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src/http/modules/ngx_http_auth_basic_module.c - nginx-1.7.10
Global variables defined
Data types defined
Functions defined
Macros defined
Source code
- #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,
- ngx_http_auth_basic_init,
- NULL,
- NULL,
- NULL,
- NULL,
- ngx_http_auth_basic_create_loc_conf,
- ngx_http_auth_basic_merge_loc_conf
- };
- ngx_module_t ngx_http_auth_basic_module = {
- NGX_MODULE_V1,
- &ngx_http_auth_basic_module_ctx,
- ngx_http_auth_basic_commands,
- NGX_HTTP_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- 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;
- }
-
- 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
- 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;
- }
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