src/server/config/keyfile.c

Sun, 06 Nov 2022 15:53:32 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 06 Nov 2022 15:53:32 +0100
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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31
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32 #include "keyfile.h"
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33
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34 #define KEYFILE_MAX_TOKENS 4096
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35
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36 KeyfileConfig *load_keyfile_config(const char *file) {
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37 FILE *in = fopen(file, "r");
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38 if(in == NULL) {
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39 return NULL;
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40 }
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41
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42 KeyfileConfig *conf = malloc(sizeof(KeyfileConfig));
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43 conf->parser.parse = keyfile_parse;
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44 conf->file = strdup(file);
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45 conf->users_begin = NULL;
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46 conf->users_end = NULL;
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47
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48 int r = cfg_parse_basic_file((ConfigParser*)conf, in);
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49 if(r != 0) {
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50 fclose(in);
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51 free(conf);
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52 // TODO: free
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53 return NULL;
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54 }
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55
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56 fclose(in);
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57
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58 return conf;
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59 }
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60
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61 void free_keyfile_config(KeyfileConfig *conf) {
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62 /*
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63 if(conf->users) {
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64 ucx_list_free_a(conf->parser.mp, conf->users);
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65 }
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66 ucx_mempool_destroy(conf->parser.mp->pool);
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67 */
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68 free(conf);
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69 }
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70
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71 int keyfile_parse(void *p, ConfigLine *begin, ConfigLine *end, cxmutstr line) {
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72 KeyfileConfig *conf = p;
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73 CxAllocator *mp = conf->parser.mp;
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74
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75 cxstring *tk = NULL;
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76 ssize_t tkn = cx_strsplit_a(mp, cx_strcast(line), cx_strn(";", 1), KEYFILE_MAX_TOKENS, &tk);
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77
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78 if(tkn < 2) {
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79 return 1;
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80 }
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81
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82 KeyfileEntry *entry = OBJ_NEW(mp, KeyfileEntry);
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83 ZERO(entry, sizeof(KeyfileEntry));
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84
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85 // get user name
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86 entry->name = cx_strdup_a(mp, tk[0]);
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87
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88 // get hash
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89 cxstring hash = cx_strtrim(tk[1]);
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90 if(hash.length < 4) {
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91 // to short
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92 return 1;
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93 }
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94 if(hash.ptr[0] != '{') {
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95 // missing hash type specification
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96 return 1;
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97 }
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98
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99 // get hash type and data
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100 cxstring hash_type;
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101 cxstring hash_data;
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102 for(int i=1;i<hash.length;i++) {
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103 if(hash.ptr[i] == '}') {
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104 hash_type = cx_strsubsl(hash, 1, i-1);
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105 hash_data = cx_strsubs(hash, i+1);
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106 }
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107 }
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108
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109 if(!cx_strcmp(hash_type, cx_str("SSHA"))) {
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110 entry->hashtype = KEYFILE_SSHA;
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111 } else if(!cx_strcmp(hash_type, cx_str("SSHA256"))) {
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112 entry->hashtype = KEYFILE_SSHA256;
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113 } else if(!cx_strcmp(hash_type, cx_str("SSHA512"))) {
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114 entry->hashtype = KEYFILE_SSHA512;
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115 } else {
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116 // unkown hash type
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117 log_ereport(
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118 LOG_FAILURE,
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119 "keyfile_parse: unknown hash type: %s",
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120 cx_strdup_a(mp, hash_type).ptr);
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121 return 1;
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122 }
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123
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124 entry->hashdata = cx_strdup_a(mp, hash_data);
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125
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126 // get groups
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127 if(tkn == 3) {
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128 cxstring groups_str = cx_strtrim(tk[2]);
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129 cxstring *groups = NULL;
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130 ssize_t ngroups = cx_strsplit_a(mp, groups_str, cx_strn(",", 1), KEYFILE_MAX_TOKENS, &groups);
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131 if(ngroups > 0) {
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132 entry->groups = cxCalloc(mp, ngroups, sizeof(cxmutstr));
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133 entry->numgroups = ngroups;
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134 for(int i=0;i<ngroups;i++) {
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135 entry->groups[i] = cx_strdup_a(mp, cx_strtrim(groups[i]));
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136 }
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137 cxFree(mp, groups);
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138 }
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139 }
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140
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141 // add user
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142 CFG_KEYFILE_ADD(&conf->users_begin, &conf->users_end, entry);
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143
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144 // free tokens
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145 cxFree(mp, tk);
62
c47e081b6c0f added keyfile based authentication
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
146
c47e081b6c0f added keyfile based authentication
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
147 return 0;
c47e081b6c0f added keyfile based authentication
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
148 }

mercurial