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heimdal/lib/krb5/test_pac.c
Isaac Boukris 2ffaba9401 kdc: sign ticket using Windows PAC 
Split Windows PAC signing and verification logic, as the signing has to be when
the ticket is ready.

Create sign and verify the PAC KDC signature if the plugin did not, allowing
for S4U2Proxy to work, instead of KRB5SignedPath.

Use the header key to verify PAC server signature, as the same key used to
encrypt/decrypt the ticket should be used for PAC server signature, like U2U
tickets are signed witht the tgt session-key and not with the longterm key,
and so krbtgt should be no different and the header key should be used.

Lookup the delegated client in DB instead of passing the delegator DB entry.

Add PAC ticket-signatures and related functions.

Note: due to the change from KRB5SignedPath to PAC, S4U2Proxy requests
against new KDC will not work if the evidence ticket was acquired from
an old KDC, and vide versa.

Closes: #767
2021-09-19 13:25:27 +10:00

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/*
* Copyright (c) 2006 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* 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. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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 "krb5_locl.h"
/*
* This PAC and keys are copied (with permission) from Samba torture
* regression test suite, they where created by Andrew Bartlet.
*/
static const unsigned char saved_pac[] = {
0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xd8, 0x01, 0x00, 0x00,
0x48, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00,
0x20, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
0x40, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
0x58, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x10, 0x08, 0x00, 0xcc, 0xcc, 0xcc, 0xcc,
0xc8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x30, 0xdf, 0xa6, 0xcb,
0x4f, 0x7d, 0xc5, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0x7f, 0xc0, 0x3c, 0x4e, 0x59, 0x62, 0x73, 0xc5, 0x01, 0xc0, 0x3c, 0x4e, 0x59,
0x62, 0x73, 0xc5, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, 0x16, 0x00, 0x16, 0x00,
0x04, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,
0x0c, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,
0x14, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x02, 0x00, 0x65, 0x00, 0x00, 0x00,
0xed, 0x03, 0x00, 0x00, 0x04, 0x02, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x02, 0x00,
0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x14, 0x00, 0x16, 0x00, 0x20, 0x00, 0x02, 0x00, 0x16, 0x00, 0x18, 0x00,
0x24, 0x00, 0x02, 0x00, 0x28, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0b, 0x00, 0x00, 0x00,
0x57, 0x00, 0x32, 0x00, 0x30, 0x00, 0x30, 0x00, 0x33, 0x00, 0x46, 0x00, 0x49, 0x00, 0x4e, 0x00,
0x41, 0x00, 0x4c, 0x00, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x04, 0x02, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00,
0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00, 0x57, 0x00, 0x32, 0x00,
0x30, 0x00, 0x30, 0x00, 0x33, 0x00, 0x46, 0x00, 0x49, 0x00, 0x4e, 0x00, 0x41, 0x00, 0x4c, 0x00,
0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x57, 0x00, 0x49, 0x00,
0x4e, 0x00, 0x32, 0x00, 0x4b, 0x00, 0x33, 0x00, 0x54, 0x00, 0x48, 0x00, 0x49, 0x00, 0x4e, 0x00,
0x4b, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05,
0x15, 0x00, 0x00, 0x00, 0x11, 0x2f, 0xaf, 0xb5, 0x90, 0x04, 0x1b, 0xec, 0x50, 0x3b, 0xec, 0xdc,
0x01, 0x00, 0x00, 0x00, 0x30, 0x00, 0x02, 0x00, 0x07, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x80, 0x66, 0x28, 0xea, 0x37, 0x80, 0xc5, 0x01, 0x16, 0x00, 0x77, 0x00, 0x32, 0x00, 0x30, 0x00,
0x30, 0x00, 0x33, 0x00, 0x66, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x61, 0x00, 0x6c, 0x00, 0x24, 0x00,
0x76, 0xff, 0xff, 0xff, 0x37, 0xd5, 0xb0, 0xf7, 0x24, 0xf0, 0xd6, 0xd4, 0xec, 0x09, 0x86, 0x5a,
0xa0, 0xe8, 0xc3, 0xa9, 0x00, 0x00, 0x00, 0x00, 0x76, 0xff, 0xff, 0xff, 0xb4, 0xd8, 0xb8, 0xfe,
0x83, 0xb3, 0x13, 0x3f, 0xfc, 0x5c, 0x41, 0xad, 0xe2, 0x64, 0x83, 0xe0, 0x00, 0x00, 0x00, 0x00
};
static int type_1_length = 472;
static const krb5_keyblock kdc_keyblock = {
ETYPE_ARCFOUR_HMAC_MD5,
{ 16, "\xB2\x86\x75\x71\x48\xAF\x7F\xD2\x52\xC5\x36\x03\xA1\x50\xB7\xE7" }
};
static const krb5_keyblock member_keyblock = {
ETYPE_ARCFOUR_HMAC_MD5,
{ 16, "\xD2\x17\xFA\xEA\xE5\xE6\xB5\xF9\x5C\xCC\x94\x07\x7A\xB8\xA5\xFC" }
};
static time_t authtime = 1120440609;
static const char *user = "w2003final$";
/*
* This pac from Christan Krause
*/
static const unsigned char saved_pac2[] =
"\x05\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\xc8\x01\x00\x00"
"\x58\x00\x00\x00\x00\x00\x00\x00\x0a\x00\x00\x00\x18\x00\x00\x00"
"\x20\x02\x00\x00\x00\x00\x00\x00\x0c\x00\x00\x00\x70\x00\x00\x00"
"\x38\x02\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x14\x00\x00\x00"
"\xa8\x02\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x14\x00\x00\x00"
"\xc0\x02\x00\x00\x00\x00\x00\x00\x01\x10\x08\x00\xcc\xcc\xcc\xcc"
"\xb8\x01\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x7d\xee\x09\x76"
"\xf2\x39\xc9\x01\xff\xff\xff\xff\xff\xff\xff\x7f\xff\xff\xff\xff"
"\xff\xff\xff\x7f\x6d\x49\x38\x62\xf2\x39\xc9\x01\x6d\x09\xa2\x8c"
"\xbb\x3a\xc9\x01\xff\xff\xff\xff\xff\xff\xff\x7f\x0e\x00\x0e\x00"
"\x04\x00\x02\x00\x10\x00\x10\x00\x08\x00\x02\x00\x00\x00\x00\x00"
"\x0c\x00\x02\x00\x00\x00\x00\x00\x10\x00\x02\x00\x00\x00\x00\x00"
"\x14\x00\x02\x00\x00\x00\x00\x00\x18\x00\x02\x00\x02\x01\x00\x00"
"\x52\x04\x00\x00\x01\x02\x00\x00\x03\x00\x00\x00\x1c\x00\x02\x00"
"\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x10\x00\x12\x00\x20\x00\x02\x00\x0e\x00\x10\x00"
"\x24\x00\x02\x00\x28\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x10\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x07\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00"
"\x6f\x00\x70\x00\x65\x00\x6e\x00\x6d\x00\x73\x00\x70\x00\x00\x00"
"\x08\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00\x6f\x00\x70\x00"
"\x65\x00\x6e\x00\x20\x00\x6d\x00\x73\x00\x70\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00"
"\x60\x04\x00\x00\x07\x00\x00\x00\x01\x02\x00\x00\x07\x00\x00\x00"
"\x5e\x04\x00\x00\x07\x00\x00\x00\x09\x00\x00\x00\x00\x00\x00\x00"
"\x08\x00\x00\x00\x43\x00\x48\x00\x4b\x00\x52\x00\x2d\x00\x41\x00"
"\x44\x00\x53\x00\x08\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00"
"\x4d\x00\x53\x00\x50\x00\x2d\x00\x41\x00\x44\x00\x53\x00\x00\x00"
"\x04\x00\x00\x00\x01\x04\x00\x00\x00\x00\x00\x05\x15\x00\x00\x00"
"\x91\xad\xdc\x4c\x63\xb8\xb5\x48\xd5\x53\xd2\xd1\x00\x00\x00\x00"
"\x00\x66\xeb\x75\xf2\x39\xc9\x01\x0e\x00\x6f\x00\x70\x00\x65\x00"
"\x6e\x00\x6d\x00\x73\x00\x70\x00\x38\x00\x10\x00\x28\x00\x48\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x6f\x00\x70\x00\x65\x00\x6e\x00"
"\x6d\x00\x73\x00\x70\x00\x40\x00\x6d\x00\x73\x00\x70\x00\x2d\x00"
"\x61\x00\x64\x00\x73\x00\x2e\x00\x70\x00\x65\x00\x70\x00\x70\x00"
"\x65\x00\x72\x00\x63\x00\x6f\x00\x6e\x00\x2e\x00\x64\x00\x65\x00"
"\x4d\x00\x53\x00\x50\x00\x2d\x00\x41\x00\x44\x00\x53\x00\x2e\x00"
"\x50\x00\x45\x00\x50\x00\x50\x00\x45\x00\x52\x00\x43\x00\x4f\x00"
"\x4e\x00\x2e\x00\x44\x00\x45\x00\x76\xff\xff\xff\xb3\x56\x15\x29"
"\x37\xc6\x5c\xf7\x97\x35\xfa\xec\x59\xe8\x96\xa0\x00\x00\x00\x00"
"\x76\xff\xff\xff\x50\x71\xa2\xb1\xa3\x64\x82\x5c\xfd\x23\xea\x3b"
"\xb0\x19\x12\xd4\x00\x00\x00\x00";
static const krb5_keyblock member_keyblock2 = {
ETYPE_DES_CBC_MD5,
{ 8, "\x9e\x37\x83\x25\x4a\x7f\xf2\xf8" }
};
static time_t authtime2 = 1225304188;
static const char *user2 = "openmsp";
int
main(int argc, char **argv)
{
krb5_error_code ret;
krb5_context context;
krb5_pac pac;
krb5_data data;
krb5_principal p, p2;
ret = krb5_init_context(&context);
if (ret)
errx(1, "krb5_init_contex");
krb5_enctype_enable(context, ETYPE_DES_CBC_MD5);
ret = krb5_parse_name_flags(context, user,
KRB5_PRINCIPAL_PARSE_NO_REALM, &p);
if (ret)
krb5_err(context, 1, ret, "krb5_parse_name");
ret = krb5_pac_parse(context, saved_pac, sizeof(saved_pac), &pac);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_parse");
ret = krb5_pac_verify(context, pac, authtime, p,
&member_keyblock, &kdc_keyblock);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_verify");
ret = _krb5_pac_sign(context, pac, authtime, p,
&member_keyblock, &kdc_keyblock, 0, &data);
if (ret)
krb5_err(context, 1, ret, "_krb5_pac_sign");
krb5_pac_free(context, pac);
ret = krb5_pac_parse(context, data.data, data.length, &pac);
krb5_data_free(&data);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_parse 2");
ret = krb5_pac_verify(context, pac, authtime, p,
&member_keyblock, &kdc_keyblock);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_verify 2");
/* make a copy and try to reproduce it */
{
uint32_t *list;
size_t len, i;
krb5_pac pac2;
ret = krb5_pac_init(context, &pac2);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_init");
/* our two user buffer plus the three "system" buffers */
ret = krb5_pac_get_types(context, pac, &len, &list);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_get_types");
for (i = 0; i < len; i++) {
/* skip server_cksum, privsvr_cksum, and logon_name */
if (list[i] == 6 || list[i] == 7 || list[i] == 10)
continue;
ret = krb5_pac_get_buffer(context, pac, list[i], &data);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_get_buffer");
if (list[i] == 1) {
if (type_1_length != data.length)
krb5_errx(context, 1, "type 1 have wrong length: %lu",
(unsigned long)data.length);
} else
krb5_errx(context, 1, "unknown type %lu",
(unsigned long)list[i]);
ret = krb5_pac_add_buffer(context, pac2, list[i], &data);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_add_buffer");
krb5_data_free(&data);
}
free(list);
ret = _krb5_pac_sign(context, pac2, authtime, p,
&member_keyblock, &kdc_keyblock, 0, &data);
if (ret)
krb5_err(context, 1, ret, "_krb5_pac_sign 4");
krb5_pac_free(context, pac2);
ret = krb5_pac_parse(context, data.data, data.length, &pac2);
krb5_data_free(&data);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_parse 4");
ret = krb5_pac_verify(context, pac2, authtime, p,
&member_keyblock, &kdc_keyblock);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_verify 4");
krb5_pac_free(context, pac2);
}
krb5_pac_free(context, pac);
/*
* check pac from Christian
*/
ret = krb5_parse_name_flags(context, user2,
KRB5_PRINCIPAL_PARSE_NO_REALM, &p2);
if (ret)
krb5_err(context, 1, ret, "krb5_parse_name");
ret = krb5_pac_parse(context, saved_pac2, sizeof(saved_pac2) -1, &pac);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_parse");
ret = krb5_pac_verify(context, pac, authtime2, p2,
&member_keyblock2, NULL);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_verify c1");
krb5_pac_free(context, pac);
krb5_free_principal(context, p2);
/*
* Test empty free
*/
ret = krb5_pac_init(context, &pac);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_init");
krb5_pac_free(context, pac);
/*
* Test add remove buffer
*/
ret = krb5_pac_init(context, &pac);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_init");
{
const krb5_data cdata = { 2, "\x00\x01" } ;
ret = krb5_pac_add_buffer(context, pac, 1, &cdata);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_add_buffer");
}
{
ret = krb5_pac_get_buffer(context, pac, 1, &data);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_get_buffer");
if (data.length != 2 || memcmp(data.data, "\x00\x01", 2) != 0)
krb5_errx(context, 1, "krb5_pac_get_buffer data not the same");
krb5_data_free(&data);
}
{
const krb5_data cdata = { 2, "\x02\x00" } ;
ret = krb5_pac_add_buffer(context, pac, 2, &cdata);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_add_buffer");
}
{
ret = krb5_pac_get_buffer(context, pac, 1, &data);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_get_buffer");
if (data.length != 2 || memcmp(data.data, "\x00\x01", 2) != 0)
krb5_errx(context, 1, "krb5_pac_get_buffer data not the same");
krb5_data_free(&data);
/* */
ret = krb5_pac_get_buffer(context, pac, 2, &data);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_get_buffer");
if (data.length != 2 || memcmp(data.data, "\x02\x00", 2) != 0)
krb5_errx(context, 1, "krb5_pac_get_buffer data not the same");
krb5_data_free(&data);
}
ret = _krb5_pac_sign(context, pac, authtime, p,
&member_keyblock, &kdc_keyblock, 0, &data);
if (ret)
krb5_err(context, 1, ret, "_krb5_pac_sign");
krb5_pac_free(context, pac);
ret = krb5_pac_parse(context, data.data, data.length, &pac);
krb5_data_free(&data);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_parse 3");
ret = krb5_pac_verify(context, pac, authtime, p,
&member_keyblock, &kdc_keyblock);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_verify 3");
{
uint32_t *list;
size_t len;
/* our two user buffer plus the three "system" buffers */
ret = krb5_pac_get_types(context, pac, &len, &list);
if (ret)
krb5_err(context, 1, ret, "krb5_pac_get_types");
if (len != 5)
krb5_errx(context, 1, "list wrong length");
free(list);
}
krb5_pac_free(context, pac);
krb5_free_principal(context, p);
krb5_free_context(context);
return 0;
}
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