Mercurial > hg > nginx-quic
view src/http/modules/ngx_http_auth_basic_module.c @ 6133:af7eba90645d
Win32: shared memory base addresses and remapping.
Two mechanisms are implemented to make it possible to store pointers
in shared memory on Windows, in particular on Windows Vista and later
versions with ASLR:
- The ngx_shm_remap() function added to allow remapping of a shared memory
zone to the address originally used for it in the master process. While
important, it doesn't solve the problem by itself as in many cases it's
not possible to use the address because of conflicts with other
allocations.
- We now create mappings at the same address in all processes by starting
mappings at predefined addresses normally unused by newborn processes.
These two mechanisms combined allow to use shared memory on Windows
almost without problems, including reloads.
Based on the patch by Sergey Brester:
http://mailman.nginx.org/pipermail/nginx-devel/2015-April/006836.html
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 27 Apr 2015 18:25:42 +0300 |
parents | c37f34bda5ea |
children | f01ab2dbcfdc |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #include <ngx_crypt.h> #define NGX_HTTP_AUTH_BUF_SIZE 2048 typedef struct { ngx_str_t passwd; } ngx_http_auth_basic_ctx_t; typedef struct { ngx_http_complex_value_t *realm; ngx_http_complex_value_t user_file; } ngx_http_auth_basic_loc_conf_t; static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r); static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm); static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm); static void ngx_http_auth_basic_close(ngx_file_t *file); static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf); static char *ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_command_t ngx_http_auth_basic_commands[] = { { ngx_string("auth_basic"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |NGX_CONF_TAKE1, ngx_http_set_complex_value_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_auth_basic_loc_conf_t, realm), NULL }, { ngx_string("auth_basic_user_file"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |NGX_CONF_TAKE1, ngx_http_auth_basic_user_file, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_auth_basic_loc_conf_t, user_file), NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_auth_basic_module_ctx = { NULL, /* preconfiguration */ ngx_http_auth_basic_init, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_auth_basic_create_loc_conf, /* create location configuration */ ngx_http_auth_basic_merge_loc_conf /* merge location configuration */ }; ngx_module_t ngx_http_auth_basic_module = { NGX_MODULE_V1, &ngx_http_auth_basic_module_ctx, /* module context */ ngx_http_auth_basic_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r) { off_t offset; ssize_t n; ngx_fd_t fd; ngx_int_t rc; ngx_err_t err; ngx_str_t pwd, realm, user_file; ngx_uint_t i, level, login, left, passwd; ngx_file_t file; ngx_http_auth_basic_ctx_t *ctx; ngx_http_auth_basic_loc_conf_t *alcf; u_char buf[NGX_HTTP_AUTH_BUF_SIZE]; enum { sw_login, sw_passwd, sw_skip } state; alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module); if (alcf->realm == NULL || alcf->user_file.value.data == NULL) { return NGX_DECLINED; } if (ngx_http_complex_value(r, alcf->realm, &realm) != NGX_OK) { return NGX_ERROR; } if (realm.len == 3 && ngx_strncmp(realm.data, "off", 3) == 0) { return NGX_DECLINED; } ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module); if (ctx) { return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd, &realm); } rc = ngx_http_auth_basic_user(r); if (rc == NGX_DECLINED) { ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, "no user/password was provided for basic authentication"); return ngx_http_auth_basic_set_realm(r, &realm); } if (rc == NGX_ERROR) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } if (ngx_http_complex_value(r, &alcf->user_file, &user_file) != NGX_OK) { return NGX_ERROR; } fd = ngx_open_file(user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); if (fd == NGX_INVALID_FILE) { err = ngx_errno; if (err == NGX_ENOENT) { level = NGX_LOG_ERR; rc = NGX_HTTP_FORBIDDEN; } else { level = NGX_LOG_CRIT; rc = NGX_HTTP_INTERNAL_SERVER_ERROR; } ngx_log_error(level, r->connection->log, err, ngx_open_file_n " \"%s\" failed", user_file.data); return rc; } ngx_memzero(&file, sizeof(ngx_file_t)); file.fd = fd; file.name = user_file; file.log = r->connection->log; state = sw_login; passwd = 0; login = 0; left = 0; offset = 0; for ( ;; ) { i = left; n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left, offset); if (n == NGX_ERROR) { ngx_http_auth_basic_close(&file); return NGX_HTTP_INTERNAL_SERVER_ERROR; } if (n == 0) { break; } for (i = left; i < left + n; i++) { switch (state) { case sw_login: if (login == 0) { if (buf[i] == '#' || buf[i] == CR) { state = sw_skip; break; } if (buf[i] == LF) { break; } } if (buf[i] != r->headers_in.user.data[login]) { state = sw_skip; break; } if (login == r->headers_in.user.len) { state = sw_passwd; passwd = i + 1; } login++; break; case sw_passwd: if (buf[i] == LF || buf[i] == CR || buf[i] == ':') { buf[i] = '\0'; ngx_http_auth_basic_close(&file); pwd.len = i - passwd; pwd.data = &buf[passwd]; return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &realm); } break; case sw_skip: if (buf[i] == LF) { state = sw_login; login = 0; } break; } } if (state == sw_passwd) { left = left + n - passwd; ngx_memmove(buf, &buf[passwd], left); passwd = 0; } else { left = 0; } offset += n; } ngx_http_auth_basic_close(&file); if (state == sw_passwd) { pwd.len = i - passwd; pwd.data = ngx_pnalloc(r->pool, pwd.len + 1); if (pwd.data == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1); return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &realm); } ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "user \"%V\" was not found in \"%V\"", &r->headers_in.user, &user_file); return ngx_http_auth_basic_set_realm(r, &realm); } static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm) { ngx_int_t rc; u_char *encrypted; rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data, &encrypted); ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "rc: %d user: \"%V\" salt: \"%s\"", rc, &r->headers_in.user, passwd->data); if (rc == NGX_OK) { if (ngx_strcmp(encrypted, passwd->data) == 0) { return NGX_OK; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "encrypted: \"%s\"", encrypted); ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "user \"%V\": password mismatch", &r->headers_in.user); return ngx_http_auth_basic_set_realm(r, realm); } if (rc == NGX_ERROR) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } /* rc == NGX_AGAIN */ if (ctx == NULL) { ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t)); if (ctx == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module); ctx->passwd.len = passwd->len; passwd->len++; ctx->passwd.data = ngx_pstrdup(r->pool, passwd); if (ctx->passwd.data == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } } /* TODO: add mutex event */ return rc; } static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm) { size_t len; u_char *basic, *p; r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers); if (r->headers_out.www_authenticate == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } len = sizeof("Basic realm=\"\"") - 1 + realm->len; basic = ngx_pnalloc(r->pool, len); if (basic == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1); p = ngx_cpymem(p, realm->data, realm->len); *p = '"'; r->headers_out.www_authenticate->hash = 1; ngx_str_set(&r->headers_out.www_authenticate->key, "WWW-Authenticate"); r->headers_out.www_authenticate->value.data = basic; r->headers_out.www_authenticate->value.len = len; return NGX_HTTP_UNAUTHORIZED; } static void ngx_http_auth_basic_close(ngx_file_t *file) { if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno, ngx_close_file_n " \"%s\" failed", file->name.data); } } static void * ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf) { ngx_http_auth_basic_loc_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t)); if (conf == NULL) { return NULL; } return conf; } static char * ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_auth_basic_loc_conf_t *prev = parent; ngx_http_auth_basic_loc_conf_t *conf = child; if (conf->realm == NULL) { conf->realm = prev->realm; } if (conf->user_file.value.data == NULL) { conf->user_file = prev->user_file; } return NGX_CONF_OK; } static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf) { ngx_http_handler_pt *h; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_http_auth_basic_handler; return NGX_OK; } static char * ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_auth_basic_loc_conf_t *alcf = conf; ngx_str_t *value; ngx_http_compile_complex_value_t ccv; if (alcf->user_file.value.data) { return "is duplicate"; } value = cf->args->elts; ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); ccv.cf = cf; ccv.value = &value[1]; ccv.complex_value = &alcf->user_file; ccv.zero = 1; ccv.conf_prefix = 1; if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { return NGX_CONF_ERROR; } return NGX_CONF_OK; }