view src/http/modules/ngx_http_gzip_static_module.c @ 7361:c09c7d47acb9

SSL: logging level of "no suitable signature algorithm". The "no suitable signature algorithm" errors are reported by OpenSSL 1.1.1 when using TLSv1.3 if there are no shared signature algorithms. In particular, this can happen if the client limits available signature algorithms to something we don't have a certificate for, or to an empty list. For example, the following command: openssl s_client -connect 127.0.0.1:8443 -sigalgs rsa_pkcs1_sha1 will always result in the "no suitable signature algorithm" error as the "rsa_pkcs1_sha1" algorithm refers solely to signatures which appear in certificates and not defined for use in TLS 1.3 handshake messages. The SSL_R_NO_COMMON_SIGNATURE_ALGORITHMS error is what BoringSSL returns in the same situation.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 25 Sep 2018 14:00:04 +0300
parents 5116cfea1e9a
children d26db4f82d7d
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>


#define NGX_HTTP_GZIP_STATIC_OFF     0
#define NGX_HTTP_GZIP_STATIC_ON      1
#define NGX_HTTP_GZIP_STATIC_ALWAYS  2


typedef struct {
    ngx_uint_t  enable;
} ngx_http_gzip_static_conf_t;


static ngx_int_t ngx_http_gzip_static_handler(ngx_http_request_t *r);
static void *ngx_http_gzip_static_create_conf(ngx_conf_t *cf);
static char *ngx_http_gzip_static_merge_conf(ngx_conf_t *cf, void *parent,
    void *child);
static ngx_int_t ngx_http_gzip_static_init(ngx_conf_t *cf);


static ngx_conf_enum_t  ngx_http_gzip_static[] = {
    { ngx_string("off"), NGX_HTTP_GZIP_STATIC_OFF },
    { ngx_string("on"), NGX_HTTP_GZIP_STATIC_ON },
    { ngx_string("always"), NGX_HTTP_GZIP_STATIC_ALWAYS },
    { ngx_null_string, 0 }
};


static ngx_command_t  ngx_http_gzip_static_commands[] = {

    { ngx_string("gzip_static"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_enum_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_gzip_static_conf_t, enable),
      &ngx_http_gzip_static },

      ngx_null_command
};


static ngx_http_module_t  ngx_http_gzip_static_module_ctx = {
    NULL,                                  /* preconfiguration */
    ngx_http_gzip_static_init,             /* postconfiguration */

    NULL,                                  /* create main configuration */
    NULL,                                  /* init main configuration */

    NULL,                                  /* create server configuration */
    NULL,                                  /* merge server configuration */

    ngx_http_gzip_static_create_conf,      /* create location configuration */
    ngx_http_gzip_static_merge_conf        /* merge location configuration */
};


ngx_module_t  ngx_http_gzip_static_module = {
    NGX_MODULE_V1,
    &ngx_http_gzip_static_module_ctx,      /* module context */
    ngx_http_gzip_static_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_gzip_static_handler(ngx_http_request_t *r)
{
    u_char                       *p;
    size_t                        root;
    ngx_str_t                     path;
    ngx_int_t                     rc;
    ngx_uint_t                    level;
    ngx_log_t                    *log;
    ngx_buf_t                    *b;
    ngx_chain_t                   out;
    ngx_table_elt_t              *h;
    ngx_open_file_info_t          of;
    ngx_http_core_loc_conf_t     *clcf;
    ngx_http_gzip_static_conf_t  *gzcf;

    if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
        return NGX_DECLINED;
    }

    if (r->uri.data[r->uri.len - 1] == '/') {
        return NGX_DECLINED;
    }

    gzcf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_static_module);

    if (gzcf->enable == NGX_HTTP_GZIP_STATIC_OFF) {
        return NGX_DECLINED;
    }

    if (gzcf->enable == NGX_HTTP_GZIP_STATIC_ON) {
        rc = ngx_http_gzip_ok(r);

    } else {
        /* always */
        rc = NGX_OK;
    }

    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);

    if (!clcf->gzip_vary && rc != NGX_OK) {
        return NGX_DECLINED;
    }

    log = r->connection->log;

    p = ngx_http_map_uri_to_path(r, &path, &root, sizeof(".gz") - 1);
    if (p == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    *p++ = '.';
    *p++ = 'g';
    *p++ = 'z';
    *p = '\0';

    path.len = p - path.data;

    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
                   "http filename: \"%s\"", path.data);

    ngx_memzero(&of, sizeof(ngx_open_file_info_t));

    of.read_ahead = clcf->read_ahead;
    of.directio = clcf->directio;
    of.valid = clcf->open_file_cache_valid;
    of.min_uses = clcf->open_file_cache_min_uses;
    of.errors = clcf->open_file_cache_errors;
    of.events = clcf->open_file_cache_events;

    if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
        != NGX_OK)
    {
        switch (of.err) {

        case 0:
            return NGX_HTTP_INTERNAL_SERVER_ERROR;

        case NGX_ENOENT:
        case NGX_ENOTDIR:
        case NGX_ENAMETOOLONG:

            return NGX_DECLINED;

        case NGX_EACCES:
#if (NGX_HAVE_OPENAT)
        case NGX_EMLINK:
        case NGX_ELOOP:
#endif

            level = NGX_LOG_ERR;
            break;

        default:

            level = NGX_LOG_CRIT;
            break;
        }

        ngx_log_error(level, log, of.err,
                      "%s \"%s\" failed", of.failed, path.data);

        return NGX_DECLINED;
    }

    if (gzcf->enable == NGX_HTTP_GZIP_STATIC_ON) {
        r->gzip_vary = 1;

        if (rc != NGX_OK) {
            return NGX_DECLINED;
        }
    }

    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", of.fd);

    if (of.is_dir) {
        ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
        return NGX_DECLINED;
    }

#if !(NGX_WIN32) /* the not regular files are probably Unix specific */

    if (!of.is_file) {
        ngx_log_error(NGX_LOG_CRIT, log, 0,
                      "\"%s\" is not a regular file", path.data);

        return NGX_HTTP_NOT_FOUND;
    }

#endif

    r->root_tested = !r->error_page;

    rc = ngx_http_discard_request_body(r);

    if (rc != NGX_OK) {
        return rc;
    }

    log->action = "sending response to client";

    r->headers_out.status = NGX_HTTP_OK;
    r->headers_out.content_length_n = of.size;
    r->headers_out.last_modified_time = of.mtime;

    if (ngx_http_set_etag(r) != NGX_OK) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    if (ngx_http_set_content_type(r) != NGX_OK) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    h = ngx_list_push(&r->headers_out.headers);
    if (h == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    h->hash = 1;
    ngx_str_set(&h->key, "Content-Encoding");
    ngx_str_set(&h->value, "gzip");
    r->headers_out.content_encoding = h;

    /* we need to allocate all before the header would be sent */

    b = ngx_calloc_buf(r->pool);
    if (b == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
    if (b->file == NULL) {
        return NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    rc = ngx_http_send_header(r);

    if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
        return rc;
    }

    b->file_pos = 0;
    b->file_last = of.size;

    b->in_file = b->file_last ? 1 : 0;
    b->last_buf = (r == r->main) ? 1 : 0;
    b->last_in_chain = 1;

    b->file->fd = of.fd;
    b->file->name = path;
    b->file->log = log;
    b->file->directio = of.is_directio;

    out.buf = b;
    out.next = NULL;

    return ngx_http_output_filter(r, &out);
}


static void *
ngx_http_gzip_static_create_conf(ngx_conf_t *cf)
{
    ngx_http_gzip_static_conf_t  *conf;

    conf = ngx_palloc(cf->pool, sizeof(ngx_http_gzip_static_conf_t));
    if (conf == NULL) {
        return NULL;
    }

    conf->enable = NGX_CONF_UNSET_UINT;

    return conf;
}


static char *
ngx_http_gzip_static_merge_conf(ngx_conf_t *cf, void *parent, void *child)
{
    ngx_http_gzip_static_conf_t *prev = parent;
    ngx_http_gzip_static_conf_t *conf = child;

    ngx_conf_merge_uint_value(conf->enable, prev->enable,
                              NGX_HTTP_GZIP_STATIC_OFF);

    return NGX_CONF_OK;
}


static ngx_int_t
ngx_http_gzip_static_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_CONTENT_PHASE].handlers);
    if (h == NULL) {
        return NGX_ERROR;
    }

    *h = ngx_http_gzip_static_handler;

    return NGX_OK;
}