/* $NetBSD: spx.c,v 1.7 2005/04/19 03:19:46 christos Exp $ */ /*- * Copyright (c) 1992, 1993 * The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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 #ifndef lint #if 0 static char sccsid[] = "@(#)spx.c 8.2 (Berkeley) 5/30/95"; #else __RCSID("$NetBSD: spx.c,v 1.7 2005/04/19 03:19:46 christos Exp $"); #endif #endif /* not lint */ #ifdef SPX /* * COPYRIGHT (C) 1990 DIGITAL EQUIPMENT CORPORATION * ALL RIGHTS RESERVED * * "Digital Equipment Corporation authorizes the reproduction, * distribution and modification of this software subject to the following * restrictions: * * 1. Any partial or whole copy of this software, or any modification * thereof, must include this copyright notice in its entirety. * * 2. This software is supplied "as is" with no warranty of any kind, * expressed or implied, for any purpose, including any warranty of fitness * or merchantibility. DIGITAL assumes no responsibility for the use or * reliability of this software, nor promises to provide any form of * support for it on any basis. * * 3. Distribution of this software is authorized only if no profit or * remuneration of any kind is received in exchange for such distribution. * * 4. This software produces public key authentication certificates * bearing an expiration date established by DIGITAL and RSA Data * Security, Inc. It may cease to generate certificates after the expiration * date. Any modification of this software that changes or defeats * the expiration date or its effect is unauthorized. * * 5. Software that will renew or extend the expiration date of * authentication certificates produced by this software may be obtained * from RSA Data Security, Inc., 10 Twin Dolphin Drive, Redwood City, CA * 94065, (415)595-8782, or from DIGITAL" * */ #include #include #include #include "gssapi_defs.h" #include #ifdef NO_STRING_H #include #else #include #endif #include #include "encrypt.h" #include "auth.h" #include "misc.h" extern auth_debug_mode; static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0, AUTHTYPE_SPX, }; static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION, TELQUAL_NAME, }; #define SPX_AUTH 0 /* Authentication data follows */ #define SPX_REJECT 1 /* Rejected (reason might follow) */ #define SPX_ACCEPT 2 /* Accepted */ #ifdef ENCRYPTION static Block session_key = { 0 }; #endif /* ENCRYPTION */ static Schedule sched; static Block challenge = { 0 }; /*******************************************************************/ gss_OID_set actual_mechs; gss_OID actual_mech_type, output_name_type; int major_status, status, msg_ctx = 0, new_status; int req_flags = 0, ret_flags, lifetime_rec; gss_cred_id_t gss_cred_handle; gss_ctx_id_t actual_ctxhandle, context_handle; gss_buffer_desc output_token, input_token, input_name_buffer; gss_buffer_desc status_string; gss_name_t desired_targname, src_name; gss_channel_bindings input_chan_bindings; char lhostname[GSS_C_MAX_PRINTABLE_NAME]; char targ_printable[GSS_C_MAX_PRINTABLE_NAME]; int to_addr=0, from_addr=0; char *address; gss_buffer_desc fullname_buffer; gss_OID fullname_type; gss_cred_id_t gss_delegated_cred_handle; /*******************************************************************/ static int Data(ap, type, d, c) Authenticator *ap; int type; void *d; int c; { unsigned char *p = str_data + 4; unsigned char *cd = (unsigned char *)d; if (c == -1) c = strlen((char *)cd); if (0) { printf("%s:%d: [%d] (%d)", str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY", str_data[3], type, c); printd(d, c); printf("\r\n"); } *p++ = ap->type; *p++ = ap->way; *p++ = type; while (c-- > 0) { if ((*p++ = *cd++) == IAC) *p++ = IAC; } *p++ = IAC; *p++ = SE; if (str_data[3] == TELQUAL_IS) printsub('>', &str_data[2], p - (&str_data[2])); return(telnet_net_write(str_data, p - str_data)); } int spx_init(ap, server) Authenticator *ap; int server; { gss_cred_id_t tmp_cred_handle; if (server) { str_data[3] = TELQUAL_REPLY; gethostname(lhostname, sizeof(lhostname)); strlcpy(targ_printable, "SERVICE:rcmd@", sizeof(targ_printable)); strlcat(targ_printable, lhostname, sizeof(targ_printable)); input_name_buffer.length = strlen(targ_printable); input_name_buffer.value = targ_printable; major_status = gss_import_name(&status, &input_name_buffer, GSS_C_NULL_OID, &desired_targname); major_status = gss_acquire_cred(&status, desired_targname, 0, GSS_C_NULL_OID_SET, GSS_C_ACCEPT, &tmp_cred_handle, &actual_mechs, &lifetime_rec); if (major_status != GSS_S_COMPLETE) return(0); } else { str_data[3] = TELQUAL_IS; } return(1); } int spx_send(ap) Authenticator *ap; { Block enckey; int r; gss_OID actual_mech_type, output_name_type; int msg_ctx = 0, new_status, status; int req_flags = 0, ret_flags, lifetime_rec, major_status; gss_buffer_desc output_token, input_token, input_name_buffer; gss_buffer_desc output_name_buffer, status_string; gss_name_t desired_targname; gss_channel_bindings input_chan_bindings; char targ_printable[GSS_C_MAX_PRINTABLE_NAME]; int from_addr=0, to_addr=0, myhostlen, j; int deleg_flag=1, mutual_flag=0, replay_flag=0, seq_flag=0; char *address; printf("[ Trying SPX ... ]\n"); strlcpy(targ_printable, "SERVICE:rcmd@", sizeof(targ_printable)); strlcat(targ_printable, RemoteHostName, sizeof(targ_printable)); input_name_buffer.length = strlen(targ_printable); input_name_buffer.value = targ_printable; if (!UserNameRequested) { return(0); } major_status = gss_import_name(&status, &input_name_buffer, GSS_C_NULL_OID, &desired_targname); major_status = gss_display_name(&status, desired_targname, &output_name_buffer, &output_name_type); printf("target is '%s'\n", output_name_buffer.value); fflush(stdout); major_status = gss_release_buffer(&status, &output_name_buffer); input_chan_bindings = (gss_channel_bindings) malloc(sizeof(gss_channel_bindings_desc)); input_chan_bindings->initiator_addrtype = GSS_C_AF_INET; input_chan_bindings->initiator_address.length = 4; address = (char *) malloc(4); input_chan_bindings->initiator_address.value = (char *) address; address[0] = ((from_addr & 0xff000000) >> 24); address[1] = ((from_addr & 0xff0000) >> 16); address[2] = ((from_addr & 0xff00) >> 8); address[3] = (from_addr & 0xff); input_chan_bindings->acceptor_addrtype = GSS_C_AF_INET; input_chan_bindings->acceptor_address.length = 4; address = (char *) malloc(4); input_chan_bindings->acceptor_address.value = (char *) address; address[0] = ((to_addr & 0xff000000) >> 24); address[1] = ((to_addr & 0xff0000) >> 16); address[2] = ((to_addr & 0xff00) >> 8); address[3] = (to_addr & 0xff); input_chan_bindings->application_data.length = 0; req_flags = 0; if (deleg_flag) req_flags = req_flags | 1; if (mutual_flag) req_flags = req_flags | 2; if (replay_flag) req_flags = req_flags | 4; if (seq_flag) req_flags = req_flags | 8; major_status = gss_init_sec_context(&status, /* minor status */ GSS_C_NO_CREDENTIAL, /* cred handle */ &actual_ctxhandle, /* ctx handle */ desired_targname, /* target name */ GSS_C_NULL_OID, /* mech type */ req_flags, /* req flags */ 0, /* time req */ input_chan_bindings, /* chan binding */ GSS_C_NO_BUFFER, /* input token */ &actual_mech_type, /* actual mech */ &output_token, /* output token */ &ret_flags, /* ret flags */ &lifetime_rec); /* time rec */ if ((major_status != GSS_S_COMPLETE) && (major_status != GSS_S_CONTINUE_NEEDED)) { gss_display_status(&new_status, status, GSS_C_MECH_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string); printf("%s\n", status_string.value); return(0); } if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) { return(0); } if (!Data(ap, SPX_AUTH, (void *)output_token.value, output_token.length)) { return(0); } return(1); } void spx_is(ap, data, cnt) Authenticator *ap; unsigned char *data; int cnt; { Session_Key skey; Block datablock; int r; if (cnt-- < 1) return; switch (*data++) { case SPX_AUTH: input_token.length = cnt; input_token.value = (char *) data; gethostname(lhostname, sizeof(lhostname)); strlcpy(targ_printable, "SERVICE:rcmd@", sizeof(targ_printable)); strlcat(targ_printable, lhostname, sizeof(targ_printable)); input_name_buffer.length = strlen(targ_printable); input_name_buffer.value = targ_printable; major_status = gss_import_name(&status, &input_name_buffer, GSS_C_NULL_OID, &desired_targname); major_status = gss_acquire_cred(&status, desired_targname, 0, GSS_C_NULL_OID_SET, GSS_C_ACCEPT, &gss_cred_handle, &actual_mechs, &lifetime_rec); major_status = gss_release_name(&status, desired_targname); input_chan_bindings = (gss_channel_bindings) malloc(sizeof(gss_channel_bindings_desc)); input_chan_bindings->initiator_addrtype = GSS_C_AF_INET; input_chan_bindings->initiator_address.length = 4; address = (char *) malloc(4); input_chan_bindings->initiator_address.value = (char *) address; address[0] = ((from_addr & 0xff000000) >> 24); address[1] = ((from_addr & 0xff0000) >> 16); address[2] = ((from_addr & 0xff00) >> 8); address[3] = (from_addr & 0xff); input_chan_bindings->acceptor_addrtype = GSS_C_AF_INET; input_chan_bindings->acceptor_address.length = 4; address = (char *) malloc(4); input_chan_bindings->acceptor_address.value = (char *) address; address[0] = ((to_addr & 0xff000000) >> 24); address[1] = ((to_addr & 0xff0000) >> 16); address[2] = ((to_addr & 0xff00) >> 8); address[3] = (to_addr & 0xff); input_chan_bindings->application_data.length = 0; major_status = gss_accept_sec_context(&status, &context_handle, gss_cred_handle, &input_token, input_chan_bindings, &src_name, &actual_mech_type, &output_token, &ret_flags, &lifetime_rec, &gss_delegated_cred_handle); if (major_status != GSS_S_COMPLETE) { major_status = gss_display_name(&status, src_name, &fullname_buffer, &fullname_type); Data(ap, SPX_REJECT, (void *)"auth failed", -1); auth_finished(ap, AUTH_REJECT); return; } major_status = gss_display_name(&status, src_name, &fullname_buffer, &fullname_type); Data(ap, SPX_ACCEPT, (void *)output_token.value, output_token.length); auth_finished(ap, AUTH_USER); break; default: Data(ap, SPX_REJECT, 0, 0); break; } } void spx_reply(ap, data, cnt) Authenticator *ap; unsigned char *data; int cnt; { Session_Key skey; if (cnt-- < 1) return; switch (*data++) { case SPX_REJECT: if (cnt > 0) { printf("[ SPX refuses authentication because %.*s ]\r\n", cnt, data); } else printf("[ SPX refuses authentication ]\r\n"); auth_send_retry(); return; case SPX_ACCEPT: printf("[ SPX accepts you ]\n"); if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) { /* * Send over the encrypted challenge. */ input_token.value = (char *) data; input_token.length = cnt; major_status = gss_init_sec_context(&status, /* minor stat */ GSS_C_NO_CREDENTIAL, /* cred handle */ &actual_ctxhandle, /* ctx handle */ desired_targname, /* target name */ GSS_C_NULL_OID, /* mech type */ req_flags, /* req flags */ 0, /* time req */ input_chan_bindings, /* chan binding */ &input_token, /* input token */ &actual_mech_type, /* actual mech */ &output_token, /* output token */ &ret_flags, /* ret flags */ &lifetime_rec); /* time rec */ if (major_status != GSS_S_COMPLETE) { gss_display_status(&new_status, status, GSS_C_MECH_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string); printf("[ SPX mutual response fails ... '%s' ]\r\n", status_string.value); auth_send_retry(); return; } } auth_finished(ap, AUTH_USER); return; default: return; } } int spx_status(ap, name, l, level) Authenticator *ap; char *name; size_t l; int level; { gss_buffer_desc fullname_buffer, acl_file_buffer; gss_OID fullname_type; char acl_file[160], fullname[160]; int major_status, status = 0; struct passwd pws, *pwd; char pwbuf[1024]; /* * hard code fullname to * "SPX:/C=US/O=Digital/OU=LKG/OU=Sphinx/OU=Users/CN=Kannan Alagappan" * and acl_file to "~kannan/.sphinx" */ if (getpwnam_r(UserNameRequested, &pws, pwbuf, sizeof(pwbuf), &pwd) != 0 || pwd == NULL) { return(AUTH_USER); /* not authenticated */ } strlcpy(acl_file, pwd->pw_dir, sizeof(acl_file)); strlcat(acl_file, "/.sphinx", sizeof(acl_file)); acl_file_buffer.value = acl_file; acl_file_buffer.length = strlen(acl_file); major_status = gss_display_name(&status, src_name, &fullname_buffer, &fullname_type); if (level < AUTH_USER) return(level); major_status = gss__check_acl(&status, &fullname_buffer, &acl_file_buffer); if (major_status == GSS_S_COMPLETE) { strlcpy(name, UserNameRequested, l); return(AUTH_VALID); } else { return(AUTH_USER); } } #define BUMP(buf, len) while (*(buf)) {++(buf), --(len);} #define ADDC(buf, len, c) if ((len) > 0) {*(buf)++ = (c); --(len);} void spx_printsub(data, cnt, buf, buflen) unsigned char *data, *buf; int cnt, buflen; { char lbuf[32]; register int i; buf[buflen-1] = '\0'; /* make sure its NULL terminated */ buflen -= 1; switch(data[3]) { case SPX_REJECT: /* Rejected (reason might follow) */ strncpy((char *)buf, " REJECT ", buflen); goto common; case SPX_ACCEPT: /* Accepted (name might follow) */ strncpy((char *)buf, " ACCEPT ", buflen); common: BUMP(buf, buflen); if (cnt <= 4) break; ADDC(buf, buflen, '"'); for (i = 4; i < cnt; i++) ADDC(buf, buflen, data[i]); ADDC(buf, buflen, '"'); ADDC(buf, buflen, '\0'); break; case SPX_AUTH: /* Authentication data follows */ strncpy((char *)buf, " AUTH", buflen); goto common2; default: snprintf(lbuf, sizeof(lbuf), " %d (unknown)", data[3]); strncpy((char *)buf, lbuf, buflen); common2: BUMP(buf, buflen); for (i = 4; i < cnt; i++) { snprintf(lbuf, sizeof(lbuf), " %d", data[i]); strncpy((char *)buf, lbuf, buflen); BUMP(buf, buflen); } break; } } #endif #ifdef notdef prkey(msg, key) char *msg; unsigned char *key; { register int i; printf("%s:", msg); for (i = 0; i < 8; i++) printf(" %3d", key[i]); printf("\r\n"); } #endif