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94439e4e | 1 | /* |
94439e4e | 2 | * DEBUG: section 29 NTLM Authenticator |
6bf4f823 | 3 | * AUTHOR: Robert Collins, Henrik Nordstrom, Francesco Chemolli |
94439e4e | 4 | * |
2b6662ba | 5 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
94439e4e | 6 | * ---------------------------------------------------------- |
7 | * | |
2b6662ba | 8 | * Squid is the result of efforts by numerous individuals from |
9 | * the Internet community; see the CONTRIBUTORS file for full | |
10 | * details. Many organizations have provided support for Squid's | |
11 | * development; see the SPONSORS file for full details. Squid is | |
12 | * Copyrighted (C) 2001 by the Regents of the University of | |
13 | * California; see the COPYRIGHT file for full details. Squid | |
14 | * incorporates software developed and/or copyrighted by other | |
15 | * sources; see the CREDITS file for full details. | |
94439e4e | 16 | * |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License as published by | |
19 | * the Free Software Foundation; either version 2 of the License, or | |
20 | * (at your option) any later version. | |
26ac0430 | 21 | * |
94439e4e | 22 | * This program is distributed in the hope that it will be useful, |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
26ac0430 | 26 | * |
94439e4e | 27 | * You should have received a copy of the GNU General Public License |
28 | * along with this program; if not, write to the Free Software | |
29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
30 | * | |
31 | */ | |
32 | ||
33 | /* The functions in this file handle authentication. | |
34 | * They DO NOT perform access control or auditing. | |
35 | * See acl.c for access control and client_side.c for auditing */ | |
36 | ||
582c2af2 | 37 | #include "squid.h" |
3ad63615 | 38 | #include "auth/Gadgets.h" |
5817ee13 | 39 | #include "auth/ntlm/auth_ntlm.h" |
616cfc4c | 40 | #include "auth/ntlm/Scheme.h" |
aa110616 | 41 | #include "auth/ntlm/User.h" |
616cfc4c | 42 | #include "auth/ntlm/UserRequest.h" |
928f3421 | 43 | #include "auth/State.h" |
8a01b99e | 44 | #include "cache_cf.h" |
a46d2c0e | 45 | #include "client_side.h" |
a5bac1d2 | 46 | #include "HttpHeaderTools.h" |
924f73bc | 47 | #include "HttpReply.h" |
a2ac85d9 | 48 | #include "HttpRequest.h" |
602d9612 | 49 | #include "mgr/Registration.h" |
cc192b50 | 50 | #include "SquidTime.h" |
602d9612 A |
51 | #include "Store.h" |
52 | #include "wordlist.h" | |
c78aa667 | 53 | |
94439e4e | 54 | /* NTLM Scheme */ |
94439e4e | 55 | static AUTHSSTATS authenticateNTLMStats; |
94439e4e | 56 | |
928f3421 | 57 | statefulhelper *ntlmauthenticators = NULL; |
94439e4e | 58 | static int authntlm_initialised = 0; |
59 | ||
94439e4e | 60 | static hash_table *proxy_auth_cache = NULL; |
61 | ||
62 | /* | |
63 | * | |
64 | * Private Functions | |
65 | * | |
66 | */ | |
67 | ||
0bcb6908 | 68 | void |
372fccd6 | 69 | Auth::Ntlm::Config::rotateHelpers() |
0bcb6908 AJ |
70 | { |
71 | /* schedule closure of existing helpers */ | |
72 | if (ntlmauthenticators) { | |
73 | helperStatefulShutdown(ntlmauthenticators); | |
74 | } | |
75 | ||
76 | /* NP: dynamic helper restart will ensure they start up again as needed. */ | |
77 | } | |
78 | ||
5817ee13 | 79 | /* free any allocated configuration details */ |
f5691f9c | 80 | void |
372fccd6 | 81 | Auth::Ntlm::Config::done() |
94439e4e | 82 | { |
94439e4e | 83 | authntlm_initialised = 0; |
62e76326 | 84 | |
5817ee13 AJ |
85 | if (ntlmauthenticators) { |
86 | helperStatefulShutdown(ntlmauthenticators); | |
5817ee13 | 87 | } |
62e76326 | 88 | |
94439e4e | 89 | if (!shutting_down) |
62e76326 | 90 | return; |
91 | ||
48d54e4d | 92 | delete ntlmauthenticators; |
94439e4e | 93 | ntlmauthenticators = NULL; |
62e76326 | 94 | |
58ee2093 AJ |
95 | if (authenticateProgram) |
96 | wordlistDestroy(&authenticateProgram); | |
cdabe87d | 97 | |
372fccd6 | 98 | debugs(29, DBG_IMPORTANT, "Reconfigure: NTLM authentication configuration cleared."); |
94439e4e | 99 | } |
100 | ||
f5691f9c | 101 | void |
372fccd6 | 102 | Auth::Ntlm::Config::dump(StoreEntry * entry, const char *name, Auth::Config * scheme) |
94439e4e | 103 | { |
58ee2093 | 104 | wordlist *list = authenticateProgram; |
94439e4e | 105 | storeAppendPrintf(entry, "%s %s", name, "ntlm"); |
62e76326 | 106 | |
94439e4e | 107 | while (list != NULL) { |
62e76326 | 108 | storeAppendPrintf(entry, " %s", list->key); |
109 | list = list->next; | |
94439e4e | 110 | } |
62e76326 | 111 | |
404cfda1 AJ |
112 | storeAppendPrintf(entry, "\n%s ntlm children %d startup=%d idle=%d concurrency=%d\n", |
113 | name, authenticateChildren.n_max, authenticateChildren.n_startup, authenticateChildren.n_idle, authenticateChildren.concurrency); | |
6bf4f823 | 114 | storeAppendPrintf(entry, "%s %s keep_alive %s\n", name, "ntlm", keep_alive ? "on" : "off"); |
94439e4e | 115 | |
116 | } | |
117 | ||
372fccd6 | 118 | Auth::Ntlm::Config::Config() : keep_alive(1) |
6bf4f823 | 119 | { } |
62e76326 | 120 | |
f5691f9c | 121 | void |
372fccd6 | 122 | Auth::Ntlm::Config::parse(Auth::Config * scheme, int n_configured, char *param_str) |
f5691f9c | 123 | { |
a37d6070 | 124 | if (strcmp(param_str, "program") == 0) { |
58ee2093 AJ |
125 | if (authenticateProgram) |
126 | wordlistDestroy(&authenticateProgram); | |
62e76326 | 127 | |
58ee2093 | 128 | parse_wordlist(&authenticateProgram); |
62e76326 | 129 | |
58ee2093 | 130 | requirePathnameExists("auth_param ntlm program", authenticateProgram->key); |
a37d6070 | 131 | } else if (strcmp(param_str, "children") == 0) { |
48d54e4d | 132 | authenticateChildren.parseConfig(); |
a37d6070 | 133 | } else if (strcmp(param_str, "keep_alive") == 0) { |
6bf4f823 | 134 | parse_onoff(&keep_alive); |
94439e4e | 135 | } else { |
372fccd6 | 136 | debugs(29, DBG_CRITICAL, "ERROR unrecognised NTLM auth scheme parameter '" << param_str << "'"); |
94439e4e | 137 | } |
138 | } | |
139 | ||
f5691f9c | 140 | const char * |
372fccd6 | 141 | Auth::Ntlm::Config::type() const |
94439e4e | 142 | { |
d6374be6 | 143 | return Auth::Ntlm::Scheme::GetInstance()->type(); |
94439e4e | 144 | } |
145 | ||
146 | /* Initialize helpers and the like for this auth scheme. Called AFTER parsing the | |
147 | * config file */ | |
f5691f9c | 148 | void |
372fccd6 | 149 | Auth::Ntlm::Config::init(Auth::Config * scheme) |
94439e4e | 150 | { |
58ee2093 | 151 | if (authenticateProgram) { |
6bf4f823 | 152 | |
62e76326 | 153 | authntlm_initialised = 1; |
154 | ||
155 | if (ntlmauthenticators == NULL) | |
48d54e4d | 156 | ntlmauthenticators = new statefulhelper("ntlmauthenticator"); |
62e76326 | 157 | |
158 | if (!proxy_auth_cache) | |
30abd221 | 159 | proxy_auth_cache = hash_create((HASHCMP *) strcmp, 7921, hash_string); |
62e76326 | 160 | |
161 | assert(proxy_auth_cache); | |
162 | ||
58ee2093 | 163 | ntlmauthenticators->cmdline = authenticateProgram; |
62e76326 | 164 | |
1af735c7 | 165 | ntlmauthenticators->childs.updateLimits(authenticateChildren); |
62e76326 | 166 | |
167 | ntlmauthenticators->ipc_type = IPC_STREAM; | |
168 | ||
62e76326 | 169 | helperStatefulOpenServers(ntlmauthenticators); |
94439e4e | 170 | } |
171 | } | |
172 | ||
62ee09ca | 173 | void |
372fccd6 | 174 | Auth::Ntlm::Config::registerWithCacheManager(void) |
62ee09ca | 175 | { |
8822ebee | 176 | Mgr::RegisterAction("ntlmauthenticator", |
d9fc6862 A |
177 | "NTLM User Authenticator Stats", |
178 | authenticateNTLMStats, 0, 1); | |
62ee09ca | 179 | } |
180 | ||
f5691f9c | 181 | bool |
372fccd6 | 182 | Auth::Ntlm::Config::active() const |
2d70df72 | 183 | { |
f5691f9c | 184 | return authntlm_initialised == 1; |
2d70df72 | 185 | } |
186 | ||
f5691f9c | 187 | bool |
372fccd6 | 188 | Auth::Ntlm::Config::configured() const |
94439e4e | 189 | { |
58ee2093 | 190 | if ((authenticateProgram != NULL) && (authenticateChildren.n_max != 0)) { |
372fccd6 | 191 | debugs(29, 9, HERE << "returning configured"); |
f5691f9c | 192 | return true; |
2d70df72 | 193 | } |
62e76326 | 194 | |
372fccd6 | 195 | debugs(29, 9, HERE << "returning unconfigured"); |
f5691f9c | 196 | return false; |
94439e4e | 197 | } |
198 | ||
199 | /* NTLM Scheme */ | |
94439e4e | 200 | |
f5691f9c | 201 | void |
c7baff40 | 202 | Auth::Ntlm::Config::fixHeader(Auth::UserRequest::Pointer auth_user_request, HttpReply *rep, http_hdr_type hdrType, HttpRequest * request) |
94439e4e | 203 | { |
58ee2093 | 204 | if (!authenticateProgram) |
6bf4f823 | 205 | return; |
62e76326 | 206 | |
63a05fa3 | 207 | /* Need keep-alive */ |
450fe1cb | 208 | if (!request->flags.proxyKeepalive && request->flags.mustKeepalive) |
26ac0430 | 209 | return; |
63a05fa3 | 210 | |
6bf4f823 | 211 | /* New request, no user details */ |
212 | if (auth_user_request == NULL) { | |
372fccd6 | 213 | debugs(29, 9, HERE << "Sending type:" << hdrType << " header: 'NTLM'"); |
18ec8500 | 214 | httpHeaderPutStrf(&rep->header, hdrType, "NTLM"); |
6bf4f823 | 215 | |
216 | if (!keep_alive) { | |
62e76326 | 217 | /* drop the connection */ |
e857372a | 218 | request->flags.proxyKeepalive = false; |
62e76326 | 219 | } |
6bf4f823 | 220 | } else { |
c7baff40 | 221 | Auth::Ntlm::UserRequest *ntlm_request = dynamic_cast<Auth::Ntlm::UserRequest *>(auth_user_request.getRaw()); |
3a11f20d | 222 | assert(ntlm_request != NULL); |
223 | ||
d232141d | 224 | switch (ntlm_request->user()->credentials()) { |
62e76326 | 225 | |
d87154ee | 226 | case Auth::Failed: |
6bf4f823 | 227 | /* here it makes sense to drop the connection, as auth is |
228 | * tied to it, even if MAYBE the client could handle it - Kinkie */ | |
e857372a | 229 | request->flags.proxyKeepalive = false; |
6bf4f823 | 230 | /* fall through */ |
94439e4e | 231 | |
d87154ee | 232 | case Auth::Ok: |
6bf4f823 | 233 | /* Special case: authentication finished OK but disallowed by ACL. |
234 | * Need to start over to give the client another chance. | |
235 | */ | |
236 | /* fall through */ | |
62e76326 | 237 | |
d87154ee | 238 | case Auth::Unchecked: |
6bf4f823 | 239 | /* semantic change: do not drop the connection. |
240 | * 2.5 implementation used to keep it open - Kinkie */ | |
372fccd6 | 241 | debugs(29, 9, HERE << "Sending type:" << hdrType << " header: 'NTLM'"); |
18ec8500 | 242 | httpHeaderPutStrf(&rep->header, hdrType, "NTLM"); |
6bf4f823 | 243 | break; |
62e76326 | 244 | |
d87154ee | 245 | case Auth::Handshake: |
6bf4f823 | 246 | /* we're waiting for a response from the client. Pass it the blob */ |
372fccd6 | 247 | debugs(29, 9, HERE << "Sending type:" << hdrType << " header: 'NTLM " << ntlm_request->server_blob << "'"); |
18ec8500 | 248 | httpHeaderPutStrf(&rep->header, hdrType, "NTLM %s", ntlm_request->server_blob); |
6bf4f823 | 249 | safe_free(ntlm_request->server_blob); |
250 | break; | |
62e76326 | 251 | |
6bf4f823 | 252 | default: |
372fccd6 | 253 | debugs(29, DBG_CRITICAL, "NTLM Auth fixHeader: state " << ntlm_request->user()->credentials() << "."); |
6bf4f823 | 254 | fatal("unexpected state in AuthenticateNTLMFixErrorHeader.\n"); |
255 | } | |
256 | } | |
257 | } | |
62e76326 | 258 | |
94439e4e | 259 | static void |
260 | authenticateNTLMStats(StoreEntry * sentry) | |
261 | { | |
9522b380 | 262 | helperStatefulStats(sentry, ntlmauthenticators, "NTLM Authenticator Statistics"); |
94439e4e | 263 | } |
264 | ||
94439e4e | 265 | /* |
6bf4f823 | 266 | * Decode a NTLM [Proxy-]Auth string, placing the results in the passed |
94439e4e | 267 | * Auth_user structure. |
268 | */ | |
c7baff40 | 269 | Auth::UserRequest::Pointer |
372fccd6 | 270 | Auth::Ntlm::Config::decode(char const *proxy_auth) |
94439e4e | 271 | { |
aa110616 | 272 | Auth::Ntlm::User *newUser = new Auth::Ntlm::User(Auth::Config::Find("ntlm")); |
c7baff40 | 273 | Auth::UserRequest::Pointer auth_user_request = new Auth::Ntlm::UserRequest(); |
f5691f9c | 274 | assert(auth_user_request->user() == NULL); |
a33a428a | 275 | |
f5691f9c | 276 | auth_user_request->user(newUser); |
616cfc4c | 277 | auth_user_request->user()->auth_type = Auth::AUTH_NTLM; |
94439e4e | 278 | |
279 | /* all we have to do is identify that it's NTLM - the helper does the rest */ | |
372fccd6 | 280 | debugs(29, 9, HERE << "decode: NTLM authentication"); |
f5691f9c | 281 | return auth_user_request; |
94439e4e | 282 | } |