Mercurial > hg > nginx-vendor-0-7
view src/http/modules/ngx_http_auth_basic_module.c @ 71:66f1f40f29d6
Added tag NGINX_0_1_35 for changeset 8ad297c88dcb
author | Igor Sysoev <http://sysoev.ru> |
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date | Tue, 07 Jun 2005 00:00:00 +0400 |
parents | b55cbf18157e |
children | e916a291e9aa |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #define NGX_HTTP_AUTH_BUF_SIZE 2048 typedef struct { ngx_str_t passwd; } ngx_http_auth_basic_ctx_t; typedef struct { ngx_str_t realm; ngx_str_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_cycle_t *cycle); static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data); static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic; 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_CONF_TAKE1, ngx_conf_set_str_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_auth_basic_loc_conf_t, realm), &ngx_http_auth_basic_p }, { ngx_string("auth_basic_user_file"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_str_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_auth_basic_loc_conf_t, user_file), NULL }, ngx_null_command }; ngx_http_module_t ngx_http_auth_basic_module_ctx = { NULL, /* preconfiguration */ NULL, /* 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 */ ngx_http_auth_basic_init, /* init module */ NULL /* init process */ }; 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_str_t auth, encoded, pwd; ngx_uint_t i, login, len, 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.len == 0 || alcf->user_file.len == 0) { return NGX_OK; } 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, &alcf->realm); } if (r->headers_in.authorization == NULL) { return ngx_http_auth_basic_set_realm(r, &alcf->realm); } encoded = r->headers_in.authorization->value; if (encoded.len < sizeof("Basic ") - 1 || ngx_strncasecmp(encoded.data, "Basic ", sizeof("Basic ") - 1) != 0) { return ngx_http_auth_basic_set_realm(r, &alcf->realm); } encoded.len -= sizeof("Basic ") - 1; encoded.data += sizeof("Basic ") - 1; while (encoded.len && encoded.data[0] == ' ') { encoded.len--; encoded.data++; } if (encoded.len == 0) { return ngx_http_auth_basic_set_realm(r, &alcf->realm); } auth.len = ngx_base64_decoded_length(encoded.len); auth.data = ngx_palloc(r->pool, auth.len + 1); if (auth.data == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } if (ngx_decode_base64(&auth, &encoded) != NGX_OK) { return ngx_http_auth_basic_set_realm(r, &alcf->realm); } auth.data[auth.len] = '\0'; for (len = 0; len < auth.len; len++) { if (auth.data[len] == ':') { break; } } if (len == auth.len) { return ngx_http_auth_basic_set_realm(r, &alcf->realm); } r->headers_in.user.len = len; r->headers_in.user.data = auth.data; r->headers_in.passwd.len = auth.len - len - 1; r->headers_in.passwd.data = &auth.data[len + 1]; fd = ngx_open_file(alcf->user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN); if (fd == NGX_INVALID_FILE) { ngx_log_error(NGX_LOG_ERR, r->connection->log, ngx_errno, ngx_open_file_n " \"%s\" failed", alcf->user_file.data); return NGX_HTTP_INTERNAL_SERVER_ERROR; } ngx_memzero(&file, sizeof(ngx_file_t)); file.fd = fd; file.name = alcf->user_file; file.log = r->connection->log; state = sw_login; passwd = 0; login = 0; left = 0; offset = 0; for ( ;; ) { 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 && buf[i] == '#') { state = sw_skip; break; } if (buf[i] != auth.data[login]) { state = sw_skip; break; } if (login == 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, &alcf->realm); } break; case sw_skip: if (buf[i] == LF) { state = sw_login; login = 0; } break; } } if (state == sw_passwd) { left = left + n - passwd; ngx_memcpy(buf, &buf[passwd], left); passwd = 0; } else { left = 0; } offset += n; } ngx_http_auth_basic_close(&file); return ngx_http_auth_basic_set_realm(r, &alcf->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); 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) { 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; } r->headers_out.www_authenticate->hash = 1; r->headers_out.www_authenticate->key.len = sizeof("WWW-Authenticate") - 1; r->headers_out.www_authenticate->key.data = (u_char *) "WWW-Authenticate"; r->headers_out.www_authenticate->value = *realm; 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 NGX_CONF_ERROR; } 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; size_t len; u_char *realm, *p; if (conf->realm.data) { if (conf->realm.len) { len = sizeof("Basic realm=\"") - 1 + conf->realm.len + 1; realm = ngx_palloc(cf->pool, len); if (realm == NULL) { return NGX_CONF_ERROR; } p = ngx_cpymem(realm, "Basic realm=\"", sizeof("Basic realm=\"") - 1); p = ngx_cpymem(p, conf->realm.data, conf->realm.len); *p = '"'; conf->realm.len = len; conf->realm.data = realm; } } else { conf->realm = prev->realm; } if (conf->user_file.data) { if (ngx_conf_full_name(cf->cycle, &conf->user_file) != NGX_OK) { return NGX_CONF_ERROR; } } else { conf->user_file = prev->user_file; } return NGX_CONF_OK; } static ngx_int_t ngx_http_auth_basic_init(ngx_cycle_t *cycle) { ngx_http_handler_pt *h; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_cycle_get_module_main_conf(cycle, 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(ngx_conf_t *cf, void *post, void *data) { ngx_str_t *realm = data; if (ngx_strcmp(realm->data, "off") == 0) { realm->len = 0; realm->data = (u_char *) ""; } return NGX_CONF_OK; }