/*
 * Copyright (c) 1997, 1998 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. All advertising materials mentioning features or use of this software 
 *    must display the following acknowledgement: 
 *      This product includes software developed by Kungliga Tekniska 
 *      Högskolan and its contributors. 
 *
 * 4. 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 "ktutil_locl.h"

RCSID("$Id$");

static int
kt_list(int argc, char **argv)
{
    krb5_error_code ret;
    krb5_kt_cursor cursor;
    krb5_keytab_entry entry;

    ret = krb5_kt_start_seq_get(context, keytab, &cursor);
    if(ret){
	krb5_warn(context, ret, "krb5_kt_start_seq_get");
	return 1;
    }
    printf("%s", "Version");
    printf("  ");
    printf("%-6s", "Type");
    printf("  ");
    printf("%s", "Principal");
    printf("\n");
    while((ret = krb5_kt_next_entry(context, keytab, &entry, &cursor)) == 0){
	char *p;
	printf("   %3d ", entry.vno);
	printf("  ");
	krb5_keytype_to_string(context, entry.keyblock.keytype, &p);
	printf("%-6s", p);
	free(p);
	printf("  ");
	krb5_unparse_name(context, entry.principal, &p);
	printf("%s ", p);
	free(p);
	printf("\n");
	krb5_kt_free_entry(context, &entry);
    }
    ret = krb5_kt_end_seq_get(context, keytab, &cursor);
    return 0;
}

static int
kt_remove(int argc, char **argv)
{
    krb5_error_code ret;
    krb5_keytab_entry entry;
    char *principal_string = NULL;
    krb5_principal principal;
    int kvno = 0;
    char *keytype_string = NULL;
    krb5_keytype keytype = 0;
    int help_flag = 0;
    struct getargs args[] = {
	{ "principal", 'p', arg_string, NULL, "principal to remove" },
	{ "kvno", 'V', arg_integer, NULL, "key version to remove" },
	{ "keytype", 't', arg_string, NULL, "key type to remove" },
	{ "help", 'h', arg_flag, NULL }
    };
    int num_args = sizeof(args) / sizeof(args[0]);
    int optind = 0;
    int i = 0;
    args[i++].value = &principal_string;
    args[i++].value = &kvno;
    args[i++].value = &keytype_string;
    args[i++].value = &help_flag;
    if(getarg(args, num_args, argc, argv, &optind)) {
	arg_printusage(args, num_args, "");
	return 0;
    }
    if(help_flag) {
	arg_printusage(args, num_args, "");
	return 0;
    }
    if(principal_string) {
	ret = krb5_parse_name(context, principal_string, &principal);
	if(ret) {
	    krb5_warn(context, ret, "%s", principal_string);
	    return 0;
	}
    }
    if(keytype_string) {
	ret = krb5_string_to_keytype(context, keytype_string, &keytype);
	if(ret) {
	    int t;
	    if(sscanf(keytype_string, "%d", &t) == 1)
		keytype = t;
	    else {
		krb5_warn(context, ret, "%s", keytype_string);
		if(principal)
		    krb5_free_principal(context, principal);
		return 0;
	    }
	}
    }
    entry.principal = principal;
    entry.keyblock.keytype = keytype;
    entry.vno = kvno;
    ret = krb5_kt_remove_entry(context, keytab, &entry);
    if(ret)
	krb5_warn(context, ret, "remove");
    if(principal)
	krb5_free_principal(context, principal);
    return 0;
}

static int
kt_add(int argc, char **argv)
{
    krb5_error_code ret;
    krb5_keytab_entry entry;
    char buf[128];
    char *principal_string = NULL;
    int kvno = -1;
    char *keytype_string = NULL;
    krb5_keytype keytype;
    char *password_string = NULL;
    int random_flag = 0;
    int help_flag = 0;
    struct getargs args[] = {
	{ "principal", 'p', arg_string, NULL, "principal of key", "principal"},
	{ "kvno", 'V', arg_integer, NULL, "key version of key" },
	{ "keytype", 't', arg_string, NULL, "key type of key" },
	{ "password", 'w', arg_string, NULL, "password for key"},
	{ "random",  'r', arg_flag, NULL, "generate random key" },
	{ "help", 'h', arg_flag, NULL }
    };
    int num_args = sizeof(args) / sizeof(args[0]);
    int optind = 0;
    int i = 0;
    args[i++].value = &principal_string;
    args[i++].value = &kvno;
    args[i++].value = &keytype_string;
    args[i++].value = &password_string;
    args[i++].value = &random_flag;
    args[i++].value = &help_flag;

    if(getarg(args, num_args, argc, argv, &optind)) {
	arg_printusage(args, num_args, "");
	return 0;
    }
    if(help_flag) {
	arg_printusage(args, num_args, "");
	return 0;
    }
    if(principal_string == NULL) {
	printf("Principal: ");
	fgets(buf, sizeof(buf), stdin);
	buf[strcspn(buf, "\r\n")] = '\0';
	principal_string = buf;
    }
    ret = krb5_parse_name(context, principal_string, &entry.principal);
    if(ret) {
	krb5_warn(context, ret, "%s", principal_string);
	return 0;
    }
    if(keytype_string == NULL) {
	printf("Keytype: ");
	fgets(buf, sizeof(buf), stdin);
	buf[strcspn(buf, "\r\n")] = '\0';
	keytype_string = buf;
    }
    ret = krb5_string_to_keytype(context, keytype_string, &keytype);
    if(ret) {
	int t;
	if(sscanf(keytype_string, "%d", &t) == 1)
	    keytype = t;
	else {
	    krb5_warn(context, ret, "%s", keytype_string);
	    if(entry.principal)
		krb5_free_principal(context, entry.principal);
	    return 0;
	}
    }
    if(kvno == -1) {
	printf("Key version: ");
	fgets(buf, sizeof(buf), stdin);
	buf[strcspn(buf, "\r\n")] = '\0';
	kvno = atoi(buf);
    }
    if(password_string == NULL && random_flag == 0) {
	des_read_pw_string(buf, sizeof(buf), "Password: ", 1);
	password_string = buf;
    }
    if(password_string) {
	krb5_data salt;
	krb5_get_salt(entry.principal, &salt);
	krb5_string_to_key(password_string, &salt, keytype, &entry.keyblock);
	krb5_data_free(&salt);
    } else {
	krb5_generate_random_keyblock(context, keytype, &entry.keyblock);
    }
    entry.vno = kvno;
    ret = krb5_kt_add_entry(context, keytab, &entry);
    if(ret)
	krb5_warn(context, ret, "add");
    krb5_kt_free_entry(context, &entry);
    return 0;
}

static int help(int argc, char **argv);

static SL_cmd cmds[] = {
    { "list",		kt_list,	"list",		"" },
    { "srvconvert",	srvconv,	"srvconvert [flags]",	"" },
    { "srv2keytab" },
    { "add", 		kt_add,		"add", 		"" },
    { "remove", 	kt_remove,	"remove", 	"" },
    { "help",		help,		"help",			"" },
    { NULL, 	NULL,		NULL, 			NULL }
};

static int help_flag;
static int version_flag;
static char *keytab_string; 

static struct getargs args[] = {
    { 
	"version",
	0,
	arg_flag,
	&version_flag,
	NULL,
	NULL 
    },
    { 
	"help",	    
	'h',   
	arg_flag, 
	&help_flag, 
	NULL, 
	NULL
    },
    { 
	"keytab",	    
	'k',   
	arg_string, 
	&keytab_string, 
	"keytab", 
	"keytab to operate on" 
    },
};

static int num_args = sizeof(args) / sizeof(args[0]);

krb5_context context;
krb5_keytab keytab;

static int
help(int argc, char **argv)
{
    sl_help(cmds, argc, argv);
    return 0;
}

static void
usage(int status)
{
    arg_printusage(args, num_args, "command");
    exit(status);
}

int
main(int argc, char **argv)
{
    int optind = 0;
    krb5_error_code ret;
    set_progname(argv[0]);
    krb5_init_context(&context);
    if(getarg(args, num_args, argc, argv, &optind))
	usage(1);
    if(help_flag)
	usage(0);
    if(version_flag)
	krb5_errx(context, 0, "%s", heimdal_version);
    argc -= optind;
    argv += optind;
    if(argc == 0)
	usage(1);
    if(keytab_string) {
	ret = krb5_kt_resolve(context, keytab_string, &keytab);
    } else {
	ret = krb5_kt_default(context, &keytab);
    }
    if(ret)
	krb5_err(context, 1, ret, "resolving keytab");
    ret = sl_command(cmds, argc, argv);
    krb5_kt_close(context, keytab);
    return ret;
}