src/server/config/keyfile.c

Wed, 02 Nov 2022 18:08:06 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Wed, 02 Nov 2022 18:08:06 +0100
changeset 410
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parent 255
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child 415
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permissions
-rw-r--r--

improve error handling in basic_run_session

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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 KeyfileConfig *load_keyfile_config(const char *file) {
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35 FILE *in = fopen(file, "r");
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36 if(in == NULL) {
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37 return NULL;
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38 }
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39
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40 KeyfileConfig *conf = malloc(sizeof(KeyfileConfig));
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41 conf->parser.parse = keyfile_parse;
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42 conf->file = strdup(file);
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43 conf->users = NULL;
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44
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45 int r = cfg_parse_basic_file((ConfigParser*)conf, in);
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46 if(r != 0) {
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47 fclose(in);
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48 free(conf);
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49 // TODO: free
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50 return NULL;
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51 }
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52
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53 fclose(in);
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54
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55 return conf;
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56 }
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57
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58 void free_keyfile_config(KeyfileConfig *conf) {
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59 if(conf->users) {
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60 ucx_list_free_a(conf->parser.mp, conf->users);
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61 }
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62 ucx_mempool_destroy(conf->parser.mp->pool);
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63 free(conf);
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64 }
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65
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66 int keyfile_parse(void *p, ConfigLine *begin, ConfigLine *end, sstr_t line) {
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67 KeyfileConfig *conf = p;
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68 UcxAllocator *mp = conf->parser.mp;
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69
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70 ssize_t tkn = 0;
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71 sstr_t *tk = sstrsplit(line, sstrn(";", 1), &tkn);
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72
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73 if(tkn < 2) {
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74 return 1;
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75 }
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76
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77 KeyfileEntry *entry = OBJ_NEW(mp, KeyfileEntry);
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78 entry->groups = NULL;
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79 entry->numgroups = 0;
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80
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81 // get user name
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82 entry->name = sstrdup_a(mp, tk[0]);
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83
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84 // get hash
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85 sstr_t hash = sstrtrim(tk[1]);
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86 if(hash.length < 4) {
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87 // to short
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88 return 1;
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89 }
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90 if(hash.ptr[0] != '{') {
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91 // missing hash type specification
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92 return 1;
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93 }
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94
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95 // get hash type and data
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96 sstr_t hash_type;
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97 sstr_t hash_data;
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98 for(int i=1;i<hash.length;i++) {
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99 if(hash.ptr[i] == '}') {
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100 hash_type = sstrsubsl(hash, 1, i-1);
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101 hash_data = sstrsubs(hash, i+1);
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102 }
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103 }
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104
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105 if(!sstrcmp(hash_type, sstr("SSHA"))) {
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106 entry->hashtype = KEYFILE_SSHA;
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107 } else if(!sstrcmp(hash_type, sstr("SSHA256"))) {
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108 entry->hashtype = KEYFILE_SSHA256;
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109 } else if(!sstrcmp(hash_type, sstr("SSHA512"))) {
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110 entry->hashtype = KEYFILE_SSHA512;
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111 } else {
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112 // unkown hash type
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113 log_ereport(
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114 LOG_FAILURE,
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115 "keyfile_parse: unknown hash type: %s",
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116 sstrdup_a(mp, hash_type).ptr);
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117 return 1;
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118 }
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119
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120 entry->hashdata = sstrdup_a(mp, hash_data);
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121
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122 // get groups
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123 if(tkn == 3) {
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124 sstr_t groups_str = sstrtrim(tk[2]);
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125 ssize_t ngroups = 0;
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126 sstr_t *groups = sstrsplit(groups_str, sstrn(",", 1), &ngroups);
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127 if(ngroups > 0) {
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128 entry->groups = mp->calloc(mp->pool, ngroups, sizeof(sstr_t));
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129 entry->numgroups = ngroups;
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130 for(int i=0;i<ngroups;i++) {
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131 entry->groups[i] = sstrdup_a(mp, sstrtrim(groups[i]));
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132 free(groups[i].ptr);
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133 }
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134 free(groups);
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135 }
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136 }
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137
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138 // add user
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139 conf->users = ucx_list_append_a(mp, conf->users, entry);
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140
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141 // free tokens
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142 for(int i=0;i<tkn;i++) {
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143 free(tk[i].ptr);
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144 }
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145 free(tk);
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146
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147 return 0;
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148 }

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