40 +08:00
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}
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2017-06-25 23:12:39 +08:00
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static inline bool skcipher_writable(struct sock *sk)
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2015-03-20 03:31:40 +08:00
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{
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2017-06-25 23:12:39 +08:00
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return PAGE_SIZE <= skcipher_sndbuf(sk);
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2015-03-20 03:31:40 +08:00
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}
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2017-06-25 23:12:39 +08:00
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static inline int skcipher_rcvbuf(struct sock *sk)
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2010-10-19 21:31:55 +08:00
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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2017-06-25 23:12:39 +08:00
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return max_t(int, max_t(int, sk->sk_rcvbuf & PAGE_MASK, PAGE_SIZE) -
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ctx->rcvused, 0);
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2010-11-30 16:49:02 +08:00
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}
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2017-06-25 23:12:39 +08:00
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static inline bool skcipher_readable(struct sock *sk)
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2010-11-30 16:49:02 +08:00
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{
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2017-06-25 23:12:39 +08:00
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return PAGE_SIZE <= skcipher_rcvbuf(sk);
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2010-10-19 21:31:55 +08:00
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}
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2017-06-25 23:12:39 +08:00
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static int skcipher_alloc_tsgl(struct sock *sk)
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2010-10-19 21:31:55 +08:00
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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2017-06-25 23:12:39 +08:00
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struct skcipher_tsgl *sgl;
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2010-10-19 21:31:55 +08:00
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struct scatterlist *sg = NULL;
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2017-06-25 23:12:39 +08:00
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sgl = list_entry(ctx->tsgl_list.prev, struct skcipher_tsgl, list);
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if (!list_empty(&ctx->tsgl_list))
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2010-10-19 21:31:55 +08:00
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sg = sgl->sg;
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if (!sg || sgl->cur >= MAX_SGL_ENTS) {
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sgl = sock_kmalloc(sk, sizeof(*sgl) +
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sizeof(sgl->sg[0]) * (MAX_SGL_ENTS + 1),
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GFP_KERNEL);
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if (!sgl)
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return -ENOMEM;
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sg_init_table(sgl->sg, MAX_SGL_ENTS + 1);
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sgl->cur = 0;
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if (sg)
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2015-08-08 00:15:13 +08:00
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sg_chain(sg, MAX_SGL_ENTS + 1, sgl->sg);
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2010-10-19 21:31:55 +08:00
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2017-06-25 23:12:39 +08:00
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list_add_tail(&sgl->list, &ctx->tsgl_list);
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2010-10-19 21:31:55 +08:00
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}
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return 0;
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}
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2017-06-25 23:12:39 +08:00
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static unsigned int skcipher_count_tsgl(struct sock *sk, size_t bytes)
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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struct skcipher_tsgl *sgl, *tmp;
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unsigned int i;
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unsigned int sgl_count = 0;
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if (!bytes)
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return 0;
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list_for_each_entry_safe(sgl, tmp, &ctx->tsgl_list, list) {
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struct scatterlist *sg = sgl->sg;
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for (i = 0; i < sgl->cur; i++) {
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sgl_count++;
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if (sg[i].length >= bytes)
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return sgl_count;
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bytes -= sg[i].length;
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}
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}
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return sgl_count;
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}
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static void skcipher_pull_tsgl(struct sock *sk, size_t used,
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struct scatterlist *dst)
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2010-10-19 21:31:55 +08:00
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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2017-06-25 23:12:39 +08:00
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struct skcipher_tsgl *sgl;
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2010-10-19 21:31:55 +08:00
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struct scatterlist *sg;
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2017-06-25 23:12:39 +08:00
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unsigned int i;
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2010-10-19 21:31:55 +08:00
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2017-06-25 23:12:39 +08:00
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while (!list_empty(&ctx->tsgl_list)) {
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sgl = list_first_entry(&ctx->tsgl_list, struct skcipher_tsgl,
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2010-10-19 21:31:55 +08:00
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list);
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sg = sgl->sg;
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for (i = 0; i < sgl->cur; i++) {
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2015-10-23 20:10:36 +08:00
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size_t plen = min_t(size_t, used, sg[i].length);
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2017-06-25 23:12:39 +08:00
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struct page *page = sg_page(sg + i);
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2010-10-19 21:31:55 +08:00
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2017-06-25 23:12:39 +08:00
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if (!page)
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2010-10-19 21:31:55 +08:00
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continue;
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2017-06-25 23:12:39 +08:00
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/*
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* Assumption: caller created skcipher_count_tsgl(len)
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* SG entries in dst.
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*/
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if (dst)
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sg_set_page(dst + i, page, plen, sg[i].offset);
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2010-10-19 21:31:55 +08:00
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sg[i].length -= plen;
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sg[i].offset += plen;
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used -= plen;
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ctx->used -= plen;
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if (sg[i].length)
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return;
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2017-06-25 23:12:39 +08:00
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if (!dst)
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put_page(page);
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2010-10-19 21:31:55 +08:00
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sg_assign_page(sg + i, NULL);
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}
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list_del(&sgl->list);
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2017-06-25 23:12:39 +08:00
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sock_kfree_s(sk, sgl, sizeof(*sgl) + sizeof(sgl->sg[0]) *
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(MAX_SGL_ENTS + 1));
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2010-10-19 21:31:55 +08:00
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}
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if (!ctx->used)
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ctx->merge = 0;
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}
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2017-06-25 23:12:39 +08:00
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static void skcipher_free_areq_sgls(struct skcipher_async_req *areq)
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2010-10-19 21:31:55 +08:00
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{
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2017-06-25 23:12:39 +08:00
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struct sock *sk = areq->sk;
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2010-10-19 21:31:55 +08:00
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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2017-06-25 23:12:39 +08:00
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struct skcipher_rsgl *rsgl, *tmp;
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struct scatterlist *tsgl;
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struct scatterlist *sg;
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unsigned int i;
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list_for_each_entry_safe(rsgl, tmp, &areq->rsgl_list, list) {
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ctx->rcvused -= rsgl->sg_num_bytes;
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af_alg_free_sg(&rsgl->sgl);
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list_del(&rsgl->list);
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if (rsgl != &areq->first_sgl)
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sock_kfree_s(sk, rsgl, sizeof(*rsgl));
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}
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tsgl = areq->tsgl;
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for_each_sg(tsgl, sg, areq->tsgl_entries, i) {
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if (!sg_page(sg))
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continue;
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put_page(sg_page(sg));
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}
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2010-10-19 21:31:55 +08:00
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2017-06-25 23:12:39 +08:00
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if (areq->tsgl && areq->tsgl_entries)
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sock_kfree_s(sk, tsgl, areq->tsgl_entries * sizeof(*tsgl));
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2010-10-19 21:31:55 +08:00
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}
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static int skcipher_wait_for_wmem(struct sock *sk, unsigned flags)
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{
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2016-11-12 02:20:50 +08:00
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DEFINE_WAIT_FUNC(wait, woken_wake_function);
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2010-10-19 21:31:55 +08:00
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int err = -ERESTARTSYS;
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2016-11-12 02:20:50 +08:00
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long timeout;
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2010-10-19 21:31:55 +08:00
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if (flags & MSG_DONTWAIT)
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return -EAGAIN;
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2015-11-30 12:03:10 +08:00
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sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
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2010-10-19 21:31:55 +08:00
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2016-11-12 02:20:50 +08:00
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add_wait_queue(sk_sleep(sk), &wait);
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2010-10-19 21:31:55 +08:00
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for (;;) {
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if (signal_pending(current))
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break;
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timeout = MAX_SCHEDULE_TIMEOUT;
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2016-11-12 02:20:50 +08:00
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if (sk_wait_event(sk, &timeout, skcipher_writable(sk), &wait)) {
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2010-10-19 21:31:55 +08:00
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err = 0;
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break;
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}
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}
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2016-11-12 02:20:50 +08:00
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remove_wait_queue(sk_sleep(sk), &wait);
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2010-10-19 21:31:55 +08:00
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return err;
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}
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static void skcipher_wmem_wakeup(struct sock *sk)
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{
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struct socket_wq *wq;
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if (!skcipher_writable(sk))
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return;
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rcu_read_lock();
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wq = rcu_dereference(sk->sk_wq);
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2015-11-26 13:55:39 +08:00
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if (skwq_has_sleeper(wq))
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2010-10-19 21:31:55 +08:00
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wake_up_interruptible_sync_poll(&wq->wait, POLLIN |
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POLLRDNORM |
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POLLRDBAND);
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sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
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rcu_read_unlock();
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}
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static int skcipher_wait_for_data(struct sock *sk, unsigned flags)
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{
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2016-11-12 02:20:50 +08:00
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DEFINE_WAIT_FUNC(wait, woken_wake_function);
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2010-10-19 21:31:55 +08:00
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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long timeout;
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int err = -ERESTARTSYS;
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if (flags & MSG_DONTWAIT) {
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return -EAGAIN;
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}
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2015-11-30 12:03:10 +08:00
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sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
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2010-10-19 21:31:55 +08:00
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2016-11-12 02:20:50 +08:00
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add_wait_queue(sk_sleep(sk), &wait);
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2010-10-19 21:31:55 +08:00
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for (;;) {
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if (signal_pending(current))
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break;
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|
|
|
timeout = MAX_SCHEDULE_TIMEOUT;
|
2016-11-12 02:20:50 +08:00
|
|
|
if (sk_wait_event(sk, &timeout, ctx->used, &wait)) {
|
2010-10-19 21:31:55 +08:00
|
|
|
err = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
2016-11-12 02:20:50 +08:00
|
|
|
remove_wait_queue(sk_sleep(sk), &wait);
|
2010-10-19 21:31:55 +08:00
|
|
|
|
2015-11-30 12:03:10 +08:00
|
|
|
sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
|
2010-10-19 21:31:55 +08:00
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void skcipher_data_wakeup(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
|
|
struct socket_wq *wq;
|
|
|
|
|
|
|
|
if (!ctx->used)
|
|
|
|
return;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
wq = rcu_dereference(sk->sk_wq);
|
2015-11-26 13:55:39 +08:00
|
|
|
if (skwq_has_sleeper(wq))
|
2010-10-19 21:31:55 +08:00
|
|
|
wake_up_interruptible_sync_poll(&wq->wait, POLLOUT |
|
|
|
|
POLLRDNORM |
|
|
|
|
POLLRDBAND);
|
|
|
|
sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
|
|
|
|
rcu_read_unlock();
|
|
|
|
}
|
|
|
|
|
2015-03-02 15:37:48 +08:00
|
|
|
static int skcipher_sendmsg(struct socket *sock, struct msghdr *msg,
|
|
|
|
size_t size)
|
2010-10-19 21:31:55 +08:00
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct alg_sock *ask = alg_sk(sk);
|
2016-02-03 21:39:26 +08:00
|
|
|
struct sock *psk = ask->parent;
|
|
|
|
struct alg_sock *pask = alg_sk(psk);
|
2010-10-19 21:31:55 +08:00
|
|
|
struct skcipher_ctx *ctx = ask->private;
|
2016-02-03 21:39:26 +08:00
|
|
|
struct skcipher_tfm *skc = pask->private;
|
|
|
|
struct crypto_skcipher *tfm = skc->skcipher;
|
2015-12-18 19:16:57 +08:00
|
|
|
unsigned ivsize = crypto_skcipher_ivsize(tfm);
|
2017-06-25 23:12:39 +08:00
|
|
|
struct skcipher_tsgl *sgl;
|
2010-10-19 21:31:55 +08:00
|
|
|
struct af_alg_control con = {};
|
|
|
|
long copied = 0;
|
|
|
|
bool enc = 0;
|
2014-11-30 17:55:26 +08:00
|
|
|
bool init = 0;
|
2010-10-19 21:31:55 +08:00
|
|
|
int err;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (msg->msg_controllen) {
|
|
|
|
err = af_alg_cmsg_send(msg, &con);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2014-11-30 17:55:26 +08:00
|
|
|
init = 1;
|
2010-10-19 21:31:55 +08:00
|
|
|
switch (con.op) {
|
|
|
|
case ALG_OP_ENCRYPT:
|
|
|
|
enc = 1;
|
|
|
|
break;
|
|
|
|
case ALG_OP_DECRYPT:
|
|
|
|
enc = 0;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (con.iv && con.iv->ivlen != ivsize)
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = -EINVAL;
|
|
|
|
|
|
|
|
lock_sock(sk);
|
|
|
|
if (!ctx->more && ctx->used)
|
|
|
|
goto unlock;
|
|
|
|
|
2014-11-30 17:55:26 +08:00
|
|
|
if (init) {
|
2010-10-19 21:31:55 +08:00
|
|
|
ctx->enc = enc;
|
|
|
|
if (con.iv)
|
|
|
|
memcpy(ctx->iv, con.iv->iv, ivsize);
|
|
|
|
}
|
|
|
|
|
|
|
|
while (size) {
|
|
|
|
struct scatterlist *sg;
|
|
|
|
unsigned long len = size;
|
2015-10-23 20:10:36 +08:00
|
|
|
size_t plen;
|
2010-10-19 21:31:55 +08:00
|
|
|
|
|
|
|
if (ctx->merge) {
|
2017-06-25 23:12:39 +08:00
|
|
|
sgl = list_entry(ctx->tsgl_list.prev,
|
|
|
|
struct skcipher_tsgl, list);
|
2010-10-19 21:31:55 +08:00
|
|
|
sg = sgl->sg + sgl->cur - 1;
|
|
|
|
len = min_t(unsigned long, len,
|
|
|
|
PAGE_SIZE - sg->offset - sg->length);
|
|
|
|
|
2014-04-07 09:25:44 +08:00
|
|
|
err = memcpy_from_msg(page_address(sg_page(sg)) +
|
|
|
|
sg->offset + sg->length,
|
|
|
|
msg, len);
|
2010-10-19 21:31:55 +08:00
|
|
|
if (err)
|
|
|
|
goto unlock;
|
|
|
|
|
|
|
|
sg->length += len;
|
|
|
|
ctx->merge = (sg->offset + sg->length) &
|
|
|
|
(PAGE_SIZE - 1);
|
|
|
|
|
|
|
|
ctx->used += len;
|
|
|
|
copied += len;
|
|
|
|
size -= len;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2010-11-30 16:49:02 +08:00
|
|
|
if (!skcipher_writable(sk)) {
|
2010-10-19 21:31:55 +08:00
|
|
|
err = skcipher_wait_for_wmem(sk, msg->msg_flags);
|
|
|
|
if (err)
|
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
|
2010-11-30 16:49:02 +08:00
|
|
|
len = min_t(unsigned long, len, skcipher_sndbuf(sk));
|
2010-10-19 21:31:55 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
err = skcipher_alloc_tsgl(sk);
|
2010-10-19 21:31:55 +08:00
|
|
|
if (err)
|
|
|
|
goto unlock;
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
sgl = list_entry(ctx->tsgl_list.prev, struct skcipher_tsgl,
|
|
|
|
list);
|
2010-10-19 21:31:55 +08:00
|
|
|
sg = sgl->sg;
|
2016-01-19 21:23:57 +08:00
|
|
|
if (sgl->cur)
|
|
|
|
sg_unmark_end(sg + sgl->cur - 1);
|
2010-10-19 21:31:55 +08:00
|
|
|
do {
|
|
|
|
i = sgl->cur;
|
2015-10-23 20:10:36 +08:00
|
|
|
plen = min_t(size_t, len, PAGE_SIZE);
|
2010-10-19 21:31:55 +08:00
|
|
|
|
|
|
|
sg_assign_page(sg + i, alloc_page(GFP_KERNEL));
|
|
|
|
err = -ENOMEM;
|
|
|
|
if (!sg_page(sg + i))
|
|
|
|
goto unlock;
|
|
|
|
|
2014-04-07 09:25:44 +08:00
|
|
|
err = memcpy_from_msg(page_address(sg_page(sg + i)),
|
|
|
|
msg, plen);
|
2010-10-19 21:31:55 +08:00
|
|
|
if (err) {
|
|
|
|
__free_page(sg_page(sg + i));
|
|
|
|
sg_assign_page(sg + i, NULL);
|
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
sg[i].length = plen;
|
|
|
|
len -= plen;
|
|
|
|
ctx->used += plen;
|
|
|
|
copied += plen;
|
|
|
|
size -= plen;
|
|
|
|
sgl->cur++;
|
|
|
|
} while (len && sgl->cur < MAX_SGL_ENTS);
|
|
|
|
|
2014-12-09 04:03:42 +08:00
|
|
|
if (!size)
|
|
|
|
sg_mark_end(sg + sgl->cur - 1);
|
|
|
|
|
2010-10-19 21:31:55 +08:00
|
|
|
ctx->merge = plen & (PAGE_SIZE - 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
err = 0;
|
|
|
|
|
|
|
|
ctx->more = msg->msg_flags & MSG_MORE;
|
|
|
|
|
|
|
|
unlock:
|
|
|
|
skcipher_data_wakeup(sk);
|
|
|
|
release_sock(sk);
|
|
|
|
|
|
|
|
return copied ?: err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t skcipher_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 skcipher_ctx *ctx = ask->private;
|
2017-06-25 23:12:39 +08:00
|
|
|
struct skcipher_tsgl *sgl;
|
2010-10-19 21:31:55 +08:00
|
|
|
int err = -EINVAL;
|
|
|
|
|
2013-11-25 14:36:28 +08:00
|
|
|
if (flags & MSG_SENDPAGE_NOTLAST)
|
|
|
|
flags |= MSG_MORE;
|
|
|
|
|
2010-10-19 21:31:55 +08:00
|
|
|
lock_sock(sk);
|
|
|
|
if (!ctx->more && ctx->used)
|
|
|
|
goto unlock;
|
|
|
|
|
|
|
|
if (!size)
|
|
|
|
goto done;
|
|
|
|
|
2010-11-30 16:49:02 +08:00
|
|
|
if (!skcipher_writable(sk)) {
|
2010-10-19 21:31:55 +08:00
|
|
|
err = skcipher_wait_for_wmem(sk, flags);
|
|
|
|
if (err)
|
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
err = skcipher_alloc_tsgl(sk);
|
2010-10-19 21:31:55 +08:00
|
|
|
if (err)
|
|
|
|
goto unlock;
|
|
|
|
|
|
|
|
ctx->merge = 0;
|
2017-06-25 23:12:39 +08:00
|
|
|
sgl = list_entry(ctx->tsgl_list.prev, struct skcipher_tsgl, list);
|
2010-10-19 21:31:55 +08:00
|
|
|
|
2014-12-09 04:03:42 +08:00
|
|
|
if (sgl->cur)
|
|
|
|
sg_unmark_end(sgl->sg + sgl->cur - 1);
|
|
|
|
|
|
|
|
sg_mark_end(sgl->sg + sgl->cur);
|
2010-10-19 21:31:55 +08:00
|
|
|
get_page(page);
|
|
|
|
sg_set_page(sgl->sg + sgl->cur, page, size, offset);
|
|
|
|
sgl->cur++;
|
|
|
|
ctx->used += size;
|
|
|
|
|
|
|
|
done:
|
|
|
|
ctx->more = flags & MSG_MORE;
|
|
|
|
|
|
|
|
unlock:
|
|
|
|
skcipher_data_wakeup(sk);
|
|
|
|
release_sock(sk);
|
|
|
|
|
|
|
|
return err ?: size;
|
|
|
|
}
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
static void skcipher_async_cb(struct crypto_async_request *req, int err)
|
2015-03-20 03:31:40 +08:00
|
|
|
{
|
2017-06-25 23:12:39 +08:00
|
|
|
struct skcipher_async_req *areq = req->data;
|
|
|
|
struct sock *sk = areq->sk;
|
|
|
|
struct kiocb *iocb = areq->iocb;
|
|
|
|
unsigned int resultlen;
|
2015-03-20 03:31:40 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
lock_sock(sk);
|
2015-03-20 03:31:40 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
/* Buffer size written by crypto operation. */
|
|
|
|
resultlen = areq->req.cryptlen;
|
2015-03-20 03:31:40 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
skcipher_free_areq_sgls(areq);
|
|
|
|
sock_kfree_s(sk, areq, areq->areqlen);
|
|
|
|
__sock_put(sk);
|
|
|
|
|
|
|
|
iocb->ki_complete(iocb, err ? err : resultlen, 0);
|
|
|
|
|
|
|
|
release_sock(sk);
|
2015-03-20 03:31:40 +08:00
|
|
|
}
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
static int _skcipher_recvmsg(struct socket *sock, struct msghdr *msg,
|
|
|
|
size_t ignored, int flags)
|
2015-03-20 03:31:40 +08:00
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct alg_sock *ask = alg_sk(sk);
|
2016-02-03 21:39:24 +08:00
|
|
|
struct sock *psk = ask->parent;
|
|
|
|
struct alg_sock *pask = alg_sk(psk);
|
2015-03-20 03:31:40 +08:00
|
|
|
struct skcipher_ctx *ctx = ask->private;
|
2016-02-03 21:39:24 +08:00
|
|
|
struct skcipher_tfm *skc = pask->private;
|
|
|
|
struct crypto_skcipher *tfm = skc->skcipher;
|
2017-06-25 23:12:39 +08:00
|
|
|
unsigned int bs = crypto_skcipher_blocksize(tfm);
|
|
|
|
unsigned int areqlen = sizeof(struct skcipher_async_req) +
|
|
|
|
crypto_skcipher_reqsize(tfm);
|
|
|
|
struct skcipher_async_req *areq;
|
|
|
|
struct skcipher_rsgl *last_rsgl = NULL;
|
|
|
|
int err = 0;
|
|
|
|
size_t len = 0;
|
2016-02-03 21:39:24 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
/* Allocate cipher request for current operation. */
|
|
|
|
areq = sock_kmalloc(sk, areqlen, GFP_KERNEL);
|
|
|
|
if (unlikely(!areq))
|
|
|
|
return -ENOMEM;
|
|
|
|
areq->areqlen = areqlen;
|
|
|
|
areq->sk = sk;
|
|
|
|
INIT_LIST_HEAD(&areq->rsgl_list);
|
|
|
|
areq->tsgl = NULL;
|
|
|
|
areq->tsgl_entries = 0;
|
2015-03-20 03:31:40 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
/* convert iovecs of output buffers into RX SGL */
|
|
|
|
while (msg_data_left(msg)) {
|
|
|
|
struct skcipher_rsgl *rsgl;
|
|
|
|
size_t seglen;
|
|
|
|
|
|
|
|
/* limit the amount of readable buffers */
|
|
|
|
if (!skcipher_readable(sk))
|
|
|
|
break;
|
2015-03-20 03:31:40 +08:00
|
|
|
|
|
|
|
if (!ctx->used) {
|
|
|
|
err = skcipher_wait_for_data(sk, flags);
|
|
|
|
if (err)
|
|
|
|
goto free;
|
|
|
|
}
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
seglen = min_t(size_t, ctx->used, msg_data_left(msg));
|
2015-03-20 03:31:40 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
if (list_empty(&areq->rsgl_list)) {
|
|
|
|
rsgl = &areq->first_sgl;
|
2015-03-20 03:31:40 +08:00
|
|
|
} else {
|
2017-06-25 23:12:39 +08:00
|
|
|
rsgl = sock_kmalloc(sk, sizeof(*rsgl), GFP_KERNEL);
|
2015-03-20 03:31:40 +08:00
|
|
|
if (!rsgl) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
goto free;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
rsgl->sgl.npages = 0;
|
|
|
|
list_add_tail(&rsgl->list, &areq->rsgl_list);
|
|
|
|
|
|
|
|
/* make one iovec available as scatterlist */
|
|
|
|
err = af_alg_make_sg(&rsgl->sgl, &msg->msg_iter, seglen);
|
|
|
|
if (err < 0)
|
2015-03-20 03:31:40 +08:00
|
|
|
goto free;
|
2017-06-25 23:12:39 +08:00
|
|
|
|
|
|
|
/* chain the new scatterlist with previous one */
|
2015-03-20 03:31:40 +08:00
|
|
|
if (last_rsgl)
|
|
|
|
af_alg_link_sg(&last_rsgl->sgl, &rsgl->sgl);
|
|
|
|
|
|
|
|
last_rsgl = rsgl;
|
2017-06-25 23:12:39 +08:00
|
|
|
len += err;
|
|
|
|
ctx->rcvused += err;
|
|
|
|
rsgl->sg_num_bytes = err;
|
|
|
|
iov_iter_advance(&msg->msg_iter, err);
|
2015-03-20 03:31:40 +08:00
|
|
|
}
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
/* Process only as much RX buffers for which we have TX data */
|
|
|
|
if (len > ctx->used)
|
|
|
|
len = ctx->used;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If more buffers are to be expected to be processed, process only
|
|
|
|
* full block size buffers.
|
|
|
|
*/
|
|
|
|
if (ctx->more || len < ctx->used)
|
|
|
|
len -= len % bs;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Create a per request TX SGL for this request which tracks the
|
|
|
|
* SG entries from the global TX SGL.
|
|
|
|
*/
|
|
|
|
areq->tsgl_entries = skcipher_count_tsgl(sk, len);
|
|
|
|
if (!areq->tsgl_entries)
|
|
|
|
areq->tsgl_entries = 1;
|
|
|
|
areq->tsgl = sock_kmalloc(sk, sizeof(*areq->tsgl) * areq->tsgl_entries,
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!areq->tsgl) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
goto free;
|
|
|
|
}
|
|
|
|
sg_init_table(areq->tsgl, areq->tsgl_entries);
|
|
|
|
skcipher_pull_tsgl(sk, len, areq->tsgl);
|
|
|
|
|
|
|
|
/* Initialize the crypto operation */
|
|
|
|
skcipher_request_set_tfm(&areq->req, tfm);
|
|
|
|
skcipher_request_set_crypt(&areq->req, areq->tsgl,
|
|
|
|
areq->first_sgl.sgl.sg, len, ctx->iv);
|
|
|
|
|
|
|
|
if (msg->msg_iocb && !is_sync_kiocb(msg->msg_iocb)) {
|
|
|
|
/* AIO operation */
|
|
|
|
areq->iocb = msg->msg_iocb;
|
|
|
|
skcipher_request_set_callback(&areq->req,
|
|
|
|
CRYPTO_TFM_REQ_MAY_SLEEP,
|
|
|
|
skcipher_async_cb, areq);
|
|
|
|
err = ctx->enc ? crypto_skcipher_encrypt(&areq->req) :
|
|
|
|
crypto_skcipher_decrypt(&areq->req);
|
|
|
|
} else {
|
|
|
|
/* Synchronous operation */
|
|
|
|
skcipher_request_set_callback(&areq->req,
|
|
|
|
CRYPTO_TFM_REQ_MAY_SLEEP |
|
|
|
|
CRYPTO_TFM_REQ_MAY_BACKLOG,
|
|
|
|
af_alg_complete,
|
|
|
|
&ctx->completion);
|
|
|
|
err = af_alg_wait_for_completion(ctx->enc ?
|
|
|
|
crypto_skcipher_encrypt(&areq->req) :
|
|
|
|
crypto_skcipher_decrypt(&areq->req),
|
|
|
|
&ctx->completion);
|
|
|
|
}
|
2015-04-02 04:53:06 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
/* AIO operation in progress */
|
2015-03-20 03:31:40 +08:00
|
|
|
if (err == -EINPROGRESS) {
|
2017-06-25 23:12:39 +08:00
|
|
|
sock_hold(sk);
|
|
|
|
return -EIOCBQUEUED;
|
2015-03-20 03:31:40 +08:00
|
|
|
}
|
2017-06-25 23:12:39 +08:00
|
|
|
|
2015-03-20 03:31:40 +08:00
|
|
|
free:
|
2017-06-25 23:12:39 +08:00
|
|
|
skcipher_free_areq_sgls(areq);
|
|
|
|
if (areq)
|
|
|
|
sock_kfree_s(sk, areq, areqlen);
|
|
|
|
|
|
|
|
return err ? err : len;
|
2015-03-20 03:31:40 +08:00
|
|
|
}
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
static int skcipher_recvmsg(struct socket *sock, struct msghdr *msg,
|
|
|
|
size_t ignored, int flags)
|
2010-10-19 21:31:55 +08:00
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
2017-06-25 23:12:39 +08:00
|
|
|
int ret = 0;
|
2010-10-19 21:31:55 +08:00
|
|
|
|
|
|
|
lock_sock(sk);
|
2014-12-16 10:39:31 +08:00
|
|
|
while (msg_data_left(msg)) {
|
2017-06-25 23:12:39 +08:00
|
|
|
int err = _skcipher_recvmsg(sock, msg, ignored, flags);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This error covers -EIOCBQUEUED which implies that we can
|
|
|
|
* only handle one AIO request. If the caller wants to have
|
|
|
|
* multiple AIO requests in parallel, he must make multiple
|
|
|
|
* separate AIO calls.
|
|
|
|
*/
|
|
|
|
if (err <= 0) {
|
|
|
|
if (err == -EIOCBQUEUED)
|
|
|
|
ret = err;
|
|
|
|
goto out;
|
2014-11-29 05:39:25 +08:00
|
|
|
}
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
ret += err;
|
2010-10-19 21:31:55 +08:00
|
|
|
}
|
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
out:
|
2010-10-19 21:31:55 +08:00
|
|
|
skcipher_wmem_wakeup(sk);
|
|
|
|
release_sock(sk);
|
2017-06-25 23:12:39 +08:00
|
|
|
return ret;
|
2015-03-20 03:31:40 +08:00
|
|
|
}
|
2010-10-19 21:31:55 +08:00
|
|
|
|
|
|
|
static unsigned int skcipher_poll(struct file *file, struct socket *sock,
|
|
|
|
poll_table *wait)
|
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
|
|
unsigned int mask;
|
|
|
|
|
|
|
|
sock_poll_wait(file, sk_sleep(sk), wait);
|
|
|
|
mask = 0;
|
|
|
|
|
|
|
|
if (ctx->used)
|
|
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
|
|
|
|
if (skcipher_writable(sk))
|
|
|
|
mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
|
|
|
|
|
|
|
|
return mask;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct proto_ops algif_skcipher_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,
|
|
|
|
.accept = sock_no_accept,
|
|
|
|
.setsockopt = sock_no_setsockopt,
|
|
|
|
|
|
|
|
.release = af_alg_release,
|
|
|
|
.sendmsg = skcipher_sendmsg,
|
|
|
|
.sendpage = skcipher_sendpage,
|
|
|
|
.recvmsg = skcipher_recvmsg,
|
|
|
|
.poll = skcipher_poll,
|
|
|
|
};
|
|
|
|
|
2016-01-04 12:36:12 +08:00
|
|
|
static int skcipher_check_key(struct socket *sock)
|
|
|
|
{
|
2016-01-15 22:02:20 +08:00
|
|
|
int err = 0;
|
2016-01-04 12:36:12 +08:00
|
|
|
struct sock *psk;
|
|
|
|
struct alg_sock *pask;
|
|
|
|
struct skcipher_tfm *tfm;
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
|
|
|
2016-01-15 22:02:20 +08:00
|
|
|
lock_sock(sk);
|
2016-01-04 12:36:12 +08:00
|
|
|
if (ask->refcnt)
|
2016-01-15 22:02:20 +08:00
|
|
|
goto unlock_child;
|
2016-01-04 12:36:12 +08:00
|
|
|
|
|
|
|
psk = ask->parent;
|
|
|
|
pask = alg_sk(ask->parent);
|
|
|
|
tfm = pask->private;
|
|
|
|
|
|
|
|
err = -ENOKEY;
|
2016-01-15 22:02:20 +08:00
|
|
|
lock_sock_nested(psk, SINGLE_DEPTH_NESTING);
|
2016-01-04 12:36:12 +08:00
|
|
|
if (!tfm->has_key)
|
|
|
|
goto unlock;
|
|
|
|
|
|
|
|
if (!pask->refcnt++)
|
|
|
|
sock_hold(psk);
|
|
|
|
|
|
|
|
ask->refcnt = 1;
|
|
|
|
sock_put(psk);
|
|
|
|
|
|
|
|
err = 0;
|
|
|
|
|
|
|
|
unlock:
|
|
|
|
release_sock(psk);
|
2016-01-15 22:02:20 +08:00
|
|
|
unlock_child:
|
|
|
|
release_sock(sk);
|
2016-01-04 12:36:12 +08:00
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int skcipher_sendmsg_nokey(struct socket *sock, struct msghdr *msg,
|
|
|
|
size_t size)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = skcipher_check_key(sock);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
return skcipher_sendmsg(sock, msg, size);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t skcipher_sendpage_nokey(struct socket *sock, struct page *page,
|
|
|
|
int offset, size_t size, int flags)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = skcipher_check_key(sock);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
return skcipher_sendpage(sock, page, offset, size, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int skcipher_recvmsg_nokey(struct socket *sock, struct msghdr *msg,
|
|
|
|
size_t ignored, int flags)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = skcipher_check_key(sock);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
return skcipher_recvmsg(sock, msg, ignored, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct proto_ops algif_skcipher_ops_nokey = {
|
|
|
|
.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,
|
|
|
|
.accept = sock_no_accept,
|
|
|
|
.setsockopt = sock_no_setsockopt,
|
|
|
|
|
|
|
|
.release = af_alg_release,
|
|
|
|
.sendmsg = skcipher_sendmsg_nokey,
|
|
|
|
.sendpage = skcipher_sendpage_nokey,
|
|
|
|
.recvmsg = skcipher_recvmsg_nokey,
|
|
|
|
.poll = skcipher_poll,
|
|
|
|
};
|
|
|
|
|
2010-10-19 21:31:55 +08:00
|
|
|
static void *skcipher_bind(const char *name, u32 type, u32 mask)
|
|
|
|
{
|
2015-12-25 15:40:05 +08:00
|
|
|
struct skcipher_tfm *tfm;
|
|
|
|
struct crypto_skcipher *skcipher;
|
|
|
|
|
|
|
|
tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
|
|
|
|
if (!tfm)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
|
|
|
skcipher = crypto_alloc_skcipher(name, type, mask);
|
|
|
|
if (IS_ERR(skcipher)) {
|
|
|
|
kfree(tfm);
|
|
|
|
return ERR_CAST(skcipher);
|
|
|
|
}
|
|
|
|
|
|
|
|
tfm->skcipher = skcipher;
|
|
|
|
|
|
|
|
return tfm;
|
2010-10-19 21:31:55 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void skcipher_release(void *private)
|
|
|
|
{
|
2015-12-25 15:40:05 +08:00
|
|
|
struct skcipher_tfm *tfm = private;
|
|
|
|
|
|
|
|
crypto_free_skcipher(tfm->skcipher);
|
|
|
|
kfree(tfm);
|
2010-10-19 21:31:55 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int skcipher_setkey(void *private, const u8 *key, unsigned int keylen)
|
|
|
|
{
|
2015-12-25 15:40:05 +08:00
|
|
|
struct skcipher_tfm *tfm = private;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = crypto_skcipher_setkey(tfm->skcipher, key, keylen);
|
|
|
|
tfm->has_key = !err;
|
|
|
|
|
|
|
|
return err;
|
2010-10-19 21:31:55 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void skcipher_sock_destruct(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
|
|
struct skcipher_ctx *ctx = ask->private;
|
2017-06-25 23:12:39 +08:00
|
|
|
struct sock *psk = ask->parent;
|
|
|
|
struct alg_sock *pask = alg_sk(psk);
|
|
|
|
struct skcipher_tfm *skc = pask->private;
|
|
|
|
struct crypto_skcipher *tfm = skc->skcipher;
|
2015-03-20 03:31:40 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
skcipher_pull_tsgl(sk, ctx->used, NULL);
|
2015-12-18 19:16:57 +08:00
|
|
|
sock_kzfree_s(sk, ctx->iv, crypto_skcipher_ivsize(tfm));
|
2010-10-19 21:31:55 +08:00
|
|
|
sock_kfree_s(sk, ctx, ctx->len);
|
|
|
|
af_alg_release_parent(sk);
|
|
|
|
}
|
|
|
|
|
2016-01-13 15:01:06 +08:00
|
|
|
static int skcipher_accept_parent_nokey(void *private, struct sock *sk)
|
2010-10-19 21:31:55 +08:00
|
|
|
{
|
|
|
|
struct skcipher_ctx *ctx;
|
|
|
|
struct alg_sock *ask = alg_sk(sk);
|
2015-12-25 15:40:05 +08:00
|
|
|
struct skcipher_tfm *tfm = private;
|
|
|
|
struct crypto_skcipher *skcipher = tfm->skcipher;
|
2017-06-25 23:12:39 +08:00
|
|
|
unsigned int len = sizeof(*ctx);
|
2010-10-19 21:31:55 +08:00
|
|
|
|
|
|
|
ctx = sock_kmalloc(sk, len, GFP_KERNEL);
|
|
|
|
if (!ctx)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2015-12-25 15:40:05 +08:00
|
|
|
ctx->iv = sock_kmalloc(sk, crypto_skcipher_ivsize(skcipher),
|
2010-10-19 21:31:55 +08:00
|
|
|
GFP_KERNEL);
|
|
|
|
if (!ctx->iv) {
|
|
|
|
sock_kfree_s(sk, ctx, len);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2015-12-25 15:40:05 +08:00
|
|
|
memset(ctx->iv, 0, crypto_skcipher_ivsize(skcipher));
|
2010-10-19 21:31:55 +08:00
|
|
|
|
2017-06-25 23:12:39 +08:00
|
|
|
INIT_LIST_HEAD(&ctx->tsgl_list);
|
2010-10-19 21:31:55 +08:00
|
|
|
ctx->len = len;
|
|
|
|
ctx->used = 0;
|
2017-06-25 23:12:39 +08:00
|
|
|
ctx->rcvused = 0;
|
2010-10-19 21:31:55 +08:00
|
|
|
ctx->more = 0;
|
|
|
|
ctx->merge = 0;
|
|
|
|
ctx->enc = 0;
|
|
|
|
af_alg_init_completion(&ctx->completion);
|
|
|
|
|
|
|
|
ask->private = ctx;
|
|
|
|
|
|
|
|
sk->sk_destruct = skcipher_sock_destruct;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2016-01-04 12:36:12 +08:00
|
|
|
static int skcipher_accept_parent(void *private, struct sock *sk)
|
|
|
|
{
|
|
|
|
struct skcipher_tfm *tfm = private;
|
|
|
|
|
2016-01-11 21:29:41 +08:00
|
|
|
if (!tfm->has_key && crypto_skcipher_has_setkey(tfm->skcipher))
|
2016-01-04 12:36:12 +08:00
|
|
|
return -ENOKEY;
|
|
|
|
|
2016-01-13 15:01:06 +08:00
|
|
|
return skcipher_accept_parent_nokey(private, sk);
|
2016-01-04 12:36:12 +08:00
|
|
|
}
|
|
|
|
|
2010-10-19 21:31:55 +08:00
|
|
|
static const struct af_alg_type algif_type_skcipher = {
|
|
|
|
.bind = skcipher_bind,
|
|
|
|
.release = skcipher_release,
|
|
|
|
.setkey = skcipher_setkey,
|
|
|
|
.accept = skcipher_accept_parent,
|
2016-01-04 12:36:12 +08:00
|
|
|
.accept_nokey = skcipher_accept_parent_nokey,
|
2010-10-19 21:31:55 +08:00
|
|
|
.ops = &algif_skcipher_ops,
|
2016-01-04 12:36:12 +08:00
|
|
|
.ops_nokey = &algif_skcipher_ops_nokey,
|
2010-10-19 21:31:55 +08:00
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.name = "skcipher",
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.owner = THIS_MODULE
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};
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static int __init algif_skcipher_init(void)
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{
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return af_alg_register_type(&algif_type_skcipher);
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}
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static void __exit algif_skcipher_exit(void)
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{
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int err = af_alg_unregister_type(&algif_type_skcipher);
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BUG_ON(err);
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}
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module_init(algif_skcipher_init);
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module_exit(algif_skcipher_exit);
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MODULE_LICENSE("GPL");
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