1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user or with the express written consent of 8 * Sun Microsystems, Inc. 9 * 10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 13 * 14 * Sun RPC is provided with no support and without any obligation on the 15 * part of Sun Microsystems, Inc. to assist in its use, correction, 16 * modification or enhancement. 17 * 18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 20 * OR ANY PART THEREOF. 21 * 22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 23 * or profits or other special, indirect and consequential damages, even if 24 * Sun has been advised of the possibility of such damages. 25 * 26 * Sun Microsystems, Inc. 27 * 2550 Garcia Avenue 28 * Mountain View, California 94043 29 * 30 * $FreeBSD: src/lib/libc/rpc/getpublickey.c,v 1.9 2006/02/28 16:02:26 deischen Exp $ 31 * $DragonFly: src/lib/libc/rpc/getpublickey.c,v 1.3 2005/11/13 12:27:04 swildner Exp $ 32 * 33 * @(#)publickey.c 1.10 91/03/11 Copyr 1986 Sun Micro 34 */ 35 36 /* 37 * publickey.c 38 * Copyright (C) 1986, Sun Microsystems, Inc. 39 */ 40 41 /* 42 * Public key lookup routines 43 */ 44 #include "namespace.h" 45 #include <stdio.h> 46 #include <pwd.h> 47 #include <rpc/rpc.h> 48 #include <rpc/key_prot.h> 49 #include <rpcsvc/yp_prot.h> 50 #include <rpcsvc/ypclnt.h> 51 #include <string.h> 52 #include <stdlib.h> 53 #include "un-namespace.h" 54 55 #define PKFILE "/etc/publickey" 56 57 /* 58 * Hack to let ypserv/rpc.nisd use AUTH_DES. 59 */ 60 int (*__getpublickey_LOCAL)() = 0; 61 62 /* 63 * Get somebody's public key 64 */ 65 static int 66 __getpublickey_real(const char *netname, char *publickey) 67 { 68 char lookup[3 * HEXKEYBYTES]; 69 char *p; 70 71 if (publickey == NULL) 72 return (0); 73 if (!getpublicandprivatekey(netname, lookup)) 74 return (0); 75 p = strchr(lookup, ':'); 76 if (p == NULL) { 77 return (0); 78 } 79 *p = '\0'; 80 strncpy(publickey, lookup, HEXKEYBYTES); 81 publickey[HEXKEYBYTES] = '\0'; 82 return (1); 83 } 84 85 /* 86 * reads the file /etc/publickey looking for a + to optionally go to the 87 * yellow pages 88 */ 89 90 int 91 getpublicandprivatekey(const char *key, char *ret) 92 { 93 char buf[1024]; /* big enough */ 94 char *res; 95 FILE *fd; 96 char *mkey; 97 char *mval; 98 99 fd = fopen(PKFILE, "r"); 100 if (fd == NULL) 101 return (0); 102 for (;;) { 103 res = fgets(buf, sizeof(buf), fd); 104 if (res == NULL) { 105 fclose(fd); 106 return (0); 107 } 108 if (res[0] == '#') 109 continue; 110 else if (res[0] == '+') { 111 #ifdef YP 112 char *PKMAP = "publickey.byname"; 113 char *lookup; 114 char *domain; 115 int err; 116 int len; 117 118 err = yp_get_default_domain(&domain); 119 if (err) { 120 continue; 121 } 122 lookup = NULL; 123 err = yp_match(domain, PKMAP, key, strlen(key), &lookup, &len); 124 if (err) { 125 #ifdef DEBUG 126 fprintf(stderr, "match failed error %d\n", err); 127 #endif 128 continue; 129 } 130 lookup[len] = 0; 131 strcpy(ret, lookup); 132 fclose(fd); 133 free(lookup); 134 return (2); 135 #else /* YP */ 136 #ifdef DEBUG 137 fprintf(stderr, 138 "Bad record in %s '+' -- NIS not supported in this library copy\n", PKFILE); 139 #endif /* DEBUG */ 140 continue; 141 #endif /* YP */ 142 } else { 143 mkey = strsep(&res, "\t "); 144 if (mkey == NULL) { 145 fprintf(stderr, 146 "Bad record in %s -- %s", PKFILE, buf); 147 continue; 148 } 149 do { 150 mval = strsep(&res, " \t#\n"); 151 } while (mval != NULL && !*mval); 152 if (mval == NULL) { 153 fprintf(stderr, 154 "Bad record in %s val problem - %s", PKFILE, buf); 155 continue; 156 } 157 if (strcmp(mkey, key) == 0) { 158 strcpy(ret, mval); 159 fclose(fd); 160 return (1); 161 } 162 } 163 } 164 } 165 166 int 167 getpublickey(const char *netname, char *publickey) 168 { 169 if (__getpublickey_LOCAL != NULL) 170 return(__getpublickey_LOCAL(netname, publickey)); 171 else 172 return(__getpublickey_real(netname, publickey)); 173 } 174