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/*
* Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved.
*
*/
#include <stdio.h>
#include <gssrpc/rpc.h>
#include <gssapi/gssapi_krb5.h> /* for gss_nt_krb5_name */
#include <syslog.h>
#include "autoconf.h"
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#include <kadm5/kadm_rpc.h>
#include <krb5.h>
#include <kadm5/admin.h>
#include <adm_proto.h>
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#include "misc.h"
#include "kadm5/server_internal.h"
extern void *global_server_handle;
static int check_rpcsec_auth(struct svc_req *);
static int gss_to_krb5_name(struct svc_req *, krb5_context, gss_name_t, krb5_principal *, gss_buffer_t);
void log_badauth(OM_uint32 major, OM_uint32 minor,
struct sockaddr_in *addr, char *data);
/*
* Function: kadm_1
*
* Purpose: RPC proccessing procedure.
* originally generated from rpcgen
*
* Arguments:
* rqstp (input) rpc request structure
* transp (input) rpc transport structure
* (input/output)
* <return value>
*
* Requires:
* Effects:
* Modifies:
*/
void kadm_1(rqstp, transp)
struct svc_req *rqstp;
register SVCXPRT *transp;
{
union {
cprinc_arg create_principal_2_arg;
dprinc_arg delete_principal_2_arg;
mprinc_arg modify_principal_2_arg;
rprinc_arg rename_principal_2_arg;
gprinc_arg get_principal_2_arg;
chpass_arg chpass_principal_2_arg;
chrand_arg chrand_principal_2_arg;
cpol_arg create_policy_2_arg;
dpol_arg delete_policy_2_arg;
mpol_arg modify_policy_2_arg;
gpol_arg get_policy_2_arg;
setkey_arg setkey_principal_2_arg;
setv4key_arg setv4key_principal_2_arg;
cprinc3_arg create_principal3_2_arg;
chpass3_arg chpass_principal3_2_arg;
chrand3_arg chrand_principal3_2_arg;
setkey3_arg setkey_principal3_2_arg;
} argument;
char *result;
bool_t (*xdr_argument)(), (*xdr_result)();
char *(*local)();
if (rqstp->rq_cred.oa_flavor != AUTH_GSSAPI &&
!check_rpcsec_auth(rqstp)) {
krb5_klog_syslog(LOG_ERR, "Authentication attempt failed: %s, "
"RPC authentication flavor %d",
inet_ntoa(rqstp->rq_xprt->xp_raddr.sin_addr),
rqstp->rq_cred.oa_flavor);
svcerr_weakauth(transp);
return;
}
switch (rqstp->rq_proc) {
case NULLPROC:
(void) svc_sendreply(transp, xdr_void, (char *)NULL);
return;
case CREATE_PRINCIPAL:
xdr_argument = xdr_cprinc_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) create_principal_2_svc;
break;
case DELETE_PRINCIPAL:
xdr_argument = xdr_dprinc_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) delete_principal_2_svc;
break;
case MODIFY_PRINCIPAL:
xdr_argument = xdr_mprinc_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) modify_principal_2_svc;
break;
case RENAME_PRINCIPAL:
xdr_argument = xdr_rprinc_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) rename_principal_2_svc;
break;
case GET_PRINCIPAL:
xdr_argument = xdr_gprinc_arg;
xdr_result = xdr_gprinc_ret;
local = (char *(*)()) get_principal_2_svc;
break;
case GET_PRINCS:
xdr_argument = xdr_gprincs_arg;
xdr_result = xdr_gprincs_ret;
local = (char *(*)()) get_princs_2_svc;
break;
case CHPASS_PRINCIPAL:
xdr_argument = xdr_chpass_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) chpass_principal_2_svc;
break;
case SETV4KEY_PRINCIPAL:
xdr_argument = xdr_setv4key_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) setv4key_principal_2_svc;
break;
case SETKEY_PRINCIPAL:
xdr_argument = xdr_setkey_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) setkey_principal_2_svc;
break;
case CHRAND_PRINCIPAL:
xdr_argument = xdr_chrand_arg;
xdr_result = xdr_chrand_ret;
local = (char *(*)()) chrand_principal_2_svc;
break;
case CREATE_POLICY:
xdr_argument = xdr_cpol_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) create_policy_2_svc;
break;
case DELETE_POLICY:
xdr_argument = xdr_dpol_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) delete_policy_2_svc;
break;
case MODIFY_POLICY:
xdr_argument = xdr_mpol_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) modify_policy_2_svc;
break;
case GET_POLICY:
xdr_argument = xdr_gpol_arg;
xdr_result = xdr_gpol_ret;
local = (char *(*)()) get_policy_2_svc;
break;
case GET_POLS:
xdr_argument = xdr_gpols_arg;
xdr_result = xdr_gpols_ret;
local = (char *(*)()) get_pols_2_svc;
break;
case GET_PRIVS:
xdr_argument = xdr_u_int32;
xdr_result = xdr_getprivs_ret;
local = (char *(*)()) get_privs_2_svc;
break;
case INIT:
xdr_argument = xdr_u_int32;
xdr_result = xdr_generic_ret;
local = (char *(*)()) init_2_svc;
break;
case CREATE_PRINCIPAL3:
xdr_argument = xdr_cprinc3_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) create_principal3_2_svc;
break;
case CHPASS_PRINCIPAL3:
xdr_argument = xdr_chpass3_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) chpass_principal3_2_svc;
break;
case CHRAND_PRINCIPAL3:
xdr_argument = xdr_chrand3_arg;
xdr_result = xdr_chrand_ret;
local = (char *(*)()) chrand_principal3_2_svc;
break;
case SETKEY_PRINCIPAL3:
xdr_argument = xdr_setkey3_arg;
xdr_result = xdr_generic_ret;
local = (char *(*)()) setkey_principal3_2_svc;
break;
default:
krb5_klog_syslog(LOG_ERR, "Invalid KADM5 procedure number: %s, %d",
inet_ntoa(rqstp->rq_xprt->xp_raddr.sin_addr),
rqstp->rq_proc);
svcerr_noproc(transp);
return;
}
memset((char *)&argument, 0, sizeof(argument));
if (!svc_getargs(transp, xdr_argument, &argument)) {
svcerr_decode(transp);
return;
}
result = (*local)(&argument, rqstp);
if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
krb5_klog_syslog(LOG_ERR, "WARNING! Unable to send function results, "
"continuing.");
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, xdr_argument, &argument)) {
krb5_klog_syslog(LOG_ERR, "WARNING! Unable to free arguments, "
"continuing.");
}
return;
}
static int
check_rpcsec_auth(struct svc_req *rqstp)
{
gss_ctx_id_t ctx;
krb5_context kctx;
OM_uint32 maj_stat, min_stat;
gss_name_t name;
krb5_principal princ;
int ret, success;
krb5_data *c1, *c2, *realm;
gss_buffer_desc gss_str;
kadm5_server_handle_t handle;
success = 0;
handle = (kadm5_server_handle_t)global_server_handle;
if (rqstp->rq_cred.oa_flavor != RPCSEC_GSS)
return 0;
ctx = rqstp->rq_svccred;
maj_stat = gss_inquire_context(&min_stat, ctx, NULL, &name,
NULL, NULL, NULL, NULL, NULL);
if (maj_stat != GSS_S_COMPLETE) {
krb5_klog_syslog(LOG_ERR, "check_rpcsec_auth: "
"failed inquire_context, stat=%u", maj_stat);
log_badauth(maj_stat, min_stat,
&rqstp->rq_xprt->xp_raddr, NULL);
goto fail_name;
}
kctx = handle->context;
ret = gss_to_krb5_name(rqstp, kctx, name, &princ, &gss_str);
if (ret == 0)
goto fail_name;
/*
* Since we accept with GSS_C_NO_NAME, the client can authenticate
* against the entire kdb. Therefore, ensure that the service
* name is something reasonable.
*/
if (krb5_princ_size(kctx, princ) != 2)
goto fail_princ;
c1 = krb5_princ_component(kctx, princ, 0);
c2 = krb5_princ_component(kctx, princ, 1);
realm = krb5_princ_realm(kctx, princ);
if (strncmp(handle->params.realm, realm->data, realm->length) == 0
&& strncmp("kadmin", c1->data, c1->length) == 0) {
if (strncmp("history", c2->data, c2->length) == 0)
goto fail_princ;
else
success = 1;
}
fail_princ:
if (!success) {
krb5_klog_syslog(LOG_ERR, "bad service principal %.*s",
gss_str.length, gss_str.value);
}
gss_release_buffer(&min_stat, &gss_str);
krb5_free_principal(kctx, princ);
fail_name:
gss_release_name(&min_stat, &name);
return success;
}
static int
gss_to_krb5_name(struct svc_req *rqstp, krb5_context ctx, gss_name_t gss_name,
krb5_principal *princ, gss_buffer_t gss_str)
{
OM_uint32 status, minor_stat;
gss_OID gss_type;
char *str;
int success;
status = gss_display_name(&minor_stat, gss_name, gss_str, &gss_type);
if ((status != GSS_S_COMPLETE) || (gss_type != gss_nt_krb5_name)) {
krb5_klog_syslog(LOG_ERR,
"gss_to_krb5_name: "
"failed display_name status %d", status);
log_badauth(status, minor_stat,
&rqstp->rq_xprt->xp_raddr, NULL);
return 0;
}
str = malloc(gss_str->length +1);
if (str == NULL)
return 0;
*str = '\0';
strncat(str, gss_str->value, gss_str->length);
success = (krb5_parse_name(ctx, str, princ) == 0);
free(str);
return success;
}
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