c7d347c7f0
public header files put into include/crpyto private header/source files put into crpyto crypto.c cryptodev.[c|h] cryptosoft.[c|h] come from: commit id is f245bed2a7593bf0decce50caaed4ce05fefd6cf the rest come from: commit id is 61b0e532b2dce0a91cf3ea67d346645a61a88cdd Signed-off-by: anjiahao <anjiahao@xiaomi.com>
761 lines
17 KiB
C
761 lines
17 KiB
C
/* $OpenBSD: cryptodev.c,v 1.82 2014/08/18 05:11:03 dlg Exp $ */
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/*
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* Copyright (c) 2001 Theo de Raadt
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Effort sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F30602-01-2-0537.
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/pool.h>
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#include <sys/mbuf.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/errno.h>
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#include <dev/rndvar.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <crypto/md5.h>
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#include <crypto/sha1.h>
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#include <crypto/rmd160.h>
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#include <crypto/cast.h>
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#include <crypto/blf.h>
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#include <crypto/cryptodev.h>
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#include <crypto/xform.h>
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extern struct cryptocap *crypto_drivers;
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extern int crypto_drivers_num;
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struct csession {
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TAILQ_ENTRY(csession) next;
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u_int64_t sid;
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u_int32_t ses;
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u_int32_t cipher;
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struct enc_xform *txform;
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u_int32_t mac;
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struct auth_hash *thash;
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caddr_t key;
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int keylen;
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u_char tmp_iv[EALG_MAX_BLOCK_LEN];
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caddr_t mackey;
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int mackeylen;
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u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
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struct iovec iovec[IOV_MAX];
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struct uio uio;
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int error;
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};
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struct fcrypt {
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TAILQ_HEAD(csessionlist, csession) csessions;
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int sesn;
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};
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void cryptoattach(int);
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int cryptof_read(struct file *, off_t *, struct uio *, struct ucred *);
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int cryptof_write(struct file *, off_t *, struct uio *, struct ucred *);
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int cryptof_ioctl(struct file *, u_long, caddr_t, struct proc *p);
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int cryptof_poll(struct file *, int, struct proc *);
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int cryptof_kqfilter(struct file *, struct knote *);
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int cryptof_stat(struct file *, struct stat *, struct proc *);
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int cryptof_close(struct file *, struct proc *);
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static struct fileops cryptofops = {
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cryptof_read,
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cryptof_write,
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cryptof_ioctl,
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cryptof_poll,
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cryptof_kqfilter,
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cryptof_stat,
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cryptof_close
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};
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struct csession *csefind(struct fcrypt *, u_int);
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int csedelete(struct fcrypt *, struct csession *);
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struct csession *cseadd(struct fcrypt *, struct csession *);
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struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, u_int64_t,
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caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
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struct auth_hash *);
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int csefree(struct csession *);
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int cryptodev_op(struct csession *, struct crypt_op *, struct proc *);
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int cryptodev_key(struct crypt_kop *);
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int cryptodev_dokey(struct crypt_kop *kop, struct crparam kvp[]);
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int cryptodev_cb(struct cryptop *);
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int cryptodevkey_cb(struct cryptkop *);
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int usercrypto = 0; /* userland may do crypto requests */
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int userasymcrypto = 0; /* userland may do asymmetric crypto reqs */
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int cryptodevallowsoft = 0; /* only use hardware crypto */
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/* ARGSUSED */
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int
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cryptof_read(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred)
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{
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return (EIO);
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}
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/* ARGSUSED */
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int
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cryptof_write(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred)
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{
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return (EIO);
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}
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/* ARGSUSED */
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int
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cryptof_ioctl(struct file *fp, u_long cmd, caddr_t data, struct proc *p)
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{
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struct cryptoini cria, crie;
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struct fcrypt *fcr = fp->f_data;
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struct csession *cse;
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struct session_op *sop;
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struct crypt_op *cop;
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struct enc_xform *txform = NULL;
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struct auth_hash *thash = NULL;
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u_int64_t sid;
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u_int32_t ses;
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int error = 0;
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switch (cmd) {
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case CIOCGSESSION:
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sop = (struct session_op *)data;
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switch (sop->cipher) {
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case 0:
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break;
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case CRYPTO_DES_CBC:
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txform = &enc_xform_des;
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break;
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case CRYPTO_3DES_CBC:
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txform = &enc_xform_3des;
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break;
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case CRYPTO_BLF_CBC:
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txform = &enc_xform_blf;
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break;
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case CRYPTO_CAST_CBC:
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txform = &enc_xform_cast5;
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break;
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case CRYPTO_AES_CBC:
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txform = &enc_xform_rijndael128;
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break;
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case CRYPTO_AES_CTR:
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txform = &enc_xform_aes_ctr;
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break;
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case CRYPTO_AES_XTS:
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txform = &enc_xform_aes_xts;
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break;
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case CRYPTO_ARC4:
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txform = &enc_xform_arc4;
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break;
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case CRYPTO_NULL:
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txform = &enc_xform_null;
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break;
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default:
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return (EINVAL);
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}
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switch (sop->mac) {
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case 0:
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break;
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#if 0
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case CRYPTO_MD5_HMAC:
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thash = &auth_hash_hmac_md5_96;
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break;
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case CRYPTO_SHA1_HMAC:
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thash = &auth_hash_hmac_sha1_96;
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break;
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case CRYPTO_RIPEMD160_HMAC:
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thash = &auth_hash_hmac_ripemd_160_96;
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break;
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case CRYPTO_MD5:
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thash = &auth_hash_md5;
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break;
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case CRYPTO_SHA1:
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thash = &auth_hash_sha1;
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break;
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#endif
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default:
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return (EINVAL);
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}
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bzero(&crie, sizeof(crie));
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bzero(&cria, sizeof(cria));
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if (txform) {
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crie.cri_alg = txform->type;
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crie.cri_klen = sop->keylen * 8;
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if (sop->keylen > txform->maxkey ||
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sop->keylen < txform->minkey) {
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error = EINVAL;
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goto bail;
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}
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crie.cri_key = malloc(crie.cri_klen / 8, M_XDATA,
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M_WAITOK);
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if ((error = copyin(sop->key, crie.cri_key,
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crie.cri_klen / 8)))
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goto bail;
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if (thash)
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crie.cri_next = &cria;
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}
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if (thash) {
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cria.cri_alg = thash->type;
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cria.cri_klen = sop->mackeylen * 8;
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if (sop->mackeylen != thash->keysize) {
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error = EINVAL;
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goto bail;
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}
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if (cria.cri_klen) {
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cria.cri_key = malloc(cria.cri_klen / 8,
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M_XDATA, M_WAITOK);
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if ((error = copyin(sop->mackey, cria.cri_key,
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cria.cri_klen / 8)))
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goto bail;
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}
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}
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error = crypto_newsession(&sid, (txform ? &crie : &cria),
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!cryptodevallowsoft);
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if (error)
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goto bail;
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cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
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cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
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thash);
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if (cse == NULL) {
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crypto_freesession(sid);
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error = EINVAL;
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goto bail;
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}
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sop->ses = cse->ses;
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bail:
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if (error) {
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if (crie.cri_key) {
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explicit_bzero(crie.cri_key, crie.cri_klen / 8);
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free(crie.cri_key, M_XDATA, 0);
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}
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if (cria.cri_key) {
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explicit_bzero(cria.cri_key, cria.cri_klen / 8);
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free(cria.cri_key, M_XDATA, 0);
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}
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}
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break;
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case CIOCFSESSION:
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ses = *(u_int32_t *)data;
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cse = csefind(fcr, ses);
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if (cse == NULL)
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return (EINVAL);
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csedelete(fcr, cse);
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error = csefree(cse);
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break;
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case CIOCCRYPT:
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cop = (struct crypt_op *)data;
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cse = csefind(fcr, cop->ses);
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if (cse == NULL)
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return (EINVAL);
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error = cryptodev_op(cse, cop, p);
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break;
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case CIOCKEY:
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error = cryptodev_key((struct crypt_kop *)data);
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break;
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case CIOCASYMFEAT:
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error = crypto_getfeat((int *)data);
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break;
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default:
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error = EINVAL;
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}
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return (error);
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}
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int
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cryptodev_op(struct csession *cse, struct crypt_op *cop, struct proc *p)
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{
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struct cryptop *crp = NULL;
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struct cryptodesc *crde = NULL, *crda = NULL;
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int s, error;
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u_int32_t hid;
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if (cop->len > 64*1024-4)
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return (E2BIG);
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if (cse->txform) {
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if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0)
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return (EINVAL);
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}
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bzero(&cse->uio, sizeof(cse->uio));
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cse->uio.uio_iovcnt = 1;
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cse->uio.uio_segflg = UIO_SYSSPACE;
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cse->uio.uio_rw = UIO_WRITE;
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cse->uio.uio_procp = p;
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cse->uio.uio_iov = cse->iovec;
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bzero(&cse->iovec, sizeof(cse->iovec));
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cse->uio.uio_iov[0].iov_len = cop->len;
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cse->uio.uio_iov[0].iov_base = dma_alloc(cop->len, M_WAITOK);
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cse->uio.uio_resid = cse->uio.uio_iov[0].iov_len;
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/* number of requests, not logical and */
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crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
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if (crp == NULL) {
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error = ENOMEM;
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goto bail;
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}
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if (cse->thash) {
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crda = crp->crp_desc;
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if (cse->txform)
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crde = crda->crd_next;
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} else {
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if (cse->txform)
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crde = crp->crp_desc;
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else {
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error = EINVAL;
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goto bail;
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}
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}
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if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
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goto bail;
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if (crda) {
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crda->crd_skip = 0;
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crda->crd_len = cop->len;
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crda->crd_inject = 0; /* ??? */
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crda->crd_alg = cse->mac;
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crda->crd_key = cse->mackey;
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crda->crd_klen = cse->mackeylen * 8;
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}
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if (crde) {
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if (cop->op == COP_ENCRYPT)
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crde->crd_flags |= CRD_F_ENCRYPT;
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else
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crde->crd_flags &= ~CRD_F_ENCRYPT;
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crde->crd_len = cop->len;
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crde->crd_inject = 0;
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crde->crd_alg = cse->cipher;
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crde->crd_key = cse->key;
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crde->crd_klen = cse->keylen * 8;
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}
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crp->crp_ilen = cop->len;
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crp->crp_buf = (caddr_t)&cse->uio;
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crp->crp_callback = cryptodev_cb;
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crp->crp_sid = cse->sid;
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crp->crp_opaque = cse;
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if (cop->iv) {
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if (crde == NULL) {
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error = EINVAL;
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goto bail;
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}
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if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
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error = EINVAL;
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goto bail;
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}
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if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
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goto bail;
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bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
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crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
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crde->crd_skip = 0;
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} else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
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crde->crd_skip = 0;
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} else if (crde) {
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crde->crd_flags |= CRD_F_IV_PRESENT;
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crde->crd_skip = cse->txform->blocksize;
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crde->crd_len -= cse->txform->blocksize;
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}
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if (cop->mac) {
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if (crda == NULL) {
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error = EINVAL;
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goto bail;
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}
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crp->crp_mac = cse->tmp_mac;
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}
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/* try the fast path first */
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crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_NOQUEUE;
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hid = (crp->crp_sid >> 32) & 0xffffffff;
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if (hid >= crypto_drivers_num)
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goto dispatch;
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if (crypto_drivers[hid].cc_flags & CRYPTOCAP_F_SOFTWARE)
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goto dispatch;
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if (crypto_drivers[hid].cc_process == NULL)
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goto dispatch;
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error = crypto_drivers[hid].cc_process(crp);
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if (error) {
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/* clear error */
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crp->crp_etype = 0;
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goto dispatch;
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}
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goto processed;
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dispatch:
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crp->crp_flags = CRYPTO_F_IOV;
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crypto_dispatch(crp);
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processed:
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s = splnet();
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while (!(crp->crp_flags & CRYPTO_F_DONE)) {
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error = tsleep(cse, PSOCK, "crydev", 0);
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}
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splx(s);
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if (error) {
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/* XXX can this happen? if so, how do we recover? */
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goto bail;
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}
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if (cse->error) {
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error = cse->error;
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goto bail;
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}
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if (crp->crp_etype != 0) {
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error = crp->crp_etype;
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goto bail;
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}
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if (cop->dst &&
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(error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
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goto bail;
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if (cop->mac &&
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(error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize)))
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goto bail;
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bail:
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if (crp)
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crypto_freereq(crp);
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if (cse->uio.uio_iov[0].iov_base)
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dma_free(cse->uio.uio_iov[0].iov_base, cop->len);
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return (error);
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}
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int
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cryptodev_cb(struct cryptop *crp)
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{
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struct csession *cse = crp->crp_opaque;
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cse->error = crp->crp_etype;
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if (crp->crp_etype == EAGAIN) {
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crp->crp_flags = CRYPTO_F_IOV;
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return crypto_dispatch(crp);
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}
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wakeup(cse);
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return (0);
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}
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int
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cryptodevkey_cb(struct cryptkop *krp)
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{
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wakeup(krp);
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return (0);
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}
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int
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cryptodev_key(struct crypt_kop *kop)
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{
|
|
struct cryptkop *krp = NULL;
|
|
int error = EINVAL;
|
|
int in, out, size, i;
|
|
|
|
if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
|
|
return (EFBIG);
|
|
}
|
|
|
|
in = kop->crk_iparams;
|
|
out = kop->crk_oparams;
|
|
switch (kop->crk_op) {
|
|
case CRK_MOD_EXP:
|
|
if (in == 3 && out == 1)
|
|
break;
|
|
return (EINVAL);
|
|
case CRK_MOD_EXP_CRT:
|
|
if (in == 6 && out == 1)
|
|
break;
|
|
return (EINVAL);
|
|
case CRK_DSA_SIGN:
|
|
if (in == 5 && out == 2)
|
|
break;
|
|
return (EINVAL);
|
|
case CRK_DSA_VERIFY:
|
|
if (in == 7 && out == 0)
|
|
break;
|
|
return (EINVAL);
|
|
case CRK_DH_COMPUTE_KEY:
|
|
if (in == 3 && out == 1)
|
|
break;
|
|
return (EINVAL);
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
krp = malloc(sizeof *krp, M_XDATA, M_WAITOK | M_ZERO);
|
|
krp->krp_op = kop->crk_op;
|
|
krp->krp_status = kop->crk_status;
|
|
krp->krp_iparams = kop->crk_iparams;
|
|
krp->krp_oparams = kop->crk_oparams;
|
|
krp->krp_status = 0;
|
|
krp->krp_callback = cryptodevkey_cb;
|
|
|
|
for (i = 0; i < CRK_MAXPARAM; i++) {
|
|
krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
|
|
if (kop->crk_param[i].crp_nbits > 65536) {
|
|
/* XXX how big do we need to support? */
|
|
goto fail;
|
|
}
|
|
}
|
|
for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
|
|
size = (krp->krp_param[i].crp_nbits + 7) / 8;
|
|
if (size == 0)
|
|
continue;
|
|
krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
|
|
if (i >= krp->krp_iparams)
|
|
continue;
|
|
error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
|
|
if (error)
|
|
goto fail;
|
|
}
|
|
|
|
error = crypto_kdispatch(krp);
|
|
if (error)
|
|
goto fail;
|
|
error = tsleep(krp, PSOCK, "crydev", 0);
|
|
if (error) {
|
|
/* XXX can this happen? if so, how do we recover? */
|
|
goto fail;
|
|
}
|
|
|
|
if (krp->krp_status != 0) {
|
|
error = krp->krp_status;
|
|
goto fail;
|
|
}
|
|
|
|
for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
|
|
size = (krp->krp_param[i].crp_nbits + 7) / 8;
|
|
if (size == 0)
|
|
continue;
|
|
error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
|
|
if (error)
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
if (krp) {
|
|
kop->crk_status = krp->krp_status;
|
|
for (i = 0; i < CRK_MAXPARAM; i++) {
|
|
if (krp->krp_param[i].crp_p) {
|
|
explicit_bzero(krp->krp_param[i].crp_p,
|
|
(krp->krp_param[i].crp_nbits + 7) / 8);
|
|
free(krp->krp_param[i].crp_p, M_XDATA, 0);
|
|
}
|
|
}
|
|
free(krp, M_XDATA, 0);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
cryptof_poll(struct file *fp, int events, struct proc *p)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
cryptof_kqfilter(struct file *fp, struct knote *kn)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
cryptof_stat(struct file *fp, struct stat *sb, struct proc *p)
|
|
{
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
cryptof_close(struct file *fp, struct proc *p)
|
|
{
|
|
struct fcrypt *fcr = fp->f_data;
|
|
struct csession *cse;
|
|
|
|
while ((cse = TAILQ_FIRST(&fcr->csessions))) {
|
|
TAILQ_REMOVE(&fcr->csessions, cse, next);
|
|
(void)csefree(cse);
|
|
}
|
|
free(fcr, M_XDATA, 0);
|
|
fp->f_data = NULL;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
cryptoattach(int n)
|
|
{
|
|
}
|
|
|
|
int
|
|
cryptoopen(dev_t dev, int flag, int mode, struct proc *p)
|
|
{
|
|
if (usercrypto == 0)
|
|
return (ENXIO);
|
|
#ifdef CRYPTO
|
|
return (0);
|
|
#else
|
|
return (ENXIO);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
cryptoclose(dev_t dev, int flag, int mode, struct proc *p)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
cryptoioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
|
|
{
|
|
struct file *f;
|
|
struct fcrypt *fcr;
|
|
int fd, error;
|
|
|
|
switch (cmd) {
|
|
case CRIOGET:
|
|
fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
|
|
TAILQ_INIT(&fcr->csessions);
|
|
fcr->sesn = 0;
|
|
|
|
fdplock(p->p_fd);
|
|
error = falloc(p, &f, &fd);
|
|
fdpunlock(p->p_fd);
|
|
if (error) {
|
|
free(fcr, M_XDATA, 0);
|
|
return (error);
|
|
}
|
|
f->f_flag = FREAD | FWRITE;
|
|
f->f_type = DTYPE_CRYPTO;
|
|
f->f_ops = &cryptofops;
|
|
f->f_data = fcr;
|
|
*(u_int32_t *)data = fd;
|
|
FILE_SET_MATURE(f, p);
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
struct csession *
|
|
csefind(struct fcrypt *fcr, u_int ses)
|
|
{
|
|
struct csession *cse;
|
|
|
|
TAILQ_FOREACH(cse, &fcr->csessions, next)
|
|
if (cse->ses == ses)
|
|
return (cse);
|
|
return (NULL);
|
|
}
|
|
|
|
int
|
|
csedelete(struct fcrypt *fcr, struct csession *cse_del)
|
|
{
|
|
struct csession *cse;
|
|
|
|
TAILQ_FOREACH(cse, &fcr->csessions, next) {
|
|
if (cse == cse_del) {
|
|
TAILQ_REMOVE(&fcr->csessions, cse, next);
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
struct csession *
|
|
cseadd(struct fcrypt *fcr, struct csession *cse)
|
|
{
|
|
TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
|
|
cse->ses = fcr->sesn++;
|
|
return (cse);
|
|
}
|
|
|
|
struct csession *
|
|
csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
|
|
caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
|
|
struct enc_xform *txform, struct auth_hash *thash)
|
|
{
|
|
struct csession *cse;
|
|
|
|
cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT);
|
|
if (cse == NULL)
|
|
return NULL;
|
|
cse->key = key;
|
|
cse->keylen = keylen/8;
|
|
cse->mackey = mackey;
|
|
cse->mackeylen = mackeylen/8;
|
|
cse->sid = sid;
|
|
cse->cipher = cipher;
|
|
cse->mac = mac;
|
|
cse->txform = txform;
|
|
cse->thash = thash;
|
|
cseadd(fcr, cse);
|
|
return (cse);
|
|
}
|
|
|
|
int
|
|
csefree(struct csession *cse)
|
|
{
|
|
int error;
|
|
|
|
error = crypto_freesession(cse->sid);
|
|
if (cse->key)
|
|
free(cse->key, M_XDATA, 0);
|
|
if (cse->mackey)
|
|
free(cse->mackey, M_XDATA, 0);
|
|
free(cse, M_XDATA, 0);
|
|
return (error);
|
|
}
|