text: /* 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
  #else
  
  #ifndef FAR
  #define FAR
  #endif
  
  #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, int nentities);
  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);
  
  void SSL_set0_kssl_ctx(SSL *s, KSSL_CTX *kctx);
  KSSL_CTX * SSL_get0_kssl_ctx(SSL *s);
  char *kssl_ctx_get0_client_princ(KSSL_CTX *kctx);
  
  #ifdef  __cplusplus
  }
  #endif
  #endif	/* OPENSSL_NO_KRB5	*/
  #endif	/* KSSL_H 	*/
  