kssl.c

/* ssl/kssl.c -*- mode: C; c-file-style: "eay" -*- */
/* Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL 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).
 *
 */


/*  ssl/kssl.c  --  Routines to support (& debug) Kerberos5 auth for openssl
**
**  19990701	VRS 	Started.
**  200011??	Jeffrey Altman, Richard Levitte
**          		Generalized for Heimdal, Newer MIT, & Win32.
**          		Integrated into main OpenSSL 0.9.7 snapshots.
**  20010413	Simon Wilkinson, VRS
**          		Real RFC2712 KerberosWrapper replaces AP_REQ.
*/

#include <openssl/opensslconf.h>

#include <string.h>

#define KRB5_PRIVATE	1

#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/krb5_asn.h>
#include "kssl_lcl.h"

#ifndef OPENSSL_NO_KRB5

#ifndef ENOMEM
#define ENOMEM KRB5KRB_ERR_GENERIC
#endif

/* 
 * When OpenSSL is built on Windows, we do not want to require that
 * the Kerberos DLLs be available in order for the OpenSSL DLLs to
 * work.  Therefore, all Kerberos routines are loaded at run time
 * and we do not link to a .LIB file.
 */

#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
/* 
 * The purpose of the following pre-processor statements is to provide
 * compatibility with different releases of MIT Kerberos for Windows.
 * All versions up to 1.2 used macros.  But macros do not allow for
 * a binary compatible interface for DLLs.  Therefore, all macros are
 * being replaced by function calls.  The following code will allow
 * an OpenSSL DLL built on Windows to work whether or not the macro
 * or function form of the routines are utilized.
 */
#ifdef  krb5_cc_get_principal
#define NO_DEF_KRB5_CCACHE
#undef  krb5_cc_get_principal
#endif
#define krb5_cc_get_principal    kssl_krb5_cc_get_principal

#define krb5_free_data_contents  kssl_krb5_free_data_contents   
#define krb5_free_context        kssl_krb5_free_context         
#define krb5_auth_con_free       kssl_krb5_auth_con_free        
#define krb5_free_principal      kssl_krb5_free_principal       
#define krb5_mk_req_extended     kssl_krb5_mk_req_extended      
#define krb5_get_credentials     kssl_krb5_get_credentials      
#define krb5_cc_default          kssl_krb5_cc_default           
#define krb5_sname_to_principal  kssl_krb5_sname_to_principal   
#define krb5_init_context        kssl_krb5_init_context         
#define krb5_free_ticket         kssl_krb5_free_ticket          
#define krb5_rd_req              kssl_krb5_rd_req               
#define krb5_kt_default          kssl_krb5_kt_default           
#define krb5_kt_resolve          kssl_krb5_kt_resolve           
/* macros in mit 1.2.2 and earlier; functions in mit 1.2.3 and greater */
#ifndef krb5_kt_close
#define krb5_kt_close            kssl_krb5_kt_close
#endif /* krb5_kt_close */
#ifndef krb5_kt_get_entry
#define krb5_kt_get_entry        kssl_krb5_kt_get_entry
#endif /* krb5_kt_get_entry */
#define krb5_auth_con_init       kssl_krb5_auth_con_init        

#define krb5_principal_compare   kssl_krb5_principal_compare
#define krb5_decrypt_tkt_part    kssl_krb5_decrypt_tkt_part
#define krb5_timeofday           kssl_krb5_timeofday
#define krb5_rc_default          kssl_krb5_rc_default

#ifdef krb5_rc_initialize
#undef krb5_rc_initialize
#endif
#define krb5_rc_initialize   kssl_krb5_rc_initialize

#ifdef krb5_rc_get_lifespan
#undef krb5_rc_get_lifespan
#endif
#define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan

#ifdef krb5_rc_destroy
#undef krb5_rc_destroy
#endif
#define krb5_rc_destroy      kssl_krb5_rc_destroy

#define valid_cksumtype      kssl_valid_cksumtype
#define krb5_checksum_size   kssl_krb5_checksum_size
#define krb5_kt_free_entry   kssl_krb5_kt_free_entry
#define krb5_auth_con_setrcache  kssl_krb5_auth_con_setrcache
#define krb5_auth_con_getrcache  kssl_krb5_auth_con_getrcache
#define krb5_get_server_rcache   kssl_krb5_get_server_rcache

/* Prototypes for built in stubs */
void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
void kssl_krb5_free_principal(krb5_context, krb5_principal );
krb5_error_code kssl_krb5_kt_resolve(krb5_context,
                                     krb5_const char *,
                                     krb5_keytab *);
krb5_error_code kssl_krb5_kt_default(krb5_context,
                                     krb5_keytab *);
krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *);
krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *, 
                                 krb5_const krb5_data *,
                                 krb5_const_principal, krb5_keytab, 
                                 krb5_flags *,krb5_ticket **);

krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
                                         krb5_const_principal);
krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
                                          krb5_auth_context  *,
                                          krb5_const krb5_flags,
                                          krb5_data  *,
                                          krb5_creds  *,
                                          krb5_data  * );
krb5_error_code kssl_krb5_init_context(krb5_context *);
void kssl_krb5_free_context(krb5_context);
krb5_error_code kssl_krb5_cc_default(krb5_context,krb5_ccache  *);
krb5_error_code kssl_krb5_sname_to_principal(krb5_context,
                                             krb5_const char  *,
                                             krb5_const char  *,
                                             krb5_int32,
                                             krb5_principal  *);
krb5_error_code kssl_krb5_get_credentials(krb5_context,
                                          krb5_const krb5_flags,
                                          krb5_ccache,
                                          krb5_creds  *,
                                          krb5_creds  *  *);
krb5_error_code kssl_krb5_auth_con_init(krb5_context,
                                        krb5_auth_context  *);
krb5_error_code kssl_krb5_cc_get_principal(krb5_context context, 
                                           krb5_ccache cache,
                                           krb5_principal *principal);
krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
size_t kssl_krb5_checksum_size(krb5_context context,krb5_cksumtype ctype);
krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype);
krb5_error_code krb5_kt_free_entry(krb5_context,krb5_keytab_entry FAR * );
krb5_error_code kssl_krb5_auth_con_setrcache(krb5_context, 
                                             krb5_auth_context, 
                                             krb5_rcache);
krb5_error_code kssl_krb5_get_server_rcache(krb5_context, 
                                            krb5_const krb5_data *,
                                            krb5_rcache *);
krb5_error_code kssl_krb5_auth_con_getrcache(krb5_context, 
                                             krb5_auth_context,
                                             krb5_rcache *);

/* Function pointers (almost all Kerberos functions are _stdcall) */
static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
	=NULL;
static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )
	=NULL;
static krb5_error_code(_stdcall *p_krb5_kt_resolve)
			(krb5_context, krb5_const char *, krb5_keytab *)=NULL;
static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context,
                                                     krb5_keytab *)=NULL;
static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context, 
                                                      krb5_ticket *)=NULL;
static krb5_error_code (_stdcall *p_krb5_rd_req)(krb5_context, 
                                                 krb5_auth_context *, 
                                                 krb5_const krb5_data *,
                                                 krb5_const_principal, 
                                                 krb5_keytab, krb5_flags *,
                                                 krb5_ticket **)=NULL;
static krb5_error_code (_stdcall *p_krb5_mk_req_extended)
			(krb5_context, krb5_auth_context *,
			 krb5_const krb5_flags, krb5_data *, krb5_creds *,
			 krb5_data * )=NULL;
static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL;
static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL;
static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context,
                                                     krb5_ccache  *)=NULL;
static krb5_error_code (_stdcall *p_krb5_sname_to_principal)
			(krb5_context, krb5_const char *, krb5_const char *,
			 krb5_int32, krb5_principal *)=NULL;
static krb5_error_code (_stdcall *p_krb5_get_credentials)
			(krb5_context, krb5_const krb5_flags, krb5_ccache,
			 krb5_creds *, krb5_creds **)=NULL;
static krb5_error_code (_stdcall *p_krb5_auth_con_init)
			(krb5_context, krb5_auth_context *)=NULL;
static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
			(krb5_context context, krb5_ccache cache,
			 krb5_principal *principal)=NULL;
static krb5_error_code (_stdcall *p_krb5_auth_con_free)
			(krb5_context, krb5_auth_context)=NULL;
static krb5_error_code (_stdcall *p_krb5_decrypt_tkt_part)
                        (krb5_context, krb5_const krb5_keyblock *,
                                           krb5_ticket *)=NULL;
static krb5_error_code (_stdcall *p_krb5_timeofday)
                        (krb5_context context, krb5_int32 *timeret)=NULL;
static krb5_error_code (_stdcall *p_krb5_rc_default)
                        (krb5_context context, krb5_rcache *rc)=NULL;
static krb5_error_code (_stdcall *p_krb5_rc_initialize)
                        (krb5_context context, krb5_rcache rc,
                                     krb5_deltat lifespan)=NULL;
static krb5_error_code (_stdcall *p_krb5_rc_get_lifespan)
                        (krb5_context context, krb5_rcache rc,
                                       krb5_deltat *lifespan)=NULL;
static krb5_error_code (_stdcall *p_krb5_rc_destroy)
                        (krb5_context context, krb5_rcache rc)=NULL;
static krb5_boolean (_stdcall *p_krb5_principal_compare)
                     (krb5_context, krb5_const_principal, krb5_const_principal)=NULL;
static size_t (_stdcall *p_krb5_checksum_size)(krb5_context context,krb5_cksumtype ctype)=NULL;
static krb5_boolean (_stdcall *p_valid_cksumtype)(krb5_cksumtype ctype)=NULL;
static krb5_error_code (_stdcall *p_krb5_kt_free_entry)
                        (krb5_context,krb5_keytab_entry * )=NULL;
static krb5_error_code (_stdcall * p_krb5_auth_con_setrcache)(krb5_context, 
                                                               krb5_auth_context, 
                                                               krb5_rcache)=NULL;
static krb5_error_code (_stdcall * p_krb5_get_server_rcache)(krb5_context, 
                                                              krb5_const krb5_data *, 
                                                              krb5_rcache *)=NULL;
static krb5_error_code (* p_krb5_auth_con_getrcache)(krb5_context, 
                                                      krb5_auth_context,
                                                      krb5_rcache *)=NULL;
static krb5_error_code (_stdcall * p_krb5_kt_close)(krb5_context context, 
                                                    krb5_keytab keytab)=NULL;
static krb5_error_code (_stdcall * p_krb5_kt_get_entry)(krb5_context context, 
                                                        krb5_keytab keytab,
                       krb5_const_principal principal, krb5_kvno vno,
                       krb5_enctype enctype, krb5_keytab_entry *entry)=NULL;
static int krb5_loaded = 0;     /* only attempt to initialize func ptrs once */

/* Function to Load the Kerberos 5 DLL and initialize function pointers */
void
load_krb5_dll(void)
	{
	HANDLE hKRB5_32;
    
	krb5_loaded++;
	hKRB5_32 = LoadLibrary(TEXT("KRB5_32"));
	if (!hKRB5_32)
		return;

	(FARPROC) p_krb5_free_data_contents =
		GetProcAddress( hKRB5_32, "krb5_free_data_contents" );
	(FARPROC) p_krb5_free_context =
		GetProcAddress( hKRB5_32, "krb5_free_context" );
	(FARPROC) p_krb5_auth_con_free =
		GetProcAddress( hKRB5_32, "krb5_auth_con_free" );
	(FARPROC) p_krb5_free_principal =
		GetProcAddress( hKRB5_32, "krb5_free_principal" );
	(FARPROC) p_krb5_mk_req_extended =
		GetProcAddress( hKRB5_32, "krb5_mk_req_extended" );
	(FARPROC) p_krb5_get_credentials =
		GetProcAddress( hKRB5_32, "krb5_get_credentials" );
	(FARPROC) p_krb5_cc_get_principal =
		GetProcAddress( hKRB5_32, "krb5_cc_get_principal" );
	(FARPROC) p_krb5_cc_default =
		GetProcAddress( hKRB5_32, "krb5_cc_default" );
	(FARPROC) p_krb5_sname_to_principal =
		GetProcAddress( hKRB5_32, "krb5_sname_to_principal" );
	(FARPROC) p_krb5_init_context =
		GetProcAddress( hKRB5_32, "krb5_init_context" );
	(FARPROC) p_krb5_free_ticket =
		GetProcAddress( hKRB5_32, "krb5_free_ticket" );
	(FARPROC) p_krb5_rd_req =
		GetProcAddress( hKRB5_32, "krb5_rd_req" );
	(FARPROC) p_krb5_principal_compare =
		GetProcAddress( hKRB5_32, "krb5_principal_compare" );
	(FARPROC) p_krb5_decrypt_tkt_part =
		GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" );
	(FARPROC) p_krb5_timeofday =
		GetProcAddress( hKRB5_32, "krb5_timeofday" );
	(FARPROC) p_krb5_rc_default =
		GetProcAddress( hKRB5_32, "krb5_rc_default" );
	(FARPROC) p_krb5_rc_initialize =
		GetProcAddress( hKRB5_32, "krb5_rc_initialize" );
	(FARPROC) p_krb5_rc_get_lifespan =
		GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" );
	(FARPROC) p_krb5_rc_destroy =
		GetProcAddress( hKRB5_32, "krb5_rc_destroy" );
	(FARPROC) p_krb5_kt_default =
		GetProcAddress( hKRB5_32, "krb5_kt_default" );
	(FARPROC) p_krb5_kt_resolve =
		GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
	(FARPROC) p_krb5_auth_con_init =
		GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
        (FARPROC) p_valid_cksumtype =
                GetProcAddress( hKRB5_32, "valid_cksumtype" );
        (FARPROC) p_krb5_checksum_size =
                GetProcAddress( hKRB5_32, "krb5_checksum_size" );
        (FARPROC) p_krb5_kt_free_entry =
                GetProcAddress( hKRB5_32, "krb5_kt_free_entry" );
        (FARPROC) p_krb5_auth_con_setrcache =
                GetProcAddress( hKRB5_32, "krb5_auth_con_setrcache" );
        (FARPROC) p_krb5_get_server_rcache =
                GetProcAddress( hKRB5_32, "krb5_get_server_rcache" );
        (FARPROC) p_krb5_auth_con_getrcache =
                GetProcAddress( hKRB5_32, "krb5_auth_con_getrcache" );
        (FARPROC) p_krb5_kt_close =
                GetProcAddress( hKRB5_32, "krb5_kt_close" );
        (FARPROC) p_krb5_kt_get_entry =
                GetProcAddress( hKRB5_32, "krb5_kt_get_entry" );
	}

/* Stubs for each function to be dynamicly loaded */
void
kssl_krb5_free_data_contents(krb5_context CO, krb5_data  * data)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_free_data_contents )
		p_krb5_free_data_contents(CO,data);
	}

krb5_error_code
kssl_krb5_mk_req_extended (krb5_context CO,
                          krb5_auth_context  * pACO,
                          krb5_const krb5_flags F,
                          krb5_data  * pD1,
                          krb5_creds  * pC,
                          krb5_data  * pD2)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_mk_req_extended )
		return(p_krb5_mk_req_extended(CO,pACO,F,pD1,pC,pD2));
	else
		return KRB5KRB_ERR_GENERIC;
	}
krb5_error_code
kssl_krb5_auth_con_init(krb5_context CO,
                       krb5_auth_context  * pACO)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_auth_con_init )
		return(p_krb5_auth_con_init(CO,pACO));
	else
		return KRB5KRB_ERR_GENERIC;
	}
krb5_error_code
kssl_krb5_auth_con_free (krb5_context CO,
                        krb5_auth_context ACO)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_auth_con_free )
		return(p_krb5_auth_con_free(CO,ACO));
	else
		return KRB5KRB_ERR_GENERIC;
	}
krb5_error_code
kssl_krb5_get_credentials(krb5_context CO,
                         krb5_const krb5_flags F,
                         krb5_ccache CC,
                         krb5_creds  * pCR,
                         krb5_creds  ** ppCR)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_get_credentials )
		return(p_krb5_get_credentials(CO,F,CC,pCR,ppCR));
	else
		return KRB5KRB_ERR_GENERIC;
	}
krb5_error_code
kssl_krb5_sname_to_principal(krb5_context CO,
                            krb5_const char  * pC1,
                            krb5_const char  * pC2,
                            krb5_int32 I,
                            krb5_principal  * pPR)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_sname_to_principal )
		return(p_krb5_sname_to_principal(CO,pC1,pC2,I,pPR));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
kssl_krb5_cc_default(krb5_context CO,
                    krb5_ccache  * pCC)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_cc_default )
		return(p_krb5_cc_default(CO,pCC));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
kssl_krb5_init_context(krb5_context * pCO)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_init_context )
		return(p_krb5_init_context(pCO));
	else
		return KRB5KRB_ERR_GENERIC;
	}

void
kssl_krb5_free_context(krb5_context CO)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_free_context )
		p_krb5_free_context(CO);
	}

void
kssl_krb5_free_principal(krb5_context c, krb5_principal p)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_free_principal )
		p_krb5_free_principal(c,p);
	}

krb5_error_code
kssl_krb5_kt_resolve(krb5_context con,
                    krb5_const char * sz,
                    krb5_keytab * kt)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_kt_resolve )
		return(p_krb5_kt_resolve(con,sz,kt));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
kssl_krb5_kt_default(krb5_context con,
                    krb5_keytab * kt)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_kt_default )
		return(p_krb5_kt_default(con,kt));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
kssl_krb5_free_ticket(krb5_context con,
                     krb5_ticket * kt)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_free_ticket )
		return(p_krb5_free_ticket(con,kt));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
kssl_krb5_rd_req(krb5_context con, krb5_auth_context * pacon,
                krb5_const krb5_data * data,
                krb5_const_principal princ, krb5_keytab keytab,
                krb5_flags * flags, krb5_ticket ** pptkt)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_rd_req )
		return(p_krb5_rd_req(con,pacon,data,princ,keytab,flags,pptkt));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_boolean
krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
                krb5_const_principal princ2)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_principal_compare )
		return(p_krb5_principal_compare(con,princ1,princ2));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
                krb5_ticket *ticket)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_decrypt_tkt_part )
		return(p_krb5_decrypt_tkt_part(con,keys,ticket));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
krb5_timeofday(krb5_context con, krb5_int32 *timeret)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_timeofday )
		return(p_krb5_timeofday(con,timeret));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
krb5_rc_default(krb5_context con, krb5_rcache *rc)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_rc_default )
		return(p_krb5_rc_default(con,rc));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_rc_initialize )
		return(p_krb5_rc_initialize(con, rc, lifespan));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_rc_get_lifespan )
		return(p_krb5_rc_get_lifespan(con, rc, lifespanp));
	else
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
krb5_rc_destroy(krb5_context con, krb5_rcache rc)
	{
	if (!krb5_loaded)
		load_krb5_dll();

	if ( p_krb5_rc_destroy )
		return(p_krb5_rc_destroy(con, rc));
	else
		return KRB5KRB_ERR_GENERIC;
	}

size_t 
krb5_checksum_size(krb5_context context,krb5_cksumtype ctype)
        {
        if (!krb5_loaded)
                load_krb5_dll();

        if ( p_krb5_checksum_size )
                return(p_krb5_checksum_size(context, ctype));
        else
                return KRB5KRB_ERR_GENERIC;
        }

krb5_boolean 
valid_cksumtype(krb5_cksumtype ctype)
        {
        if (!krb5_loaded)
                load_krb5_dll();

        if ( p_valid_cksumtype )
                return(p_valid_cksumtype(ctype));
        else
                return KRB5KRB_ERR_GENERIC;
        }

krb5_error_code 
krb5_kt_free_entry(krb5_context con,krb5_keytab_entry * entry)
        {
        if (!krb5_loaded)
                load_krb5_dll();

        if ( p_krb5_kt_free_entry )
                return(p_krb5_kt_free_entry(con,entry));
        else
                return KRB5KRB_ERR_GENERIC;
        }
                 
/* Structure definitions  */
#ifndef NO_DEF_KRB5_CCACHE
#ifndef krb5_x
#define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1))
#define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0))
#endif 

typedef	krb5_pointer	krb5_cc_cursor;	/* cursor for sequential lookup */

typedef struct _krb5_ccache
	{
	krb5_magic magic;
	struct _krb5_cc_ops FAR *ops;
	krb5_pointer data;
	} *krb5_ccache;

typedef struct _krb5_cc_ops
	{
	krb5_magic magic;
	char  *prefix;
	char  * (KRB5_CALLCONV *get_name)
		(krb5_context, krb5_ccache);
	krb5_error_code (KRB5_CALLCONV *resolve)
		(krb5_context, krb5_ccache  *, const char  *);
	krb5_error_code (KRB5_CALLCONV *gen_new)
		(krb5_context, krb5_ccache  *);
	krb5_error_code (KRB5_CALLCONV *init)
		(krb5_context, krb5_ccache, krb5_principal);
	krb5_error_code (KRB5_CALLCONV *destroy)
		(krb5_context, krb5_ccache);
	krb5_error_code (KRB5_CALLCONV *close)
		(krb5_context, krb5_ccache);
	krb5_error_code (KRB5_CALLCONV *store)
		(krb5_context, krb5_ccache, krb5_creds  *);
	krb5_error_code (KRB5_CALLCONV *retrieve)
		(krb5_context, krb5_ccache,
		krb5_flags, krb5_creds  *, krb5_creds  *);
	krb5_error_code (KRB5_CALLCONV *get_princ)
		(krb5_context, krb5_ccache, krb5_principal  *);
	krb5_error_code (KRB5_CALLCONV *get_first)
		(krb5_context, krb5_ccache, krb5_cc_cursor  *);
	krb5_error_code (KRB5_CALLCONV *get_next)
		(krb5_context, krb5_ccache,
		krb5_cc_cursor  *, krb5_creds  *);
	krb5_error_code (KRB5_CALLCONV *end_get)
		(krb5_context, krb5_ccache, krb5_cc_cursor  *);
	krb5_error_code (KRB5_CALLCONV *remove_cred)
		(krb5_context, krb5_ccache,
		krb5_flags, krb5_creds  *);
	krb5_error_code (KRB5_CALLCONV *set_flags)
		(krb5_context, krb5_ccache, krb5_flags);
	} krb5_cc_ops;
#endif /* NO_DEF_KRB5_CCACHE */

krb5_error_code 
kssl_krb5_cc_get_principal
    (krb5_context context, krb5_ccache cache,
      krb5_principal *principal)
	{
	if ( p_krb5_cc_get_principal )
		return(p_krb5_cc_get_principal(context,cache,principal));
	else
		return(krb5_x
			((cache)->ops->get_princ,(context, cache, principal)));
	}

krb5_error_code
kssl_krb5_auth_con_setrcache(krb5_context con, krb5_auth_context acon,
                             krb5_rcache rcache)
        {
        if ( p_krb5_auth_con_setrcache )
                 return(p_krb5_auth_con_setrcache(con,acon,rcache));
        else
                 return KRB5KRB_ERR_GENERIC;
        }

krb5_error_code
kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data * data,
                            krb5_rcache * rcache) 
        {
	if ( p_krb5_get_server_rcache )
		return(p_krb5_get_server_rcache(con,data,rcache));
	else
		return KRB5KRB_ERR_GENERIC;
        }

krb5_error_code
kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon,
                             krb5_rcache * prcache)
        {
	if ( p_krb5_auth_con_getrcache )
		return(p_krb5_auth_con_getrcache(con,acon, prcache));
	else
		return KRB5KRB_ERR_GENERIC;
	}
 
krb5_error_code
kssl_krb5_kt_close(krb5_context context, krb5_keytab keytab)
	{
	if ( p_krb5_kt_close )
		return(p_krb5_kt_close(context,keytab));
	else 
		return KRB5KRB_ERR_GENERIC;
	}

krb5_error_code
kssl_krb5_kt_get_entry(krb5_context context, krb5_keytab keytab,
                       krb5_const_principal principal, krb5_kvno vno,
                       krb5_enctype enctype, krb5_keytab_entry *entry)
	{
	if ( p_krb5_kt_get_entry )
		return(p_krb5_kt_get_entry(context,keytab,principal,vno,enctype,entry));
	else
		return KRB5KRB_ERR_GENERIC;
        }
#endif  /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */


/* memory allocation functions for non-temporary storage
 * (e.g. stuff that gets saved into the kssl context) */
static void* kssl_calloc(size_t nmemb, size_t size)
{
	void* p;
	
	p=OPENSSL_malloc(nmemb*size);
	if (p){
		memset(p, 0, nmemb*size);
	}
	return p;
}

#define kssl_malloc(size) OPENSSL_malloc((size))
#define kssl_realloc(ptr, size) OPENSSL_realloc(ptr, size)
#define kssl_free(ptr) OPENSSL_free((ptr))


char
*kstring(char *string)
        {
        static char	*null = "[NULL]";

	return ((string == NULL)? null: string);
        }

/*	Given KRB5 enctype (basically DES or 3DES),
**	return closest match openssl EVP_ encryption algorithm.
**	Return NULL for unknown or problematic (krb5_dk_encrypt) enctypes.
**	Assume ENCTYPE_*_RAW (krb5_raw_encrypt) are OK.
*/
const EVP_CIPHER *
kssl_map_enc(krb5_enctype enctype)
        {
	switch (enctype)
		{
	case ENCTYPE_DES_HMAC_SHA1:		/*    EVP_des_cbc();       */
	case ENCTYPE_DES_CBC_CRC:
	case ENCTYPE_DES_CBC_MD4:
	case ENCTYPE_DES_CBC_MD5:
	case ENCTYPE_DES_CBC_RAW:
				return EVP_des_cbc();
				break;
	case ENCTYPE_DES3_CBC_SHA1:		/*    EVP_des_ede3_cbc();  */
	case ENCTYPE_DES3_CBC_SHA:
	case ENCTYPE_DES3_CBC_RAW:
				return EVP_des_ede3_cbc();
				break;
	default:                return NULL;
				break;
		}
	}


/*	Return true:1 if p "looks like" the start of the real authenticator
**	described in kssl_skip_confound() below.  The ASN.1 pattern is
**	"62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and
**	xx and yy are possibly multi-byte length fields.
*/
static int 	kssl_test_confound(unsigned char *p)
	{
	int 	len = 2;
	int 	xx = 0, yy = 0;

	if (*p++ != 0x62)  return 0;
	if (*p > 0x82)  return 0;
	switch(*p)  {
		case 0x82:  p++;          xx = (*p++ << 8);  xx += *p++;  break;
		case 0x81:  p++;          xx =  *p++;  break;
		case 0x80:  return 0;
		default:    xx = *p++;  break;
		}
	if (*p++ != 0x30)  return 0;
	if (*p > 0x82)  return 0;
	switch(*p)  {
		case 0x82:  p++; len+=2;  yy = (*p++ << 8);  yy += *p++;  break;
		case 0x81:  p++; len++;   yy =  *p++;  break;
		case 0x80:  return 0;
		default:    yy = *p++;  break;
		}

	return (xx - len == yy)? 1: 0;
	}

/*	Allocate, fill, and return cksumlens array of checksum lengths.
**	This array holds just the unique elements from the krb5_cksumarray[].
**	array[n] == 0 signals end of data.
**
**      The krb5_cksumarray[] was an internal variable that has since been
**      replaced by a more general method for storing the data.  It should
**      not be used.  Instead we use real API calls and make a guess for 
**      what the highest assigned CKSUMTYPE_ constant is.  As of 1.2.2
**      it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3).  So we will use 0x0010.
*/
static size_t  *populate_cksumlens(void)
	{
	int 		i, j, n;
	static size_t 	*cklens = NULL;

#ifdef KRB5_MIT_OLD11
	n = krb5_max_cksum;
#else
	n = 0x0010;
#endif	/* KRB5_MIT_OLD11 */
 
#ifdef KRB5CHECKAUTH
	if (!cklens && !(cklens = (size_t *) calloc(sizeof(int),n+1)))  return NULL;

	for (i=0; i < n; i++)  {
		if (!valid_cksumtype(i))  continue;	/*  array has holes  */
		for (j=0; j < n; j++)  {
			if (cklens[j] == 0)  {
				cklens[j] = krb5_checksum_size(NULL,i);
				break;		/*  krb5 elem was new: add   */
				}
			if (cklens[j] == krb5_checksum_size(NULL,i))  {
				break;		/*  ignore duplicate elements */
				}
			}
		}
#endif	/* KRB5CHECKAUTH */

	return cklens;
	}

/*	Return pointer to start of real authenticator within authenticator, or
**	return NULL on error.
**	Decrypted authenticator looks like this:
**		[0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
**	This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
**	krb5_auth_con_getcksumtype() function advertised in its krb5.h.
*/
unsigned char	*kssl_skip_confound(krb5_enctype etype, unsigned char *a)
	{
	int 		i, conlen;
	size_t		cklen;
	static size_t 	*cksumlens = NULL;
	unsigned char	*test_auth;

	conlen = (etype)? 8: 0;

	if (!cksumlens  &&  !(cksumlens = populate_cksumlens()))  return NULL;
	for (i=0; (cklen = cksumlens[i]) != 0; i++)
		{
		test_auth = a + conlen + cklen;
		if (kssl_test_confound(test_auth))  return test_auth;
		}

	return NULL;
	}


/*	Set kssl_err error info when reason text is a simple string
**		kssl_err = struct { int reason; char text[KSSL_ERR_MAX+1]; }
*/
void
kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
        {
	if (kssl_err == NULL)  return;

	kssl_err->reason = reason;
	BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, "%s", text);
	return;
        }


/*	Display contents of krb5_data struct, for debugging
*/
void
print_krb5_data(char *label, krb5_data *kdata)
        {
	int i;

	printf("%s[%d] ", label, kdata->length);
	for (i=0; i < (int)kdata->length; i++)
                {
		if (0 &&  isprint((int) kdata->data[i]))
                        printf(	"%c ",  kdata->data[i]);
		else
                        printf(	"%02x ", (unsigned char) kdata->data[i]);
		}
	printf("\n");
        }


/*	Display contents of krb5_authdata struct, for debugging
*/
void
print_krb5_authdata(char *label, krb5_authdata **adata)
        {
	if (adata == NULL)
                {
		printf("%s, authdata==0\n", label);
		return;
		}
	printf("%s [%p]\n", label, (void *)adata);
#if 0
	{
        int 	i;
	printf("%s[at%d:%d] ", label, adata->ad_type, adata->length);
	for (i=0; i < adata->length; i++)
                {
                printf((isprint(adata->contents[i]))? "%c ": "%02x",
                        adata->contents[i]);
		}
	printf("\n");
	}
#endif
	}


/*	Display contents of krb5_keyblock struct, for debugging
*/
void
print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
        {
	int i;