3 * Handle server side of authentication
5 * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology
6 * For copying and distribution information, please see the file
11 #include <mit-copyright.h>
12 #include "mr_server.h"
14 #include <sys/types.h>
16 #include <arpa/inet.h>
17 #include <netinet/in.h>
24 extern char *whoami, *host;
26 typedef struct _replay_cache {
29 struct _replay_cache *next;
32 replay_cache *rcache = NULL;
35 * Handle a MOIRA_AUTH RPC request.
37 * argv[0] is a kerberos authenticator. Decompose it, and if
38 * successful, store the name the user authenticated to in
42 void do_auth(client *cl)
47 replay_cache *rc, *rcnew;
50 auth.length = cl->args->mr_argl[0];
51 memcpy(auth.dat, cl->args->mr_argv[0], auth.length);
54 if ((status = krb_rd_req (&auth, MOIRA_SNAME, host,
55 cl->haddr.sin_addr.s_addr, &ad, "")))
57 status += ERROR_TABLE_BASE_krb;
58 cl->reply.mr_status = status;
59 if (log_flags & LOG_RES)
60 com_err(whoami, status, " (authentication failed)");
66 rcache = malloc(sizeof(replay_cache));
67 memset(rcache, 0, sizeof(replay_cache));
70 /* scan replay cache */
71 for (rc = rcache->next; rc; rc = rc->next)
73 if (auth.length == rc->auth.length &&
74 !memcmp(&(auth.dat), &(rc->auth.dat), auth.length))
77 "Authenticator replay from %s using authenticator for %s",
78 inet_ntoa(cl->haddr.sin_addr),
79 kname_unparse(ad.pname, ad.pinst, ad.prealm));
80 com_err(whoami, KE_RD_AP_REPEAT, " (authentication failed)");
81 cl->reply.mr_status = KE_RD_AP_REPEAT;
88 rcnew = malloc(sizeof(replay_cache));
89 memcpy(&(rcnew->auth), &auth, sizeof(KTEXT_ST));
90 rcnew->expires = now + 2 * CLOCK_SKEW;
91 rcnew->next = rcache->next;
95 for (rc = rcnew; rc->next; )
97 if (rc->next->expires < now)
100 rc->next = rc->next->next;
107 memcpy(cl->kname.name, ad.pname, ANAME_SZ);
108 memcpy(cl->kname.inst, ad.pinst, INST_SZ);
109 memcpy(cl->kname.realm, ad.prealm, REALM_SZ);
110 strcpy(cl->clname, kname_unparse(ad.pname, ad.pinst, ad.prealm));
112 if (ad.pinst[0] == 0 && !strcmp(ad.prealm, krb_realm))
116 /* this is in a separate function because it accesses the database */
117 status = set_krb_mapping(cl->clname, ad.pname, ok,
118 &cl->client_id, &cl->users_id);
120 if (cl->args->mr_version_no == MR_VERSION_2)
122 strncpy(cl->entity, cl->args->mr_argv[1], 8);
126 strcpy(cl->entity, "???");
127 memset(&ad, 0, sizeof(ad)); /* Clean up session key, etc. */
129 if (log_flags & LOG_RES)
131 com_err(whoami, 0, "Auth to %s using %s, uid %d cid %d",
132 cl->clname, cl->entity, cl->users_id, cl->client_id);
134 if (status != MR_SUCCESS)
135 cl->reply.mr_status = status;
136 else if (cl->users_id == 0)
137 cl->reply.mr_status = MR_USER_AUTH;