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