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kssl.c
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kssl.c
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/* ssl/kssl.c -*- mode: C; c-file-style: "eay" -*- */
/* Written by Vern Staats <[email protected]> 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
*
* 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
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
/* 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>
#define _XOPEN_SOURCE 500 /* glibc2 needs this to declare strptime() */
#include <time.h>
#if 0 /* Experimental */
#undef _XOPEN_SOURCE /* To avoid clashes with anything else... */
#endif
#include <string.h>
#define KRB5_PRIVATE 1
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/krb5_asn.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 */
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.
*/
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.
*/
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, 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;
if (keyblk == NULL)
{
printf("%s, keyblk==0\n", label);
return;
}
#ifdef KRB5_HEIMDAL
printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype,
keyblk->keyvalue->length);
for (i=0; i < (int)keyblk->keyvalue->length; i++)
{
printf("%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]);
}
printf("\n");
#else