4de8ade94c
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
265 lines
6.6 KiB
C
265 lines
6.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2008 Isilon Inc http://www.isilon.com/
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* Authors: Doug Rabson <dfr@rabson.org>
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* Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
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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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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/kobj.h>
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#include <sys/malloc.h>
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#include <sys/md5.h>
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#include <sys/mutex.h>
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#include <sys/mbuf.h>
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#include <crypto/des/des.h>
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#include <opencrypto/cryptodev.h>
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#include <kgssapi/gssapi.h>
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#include <kgssapi/gssapi_impl.h>
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#include "kcrypto.h"
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struct des1_state {
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struct mtx ds_lock;
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uint64_t ds_session;
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};
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static void
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des1_init(struct krb5_key_state *ks)
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{
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struct des1_state *ds;
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ds = malloc(sizeof(struct des1_state), M_GSSAPI, M_WAITOK|M_ZERO);
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mtx_init(&ds->ds_lock, "gss des lock", NULL, MTX_DEF);
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ks->ks_priv = ds;
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}
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static void
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des1_destroy(struct krb5_key_state *ks)
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{
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struct des1_state *ds = ks->ks_priv;
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if (ds->ds_session)
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crypto_freesession(ds->ds_session);
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mtx_destroy(&ds->ds_lock);
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free(ks->ks_priv, M_GSSAPI);
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}
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static void
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des1_set_key(struct krb5_key_state *ks, const void *in)
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{
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void *kp = ks->ks_key;
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struct des1_state *ds = ks->ks_priv;
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struct cryptoini cri[1];
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if (kp != in)
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bcopy(in, kp, ks->ks_class->ec_keylen);
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if (ds->ds_session)
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crypto_freesession(ds->ds_session);
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bzero(cri, sizeof(cri));
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cri[0].cri_alg = CRYPTO_DES_CBC;
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cri[0].cri_klen = 64;
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cri[0].cri_mlen = 0;
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cri[0].cri_key = ks->ks_key;
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cri[0].cri_next = NULL;
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crypto_newsession(&ds->ds_session, cri,
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CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE);
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}
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static void
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des1_random_to_key(struct krb5_key_state *ks, const void *in)
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{
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uint8_t *outkey = ks->ks_key;
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const uint8_t *inkey = in;
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/*
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* Expand 56 bits of random data to 64 bits as follows
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* (in the example, bit number 1 is the MSB of the 56
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* bits of random data):
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*
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* expanded =
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* 1 2 3 4 5 6 7 p
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* 9 10 11 12 13 14 15 p
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* 17 18 19 20 21 22 23 p
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* 25 26 27 28 29 30 31 p
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* 33 34 35 36 37 38 39 p
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* 41 42 43 44 45 46 47 p
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* 49 50 51 52 53 54 55 p
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* 56 48 40 32 24 16 8 p
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*/
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outkey[0] = inkey[0];
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outkey[1] = inkey[1];
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outkey[2] = inkey[2];
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outkey[3] = inkey[3];
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outkey[4] = inkey[4];
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outkey[5] = inkey[5];
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outkey[6] = inkey[6];
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outkey[7] = (((inkey[0] & 1) << 1)
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| ((inkey[1] & 1) << 2)
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| ((inkey[2] & 1) << 3)
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| ((inkey[3] & 1) << 4)
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| ((inkey[4] & 1) << 5)
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| ((inkey[5] & 1) << 6)
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| ((inkey[6] & 1) << 7));
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des_set_odd_parity((des_cblock *) outkey);
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if (des_is_weak_key((des_cblock *) outkey))
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outkey[7] ^= 0xf0;
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des1_set_key(ks, ks->ks_key);
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}
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static int
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des1_crypto_cb(struct cryptop *crp)
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{
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int error;
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struct des1_state *ds = (struct des1_state *) crp->crp_opaque;
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if (CRYPTO_SESID2CAPS(ds->ds_session) & CRYPTOCAP_F_SYNC)
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return (0);
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error = crp->crp_etype;
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if (error == EAGAIN)
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error = crypto_dispatch(crp);
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mtx_lock(&ds->ds_lock);
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if (error || (crp->crp_flags & CRYPTO_F_DONE))
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wakeup(crp);
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mtx_unlock(&ds->ds_lock);
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return (0);
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}
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static void
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des1_encrypt_1(const struct krb5_key_state *ks, int buftype, void *buf,
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size_t skip, size_t len, void *ivec, int encdec)
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{
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struct des1_state *ds = ks->ks_priv;
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struct cryptop *crp;
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struct cryptodesc *crd;
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int error;
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crp = crypto_getreq(1);
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crd = crp->crp_desc;
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crd->crd_skip = skip;
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crd->crd_len = len;
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crd->crd_flags = CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT | encdec;
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if (ivec) {
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bcopy(ivec, crd->crd_iv, 8);
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} else {
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bzero(crd->crd_iv, 8);
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}
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crd->crd_next = NULL;
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crd->crd_alg = CRYPTO_DES_CBC;
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crp->crp_sid = ds->ds_session;
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crp->crp_flags = buftype | CRYPTO_F_CBIFSYNC;
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crp->crp_buf = buf;
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crp->crp_opaque = (void *) ds;
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crp->crp_callback = des1_crypto_cb;
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error = crypto_dispatch(crp);
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if ((CRYPTO_SESID2CAPS(ds->ds_session) & CRYPTOCAP_F_SYNC) == 0) {
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mtx_lock(&ds->ds_lock);
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if (!error && !(crp->crp_flags & CRYPTO_F_DONE))
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error = msleep(crp, &ds->ds_lock, 0, "gssdes", 0);
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mtx_unlock(&ds->ds_lock);
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}
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crypto_freereq(crp);
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}
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static void
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des1_encrypt(const struct krb5_key_state *ks, struct mbuf *inout,
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size_t skip, size_t len, void *ivec, size_t ivlen)
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{
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des1_encrypt_1(ks, CRYPTO_F_IMBUF, inout, skip, len, ivec,
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CRD_F_ENCRYPT);
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}
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static void
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des1_decrypt(const struct krb5_key_state *ks, struct mbuf *inout,
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size_t skip, size_t len, void *ivec, size_t ivlen)
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{
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des1_encrypt_1(ks, CRYPTO_F_IMBUF, inout, skip, len, ivec, 0);
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}
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static int
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MD5Update_int(void *ctx, void *buf, u_int len)
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{
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MD5Update(ctx, buf, len);
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return (0);
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}
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static void
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des1_checksum(const struct krb5_key_state *ks, int usage,
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struct mbuf *inout, size_t skip, size_t inlen, size_t outlen)
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{
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char hash[16];
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MD5_CTX md5;
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/*
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* This checksum is specifically for GSS-API. First take the
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* MD5 checksum of the message, then calculate the CBC mode
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* checksum of that MD5 checksum using a zero IV.
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*/
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MD5Init(&md5);
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m_apply(inout, skip, inlen, MD5Update_int, &md5);
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MD5Final(hash, &md5);
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des1_encrypt_1(ks, 0, hash, 0, 16, NULL, CRD_F_ENCRYPT);
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m_copyback(inout, skip + inlen, outlen, hash + 8);
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}
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struct krb5_encryption_class krb5_des_encryption_class = {
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"des-cbc-md5", /* name */
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ETYPE_DES_CBC_CRC, /* etype */
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0, /* flags */
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8, /* blocklen */
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8, /* msgblocklen */
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8, /* checksumlen */
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56, /* keybits */
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8, /* keylen */
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des1_init,
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des1_destroy,
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des1_set_key,
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des1_random_to_key,
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des1_encrypt,
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des1_decrypt,
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des1_checksum
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};
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