mirror of
https://github.com/nginx/nginx.git
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436 lines
12 KiB
C
436 lines
12 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_http.h>
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#define NGX_HTTP_AUTH_BUF_SIZE 2048
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typedef struct {
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ngx_str_t passwd;
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} ngx_http_auth_basic_ctx_t;
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typedef struct {
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ngx_str_t realm;
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ngx_str_t user_file;
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} ngx_http_auth_basic_loc_conf_t;
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static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r);
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static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm);
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static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r,
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ngx_str_t *realm);
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static void ngx_http_auth_basic_close(ngx_file_t *file);
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static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf);
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static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf,
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void *parent, void *child);
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static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf);
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static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data);
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static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic;
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static ngx_command_t ngx_http_auth_basic_commands[] = {
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{ ngx_string("auth_basic"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_auth_basic_loc_conf_t, realm),
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&ngx_http_auth_basic_p },
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{ ngx_string("auth_basic_user_file"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_HTTP_LOC_CONF_OFFSET,
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offsetof(ngx_http_auth_basic_loc_conf_t, user_file),
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NULL },
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ngx_null_command
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};
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static ngx_http_module_t ngx_http_auth_basic_module_ctx = {
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NULL, /* preconfiguration */
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ngx_http_auth_basic_init, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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ngx_http_auth_basic_create_loc_conf, /* create location configuration */
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ngx_http_auth_basic_merge_loc_conf /* merge location configuration */
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};
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ngx_module_t ngx_http_auth_basic_module = {
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NGX_MODULE_V1,
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&ngx_http_auth_basic_module_ctx, /* module context */
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ngx_http_auth_basic_commands, /* module directives */
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NGX_HTTP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static ngx_int_t
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ngx_http_auth_basic_handler(ngx_http_request_t *r)
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{
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off_t offset;
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ssize_t n;
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ngx_fd_t fd;
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ngx_int_t rc;
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ngx_str_t pwd;
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ngx_uint_t i, login, left, passwd;
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ngx_file_t file;
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ngx_http_auth_basic_ctx_t *ctx;
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ngx_http_auth_basic_loc_conf_t *alcf;
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u_char buf[NGX_HTTP_AUTH_BUF_SIZE];
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enum {
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sw_login,
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sw_passwd,
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sw_skip
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} state;
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alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module);
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if (alcf->realm.len == 0 || alcf->user_file.len == 0) {
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return NGX_DECLINED;
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}
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ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module);
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if (ctx) {
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return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd,
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&alcf->realm);
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}
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rc = ngx_http_auth_basic_user(r);
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if (rc == NGX_DECLINED) {
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"no user/password was provided for basic authentication");
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return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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}
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if (rc == NGX_ERROR) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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fd = ngx_open_file(alcf->user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
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if (fd == NGX_INVALID_FILE) {
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ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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ngx_open_file_n " \"%s\" failed", alcf->user_file.data);
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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ngx_memzero(&file, sizeof(ngx_file_t));
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file.fd = fd;
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file.name = alcf->user_file;
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file.log = r->connection->log;
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state = sw_login;
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passwd = 0;
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login = 0;
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left = 0;
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offset = 0;
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for ( ;; ) {
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i = left;
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n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left,
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offset);
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if (n == NGX_ERROR) {
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ngx_http_auth_basic_close(&file);
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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if (n == 0) {
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break;
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}
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for (i = left; i < left + n; i++) {
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switch (state) {
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case sw_login:
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if (login == 0) {
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if (buf[i] == '#' || buf[i] == CR) {
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state = sw_skip;
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break;
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}
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if (buf[i] == LF) {
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break;
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}
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}
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if (buf[i] != r->headers_in.user.data[login]) {
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state = sw_skip;
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break;
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}
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if (login == r->headers_in.user.len) {
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state = sw_passwd;
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passwd = i + 1;
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}
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login++;
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break;
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case sw_passwd:
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if (buf[i] == LF || buf[i] == CR || buf[i] == ':') {
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buf[i] = '\0';
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ngx_http_auth_basic_close(&file);
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pwd.len = i - passwd;
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pwd.data = &buf[passwd];
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return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd,
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&alcf->realm);
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}
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break;
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case sw_skip:
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if (buf[i] == LF) {
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state = sw_login;
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login = 0;
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}
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break;
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}
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}
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if (state == sw_passwd) {
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left = left + n - passwd;
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ngx_memcpy(buf, &buf[passwd], left);
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passwd = 0;
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} else {
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left = 0;
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}
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offset += n;
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}
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ngx_http_auth_basic_close(&file);
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if (state == sw_passwd) {
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pwd.len = i - passwd;
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pwd.data = ngx_pnalloc(r->pool, pwd.len + 1);
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if (pwd.data == NULL) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1);
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return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &alcf->realm);
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}
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"user \"%V\" was not found in \"%V\"",
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&r->headers_in.user, &alcf->user_file);
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return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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}
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static ngx_int_t
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ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm)
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{
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ngx_int_t rc;
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u_char *encrypted;
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rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data,
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&encrypted);
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ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"rc: %d user: \"%V\" salt: \"%s\"",
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rc, &r->headers_in.user, passwd->data);
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if (rc == NGX_OK) {
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if (ngx_strcmp(encrypted, passwd->data) == 0) {
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return NGX_OK;
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}
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ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"encrypted: \"%s\"", encrypted);
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"user \"%V\": password mismatch",
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&r->headers_in.user);
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return ngx_http_auth_basic_set_realm(r, realm);
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}
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if (rc == NGX_ERROR) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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/* rc == NGX_AGAIN */
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if (ctx == NULL) {
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ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t));
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if (ctx == NULL) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module);
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ctx->passwd.len = passwd->len;
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passwd->len++;
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ctx->passwd.data = ngx_pstrdup(r->pool, passwd);
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if (ctx->passwd.data == NULL) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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}
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/* TODO: add mutex event */
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return rc;
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}
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static ngx_int_t
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ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm)
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{
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r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers);
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if (r->headers_out.www_authenticate == NULL) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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r->headers_out.www_authenticate->hash = 1;
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r->headers_out.www_authenticate->key.len = sizeof("WWW-Authenticate") - 1;
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r->headers_out.www_authenticate->key.data = (u_char *) "WWW-Authenticate";
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r->headers_out.www_authenticate->value = *realm;
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return NGX_HTTP_UNAUTHORIZED;
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}
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static void
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ngx_http_auth_basic_close(ngx_file_t *file)
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{
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if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno,
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ngx_close_file_n " \"%s\" failed", file->name.data);
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}
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}
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static void *
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ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf)
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{
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ngx_http_auth_basic_loc_conf_t *conf;
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conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t));
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if (conf == NULL) {
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return NGX_CONF_ERROR;
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}
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return conf;
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}
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static char *
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ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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{
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ngx_http_auth_basic_loc_conf_t *prev = parent;
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ngx_http_auth_basic_loc_conf_t *conf = child;
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if (conf->realm.data == NULL) {
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conf->realm = prev->realm;
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}
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if (conf->user_file.data) {
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if (ngx_conf_full_name(cf->cycle, &conf->user_file, 1) != NGX_OK) {
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return NGX_CONF_ERROR;
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}
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} else {
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conf->user_file = prev->user_file;
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}
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return NGX_CONF_OK;
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}
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static ngx_int_t
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ngx_http_auth_basic_init(ngx_conf_t *cf)
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{
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ngx_http_handler_pt *h;
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ngx_http_core_main_conf_t *cmcf;
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cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
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h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
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if (h == NULL) {
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return NGX_ERROR;
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}
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*h = ngx_http_auth_basic_handler;
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return NGX_OK;
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}
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static char *
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ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data)
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{
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ngx_str_t *realm = data;
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size_t len;
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u_char *basic, *p;
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if (ngx_strcmp(realm->data, "off") == 0) {
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realm->len = 0;
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realm->data = (u_char *) "";
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return NGX_CONF_OK;
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}
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len = sizeof("Basic realm=\"") - 1 + realm->len + 1;
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basic = ngx_pnalloc(cf->pool, len);
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if (basic == NULL) {
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return NGX_CONF_ERROR;
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}
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p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1);
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p = ngx_cpymem(p, realm->data, realm->len);
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*p = '"';
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realm->len = len;
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realm->data = basic;
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return NGX_CONF_OK;
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}
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