diff options
Diffstat (limited to 'app/nginx/src/http/modules/ngx_http_auth_basic_module.c')
| -rw-r--r-- | app/nginx/src/http/modules/ngx_http_auth_basic_module.c | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/app/nginx/src/http/modules/ngx_http_auth_basic_module.c b/app/nginx/src/http/modules/ngx_http_auth_basic_module.c new file mode 100644 index 0000000..1e7a0c2 --- /dev/null +++ b/app/nginx/src/http/modules/ngx_http_auth_basic_module.c @@ -0,0 +1,467 @@ + +/* + * 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: %i 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; +} |