diff options
Diffstat (limited to 'third_party/heimdal/appl/kf/kfd.c')
-rw-r--r-- | third_party/heimdal/appl/kf/kfd.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/third_party/heimdal/appl/kf/kfd.c b/third_party/heimdal/appl/kf/kfd.c new file mode 100644 index 0000000..9099bab --- /dev/null +++ b/third_party/heimdal/appl/kf/kfd.c @@ -0,0 +1,311 @@ +/* + * Copyright (c) 1997 - 2002 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "kf_locl.h" +RCSID("$Id$"); + +krb5_context context; +char krb5_tkfile[MAXPATHLEN]; + +static int help_flag; +static int version_flag; +static char *port_str; +char *service = KF_SERVICE; +int do_inetd = 0; +static char *regpag_str=NULL; + +static struct getargs args[] = { + { "port", 'p', arg_string, &port_str, "port to listen to", "port" }, + { "inetd",'i',arg_flag, &do_inetd, + "Not started from inetd", NULL }, + { "regpag",'R',arg_string,®pag_str,"path to regpag binary","regpag"}, + { "help", 'h', arg_flag, &help_flag, NULL, NULL }, + { "version", 0, arg_flag, &version_flag, NULL, NULL } +}; + +static int num_args = sizeof(args) / sizeof(args[0]); + +static void +usage(int code, struct getargs *inargs, int num_inargs) +{ + arg_printusage(inargs, num_inargs, NULL, ""); + exit(code); +} + +static int +server_setup(krb5_context *ctx, int argc, char **argv) +{ + int port = 0; + int local_argc; + + local_argc = krb5_program_setup(ctx, argc, argv, args, num_args, usage); + + if(help_flag) + (*usage)(0, args, num_args); + if(version_flag) { + print_version(NULL); + exit(0); + } + + if(port_str){ + struct servent *s = roken_getservbyname(port_str, "tcp"); + if(s) + port = s->s_port; + else { + char *ptr; + + port = strtol (port_str, &ptr, 10); + if (port == 0 && ptr == port_str) + errx (1, "Bad port `%s'", port_str); + port = htons(port); + } + } + + if (port == 0) + port = krb5_getportbyname (*ctx, KF_PORT_NAME, "tcp", KF_PORT_NUM); + + if(argv[local_argc] != NULL) + usage(1, args, num_args); + + return port; +} + +static int protocol_version; + +static krb5_boolean +kfd_match_version(const void *arg, const char *version) +{ + if(strcmp(version, KF_VERSION_1) == 0) { + protocol_version = 1; + return TRUE; + } else if (strlen(version) == 4 && + version[0] == '0' && + version[1] == '.' && + (version[2] == '4' || version[2] == '3') && + islower((unsigned char)version[3])) { + protocol_version = 0; + return TRUE; + } + return FALSE; +} + +static int +proto (int sock, const char *svc) +{ + krb5_auth_context auth_context; + krb5_error_code status; + krb5_principal server; + krb5_ticket *ticket; + char *name; + char ret_string[10]; + char hostname[MAXHOSTNAMELEN]; + krb5_data data; + krb5_data remotename; + krb5_data tk_file; + krb5_ccache ccache; + char ccname[MAXPATHLEN]; + struct passwd *pwd; + + status = krb5_auth_con_init (context, &auth_context); + if (status) + krb5_err(context, 1, status, "krb5_auth_con_init"); + + status = krb5_auth_con_setaddrs_from_fd (context, + auth_context, + &sock); + if (status) + krb5_err(context, 1, status, "krb5_auth_con_setaddr"); + + if(gethostname (hostname, sizeof(hostname)) < 0) + krb5_err(context, 1, errno, "gethostname"); + + status = krb5_sname_to_principal (context, + hostname, + svc, + KRB5_NT_SRV_HST, + &server); + if (status) + krb5_err(context, 1, status, "krb5_sname_to_principal"); + + status = krb5_recvauth_match_version (context, + &auth_context, + &sock, + kfd_match_version, + NULL, + server, + 0, + NULL, + &ticket); + if (status) + krb5_err(context, 1, status, "krb5_recvauth"); + + status = krb5_unparse_name (context, + ticket->client, + &name); + if (status) + krb5_err(context, 1, status, "krb5_unparse_name"); + + if(protocol_version == 0) { + data.data = "old clnt"; /* XXX old clients only had room for + 10 bytes of message, and also + didn't show it to the user */ + data.length = strlen(data.data) + 1; + krb5_write_message(context, &sock, &data); + sleep(2); /* XXX give client time to finish */ + krb5_errx(context, 1, "old client; exiting"); + } + + status=krb5_read_priv_message (context, auth_context, + &sock, &remotename); + if (status) + krb5_err(context, 1, status, "krb5_read_message"); + status=krb5_read_priv_message (context, auth_context, + &sock, &tk_file); + if (status) + krb5_err(context, 1, status, "krb5_read_message"); + + krb5_data_zero (&data); + + if(((char*)remotename.data)[remotename.length-1] != '\0') + krb5_errx(context, 1, "unterminated received"); + if(((char*)tk_file.data)[tk_file.length-1] != '\0') + krb5_errx(context, 1, "unterminated received"); + + status = krb5_read_priv_message(context, auth_context, &sock, &data); + + if (status) { + krb5_err(context, 1, errno, "krb5_read_priv_message"); + goto out; + } + + pwd = getpwnam ((char *)(remotename.data)); + if (pwd == NULL) { + status=1; + krb5_warnx(context, "getpwnam: %s failed",(char *)(remotename.data)); + goto out; + } + + if(!krb5_kuserok (context, + ticket->client, + (char *)(remotename.data))) { + status=1; + krb5_warnx(context, "krb5_kuserok: permission denied"); + goto out; + } + + if (setgid(pwd->pw_gid) < 0) { + krb5_warn(context, errno, "setgid"); + goto out; + } + if (setuid(pwd->pw_uid) < 0) { + krb5_warn(context, errno, "setuid"); + goto out; + } + + if (tk_file.length != 1) + snprintf (ccname, sizeof(ccname), "%s", (char *)(tk_file.data)); + else + snprintf (ccname, sizeof(ccname), "FILE:/tmp/krb5cc_%lu", + (unsigned long)pwd->pw_uid); + + status = krb5_cc_resolve (context, ccname, &ccache); + if (status) { + krb5_warn(context, status, "krb5_cc_resolve"); + goto out; + } + status = krb5_cc_initialize (context, ccache, ticket->client); + if (status) { + krb5_warn(context, status, "krb5_cc_initialize"); + goto out; + } + status = krb5_rd_cred2 (context, auth_context, ccache, &data); + krb5_cc_close (context, ccache); + if (status) { + krb5_warn(context, status, "krb5_rd_cred"); + goto out; + + } + strlcpy(krb5_tkfile,ccname,sizeof(krb5_tkfile)); + krb5_warnx(context, "%s forwarded ticket to %s,%s", + name, + (char *)(remotename.data),ccname); + out: + if (status) { + strlcpy(ret_string, "no", sizeof(ret_string)); + krb5_warnx(context, "failed"); + } else { + strlcpy(ret_string, "ok", sizeof(ret_string)); + } + + krb5_data_free (&tk_file); + krb5_data_free (&remotename); + krb5_data_free (&data); + free(name); + + data.data = ret_string; + data.length = strlen(ret_string) + 1; + status = krb5_write_priv_message(context, auth_context, &sock, &data); + krb5_auth_con_free(context, auth_context); + + return status; +} + +static int +doit (int port, const char *svc) +{ + if (do_inetd) + mini_inetd(port, NULL); + return proto (STDIN_FILENO, svc); +} + +int +main(int argc, char **argv) +{ + int port; + int ret; + krb5_log_facility *fac; + + setprogname (argv[0]); + roken_openlog (argv[0], LOG_ODELAY | LOG_PID,LOG_AUTH); + port = server_setup(&context, argc, argv); + ret = krb5_openlog(context, "kfd", &fac); + if(ret) krb5_err(context, 1, ret, "krb5_openlog"); + ret = krb5_set_warn_dest(context, fac); + if(ret) krb5_err(context, 1, ret, "krb5_set_warn_dest"); + + ret = doit (port, service); + closelog(); + if (ret == 0 && regpag_str != NULL) + ret = execl(regpag_str, "regpag", "-t", krb5_tkfile, "-r", NULL); + return ret; +} |