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 * 32 * @(#)publickey.c 1.10 91/03/11 Copyr 1986 Sun Micro 33 */ 34 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)() = NULL; 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 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 166 getpublickey(const char *netname, char *publickey) 167 { 168 if (__getpublickey_LOCAL != NULL) 169 return(__getpublickey_LOCAL(netname, publickey)); 170 else 171 return(__getpublickey_real(netname, publickey)); 172 } 173