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 /* 35 * publickey.c 36 * Copyright (C) 1986, Sun Microsystems, Inc. 37 */ 38 39 /* 40 * Public key lookup routines 41 */ 42 #include "namespace.h" 43 #include <stdio.h> 44 #include <pwd.h> 45 #include <rpc/rpc.h> 46 #include <rpc/key_prot.h> 47 #include <rpcsvc/yp_prot.h> 48 #include <rpcsvc/ypclnt.h> 49 #include <string.h> 50 #include <stdlib.h> 51 #include "un-namespace.h" 52 53 #define PKFILE "/etc/publickey" 54 55 /* 56 * Hack to let ypserv/rpc.nisd use AUTH_DES. 57 */ 58 int (*__getpublickey_LOCAL)(const char *, char *) = 0; 59 60 /* 61 * Get somebody's public key 62 */ 63 static int 64 __getpublickey_real(const char *netname, char *publickey) 65 { 66 char lookup[3 * HEXKEYBYTES]; 67 char *p; 68 69 if (publickey == NULL) 70 return (0); 71 if (!getpublicandprivatekey(netname, lookup)) 72 return (0); 73 p = strchr(lookup, ':'); 74 if (p == NULL) { 75 return (0); 76 } 77 *p = '\0'; 78 (void) strncpy(publickey, lookup, HEXKEYBYTES); 79 publickey[HEXKEYBYTES] = '\0'; 80 return (1); 81 } 82 83 /* 84 * reads the file /etc/publickey looking for a + to optionally go to the 85 * yellow pages 86 */ 87 88 int 89 getpublicandprivatekey(const char *key, char *ret) 90 { 91 char buf[1024]; /* big enough */ 92 char *res; 93 FILE *fd; 94 char *mkey; 95 char *mval; 96 97 fd = fopen(PKFILE, "r"); 98 if (fd == NULL) 99 return (0); 100 for (;;) { 101 res = fgets(buf, sizeof(buf), fd); 102 if (res == NULL) { 103 fclose(fd); 104 return (0); 105 } 106 if (res[0] == '#') 107 continue; 108 else if (res[0] == '+') { 109 #ifdef YP 110 char *PKMAP = "publickey.byname"; 111 char *lookup; 112 char *domain; 113 int err; 114 int len; 115 116 err = yp_get_default_domain(&domain); 117 if (err) { 118 continue; 119 } 120 lookup = NULL; 121 err = yp_match(domain, PKMAP, key, strlen(key), &lookup, &len); 122 if (err) { 123 #ifdef DEBUG 124 fprintf(stderr, "match failed error %d\n", err); 125 #endif 126 continue; 127 } 128 lookup[len] = 0; 129 strcpy(ret, lookup); 130 fclose(fd); 131 free(lookup); 132 return (2); 133 #else /* YP */ 134 #ifdef DEBUG 135 fprintf(stderr, 136 "Bad record in %s '+' -- NIS not supported in this library copy\n", PKFILE); 137 #endif /* DEBUG */ 138 continue; 139 #endif /* YP */ 140 } else { 141 mkey = strsep(&res, "\t "); 142 if (mkey == NULL) { 143 fprintf(stderr, 144 "Bad record in %s -- %s", PKFILE, buf); 145 continue; 146 } 147 do { 148 mval = strsep(&res, " \t#\n"); 149 } while (mval != NULL && !*mval); 150 if (mval == NULL) { 151 fprintf(stderr, 152 "Bad record in %s val problem - %s", PKFILE, buf); 153 continue; 154 } 155 if (strcmp(mkey, key) == 0) { 156 strcpy(ret, mval); 157 fclose(fd); 158 return (1); 159 } 160 } 161 } 162 } 163 164 int getpublickey(const char *netname, char *publickey) 165 { 166 if (__getpublickey_LOCAL != NULL) 167 return(__getpublickey_LOCAL(netname, publickey)); 168 else 169 return(__getpublickey_real(netname, publickey)); 170 } 171