mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 13:26:40 +07:00
0f1d6dfe03
Pull crypto updates from Herbert Xu: "Here is the crypto update for 4.10: API: - add skcipher walk interface - add asynchronous compression (acomp) interface - fix algif_aed AIO handling of zero buffer Algorithms: - fix unaligned access in poly1305 - fix DRBG output to large buffers Drivers: - add support for iMX6UL to caam - fix givenc descriptors (used by IPsec) in caam - accelerated SHA256/SHA512 for ARM64 from OpenSSL - add SSE CRCT10DIF and CRC32 to ARM/ARM64 - add AEAD support to Chelsio chcr - add Armada 8K support to omap-rng" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (148 commits) crypto: testmgr - fix overlap in chunked tests again crypto: arm/crc32 - accelerated support based on x86 SSE implementation crypto: arm64/crc32 - accelerated support based on x86 SSE implementation crypto: arm/crct10dif - port x86 SSE implementation to ARM crypto: arm64/crct10dif - port x86 SSE implementation to arm64 crypto: testmgr - add/enhance test cases for CRC-T10DIF crypto: testmgr - avoid overlap in chunked tests crypto: chcr - checking for IS_ERR() instead of NULL crypto: caam - check caam_emi_slow instead of re-lookup platform crypto: algif_aead - fix AIO handling of zero buffer crypto: aes-ce - Make aes_simd_algs static crypto: algif_skcipher - set error code when kcalloc fails crypto: caam - make aamalg_desc a proper module crypto: caam - pass key buffers with typesafe pointers crypto: arm64/aes-ce-ccm - Fix AEAD decryption length MAINTAINERS: add crypto headers to crypto entry crypt: doc - remove misleading mention of async API crypto: doc - fix header file name crypto: api - fix comment typo crypto: skcipher - Add separate walker for AEAD decryption ..
1000 lines
21 KiB
C
1000 lines
21 KiB
C
/*
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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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*/
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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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#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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struct skcipher_sg_list {
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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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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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struct skcipher_ctx {
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struct list_head tsgl;
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struct af_alg_sgl rsgl;
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void *iv;
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struct af_alg_completion completion;
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atomic_t inflight;
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size_t used;
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unsigned int len;
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bool more;
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bool merge;
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bool enc;
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struct skcipher_request req;
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};
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struct skcipher_async_rsgl {
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struct af_alg_sgl sgl;
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struct list_head list;
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};
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struct skcipher_async_req {
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struct kiocb *iocb;
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struct skcipher_async_rsgl first_sgl;
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struct list_head list;
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struct scatterlist *tsg;
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atomic_t *inflight;
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struct skcipher_request req;
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};
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#define MAX_SGL_ENTS ((4096 - sizeof(struct skcipher_sg_list)) / \
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sizeof(struct scatterlist) - 1)
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static void skcipher_free_async_sgls(struct skcipher_async_req *sreq)
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{
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struct skcipher_async_rsgl *rsgl, *tmp;
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struct scatterlist *sgl;
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struct scatterlist *sg;
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int i, n;
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list_for_each_entry_safe(rsgl, tmp, &sreq->list, list) {
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af_alg_free_sg(&rsgl->sgl);
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if (rsgl != &sreq->first_sgl)
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kfree(rsgl);
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}
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sgl = sreq->tsg;
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n = sg_nents(sgl);
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for_each_sg(sgl, sg, n, i)
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put_page(sg_page(sg));
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kfree(sreq->tsg);
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}
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static void skcipher_async_cb(struct crypto_async_request *req, int err)
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{
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struct skcipher_async_req *sreq = req->data;
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struct kiocb *iocb = sreq->iocb;
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atomic_dec(sreq->inflight);
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skcipher_free_async_sgls(sreq);
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kzfree(sreq);
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iocb->ki_complete(iocb, err, err);
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}
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static inline int skcipher_sndbuf(struct sock *sk)
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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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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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}
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static inline bool skcipher_writable(struct sock *sk)
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{
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return PAGE_SIZE <= skcipher_sndbuf(sk);
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}
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static int skcipher_alloc_sgl(struct sock *sk)
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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_sg_list *sgl;
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struct scatterlist *sg = NULL;
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sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
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if (!list_empty(&ctx->tsgl))
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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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sg_chain(sg, MAX_SGL_ENTS + 1, sgl->sg);
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list_add_tail(&sgl->list, &ctx->tsgl);
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}
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return 0;
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}
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static void skcipher_pull_sgl(struct sock *sk, size_t used, int put)
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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_sg_list *sgl;
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struct scatterlist *sg;
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int i;
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while (!list_empty(&ctx->tsgl)) {
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sgl = list_first_entry(&ctx->tsgl, struct skcipher_sg_list,
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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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size_t plen = min_t(size_t, used, sg[i].length);
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if (!sg_page(sg + i))
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continue;
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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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if (put)
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put_page(sg_page(sg + i));
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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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sock_kfree_s(sk, sgl,
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sizeof(*sgl) + sizeof(sgl->sg[0]) *
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(MAX_SGL_ENTS + 1));
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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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static void skcipher_free_sgl(struct sock *sk)
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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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skcipher_pull_sgl(sk, ctx->used, 1);
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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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DEFINE_WAIT_FUNC(wait, woken_wake_function);
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int err = -ERESTARTSYS;
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long timeout;
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if (flags & MSG_DONTWAIT)
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return -EAGAIN;
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sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
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add_wait_queue(sk_sleep(sk), &wait);
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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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if (sk_wait_event(sk, &timeout, skcipher_writable(sk), &wait)) {
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err = 0;
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break;
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}
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}
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remove_wait_queue(sk_sleep(sk), &wait);
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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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if (skwq_has_sleeper(wq))
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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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DEFINE_WAIT_FUNC(wait, woken_wake_function);
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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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sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
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add_wait_queue(sk_sleep(sk), &wait);
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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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if (sk_wait_event(sk, &timeout, ctx->used, &wait)) {
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err = 0;
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break;
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}
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}
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remove_wait_queue(sk_sleep(sk), &wait);
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sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
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return err;
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}
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static void skcipher_data_wakeup(struct sock *sk)
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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 socket_wq *wq;
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if (!ctx->used)
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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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if (skwq_has_sleeper(wq))
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wake_up_interruptible_sync_poll(&wq->wait, POLLOUT |
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POLLRDNORM |
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POLLRDBAND);
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sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
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rcu_read_unlock();
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}
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static int skcipher_sendmsg(struct socket *sock, struct msghdr *msg,
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size_t size)
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{
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struct sock *sk = sock->sk;
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struct alg_sock *ask = alg_sk(sk);
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struct sock *psk = ask->parent;
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struct alg_sock *pask = alg_sk(psk);
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struct skcipher_ctx *ctx = ask->private;
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struct skcipher_tfm *skc = pask->private;
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struct crypto_skcipher *tfm = skc->skcipher;
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unsigned ivsize = crypto_skcipher_ivsize(tfm);
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struct skcipher_sg_list *sgl;
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struct af_alg_control con = {};
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long copied = 0;
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bool enc = 0;
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bool init = 0;
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int err;
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int i;
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if (msg->msg_controllen) {
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err = af_alg_cmsg_send(msg, &con);
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if (err)
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return err;
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init = 1;
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switch (con.op) {
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case ALG_OP_ENCRYPT:
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enc = 1;
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break;
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case ALG_OP_DECRYPT:
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enc = 0;
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break;
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default:
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return -EINVAL;
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}
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if (con.iv && con.iv->ivlen != ivsize)
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return -EINVAL;
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}
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err = -EINVAL;
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lock_sock(sk);
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if (!ctx->more && ctx->used)
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goto unlock;
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if (init) {
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ctx->enc = enc;
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if (con.iv)
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memcpy(ctx->iv, con.iv->iv, ivsize);
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}
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while (size) {
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struct scatterlist *sg;
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unsigned long len = size;
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size_t plen;
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if (ctx->merge) {
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sgl = list_entry(ctx->tsgl.prev,
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struct skcipher_sg_list, list);
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sg = sgl->sg + sgl->cur - 1;
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len = min_t(unsigned long, len,
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PAGE_SIZE - sg->offset - sg->length);
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err = memcpy_from_msg(page_address(sg_page(sg)) +
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sg->offset + sg->length,
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msg, len);
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if (err)
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goto unlock;
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sg->length += len;
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ctx->merge = (sg->offset + sg->length) &
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(PAGE_SIZE - 1);
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ctx->used += len;
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copied += len;
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size -= len;
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continue;
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}
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if (!skcipher_writable(sk)) {
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err = skcipher_wait_for_wmem(sk, msg->msg_flags);
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if (err)
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goto unlock;
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}
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len = min_t(unsigned long, len, skcipher_sndbuf(sk));
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err = skcipher_alloc_sgl(sk);
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if (err)
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goto unlock;
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sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
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sg = sgl->sg;
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if (sgl->cur)
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sg_unmark_end(sg + sgl->cur - 1);
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do {
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i = sgl->cur;
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plen = min_t(size_t, len, PAGE_SIZE);
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sg_assign_page(sg + i, alloc_page(GFP_KERNEL));
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err = -ENOMEM;
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if (!sg_page(sg + i))
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goto unlock;
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err = memcpy_from_msg(page_address(sg_page(sg + i)),
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msg, plen);
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if (err) {
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__free_page(sg_page(sg + i));
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sg_assign_page(sg + i, NULL);
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goto unlock;
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}
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sg[i].length = plen;
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len -= plen;
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ctx->used += plen;
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copied += plen;
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size -= plen;
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sgl->cur++;
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} while (len && sgl->cur < MAX_SGL_ENTS);
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if (!size)
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sg_mark_end(sg + sgl->cur - 1);
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ctx->merge = plen & (PAGE_SIZE - 1);
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}
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err = 0;
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ctx->more = msg->msg_flags & MSG_MORE;
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unlock:
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skcipher_data_wakeup(sk);
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release_sock(sk);
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return copied ?: err;
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}
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static ssize_t skcipher_sendpage(struct socket *sock, struct page *page,
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int offset, size_t size, int flags)
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{
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struct sock *sk = sock->sk;
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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_sg_list *sgl;
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int err = -EINVAL;
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if (flags & MSG_SENDPAGE_NOTLAST)
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flags |= MSG_MORE;
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lock_sock(sk);
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if (!ctx->more && ctx->used)
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goto unlock;
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if (!size)
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goto done;
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if (!skcipher_writable(sk)) {
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err = skcipher_wait_for_wmem(sk, flags);
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if (err)
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goto unlock;
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}
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err = skcipher_alloc_sgl(sk);
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if (err)
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goto unlock;
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ctx->merge = 0;
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sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
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if (sgl->cur)
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sg_unmark_end(sgl->sg + sgl->cur - 1);
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sg_mark_end(sgl->sg + sgl->cur);
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get_page(page);
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sg_set_page(sgl->sg + sgl->cur, page, size, offset);
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sgl->cur++;
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ctx->used += size;
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done:
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ctx->more = flags & MSG_MORE;
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unlock:
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skcipher_data_wakeup(sk);
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release_sock(sk);
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return err ?: size;
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}
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static int skcipher_all_sg_nents(struct skcipher_ctx *ctx)
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{
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struct skcipher_sg_list *sgl;
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struct scatterlist *sg;
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int nents = 0;
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list_for_each_entry(sgl, &ctx->tsgl, list) {
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sg = sgl->sg;
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while (!sg->length)
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sg++;
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nents += sg_nents(sg);
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}
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return nents;
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}
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static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
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int flags)
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{
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struct sock *sk = sock->sk;
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struct alg_sock *ask = alg_sk(sk);
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struct sock *psk = ask->parent;
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struct alg_sock *pask = alg_sk(psk);
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struct skcipher_ctx *ctx = ask->private;
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struct skcipher_tfm *skc = pask->private;
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struct crypto_skcipher *tfm = skc->skcipher;
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struct skcipher_sg_list *sgl;
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struct scatterlist *sg;
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struct skcipher_async_req *sreq;
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struct skcipher_request *req;
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struct skcipher_async_rsgl *last_rsgl = NULL;
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unsigned int txbufs = 0, len = 0, tx_nents;
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unsigned int reqsize = crypto_skcipher_reqsize(tfm);
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unsigned int ivsize = crypto_skcipher_ivsize(tfm);
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int err = -ENOMEM;
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bool mark = false;
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char *iv;
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|
|
sreq = kzalloc(sizeof(*sreq) + reqsize + ivsize, GFP_KERNEL);
|
|
if (unlikely(!sreq))
|
|
goto out;
|
|
|
|
req = &sreq->req;
|
|
iv = (char *)(req + 1) + reqsize;
|
|
sreq->iocb = msg->msg_iocb;
|
|
INIT_LIST_HEAD(&sreq->list);
|
|
sreq->inflight = &ctx->inflight;
|
|
|
|
lock_sock(sk);
|
|
tx_nents = skcipher_all_sg_nents(ctx);
|
|
sreq->tsg = kcalloc(tx_nents, sizeof(*sg), GFP_KERNEL);
|
|
if (unlikely(!sreq->tsg))
|
|
goto unlock;
|
|
sg_init_table(sreq->tsg, tx_nents);
|
|
memcpy(iv, ctx->iv, ivsize);
|
|
skcipher_request_set_tfm(req, tfm);
|
|
skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP,
|
|
skcipher_async_cb, sreq);
|
|
|
|
while (iov_iter_count(&msg->msg_iter)) {
|
|
struct skcipher_async_rsgl *rsgl;
|
|
int used;
|
|
|
|
if (!ctx->used) {
|
|
err = skcipher_wait_for_data(sk, flags);
|
|
if (err)
|
|
goto free;
|
|
}
|
|
sgl = list_first_entry(&ctx->tsgl,
|
|
struct skcipher_sg_list, list);
|
|
sg = sgl->sg;
|
|
|
|
while (!sg->length)
|
|
sg++;
|
|
|
|
used = min_t(unsigned long, ctx->used,
|
|
iov_iter_count(&msg->msg_iter));
|
|
used = min_t(unsigned long, used, sg->length);
|
|
|
|
if (txbufs == tx_nents) {
|
|
struct scatterlist *tmp;
|
|
int x;
|
|
/* Ran out of tx slots in async request
|
|
* need to expand */
|
|
tmp = kcalloc(tx_nents * 2, sizeof(*tmp),
|
|
GFP_KERNEL);
|
|
if (!tmp) {
|
|
err = -ENOMEM;
|
|
goto free;
|
|
}
|
|
|
|
sg_init_table(tmp, tx_nents * 2);
|
|
for (x = 0; x < tx_nents; x++)
|
|
sg_set_page(&tmp[x], sg_page(&sreq->tsg[x]),
|
|
sreq->tsg[x].length,
|
|
sreq->tsg[x].offset);
|
|
kfree(sreq->tsg);
|
|
sreq->tsg = tmp;
|
|
tx_nents *= 2;
|
|
mark = true;
|
|
}
|
|
/* Need to take over the tx sgl from ctx
|
|
* to the asynch req - these sgls will be freed later */
|
|
sg_set_page(sreq->tsg + txbufs++, sg_page(sg), sg->length,
|
|
sg->offset);
|
|
|
|
if (list_empty(&sreq->list)) {
|
|
rsgl = &sreq->first_sgl;
|
|
list_add_tail(&rsgl->list, &sreq->list);
|
|
} else {
|
|
rsgl = kmalloc(sizeof(*rsgl), GFP_KERNEL);
|
|
if (!rsgl) {
|
|
err = -ENOMEM;
|
|
goto free;
|
|
}
|
|
list_add_tail(&rsgl->list, &sreq->list);
|
|
}
|
|
|
|
used = af_alg_make_sg(&rsgl->sgl, &msg->msg_iter, used);
|
|
err = used;
|
|
if (used < 0)
|
|
goto free;
|
|
if (last_rsgl)
|
|
af_alg_link_sg(&last_rsgl->sgl, &rsgl->sgl);
|
|
|
|
last_rsgl = rsgl;
|
|
len += used;
|
|
skcipher_pull_sgl(sk, used, 0);
|
|
iov_iter_advance(&msg->msg_iter, used);
|
|
}
|
|
|
|
if (mark)
|
|
sg_mark_end(sreq->tsg + txbufs - 1);
|
|
|
|
skcipher_request_set_crypt(req, sreq->tsg, sreq->first_sgl.sgl.sg,
|
|
len, iv);
|
|
err = ctx->enc ? crypto_skcipher_encrypt(req) :
|
|
crypto_skcipher_decrypt(req);
|
|
if (err == -EINPROGRESS) {
|
|
atomic_inc(&ctx->inflight);
|
|
err = -EIOCBQUEUED;
|
|
sreq = NULL;
|
|
goto unlock;
|
|
}
|
|
free:
|
|
skcipher_free_async_sgls(sreq);
|
|
unlock:
|
|
skcipher_wmem_wakeup(sk);
|
|
release_sock(sk);
|
|
kzfree(sreq);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int skcipher_recvmsg_sync(struct socket *sock, struct msghdr *msg,
|
|
int flags)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
struct sock *psk = ask->parent;
|
|
struct alg_sock *pask = alg_sk(psk);
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
struct skcipher_tfm *skc = pask->private;
|
|
struct crypto_skcipher *tfm = skc->skcipher;
|
|
unsigned bs = crypto_skcipher_blocksize(tfm);
|
|
struct skcipher_sg_list *sgl;
|
|
struct scatterlist *sg;
|
|
int err = -EAGAIN;
|
|
int used;
|
|
long copied = 0;
|
|
|
|
lock_sock(sk);
|
|
while (msg_data_left(msg)) {
|
|
if (!ctx->used) {
|
|
err = skcipher_wait_for_data(sk, flags);
|
|
if (err)
|
|
goto unlock;
|
|
}
|
|
|
|
used = min_t(unsigned long, ctx->used, msg_data_left(msg));
|
|
|
|
used = af_alg_make_sg(&ctx->rsgl, &msg->msg_iter, used);
|
|
err = used;
|
|
if (err < 0)
|
|
goto unlock;
|
|
|
|
if (ctx->more || used < ctx->used)
|
|
used -= used % bs;
|
|
|
|
err = -EINVAL;
|
|
if (!used)
|
|
goto free;
|
|
|
|
sgl = list_first_entry(&ctx->tsgl,
|
|
struct skcipher_sg_list, list);
|
|
sg = sgl->sg;
|
|
|
|
while (!sg->length)
|
|
sg++;
|
|
|
|
skcipher_request_set_crypt(&ctx->req, sg, ctx->rsgl.sg, used,
|
|
ctx->iv);
|
|
|
|
err = af_alg_wait_for_completion(
|
|
ctx->enc ?
|
|
crypto_skcipher_encrypt(&ctx->req) :
|
|
crypto_skcipher_decrypt(&ctx->req),
|
|
&ctx->completion);
|
|
|
|
free:
|
|
af_alg_free_sg(&ctx->rsgl);
|
|
|
|
if (err)
|
|
goto unlock;
|
|
|
|
copied += used;
|
|
skcipher_pull_sgl(sk, used, 1);
|
|
iov_iter_advance(&msg->msg_iter, used);
|
|
}
|
|
|
|
err = 0;
|
|
|
|
unlock:
|
|
skcipher_wmem_wakeup(sk);
|
|
release_sock(sk);
|
|
|
|
return copied ?: err;
|
|
}
|
|
|
|
static int skcipher_recvmsg(struct socket *sock, struct msghdr *msg,
|
|
size_t ignored, int flags)
|
|
{
|
|
return (msg->msg_iocb && !is_sync_kiocb(msg->msg_iocb)) ?
|
|
skcipher_recvmsg_async(sock, msg, flags) :
|
|
skcipher_recvmsg_sync(sock, msg, flags);
|
|
}
|
|
|
|
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,
|
|
};
|
|
|
|
static int skcipher_check_key(struct socket *sock)
|
|
{
|
|
int err = 0;
|
|
struct sock *psk;
|
|
struct alg_sock *pask;
|
|
struct skcipher_tfm *tfm;
|
|
struct sock *sk = sock->sk;
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
|
|
lock_sock(sk);
|
|
if (ask->refcnt)
|
|
goto unlock_child;
|
|
|
|
psk = ask->parent;
|
|
pask = alg_sk(ask->parent);
|
|
tfm = pask->private;
|
|
|
|
err = -ENOKEY;
|
|
lock_sock_nested(psk, SINGLE_DEPTH_NESTING);
|
|
if (!tfm->has_key)
|
|
goto unlock;
|
|
|
|
if (!pask->refcnt++)
|
|
sock_hold(psk);
|
|
|
|
ask->refcnt = 1;
|
|
sock_put(psk);
|
|
|
|
err = 0;
|
|
|
|
unlock:
|
|
release_sock(psk);
|
|
unlock_child:
|
|
release_sock(sk);
|
|
|
|
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,
|
|
};
|
|
|
|
static void *skcipher_bind(const char *name, u32 type, u32 mask)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static void skcipher_release(void *private)
|
|
{
|
|
struct skcipher_tfm *tfm = private;
|
|
|
|
crypto_free_skcipher(tfm->skcipher);
|
|
kfree(tfm);
|
|
}
|
|
|
|
static int skcipher_setkey(void *private, const u8 *key, unsigned int keylen)
|
|
{
|
|
struct skcipher_tfm *tfm = private;
|
|
int err;
|
|
|
|
err = crypto_skcipher_setkey(tfm->skcipher, key, keylen);
|
|
tfm->has_key = !err;
|
|
|
|
return err;
|
|
}
|
|
|
|
static void skcipher_wait(struct sock *sk)
|
|
{
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
int ctr = 0;
|
|
|
|
while (atomic_read(&ctx->inflight) && ctr++ < 100)
|
|
msleep(100);
|
|
}
|
|
|
|
static void skcipher_sock_destruct(struct sock *sk)
|
|
{
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(&ctx->req);
|
|
|
|
if (atomic_read(&ctx->inflight))
|
|
skcipher_wait(sk);
|
|
|
|
skcipher_free_sgl(sk);
|
|
sock_kzfree_s(sk, ctx->iv, crypto_skcipher_ivsize(tfm));
|
|
sock_kfree_s(sk, ctx, ctx->len);
|
|
af_alg_release_parent(sk);
|
|
}
|
|
|
|
static int skcipher_accept_parent_nokey(void *private, struct sock *sk)
|
|
{
|
|
struct skcipher_ctx *ctx;
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
struct skcipher_tfm *tfm = private;
|
|
struct crypto_skcipher *skcipher = tfm->skcipher;
|
|
unsigned int len = sizeof(*ctx) + crypto_skcipher_reqsize(skcipher);
|
|
|
|
ctx = sock_kmalloc(sk, len, GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
ctx->iv = sock_kmalloc(sk, crypto_skcipher_ivsize(skcipher),
|
|
GFP_KERNEL);
|
|
if (!ctx->iv) {
|
|
sock_kfree_s(sk, ctx, len);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset(ctx->iv, 0, crypto_skcipher_ivsize(skcipher));
|
|
|
|
INIT_LIST_HEAD(&ctx->tsgl);
|
|
ctx->len = len;
|
|
ctx->used = 0;
|
|
ctx->more = 0;
|
|
ctx->merge = 0;
|
|
ctx->enc = 0;
|
|
atomic_set(&ctx->inflight, 0);
|
|
af_alg_init_completion(&ctx->completion);
|
|
|
|
ask->private = ctx;
|
|
|
|
skcipher_request_set_tfm(&ctx->req, skcipher);
|
|
skcipher_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_SLEEP |
|
|
CRYPTO_TFM_REQ_MAY_BACKLOG,
|
|
af_alg_complete, &ctx->completion);
|
|
|
|
sk->sk_destruct = skcipher_sock_destruct;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int skcipher_accept_parent(void *private, struct sock *sk)
|
|
{
|
|
struct skcipher_tfm *tfm = private;
|
|
|
|
if (!tfm->has_key && crypto_skcipher_has_setkey(tfm->skcipher))
|
|
return -ENOKEY;
|
|
|
|
return skcipher_accept_parent_nokey(private, sk);
|
|
}
|
|
|
|
static const struct af_alg_type algif_type_skcipher = {
|
|
.bind = skcipher_bind,
|
|
.release = skcipher_release,
|
|
.setkey = skcipher_setkey,
|
|
.accept = skcipher_accept_parent,
|
|
.accept_nokey = skcipher_accept_parent_nokey,
|
|
.ops = &algif_skcipher_ops,
|
|
.ops_nokey = &algif_skcipher_ops_nokey,
|
|
.name = "skcipher",
|
|
.owner = THIS_MODULE
|
|
};
|
|
|
|
static int __init algif_skcipher_init(void)
|
|
{
|
|
return af_alg_register_type(&algif_type_skcipher);
|
|
}
|
|
|
|
static void __exit algif_skcipher_exit(void)
|
|
{
|
|
int err = af_alg_unregister_type(&algif_type_skcipher);
|
|
BUG_ON(err);
|
|
}
|
|
|
|
module_init(algif_skcipher_init);
|
|
module_exit(algif_skcipher_exit);
|
|
MODULE_LICENSE("GPL");
|