| |
| /* |
| * 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_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_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_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_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 == 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; |
| } |
| |
| 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) { |
| rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
| goto cleanup; |
| } |
| |
| 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'; |
| |
| pwd.len = i - passwd; |
| pwd.data = &buf[passwd]; |
| |
| rc = ngx_http_auth_basic_crypt_handler(r, &pwd, &realm); |
| goto cleanup; |
| } |
| |
| 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; |
| } |
| |
| 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); |
| |
| rc = ngx_http_auth_basic_crypt_handler(r, &pwd, &realm); |
| goto cleanup; |
| } |
| |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| "user \"%V\" was not found in \"%s\"", |
| &r->headers_in.user, user_file.data); |
| |
| rc = ngx_http_auth_basic_set_realm(r, &realm); |
| |
| cleanup: |
| |
| if (ngx_close_file(file.fd) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno, |
| ngx_close_file_n " \"%s\" failed", user_file.data); |
| } |
| |
| ngx_explicit_memzero(buf, NGX_HTTP_AUTH_BUF_SIZE); |
| |
| return rc; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, 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: %i user: \"%V\" salt: \"%s\"", |
| rc, &r->headers_in.user, passwd->data); |
| |
| if (rc != NGX_OK) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| 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); |
| } |
| |
| |
| 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) { |
| r->headers_out.www_authenticate->hash = 0; |
| r->headers_out.www_authenticate = 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_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; |
| } |
| |
| conf->realm = NGX_CONF_UNSET_PTR; |
| conf->user_file = NGX_CONF_UNSET_PTR; |
| |
| 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; |
| |
| ngx_conf_merge_ptr_value(conf->realm, prev->realm, NULL); |
| ngx_conf_merge_ptr_value(conf->user_file, prev->user_file, NULL); |
| |
| 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 != NGX_CONF_UNSET_PTR) { |
| return "is duplicate"; |
| } |
| |
| alcf->user_file = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t)); |
| if (alcf->user_file == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| 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; |
| } |