Sun, 15 Sep 2024 09:47:36 +0200
improve sessionhandler trace logging
51 | 1 | /* |
2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
3 | * | |
4 | * Copyright 2013 Olaf Wintermann. All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions are met: | |
8 | * | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * | |
16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
26 | * POSSIBILITY OF SUCH DAMAGE. | |
27 | */ | |
28 | ||
29 | #include <stdio.h> | |
30 | #include <stdlib.h> | |
91 | 31 | #include <string.h> |
51 | 32 | |
33 | #include "acl.h" | |
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34 | #include "logging.h" |
51 | 35 | |
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36 | ACLFile* load_acl_file(const char *file) { |
51 | 37 | FILE *in = fopen(file, "r"); |
38 | if(in == NULL) { | |
39 | return NULL; | |
40 | } | |
41 | ||
42 | ACLFile *conf = malloc(sizeof(ACLFile)); | |
43 | conf->parser.parse = acl_parse; | |
490 | 44 | conf->namedACLs = cxLinkedListCreate(cxDefaultAllocator, NULL, CX_STORE_POINTERS); |
45 | conf->uriACLs = cxLinkedListCreate(cxDefaultAllocator, NULL, CX_STORE_POINTERS); | |
46 | conf->pathACLs = cxLinkedListCreate(cxDefaultAllocator, NULL, CX_STORE_POINTERS); | |
51 | 47 | |
48 | int r = cfg_parse_basic_file((ConfigParser*)conf, in); | |
49 | if(r != 0) { | |
50 | free_acl_file(conf); | |
51 | return NULL; | |
52 | } | |
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53 | |
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54 | fclose(in); |
51 | 55 | |
56 | return conf; | |
57 | } | |
58 | ||
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59 | void free_acl_file(ACLFile *conf) { |
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60 | cxListDestroy(conf->namedACLs); |
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61 | cxListDestroy(conf->uriACLs); |
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62 | cxListDestroy(conf->pathACLs); |
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63 | cxMempoolDestroy(conf->parser.mp->data); // TODO: is there a better way to access the mempool? |
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64 | free(conf); |
51 | 65 | } |
66 | ||
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67 | int acl_parse(void *p, ConfigLine *begin, ConfigLine *end, cxmutstr line) { |
51 | 68 | ACLFile *aclf = p; |
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69 | CxAllocator *mp = aclf->parser.mp; |
51 | 70 | |
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71 | if(cx_strprefix(cx_strcast(line), cx_str("ACL "))) { |
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72 | cxmutstr param = cx_strsubs_m(line, 4); |
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73 | ConfigParam *plist = cfg_param_list(param, mp); |
51 | 74 | ACLConfig *acl = OBJ_NEW(mp, ACLConfig); |
75 | acl->type.ptr = NULL; | |
76 | acl->authparam = NULL; | |
77 | acl->entries = NULL; | |
78 | aclf->cur = acl; | |
79 | ||
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80 | cxmutstr type = cfg_param_get(plist, cx_str("type")); |
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81 | cxmutstr name = cfg_param_get(plist, cx_str("name")); |
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82 | cxmutstr path = cfg_param_get(plist, cx_str("path")); |
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83 | cxmutstr uri = cfg_param_get(plist, cx_str("uri")); |
51 | 84 | |
85 | if(name.ptr) { | |
86 | acl->id = name; | |
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87 | cxListAdd(aclf->namedACLs, acl); |
51 | 88 | } else if(path.ptr) { |
89 | acl->id = path; | |
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90 | cxListAdd(aclf->pathACLs, acl); |
51 | 91 | } else if(uri.ptr) { |
92 | acl->id = uri; | |
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93 | cxListAdd(aclf->uriACLs, acl); |
51 | 94 | } |
95 | ||
96 | if(type.ptr) { | |
97 | acl->type = type; | |
98 | } | |
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99 | } else if(cx_strprefix(cx_strcast(line), cx_str("Authenticate "))) { |
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100 | cxmutstr param = cx_strsubs_m(line, 13); |
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101 | ConfigParam *plist = cfg_param_list(param, mp); |
51 | 102 | aclf->cur->authparam = plist; |
103 | } else { | |
104 | if(parse_ace(aclf, line)) { | |
105 | // TODO: error | |
106 | return 1; | |
107 | } | |
108 | } | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
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113 | #define ACE_MAX_TOKENS 2048 |
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114 | |
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115 | int parse_ace(ACLFile *f, cxmutstr line) { |
51 | 116 | ACLConfig *cur = f->cur; |
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117 | CxAllocator *mp = f->parser.mp; |
51 | 118 | |
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119 | cxstring *tk = NULL; |
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120 | ssize_t tkn = cx_strsplit_a(mp, cx_strcast(line), cx_str(":"), ACE_MAX_TOKENS, &tk); |
51 | 121 | if(!tk || tkn < 3) { |
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122 | ws_cfg_log(LOG_FAILURE, "parse_ace: to few tokens: %.*s", (int)line.length, line.ptr); |
51 | 123 | return 1; |
124 | } | |
125 | ||
126 | ACEConfig *ace = OBJ_NEW(mp, ACEConfig); | |
127 | memset(ace, 0, sizeof(ACEConfig)); | |
128 | ||
129 | /* | |
130 | * first step: determine who is affected by this ace | |
131 | */ | |
132 | int n = 0; | |
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133 | cxstring s = tk[0]; |
51 | 134 | |
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135 | if(!cx_strcmp(s, cx_str("user"))) { |
51 | 136 | // next token is the user name |
137 | s = tk[1]; | |
138 | n++; | |
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139 | ace->who = cx_strdup_a(mp, s); |
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140 | } else if(!cx_strcmp(s, cx_str("group"))) { |
51 | 141 | // next token is the group name |
142 | s = tk[1]; | |
143 | n++; | |
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144 | ace->who = cx_strdup_a(mp, s); |
51 | 145 | ace->flags = ACLCFG_IDENTIFIER_GROUP; |
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146 | } else if(!cx_strcmp(s, cx_str("owner@"))) { |
51 | 147 | ace->flags = ACLCFG_OWNER; |
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148 | } else if(!cx_strcmp(s, cx_str("group@"))) { |
51 | 149 | ace->flags = ACLCFG_GROUP; |
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150 | } else if(!cx_strcmp(s, cx_str("everyone@"))) { |
51 | 151 | ace->flags = ACLCFG_EVERYONE; |
152 | } else { | |
153 | // you can specify only the user name in the ace | |
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154 | ace->who = cx_strdup_a(mp, s); |
51 | 155 | } |
156 | ||
157 | n++; //next token | |
158 | ||
159 | /* | |
160 | * get the access mask | |
161 | */ | |
162 | ||
163 | if(n >= tkn) { | |
164 | // to few tokens | |
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165 | ws_cfg_log(LOG_FAILURE, "parse_ace: ace incomplete"); |
51 | 166 | return 1; |
167 | } | |
168 | s = tk[n]; | |
169 | ||
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170 | cxstring *accessmask = NULL; |
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171 | ssize_t maskn = cx_strsplit_a(mp, s, cx_str(","), ACE_MAX_TOKENS, &accessmask); |
51 | 172 | for(int i=0;i<maskn;i++) { |
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173 | cxstring access = accessmask[i]; |
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174 | ace->access_mask = ace->access_mask | accstr2int(access); |
51 | 175 | } |
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176 | cxFree(mp, accessmask); |
51 | 177 | n++; // next token |
178 | ||
179 | /* | |
180 | * get flags (optional) and ace type | |
181 | */ | |
182 | ||
183 | int complete = 0; | |
184 | while(n < tkn) { | |
185 | s = tk[n]; | |
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186 | if(!cx_strcmp(s, cx_str("allow"))) { |
51 | 187 | ace->type = ACLCFG_TYPE_ALLOWED; |
188 | complete = 1; | |
189 | break; | |
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190 | } else if(!cx_strcmp(s, cx_str("deny"))) { |
51 | 191 | ace->type = ACLCFG_TYPE_DENIED; |
192 | complete = 1; | |
193 | break; | |
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194 | } else if(!cx_strcmp(s, cx_str("audit"))) { |
51 | 195 | ace->type = ACLCFG_TYPE_AUDIT; |
196 | complete = 1; | |
197 | break; | |
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198 | } else if(!cx_strcmp(s, cx_str("alarm"))) { |
51 | 199 | ace->type = ACLCFG_TYPE_ALARM; |
200 | complete = 1; | |
201 | break; | |
202 | } else { | |
203 | // set flags | |
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204 | cxstring *flags = NULL; |
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205 | ssize_t fln = cx_strsplit_a(mp, s, cx_str(","), ACE_MAX_TOKENS, &flags); |
51 | 206 | for(int i=0;i<fln;i++) { |
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207 | cxstring flag = flags[i]; |
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208 | if(!cx_strcmp(flag, cx_str("successful_access_flag"))) { |
51 | 209 | ace->flags = ace->flags | ACLCFG_SUCCESSFUL_ACCESS_FLAG; |
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210 | } else if(!cx_strcmp(flag, cx_str("failed_access_flag"))) { |
51 | 211 | ace->flags = ace->flags | ACLCFG_FAILED_ACCESS_ACE_FLAG; |
212 | } | |
213 | // TODO: other flags | |
214 | } | |
215 | free(flags); | |
216 | } | |
217 | n++; | |
218 | } | |
219 | ||
220 | if(!complete) { | |
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221 | ws_cfg_log(LOG_FAILURE, "parse_ace: ace incomplete"); |
51 | 222 | return 1; |
223 | } | |
224 | ||
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225 | CFG_ACE_ADD(&cur->entries, ace); |
51 | 226 | |
227 | return 0; | |
228 | } | |
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229 | |
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230 | uint32_t accstr2int(cxstring access) { |
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231 | uint32_t val = 0; |
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232 | if(!cx_strcmp(access, cx_str("read"))) { |
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233 | val = ACLCFG_READ; |
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234 | } else if(!cx_strcmp(access, cx_str("write"))) { |
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235 | val = ACLCFG_WRITE; |
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236 | } else if(!cx_strcmp(access, cx_str("read_data"))) { |
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237 | val = ACLCFG_READ_DATA; |
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238 | } else if(!cx_strcmp(access, cx_str("write_data"))) { |
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239 | val = ACLCFG_WRITE_DATA; |
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240 | } else if(!cx_strcmp(access, cx_str("append"))) { |
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241 | val = ACLCFG_APPEND; |
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242 | } else if(!cx_strcmp(access, cx_str("add"))) { |
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243 | val = ACLCFG_ADD_FILE; |
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244 | } else if(!cx_strcmp(access, cx_str("add_file"))) { |
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245 | val = ACLCFG_ADD_FILE; |
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246 | } else if(!cx_strcmp(access, cx_str("add_subdirectory"))) { |
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247 | val = ACLCFG_ADD_SUBDIRECTORY; |
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248 | } else if(!cx_strcmp(access, cx_str("read_xattr"))) { |
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249 | val = ACLCFG_READ_XATTR; |
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250 | } else if(!cx_strcmp(access, cx_str("write_xattr"))) { |
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251 | val = ACLCFG_WRITE_XATTR; |
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252 | } else if(!cx_strcmp(access, cx_str("execute"))) { |
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253 | val = ACLCFG_EXECUTE; |
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254 | } else if(!cx_strcmp(access, cx_str("delete_child"))) { |
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255 | val = ACLCFG_DELETE_CHILD; |
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256 | } else if(!cx_strcmp(access, cx_str("delete"))) { |
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257 | val = ACLCFG_DELETE; |
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258 | } else if(!cx_strcmp(access, cx_str("read_attributes"))) { |
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259 | val = ACLCFG_READ_ATTRIBUTES; |
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260 | } else if(!cx_strcmp(access, cx_str("write_attributes"))) { |
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261 | val = ACLCFG_WRITE_ATTRIBUTES; |
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262 | } else if(!cx_strcmp(access, cx_str("list"))) { |
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263 | val = ACLCFG_LIST; |
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264 | } else if(!cx_strcmp(access, cx_str("read_acl"))) { |
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265 | val = ACLCFG_READ_ACL; |
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266 | } else if(!cx_strcmp(access, cx_str("write_acl"))) { |
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267 | val = ACLCFG_WRITE_ACL; |
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268 | } else if(!cx_strcmp(access, cx_str("write_owner"))) { |
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269 | val = ACLCFG_WRITE_OWNER; |
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270 | } else if(!cx_strcmp(access, cx_str("synchronize"))) { |
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271 | val = ACLCFG_SYNCHRONIZE; |
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272 | } |
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273 | return val; |
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274 | } |