/* ssl/kssl.h -*- mode: C; c-file-style: "eay" -*- */

/* Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL project 2000.

 * project 2000.

 */

/* ====================================================================

 * Copyright (c) 2000 The OpenSSL Project.  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 acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED 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 OpenSSL PROJECT OR

 * ITS 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.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

/*

**	19990701	VRS 	Started.

*/

#ifndef	KSSL_H

#define	KSSL_H

#include <openssl/opensslconf.h>

#ifndef OPENSSL_NO_KRB5

#include <stdio.h>

#include <ctype.h>

#include <krb5.h>

#ifdef  __cplusplus

extern "C" {

#endif

/*

**	Depending on which KRB5 implementation used, some types from

**	the other may be missing.  Resolve that here and now

*/

#ifdef KRB5_HEIMDAL

typedef unsigned char krb5_octet;

#define FAR

#endif

/*	Uncomment this to debug kssl problems or

**	to trace usage of the Kerberos session key

**

**	#define		KSSL_DEBUG

*/

#ifndef	KRB5SVC

#define KRB5SVC	"host"

#endif

#ifndef	KRB5KEYTAB

#define KRB5KEYTAB	"/etc/krb5.keytab"

#endif

#ifndef KRB5SENDAUTH

#define KRB5SENDAUTH	1

#endif

#ifndef KRB5CHECKAUTH

#define KRB5CHECKAUTH	1

#endif

#ifndef KSSL_CLOCKSKEW

#define	KSSL_CLOCKSKEW	300;

#endif

#define	KSSL_ERR_MAX	255

typedef struct kssl_err_st  {

	int  reason;

	char text[KSSL_ERR_MAX+1];

	} KSSL_ERR;

/*	Context for passing

**		(1) Kerberos session key to SSL, and

**		(2)	Config data between application and SSL lib

*/

typedef struct kssl_ctx_st

        {

                                /*	used by:    disposition:            */

	char *service_name;	/*	C,S	    default ok (kssl)       */

	char *service_host;	/*	C	    input, REQUIRED         */

	char *client_princ;	/*	S	    output from krb5 ticket */

	char *keytab_file;	/*      S	    NULL (/etc/krb5.keytab) */

	char *cred_cache;	/*	C	    NULL (default)          */

	krb5_enctype enctype;

	int length;

	krb5_octet FAR *key;

	} KSSL_CTX;

#define	KSSL_CLIENT 	1

#define KSSL_SERVER 	2

#define	KSSL_SERVICE	3

#define	KSSL_KEYTAB 	4

#define KSSL_CTX_OK 	0

#define KSSL_CTX_ERR	1

#define KSSL_NOMEM	2

/* Public (for use by applications that use OpenSSL with Kerberos 5 support */

krb5_error_code kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text);

KSSL_CTX *kssl_ctx_new(void);

KSSL_CTX *kssl_ctx_free(KSSL_CTX *kssl_ctx);

void kssl_ctx_show(KSSL_CTX *kssl_ctx);

krb5_error_code kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,

        krb5_data *realm, krb5_data *entity);

krb5_error_code	kssl_cget_tkt(KSSL_CTX *kssl_ctx,  krb5_data **enc_tktp,

        krb5_data *authenp, KSSL_ERR *kssl_err);

krb5_error_code	kssl_sget_tkt(KSSL_CTX *kssl_ctx,  krb5_data *indata,

        krb5_ticket_times *ttimes, KSSL_ERR *kssl_err);

krb5_error_code kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session);

void	kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text);

void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data);

krb5_error_code  kssl_build_principal_2(krb5_context context,

			krb5_principal *princ, int rlen, const char *realm,

			int slen, const char *svc, int hlen, const char *host);

krb5_error_code  kssl_validate_times(krb5_timestamp atime,

					krb5_ticket_times *ttimes);

krb5_error_code  kssl_check_authent(KSSL_CTX *kssl_ctx, krb5_data *authentp,

			            krb5_timestamp *atimep, KSSL_ERR *kssl_err);

unsigned char	*kssl_skip_confound(krb5_enctype enctype, unsigned char *authn);

#ifdef  __cplusplus

}

#endif

#endif	/* OPENSSL_NO_KRB5	*/

#endif	/* KSSL_H 	*/