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 1.2.6.1 2000/09/20 04:43:11 jkh 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 <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 53 #define PKFILE "/etc/publickey" 54 55 /* 56 * Hack to let ypserv/rpc.nisd use AUTH_DES. 57 */ 58 int (*__getpublickey_LOCAL)() = 0; 59 60 /* 61 * Get somebody's public key 62 */ 63 int 64 __getpublickey_real(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 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(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 165 getpublickey(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