CRYPTO(4): Import from FreeBSD

1 files changed, 1375 insertions, 0 deletions

diff --git a/freebsd/sys/opencrypto/cryptodev.c b/freebsd/sys/opencrypto/cryptodev.c
new file mode 100644
index 00000000..06e2e902
--- /dev/null
+++ b/freebsd/sys/opencrypto/cryptodev.c
@@ -0,0 +1,1375 @@
+#include <machine/rtems-bsd-kernel-space.h>
+
+/*	$OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $	*/
+
+/*-
+ * Copyright (c) 2001 Theo de Raadt
+ * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Portions of this software were developed by John-Mark Gurney
+ * under sponsorship of the FreeBSD Foundation and
+ * Rubicon Communications, LLC (Netgate).
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Effort sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F30602-01-2-0537.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <rtems/bsd/local/opt_compat.h>
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/sysctl.h>
+#include <sys/file.h>
+#include <sys/filedesc.h>
+#include <sys/errno.h>
+#include <sys/uio.h>
+#include <sys/random.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/fcntl.h>
+#include <sys/bus.h>
+#include <sys/user.h>
+#include <sys/sdt.h>
+
+#include <opencrypto/cryptodev.h>
+#include <opencrypto/xform.h>
+
+SDT_PROVIDER_DECLARE(opencrypto);
+
+SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
+
+#ifdef COMPAT_FREEBSD32
+#include <sys/mount.h>
+#include <compat/freebsd32/freebsd32.h>
+
+struct session_op32 {
+	u_int32_t	cipher;
+	u_int32_t	mac;
+	u_int32_t	keylen;
+	u_int32_t	key;
+	int		mackeylen;
+	u_int32_t	mackey;
+	u_int32_t	ses;
+};
+
+struct session2_op32 {
+	u_int32_t	cipher;
+	u_int32_t	mac;
+	u_int32_t	keylen;
+	u_int32_t	key;
+	int		mackeylen;
+	u_int32_t	mackey;
+	u_int32_t	ses;
+	int		crid;
+	int		pad[4];
+};
+
+struct crypt_op32 {
+	u_int32_t	ses;
+	u_int16_t	op;
+	u_int16_t	flags;
+	u_int		len;
+	u_int32_t	src, dst;
+	u_int32_t	mac;
+	u_int32_t	iv;
+};
+
+struct crparam32 {
+	u_int32_t	crp_p;
+	u_int		crp_nbits;
+};
+
+struct crypt_kop32 {
+	u_int		crk_op;
+	u_int		crk_status;
+	u_short		crk_iparams;
+	u_short		crk_oparams;
+	u_int		crk_crid;
+	struct crparam32	crk_param[CRK_MAXPARAM];
+};
+
+struct cryptotstat32 {
+	struct timespec32	acc;
+	struct timespec32	min;
+	struct timespec32	max;
+	u_int32_t	count;
+};
+
+struct cryptostats32 {
+	u_int32_t	cs_ops;
+	u_int32_t	cs_errs;
+	u_int32_t	cs_kops;
+	u_int32_t	cs_kerrs;
+	u_int32_t	cs_intrs;
+	u_int32_t	cs_rets;
+	u_int32_t	cs_blocks;
+	u_int32_t	cs_kblocks;
+	struct cryptotstat32 cs_invoke;
+	struct cryptotstat32 cs_done;
+	struct cryptotstat32 cs_cb;
+	struct cryptotstat32 cs_finis;
+};
+
+#define	CIOCGSESSION32	_IOWR('c', 101, struct session_op32)
+#define	CIOCCRYPT32	_IOWR('c', 103, struct crypt_op32)
+#define	CIOCKEY32	_IOWR('c', 104, struct crypt_kop32)
+#define	CIOCGSESSION232	_IOWR('c', 106, struct session2_op32)
+#define	CIOCKEY232	_IOWR('c', 107, struct crypt_kop32)
+
+static void
+session_op_from_32(const struct session_op32 *from, struct session_op *to)
+{
+
+	CP(*from, *to, cipher);
+	CP(*from, *to, mac);
+	CP(*from, *to, keylen);
+	PTRIN_CP(*from, *to, key);
+	CP(*from, *to, mackeylen);
+	PTRIN_CP(*from, *to, mackey);
+	CP(*from, *to, ses);
+}
+
+static void
+session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
+{
+
+	session_op_from_32((const struct session_op32 *)from,
+	    (struct session_op *)to);
+	CP(*from, *to, crid);
+}
+
+static void
+session_op_to_32(const struct session_op *from, struct session_op32 *to)
+{
+
+	CP(*from, *to, cipher);
+	CP(*from, *to, mac);
+	CP(*from, *to, keylen);
+	PTROUT_CP(*from, *to, key);
+	CP(*from, *to, mackeylen);
+	PTROUT_CP(*from, *to, mackey);
+	CP(*from, *to, ses);
+}
+
+static void
+session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
+{
+
+	session_op_to_32((const struct session_op *)from,
+	    (struct session_op32 *)to);
+	CP(*from, *to, crid);
+}
+
+static void
+crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
+{
+
+	CP(*from, *to, ses);
+	CP(*from, *to, op);
+	CP(*from, *to, flags);
+	CP(*from, *to, len);
+	PTRIN_CP(*from, *to, src);
+	PTRIN_CP(*from, *to, dst);
+	PTRIN_CP(*from, *to, mac);
+	PTRIN_CP(*from, *to, iv);
+}
+
+static void
+crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
+{
+
+	CP(*from, *to, ses);
+	CP(*from, *to, op);
+	CP(*from, *to, flags);
+	CP(*from, *to, len);
+	PTROUT_CP(*from, *to, src);
+	PTROUT_CP(*from, *to, dst);
+	PTROUT_CP(*from, *to, mac);
+	PTROUT_CP(*from, *to, iv);
+}
+
+static void
+crparam_from_32(const struct crparam32 *from, struct crparam *to)
+{
+
+	PTRIN_CP(*from, *to, crp_p);
+	CP(*from, *to, crp_nbits);
+}
+
+static void
+crparam_to_32(const struct crparam *from, struct crparam32 *to)
+{
+
+	PTROUT_CP(*from, *to, crp_p);
+	CP(*from, *to, crp_nbits);
+}
+
+static void
+crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
+{
+	int i;
+
+	CP(*from, *to, crk_op);
+	CP(*from, *to, crk_status);
+	CP(*from, *to, crk_iparams);
+	CP(*from, *to, crk_oparams);
+	CP(*from, *to, crk_crid);
+	for (i = 0; i < CRK_MAXPARAM; i++)
+		crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
+}
+
+static void
+crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
+{
+	int i;
+
+	CP(*from, *to, crk_op);
+	CP(*from, *to, crk_status);
+	CP(*from, *to, crk_iparams);
+	CP(*from, *to, crk_oparams);
+	CP(*from, *to, crk_crid);
+	for (i = 0; i < CRK_MAXPARAM; i++)
+		crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
+}
+#endif
+
+struct csession {
+	TAILQ_ENTRY(csession) next;
+	u_int64_t	sid;
+	u_int32_t	ses;
+	struct mtx	lock;		/* for op submission */
+
+	u_int32_t	cipher;
+	struct enc_xform *txform;
+	u_int32_t	mac;
+	struct auth_hash *thash;
+
+	caddr_t		key;
+	int		keylen;
+	u_char		tmp_iv[EALG_MAX_BLOCK_LEN];
+
+	caddr_t		mackey;
+	int		mackeylen;
+
+	struct iovec	iovec;
+	struct uio	uio;
+	int		error;
+};
+
+struct fcrypt {
+	TAILQ_HEAD(csessionlist, csession) csessions;
+	int		sesn;
+};
+
+static	int cryptof_ioctl(struct file *, u_long, void *,
+		    struct ucred *, struct thread *);
+static	int cryptof_stat(struct file *, struct stat *,
+		    struct ucred *, struct thread *);
+static	int cryptof_close(struct file *, struct thread *);
+static	int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
+		    struct filedesc *);
+
+static struct fileops cryptofops = {
+    .fo_read = invfo_rdwr,
+    .fo_write = invfo_rdwr,
+    .fo_truncate = invfo_truncate,
+    .fo_ioctl = cryptof_ioctl,
+    .fo_poll = invfo_poll,
+    .fo_kqfilter = invfo_kqfilter,
+    .fo_stat = cryptof_stat,
+    .fo_close = cryptof_close,
+    .fo_chmod = invfo_chmod,
+    .fo_chown = invfo_chown,
+    .fo_sendfile = invfo_sendfile,
+    .fo_fill_kinfo = cryptof_fill_kinfo,
+};
+
+static struct csession *csefind(struct fcrypt *, u_int);
+static int csedelete(struct fcrypt *, struct csession *);
+static struct csession *cseadd(struct fcrypt *, struct csession *);
+static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
+    u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
+    struct auth_hash *);
+static int csefree(struct csession *);
+
+static	int cryptodev_op(struct csession *, struct crypt_op *,
+			struct ucred *, struct thread *td);
+static	int cryptodev_aead(struct csession *, struct crypt_aead *,
+			struct ucred *, struct thread *);
+static	int cryptodev_key(struct crypt_kop *);
+static	int cryptodev_find(struct crypt_find_op *);
+
+/*
+ * Check a crypto identifier to see if it requested
+ * a software device/driver.  This can be done either
+ * by device name/class or through search constraints.
+ */
+static int
+checkforsoftware(int *cridp)
+{
+	int crid;
+
+	crid = *cridp;
+
+	if (!crypto_devallowsoft) {
+		if (crid & CRYPTOCAP_F_SOFTWARE) {
+			if (crid & CRYPTOCAP_F_HARDWARE) {
+				*cridp = CRYPTOCAP_F_HARDWARE;
+				return 0;
+			}
+			return EINVAL;
+		}
+		if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
+		    (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
+			return EINVAL;
+	}
+	return 0;
+}
+
+/* ARGSUSED */
+static int
+cryptof_ioctl(
+	struct file *fp,
+	u_long cmd,
+	void *data,
+	struct ucred *active_cred,
+	struct thread *td)
+{
+#define	SES2(p)	((struct session2_op *)p)
+	struct cryptoini cria, crie;
+	struct fcrypt *fcr = fp->f_data;
+	struct csession *cse;
+	struct session_op *sop;
+	struct crypt_op *cop;
+	struct crypt_aead *caead;
+	struct enc_xform *txform = NULL;
+	struct auth_hash *thash = NULL;
+	struct crypt_kop *kop;
+	u_int64_t sid;
+	u_int32_t ses;
+	int error = 0, crid;
+#ifdef COMPAT_FREEBSD32
+	struct session2_op sopc;
+	struct crypt_op copc;
+	struct crypt_kop kopc;
+#endif
+
+	switch (cmd) {
+	case CIOCGSESSION:
+	case CIOCGSESSION2:
+#ifdef COMPAT_FREEBSD32
+	case CIOCGSESSION32:
+	case CIOCGSESSION232:
+		if (cmd == CIOCGSESSION32) {
+			session_op_from_32(data, (struct session_op *)&sopc);
+			sop = (struct session_op *)&sopc;
+		} else if (cmd == CIOCGSESSION232) {
+			session2_op_from_32(data, &sopc);
+			sop = (struct session_op *)&sopc;
+		} else
+#endif
+			sop = (struct session_op *)data;
+		switch (sop->cipher) {
+		case 0:
+			break;
+		case CRYPTO_DES_CBC:
+			txform = &enc_xform_des;
+			break;
+		case CRYPTO_3DES_CBC:
+			txform = &enc_xform_3des;
+			break;
+		case CRYPTO_BLF_CBC:
+			txform = &enc_xform_blf;
+			break;
+		case CRYPTO_CAST_CBC:
+			txform = &enc_xform_cast5;
+			break;
+		case CRYPTO_SKIPJACK_CBC:
+			txform = &enc_xform_skipjack;
+			break;
+		case CRYPTO_AES_CBC:
+			txform = &enc_xform_rijndael128;
+			break;
+		case CRYPTO_AES_XTS:
+			txform = &enc_xform_aes_xts;
+			break;
+		case CRYPTO_NULL_CBC:
+			txform = &enc_xform_null;
+			break;
+		case CRYPTO_ARC4:
+			txform = &enc_xform_arc4;
+			break;
+ 		case CRYPTO_CAMELLIA_CBC:
+ 			txform = &enc_xform_camellia;
+ 			break;
+		case CRYPTO_AES_ICM:
+			txform = &enc_xform_aes_icm;
+ 			break;
+		case CRYPTO_AES_NIST_GCM_16:
+			txform = &enc_xform_aes_nist_gcm;
+ 			break;
+
+		default:
+			CRYPTDEB("invalid cipher");
+			return (EINVAL);
+		}
+
+		switch (sop->mac) {
+		case 0:
+			break;
+		case CRYPTO_MD5_HMAC:
+			thash = &auth_hash_hmac_md5;
+			break;
+		case CRYPTO_SHA1_HMAC:
+			thash = &auth_hash_hmac_sha1;
+			break;
+		case CRYPTO_SHA2_256_HMAC:
+			thash = &auth_hash_hmac_sha2_256;
+			break;
+		case CRYPTO_SHA2_384_HMAC:
+			thash = &auth_hash_hmac_sha2_384;
+			break;
+		case CRYPTO_SHA2_512_HMAC:
+			thash = &auth_hash_hmac_sha2_512;
+			break;
+		case CRYPTO_RIPEMD160_HMAC:
+			thash = &auth_hash_hmac_ripemd_160;
+			break;
+		case CRYPTO_AES_128_NIST_GMAC:
+			thash = &auth_hash_nist_gmac_aes_128;
+			break;
+		case CRYPTO_AES_192_NIST_GMAC:
+			thash = &auth_hash_nist_gmac_aes_192;
+			break;
+		case CRYPTO_AES_256_NIST_GMAC:
+			thash = &auth_hash_nist_gmac_aes_256;
+			break;
+
+#ifdef notdef
+		case CRYPTO_MD5:
+			thash = &auth_hash_md5;
+			break;
+		case CRYPTO_SHA1:
+			thash = &auth_hash_sha1;
+			break;
+#endif
+		case CRYPTO_NULL_HMAC:
+			thash = &auth_hash_null;
+			break;
+		default:
+			CRYPTDEB("invalid mac");
+			return (EINVAL);
+		}
+
+		bzero(&crie, sizeof(crie));
+		bzero(&cria, sizeof(cria));
+
+		if (txform) {
+			crie.cri_alg = txform->type;
+			crie.cri_klen = sop->keylen * 8;
+			if (sop->keylen > txform->maxkey ||
+			    sop->keylen < txform->minkey) {
+				CRYPTDEB("invalid cipher parameters");
+				error = EINVAL;
+				goto bail;
+			}
+
+			crie.cri_key = malloc(crie.cri_klen / 8,
+			    M_XDATA, M_WAITOK);
+			if ((error = copyin(sop->key, crie.cri_key,
+			    crie.cri_klen / 8))) {
+				CRYPTDEB("invalid key");
+				goto bail;
+			}
+			if (thash)
+				crie.cri_next = &cria;
+		}
+
+		if (thash) {
+			cria.cri_alg = thash->type;
+			cria.cri_klen = sop->mackeylen * 8;
+			if (sop->mackeylen != thash->keysize) {
+				CRYPTDEB("invalid mac key length");
+				error = EINVAL;
+				goto bail;
+			}
+
+			if (cria.cri_klen) {
+				cria.cri_key = malloc(cria.cri_klen / 8,
+				    M_XDATA, M_WAITOK);
+				if ((error = copyin(sop->mackey, cria.cri_key,
+				    cria.cri_klen / 8))) {
+					CRYPTDEB("invalid mac key");
+					goto bail;
+				}
+			}
+		}
+
+		/* NB: CIOCGSESSION2 has the crid */
+		if (cmd == CIOCGSESSION2
+#ifdef COMPAT_FREEBSD32
+		    || cmd == CIOCGSESSION232
+#endif
+			) {
+			crid = SES2(sop)->crid;
+			error = checkforsoftware(&crid);
+			if (error) {
+				CRYPTDEB("checkforsoftware");
+				goto bail;
+			}
+		} else
+			crid = CRYPTOCAP_F_HARDWARE;
+		error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
+		if (error) {
+			CRYPTDEB("crypto_newsession");
+			goto bail;
+		}
+
+		cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
+		    cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
+		    thash);
+
+		if (cse == NULL) {
+			crypto_freesession(sid);
+			error = EINVAL;
+			CRYPTDEB("csecreate");
+			goto bail;
+		}
+		sop->ses = cse->ses;
+		if (cmd == CIOCGSESSION2
+#ifdef COMPAT_FREEBSD32
+		    || cmd == CIOCGSESSION232
+#endif
+		    ) {
+			/* return hardware/driver id */
+			SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
+		}
+bail:
+		if (error) {
+			if (crie.cri_key)
+				free(crie.cri_key, M_XDATA);
+			if (cria.cri_key)
+				free(cria.cri_key, M_XDATA);
+		}
+#ifdef COMPAT_FREEBSD32
+		else {
+			if (cmd == CIOCGSESSION32)
+				session_op_to_32(sop, data);
+			else if (cmd == CIOCGSESSION232)
+				session2_op_to_32((struct session2_op *)sop,
+				    data);
+		}
+#endif
+		break;
+	case CIOCFSESSION:
+		ses = *(u_int32_t *)data;
+		cse = csefind(fcr, ses);
+		if (cse == NULL)
+			return (EINVAL);
+		csedelete(fcr, cse);
+		error = csefree(cse);
+		break;
+	case CIOCCRYPT:
+#ifdef COMPAT_FREEBSD32
+	case CIOCCRYPT32:
+		if (cmd == CIOCCRYPT32) {
+			cop = &copc;
+			crypt_op_from_32(data, cop);
+		} else
+#endif
+			cop = (struct crypt_op *)data;
+		cse = csefind(fcr, cop->ses);
+		if (cse == NULL) {
+			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+			return (EINVAL);
+		}
+		error = cryptodev_op(cse, cop, active_cred, td);
+#ifdef COMPAT_FREEBSD32
+		if (error == 0 && cmd == CIOCCRYPT32)
+			crypt_op_to_32(cop, data);
+#endif
+		break;
+	case CIOCKEY:
+	case CIOCKEY2:
+#ifdef COMPAT_FREEBSD32
+	case CIOCKEY32:
+	case CIOCKEY232:
+#endif
+		if (!crypto_userasymcrypto)
+			return (EPERM);		/* XXX compat? */
+#ifdef COMPAT_FREEBSD32
+		if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
+			kop = &kopc;
+			crypt_kop_from_32(data, kop);
+		} else
+#endif
+			kop = (struct crypt_kop *)data;
+		if (cmd == CIOCKEY
+#ifdef COMPAT_FREEBSD32
+		    || cmd == CIOCKEY32
+#endif
+		    ) {
+			/* NB: crypto core enforces s/w driver use */
+			kop->crk_crid =
+			    CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
+		}
+		mtx_lock(&Giant);
+		error = cryptodev_key(kop);
+		mtx_unlock(&Giant);
+#ifdef COMPAT_FREEBSD32
+		if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
+			crypt_kop_to_32(kop, data);
+#endif
+		break;
+	case CIOCASYMFEAT:
+		if (!crypto_userasymcrypto) {
+			/*
+			 * NB: if user asym crypto operations are
+			 * not permitted return "no algorithms"
+			 * so well-behaved applications will just
+			 * fallback to doing them in software.
+			 */
+			*(int *)data = 0;
+		} else
+			error = crypto_getfeat((int *)data);
+		break;
+	case CIOCFINDDEV:
+		error = cryptodev_find((struct crypt_find_op *)data);
+		break;
+	case CIOCCRYPTAEAD:
+		caead = (struct crypt_aead *)data;
+		cse = csefind(fcr, caead->ses);
+		if (cse == NULL)
+			return (EINVAL);
+		error = cryptodev_aead(cse, caead, active_cred, td);
+		break;
+	default:
+		error = EINVAL;
+		break;
+	}
+	return (error);
+#undef SES2
+}
+
+static int cryptodev_cb(void *);
+
+
+static int
+cryptodev_op(
+	struct csession *cse,
+	struct crypt_op *cop,
+	struct ucred *active_cred,
+	struct thread *td)
+{
+	struct cryptop *crp = NULL;
+	struct cryptodesc *crde = NULL, *crda = NULL;
+	int error;
+
+	if (cop->len > 256*1024-4) {
+		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+		return (E2BIG);
+	}
+
+	if (cse->txform) {
+		if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
+			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+			return (EINVAL);
+		}
+	}
+
+	cse->uio.uio_iov = &cse->iovec;
+	cse->uio.uio_iovcnt = 1;
+	cse->uio.uio_offset = 0;
+	cse->uio.uio_resid = cop->len;
+	cse->uio.uio_segflg = UIO_SYSSPACE;
+	cse->uio.uio_rw = UIO_WRITE;
+	cse->uio.uio_td = td;
+	cse->uio.uio_iov[0].iov_len = cop->len;
+	if (cse->thash) {
+		cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
+		cse->uio.uio_resid += cse->thash->hashsize;
+	}
+	cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len,
+	    M_XDATA, M_WAITOK);
+
+	crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
+	if (crp == NULL) {
+		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+		error = ENOMEM;
+		goto bail;
+	}
+
+	if (cse->thash) {
+		crda = crp->crp_desc;
+		if (cse->txform)
+			crde = crda->crd_next;
+	} else {
+		if (cse->txform)
+			crde = crp->crp_desc;
+		else {
+			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+			error = EINVAL;
+			goto bail;
+		}
+	}
+
+	if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base,
+	    cop->len))) {
+		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+		goto bail;
+	}
+
+	if (crda) {
+		crda->crd_skip = 0;
+		crda->crd_len = cop->len;
+		crda->crd_inject = cop->len;
+
+		crda->crd_alg = cse->mac;
+		crda->crd_key = cse->mackey;
+		crda->crd_klen = cse->mackeylen * 8;
+	}
+
+	if (crde) {
+		if (cop->op == COP_ENCRYPT)
+			crde->crd_flags |= CRD_F_ENCRYPT;
+		else
+			crde->crd_flags &= ~CRD_F_ENCRYPT;
+		crde->crd_len = cop->len;
+		crde->crd_inject = 0;
+
+		crde->crd_alg = cse->cipher;
+		crde->crd_key = cse->key;
+		crde->crd_klen = cse->keylen * 8;
+	}
+
+	crp->crp_ilen = cop->len;
+	crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
+		       | (cop->flags & COP_F_BATCH);
+	crp->crp_buf = (caddr_t)&cse->uio;
+	crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
+	crp->crp_sid = cse->sid;
+	crp->crp_opaque = (void *)cse;
+
+	if (cop->iv) {
+		if (crde == NULL) {
+			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+			error = EINVAL;
+			goto bail;
+		}
+		if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
+			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+			error = EINVAL;
+			goto bail;
+		}
+		if ((error = copyin(cop->iv, cse->tmp_iv,
+		    cse->txform->blocksize))) {
+			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+			goto bail;
+		}
+		bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
+		crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
+		crde->crd_skip = 0;
+	} else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
+		crde->crd_skip = 0;
+	} else if (crde) {
+		crde->crd_flags |= CRD_F_IV_PRESENT;
+		crde->crd_skip = cse->txform->blocksize;
+		crde->crd_len -= cse->txform->blocksize;
+	}
+
+	if (cop->mac && crda == NULL) {
+		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+		error = EINVAL;
+		goto bail;
+	}
+
+again:
+	/*
+	 * Let the dispatch run unlocked, then, interlock against the
+	 * callback before checking if the operation completed and going
+	 * to sleep.  This insures drivers don't inherit our lock which
+	 * results in a lock order reversal between crypto_dispatch forced
+	 * entry and the crypto_done callback into us.
+	 */
+	error = crypto_dispatch(crp);
+	mtx_lock(&cse->lock);
+	if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
+		error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
+	mtx_unlock(&cse->lock);
+
+	if (error != 0) {
+		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+		goto bail;
+	}
+
+	if (crp->crp_etype == EAGAIN) {
+		crp->crp_etype = 0;
+		crp->crp_flags &= ~CRYPTO_F_DONE;
+		goto again;
+	}
+
+	if (crp->crp_etype != 0) {
+		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+		error = crp->crp_etype;
+		goto bail;
+	}
+
+	if (cse->error) {
+		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+		error = cse->error;
+		goto bail;
+	}
+
+	if (cop->dst &&
+	    (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst,
+	    cop->len))) {
+		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+		goto bail;
+	}
+
+	if (cop->mac &&
+	    (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
+	    cop->mac, cse->thash->hashsize))) {
+		SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
+		goto bail;
+	}
+
+bail:
+	if (crp)
+		crypto_freereq(crp);
+	if (cse->uio.uio_iov[0].iov_base)
+		free(cse->uio.uio_iov[0].iov_base, M_XDATA);
+
+	return (error);
+}
+
+static int
+cryptodev_aead(
+	struct csession *cse,
+	struct crypt_aead *caead,
+	struct ucred *active_cred,
+	struct thread *td)
+{
+	struct uio *uio;
+	struct cryptop *crp = NULL;
+	struct cryptodesc *crde = NULL, *crda = NULL;
+	int error;
+
+	if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4)
+		return (E2BIG);
+
+	if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
+	    (caead->len % cse->txform->blocksize) != 0)
+		return (EINVAL);
+
+	uio = &cse->uio;
+	uio->uio_iov = &cse->iovec;
+	uio->uio_iovcnt = 1;
+	uio->uio_offset = 0;
+	uio->uio_resid = caead->len + caead->aadlen + cse->thash->hashsize;
+	uio->uio_segflg = UIO_SYSSPACE;
+	uio->uio_rw = UIO_WRITE;
+	uio->uio_td = td;
+	uio->uio_iov[0].iov_len = uio->uio_resid;
+
+	uio->uio_iov[0].iov_base = malloc(uio->uio_iov[0].iov_len,
+	    M_XDATA, M_WAITOK);
+
+	crp = crypto_getreq(2);
+	if (crp == NULL) {
+		error = ENOMEM;
+		goto bail;
+	}
+
+	crda = crp->crp_desc;
+	crde = crda->crd_next;
+
+	if ((error = copyin(caead->src, cse->uio.uio_iov[0].iov_base,
+	    caead->len)))
+		goto bail;
+
+	if ((error = copyin(caead->aad, (char *)cse->uio.uio_iov[0].iov_base +
+	    caead->len, caead->aadlen)))
+		goto bail;
+
+	crda->crd_skip = caead->len;
+	crda->crd_len = caead->aadlen;
+	crda->crd_inject = caead->len + caead->aadlen;
+
+	crda->crd_alg = cse->mac;
+	crda->crd_key = cse->mackey;
+	crda->crd_klen = cse->mackeylen * 8;
+
+	if (caead->op == COP_ENCRYPT)
+		crde->crd_flags |= CRD_F_ENCRYPT;
+	else
+		crde->crd_flags &= ~CRD_F_ENCRYPT;
+	/* crde->crd_skip set below */
+	crde->crd_len = caead->len;
+	crde->crd_inject = 0;
+
+	crde->crd_alg = cse->cipher;
+	crde->crd_key = cse->key;
+	crde->crd_klen = cse->keylen * 8;
+
+	crp->crp_ilen = caead->len + caead->aadlen;
+	crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
+		       | (caead->flags & COP_F_BATCH);
+	crp->crp_buf = (caddr_t)&cse->uio.uio_iov;
+	crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
+	crp->crp_sid = cse->sid;
+	crp->crp_opaque = (void *)cse;
+
+	if (caead->iv) {
+		if (caead->ivlen > sizeof cse->tmp_iv) {
+			error = EINVAL;
+			goto bail;
+		}
+
+		if ((error = copyin(caead->iv, cse->tmp_iv, caead->ivlen)))
+			goto bail;
+		bcopy(cse->tmp_iv, crde->crd_iv, caead->ivlen);
+		crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
+		crde->crd_skip = 0;
+	} else {
+		crde->crd_flags |= CRD_F_IV_PRESENT;
+		crde->crd_skip = cse->txform->blocksize;
+		crde->crd_len -= cse->txform->blocksize;
+	}
+
+	if ((error = copyin(caead->tag, (caddr_t)cse->uio.uio_iov[0].iov_base +
+	    caead->len + caead->aadlen, cse->thash->hashsize)))
+		goto bail;
+again:
+	/*
+	 * Let the dispatch run unlocked, then, interlock against the
+	 * callback before checking if the operation completed and going
+	 * to sleep.  This insures drivers don't inherit our lock which
+	 * results in a lock order reversal between crypto_dispatch forced
+	 * entry and the crypto_done callback into us.
+	 */
+	error = crypto_dispatch(crp);
+	mtx_lock(&cse->lock);
+	if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
+		error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
+	mtx_unlock(&cse->lock);
+
+	if (error != 0)
+		goto bail;
+
+	if (crp->crp_etype == EAGAIN) {
+		crp->crp_etype = 0;
+		crp->crp_flags &= ~CRYPTO_F_DONE;
+		goto again;
+	}
+
+	if (crp->crp_etype != 0) {
+		error = crp->crp_etype;
+		goto bail;
+	}
+
+	if (cse->error) {
+		error = cse->error;
+		goto bail;
+	}
+
+	if (caead->dst && (error = copyout(cse->uio.uio_iov[0].iov_base,
+	    caead->dst, caead->len)))
+		goto bail;
+
+	if ((error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base +
+	    caead->len + caead->aadlen, caead->tag, cse->thash->hashsize)))
+		goto bail;
+
+bail:
+	crypto_freereq(crp);
+	free(cse->uio.uio_iov[0].iov_base, M_XDATA);
+
+	return (error);
+}
+
+static int
+cryptodev_cb(void *op)
+{
+	struct cryptop *crp = (struct cryptop *) op;
+	struct csession *cse = (struct csession *)crp->crp_opaque;
+
+	mtx_lock(&cse->lock);
+	cse->error = crp->crp_etype;
+	wakeup_one(crp);
+	mtx_unlock(&cse->lock);
+	return (0);
+}
+
+static int
+cryptodevkey_cb(void *op)
+{
+	struct cryptkop *krp = (struct cryptkop *) op;
+
+	wakeup_one(krp);
+	return (0);
+}
+
+static int
+cryptodev_key(struct crypt_kop *kop)
+{
+	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 = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
+	if (!krp)
+		return (ENOMEM);
+	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_crid = kop->crk_crid;
+	krp->krp_status = 0;
+	krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
+
+	for (i = 0; i < CRK_MAXPARAM; i++) {
+		if (kop->crk_param[i].crp_nbits > 65536)
+			/* Limit is the same as in OpenBSD */
+			goto fail;
+		krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
+	}
+	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;
+	}
+	
+	kop->crk_crid = krp->krp_crid;		/* device that did the work */
+	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)
+				free(krp->krp_param[i].crp_p, M_XDATA);
+		}
+		free(krp, M_XDATA);
+	}
+	return (error);
+}
+
+static int
+cryptodev_find(struct crypt_find_op *find)
+{
+	device_t dev;
+	size_t fnlen = sizeof find->name;
+
+	if (find->crid != -1) {
+		dev = crypto_find_device_byhid(find->crid);
+		if (dev == NULL)
+			return (ENOENT);
+		strncpy(find->name, device_get_nameunit(dev), fnlen);
+		find->name[fnlen - 1] = '\x0';
+	} else {
+		find->name[fnlen - 1] = '\x0';
+		find->crid = crypto_find_driver(find->name);
+		if (find->crid == -1)
+			return (ENOENT);
+	}
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+cryptof_stat(
+	struct file *fp,
+	struct stat *sb,
+	struct ucred *active_cred,
+	struct thread *td)
+{
+
+	return (EOPNOTSUPP);
+}
+
+/* ARGSUSED */
+static int
+cryptof_close(struct file *fp, struct thread *td)
+{
+	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);
+	fp->f_data = NULL;
+	return 0;
+}
+
+static int
+cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
+{
+
+	kif->kf_type = KF_TYPE_CRYPTO;
+	return (0);
+}
+
+static 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);
+}
+
+static 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);
+}
+	
+static 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 | M_ZERO);
+	if (cse == NULL)
+		return NULL;
+	mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
+	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);
+}
+
+static int
+csefree(struct csession *cse)
+{
+	int error;
+
+	error = crypto_freesession(cse->sid);
+	mtx_destroy(&cse->lock);
+	if (cse->key)
+		free(cse->key, M_XDATA);
+	if (cse->mackey)
+		free(cse->mackey, M_XDATA);
+	free(cse, M_XDATA);
+	return (error);
+}
+
+static int
+cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
+{
+	return (0);
+}
+
+static int
+cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
+{
+	return (EIO);
+}
+
+static int
+cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
+{
+	return (EIO);
+}
+
+static int
+cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
+{
+	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;
+
+		error = falloc(td, &f, &fd, 0);
+
+		if (error) {
+			free(fcr, M_XDATA);
+			return (error);
+		}
+		/* falloc automatically provides an extra reference to 'f'. */
+		finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
+		*(u_int32_t *)data = fd;
+		fdrop(f, td);
+		break;
+	case CRIOFINDDEV:
+		error = cryptodev_find((struct crypt_find_op *)data);
+		break;
+	case CRIOASYMFEAT:
+		error = crypto_getfeat((int *)data);
+		break;
+	default:
+		error = EINVAL;
+		break;
+	}
+	return (error);
+}
+
+static struct cdevsw crypto_cdevsw = {
+	.d_version =	D_VERSION,
+	.d_flags =	D_NEEDGIANT,
+	.d_open =	cryptoopen,
+	.d_read =	cryptoread,
+	.d_write =	cryptowrite,
+	.d_ioctl =	cryptoioctl,
+	.d_name =	"crypto",
+};
+static struct cdev *crypto_dev;
+
+/*
+ * Initialization code, both for static and dynamic loading.
+ */
+static int
+cryptodev_modevent(module_t mod, int type, void *unused)
+{
+	switch (type) {
+	case MOD_LOAD:
+		if (bootverbose)
+			printf("crypto: <crypto device>\n");
+		crypto_dev = make_dev(&crypto_cdevsw, 0, 
+				      UID_ROOT, GID_WHEEL, 0666,
+				      "crypto");
+		return 0;
+	case MOD_UNLOAD:
+		/*XXX disallow if active sessions */
+		destroy_dev(crypto_dev);
+		return 0;
+	}
+	return EINVAL;
+}
+
+static moduledata_t cryptodev_mod = {
+	"cryptodev",
+	cryptodev_modevent,
+	0
+};
+MODULE_VERSION(cryptodev, 1);
+DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
+MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
+MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);