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/*
* lib/krb5/krb/init_ctx.c
*
* Copyright 1994 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* krb5_init_contex()
*/
/*
* Copyright (C) 1998 by the FundsXpress, INC.
*
* All rights reserved.
*
* Export of this software from the United States of America may require
* a specific license from the United States Government. It is the
* responsibility of any person or organization contemplating export to
* obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of FundsXpress. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. FundsXpress makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "k5-int.h"
#include <ctype.h>
#include "brand.c"
#if (defined(_MSDOS) || defined(_WIN32))
extern krb5_error_code krb5_vercheck();
extern void krb5_win_ccdll_load(krb5_context context);
#endif
KRB5_DLLIMP krb5_error_code KRB5_CALLCONV
krb5_init_context(context)
krb5_context *context;
{
krb5_context ctx = 0;
krb5_error_code retval;
krb5_timestamp now;
krb5_data seed;
int tmp;
/* Initialize error tables */
krb5_init_ets(ctx);
#if (defined(_MSDOS) || defined(_WIN32))
krb5_win_ccdll_load(context); /* Load the krbcc32.dll if necessary */
/*
* krb5_vercheck() is defined in win_glue.c, and this is
* where we handle the timebomb and version server checks.
*/
retval = krb5_vercheck();
if (retval)
return retval;
#endif
*context = 0;
ctx = malloc(sizeof(struct _krb5_context));
if (!ctx)
return ENOMEM;
memset(ctx, 0, sizeof(struct _krb5_context));
ctx->magic = KV5M_CONTEXT;
/* Set the default encryption types, possible defined in krb5/conf */
if ((retval = krb5_set_default_in_tkt_ktypes(ctx, NULL)))
goto cleanup;
if ((retval = krb5_set_default_tgs_ktypes(ctx, NULL)))
goto cleanup;
if ((retval = krb5_os_init_context(ctx)))
goto cleanup;
/* initialize the prng (not well, but passable) */
if ((retval = krb5_timeofday(ctx, &now)))
goto cleanup;
seed.length = sizeof(now);
seed.data = (char *) &now;
if ((retval = krb5_c_random_seed(ctx, &seed)))
goto cleanup;
ctx->default_realm = 0;
profile_get_integer(ctx->profile, "libdefaults", "clockskew",
0, 5 * 60, &tmp);
ctx->clockskew = tmp;
#if 0
/* Default ticket lifetime is currently not supported */
profile_get_integer(ctx->profile, "libdefaults", "tkt_lifetime",
0, 10 * 60 * 60, &tmp);
ctx->tkt_lifetime = tmp;
#endif
/* DCE 1.1 and below only support CKSUMTYPE_RSA_MD4 (2) */
/* DCE add kdc_req_checksum_type = 2 to krb5.conf */
profile_get_integer(ctx->profile, "libdefaults",
"kdc_req_checksum_type", 0, CKSUMTYPE_RSA_MD5,
&tmp);
ctx->kdc_req_sumtype = tmp;
profile_get_integer(ctx->profile, "libdefaults",
"ap_req_checksum_type", 0, CKSUMTYPE_RSA_MD5,
&tmp);
ctx->default_ap_req_sumtype = tmp;
profile_get_integer(ctx->profile, "libdefaults",
"safe_checksum_type", 0,
CKSUMTYPE_RSA_MD5_DES, &tmp);
ctx->default_safe_sumtype = tmp;
profile_get_integer(ctx->profile, "libdefaults",
"kdc_default_options", 0,
KDC_OPT_RENEWABLE_OK, &tmp);
ctx->kdc_default_options = KDC_OPT_RENEWABLE_OK;
#ifdef macintosh
#define DEFAULT_KDC_TIMESYNC 1
#else
#define DEFAULT_KDC_TIMESYNC 0
#endif
profile_get_integer(ctx->profile, "libdefaults",
"kdc_timesync", 0, DEFAULT_KDC_TIMESYNC,
&tmp);
ctx->library_options = tmp ? KRB5_LIBOPT_SYNC_KDCTIME : 0;
/*
* We use a default file credentials cache of 3. See
* lib/krb5/krb/ccache/file/fcc.h for a description of the
* credentials cache types.
*
* Note: DCE 1.0.3a only supports a cache type of 1
* DCE 1.1 supports a cache type of 2.
*/
#ifdef macintosh
#define DEFAULT_CCACHE_TYPE 4
#else
#define DEFAULT_CCACHE_TYPE 3
#endif
profile_get_integer(ctx->profile, "libdefaults", "ccache_type",
0, DEFAULT_CCACHE_TYPE, &tmp);
ctx->fcc_default_format = tmp + 0x0500;
ctx->scc_default_format = tmp + 0x0500;
*context = ctx;
return 0;
cleanup:
krb5_free_context(ctx);
return retval;
}
KRB5_DLLIMP void KRB5_CALLCONV
krb5_free_context(ctx)
krb5_context ctx;
{
krb5_free_ets(ctx);
krb5_os_free_context(ctx);
if (ctx->in_tkt_ktypes)
free(ctx->in_tkt_ktypes);
if (ctx->tgs_ktypes)
free(ctx->tgs_ktypes);
if (ctx->default_realm)
free(ctx->default_realm);
if (ctx->ser_ctx_count && ctx->ser_ctx)
free(ctx->ser_ctx);
ctx->magic = 0;
free(ctx);
}
/*
* Set the desired default ktypes, making sure they are valid.
*/
krb5_error_code
krb5_set_default_in_tkt_ktypes(context, ktypes)
krb5_context context;
const krb5_enctype *ktypes;
{
krb5_enctype * new_ktypes;
int i;
if (ktypes) {
for (i = 0; ktypes[i]; i++) {
if (!valid_enctype(ktypes[i]))
return KRB5_PROG_ETYPE_NOSUPP;
}
/* Now copy the default ktypes into the context pointer */
if ((new_ktypes = (krb5_enctype *)malloc(sizeof(krb5_enctype) * i)))
memcpy(new_ktypes, ktypes, sizeof(krb5_enctype) * i);
else
return ENOMEM;
} else {
i = 0;
new_ktypes = 0;
}
if (context->in_tkt_ktypes)
free(context->in_tkt_ktypes);
context->in_tkt_ktypes = new_ktypes;
context->in_tkt_ktype_count = i;
return 0;
}
static krb5_error_code
get_profile_etype_list(context, ktypes, profstr, ctx_count, ctx_list)
krb5_context context;
krb5_enctype **ktypes;
char *profstr;
int ctx_count;
krb5_enctype FAR *ctx_list;
{
krb5_enctype *old_ktypes;
if (context->in_tkt_ktype_count) {
/* application-set defaults */
if ((old_ktypes =
(krb5_enctype *)malloc(sizeof(krb5_enctype) *
(ctx_count + 1)))) {
memcpy(old_ktypes, ctx_list, sizeof(krb5_enctype) * ctx_count);
old_ktypes[ctx_count] = 0;
} else {
return ENOMEM;
}
} else {
/*
XXX - For now, we only support libdefaults
Perhaps this should be extended to allow for per-host / per-realm
session key types.
*/
char *retval;
char *sp, *ep;
int i, j, count;
krb5_error_code code;
code = profile_get_string(context->profile, "libdefaults", profstr,
NULL,
"des3-hmac-sha1 des-cbc-md5 des-cbc-crc",
&retval);
if (code)
return code;
count = 0;
sp = retval;
while (sp) {
for (ep = sp; *ep && (*ep != ',') && !isspace(*ep); ep++)
;
if (*ep) {
*ep++ = '\0';
while (isspace(*ep))
ep++;
} else
ep = (char *) NULL;
count++;
sp = ep;
}
if ((old_ktypes =
(krb5_enctype *)malloc(sizeof(krb5_enctype) * (count + 1))) ==
(krb5_enctype *) NULL)
return ENOMEM;
sp = retval;
j = 0;
i = 1;
while (1) {
if (! krb5_string_to_enctype(sp, &old_ktypes[j]))
j++;
if (i++ >= count)
break;
/* skip to next token */
while (*sp) sp++;
while (! *sp) sp++;
}
old_ktypes[j] = (krb5_enctype) 0;
free(retval);
}
*ktypes = old_ktypes;
return 0;
}
krb5_error_code
krb5_get_default_in_tkt_ktypes(context, ktypes)
krb5_context context;
krb5_enctype **ktypes;
{
return(get_profile_etype_list(context, ktypes, "default_tkt_enctypes",
context->in_tkt_ktype_count,
context->in_tkt_ktypes));
}
krb5_error_code
krb5_set_default_tgs_ktypes(context, ktypes)
krb5_context context;
const krb5_enctype *ktypes;
{
krb5_enctype * new_ktypes;
int i;
if (ktypes) {
for (i = 0; ktypes[i]; i++) {
if (!valid_enctype(ktypes[i]))
return KRB5_PROG_ETYPE_NOSUPP;
}
/* Now copy the default ktypes into the context pointer */
if ((new_ktypes = (krb5_enctype *)malloc(sizeof(krb5_enctype) * i)))
memcpy(new_ktypes, ktypes, sizeof(krb5_enctype) * i);
else
return ENOMEM;
} else {
i = 0;
new_ktypes = (krb5_enctype *)NULL;
}
if (context->tgs_ktypes)
free(context->tgs_ktypes);
context->tgs_ktypes = new_ktypes;
context->tgs_ktype_count = i;
return 0;
}
krb5_error_code
krb5_get_tgs_ktypes(context, princ, ktypes)
krb5_context context;
krb5_const_principal princ;
krb5_enctype **ktypes;
{
return(get_profile_etype_list(context, ktypes, "default_tgs_enctypes",
context->tgs_ktype_count,
context->tgs_ktypes));
}
krb5_error_code
krb5_get_permitted_enctypes(context, ktypes)
krb5_context context;
krb5_enctype **ktypes;
{
return(get_profile_etype_list(context, ktypes, "permitted_enctypes",
context->tgs_ktype_count,
context->tgs_ktypes));
}
krb5_boolean
krb5_is_permitted_enctype(context, etype)
krb5_context context;
krb5_enctype etype;
{
krb5_enctype *list, *ptr;
krb5_boolean ret;
if (krb5_get_permitted_enctypes(context, &list))
return(0);
ret = 0;
for (ptr = list; *ptr; ptr++)
if (*ptr == etype)
ret = 1;
krb5_xfree(list);
return(ret);
}
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