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/*-
* Copyright (c) 2008 Isilon Inc http://www.isilon.com/
* Authors: Doug Rabson <dfr@rabson.org>
* Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/kgssapi/krb5/kcrypto_des3.c 184588 2008-11-03 10:38:00Z dfr $");
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/kobj.h>
#include <sys/mbuf.h>
#include <crypto/des/des.h>
#include <opencrypto/cryptodev.h>
#include <kgssapi/gssapi.h>
#include <kgssapi/gssapi_impl.h>
#include "kcrypto.h"
#define DES3_FLAGS (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)
struct des3_state {
struct mtx ds_lock;
uint64_t ds_session;
};
static void
des3_init(struct krb5_key_state *ks)
{
struct des3_state *ds;
ds = malloc(sizeof(struct des3_state), M_GSSAPI, M_WAITOK|M_ZERO);
mtx_init(&ds->ds_lock, "gss des3 lock", NULL, MTX_DEF);
ks->ks_priv = ds;
}
static void
des3_destroy(struct krb5_key_state *ks)
{
struct des3_state *ds = ks->ks_priv;
if (ds->ds_session)
crypto_freesession(ds->ds_session);
mtx_destroy(&ds->ds_lock);
free(ks->ks_priv, M_GSSAPI);
}
static void
des3_set_key(struct krb5_key_state *ks, const void *in)
{
void *kp = ks->ks_key;
struct des3_state *ds = ks->ks_priv;
struct cryptoini cri[2];
if (kp != in)
bcopy(in, kp, ks->ks_class->ec_keylen);
if (ds->ds_session)
crypto_freesession(ds->ds_session);
bzero(cri, sizeof(cri));
cri[0].cri_alg = CRYPTO_SHA1_HMAC;
cri[0].cri_klen = 192;
cri[0].cri_mlen = 0;
cri[0].cri_key = ks->ks_key;
cri[0].cri_next = &cri[1];
cri[1].cri_alg = CRYPTO_3DES_CBC;
cri[1].cri_klen = 192;
cri[1].cri_mlen = 0;
cri[1].cri_key = ks->ks_key;
cri[1].cri_next = NULL;
crypto_newsession(&ds->ds_session, cri,
CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE);
}
static void
des3_random_to_key(struct krb5_key_state *ks, const void *in)
{
uint8_t *outkey;
const uint8_t *inkey;
int subkey;
for (subkey = 0, outkey = ks->ks_key, inkey = in; subkey < 3;
subkey++, outkey += 8, inkey += 7) {
/*
* Expand 56 bits of random data to 64 bits as follows
* (in the example, bit number 1 is the MSB of the 56
* bits of random data):
*
* expanded =
* 1 2 3 4 5 6 7 p
* 9 10 11 12 13 14 15 p
* 17 18 19 20 21 22 23 p
* 25 26 27 28 29 30 31 p
* 33 34 35 36 37 38 39 p
* 41 42 43 44 45 46 47 p
* 49 50 51 52 53 54 55 p
* 56 48 40 32 24 16 8 p
*/
outkey[0] = inkey[0];
outkey[1] = inkey[1];
outkey[2] = inkey[2];
outkey[3] = inkey[3];
outkey[4] = inkey[4];
outkey[5] = inkey[5];
outkey[6] = inkey[6];
outkey[7] = (((inkey[0] & 1) << 1)
| ((inkey[1] & 1) << 2)
| ((inkey[2] & 1) << 3)
| ((inkey[3] & 1) << 4)
| ((inkey[4] & 1) << 5)
| ((inkey[5] & 1) << 6)
| ((inkey[6] & 1) << 7));
des_set_odd_parity((des_cblock *) outkey);
if (des_is_weak_key((des_cblock *) outkey))
outkey[7] ^= 0xf0;
}
des3_set_key(ks, ks->ks_key);
}
static int
des3_crypto_cb(struct cryptop *crp)
{
int error;
struct des3_state *ds = (struct des3_state *) crp->crp_opaque;
if (CRYPTO_SESID2CAPS(ds->ds_session) & CRYPTOCAP_F_SYNC)
return (0);
error = crp->crp_etype;
if (error == EAGAIN)
error = crypto_dispatch(crp);
mtx_lock(&ds->ds_lock);
if (error || (crp->crp_flags & CRYPTO_F_DONE))
wakeup(crp);
mtx_unlock(&ds->ds_lock);
return (0);
}
static void
des3_encrypt_1(const struct krb5_key_state *ks, struct mbuf *inout,
size_t skip, size_t len, void *ivec, int encdec)
{
struct des3_state *ds = ks->ks_priv;
struct cryptop *crp;
struct cryptodesc *crd;
int error;
crp = crypto_getreq(1);
crd = crp->crp_desc;
crd->crd_skip = skip;
crd->crd_len = len;
crd->crd_flags = CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT | encdec;
if (ivec) {
bcopy(ivec, crd->crd_iv, 8);
} else {
bzero(crd->crd_iv, 8);
}
crd->crd_next = NULL;
crd->crd_alg = CRYPTO_3DES_CBC;
crp->crp_sid = ds->ds_session;
crp->crp_flags = CRYPTO_F_IMBUF | CRYPTO_F_CBIFSYNC;
crp->crp_buf = (void *) inout;
crp->crp_opaque = (void *) ds;
crp->crp_callback = des3_crypto_cb;
error = crypto_dispatch(crp);
if ((CRYPTO_SESID2CAPS(ds->ds_session) & CRYPTOCAP_F_SYNC) == 0) {
mtx_lock(&ds->ds_lock);
if (!error && !(crp->crp_flags & CRYPTO_F_DONE))
error = msleep(crp, &ds->ds_lock, 0, "gssdes3", 0);
mtx_unlock(&ds->ds_lock);
}
crypto_freereq(crp);
}
static void
des3_encrypt(const struct krb5_key_state *ks, struct mbuf *inout,
size_t skip, size_t len, void *ivec, size_t ivlen)
{
des3_encrypt_1(ks, inout, skip, len, ivec, CRD_F_ENCRYPT);
}
static void
des3_decrypt(const struct krb5_key_state *ks, struct mbuf *inout,
size_t skip, size_t len, void *ivec, size_t ivlen)
{
des3_encrypt_1(ks, inout, skip, len, ivec, 0);
}
static void
des3_checksum(const struct krb5_key_state *ks, int usage,
struct mbuf *inout, size_t skip, size_t inlen, size_t outlen)
{
struct des3_state *ds = ks->ks_priv;
struct cryptop *crp;
struct cryptodesc *crd;
int error;
crp = crypto_getreq(1);
crd = crp->crp_desc;
crd->crd_skip = skip;
crd->crd_len = inlen;
crd->crd_inject = skip + inlen;
crd->crd_flags = 0;
crd->crd_next = NULL;
crd->crd_alg = CRYPTO_SHA1_HMAC;
crp->crp_sid = ds->ds_session;
crp->crp_ilen = inlen;
crp->crp_olen = 20;
crp->crp_etype = 0;
crp->crp_flags = CRYPTO_F_IMBUF | CRYPTO_F_CBIFSYNC;
crp->crp_buf = (void *) inout;
crp->crp_opaque = (void *) ds;
crp->crp_callback = des3_crypto_cb;
error = crypto_dispatch(crp);
if ((CRYPTO_SESID2CAPS(ds->ds_session) & CRYPTOCAP_F_SYNC) == 0) {
mtx_lock(&ds->ds_lock);
if (!error && !(crp->crp_flags & CRYPTO_F_DONE))
error = msleep(crp, &ds->ds_lock, 0, "gssdes3", 0);
mtx_unlock(&ds->ds_lock);
}
crypto_freereq(crp);
}
struct krb5_encryption_class krb5_des3_encryption_class = {
"des3-cbc-sha1", /* name */
ETYPE_DES3_CBC_SHA1, /* etype */
EC_DERIVED_KEYS, /* flags */
8, /* blocklen */
8, /* msgblocklen */
20, /* checksumlen */
168, /* keybits */
24, /* keylen */
des3_init,
des3_destroy,
des3_set_key,
des3_random_to_key,
des3_encrypt,
des3_decrypt,
des3_checksum
};
#if 0
struct des3_dk_test {
uint8_t key[24];
uint8_t usage[8];
size_t usagelen;
uint8_t dk[24];
};
struct des3_dk_test tests[] = {
{{0xdc, 0xe0, 0x6b, 0x1f, 0x64, 0xc8, 0x57, 0xa1, 0x1c, 0x3d, 0xb5,
0x7c, 0x51, 0x89, 0x9b, 0x2c, 0xc1, 0x79, 0x10, 0x08, 0xce, 0x97,
0x3b, 0x92},
{0x00, 0x00, 0x00, 0x01, 0x55}, 5,
{0x92, 0x51, 0x79, 0xd0, 0x45, 0x91, 0xa7, 0x9b, 0x5d, 0x31, 0x92,
0xc4, 0xa7, 0xe9, 0xc2, 0x89, 0xb0, 0x49, 0xc7, 0x1f, 0x6e, 0xe6,
0x04, 0xcd}},
{{0x5e, 0x13, 0xd3, 0x1c, 0x70, 0xef, 0x76, 0x57, 0x46, 0x57, 0x85,
0x31, 0xcb, 0x51, 0xc1, 0x5b, 0xf1, 0x1c, 0xa8, 0x2c, 0x97, 0xce,
0xe9, 0xf2},
{0x00, 0x00, 0x00, 0x01, 0xaa}, 5,
{0x9e, 0x58, 0xe5, 0xa1, 0x46, 0xd9, 0x94, 0x2a, 0x10, 0x1c, 0x46,
0x98, 0x45, 0xd6, 0x7a, 0x20, 0xe3, 0xc4, 0x25, 0x9e, 0xd9, 0x13,
0xf2, 0x07}},
{{0x98, 0xe6, 0xfd, 0x8a, 0x04, 0xa4, 0xb6, 0x85, 0x9b, 0x75, 0xa1,
0x76, 0x54, 0x0b, 0x97, 0x52, 0xba, 0xd3, 0xec, 0xd6, 0x10, 0xa2,
0x52, 0xbc},
{0x00, 0x00, 0x00, 0x01, 0x55}, 5,
{0x13, 0xfe, 0xf8, 0x0d, 0x76, 0x3e, 0x94, 0xec, 0x6d, 0x13, 0xfd,
0x2c, 0xa1, 0xd0, 0x85, 0x07, 0x02, 0x49, 0xda, 0xd3, 0x98, 0x08,
0xea, 0xbf}},
{{0x62, 0x2a, 0xec, 0x25, 0xa2, 0xfe, 0x2c, 0xad, 0x70, 0x94, 0x68,
0x0b, 0x7c, 0x64, 0x94, 0x02, 0x80, 0x08, 0x4c, 0x1a, 0x7c, 0xec,
0x92, 0xb5},
{0x00, 0x00, 0x00, 0x01, 0xaa}, 5,
{0xf8, 0xdf, 0xbf, 0x04, 0xb0, 0x97, 0xe6, 0xd9, 0xdc, 0x07, 0x02,
0x68, 0x6b, 0xcb, 0x34, 0x89, 0xd9, 0x1f, 0xd9, 0xa4, 0x51, 0x6b,
0x70, 0x3e}},
{{0xd3, 0xf8, 0x29, 0x8c, 0xcb, 0x16, 0x64, 0x38, 0xdc, 0xb9, 0xb9,
0x3e, 0xe5, 0xa7, 0x62, 0x92, 0x86, 0xa4, 0x91, 0xf8, 0x38, 0xf8,
0x02, 0xfb},
{0x6b, 0x65, 0x72, 0x62, 0x65, 0x72, 0x6f, 0x73}, 8,
{0x23, 0x70, 0xda, 0x57, 0x5d, 0x2a, 0x3d, 0xa8, 0x64, 0xce, 0xbf,
0xdc, 0x52, 0x04, 0xd5, 0x6d, 0xf7, 0x79, 0xa7, 0xdf, 0x43, 0xd9,
0xda, 0x43}},
{{0xc1, 0x08, 0x16, 0x49, 0xad, 0xa7, 0x43, 0x62, 0xe6, 0xa1, 0x45,
0x9d, 0x01, 0xdf, 0xd3, 0x0d, 0x67, 0xc2, 0x23, 0x4c, 0x94, 0x07,
0x04, 0xda},
{0x00, 0x00, 0x00, 0x01, 0x55}, 5,
{0x34, 0x80, 0x57, 0xec, 0x98, 0xfd, 0xc4, 0x80, 0x16, 0x16, 0x1c,
0x2a, 0x4c, 0x7a, 0x94, 0x3e, 0x92, 0xae, 0x49, 0x2c, 0x98, 0x91,
0x75, 0xf7}},
{{0x5d, 0x15, 0x4a, 0xf2, 0x38, 0xf4, 0x67, 0x13, 0x15, 0x57, 0x19,
0xd5, 0x5e, 0x2f, 0x1f, 0x79, 0x0d, 0xd6, 0x61, 0xf2, 0x79, 0xa7,
0x91, 0x7c},
{0x00, 0x00, 0x00, 0x01, 0xaa}, 5,
{0xa8, 0x80, 0x8a, 0xc2, 0x67, 0xda, 0xda, 0x3d, 0xcb, 0xe9, 0xa7,
0xc8, 0x46, 0x26, 0xfb, 0xc7, 0x61, 0xc2, 0x94, 0xb0, 0x13, 0x15,
0xe5, 0xc1}},
{{0x79, 0x85, 0x62, 0xe0, 0x49, 0x85, 0x2f, 0x57, 0xdc, 0x8c, 0x34,
0x3b, 0xa1, 0x7f, 0x2c, 0xa1, 0xd9, 0x73, 0x94, 0xef, 0xc8, 0xad,
0xc4, 0x43},
{0x00, 0x00, 0x00, 0x01, 0x55}, 5,
{0xc8, 0x13, 0xf8, 0x8a, 0x3b, 0xe3, 0xb3, 0x34, 0xf7, 0x54, 0x25,
0xce, 0x91, 0x75, 0xfb, 0xe3, 0xc8, 0x49, 0x3b, 0x89, 0xc8, 0x70,
0x3b, 0x49}},
{{0x26, 0xdc, 0xe3, 0x34, 0xb5, 0x45, 0x29, 0x2f, 0x2f, 0xea, 0xb9,
0xa8, 0x70, 0x1a, 0x89, 0xa4, 0xb9, 0x9e, 0xb9, 0x94, 0x2c, 0xec,
0xd0, 0x16},
{0x00, 0x00, 0x00, 0x01, 0xaa}, 5,
{0xf4, 0x8f, 0xfd, 0x6e, 0x83, 0xf8, 0x3e, 0x73, 0x54, 0xe6, 0x94,
0xfd, 0x25, 0x2c, 0xf8, 0x3b, 0xfe, 0x58, 0xf7, 0xd5, 0xba, 0x37,
0xec, 0x5d}},
};
#define N_TESTS (sizeof(tests) / sizeof(tests[0]))
int
main(int argc, char **argv)
{
struct krb5_key_state *key, *dk;
uint8_t *dkp;
int j, i;
for (j = 0; j < N_TESTS; j++) {
struct des3_dk_test *t = &tests[j];
key = krb5_create_key(&des3_encryption_class);
krb5_set_key(key, t->key);
dk = krb5_derive_key(key, t->usage, t->usagelen);
krb5_free_key(key);
if (memcmp(dk->ks_key, t->dk, 24)) {
printf("DES3 dk(");
for (i = 0; i < 24; i++)
printf("%02x", t->key[i]);
printf(", ");
for (i = 0; i < t->usagelen; i++)
printf("%02x", t->usage[i]);
printf(") failed\n");
printf("should be: ");
for (i = 0; i < 24; i++)
printf("%02x", t->dk[i]);
printf("\n result was: ");
dkp = dk->ks_key;
for (i = 0; i < 24; i++)
printf("%02x", dkp[i]);
printf("\n");
}
krb5_free_key(dk);
}
return (0);
}
#endif