Wed, 02 Nov 2022 18:08:06 +0100
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) { |
141 | 60 | ucx_list_free_a(conf->parser.mp, conf->users); |
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61 | } |
91 | 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; |
91 | 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 |
91 | 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 | |
91 | 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); |
141 | 127 | if(ngroups > 0) { |
128 | entry->groups = mp->calloc(mp->pool, ngroups, sizeof(sstr_t)); | |
129 | entry->numgroups = ngroups; | |
130 | for(int i=0;i<ngroups;i++) { | |
131 | entry->groups[i] = sstrdup_a(mp, sstrtrim(groups[i])); | |
132 | free(groups[i].ptr); | |
133 | } | |
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 |
91 | 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 | } |