-/*
- * $Source$
- * $Author$
- * $Header$
+/* $Id$
*
- * Copyright (C) 1987 by the Massachusetts Institute of Technology
+ * Handle server side of authentication
*
- * $Log$
- * Revision 1.5 1987-07-14 00:40:18 wesommer
- * Rearranged logging.
+ * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology
+ * For copying and distribution information, please see the file
+ * <mit-copyright.h>.
*
- * Revision 1.4 87/06/30 20:03:46 wesommer
- * Put parsed kerberos principal name into the per-client structure.
- *
- * Revision 1.3 87/06/21 16:40:10 wesommer
- * Performance work, rearrangement of include files.
- *
- * Revision 1.2 87/06/04 01:34:35 wesommer
- * Added logging of arguments for some perverse reason.
- *
- * Revision 1.1 87/06/02 20:06:57 wesommer
- * Initial revision
- *
*/
-#ifndef lint
-static char *rcsid_sms_sauth_c = "$Header$";
-#endif lint
+#include <mit-copyright.h>
+#include "mr_server.h"
+
+#include <sys/types.h>
+
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+RCSID("$Header$");
+
+extern char *whoami, *host;
+extern int proxy_acl;
+extern krb5_context context;
-extern int krb_err_base;
-#include <strings.h>
-#include "sms_server.h"
+static int set_client(client *cl, char *kname,
+ char *name, char *inst, char *realm);
-extern char buf1[];
-extern char *whoami;
-extern char *malloc();
+#ifdef HAVE_KRB4
+typedef struct _replay_cache {
+ KTEXT_ST auth;
+ time_t expires;
+ struct _replay_cache *next;
+} replay_cache;
+
+replay_cache *rcache = NULL;
+#endif
/*
- * Handle a SMS_AUTH RPC request.
+ * Handle a MOIRA_AUTH RPC request.
*
* argv[0] is a kerberos authenticator. Decompose it, and if
- * successful, store the name the user authenticated to in
+ * successful, store the name the user authenticated to in
* cl->cl_name.
*/
-void
-do_auth(cl)
- client *cl;
+void do_auth(client *cl)
{
- KTEXT_ST auth;
- AUTH_DAT ad;
- int status;
- char buf[REALM_SZ+INST_SZ+ANAME_SZ];
- extern int krb_err_base;
-
- auth.length = cl->args->sms_argl[0];
-
- bcopy(cl->args->sms_argv[0], (char *)auth.dat, auth.length);
- auth.mbz = 0;
-
- if ((status = rd_ap_req (&auth, "sms", "sms", cl->haddr.sin_addr,
- &ad, "")) != KSUCCESS) {
- status += krb_err_base;
- cl->reply.sms_status = status;
- if (log_flags & LOG_RES)
- com_err(whoami, status, "(authentication failed)");
- return;
- }
- bcopy(ad.pname, cl->kname.name, ANAME_SZ);
- bcopy(ad.pinst, cl->kname.inst, INST_SZ);
- bcopy(ad.prealm, cl->kname.realm, REALM_SZ);
-
- (void) strcpy(buf, ad.pname);
- if(ad.pinst[0]) {
- (void) strcat(buf, ".");
- (void) strcat(buf, ad.pinst);
+#ifdef HAVE_KRB4
+ KTEXT_ST auth;
+ AUTH_DAT ad;
+ int status;
+ replay_cache *rc, *rcnew;
+ time_t now;
+
+ auth.length = cl->req.mr_argl[0];
+ memcpy(auth.dat, cl->req.mr_argv[0], auth.length);
+ auth.mbz = 0;
+
+ if ((status = krb_rd_req(&auth, MOIRA_SNAME, host,
+ cl->haddr.sin_addr.s_addr, &ad, "")))
+ {
+ status += ERROR_TABLE_BASE_krb;
+ client_reply(cl, status);
+ com_err(whoami, status, " (authentication failed)");
+ return;
+ }
+
+ if (!rcache)
+ {
+ rcache = xmalloc(sizeof(replay_cache));
+ memset(rcache, 0, sizeof(replay_cache));
+ }
+
+ /* scan replay cache */
+ for (rc = rcache->next; rc; rc = rc->next)
+ {
+ if (auth.length == rc->auth.length &&
+ !memcmp(&(auth.dat), &(rc->auth.dat), auth.length))
+ {
+ com_err(whoami, 0,
+ "Authenticator replay from %s using authenticator for %s",
+ inet_ntoa(cl->haddr.sin_addr),
+ mr_kname_unparse(ad.pname, ad.pinst, ad.prealm));
+ com_err(whoami, KE_RD_AP_REPEAT, " (authentication failed)");
+ client_reply(cl, KE_RD_AP_REPEAT);
+ return;
}
- (void) strcat(buf, "@");
- (void) strcat(buf, ad.prealm);
- if (cl->clname) free((char *)cl->clname);
-
- cl->clname = (char *)malloc((unsigned)(strlen(buf)+1));
- (void) strcpy(cl->clname, buf);
- if (log_flags & LOG_RES) {
- (void) sprintf(buf1, "Authenticated to %s", cl->clname);
- com_err(whoami, 0, buf1);
+ }
+
+ /* add new entry */
+ time(&now);
+ rcnew = xmalloc(sizeof(replay_cache));
+ memcpy(&(rcnew->auth), &auth, sizeof(KTEXT_ST));
+ rcnew->expires = now + 2 * CLOCK_SKEW;
+ rcnew->next = rcache->next;
+ rcache->next = rcnew;
+
+ /* clean cache */
+ for (rc = rcnew; rc->next; )
+ {
+ if (rc->next->expires < now)
+ {
+ rcnew = rc->next;
+ rc->next = rc->next->next;
+ free(rcnew);
}
+ else
+ rc = rc->next;
+ }
+
+ status = set_client(cl, mr_kname_unparse(ad.pname, ad.pinst, ad.prealm),
+ ad.pname, ad.pinst, ad.prealm);
+
+ strncpy(cl->entity, cl->req.mr_argv[1], sizeof(cl->entity) - 1);
+ cl->entity[sizeof(cl->entity) - 1] = 0;
+
+ memset(&ad, 0, sizeof(ad)); /* Clean up session key, etc. */
+
+ com_err(whoami, 0, "Auth to %s using %s, uid %d cid %d",
+ cl->clname, cl->entity, cl->users_id, cl->client_id);
+
+ if (status != MR_SUCCESS || cl->users_id != 0)
+ client_reply(cl, status);
+ else
+ client_reply(cl, MR_USER_AUTH);
+#else
+ client_reply(cl, MR_NO_KRB4);
+#endif
+}
+
+void do_proxy(client *cl)
+{
+ char name[ANAME_SZ] = "\0", inst[INST_SZ] = "\0", realm[REALM_SZ] = "\0";
+ char kname[MAX_K_NAME_SZ];
+
+ if (cl->proxy_id)
+ {
+ com_err(whoami, MR_PERM, "Cannot re-proxy");
+ client_reply(cl, MR_PERM);
+ return;
+ }
+
+ if (mr_kname_parse(name, inst, realm, cl->req.mr_argv[0]) != 0)
+ {
+ com_err(whoami, KE_KNAME_FMT, "while parsing proxy name %s",
+ cl->req.mr_argv);
+ client_reply(cl, KE_KNAME_FMT);
+ return;
+ }
+
+ if (!*realm)
+ {
+ strcpy(realm, krb_realm);
+ sprintf(kname, "%s@%s", cl->req.mr_argv[0], realm);
+ }
+ else
+ strcpy(kname, cl->req.mr_argv[0]);
+
+ if (find_member("LIST", proxy_acl, cl))
+ {
+ cl->proxy_id = cl->client_id;
+ set_client(cl, kname, name, inst, realm);
+ com_err(whoami, 0, "Proxy authentication as %s (uid %d cid %d) via %s",
+ kname, cl->users_id, cl->client_id, cl->req.mr_argv[1]);
+ client_reply(cl, MR_SUCCESS);
+ }
+ else
+ {
+ com_err(whoami, MR_PERM, "Proxy authentication denied");
+ client_reply(cl, MR_PERM);
+ }
+}
+
+static int set_client(client *cl, char *kname,
+ char *name, char *inst, char *realm)
+{
+ int ok;
+
+ strncpy(cl->clname, kname, sizeof(cl->clname));
+ cl->clname[sizeof(cl->clname) - 1] = '\0';
+
+ if ((!inst || inst[0] == 0) && !strcmp(realm, krb_realm))
+ ok = 1;
+ else
+ ok = 0;
+ /* this is in a separate function because it accesses the database */
+ return set_krb_mapping(cl->clname, name, ok, &cl->client_id, &cl->users_id);
+}
+
+void do_krb5_auth(client *cl)
+{
+ krb5_data auth;
+ krb5_auth_context auth_con = NULL;
+ krb5_principal server = NULL, client = NULL;
+ krb5_ticket *ticket;
+ char name[ANAME_SZ], inst[INST_SZ], realm[REALM_SZ];
+ int status;
+
+ ticket = NULL;
+
+ status = krb5_auth_con_init(context, &auth_con);
+ if (status)
+ {
+ client_reply(cl, status);
+ com_err(whoami, status, "(krb5 auth context init failed)");
+ goto out;
+ }
+
+ status = krb5_sname_to_principal(context, host, MOIRA_SNAME,
+ KRB5_NT_SRV_HST, &server);
+ if (status)
+ {
+ client_reply(cl, status);
+ com_err(whoami, status, "(krb5_sname_to_principal failed)");
+ goto out;
+ }
+
+ auth.length = cl->req.mr_argl[0];
+ auth.data = cl->req.mr_argv[0];
+
+ status = krb5_rd_req(context, &auth_con, &auth, server, NULL, NULL,
+ &ticket);
+ if (status)
+ {
+ client_reply(cl, status);
+ com_err(whoami, status, " (krb5 authentication failed)");
+ goto out;
+ }
+
+ status = krb5_copy_principal(context, ticket->enc_part2->client, &client);
+ if (status)
+ {
+ client_reply(cl, status);
+ com_err(whoami, status, " (krb5_copy_principal failed)");
+ goto out;
+ }
+
+ /* Always convert to krb4 style principal name for now. */
+ status = krb5_524_conv_principal(context, client, name, inst, realm);
+ if (status)
+ {
+ client_reply(cl, status);
+ com_err(whoami, status, " (krb5_524_conv_principal failed)");
+ goto out;
+ }
+ status = set_client(cl, mr_kname_unparse(name, inst, realm), name, inst,
+ realm);
+
+ strncpy(cl->entity, cl->req.mr_argv[1], sizeof(cl->entity) - 1);
+ cl->entity[sizeof(cl->entity) - 1] = 0;
+
+ com_err(whoami, 0, "krb5 auth to %s using %s, uid %d cid %d",
+ cl->clname, cl->entity, cl->users_id, cl->client_id);
+
+ if (status != MR_SUCCESS || cl->users_id != 0)
+ client_reply(cl, status);
+ else
+ client_reply(cl, MR_USER_AUTH);
+
+ out:
+ if (client)
+ krb5_free_principal(context, client);
+ if (server)
+ krb5_free_principal(context, server);
+ if (ticket)
+ krb5_free_ticket(context, ticket);
+ if (auth_con)
+ krb5_auth_con_free(context, auth_con);
+ return;
}
andersk / moira.git / blobdiff