src/server/config/acl.c

Wed, 10 Jul 2024 23:04:58 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Wed, 10 Jul 2024 23:04:58 +0200
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parent 490
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child 556
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permissions
-rw-r--r--

fix net_ssl_writev skipping bytes

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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 #include <string.h>
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32
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33 #include "acl.h"
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34 #include "logging.h"
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35
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36 ACLFile* load_acl_file(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 ACLFile *conf = malloc(sizeof(ACLFile));
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43 conf->parser.parse = acl_parse;
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44 conf->namedACLs = cxLinkedListCreate(cxDefaultAllocator, NULL, CX_STORE_POINTERS);
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45 conf->uriACLs = cxLinkedListCreate(cxDefaultAllocator, NULL, CX_STORE_POINTERS);
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46 conf->pathACLs = cxLinkedListCreate(cxDefaultAllocator, NULL, CX_STORE_POINTERS);
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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 free_acl_file(conf);
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51 return NULL;
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52 }
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53
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54 fclose(in);
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55
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56 return conf;
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57 }
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58
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59 void free_acl_file(ACLFile *conf) {
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60 //ucx_mempool_destroy(conf->parser.mp->pool);
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61 free(conf);
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62 }
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63
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64 int acl_parse(void *p, ConfigLine *begin, ConfigLine *end, cxmutstr line) {
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65 ACLFile *aclf = p;
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66 CxAllocator *mp = aclf->parser.mp;
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67
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68 if(cx_strprefix(cx_strcast(line), cx_str("ACL "))) {
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69 cxmutstr param = cx_strsubs_m(line, 4);
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70 ConfigParam *plist = cfg_param_list(param, mp);
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71 ACLConfig *acl = OBJ_NEW(mp, ACLConfig);
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72 acl->type.ptr = NULL;
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73 acl->authparam = NULL;
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74 acl->entries = NULL;
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75 aclf->cur = acl;
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76
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77 cxmutstr type = cfg_param_get(plist, cx_str("type"));
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78 cxmutstr name = cfg_param_get(plist, cx_str("name"));
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79 cxmutstr path = cfg_param_get(plist, cx_str("path"));
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80 cxmutstr uri = cfg_param_get(plist, cx_str("uri"));
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81
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82 if(name.ptr) {
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83 acl->id = name;
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84 cxListAdd(aclf->namedACLs, acl);
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85 } else if(path.ptr) {
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86 acl->id = path;
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87 cxListAdd(aclf->pathACLs, acl);
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88 } else if(uri.ptr) {
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89 acl->id = uri;
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90 cxListAdd(aclf->uriACLs, acl);
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91 }
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92
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93 if(type.ptr) {
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94 acl->type = type;
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95 }
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96 } else if(cx_strprefix(cx_strcast(line), cx_str("Authenticate "))) {
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97 cxmutstr param = cx_strsubs_m(line, 13);
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98 ConfigParam *plist = cfg_param_list(param, mp);
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99 aclf->cur->authparam = plist;
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100 } else {
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101 if(parse_ace(aclf, line)) {
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102 // TODO: error
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103 return 1;
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104 }
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105 }
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106
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107 return 0;
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108 }
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109
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110 #define ACE_MAX_TOKENS 2048
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111
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112 int parse_ace(ACLFile *f, cxmutstr line) {
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113 ACLConfig *cur = f->cur;
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114 CxAllocator *mp = f->parser.mp;
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115
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116 cxstring *tk = NULL;
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117 ssize_t tkn = cx_strsplit_a(mp, cx_strcast(line), cx_str(":"), ACE_MAX_TOKENS, &tk);
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118 if(!tk || tkn < 3) {
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119 ws_cfg_log(LOG_FAILURE, "parse_ace: to few tokens: %.*s", (int)line.length, line.ptr);
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120 return 1;
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121 }
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122
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123 ACEConfig *ace = OBJ_NEW(mp, ACEConfig);
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124 memset(ace, 0, sizeof(ACEConfig));
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125
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126 /*
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127 * first step: determine who is affected by this ace
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128 */
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129 int n = 0;
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130 cxstring s = tk[0];
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131
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132 if(!cx_strcmp(s, cx_str("user"))) {
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133 // next token is the user name
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134 s = tk[1];
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135 n++;
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136 ace->who = cx_strdup_a(mp, s);
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137 } else if(!cx_strcmp(s, cx_str("group"))) {
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138 // next token is the group name
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139 s = tk[1];
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140 n++;
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141 ace->who = cx_strdup_a(mp, s);
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142 ace->flags = ACLCFG_IDENTIFIER_GROUP;
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143 } else if(!cx_strcmp(s, cx_str("owner@"))) {
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144 ace->flags = ACLCFG_OWNER;
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145 } else if(!cx_strcmp(s, cx_str("group@"))) {
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146 ace->flags = ACLCFG_GROUP;
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147 } else if(!cx_strcmp(s, cx_str("everyone@"))) {
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148 ace->flags = ACLCFG_EVERYONE;
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149 } else {
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150 // you can specify only the user name in the ace
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151 ace->who = cx_strdup_a(mp, s);
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152 }
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153
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154 n++; //next token
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155
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156 /*
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157 * get the access mask
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158 */
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159
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160 if(n >= tkn) {
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161 // to few tokens
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162 ws_cfg_log(LOG_FAILURE, "parse_ace: ace incomplete");
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163 return 1;
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164 }
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165 s = tk[n];
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166
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167 cxstring *accessmask = NULL;
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168 ssize_t maskn = cx_strsplit_a(mp, s, cx_str(","), ACE_MAX_TOKENS, &accessmask);
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169 for(int i=0;i<maskn;i++) {
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170 cxstring access = accessmask[i];
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171 ace->access_mask = ace->access_mask | accstr2int(access);
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172 }
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173 cxFree(mp, accessmask);
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174 n++; // next token
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175
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176 /*
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177 * get flags (optional) and ace type
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178 */
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179
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180 int complete = 0;
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181 while(n < tkn) {
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182 s = tk[n];
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183 if(!cx_strcmp(s, cx_str("allow"))) {
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184 ace->type = ACLCFG_TYPE_ALLOWED;
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185 complete = 1;
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186 break;
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187 } else if(!cx_strcmp(s, cx_str("deny"))) {
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188 ace->type = ACLCFG_TYPE_DENIED;
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189 complete = 1;
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190 break;
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191 } else if(!cx_strcmp(s, cx_str("audit"))) {
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192 ace->type = ACLCFG_TYPE_AUDIT;
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193 complete = 1;
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194 break;
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195 } else if(!cx_strcmp(s, cx_str("alarm"))) {
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196 ace->type = ACLCFG_TYPE_ALARM;
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197 complete = 1;
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198 break;
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199 } else {
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200 // set flags
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201 cxstring *flags = NULL;
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202 ssize_t fln = cx_strsplit_a(mp, s, cx_str(","), ACE_MAX_TOKENS, &flags);
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203 for(int i=0;i<fln;i++) {
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204 cxstring flag = flags[i];
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205 if(!cx_strcmp(flag, cx_str("successful_access_flag"))) {
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206 ace->flags = ace->flags | ACLCFG_SUCCESSFUL_ACCESS_FLAG;
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207 } else if(!cx_strcmp(flag, cx_str("failed_access_flag"))) {
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208 ace->flags = ace->flags | ACLCFG_FAILED_ACCESS_ACE_FLAG;
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209 }
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210 // TODO: other flags
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211 }
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212 free(flags);
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213 }
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214 n++;
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215 }
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216
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217 if(!complete) {
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218 ws_cfg_log(LOG_FAILURE, "parse_ace: ace incomplete");
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219 return 1;
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220 }
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221
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222 CFG_ACE_ADD(&cur->entries, ace);
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223
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224 return 0;
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225 }
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226
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227 uint32_t accstr2int(cxstring access) {
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228 uint32_t val = 0;
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229 if(!cx_strcmp(access, cx_str("read"))) {
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230 val = ACLCFG_READ;
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231 } else if(!cx_strcmp(access, cx_str("write"))) {
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232 val = ACLCFG_WRITE;
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233 } else if(!cx_strcmp(access, cx_str("read_data"))) {
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234 val = ACLCFG_READ_DATA;
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235 } else if(!cx_strcmp(access, cx_str("write_data"))) {
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236 val = ACLCFG_WRITE_DATA;
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237 } else if(!cx_strcmp(access, cx_str("append"))) {
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238 val = ACLCFG_APPEND;
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239 } else if(!cx_strcmp(access, cx_str("add"))) {
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240 val = ACLCFG_ADD_FILE;
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241 } else if(!cx_strcmp(access, cx_str("add_file"))) {
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242 val = ACLCFG_ADD_FILE;
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243 } else if(!cx_strcmp(access, cx_str("add_subdirectory"))) {
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244 val = ACLCFG_ADD_SUBDIRECTORY;
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245 } else if(!cx_strcmp(access, cx_str("read_xattr"))) {
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246 val = ACLCFG_READ_XATTR;
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247 } else if(!cx_strcmp(access, cx_str("write_xattr"))) {
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248 val = ACLCFG_WRITE_XATTR;
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249 } else if(!cx_strcmp(access, cx_str("execute"))) {
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250 val = ACLCFG_EXECUTE;
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251 } else if(!cx_strcmp(access, cx_str("delete_child"))) {
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252 val = ACLCFG_DELETE_CHILD;
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253 } else if(!cx_strcmp(access, cx_str("delete"))) {
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254 val = ACLCFG_DELETE;
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255 } else if(!cx_strcmp(access, cx_str("read_attributes"))) {
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256 val = ACLCFG_READ_ATTRIBUTES;
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257 } else if(!cx_strcmp(access, cx_str("write_attributes"))) {
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258 val = ACLCFG_WRITE_ATTRIBUTES;
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259 } else if(!cx_strcmp(access, cx_str("list"))) {
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260 val = ACLCFG_LIST;
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261 } else if(!cx_strcmp(access, cx_str("read_acl"))) {
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262 val = ACLCFG_READ_ACL;
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263 } else if(!cx_strcmp(access, cx_str("write_acl"))) {
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264 val = ACLCFG_WRITE_ACL;
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265 } else if(!cx_strcmp(access, cx_str("write_owner"))) {
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266 val = ACLCFG_WRITE_OWNER;
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267 } else if(!cx_strcmp(access, cx_str("synchronize"))) {
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268 val = ACLCFG_SYNCHRONIZE;
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269 }
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270 return val;
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271 }

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