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kssl.c
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kssl.c
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/* ssl/kssl.c */
/*
* Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL project
* 2000.
*/
/* ====================================================================
* Copyright (c) 2000-2018 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 "o_time.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;
fprintf(stderr, "%s[%d] ", label, kdata->length);
for (i = 0; i < (int)kdata->length; i++) {
if (0 && isprint((int)kdata->data[i]))
fprintf(stderr, "%c ", kdata->data[i]);
else
fprintf(stderr, "%02x ", (unsigned char)kdata->data[i]);
}
fprintf(stderr, "\n");
}
/*
* Display contents of krb5_authdata struct, for debugging
*/
void print_krb5_authdata(char *label, krb5_authdata **adata)
{
if (adata == NULL) {
fprintf(stderr, "%s, authdata==0\n", label);
return;
}
fprintf(stderr, "%s [%p]\n", label, (void *)adata);
# if 0
{
int i;
fprintf(stderr, "%s[at%d:%d] ", label, adata->ad_type, adata->length);
for (i = 0; i < adata->length; i++) {
fprintf(stderr, (isprint(adata->contents[i])) ? "%c " : "%02x",
adata->contents[i]);
}
fprintf(stderr, "\n");
}
# endif
}
/*
* Display contents of krb5_keyblock struct, for debugging
*/
void print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
{
int i;
if (keyblk == NULL) {
fprintf(stderr, "%s, keyblk==0\n", label);
return;
}
# ifdef KRB5_HEIMDAL
fprintf(stderr, "%s\n\t[et%d:%d]: ", label, keyblk->keytype,
keyblk->keyvalue->length);
for (i = 0; i < (int)keyblk->keyvalue->length; i++) {
fprintf(stderr, "%02x",
(unsigned char *)(keyblk->keyvalue->contents)[i]);
}
fprintf(stderr, "\n");
# else
fprintf(stderr, "%s\n\t[et%d:%d]: ", label, keyblk->enctype,
keyblk->length);