/*
 * 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, &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, &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, &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;
}