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|
/*
* Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved
*/
/*
* 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 <stdio.h>
#include <netdb.h>
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#include <string.h>
#include <com_err.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <krb5.h>
#include <k5-int.h> /* for KRB5_ADM_DEFAULT_PORT */
#ifdef __STDC__
#include <stdlib.h>
#endif
#include <kadm5/admin.h>
#include <kadm5/kadm_rpc.h>
#include "client_internal.h"
#include <gssrpc/rpc.h>
#include <gssapi/gssapi.h>
#include <gssapi/gssapi_krb5.h>
#include <gssrpc/auth_gssapi.h>
#define ADM_CCACHE "/tmp/ovsec_adm.XXXXXX"
static int old_auth_gssapi = 0;
enum init_type { INIT_PASS, INIT_SKEY, INIT_CREDS };
static kadm5_ret_t _kadm5_init_any(char *client_name,
enum init_type init_type,
char *pass,
krb5_ccache ccache_in,
char *service_name,
kadm5_config_params *params,
krb5_ui_4 struct_version,
krb5_ui_4 api_version,
void **server_handle);
kadm5_ret_t kadm5_init_with_creds(char *client_name,
krb5_ccache ccache,
char *service_name,
kadm5_config_params *params,
krb5_ui_4 struct_version,
krb5_ui_4 api_version,
void **server_handle)
{
return _kadm5_init_any(client_name, INIT_CREDS, NULL, ccache,
service_name, params,
struct_version, api_version,
server_handle);
}
kadm5_ret_t kadm5_init_with_password(char *client_name, char *pass,
char *service_name,
kadm5_config_params *params,
krb5_ui_4 struct_version,
krb5_ui_4 api_version,
void **server_handle)
{
return _kadm5_init_any(client_name, INIT_PASS, pass, NULL,
service_name, params, struct_version,
api_version, server_handle);
}
kadm5_ret_t kadm5_init(char *client_name, char *pass,
char *service_name,
kadm5_config_params *params,
krb5_ui_4 struct_version,
krb5_ui_4 api_version,
void **server_handle)
{
return _kadm5_init_any(client_name, INIT_PASS, pass, NULL,
service_name, params, struct_version,
api_version, server_handle);
}
kadm5_ret_t kadm5_init_with_skey(char *client_name, char *keytab,
char *service_name,
kadm5_config_params *params,
krb5_ui_4 struct_version,
krb5_ui_4 api_version,
void **server_handle)
{
return _kadm5_init_any(client_name, INIT_SKEY, keytab, NULL,
service_name, params, struct_version,
api_version, server_handle);
}
/*
* Try no preauthentication first; then try the encrypted timestamp
* (stolen from krb5 kinit.c)
*/
static int preauth_search_list[] = {
0,
KRB5_PADATA_ENC_UNIX_TIME,
-1
};
static kadm5_ret_t _kadm5_init_any(char *client_name,
enum init_type init_type,
char *pass,
krb5_ccache ccache_in,
char *service_name,
kadm5_config_params *params_in,
krb5_ui_4 struct_version,
krb5_ui_4 api_version,
void **server_handle)
{
struct sockaddr_in addr;
struct hostent *hp;
int fd;
int i;
char full_service_name[BUFSIZ], *ccname_orig;
const char *c_ccname_orig;
char *realm;
krb5_creds creds;
krb5_ccache ccache = NULL;
krb5_timestamp now;
OM_uint32 gssstat, minor_stat;
gss_buffer_desc input_name;
gss_name_t gss_client;
#ifndef INIT_TEST
gss_name_t gss_target;
#endif
gss_cred_id_t gss_client_creds = GSS_C_NO_CREDENTIAL;
kadm5_server_handle_t handle;
kadm5_config_params params_local;
int code = 0;
generic_ret *r;
char svcname[MAXHOSTNAMELEN + 8];
initialize_ovk_error_table();
initialize_adb_error_table();
initialize_ovku_error_table();
if (! server_handle) {
return EINVAL;
}
if (! (handle = malloc(sizeof(*handle)))) {
return ENOMEM;
}
if (! (handle->lhandle = malloc(sizeof(*handle)))) {
free(handle);
return ENOMEM;
}
handle->magic_number = KADM5_SERVER_HANDLE_MAGIC;
handle->struct_version = struct_version;
handle->api_version = api_version;
handle->clnt = 0;
handle->cache_name = 0;
handle->destroy_cache = 0;
*handle->lhandle = *handle;
handle->lhandle->api_version = KADM5_API_VERSION_2;
handle->lhandle->struct_version = KADM5_STRUCT_VERSION;
handle->lhandle->lhandle = handle->lhandle;
krb5_init_context(&handle->context);
if(client_name == NULL) {
free(handle);
return EINVAL;
}
memset((char *) &creds, 0, sizeof(creds));
/*
* Verify the version numbers before proceeding; we can't use
* CHECK_HANDLE because not all fields are set yet.
*/
GENERIC_CHECK_HANDLE(handle, KADM5_OLD_LIB_API_VERSION,
KADM5_NEW_LIB_API_VERSION);
/*
* Acquire relevant profile entries. In version 2, merge values
* in params_in with values from profile, based on
* params_in->mask.
*
* In version 1, we've given a realm (which may be NULL) instead
* of params_in. So use that realm, make params_in contain an
* empty mask, and behave like version 2.
*/
memset((char *) ¶ms_local, 0, sizeof(params_local));
if (api_version == KADM5_API_VERSION_1) {
realm = params_local.realm = (char *) params_in;
if (params_in)
params_local.mask = KADM5_CONFIG_REALM;
/* Use old AUTH_GSSAPI for version 1 protocol. */
params_local.mask |= KADM5_CONFIG_OLD_AUTH_GSSAPI;
params_in = ¶ms_local;
} else {
if (params_in && (params_in->mask & KADM5_CONFIG_REALM))
realm = params_in->realm;
else
realm = NULL;
}
#define ILLEGAL_PARAMS (KADM5_CONFIG_DBNAME | KADM5_CONFIG_ADBNAME | \
KADM5_CONFIG_ADB_LOCKFILE | \
KADM5_CONFIG_ACL_FILE | KADM5_CONFIG_DICT_FILE \
| KADM5_CONFIG_ADMIN_KEYTAB | \
KADM5_CONFIG_STASH_FILE | \
KADM5_CONFIG_MKEY_NAME | KADM5_CONFIG_ENCTYPE \
| KADM5_CONFIG_MAX_LIFE | \
KADM5_CONFIG_MAX_RLIFE | \
KADM5_CONFIG_EXPIRATION | KADM5_CONFIG_FLAGS | \
KADM5_CONFIG_ENCTYPES | KADM5_CONFIG_MKEY_FROM_KBD)
if (params_in && params_in->mask & ILLEGAL_PARAMS) {
free(handle);
return KADM5_BAD_CLIENT_PARAMS;
}
if ((code = kadm5_get_config_params(handle->context,
DEFAULT_PROFILE_PATH,
"KRB5_CONFIG",
params_in,
&handle->params))) {
krb5_free_context(handle->context);
free(handle);
return(code);
}
#define REQUIRED_PARAMS (KADM5_CONFIG_REALM | \
KADM5_CONFIG_ADMIN_SERVER | \
KADM5_CONFIG_KADMIND_PORT)
if ((handle->params.mask & REQUIRED_PARAMS) != REQUIRED_PARAMS) {
krb5_free_context(handle->context);
free(handle);
return KADM5_MISSING_KRB5_CONF_PARAMS;
}
/* NULL service_name means use host-based. */
if (service_name == NULL) {
code = kadm5_get_admin_service_name(handle->context,
handle->params.realm,
svcname, sizeof(svcname));
if (code) {
krb5_free_context(handle->context);
free(handle);
return KADM5_MISSING_KRB5_CONF_PARAMS;
}
service_name = svcname;
}
/*
* Acquire a service ticket for service_name@realm in the name of
* client_name, using password pass (which could be NULL), and
* create a ccache to store them in. If INIT_CREDS, use the
* ccache we were provided instead.
*/
if ((code = krb5_parse_name(handle->context, client_name, &creds.client)))
goto error;
if (realm) {
if(strlen(service_name) + strlen(realm) + 1 >= sizeof(full_service_name)) {
goto error;
}
sprintf(full_service_name, "%s@%s", service_name, realm);
} else {
/* krb5_princ_realm(creds.client) is not null terminated */
if(strlen(service_name) + krb5_princ_realm(handle->context, creds.client)->length + 1 >= sizeof(full_service_name)) {
goto error;
}
strcpy(full_service_name, service_name);
strcat(full_service_name, "@");
strncat(full_service_name, krb5_princ_realm(handle->context,
creds.client)->data,
krb5_princ_realm(handle->context, creds.client)->length);
}
if ((code = krb5_parse_name(handle->context, full_service_name,
&creds.server)))
goto error;
/* XXX temporarily fix a bug in krb5_cc_get_type */
#undef krb5_cc_get_type
#define krb5_cc_get_type(context, cache) ((cache)->ops->prefix)
if (init_type == INIT_CREDS) {
ccache = ccache_in;
handle->cache_name = (char *)
malloc(strlen(krb5_cc_get_type(handle->context, ccache)) +
strlen(krb5_cc_get_name(handle->context, ccache)) + 2);
if (handle->cache_name == NULL) {
code = ENOMEM;
goto error;
}
sprintf(handle->cache_name, "%s:%s",
krb5_cc_get_type(handle->context, ccache),
krb5_cc_get_name(handle->context, ccache));
} else {
#if 0
handle->cache_name =
(char *) malloc(strlen(ADM_CCACHE)+strlen("FILE:")+1);
if (handle->cache_name == NULL) {
code = ENOMEM;
goto error;
}
sprintf(handle->cache_name, "FILE:%s", ADM_CCACHE);
mktemp(handle->cache_name + strlen("FILE:"));
#else
{
static int counter = 0;
handle->cache_name = malloc(sizeof("MEMORY:kadm5_")
+ 3*sizeof(counter));
sprintf(handle->cache_name, "MEMORY:kadm5_%u", counter++);
}
#endif
if ((code = krb5_cc_resolve(handle->context, handle->cache_name,
&ccache)))
goto error;
if ((code = krb5_cc_initialize (handle->context, ccache,
creds.client)))
goto error;
handle->destroy_cache = 1;
}
handle->lhandle->cache_name = handle->cache_name;
if ((code = krb5_timeofday(handle->context, &now)))
goto error;
/*
* Get a ticket, use the method specified in init_type.
*/
creds.times.starttime = 0; /* start timer at KDC */
creds.times.endtime = 0; /* endtime will be limited by service */
if (init_type == INIT_PASS) {
for (i=0; preauth_search_list[i] >= 0; i++) {
code = krb5_get_in_tkt_with_password(handle->context,
0, /* no options */
0, /* default addresses */
0, /* enctypes */
NULL, /* XXX preauth */
pass,
ccache,
&creds,
NULL);
if (code != KRB5KDC_ERR_PREAUTH_FAILED &&
code != KRB5KDC_ERR_PREAUTH_REQUIRED &&
code != KRB5KRB_ERR_GENERIC)
break;
}
} else if (init_type == INIT_SKEY) {
krb5_keytab kt = NULL;
if (pass && (code = krb5_kt_resolve(handle->context, pass, &kt)))
;
else {
for (i=0; preauth_search_list[i] >= 0; i++) {
code = krb5_get_in_tkt_with_keytab(handle->context,
0, /* no options */
0, /* default addrs */
0, /* enctypes */
NULL, /* XXX preauth */
kt,
ccache,
&creds,
NULL);
if (code != KRB5KDC_ERR_PREAUTH_FAILED &&
code != KRB5KDC_ERR_PREAUTH_REQUIRED &&
code != KRB5KRB_ERR_GENERIC)
break;
}
if (pass) krb5_kt_close(handle->context, kt);
}
}
/* Improved error messages */
if (code == KRB5KRB_AP_ERR_BAD_INTEGRITY) code = KADM5_BAD_PASSWORD;
if (code == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN)
code = KADM5_SECURE_PRINC_MISSING;
if (code != 0) goto error;
#ifdef ZEROPASSWD
if (pass != NULL)
memset(pass, 0, strlen(pass));
#endif
/*
* We have ticket; open the RPC connection.
*/
hp = gethostbyname(handle->params.admin_server);
if (hp == (struct hostent *) NULL) {
code = KADM5_BAD_SERVER_NAME;
goto cleanup;
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = hp->h_addrtype;
(void) memcpy((char *) &addr.sin_addr, (char *) hp->h_addr,
sizeof(addr.sin_addr));
addr.sin_port = htons((u_short) handle->params.kadmind_port);
fd = RPC_ANYSOCK;
handle->clnt = clnttcp_create(&addr, KADM, KADMVERS, &fd, 0, 0);
if (handle->clnt == NULL) {
code = KADM5_RPC_ERROR;
#ifdef DEBUG
clnt_pcreateerror("clnttcp_create");
#endif
goto error;
}
handle->lhandle->clnt = handle->clnt;
/* now that handle->clnt is set, we can check the handle */
if ((code = _kadm5_check_handle((void *) handle)))
goto error;
/*
* The RPC connection is open; establish the GSS-API
* authentication context.
*/
/* use the kadm5 cache */
gssstat = gss_krb5_ccache_name(&minor_stat, handle->cache_name,
&c_ccname_orig);
if (gssstat != GSS_S_COMPLETE) {
code = KADM5_GSS_ERROR;
goto error;
}
if (c_ccname_orig)
ccname_orig = strdup(c_ccname_orig);
else
ccname_orig = 0;
#ifndef INIT_TEST
input_name.value = full_service_name;
input_name.length = strlen((char *)input_name.value) + 1;
gssstat = gss_import_name(&minor_stat, &input_name,
(gss_OID) gss_nt_krb5_name, &gss_target);
if (gssstat != GSS_S_COMPLETE) {
code = KADM5_GSS_ERROR;
goto error;
}
#endif /* ! INIT_TEST */
input_name.value = client_name;
input_name.length = strlen((char *)input_name.value) + 1;
gssstat = gss_import_name(&minor_stat, &input_name,
(gss_OID) gss_nt_krb5_name, &gss_client);
if (gssstat != GSS_S_COMPLETE) {
code = KADM5_GSS_ERROR;
goto error;
}
gssstat = gss_acquire_cred(&minor_stat, gss_client, 0,
GSS_C_NULL_OID_SET, GSS_C_INITIATE,
&gss_client_creds, NULL, NULL);
(void) gss_release_name(&minor_stat, &gss_client);
if (gssstat != GSS_S_COMPLETE) {
code = KADM5_GSS_ERROR;
goto error;
}
#ifndef INIT_TEST
if (params_in != NULL &&
(params_in->mask & KADM5_CONFIG_OLD_AUTH_GSSAPI)) {
handle->clnt->cl_auth = auth_gssapi_create(handle->clnt,
&gssstat,
&minor_stat,
gss_client_creds,
gss_target,
(gss_OID) gss_mech_krb5,
GSS_C_MUTUAL_FLAG
| GSS_C_REPLAY_FLAG,
0,
NULL,
NULL,
NULL);
} else {
struct rpc_gss_sec sec;
sec.mech = gss_mech_krb5;
sec.qop = GSS_C_QOP_DEFAULT;
sec.svc = RPCSEC_GSS_SVC_PRIVACY;
handle->clnt->cl_auth = authgss_create(handle->clnt,
gss_target, &sec);
}
(void) gss_release_name(&minor_stat, &gss_target);
#endif /* ! INIT_TEST */
if (ccname_orig) {
gssstat = gss_krb5_ccache_name(&minor_stat, ccname_orig, NULL);
if (gssstat) {
code = KADM5_GSS_ERROR;
goto error;
}
free(ccname_orig);
} else {
gssstat = gss_krb5_ccache_name(&minor_stat, NULL, NULL);
if (gssstat) {
code = KADM5_GSS_ERROR;
goto error;
}
}
if (handle->clnt->cl_auth == NULL) {
code = KADM5_GSS_ERROR;
goto error;
}
r = init_1(&handle->api_version, handle->clnt);
if (r == NULL) {
code = KADM5_RPC_ERROR;
#ifdef DEBUG
clnt_perror(handle->clnt, "init_1 null resp");
#endif
goto error;
}
if (r->code) {
code = r->code;
goto error;
}
*server_handle = (void *) handle;
if (init_type != INIT_CREDS)
krb5_cc_close(handle->context, ccache);
goto cleanup;
error:
/*
* Note that it is illegal for this code to execute if "handle"
* has not been allocated and initialized. I.e., don't use "goto
* error" before the block of code at the top of the function
* that allocates and initializes "handle".
*/
if (handle->cache_name)
free(handle->cache_name);
if (handle->destroy_cache && ccache)
krb5_cc_destroy(handle->context, ccache);
if(handle->clnt && handle->clnt->cl_auth)
AUTH_DESTROY(handle->clnt->cl_auth);
if(handle->clnt)
clnt_destroy(handle->clnt);
cleanup:
krb5_free_cred_contents(handle->context, &creds);
if (gss_client_creds != GSS_C_NO_CREDENTIAL)
(void) gss_release_cred(&minor_stat, &gss_client_creds);
if (code)
free(handle);
return code;
}
kadm5_ret_t
kadm5_destroy(void *server_handle)
{
krb5_ccache ccache = NULL;
int code = KADM5_OK;
kadm5_server_handle_t handle =
(kadm5_server_handle_t) server_handle;
CHECK_HANDLE(server_handle);
if (handle->destroy_cache && handle->cache_name) {
if ((code = krb5_cc_resolve(handle->context,
handle->cache_name, &ccache)) == 0)
code = krb5_cc_destroy (handle->context, ccache);
}
if (handle->cache_name)
free(handle->cache_name);
if (handle->clnt && handle->clnt->cl_auth)
AUTH_DESTROY(handle->clnt->cl_auth);
if (handle->clnt)
clnt_destroy(handle->clnt);
if (handle->lhandle)
free (handle->lhandle);
kadm5_free_config_params(handle->context, &handle->params);
krb5_free_context(handle->context);
handle->magic_number = 0;
free(handle);
return code;
}
/* not supported on client */
kadm5_ret_t kadm5_lock(void *server_handle)
{
return EINVAL;
}
/* not supported on client */
kadm5_ret_t kadm5_unlock(void *server_handle)
{
return EINVAL;
}
kadm5_ret_t kadm5_flush(void *server_handle)
{
return KADM5_OK;
}
int _kadm5_check_handle(void *handle)
{
CHECK_HANDLE(handle);
return 0;
}
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