=================================================================== RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/Attic/auth-krb4.c,v retrieving revision 1.8 retrieving revision 1.9 diff -u -r1.8 -r1.9 --- src/usr.bin/ssh/Attic/auth-krb4.c 1999/11/15 00:42:00 1.8 +++ src/usr.bin/ssh/Attic/auth-krb4.c 1999/11/23 22:25:52 1.9 @@ -6,7 +6,7 @@ Kerberos v4 authentication and ticket-passing routines. - $Id: auth-krb4.c,v 1.8 1999/11/15 00:42:00 markus Exp $ + $Id: auth-krb4.c,v 1.9 1999/11/23 22:25:52 markus Exp $ */ #include "includes.h" @@ -20,216 +20,221 @@ void krb4_cleanup_proc(void *ignore) { - debug("krb4_cleanup_proc called"); - - if (ticket) { - (void) dest_tkt(); - xfree(ticket); - ticket = NULL; - } + debug("krb4_cleanup_proc called"); + if (ticket) { + (void) dest_tkt(); + xfree(ticket); + ticket = NULL; + } } -int krb4_init(uid_t uid) +int +krb4_init(uid_t uid) { - static int cleanup_registered = 0; - char *tkt_root = TKT_ROOT; - struct stat st; - int fd; + static int cleanup_registered = 0; + char *tkt_root = TKT_ROOT; + struct stat st; + int fd; - if (!ticket) { - /* Set unique ticket string manually since we're still root. */ - ticket = xmalloc(MAXPATHLEN); + if (!ticket) { + /* Set unique ticket string manually since we're still root. */ + ticket = xmalloc(MAXPATHLEN); #ifdef AFS - if (lstat("/ticket", &st) != -1) - tkt_root = "/ticket/"; + if (lstat("/ticket", &st) != -1) + tkt_root = "/ticket/"; #endif /* AFS */ - snprintf(ticket, MAXPATHLEN, "%s%d_%d", tkt_root, uid, getpid()); - (void) krb_set_tkt_string(ticket); - } - /* Register ticket cleanup in case of fatal error. */ - if (!cleanup_registered) { - fatal_add_cleanup(krb4_cleanup_proc, NULL); - cleanup_registered = 1; - } - /* Try to create our ticket file. */ - if ((fd = mkstemp(ticket)) != -1) { - close(fd); - return 1; - } - /* Ticket file exists - make sure user owns it (just passed ticket). */ - if (lstat(ticket, &st) != -1) { - if (st.st_mode == (S_IFREG|S_IRUSR|S_IWUSR) && st.st_uid == uid) - return 1; - } - /* Failure - cancel cleanup function, leaving bad ticket for inspection. */ - log("WARNING: bad ticket file %s", ticket); - fatal_remove_cleanup(krb4_cleanup_proc, NULL); - cleanup_registered = 0; - xfree(ticket); - ticket = NULL; - - return 0; + snprintf(ticket, MAXPATHLEN, "%s%d_%d", tkt_root, uid, getpid()); + (void) krb_set_tkt_string(ticket); + } + /* Register ticket cleanup in case of fatal error. */ + if (!cleanup_registered) { + fatal_add_cleanup(krb4_cleanup_proc, NULL); + cleanup_registered = 1; + } + /* Try to create our ticket file. */ + if ((fd = mkstemp(ticket)) != -1) { + close(fd); + return 1; + } + /* Ticket file exists - make sure user owns it (just passed ticket). */ + if (lstat(ticket, &st) != -1) { + if (st.st_mode == (S_IFREG | S_IRUSR | S_IWUSR) && + st.st_uid == uid) + return 1; + } + /* Failure - cancel cleanup function, leaving bad ticket for inspection. */ + log("WARNING: bad ticket file %s", ticket); + fatal_remove_cleanup(krb4_cleanup_proc, NULL); + cleanup_registered = 0; + xfree(ticket); + ticket = NULL; + + return 0; } -int auth_krb4(const char *server_user, KTEXT auth, char **client) +int +auth_krb4(const char *server_user, KTEXT auth, char **client) { - AUTH_DAT adat = { 0 }; - KTEXT_ST reply; - char instance[INST_SZ]; - int r, s; - u_int cksum; - Key_schedule schedule; - struct sockaddr_in local, foreign; - - s = packet_get_connection_in(); - - r = sizeof(local); - memset(&local, 0, sizeof(local)); - if (getsockname(s, (struct sockaddr *) &local, &r) < 0) - debug("getsockname failed: %.100s", strerror(errno)); - r = sizeof(foreign); - memset(&foreign, 0, sizeof(foreign)); - if (getpeername(s, (struct sockaddr *)&foreign, &r) < 0) { - debug("getpeername failed: %.100s", strerror(errno)); - fatal_cleanup(); - } - - instance[0] = '*'; instance[1] = 0; - - /* Get the encrypted request, challenge, and session key. */ - if ((r = krb_rd_req(auth, KRB4_SERVICE_NAME, instance, 0, &adat, ""))) { - packet_send_debug("Kerberos V4 krb_rd_req: %.100s", krb_err_txt[r]); - return 0; - } - des_key_sched((des_cblock *)adat.session, schedule); - - *client = xmalloc(MAX_K_NAME_SZ); - (void) snprintf(*client, MAX_K_NAME_SZ, "%s%s%s@%s", adat.pname, - *adat.pinst ? "." : "", adat.pinst, adat.prealm); + AUTH_DAT adat = {0}; + KTEXT_ST reply; + char instance[INST_SZ]; + int r, s; + u_int cksum; + Key_schedule schedule; + struct sockaddr_in local, foreign; - /* Check ~/.klogin authorization now. */ - if (kuserok(&adat, (char *)server_user) != KSUCCESS) { - packet_send_debug("Kerberos V4 .klogin authorization failed!"); - log("Kerberos V4 .klogin authorization failed for %s to account %s", - *client, server_user); - xfree(*client); - return 0; - } - /* Increment the checksum, and return it encrypted with the session key. */ - cksum = adat.checksum + 1; - cksum = htonl(cksum); - - /* If we can't successfully encrypt the checksum, we send back an empty - message, admitting our failure. */ - if ((r = krb_mk_priv((u_char *)&cksum, reply.dat, sizeof(cksum)+1, - schedule, &adat.session, &local, &foreign)) < 0) { - packet_send_debug("Kerberos V4 mk_priv: (%d) %s", r, krb_err_txt[r]); - reply.dat[0] = 0; - reply.length = 0; - } - else reply.length = r; - - /* Clear session key. */ - memset(&adat.session, 0, sizeof(&adat.session)); - - packet_start(SSH_SMSG_AUTH_KERBEROS_RESPONSE); - packet_put_string((char *) reply.dat, reply.length); - packet_send(); - packet_write_wait(); - return 1; + s = packet_get_connection_in(); + + r = sizeof(local); + memset(&local, 0, sizeof(local)); + if (getsockname(s, (struct sockaddr *) & local, &r) < 0) + debug("getsockname failed: %.100s", strerror(errno)); + r = sizeof(foreign); + memset(&foreign, 0, sizeof(foreign)); + if (getpeername(s, (struct sockaddr *) & foreign, &r) < 0) { + debug("getpeername failed: %.100s", strerror(errno)); + fatal_cleanup(); + } + instance[0] = '*'; + instance[1] = 0; + + /* Get the encrypted request, challenge, and session key. */ + if ((r = krb_rd_req(auth, KRB4_SERVICE_NAME, instance, 0, &adat, ""))) { + packet_send_debug("Kerberos V4 krb_rd_req: %.100s", krb_err_txt[r]); + return 0; + } + des_key_sched((des_cblock *) adat.session, schedule); + + *client = xmalloc(MAX_K_NAME_SZ); + (void) snprintf(*client, MAX_K_NAME_SZ, "%s%s%s@%s", adat.pname, + *adat.pinst ? "." : "", adat.pinst, adat.prealm); + + /* Check ~/.klogin authorization now. */ + if (kuserok(&adat, (char *) server_user) != KSUCCESS) { + packet_send_debug("Kerberos V4 .klogin authorization failed!"); + log("Kerberos V4 .klogin authorization failed for %s to account %s", + *client, server_user); + xfree(*client); + return 0; + } + /* Increment the checksum, and return it encrypted with the + session key. */ + cksum = adat.checksum + 1; + cksum = htonl(cksum); + + /* If we can't successfully encrypt the checksum, we send back an + empty message, admitting our failure. */ + if ((r = krb_mk_priv((u_char *) & cksum, reply.dat, sizeof(cksum) + 1, + schedule, &adat.session, &local, &foreign)) < 0) { + packet_send_debug("Kerberos V4 mk_priv: (%d) %s", r, krb_err_txt[r]); + reply.dat[0] = 0; + reply.length = 0; + } else + reply.length = r; + + /* Clear session key. */ + memset(&adat.session, 0, sizeof(&adat.session)); + + packet_start(SSH_SMSG_AUTH_KERBEROS_RESPONSE); + packet_put_string((char *) reply.dat, reply.length); + packet_send(); + packet_write_wait(); + return 1; } #endif /* KRB4 */ #ifdef AFS -int auth_kerberos_tgt(struct passwd *pw, const char *string) +int +auth_kerberos_tgt(struct passwd *pw, const char *string) { - CREDENTIALS creds; - - if (!radix_to_creds(string, &creds)) { - log("Protocol error decoding Kerberos V4 tgt"); - packet_send_debug("Protocol error decoding Kerberos V4 tgt"); - goto auth_kerberos_tgt_failure; - } - if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */ - strlcpy(creds.service, "krbtgt", sizeof creds.service); - - if (strcmp(creds.service, "krbtgt")) { - log("Kerberos V4 tgt (%s%s%s@%s) rejected for %s", creds.pname, - creds.pinst[0] ? "." : "", creds.pinst, creds.realm, pw->pw_name); - packet_send_debug("Kerberos V4 tgt (%s%s%s@%s) rejected for %s", - creds.pname, creds.pinst[0] ? "." : "", creds.pinst, - creds.realm, pw->pw_name); - goto auth_kerberos_tgt_failure; - } - if (!krb4_init(pw->pw_uid)) - goto auth_kerberos_tgt_failure; + CREDENTIALS creds; - if (in_tkt(creds.pname, creds.pinst) != KSUCCESS) - goto auth_kerberos_tgt_failure; - - if (save_credentials(creds.service, creds.instance, creds.realm, - creds.session, creds.lifetime, creds.kvno, - &creds.ticket_st, creds.issue_date) != KSUCCESS) { - packet_send_debug("Kerberos V4 tgt refused: couldn't save credentials"); - goto auth_kerberos_tgt_failure; - } - /* Successful authentication, passed all checks. */ - chown(tkt_string(), pw->pw_uid, pw->pw_gid); - - packet_send_debug("Kerberos V4 tgt accepted (%s.%s@%s, %s%s%s@%s)", - creds.service, creds.instance, creds.realm, creds.pname, - creds.pinst[0] ? "." : "", creds.pinst, creds.realm); - memset(&creds, 0, sizeof(creds)); - packet_start(SSH_SMSG_SUCCESS); - packet_send(); - packet_write_wait(); - return 1; - - auth_kerberos_tgt_failure: - krb4_cleanup_proc(NULL); - memset(&creds, 0, sizeof(creds)); - packet_start(SSH_SMSG_FAILURE); - packet_send(); - packet_write_wait(); - return 0; + if (!radix_to_creds(string, &creds)) { + log("Protocol error decoding Kerberos V4 tgt"); + packet_send_debug("Protocol error decoding Kerberos V4 tgt"); + goto auth_kerberos_tgt_failure; + } + if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */ + strlcpy(creds.service, "krbtgt", sizeof creds.service); + + if (strcmp(creds.service, "krbtgt")) { + log("Kerberos V4 tgt (%s%s%s@%s) rejected for %s", creds.pname, + creds.pinst[0] ? "." : "", creds.pinst, creds.realm, pw->pw_name); + packet_send_debug("Kerberos V4 tgt (%s%s%s@%s) rejected for %s", + creds.pname, creds.pinst[0] ? "." : "", creds.pinst, + creds.realm, pw->pw_name); + goto auth_kerberos_tgt_failure; + } + if (!krb4_init(pw->pw_uid)) + goto auth_kerberos_tgt_failure; + + if (in_tkt(creds.pname, creds.pinst) != KSUCCESS) + goto auth_kerberos_tgt_failure; + + if (save_credentials(creds.service, creds.instance, creds.realm, + creds.session, creds.lifetime, creds.kvno, + &creds.ticket_st, creds.issue_date) != KSUCCESS) { + packet_send_debug("Kerberos V4 tgt refused: couldn't save credentials"); + goto auth_kerberos_tgt_failure; + } + /* Successful authentication, passed all checks. */ + chown(tkt_string(), pw->pw_uid, pw->pw_gid); + + packet_send_debug("Kerberos V4 tgt accepted (%s.%s@%s, %s%s%s@%s)", + creds.service, creds.instance, creds.realm, creds.pname, + creds.pinst[0] ? "." : "", creds.pinst, creds.realm); + memset(&creds, 0, sizeof(creds)); + packet_start(SSH_SMSG_SUCCESS); + packet_send(); + packet_write_wait(); + return 1; + +auth_kerberos_tgt_failure: + krb4_cleanup_proc(NULL); + memset(&creds, 0, sizeof(creds)); + packet_start(SSH_SMSG_FAILURE); + packet_send(); + packet_write_wait(); + return 0; } -int auth_afs_token(struct passwd *pw, const char *token_string) +int +auth_afs_token(struct passwd *pw, const char *token_string) { - CREDENTIALS creds; - uid_t uid = pw->pw_uid; + CREDENTIALS creds; + uid_t uid = pw->pw_uid; - if (!radix_to_creds(token_string, &creds)) { - log("Protocol error decoding AFS token"); - packet_send_debug("Protocol error decoding AFS token"); - packet_start(SSH_SMSG_FAILURE); - packet_send(); - packet_write_wait(); - return 0; - } - if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */ - strlcpy(creds.service, "afs", sizeof creds.service); - - if (strncmp(creds.pname, "AFS ID ", 7) == 0) - uid = atoi(creds.pname + 7); - - if (kafs_settoken(creds.realm, uid, &creds)) { - log("AFS token (%s@%s) rejected for %s", creds.pname, creds.realm, - pw->pw_name); - packet_send_debug("AFS token (%s@%s) rejected for %s", creds.pname, - creds.realm, pw->pw_name); - memset(&creds, 0, sizeof(creds)); - packet_start(SSH_SMSG_FAILURE); - packet_send(); - packet_write_wait(); - return 0; - } - packet_send_debug("AFS token accepted (%s@%s, %s@%s)", creds.service, - creds.realm, creds.pname, creds.realm); - memset(&creds, 0, sizeof(creds)); - packet_start(SSH_SMSG_SUCCESS); - packet_send(); - packet_write_wait(); - return 1; + if (!radix_to_creds(token_string, &creds)) { + log("Protocol error decoding AFS token"); + packet_send_debug("Protocol error decoding AFS token"); + packet_start(SSH_SMSG_FAILURE); + packet_send(); + packet_write_wait(); + return 0; + } + if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */ + strlcpy(creds.service, "afs", sizeof creds.service); + + if (strncmp(creds.pname, "AFS ID ", 7) == 0) + uid = atoi(creds.pname + 7); + + if (kafs_settoken(creds.realm, uid, &creds)) { + log("AFS token (%s@%s) rejected for %s", creds.pname, creds.realm, + pw->pw_name); + packet_send_debug("AFS token (%s@%s) rejected for %s", creds.pname, + creds.realm, pw->pw_name); + memset(&creds, 0, sizeof(creds)); + packet_start(SSH_SMSG_FAILURE); + packet_send(); + packet_write_wait(); + return 0; + } + packet_send_debug("AFS token accepted (%s@%s, %s@%s)", creds.service, + creds.realm, creds.pname, creds.realm); + memset(&creds, 0, sizeof(creds)); + packet_start(SSH_SMSG_SUCCESS); + packet_send(); + packet_write_wait(); + return 1; } #endif /* AFS */