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 1.2 2003/06/17 04:26:44 dillon 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(netname, publickey) 65 char *netname; 66 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 (void) 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(key, ret) 92 char *key; 93 char *ret; 94 { 95 char buf[1024]; /* big enough */ 96 char *res; 97 FILE *fd; 98 char *mkey; 99 char *mval; 100 101 fd = fopen(PKFILE, "r"); 102 if (fd == NULL) 103 return (0); 104 for (;;) { 105 res = fgets(buf, sizeof(buf), fd); 106 if (res == NULL) { 107 fclose(fd); 108 return (0); 109 } 110 if (res[0] == '#') 111 continue; 112 else if (res[0] == '+') { 113 #ifdef YP 114 char *PKMAP = "publickey.byname"; 115 char *lookup; 116 char *domain; 117 int err; 118 int len; 119 120 err = yp_get_default_domain(&domain); 121 if (err) { 122 continue; 123 } 124 lookup = NULL; 125 err = yp_match(domain, PKMAP, key, strlen(key), &lookup, &len); 126 if (err) { 127 #ifdef DEBUG 128 fprintf(stderr, "match failed error %d\n", err); 129 #endif 130 continue; 131 } 132 lookup[len] = 0; 133 strcpy(ret, lookup); 134 fclose(fd); 135 free(lookup); 136 return (2); 137 #else /* YP */ 138 #ifdef DEBUG 139 fprintf(stderr, 140 "Bad record in %s '+' -- NIS not supported in this library copy\n", PKFILE); 141 #endif /* DEBUG */ 142 continue; 143 #endif /* YP */ 144 } else { 145 mkey = strsep(&res, "\t "); 146 if (mkey == NULL) { 147 fprintf(stderr, 148 "Bad record in %s -- %s", PKFILE, buf); 149 continue; 150 } 151 do { 152 mval = strsep(&res, " \t#\n"); 153 } while (mval != NULL && !*mval); 154 if (mval == NULL) { 155 fprintf(stderr, 156 "Bad record in %s val problem - %s", PKFILE, buf); 157 continue; 158 } 159 if (strcmp(mkey, key) == 0) { 160 strcpy(ret, mval); 161 fclose(fd); 162 return (1); 163 } 164 } 165 } 166 } 167 168 int getpublickey(netname, publickey) 169 char *netname; 170 char *publickey; 171 { 172 if (__getpublickey_LOCAL != NULL) 173 return(__getpublickey_LOCAL(netname, publickey)); 174 else 175 return(__getpublickey_real(netname, publickey)); 176 } 177