src/server/daemon/acl.c

Sun, 01 May 2022 10:48:20 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 01 May 2022 10:48:20 +0200
branch
webdav
changeset 319
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parent 261
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child 415
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permissions
-rw-r--r--

add WebdavNSList <-> string converting functions

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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 <unistd.h>
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32
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33 #include "../util/util.h"
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34 #include "../util/pool.h"
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35 #include "../util/pblock.h"
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36 #include "../safs/auth.h"
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37 #include "log.h"
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38 #include "acl.h"
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39
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40 #define AUTH_TYPE_BASIC "basic"
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41
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42 void acllist_createhandle(Session *sn, Request *rq) {
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43 ACLListHandle *handle = pool_malloc(sn->pool, sizeof(ACLListHandle));
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44 handle->defaultauthdb = NULL;
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45 handle->listhead = NULL;
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46 handle->listtail = NULL;
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47 rq->acllist = handle;
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48 }
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49
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50 /*
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51 * append or prepend an ACL
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52 */
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53 void acllist_add(Session *sn, Request *rq, ACLList *acl, int append) {
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54 if(!rq->acllist) {
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55 acllist_createhandle(sn, rq);
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56 }
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57 ACLListHandle *list = rq->acllist;
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58
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59 if(!list->defaultauthdb && acl->authdb) {
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60 list->defaultauthdb = acl->authdb;
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61 }
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62
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63 ACLListElm *elm = pool_malloc(sn->pool, sizeof(ACLListElm));
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64 elm->acl = acl;
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65 elm->next = NULL;
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66 if(list->listhead == NULL) {
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67 list->listhead = elm;
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68 list->listtail = elm;
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69 } else {
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70 if(append) {
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71 list->listtail->next = elm;
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72 list->listtail = elm;
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73 } else {
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74 elm->next = list->listhead;
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75 list->listhead = elm;
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76 }
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77 }
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78 }
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79
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80 void acllist_append(Session *sn, Request *rq, ACLList *acl) {
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81 acllist_add(sn, rq, acl, 1);
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82 }
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83
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84 void acllist_prepend(Session *sn, Request *rq, ACLList *acl) {
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85 acllist_add(sn, rq, acl, 0);
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86 }
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87
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88 uint32_t acl_oflag2mask(int oflags) {
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89 /* TODO:
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90 * maybe there is a plattform where O_RDWR is not O_RDONLY | O_WRONLY
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91 */
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92 uint32_t access_mask = 0;
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93 if((oflags & O_RDONLY) == O_RDONLY) {
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94 access_mask |= ACL_READ_DATA;
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95 }
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96 if((oflags & O_WRONLY) == O_WRONLY) {
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97 access_mask |= ACL_WRITE_DATA;
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98 }
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99 return access_mask;
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100 }
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101
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102 User* acllist_getuser(Session *sn, Request *rq, ACLListHandle *list) {
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103 // TODO: cache result #50
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104 if(!sn || !rq || !list) {
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105 return NULL;
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106 }
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107
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108 // get user
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109 User *user = NULL;
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110 if(list->defaultauthdb) {
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111 char *usr;
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112 char *pw;
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113 if(!basicauth_getuser(sn, rq, &usr, &pw)) {
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114 int pwok;
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115 user = authdb_get_and_verify(list->defaultauthdb, usr, pw, &pwok);
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116 if(!user) {
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117 // wrong user or wrong password
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118 return NULL;
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119 }
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120 // ok - user is authenticated
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121 pblock_kvinsert(
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122 pb_key_auth_user,
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123 user->name,
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124 strlen(user->name),
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125 rq->vars);
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126 pblock_kvinsert(
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127 pb_key_auth_type,
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128 AUTH_TYPE_BASIC,
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129 sizeof(AUTH_TYPE_BASIC)-1,
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130 rq->vars);
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131 }
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132 }
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133
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134 return user;
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135 }
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136
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137 void acl_set_error_status(Session *sn, Request *rq, ACLList *acl, User *user) {
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138 if(sn == NULL || rq == NULL) {
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139 return;
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140 }
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141
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142 if(!user) {
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143 char *value = NULL;
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144 if(acl->authprompt) {
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145 size_t realmlen = strlen(acl->authprompt);
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146 size_t len = realmlen + 16;
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147 value = pool_malloc(sn->pool, len);
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148 if(value) {
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149 snprintf(
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150 value,
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151 len,
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152 "Basic realm=\"%s\"",
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153 acl->authprompt);
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154 }
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155 }
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156 if(!value) {
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157 value = "Basic realm=\"login\"";
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158 }
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159 pblock_nvinsert("www-authenticate", value, rq->srvhdrs);
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160 protocol_status(sn, rq, PROTOCOL_UNAUTHORIZED, NULL);
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161 } else {
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162 protocol_status(sn, rq, PROTOCOL_FORBIDDEN, NULL);
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163 }
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164 }
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165
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166 int acl_evaluate(Session *sn, Request *rq, int access_mask) {
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167 ACLListHandle *list = rq->acllist;
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168 if(!list) {
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169 return REQ_PROCEED;
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170 }
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171
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172 // we combine access_mask with the required access rights
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173 access_mask |= rq->aclreqaccess;
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174
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175 // get user
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176 User *user = acllist_getuser(sn, rq, list);
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177
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178 // evalutate all ACLs
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179 ACLList *acl = acl_evallist(list, user, access_mask, NULL);
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180 if(acl) {
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181 acl_set_error_status(sn, rq, acl, user);
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182 // TODO: don't free the user here #51
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183 if(user) {
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184 user->free(user);
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185 }
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186 return REQ_ABORTED;
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187 }
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188
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189 // access allowed, we can free the user
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190 if(user) {
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191 user->free(user);
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192 }
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193
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194 return REQ_PROCEED;
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195 }
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196
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197 ACLList* acl_evallist(
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198 ACLListHandle *list,
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199 User *user,
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200 int access_mask,
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201 ACLList **externacl)
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202 {
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203 if(!list) {
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204 return NULL;
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205 }
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206 if(externacl) {
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207 *externacl = NULL;
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208 }
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209
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210 // evaluate each acl until one denies access
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211 ACLListElm *elm = list->listhead;
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212 while(elm) {
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213 ACLList *acl = elm->acl;
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214 if(acl->isextern) {
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215 // set externacl to the first external acl
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216 if(externacl && *externacl == NULL) {
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217 *externacl = acl;
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218 }
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219 } else if(!acl->check(acl, user, access_mask)) {
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220 // the acl denies access
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221 return acl;
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222 }
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223 elm = elm->next;
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224 }
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225
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226 // ok - all acls allowed access
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227
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228 return NULL;
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229 }
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230
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231 int wsacl_affects_user(WSAce *ace, User *user) {
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232 int check_access = 0;
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233
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234 /*
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235 * an ace can affect
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236 * a named user or group (ace->who is set)
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237 * the owner of the resource (ACL_OWNER is set)
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238 * the owning group of the resource (ACL_GROUP is set)
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239 * everyone (ACL_EVERYONE is set)
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240 *
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241 * Only one of this conditions should be true. The behavior on
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242 * illegal flag combination is undefined. We assume that the acls
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243 * are created correctly by the configuration loader.
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244 */
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245
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246 if(ace->who && user) {
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247 // this ace is defined for a named user or group
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248 if((ace->flags & ACL_IDENTIFIER_GROUP) == ACL_IDENTIFIER_GROUP) {
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249 if(user->check_group(user, ace->who)) {
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250 // the user is in the group
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251 check_access = 1;
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252 }
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253 } else {
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254 if(!strcmp(user->name, ace->who)) {
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255 check_access = 1;
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256 }
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257 }
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258 } else if((ace->flags & ACL_OWNER) == ACL_OWNER) {
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259 // TODO
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260 } else if((ace->flags & ACL_GROUP) == ACL_GROUP) {
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261 // TODO
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262 } else if((ace->flags & ACL_EVERYONE) == ACL_EVERYONE) {
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263 check_access = 1;
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264 }
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265
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266 return check_access;
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267 }
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268
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269 int wsacl_check(WSAcl *acl, User *user, int access_mask) {
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270 int allow = 0;
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271 uint32_t allowed_access = 0;
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272 // check each access control entry
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273 for(int i=0;i<acl->acenum;i++) {
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274 WSAce *ace = acl->ace[i];
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275 if(wsacl_affects_user(ace, user)) {
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276 if(ace->type == ACL_TYPE_ALLOWED) {
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277 // add all new access rights
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278 allowed_access |= (access_mask & ace->access_mask);
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279 // check if we have all requested rights
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280 if((allowed_access & access_mask) == access_mask) {
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281 allow = 1;
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282 break;
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283 }
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284 } else {
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285 // ACL_TYPE_DENIED
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286
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287 if((ace->access_mask & access_mask) != 0) {
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288 // access denied
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289 break;
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290 }
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291 }
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292 }
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293 }
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294
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295 // TODO: events
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296
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297 return allow; // allow is 0, if no ace set it to 1
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298 }
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299
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300
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301 /* filesystem acl functions */
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302
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303 #if defined (__SVR4) && defined (__sun)
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304
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305 #include <sys/acl.h>
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306
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307 int solaris_acl_check(
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308 char *path,
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309 struct stat *s,
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310 uint32_t mask,
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311 uid_t uid,
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312 gid_t gid);
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diff changeset
313 int solaris_acl_affects_user(
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314 ace_t *ace,
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315 uid_t uid,
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316 gid_t gid,
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317 uid_t owner,
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318 gid_t owninggroup);
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319
241
4adad7faf452 add proppatch op
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320 int fs_acl_check(SysACL *acl, User *user, const char *path, uint32_t access_mask) {
63
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diff changeset
321 sstr_t p;
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diff changeset
322 if(path[0] != '/') {
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diff changeset
323 size_t n = 128;
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324 char *cwd = malloc(n);
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diff changeset
325 while(!getcwd(cwd, n)) {
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diff changeset
326 if(errno == ERANGE) {
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327 n *= 2;
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328 cwd = realloc(cwd, n);
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329 } else {
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330 free(cwd);
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331 return 0;
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332 }
66442f81f823 supports file system ACLs on Solaris
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333 }
66442f81f823 supports file system ACLs on Solaris
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334 sstr_t wd = sstr(cwd);
241
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335 sstr_t pp = sstr((char*)path);
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336
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e9bb8449df02 fixed solaris build
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337 p = sstrcat(3, wd, sstrn("/", 1), pp);
63
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338 } else {
241
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339 p = sstrdup(sstr((char*)path));
63
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340 }
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diff changeset
341 if(p.ptr[p.length-1] == '/') {
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342 p.ptr[p.length-1] = 0;
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343 p.length--;
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344 }
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345
63
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346 // get uid/gid
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347 struct passwd pw;
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348 if(user) {
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349 char *pwbuf = malloc(DEF_PWBUF);
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350 if(pwbuf == NULL) {
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351 free(p.ptr);
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352 return 0;
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353 }
66442f81f823 supports file system ACLs on Solaris
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diff changeset
354 if(!util_getpwnam(user->name, &pw, pwbuf, DEF_PWBUF)) {
66442f81f823 supports file system ACLs on Solaris
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355 free(pwbuf);
66442f81f823 supports file system ACLs on Solaris
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diff changeset
356 free(p.ptr);
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357 return 0;
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diff changeset
358 }
66442f81f823 supports file system ACLs on Solaris
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diff changeset
359 free(pwbuf);
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diff changeset
360 acl->user_uid = pw.pw_uid;
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diff changeset
361 acl->user_gid = pw.pw_gid;
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diff changeset
362 } else {
66442f81f823 supports file system ACLs on Solaris
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diff changeset
363 acl->user_uid = -1;
66442f81f823 supports file system ACLs on Solaris
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diff changeset
364 acl->user_gid = -1;
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365 }
202
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diff changeset
366
63
66442f81f823 supports file system ACLs on Solaris
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diff changeset
367 // translate access_mask
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diff changeset
368 uint32_t mask = 0;
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diff changeset
369 if((access_mask & ACL_READ_DATA) == ACL_READ_DATA) {
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diff changeset
370 mask |= ACE_READ_DATA;
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diff changeset
371 }
66442f81f823 supports file system ACLs on Solaris
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diff changeset
372 if((access_mask & ACL_WRITE_DATA) == ACL_WRITE_DATA) {
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diff changeset
373 mask |= ACE_WRITE_DATA;
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diff changeset
374 }
66442f81f823 supports file system ACLs on Solaris
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diff changeset
375 if((access_mask & ACL_ADD_FILE) == ACL_ADD_FILE) {
66442f81f823 supports file system ACLs on Solaris
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diff changeset
376 mask |= ACE_ADD_FILE;
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diff changeset
377 }
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diff changeset
378 if((access_mask & ACL_READ_XATTR) == ACL_READ_XATTR) {
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diff changeset
379 mask |= ACE_READ_NAMED_ATTRS;
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diff changeset
380 }
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diff changeset
381 if((access_mask & ACL_WRITE_XATTR) == ACL_WRITE_XATTR) {
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diff changeset
382 mask |= ACE_WRITE_NAMED_ATTRS;
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diff changeset
383 }
66442f81f823 supports file system ACLs on Solaris
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diff changeset
384 if((access_mask & ACL_EXECUTE) == ACL_EXECUTE) {
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diff changeset
385 mask |= ACE_EXECUTE;
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diff changeset
386 }
66442f81f823 supports file system ACLs on Solaris
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diff changeset
387 if((access_mask & ACL_DELETE) == ACL_DELETE) {
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diff changeset
388 mask |= ACE_DELETE_CHILD;
66442f81f823 supports file system ACLs on Solaris
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diff changeset
389 }
66442f81f823 supports file system ACLs on Solaris
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diff changeset
390 if((access_mask & ACL_READ_ATTRIBUTES) == ACL_READ_ATTRIBUTES) {
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diff changeset
391 mask |= ACE_READ_ATTRIBUTES;
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diff changeset
392 }
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
393 if((access_mask & ACL_WRITE_ATTRIBUTES) == ACL_WRITE_ATTRIBUTES) {
66442f81f823 supports file system ACLs on Solaris
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diff changeset
394 mask |= ACE_WRITE_ATTRIBUTES;
66442f81f823 supports file system ACLs on Solaris
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diff changeset
395 }
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
396 if((access_mask & ACL_LIST) == ACL_LIST) {
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
397 mask |= ACE_LIST_DIRECTORY;
66442f81f823 supports file system ACLs on Solaris
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diff changeset
398 }
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
399 if((access_mask & ACL_READ_ACL) == ACL_READ_ACL) {
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
400 mask |= ACE_READ_ACL;
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
401 }
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
402 if((access_mask & ACL_WRITE_ACL) == ACL_WRITE_ACL) {
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
403 mask |= ACE_WRITE_ACL;
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
404 }
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
405 if((access_mask & ACL_WRITE_OWNER) == ACL_WRITE_OWNER) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
406 mask |= ACE_WRITE_OWNER;
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
407 }
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
408 if((access_mask & ACL_SYNCHRONIZE) == ACL_SYNCHRONIZE) {
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
409 mask |= ACE_SYNCHRONIZE;
66442f81f823 supports file system ACLs on Solaris
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diff changeset
410 }
202
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411
63
66442f81f823 supports file system ACLs on Solaris
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diff changeset
412 /*
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
413 * If the vfs wants to create new files, path does not name an existing
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
414 * file. In this case, we check if the user has the ACE_ADD_FILE
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
415 * permission for the parent directory
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
416 */
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
417 struct stat s;
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
418 if(stat(p.ptr, &s)) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
419 if(errno != ENOENT) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
420 perror("fs_acl_check: stat");
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
421 free(p.ptr);
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
422 return 0;
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
423 } else {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
424 mask = ACE_ADD_FILE;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
425 p = util_path_remove_last(p);
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
426 if(stat(p.ptr, &s)) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
427 free(p.ptr);
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
428 return 0;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
429 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
430 }
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
431 }
202
c374d11d6720 remove libnsl from linux makefile
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diff changeset
432
63
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
433 /*
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
434 * perform a acl check for the path and each parent directory
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
435 * we don't check the file system root
202
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diff changeset
436 *
63
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
437 * after the first check, we check only search permission for the
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
438 * directories
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
439 */
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
440 if(!solaris_acl_check(p.ptr, &s, mask, pw.pw_uid, pw.pw_gid)) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
441 free(p.ptr);
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
442 return 0;
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
443 }
202
c374d11d6720 remove libnsl from linux makefile
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diff changeset
444
63
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
445 p = util_path_remove_last(p);
66442f81f823 supports file system ACLs on Solaris
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parents: 54
diff changeset
446 mask = ACE_LIST_DIRECTORY;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
447 while(p.length > 1) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
448 if(stat(p.ptr, &s)) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
449 free(p.ptr);
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
450 return 0;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
451 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
452 if(!solaris_acl_check(p.ptr, &s, mask, pw.pw_uid, pw.pw_gid)) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
453 free(p.ptr);
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
454 return 0;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
455 }
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
456
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
457 // cut the last file name from the path
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
458 p = util_path_remove_last(p);
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
459 }
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
460
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
461
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
462 return 1;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
463 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
464
211
2160585200ac add propfind/proppatch parser and first iteration of the new webdav api
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 202
diff changeset
465 int fs_acl_check_fd(SysACL *acl, User *user, int fd, uint32_t access_mask) {
2160585200ac add propfind/proppatch parser and first iteration of the new webdav api
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 202
diff changeset
466 // TODO:
2160585200ac add propfind/proppatch parser and first iteration of the new webdav api
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 202
diff changeset
467 return 1;
2160585200ac add propfind/proppatch parser and first iteration of the new webdav api
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 202
diff changeset
468 }
2160585200ac add propfind/proppatch parser and first iteration of the new webdav api
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 202
diff changeset
469
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
470 int solaris_acl_check(
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
471 char *path,
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
472 struct stat *s,
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
473 uint32_t mask,
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
474 uid_t uid,
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
475 gid_t gid)
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
476 {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
477 //printf("solaris_acl_check %s\n", path);
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
478
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
479 int nace = acl(path, ACE_GETACLCNT, 0, NULL);
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
480 if(nace == -1) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
481 perror("acl: ACE_GETACLCNT");
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
482 // TODO: log error
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
483 return 0;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
484 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
485 ace_t *aces = calloc(nace, sizeof(ace_t));
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
486 if(acl(path, ACE_GETACL, nace, aces) == 1) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
487 perror("acl: ACE_GETACL");
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
488 // TODO: log error
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
489 free(aces);
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
490 return 0;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
491 }
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
492
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
493 int allow = 0;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
494 uint32_t allowed_access = 0;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
495 for(int i=0;i<nace;i++) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
496 ace_t ace = aces[i];
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
497 if(solaris_acl_affects_user(&ace, uid, gid, s->st_uid, s->st_gid)) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
498 if(ace.a_type == ACE_ACCESS_ALLOWED_ACE_TYPE) {
202
c374d11d6720 remove libnsl from linux makefile
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parents: 141
diff changeset
499 // add all new access rights
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
500 allowed_access |= (mask & ace.a_access_mask);
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
501 // check if we have all requested rights
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
502 if((allowed_access & mask) == mask) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
503 allow = 1;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
504 break;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
505 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
506 } else if(ace.a_type == ACE_ACCESS_DENIED_ACE_TYPE) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
507 // ACL_TYPE_DENIED
202
c374d11d6720 remove libnsl from linux makefile
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parents: 141
diff changeset
508
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
509 if((ace.a_access_mask & mask) != 0) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
510 // access denied
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
511 break;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
512 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
513 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
514 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
515 }
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
516
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
517 free(aces);
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
518
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
519 //printf("return %d\n", allow);
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
520 return allow;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
521 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
522
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
523 int solaris_acl_affects_user(
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
524 ace_t *ace,
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
525 uid_t uid,
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
526 gid_t gid,
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
527 uid_t owner,
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
528 gid_t owninggroup)
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
529 {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
530 /*
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
531 * mostly the same as wsacl_affects_user
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
532 */
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
533
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
534 int check_access = 0;
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
535
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
536 if((ace->a_flags & ACE_OWNER) == ACE_OWNER) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
537 if(uid == owner) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
538 check_access = 1;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
539 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
540 } else if((ace->a_flags & ACE_GROUP) == ACE_GROUP) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
541 if(gid == owninggroup) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
542 check_access = 1;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
543 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
544 } else if((ace->a_flags & ACE_EVERYONE) == ACE_EVERYONE) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
545 check_access = 1;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
546 } else if(ace->a_who != -1 && uid != 0) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
547 // this ace is defined for a named user or group
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
548 if((ace->a_flags & ACE_IDENTIFIER_GROUP) == ACE_IDENTIFIER_GROUP) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
549 // TODO: check all groups
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
550 if(ace->a_who == gid) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
551 // the user is in the group
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
552 check_access = 1;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
553 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
554 } else {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
555 if(ace->a_who == uid) {
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
556 check_access = 1;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
557 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
558 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
559 }
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
560
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
561 return check_access;
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
562 }
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
563
73
79fa26ecd135 added file system ACLs for linux
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 69
diff changeset
564 void fs_acl_finish() {
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
565
73
79fa26ecd135 added file system ACLs for linux
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 69
diff changeset
566 }
63
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
567
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
568 #endif
66442f81f823 supports file system ACLs on Solaris
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 54
diff changeset
569
69
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
570 /*
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
571 * generic code for all non acl unices
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
572 * TODO: don't use OSX in the preprocessor directive
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
573 */
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
574 #ifdef OSX
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
575
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
576 int fs_acl_check(SysACL *acl, User *user, char *path, uint32_t access_mask) {
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
577 return 1;
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
578 }
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
579
211
2160585200ac add propfind/proppatch parser and first iteration of the new webdav api
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 202
diff changeset
580 int fs_acl_check_fd(SysACL *acl, User *user, int fd, uint32_t access_mask) {
2160585200ac add propfind/proppatch parser and first iteration of the new webdav api
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 202
diff changeset
581 return 1;
2160585200ac add propfind/proppatch parser and first iteration of the new webdav api
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 202
diff changeset
582 }
2160585200ac add propfind/proppatch parser and first iteration of the new webdav api
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 202
diff changeset
583
73
79fa26ecd135 added file system ACLs for linux
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 69
diff changeset
584 void fs_acl_finish() {
202
c374d11d6720 remove libnsl from linux makefile
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 141
diff changeset
585
73
79fa26ecd135 added file system ACLs for linux
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 69
diff changeset
586 }
79fa26ecd135 added file system ACLs for linux
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 69
diff changeset
587
69
4a10bc0ee80d compiles on os x
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 66
diff changeset
588 #endif
73
79fa26ecd135 added file system ACLs for linux
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 69
diff changeset
589
109
8a0a7754f123 experimental BSD support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 100
diff changeset
590 #ifdef BSD
8a0a7754f123 experimental BSD support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 100
diff changeset
591
260
4779a6fb4fbe fix freebsd build
Olaf Wintermann <olaf.wintermann@gmail.com>
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592 int fs_acl_check(SysACL *acl, User *user, const char *path, uint32_t access_mask) {
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593 return 1;
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594 }
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595
211
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596 int fs_acl_check_fd(SysACL *acl, User *user, int fd, uint32_t access_mask) {
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597 return 1;
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598 }
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599
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600 void fs_acl_finish() {
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601
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602 }
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603
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604 #endif
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605
73
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606
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607 #ifdef LINUX
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608
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609 #include <sys/fsuid.h>
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610
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611 int fs_acl_check(SysACL *acl, User *user, const char *path, uint32_t access_mask) {
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612 struct passwd *ws_pw = conf_getglobals()->Vuserpw;
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613 if(!ws_pw) {
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614 log_ereport(LOG_FAILURE, "fs_acl_check: unknown webserver uid/gid");
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615 return 1;
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616 }
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617
73
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618 // get uid/gid
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619 struct passwd pw;
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620 if(user) {
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621 char *pwbuf = malloc(DEF_PWBUF);
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622 if(pwbuf == NULL) {
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623 return 0;
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624 }
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625 if(!util_getpwnam(user->name, &pw, pwbuf, DEF_PWBUF)) {
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626 free(pwbuf);
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627 return 0;
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628 }
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629 free(pwbuf);
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630 acl->user_uid = pw.pw_uid;
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631 acl->user_gid = pw.pw_gid;
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632 } else {
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633 acl->user_uid = 0;
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634 acl->user_gid = 0;
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635 }
202
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636
73
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637 // set fs uid/gid
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638 if(acl->user_uid != 0) {
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639 if(setfsuid(pw.pw_uid)) {
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640 log_ereport(
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641 LOG_FAILURE,
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642 "Cannot set fsuid to uid: %u", pw.pw_uid);
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643 }
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644 if(setfsgid(pw.pw_gid)) {
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645 log_ereport(
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646 LOG_FAILURE,
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647 "Cannot set fsgid to gid: %u", pw.pw_gid);
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648 }
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649 }
202
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650
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651
73
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652 return 1;
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653 }
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654
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655 int fs_acl_check_fd(SysACL *acl, User *user, int fd, uint32_t access_mask) {
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656 // TODO
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657 return 1;
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658 }
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659
73
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660 void fs_acl_finish() {
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661 struct passwd *pw = conf_getglobals()->Vuserpw;
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662 if(!pw) {
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663 log_ereport(
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664 LOG_FAILURE,
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665 "global configuration broken (Vuserpw is null)");
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666 return;
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667 }
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668 if(setfsuid(pw->pw_uid)) {
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669 log_ereport(
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670 LOG_FAILURE,
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671 "Cannot set fsuid back to server uid: %u", pw->pw_uid);
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672 }
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673 if(setfsgid(pw->pw_gid)) {
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674 log_ereport(
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675 LOG_FAILURE,
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676 "Cannot set fsgid back to server gid: %u", pw->pw_gid);
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677 }
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678 }
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679
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680 #endif

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