744bd74233
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@13022 ec53bebd-3082-4978-b11e-865c3cabbd6b
455 lines
11 KiB
C
455 lines
11 KiB
C
/*
|
|
* Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* 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. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS 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 INSTITUTE OR 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.
|
|
*/
|
|
|
|
#include "krb5_locl.h"
|
|
RCSID("$Id$");
|
|
|
|
#include "krb5-v4compat.h"
|
|
|
|
static krb5_error_code
|
|
check_ticket_flags(TicketFlags f)
|
|
{
|
|
return 0; /* maybe add some more tests here? */
|
|
}
|
|
|
|
/* include this here, to avoid dependencies on libkrb */
|
|
|
|
static const int _tkt_lifetimes[TKTLIFENUMFIXED] = {
|
|
38400, 41055, 43894, 46929, 50174, 53643, 57352, 61318,
|
|
65558, 70091, 74937, 80119, 85658, 91581, 97914, 104684,
|
|
111922, 119661, 127935, 136781, 146239, 156350, 167161, 178720,
|
|
191077, 204289, 218415, 233517, 249664, 266926, 285383, 305116,
|
|
326213, 348769, 372885, 398668, 426234, 455705, 487215, 520904,
|
|
556921, 595430, 636601, 680618, 727680, 777995, 831789, 889303,
|
|
950794, 1016537, 1086825, 1161973, 1242318, 1328218, 1420057, 1518247,
|
|
1623226, 1735464, 1855462, 1983758, 2120925, 2267576, 2424367, 2592000
|
|
};
|
|
|
|
int
|
|
_krb5_krb_time_to_life(time_t start, time_t end)
|
|
{
|
|
int i;
|
|
time_t life = end - start;
|
|
|
|
if (life > MAXTKTLIFETIME || life <= 0)
|
|
return 0;
|
|
#if 0
|
|
if (krb_no_long_lifetimes)
|
|
return (life + 5*60 - 1)/(5*60);
|
|
#endif
|
|
|
|
if (end >= NEVERDATE)
|
|
return TKTLIFENOEXPIRE;
|
|
if (life < _tkt_lifetimes[0])
|
|
return (life + 5*60 - 1)/(5*60);
|
|
for (i=0; i<TKTLIFENUMFIXED; i++)
|
|
if (life <= _tkt_lifetimes[i])
|
|
return i + TKTLIFEMINFIXED;
|
|
return 0;
|
|
|
|
}
|
|
|
|
time_t
|
|
_krb5_krb_life_to_time(int start, int life_)
|
|
{
|
|
unsigned char life = (unsigned char) life_;
|
|
|
|
#if 0
|
|
if (krb_no_long_lifetimes)
|
|
return start + life*5*60;
|
|
#endif
|
|
|
|
if (life == TKTLIFENOEXPIRE)
|
|
return NEVERDATE;
|
|
if (life < TKTLIFEMINFIXED)
|
|
return start + life*5*60;
|
|
if (life > TKTLIFEMAXFIXED)
|
|
return start + MAXTKTLIFETIME;
|
|
return start + _tkt_lifetimes[life - TKTLIFEMINFIXED];
|
|
}
|
|
|
|
/*
|
|
* Get the name of the krb4 credentials cache, will use `tkfile' as
|
|
* the name if that is passed in. `cc' must be free()ed by caller,
|
|
*/
|
|
|
|
static krb5_error_code
|
|
get_krb4_cc_name(const char *tkfile, char **cc)
|
|
{
|
|
|
|
*cc = NULL;
|
|
if(tkfile == NULL) {
|
|
char *path;
|
|
if(!issuid()) {
|
|
path = getenv("KRBTKFILE");
|
|
if (path)
|
|
*cc = strdup(path);
|
|
}
|
|
if(*cc == NULL)
|
|
if (asprintf(cc, "%s%u", TKT_ROOT, (unsigned)getuid()) < 0)
|
|
return errno;
|
|
} else {
|
|
*cc = strdup(tkfile);
|
|
if (*cc == NULL)
|
|
return ENOMEM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Write a Kerberos 4 ticket file
|
|
*/
|
|
|
|
#define KRB5_TF_LCK_RETRY_COUNT 50
|
|
#define KRB5_TF_LCK_RETRY 1
|
|
|
|
static krb5_error_code
|
|
write_v4_cc(krb5_context context, const char *tkfile,
|
|
krb5_storage *sp, int append)
|
|
{
|
|
krb5_error_code ret;
|
|
struct stat sb;
|
|
krb5_data data;
|
|
char *path;
|
|
int fd, i;
|
|
|
|
ret = get_krb4_cc_name(tkfile, &path);
|
|
if (ret) {
|
|
krb5_set_error_string(context,
|
|
"krb5_krb_tf_setup: failed getting "
|
|
"the krb4 credentials cache name");
|
|
return ret;
|
|
}
|
|
|
|
fd = open(path, O_WRONLY|O_CREAT, 0600);
|
|
if (fd < 0) {
|
|
free(path);
|
|
krb5_set_error_string(context,
|
|
"krb5_krb_tf_setup: error opening file %s",
|
|
path);
|
|
return errno;
|
|
}
|
|
|
|
if (fstat(fd, &sb) != 0 || !S_ISREG(sb.st_mode)) {
|
|
free(path);
|
|
close(fd);
|
|
krb5_set_error_string(context,
|
|
"krb5_krb_tf_setup: tktfile %s is not a file",
|
|
path);
|
|
return KRB5_FCC_PERM;
|
|
}
|
|
|
|
for (i = 0; i < KRB5_TF_LCK_RETRY_COUNT; i++) {
|
|
if (flock(fd, LOCK_EX | LOCK_NB) < 0) {
|
|
sleep(KRB5_TF_LCK_RETRY);
|
|
} else
|
|
break;
|
|
}
|
|
if (i == KRB5_TF_LCK_RETRY_COUNT) {
|
|
free(path);
|
|
close(fd);
|
|
krb5_set_error_string(context,
|
|
"krb5_krb_tf_setup: failed to lock %s",
|
|
path);
|
|
return KRB5_FCC_PERM;
|
|
}
|
|
|
|
if (!append) {
|
|
ret = ftruncate(fd, 0);
|
|
if (ret < 0) {
|
|
flock(fd, LOCK_UN);
|
|
free(path);
|
|
close(fd);
|
|
krb5_set_error_string(context,
|
|
"krb5_krb_tf_setup: failed to truncate %s",
|
|
path);
|
|
return KRB5_FCC_PERM;
|
|
}
|
|
}
|
|
ret = lseek(fd, 0L, SEEK_END);
|
|
if (ret < 0) {
|
|
ret = errno;
|
|
flock(fd, LOCK_UN);
|
|
free(path);
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
|
|
krb5_storage_to_data(sp, &data);
|
|
|
|
ret = write(fd, data.data, data.length);
|
|
if (ret != data.length)
|
|
ret = KRB5_CC_IO;
|
|
|
|
krb5_free_data_contents(context, &data);
|
|
|
|
flock(fd, LOCK_UN);
|
|
free(path);
|
|
close(fd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
krb5_error_code
|
|
_krb5_krb_tf_setup(krb5_context context,
|
|
struct credentials *v4creds,
|
|
const char *tkfile,
|
|
int append)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_storage *sp;
|
|
|
|
sp = krb5_storage_emem();
|
|
if (sp == NULL)
|
|
return ENOMEM;
|
|
|
|
krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_HOST);
|
|
krb5_storage_set_eof_code(sp, KRB5_CC_IO);
|
|
|
|
krb5_clear_error_string(context);
|
|
|
|
if (!append) {
|
|
ret = krb5_store_stringz(sp, v4creds->pname);
|
|
if (ret < 0)
|
|
goto error;
|
|
ret = krb5_store_stringz(sp, v4creds->pinst);
|
|
if (ret < 0)
|
|
goto error;
|
|
}
|
|
|
|
/* cred */
|
|
ret = krb5_store_stringz(sp, v4creds->service);
|
|
if (ret < 0)
|
|
goto error;
|
|
ret = krb5_store_stringz(sp, v4creds->instance);
|
|
if (ret < 0)
|
|
goto error;
|
|
ret = krb5_store_stringz(sp, v4creds->realm);
|
|
if (ret < 0)
|
|
goto error;
|
|
ret = krb5_storage_write(sp, v4creds->session, 8);
|
|
if (ret != 8) {
|
|
ret = KRB5_CC_IO;
|
|
goto error;
|
|
}
|
|
ret = krb5_store_int32(sp, v4creds->lifetime);
|
|
if (ret)
|
|
goto error;
|
|
ret = krb5_store_int32(sp, v4creds->kvno);
|
|
if (ret)
|
|
goto error;
|
|
ret = krb5_store_int32(sp, v4creds->ticket_st.length);
|
|
if (ret)
|
|
goto error;
|
|
|
|
ret = krb5_storage_write(sp, v4creds->ticket_st.dat,
|
|
v4creds->ticket_st.length);
|
|
if (ret != v4creds->ticket_st.length) {
|
|
ret = KRB5_CC_IO;
|
|
goto error;
|
|
}
|
|
ret = krb5_store_int32(sp, v4creds->issue_date);
|
|
if (ret)
|
|
goto error;
|
|
|
|
ret = write_v4_cc(context, tkfile, sp, append);
|
|
|
|
error:
|
|
krb5_storage_free(sp);
|
|
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code
|
|
_krb5_krb_dest_tkt(krb5_context context, const char *tkfile)
|
|
{
|
|
krb5_error_code ret;
|
|
char *path;
|
|
|
|
ret = get_krb4_cc_name(tkfile, &path);
|
|
if (ret) {
|
|
krb5_set_error_string(context,
|
|
"krb5_krb_tf_setup: failed getting "
|
|
"the krb4 credentials cache name");
|
|
return ret;
|
|
}
|
|
|
|
if (unlink(path) < 0) {
|
|
ret = errno;
|
|
krb5_set_error_string(context,
|
|
"krb5_krb_dest_tkt failed removing the cache "
|
|
"with error %s", strerror(ret));
|
|
}
|
|
free(path);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* Convert the v5 credentials in `in_cred' to v4-dito in `v4creds'.
|
|
* This is done by sending them to the 524 function in the KDC. If
|
|
* `in_cred' doesn't contain a DES session key, then a new one is
|
|
* gotten from the KDC and stored in the cred cache `ccache'.
|
|
*/
|
|
|
|
krb5_error_code
|
|
krb524_convert_creds_kdc(krb5_context context,
|
|
krb5_creds *in_cred,
|
|
struct credentials *v4creds)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_data reply;
|
|
krb5_storage *sp;
|
|
int32_t tmp;
|
|
krb5_data ticket;
|
|
char realm[REALM_SZ];
|
|
krb5_creds *v5_creds = in_cred;
|
|
|
|
ret = check_ticket_flags(v5_creds->flags.b);
|
|
if(ret)
|
|
goto out2;
|
|
|
|
{
|
|
krb5_krbhst_handle handle;
|
|
|
|
ret = krb5_krbhst_init(context,
|
|
krb5_principal_get_realm(context,
|
|
v5_creds->server),
|
|
KRB5_KRBHST_KRB524,
|
|
&handle);
|
|
if (ret)
|
|
goto out2;
|
|
|
|
ret = krb5_sendto (context,
|
|
&v5_creds->ticket,
|
|
handle,
|
|
&reply);
|
|
krb5_krbhst_free(context, handle);
|
|
if (ret)
|
|
goto out2;
|
|
}
|
|
sp = krb5_storage_from_mem(reply.data, reply.length);
|
|
if(sp == NULL) {
|
|
ret = ENOMEM;
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
goto out2;
|
|
}
|
|
krb5_ret_int32(sp, &tmp);
|
|
ret = tmp;
|
|
if(ret == 0) {
|
|
memset(v4creds, 0, sizeof(*v4creds));
|
|
ret = krb5_ret_int32(sp, &tmp);
|
|
if(ret)
|
|
goto out;
|
|
v4creds->kvno = tmp;
|
|
ret = krb5_ret_data(sp, &ticket);
|
|
if(ret)
|
|
goto out;
|
|
v4creds->ticket_st.length = ticket.length;
|
|
memcpy(v4creds->ticket_st.dat, ticket.data, ticket.length);
|
|
krb5_data_free(&ticket);
|
|
ret = krb5_524_conv_principal(context,
|
|
v5_creds->server,
|
|
v4creds->service,
|
|
v4creds->instance,
|
|
v4creds->realm);
|
|
if(ret)
|
|
goto out;
|
|
v4creds->issue_date = v5_creds->times.starttime;
|
|
v4creds->lifetime = _krb5_krb_time_to_life(v4creds->issue_date,
|
|
v5_creds->times.endtime);
|
|
ret = krb5_524_conv_principal(context, v5_creds->client,
|
|
v4creds->pname,
|
|
v4creds->pinst,
|
|
realm);
|
|
if(ret)
|
|
goto out;
|
|
memcpy(v4creds->session, v5_creds->session.keyvalue.data, 8);
|
|
} else {
|
|
krb5_set_error_string(context, "converting credentials: %s",
|
|
krb5_get_err_text(context, ret));
|
|
}
|
|
out:
|
|
krb5_storage_free(sp);
|
|
krb5_data_free(&reply);
|
|
out2:
|
|
if (v5_creds != in_cred)
|
|
krb5_free_creds (context, v5_creds);
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code
|
|
krb524_convert_creds_kdc_ccache(krb5_context context,
|
|
krb5_ccache ccache,
|
|
krb5_creds *in_cred,
|
|
struct credentials *v4creds)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_creds *v5_creds = in_cred;
|
|
krb5_keytype keytype;
|
|
|
|
keytype = v5_creds->session.keytype;
|
|
|
|
if (keytype != ENCTYPE_DES_CBC_CRC) {
|
|
/* MIT krb524d doesn't like nothing but des-cbc-crc tickets,
|
|
so go get one */
|
|
krb5_creds template;
|
|
|
|
memset (&template, 0, sizeof(template));
|
|
template.session.keytype = ENCTYPE_DES_CBC_CRC;
|
|
ret = krb5_copy_principal (context, in_cred->client, &template.client);
|
|
if (ret) {
|
|
krb5_free_creds_contents (context, &template);
|
|
return ret;
|
|
}
|
|
ret = krb5_copy_principal (context, in_cred->server, &template.server);
|
|
if (ret) {
|
|
krb5_free_creds_contents (context, &template);
|
|
return ret;
|
|
}
|
|
|
|
ret = krb5_get_credentials (context, 0, ccache,
|
|
&template, &v5_creds);
|
|
krb5_free_creds_contents (context, &template);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = krb524_convert_creds_kdc(context, v5_creds, v4creds);
|
|
|
|
if (v5_creds != in_cred)
|
|
krb5_free_creds (context, v5_creds);
|
|
return ret;
|
|
}
|