1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #if defined(LIBC_SCCS) && !defined(lint) 32 static char sccsid[] = "@(#)publickey.c 1.10 91/03/11 Copyr 1986 Sun Micro"; 33 #endif 34 #include <sys/cdefs.h> 35 /* 36 * publickey.c 37 * Copyright (C) 1986, Sun Microsystems, Inc. 38 */ 39 40 /* 41 * Public key lookup routines 42 */ 43 #include "namespace.h" 44 #include <stdio.h> 45 #include <pwd.h> 46 #include <rpc/rpc.h> 47 #include <rpc/key_prot.h> 48 #include <rpcsvc/yp_prot.h> 49 #include <rpcsvc/ypclnt.h> 50 #include <string.h> 51 #include <stdlib.h> 52 #include "un-namespace.h" 53 54 #define PKFILE "/etc/publickey" 55 56 /* 57 * Hack to let ypserv/rpc.nisd use AUTH_DES. 58 */ 59 int (*__getpublickey_LOCAL)(const char *, char *) = 0; 60 61 /* 62 * Get somebody's public key 63 */ 64 static int 65 __getpublickey_real(const char *netname, char *publickey) 66 { 67 char lookup[3 * HEXKEYBYTES]; 68 char *p; 69 70 if (publickey == NULL) 71 return (0); 72 if (!getpublicandprivatekey(netname, lookup)) 73 return (0); 74 p = strchr(lookup, ':'); 75 if (p == NULL) { 76 return (0); 77 } 78 *p = '\0'; 79 (void) strncpy(publickey, lookup, HEXKEYBYTES); 80 publickey[HEXKEYBYTES] = '\0'; 81 return (1); 82 } 83 84 /* 85 * reads the file /etc/publickey looking for a + to optionally go to the 86 * yellow pages 87 */ 88 89 int 90 getpublicandprivatekey(const char *key, char *ret) 91 { 92 char buf[1024]; /* big enough */ 93 char *res; 94 FILE *fd; 95 char *mkey; 96 char *mval; 97 98 fd = fopen(PKFILE, "r"); 99 if (fd == NULL) 100 return (0); 101 for (;;) { 102 res = fgets(buf, sizeof(buf), fd); 103 if (res == NULL) { 104 fclose(fd); 105 return (0); 106 } 107 if (res[0] == '#') 108 continue; 109 else if (res[0] == '+') { 110 #ifdef YP 111 char *PKMAP = "publickey.byname"; 112 char *lookup; 113 char *domain; 114 int err; 115 int len; 116 117 err = yp_get_default_domain(&domain); 118 if (err) { 119 continue; 120 } 121 lookup = NULL; 122 err = yp_match(domain, PKMAP, key, strlen(key), &lookup, &len); 123 if (err) { 124 #ifdef DEBUG 125 fprintf(stderr, "match failed error %d\n", err); 126 #endif 127 continue; 128 } 129 lookup[len] = 0; 130 strcpy(ret, lookup); 131 fclose(fd); 132 free(lookup); 133 return (2); 134 #else /* YP */ 135 #ifdef DEBUG 136 fprintf(stderr, 137 "Bad record in %s '+' -- NIS not supported in this library copy\n", PKFILE); 138 #endif /* DEBUG */ 139 continue; 140 #endif /* YP */ 141 } else { 142 mkey = strsep(&res, "\t "); 143 if (mkey == NULL) { 144 fprintf(stderr, 145 "Bad record in %s -- %s", PKFILE, buf); 146 continue; 147 } 148 do { 149 mval = strsep(&res, " \t#\n"); 150 } while (mval != NULL && !*mval); 151 if (mval == NULL) { 152 fprintf(stderr, 153 "Bad record in %s val problem - %s", PKFILE, buf); 154 continue; 155 } 156 if (strcmp(mkey, key) == 0) { 157 strcpy(ret, mval); 158 fclose(fd); 159 return (1); 160 } 161 } 162 } 163 } 164 165 int getpublickey(const char *netname, char *publickey) 166 { 167 if (__getpublickey_LOCAL != NULL) 168 return(__getpublickey_LOCAL(netname, publickey)); 169 else 170 return(__getpublickey_real(netname, publickey)); 171 } 172