Mercurial > hg > nginx
annotate src/http/modules/ngx_http_auth_basic_module.c @ 3887:e7798b5e990a
use memmove() in appropriate places
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 12 Apr 2011 08:02:46 +0000 |
| parents | dd1570b6f237 |
| children | 9c057d5e1c27 |
| rev | line source |
|---|---|
| 503 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_http.h> | |
| 10 | |
| 11 | |
| 12 #define NGX_HTTP_AUTH_BUF_SIZE 2048 | |
| 13 | |
| 14 | |
| 15 typedef struct { | |
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16 ngx_str_t passwd; |
| 503 | 17 } ngx_http_auth_basic_ctx_t; |
| 18 | |
| 19 | |
| 20 typedef struct { | |
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21 ngx_str_t realm; |
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22 ngx_http_complex_value_t user_file; |
| 503 | 23 } ngx_http_auth_basic_loc_conf_t; |
| 24 | |
| 25 | |
| 26 static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r); | |
| 27 static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
| 28 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm); | |
| 29 static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r, | |
| 30 ngx_str_t *realm); | |
| 31 static void ngx_http_auth_basic_close(ngx_file_t *file); | |
| 32 static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf); | |
| 33 static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, | |
| 34 void *parent, void *child); | |
| 681 | 35 static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf); |
| 503 | 36 static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data); |
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37 static char *ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, |
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38 void *conf); |
| 503 | 39 |
| 40 | |
| 41 static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic; | |
| 42 | |
| 43 static ngx_command_t ngx_http_auth_basic_commands[] = { | |
| 44 | |
| 45 { ngx_string("auth_basic"), | |
| 631 | 46 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
| 47 |NGX_CONF_TAKE1, | |
| 503 | 48 ngx_conf_set_str_slot, |
| 49 NGX_HTTP_LOC_CONF_OFFSET, | |
| 50 offsetof(ngx_http_auth_basic_loc_conf_t, realm), | |
| 51 &ngx_http_auth_basic_p }, | |
| 52 | |
| 53 { ngx_string("auth_basic_user_file"), | |
| 631 | 54 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
| 55 |NGX_CONF_TAKE1, | |
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56 ngx_http_auth_basic_user_file, |
| 503 | 57 NGX_HTTP_LOC_CONF_OFFSET, |
| 58 offsetof(ngx_http_auth_basic_loc_conf_t, user_file), | |
| 59 NULL }, | |
| 60 | |
| 61 ngx_null_command | |
| 62 }; | |
| 63 | |
| 64 | |
| 667 | 65 static ngx_http_module_t ngx_http_auth_basic_module_ctx = { |
| 509 | 66 NULL, /* preconfiguration */ |
| 681 | 67 ngx_http_auth_basic_init, /* postconfiguration */ |
| 503 | 68 |
| 69 NULL, /* create main configuration */ | |
| 70 NULL, /* init main configuration */ | |
| 71 | |
| 72 NULL, /* create server configuration */ | |
| 73 NULL, /* merge server configuration */ | |
| 74 | |
| 75 ngx_http_auth_basic_create_loc_conf, /* create location configuration */ | |
| 76 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */ | |
| 77 }; | |
| 78 | |
| 79 | |
| 80 ngx_module_t ngx_http_auth_basic_module = { | |
| 509 | 81 NGX_MODULE_V1, |
| 503 | 82 &ngx_http_auth_basic_module_ctx, /* module context */ |
| 83 ngx_http_auth_basic_commands, /* module directives */ | |
| 84 NGX_HTTP_MODULE, /* module type */ | |
| 541 | 85 NULL, /* init master */ |
| 681 | 86 NULL, /* init module */ |
| 541 | 87 NULL, /* init process */ |
| 88 NULL, /* init thread */ | |
| 89 NULL, /* exit thread */ | |
| 90 NULL, /* exit process */ | |
| 91 NULL, /* exit master */ | |
| 92 NGX_MODULE_V1_PADDING | |
| 503 | 93 }; |
| 94 | |
| 95 | |
| 96 static ngx_int_t | |
| 97 ngx_http_auth_basic_handler(ngx_http_request_t *r) | |
| 98 { | |
| 99 off_t offset; | |
| 100 ssize_t n; | |
| 101 ngx_fd_t fd; | |
| 539 | 102 ngx_int_t rc; |
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103 ngx_err_t err; |
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104 ngx_str_t pwd, user_file; |
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105 ngx_uint_t i, level, login, left, passwd; |
| 503 | 106 ngx_file_t file; |
| 107 ngx_http_auth_basic_ctx_t *ctx; | |
| 108 ngx_http_auth_basic_loc_conf_t *alcf; | |
| 109 u_char buf[NGX_HTTP_AUTH_BUF_SIZE]; | |
| 110 enum { | |
| 111 sw_login, | |
| 112 sw_passwd, | |
| 113 sw_skip | |
| 114 } state; | |
| 115 | |
| 116 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module); | |
| 117 | |
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118 if (alcf->realm.len == 0 || alcf->user_file.value.len == 0) { |
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119 return NGX_DECLINED; |
| 503 | 120 } |
| 121 | |
| 122 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module); | |
| 123 | |
| 124 if (ctx) { | |
| 125 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd, | |
| 126 &alcf->realm); | |
| 127 } | |
| 128 | |
| 539 | 129 rc = ngx_http_auth_basic_user(r); |
| 503 | 130 |
| 539 | 131 if (rc == NGX_DECLINED) { |
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132 |
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133 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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134 "no user/password was provided for basic authentication"); |
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135 |
| 503 | 136 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
| 137 } | |
| 138 | |
| 539 | 139 if (rc == NGX_ERROR) { |
| 503 | 140 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 141 } | |
| 142 | |
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143 if (ngx_http_complex_value(r, &alcf->user_file, &user_file) != NGX_OK) { |
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144 return NGX_ERROR; |
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145 } |
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146 |
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147 fd = ngx_open_file(user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); |
| 503 | 148 |
| 149 if (fd == NGX_INVALID_FILE) { | |
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150 err = ngx_errno; |
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151 |
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152 if (err == NGX_ENOENT) { |
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153 level = NGX_LOG_ERR; |
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154 rc = NGX_HTTP_FORBIDDEN; |
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155 |
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156 } else { |
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157 level = NGX_LOG_CRIT; |
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158 rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
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159 } |
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160 |
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161 ngx_log_error(level, r->connection->log, err, |
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162 ngx_open_file_n " \"%s\" failed", user_file.data); |
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163 |
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164 return rc; |
| 503 | 165 } |
| 166 | |
| 167 ngx_memzero(&file, sizeof(ngx_file_t)); | |
| 168 | |
| 169 file.fd = fd; | |
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170 file.name = user_file; |
| 503 | 171 file.log = r->connection->log; |
| 172 | |
| 173 state = sw_login; | |
| 174 passwd = 0; | |
| 175 login = 0; | |
| 176 left = 0; | |
| 177 offset = 0; | |
| 178 | |
| 179 for ( ;; ) { | |
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180 i = left; |
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181 |
| 503 | 182 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left, |
| 183 offset); | |
| 184 | |
| 185 if (n == NGX_ERROR) { | |
| 186 ngx_http_auth_basic_close(&file); | |
| 187 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 188 } | |
| 189 | |
| 190 if (n == 0) { | |
| 191 break; | |
| 192 } | |
| 193 | |
| 194 for (i = left; i < left + n; i++) { | |
| 195 switch (state) { | |
| 196 | |
| 197 case sw_login: | |
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198 if (login == 0) { |
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199 |
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200 if (buf[i] == '#' || buf[i] == CR) { |
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201 state = sw_skip; |
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202 break; |
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203 } |
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204 |
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205 if (buf[i] == LF) { |
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206 break; |
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207 } |
| 503 | 208 } |
| 209 | |
| 539 | 210 if (buf[i] != r->headers_in.user.data[login]) { |
| 503 | 211 state = sw_skip; |
| 212 break; | |
| 213 } | |
| 214 | |
| 539 | 215 if (login == r->headers_in.user.len) { |
| 503 | 216 state = sw_passwd; |
| 217 passwd = i + 1; | |
| 218 } | |
| 219 | |
| 220 login++; | |
| 221 | |
| 222 break; | |
| 223 | |
| 224 case sw_passwd: | |
| 225 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') { | |
| 226 buf[i] = '\0'; | |
| 227 | |
| 228 ngx_http_auth_basic_close(&file); | |
| 229 | |
| 230 pwd.len = i - passwd; | |
| 231 pwd.data = &buf[passwd]; | |
| 232 | |
| 233 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, | |
| 234 &alcf->realm); | |
| 235 } | |
| 236 | |
| 237 break; | |
| 238 | |
| 239 case sw_skip: | |
| 240 if (buf[i] == LF) { | |
| 241 state = sw_login; | |
| 242 login = 0; | |
| 243 } | |
| 244 | |
| 245 break; | |
| 246 } | |
| 247 } | |
| 248 | |
| 249 if (state == sw_passwd) { | |
| 250 left = left + n - passwd; | |
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251 ngx_memmove(buf, &buf[passwd], left); |
| 503 | 252 passwd = 0; |
| 253 | |
| 254 } else { | |
| 255 left = 0; | |
| 256 } | |
| 257 | |
| 258 offset += n; | |
| 259 } | |
| 260 | |
| 261 ngx_http_auth_basic_close(&file); | |
| 262 | |
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263 if (state == sw_passwd) { |
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264 pwd.len = i - passwd; |
| 2049 | 265 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1); |
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266 if (pwd.data == NULL) { |
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267 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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268 } |
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269 |
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270 ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1); |
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271 |
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272 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &alcf->realm); |
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273 } |
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274 |
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275 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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276 "user \"%V\" was not found in \"%V\"", |
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277 &r->headers_in.user, &user_file); |
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278 |
| 503 | 279 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
| 280 } | |
| 281 | |
| 282 | |
| 283 static ngx_int_t | |
| 284 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
| 285 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm) | |
| 286 { | |
| 287 ngx_int_t rc; | |
| 288 u_char *encrypted; | |
| 289 | |
| 290 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data, | |
| 291 &encrypted); | |
| 292 | |
| 293 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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294 "rc: %d user: \"%V\" salt: \"%s\"", |
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295 rc, &r->headers_in.user, passwd->data); |
| 503 | 296 |
| 297 if (rc == NGX_OK) { | |
| 298 if (ngx_strcmp(encrypted, passwd->data) == 0) { | |
| 299 return NGX_OK; | |
| 300 } | |
| 301 | |
| 302 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 303 "encrypted: \"%s\"", encrypted); | |
| 304 | |
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305 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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306 "user \"%V\": password mismatch", |
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307 &r->headers_in.user); |
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308 |
| 503 | 309 return ngx_http_auth_basic_set_realm(r, realm); |
| 310 } | |
| 311 | |
| 312 if (rc == NGX_ERROR) { | |
| 313 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 314 } | |
| 315 | |
| 316 /* rc == NGX_AGAIN */ | |
| 317 | |
| 318 if (ctx == NULL) { | |
| 319 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t)); | |
| 320 if (ctx == NULL) { | |
| 321 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 322 } | |
| 323 | |
| 324 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module); | |
| 325 | |
| 326 ctx->passwd.len = passwd->len; | |
| 327 passwd->len++; | |
| 328 | |
| 329 ctx->passwd.data = ngx_pstrdup(r->pool, passwd); | |
| 330 if (ctx->passwd.data == NULL) { | |
| 331 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 332 } | |
| 333 | |
| 334 } | |
| 335 | |
| 336 /* TODO: add mutex event */ | |
| 337 | |
| 338 return rc; | |
| 339 } | |
| 340 | |
| 341 | |
| 342 static ngx_int_t | |
| 343 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm) | |
| 344 { | |
| 345 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers); | |
| 346 if (r->headers_out.www_authenticate == NULL) { | |
| 347 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 348 } | |
| 349 | |
| 509 | 350 r->headers_out.www_authenticate->hash = 1; |
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351 ngx_str_set(&r->headers_out.www_authenticate->key, "WWW-Authenticate"); |
| 503 | 352 r->headers_out.www_authenticate->value = *realm; |
| 353 | |
| 354 return NGX_HTTP_UNAUTHORIZED; | |
| 355 } | |
| 356 | |
| 357 static void | |
| 358 ngx_http_auth_basic_close(ngx_file_t *file) | |
| 359 { | |
| 360 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
| 361 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno, | |
| 362 ngx_close_file_n " \"%s\" failed", file->name.data); | |
| 363 } | |
| 364 } | |
| 365 | |
| 366 | |
| 367 static void * | |
| 368 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf) | |
| 369 { | |
| 370 ngx_http_auth_basic_loc_conf_t *conf; | |
| 371 | |
| 372 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t)); | |
| 373 if (conf == NULL) { | |
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374 return NULL; |
| 503 | 375 } |
| 376 | |
| 377 return conf; | |
| 378 } | |
| 379 | |
| 380 | |
| 381 static char * | |
| 382 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 383 { | |
| 384 ngx_http_auth_basic_loc_conf_t *prev = parent; | |
| 385 ngx_http_auth_basic_loc_conf_t *conf = child; | |
| 386 | |
| 581 | 387 if (conf->realm.data == NULL) { |
| 503 | 388 conf->realm = prev->realm; |
| 389 } | |
| 390 | |
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391 if (conf->user_file.value.len == 0) { |
| 503 | 392 conf->user_file = prev->user_file; |
| 393 } | |
| 394 | |
| 395 return NGX_CONF_OK; | |
| 396 } | |
| 397 | |
| 398 | |
| 399 static ngx_int_t | |
| 681 | 400 ngx_http_auth_basic_init(ngx_conf_t *cf) |
| 503 | 401 { |
| 402 ngx_http_handler_pt *h; | |
| 403 ngx_http_core_main_conf_t *cmcf; | |
| 404 | |
| 681 | 405 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); |
| 503 | 406 |
| 407 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers); | |
| 408 if (h == NULL) { | |
| 409 return NGX_ERROR; | |
| 410 } | |
| 411 | |
| 412 *h = ngx_http_auth_basic_handler; | |
| 413 | |
| 414 return NGX_OK; | |
| 415 } | |
| 416 | |
| 417 | |
| 418 static char * | |
| 419 ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data) | |
| 420 { | |
| 421 ngx_str_t *realm = data; | |
| 422 | |
| 581 | 423 size_t len; |
| 424 u_char *basic, *p; | |
| 425 | |
| 503 | 426 if (ngx_strcmp(realm->data, "off") == 0) { |
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427 ngx_str_set(realm, ""); |
| 583 | 428 return NGX_CONF_OK; |
| 503 | 429 } |
| 430 | |
| 581 | 431 len = sizeof("Basic realm=\"") - 1 + realm->len + 1; |
| 432 | |
| 2049 | 433 basic = ngx_pnalloc(cf->pool, len); |
| 581 | 434 if (basic == NULL) { |
| 435 return NGX_CONF_ERROR; | |
| 436 } | |
| 437 | |
| 438 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1); | |
| 439 p = ngx_cpymem(p, realm->data, realm->len); | |
| 440 *p = '"'; | |
| 441 | |
| 442 realm->len = len; | |
| 443 realm->data = basic; | |
| 444 | |
| 503 | 445 return NGX_CONF_OK; |
| 446 } | |
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447 |
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448 |
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449 static char * |
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450 ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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451 { |
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452 ngx_http_auth_basic_loc_conf_t *alcf = conf; |
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453 |
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454 ngx_str_t *value; |
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455 ngx_http_compile_complex_value_t ccv; |
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456 |
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457 if (alcf->user_file.value.len) { |
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458 return "is duplicate"; |
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459 } |
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460 |
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461 value = cf->args->elts; |
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462 |
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463 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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464 |
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465 ccv.cf = cf; |
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466 ccv.value = &value[1]; |
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467 ccv.complex_value = &alcf->user_file; |
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468 ccv.zero = 1; |
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469 ccv.conf_prefix = 1; |
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470 |
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471 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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472 return NGX_CONF_ERROR; |
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473 } |
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474 |
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475 return NGX_CONF_OK; |
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476 } |