ae77177087
several new kerberos related libraries and applications to FreeBSD:
o kgetcred(1) allows one to manually get a ticket for a particular service.
o kf(1) securily forwards ticket to another host through an authenticated
and encrypted stream.
o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1)
and other user kerberos operations. klist and kswitch are just symlinks
to kcc(1) now.
o kswitch(1) allows you to easily switch between kerberos credentials if
you're running KCM.
o hxtool(1) is a certificate management tool to use with PKINIT.
o string2key(1) maps a password into key.
o kdigest(8) is a userland tool to access the KDC's digest interface.
o kimpersonate(8) creates a "fake" ticket for a service.
We also now install manpages for some lirbaries that were not installed
before, libheimntlm and libhx509.
- The new HEIMDAL version no longer supports Kerberos 4. All users are
recommended to switch to Kerberos 5.
- Weak ciphers are now disabled by default. To enable DES support (used
by telnet(8)), use "allow_weak_crypto" option in krb5.conf.
- libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings
disabled due to the function they use (krb5_get_err_text(3)) being
deprecated. I plan to work on this next.
- Heimdal's KDC now require sqlite to operate. We use the bundled version
and install it as libheimsqlite. If some other FreeBSD components will
require it in the future we can rename it to libbsdsqlite and use for these
components as well.
- This is not a latest Heimdal version, the new one was released while I was
working on the update. I will update it to 1.5.2 soon, as it fixes some
important bugs and security issues.
378 lines
8.8 KiB
C
378 lines
8.8 KiB
C
/*
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* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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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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*
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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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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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 "krb5_locl.h"
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#ifdef HEIM_WEAK_CRYPTO
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static void
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krb5_DES_random_key(krb5_context context,
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krb5_keyblock *key)
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{
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DES_cblock *k = key->keyvalue.data;
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do {
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krb5_generate_random_block(k, sizeof(DES_cblock));
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DES_set_odd_parity(k);
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} while(DES_is_weak_key(k));
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}
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static void
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krb5_DES_schedule_old(krb5_context context,
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struct _krb5_key_type *kt,
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struct _krb5_key_data *key)
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{
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DES_set_key_unchecked(key->key->keyvalue.data, key->schedule->data);
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}
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static void
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krb5_DES_random_to_key(krb5_context context,
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krb5_keyblock *key,
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const void *data,
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size_t size)
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{
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DES_cblock *k = key->keyvalue.data;
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memcpy(k, data, key->keyvalue.length);
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DES_set_odd_parity(k);
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if(DES_is_weak_key(k))
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_krb5_xor(k, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
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}
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static struct _krb5_key_type keytype_des_old = {
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ETYPE_DES_CBC_CRC,
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"des-old",
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56,
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8,
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sizeof(DES_key_schedule),
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krb5_DES_random_key,
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krb5_DES_schedule_old,
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_krb5_des_salt,
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krb5_DES_random_to_key,
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NULL,
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NULL
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};
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static struct _krb5_key_type keytype_des = {
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ETYPE_DES_CBC_CRC,
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"des",
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56,
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8,
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sizeof(struct _krb5_evp_schedule),
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krb5_DES_random_key,
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_krb5_evp_schedule,
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_krb5_des_salt,
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krb5_DES_random_to_key,
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_krb5_evp_cleanup,
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EVP_des_cbc
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};
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static krb5_error_code
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CRC32_checksum(krb5_context context,
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struct _krb5_key_data *key,
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const void *data,
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size_t len,
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unsigned usage,
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Checksum *C)
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{
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uint32_t crc;
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unsigned char *r = C->checksum.data;
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_krb5_crc_init_table ();
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crc = _krb5_crc_update (data, len, 0);
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r[0] = crc & 0xff;
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r[1] = (crc >> 8) & 0xff;
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r[2] = (crc >> 16) & 0xff;
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r[3] = (crc >> 24) & 0xff;
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return 0;
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}
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static krb5_error_code
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RSA_MD4_checksum(krb5_context context,
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struct _krb5_key_data *key,
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const void *data,
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size_t len,
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unsigned usage,
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Checksum *C)
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{
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if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_md4(), NULL) != 1)
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krb5_abortx(context, "md4 checksum failed");
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return 0;
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}
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static krb5_error_code
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RSA_MD4_DES_checksum(krb5_context context,
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struct _krb5_key_data *key,
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const void *data,
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size_t len,
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unsigned usage,
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Checksum *cksum)
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{
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return _krb5_des_checksum(context, EVP_md4(), key, data, len, cksum);
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}
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static krb5_error_code
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RSA_MD4_DES_verify(krb5_context context,
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struct _krb5_key_data *key,
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const void *data,
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size_t len,
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unsigned usage,
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Checksum *C)
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{
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return _krb5_des_verify(context, EVP_md4(), key, data, len, C);
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}
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static krb5_error_code
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RSA_MD5_DES_checksum(krb5_context context,
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struct _krb5_key_data *key,
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const void *data,
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size_t len,
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unsigned usage,
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Checksum *C)
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{
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return _krb5_des_checksum(context, EVP_md5(), key, data, len, C);
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}
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static krb5_error_code
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RSA_MD5_DES_verify(krb5_context context,
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struct _krb5_key_data *key,
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const void *data,
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size_t len,
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unsigned usage,
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Checksum *C)
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{
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return _krb5_des_verify(context, EVP_md5(), key, data, len, C);
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}
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struct _krb5_checksum_type _krb5_checksum_crc32 = {
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CKSUMTYPE_CRC32,
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"crc32",
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1,
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4,
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0,
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CRC32_checksum,
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NULL
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};
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struct _krb5_checksum_type _krb5_checksum_rsa_md4 = {
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CKSUMTYPE_RSA_MD4,
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"rsa-md4",
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64,
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16,
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F_CPROOF,
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RSA_MD4_checksum,
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NULL
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};
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struct _krb5_checksum_type _krb5_checksum_rsa_md4_des = {
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CKSUMTYPE_RSA_MD4_DES,
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"rsa-md4-des",
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64,
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24,
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F_KEYED | F_CPROOF | F_VARIANT,
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RSA_MD4_DES_checksum,
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RSA_MD4_DES_verify
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};
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struct _krb5_checksum_type _krb5_checksum_rsa_md5_des = {
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CKSUMTYPE_RSA_MD5_DES,
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"rsa-md5-des",
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64,
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24,
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F_KEYED | F_CPROOF | F_VARIANT,
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RSA_MD5_DES_checksum,
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RSA_MD5_DES_verify
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};
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static krb5_error_code
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evp_des_encrypt_null_ivec(krb5_context context,
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struct _krb5_key_data *key,
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void *data,
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size_t len,
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krb5_boolean encryptp,
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int usage,
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void *ignore_ivec)
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{
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struct _krb5_evp_schedule *ctx = key->schedule->data;
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EVP_CIPHER_CTX *c;
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DES_cblock ivec;
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memset(&ivec, 0, sizeof(ivec));
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c = encryptp ? &ctx->ectx : &ctx->dctx;
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EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
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EVP_Cipher(c, data, data, len);
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return 0;
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}
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static krb5_error_code
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evp_des_encrypt_key_ivec(krb5_context context,
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struct _krb5_key_data *key,
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void *data,
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size_t len,
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krb5_boolean encryptp,
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int usage,
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void *ignore_ivec)
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{
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struct _krb5_evp_schedule *ctx = key->schedule->data;
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EVP_CIPHER_CTX *c;
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DES_cblock ivec;
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memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
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c = encryptp ? &ctx->ectx : &ctx->dctx;
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EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
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EVP_Cipher(c, data, data, len);
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return 0;
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}
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static krb5_error_code
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DES_CFB64_encrypt_null_ivec(krb5_context context,
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struct _krb5_key_data *key,
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void *data,
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size_t len,
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krb5_boolean encryptp,
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int usage,
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void *ignore_ivec)
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{
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DES_cblock ivec;
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int num = 0;
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DES_key_schedule *s = key->schedule->data;
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memset(&ivec, 0, sizeof(ivec));
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DES_cfb64_encrypt(data, data, len, s, &ivec, &num, encryptp);
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return 0;
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}
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static krb5_error_code
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DES_PCBC_encrypt_key_ivec(krb5_context context,
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struct _krb5_key_data *key,
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void *data,
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size_t len,
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krb5_boolean encryptp,
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int usage,
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void *ignore_ivec)
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{
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DES_cblock ivec;
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DES_key_schedule *s = key->schedule->data;
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memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
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DES_pcbc_encrypt(data, data, len, s, &ivec, encryptp);
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return 0;
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}
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struct _krb5_encryption_type _krb5_enctype_des_cbc_crc = {
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ETYPE_DES_CBC_CRC,
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"des-cbc-crc",
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8,
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8,
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8,
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&keytype_des,
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&_krb5_checksum_crc32,
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NULL,
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F_DISABLED|F_WEAK,
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evp_des_encrypt_key_ivec,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_cbc_md4 = {
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ETYPE_DES_CBC_MD4,
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"des-cbc-md4",
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8,
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8,
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8,
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&keytype_des,
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&_krb5_checksum_rsa_md4,
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&_krb5_checksum_rsa_md4_des,
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F_DISABLED|F_WEAK,
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evp_des_encrypt_null_ivec,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_cbc_md5 = {
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ETYPE_DES_CBC_MD5,
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"des-cbc-md5",
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8,
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8,
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8,
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&keytype_des,
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&_krb5_checksum_rsa_md5,
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&_krb5_checksum_rsa_md5_des,
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F_DISABLED|F_WEAK,
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evp_des_encrypt_null_ivec,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_cbc_none = {
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ETYPE_DES_CBC_NONE,
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"des-cbc-none",
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8,
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8,
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0,
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&keytype_des,
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&_krb5_checksum_none,
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NULL,
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F_PSEUDO|F_DISABLED|F_WEAK,
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evp_des_encrypt_null_ivec,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_cfb64_none = {
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ETYPE_DES_CFB64_NONE,
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"des-cfb64-none",
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1,
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1,
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0,
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&keytype_des_old,
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&_krb5_checksum_none,
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NULL,
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F_PSEUDO|F_DISABLED|F_WEAK,
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DES_CFB64_encrypt_null_ivec,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_pcbc_none = {
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ETYPE_DES_PCBC_NONE,
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"des-pcbc-none",
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8,
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8,
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0,
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&keytype_des_old,
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&_krb5_checksum_none,
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NULL,
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F_PSEUDO|F_DISABLED|F_WEAK,
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DES_PCBC_encrypt_key_ivec,
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0,
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NULL
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};
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#endif /* HEIM_WEAK_CRYPTO */
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