mirror of
https://github.com/nginx/nginx.git
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551091951a
The variable contains a list of curves as supported by the client. Known curves are listed by their names, unknown ones are shown in hex, e.g., "0x001d:prime256v1:secp521r1:secp384r1". Note that OpenSSL uses session data for SSL_get1_curves(), and it doesn't store full list of curves supported by the client when serializing a session. As a result $ssl_curves is only available for new sessions (and will be empty for reused ones). The variable is only meaningful when using OpenSSL 1.0.2 and above. With older versions the variable is empty.
680 lines
18 KiB
C
680 lines
18 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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* Copyright (C) Nginx, Inc.
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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_stream.h>
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typedef ngx_int_t (*ngx_ssl_variable_handler_pt)(ngx_connection_t *c,
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ngx_pool_t *pool, ngx_str_t *s);
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#define NGX_DEFAULT_CIPHERS "HIGH:!aNULL:!MD5"
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#define NGX_DEFAULT_ECDH_CURVE "auto"
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static ngx_int_t ngx_stream_ssl_handler(ngx_stream_session_t *s);
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static ngx_int_t ngx_stream_ssl_init_connection(ngx_ssl_t *ssl,
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ngx_connection_t *c);
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static void ngx_stream_ssl_handshake_handler(ngx_connection_t *c);
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static ngx_int_t ngx_stream_ssl_static_variable(ngx_stream_session_t *s,
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ngx_stream_variable_value_t *v, uintptr_t data);
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static ngx_int_t ngx_stream_ssl_variable(ngx_stream_session_t *s,
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ngx_stream_variable_value_t *v, uintptr_t data);
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static ngx_int_t ngx_stream_ssl_add_variables(ngx_conf_t *cf);
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static void *ngx_stream_ssl_create_conf(ngx_conf_t *cf);
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static char *ngx_stream_ssl_merge_conf(ngx_conf_t *cf, void *parent,
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void *child);
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static char *ngx_stream_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static char *ngx_stream_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static ngx_int_t ngx_stream_ssl_init(ngx_conf_t *cf);
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static ngx_conf_bitmask_t ngx_stream_ssl_protocols[] = {
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{ ngx_string("SSLv2"), NGX_SSL_SSLv2 },
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{ ngx_string("SSLv3"), NGX_SSL_SSLv3 },
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{ ngx_string("TLSv1"), NGX_SSL_TLSv1 },
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{ ngx_string("TLSv1.1"), NGX_SSL_TLSv1_1 },
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{ ngx_string("TLSv1.2"), NGX_SSL_TLSv1_2 },
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{ ngx_null_string, 0 }
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};
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static ngx_command_t ngx_stream_ssl_commands[] = {
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{ ngx_string("ssl_handshake_timeout"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_msec_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, handshake_timeout),
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NULL },
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{ ngx_string("ssl_certificate"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_array_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, certificates),
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NULL },
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{ ngx_string("ssl_certificate_key"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_array_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, certificate_keys),
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NULL },
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{ ngx_string("ssl_password_file"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
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ngx_stream_ssl_password_file,
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NGX_STREAM_SRV_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("ssl_dhparam"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, dhparam),
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NULL },
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{ ngx_string("ssl_ecdh_curve"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, ecdh_curve),
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NULL },
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{ ngx_string("ssl_protocols"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_1MORE,
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ngx_conf_set_bitmask_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, protocols),
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&ngx_stream_ssl_protocols },
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{ ngx_string("ssl_ciphers"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, ciphers),
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NULL },
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{ ngx_string("ssl_prefer_server_ciphers"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
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ngx_conf_set_flag_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, prefer_server_ciphers),
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NULL },
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{ ngx_string("ssl_session_cache"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE12,
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ngx_stream_ssl_session_cache,
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NGX_STREAM_SRV_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("ssl_session_tickets"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
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ngx_conf_set_flag_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, session_tickets),
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NULL },
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{ ngx_string("ssl_session_ticket_key"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_array_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, session_ticket_keys),
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NULL },
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{ ngx_string("ssl_session_timeout"),
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NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_sec_slot,
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NGX_STREAM_SRV_CONF_OFFSET,
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offsetof(ngx_stream_ssl_conf_t, session_timeout),
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NULL },
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ngx_null_command
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};
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static ngx_stream_module_t ngx_stream_ssl_module_ctx = {
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ngx_stream_ssl_add_variables, /* preconfiguration */
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ngx_stream_ssl_init, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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ngx_stream_ssl_create_conf, /* create server configuration */
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ngx_stream_ssl_merge_conf /* merge server configuration */
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};
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ngx_module_t ngx_stream_ssl_module = {
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NGX_MODULE_V1,
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&ngx_stream_ssl_module_ctx, /* module context */
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ngx_stream_ssl_commands, /* module directives */
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NGX_STREAM_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_stream_variable_t ngx_stream_ssl_vars[] = {
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{ ngx_string("ssl_protocol"), NULL, ngx_stream_ssl_static_variable,
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(uintptr_t) ngx_ssl_get_protocol, NGX_STREAM_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_cipher"), NULL, ngx_stream_ssl_static_variable,
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(uintptr_t) ngx_ssl_get_cipher_name, NGX_STREAM_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_ciphers"), NULL, ngx_stream_ssl_variable,
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(uintptr_t) ngx_ssl_get_ciphers, NGX_STREAM_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_curves"), NULL, ngx_stream_ssl_variable,
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(uintptr_t) ngx_ssl_get_curves, NGX_STREAM_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_session_id"), NULL, ngx_stream_ssl_variable,
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(uintptr_t) ngx_ssl_get_session_id, NGX_STREAM_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_session_reused"), NULL, ngx_stream_ssl_variable,
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(uintptr_t) ngx_ssl_get_session_reused, NGX_STREAM_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_server_name"), NULL, ngx_stream_ssl_variable,
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(uintptr_t) ngx_ssl_get_server_name, NGX_STREAM_VAR_CHANGEABLE, 0 },
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{ ngx_null_string, NULL, NULL, 0, 0, 0 }
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};
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static ngx_str_t ngx_stream_ssl_sess_id_ctx = ngx_string("STREAM");
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static ngx_int_t
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ngx_stream_ssl_handler(ngx_stream_session_t *s)
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{
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ngx_connection_t *c;
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ngx_stream_ssl_conf_t *sslcf;
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c = s->connection;
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sslcf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module);
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if (s->ssl && c->ssl == NULL) {
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c->log->action = "SSL handshaking";
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if (sslcf->ssl.ctx == NULL) {
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ngx_log_error(NGX_LOG_ERR, c->log, 0,
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"no \"ssl_certificate\" is defined "
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"in server listening on SSL port");
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return NGX_ERROR;
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}
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return ngx_stream_ssl_init_connection(&sslcf->ssl, c);
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}
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return NGX_OK;
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}
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static ngx_int_t
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ngx_stream_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c)
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{
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ngx_int_t rc;
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ngx_stream_session_t *s;
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ngx_stream_ssl_conf_t *sslcf;
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s = c->data;
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if (ngx_ssl_create_connection(ssl, c, 0) == NGX_ERROR) {
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return NGX_ERROR;
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}
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rc = ngx_ssl_handshake(c);
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if (rc == NGX_ERROR) {
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return NGX_ERROR;
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}
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if (rc == NGX_AGAIN) {
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sslcf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module);
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ngx_add_timer(c->read, sslcf->handshake_timeout);
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c->ssl->handler = ngx_stream_ssl_handshake_handler;
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return NGX_AGAIN;
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}
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/* rc == NGX_OK */
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return NGX_OK;
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}
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static void
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ngx_stream_ssl_handshake_handler(ngx_connection_t *c)
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{
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ngx_stream_session_t *s;
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s = c->data;
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if (!c->ssl->handshaked) {
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ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
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return;
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}
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if (c->read->timer_set) {
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ngx_del_timer(c->read);
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}
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ngx_stream_core_run_phases(s);
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}
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static ngx_int_t
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ngx_stream_ssl_static_variable(ngx_stream_session_t *s,
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ngx_stream_variable_value_t *v, uintptr_t data)
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{
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ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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size_t len;
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ngx_str_t str;
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if (s->connection->ssl) {
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(void) handler(s->connection, NULL, &str);
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v->data = str.data;
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for (len = 0; v->data[len]; len++) { /* void */ }
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v->len = len;
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v->valid = 1;
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v->no_cacheable = 0;
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v->not_found = 0;
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return NGX_OK;
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}
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v->not_found = 1;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_stream_ssl_variable(ngx_stream_session_t *s,
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ngx_stream_variable_value_t *v, uintptr_t data)
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{
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ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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ngx_str_t str;
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if (s->connection->ssl) {
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if (handler(s->connection, s->connection->pool, &str) != NGX_OK) {
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return NGX_ERROR;
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}
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v->len = str.len;
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v->data = str.data;
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if (v->len) {
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v->valid = 1;
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v->no_cacheable = 0;
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v->not_found = 0;
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return NGX_OK;
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}
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}
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v->not_found = 1;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_stream_ssl_add_variables(ngx_conf_t *cf)
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{
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ngx_stream_variable_t *var, *v;
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for (v = ngx_stream_ssl_vars; v->name.len; v++) {
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var = ngx_stream_add_variable(cf, &v->name, v->flags);
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if (var == NULL) {
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return NGX_ERROR;
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}
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var->get_handler = v->get_handler;
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var->data = v->data;
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}
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return NGX_OK;
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}
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static void *
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ngx_stream_ssl_create_conf(ngx_conf_t *cf)
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{
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ngx_stream_ssl_conf_t *scf;
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scf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_ssl_conf_t));
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if (scf == NULL) {
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return NULL;
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}
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/*
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* set by ngx_pcalloc():
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*
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* scf->protocols = 0;
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* scf->dhparam = { 0, NULL };
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* scf->ecdh_curve = { 0, NULL };
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* scf->ciphers = { 0, NULL };
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* scf->shm_zone = NULL;
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*/
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scf->handshake_timeout = NGX_CONF_UNSET_MSEC;
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scf->certificates = NGX_CONF_UNSET_PTR;
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scf->certificate_keys = NGX_CONF_UNSET_PTR;
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scf->passwords = NGX_CONF_UNSET_PTR;
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scf->prefer_server_ciphers = NGX_CONF_UNSET;
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scf->builtin_session_cache = NGX_CONF_UNSET;
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scf->session_timeout = NGX_CONF_UNSET;
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scf->session_tickets = NGX_CONF_UNSET;
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scf->session_ticket_keys = NGX_CONF_UNSET_PTR;
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return scf;
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}
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static char *
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ngx_stream_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child)
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{
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ngx_stream_ssl_conf_t *prev = parent;
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ngx_stream_ssl_conf_t *conf = child;
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ngx_pool_cleanup_t *cln;
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ngx_conf_merge_msec_value(conf->handshake_timeout,
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prev->handshake_timeout, 60000);
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ngx_conf_merge_value(conf->session_timeout,
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prev->session_timeout, 300);
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ngx_conf_merge_value(conf->prefer_server_ciphers,
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prev->prefer_server_ciphers, 0);
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ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
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(NGX_CONF_BITMASK_SET|NGX_SSL_TLSv1
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|NGX_SSL_TLSv1_1|NGX_SSL_TLSv1_2));
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ngx_conf_merge_ptr_value(conf->certificates, prev->certificates, NULL);
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ngx_conf_merge_ptr_value(conf->certificate_keys, prev->certificate_keys,
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NULL);
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ngx_conf_merge_ptr_value(conf->passwords, prev->passwords, NULL);
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ngx_conf_merge_str_value(conf->dhparam, prev->dhparam, "");
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ngx_conf_merge_str_value(conf->ecdh_curve, prev->ecdh_curve,
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NGX_DEFAULT_ECDH_CURVE);
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ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFAULT_CIPHERS);
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conf->ssl.log = cf->log;
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if (conf->certificates == NULL) {
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return NGX_CONF_OK;
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}
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if (conf->certificate_keys == NULL
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|| conf->certificate_keys->nelts < conf->certificates->nelts)
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{
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ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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"no \"ssl_certificate_key\" is defined "
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"for certificate \"%V\"",
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((ngx_str_t *) conf->certificates->elts)
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+ conf->certificates->nelts - 1);
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return NGX_CONF_ERROR;
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}
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if (ngx_ssl_create(&conf->ssl, conf->protocols, NULL) != NGX_OK) {
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return NGX_CONF_ERROR;
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}
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cln = ngx_pool_cleanup_add(cf->pool, 0);
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if (cln == NULL) {
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return NGX_CONF_ERROR;
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}
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cln->handler = ngx_ssl_cleanup_ctx;
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cln->data = &conf->ssl;
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if (ngx_ssl_certificates(cf, &conf->ssl, conf->certificates,
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conf->certificate_keys, conf->passwords)
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!= NGX_OK)
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{
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return NGX_CONF_ERROR;
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}
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if (ngx_ssl_ciphers(cf, &conf->ssl, &conf->ciphers,
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conf->prefer_server_ciphers)
|
|
!= NGX_OK)
|
|
{
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
if (ngx_ssl_dhparam(cf, &conf->ssl, &conf->dhparam) != NGX_OK) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
if (ngx_ssl_ecdh_curve(cf, &conf->ssl, &conf->ecdh_curve) != NGX_OK) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
ngx_conf_merge_value(conf->builtin_session_cache,
|
|
prev->builtin_session_cache, NGX_SSL_NONE_SCACHE);
|
|
|
|
if (conf->shm_zone == NULL) {
|
|
conf->shm_zone = prev->shm_zone;
|
|
}
|
|
|
|
if (ngx_ssl_session_cache(&conf->ssl, &ngx_stream_ssl_sess_id_ctx,
|
|
conf->builtin_session_cache,
|
|
conf->shm_zone, conf->session_timeout)
|
|
!= NGX_OK)
|
|
{
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
ngx_conf_merge_value(conf->session_tickets,
|
|
prev->session_tickets, 1);
|
|
|
|
#ifdef SSL_OP_NO_TICKET
|
|
if (!conf->session_tickets) {
|
|
SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_NO_TICKET);
|
|
}
|
|
#endif
|
|
|
|
ngx_conf_merge_ptr_value(conf->session_ticket_keys,
|
|
prev->session_ticket_keys, NULL);
|
|
|
|
if (ngx_ssl_session_ticket_keys(cf, &conf->ssl, conf->session_ticket_keys)
|
|
!= NGX_OK)
|
|
{
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
|
|
static char *
|
|
ngx_stream_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
{
|
|
ngx_stream_ssl_conf_t *scf = conf;
|
|
|
|
ngx_str_t *value;
|
|
|
|
if (scf->passwords != NGX_CONF_UNSET_PTR) {
|
|
return "is duplicate";
|
|
}
|
|
|
|
value = cf->args->elts;
|
|
|
|
scf->passwords = ngx_ssl_read_password_file(cf, &value[1]);
|
|
|
|
if (scf->passwords == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
|
|
static char *
|
|
ngx_stream_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
{
|
|
ngx_stream_ssl_conf_t *scf = conf;
|
|
|
|
size_t len;
|
|
ngx_str_t *value, name, size;
|
|
ngx_int_t n;
|
|
ngx_uint_t i, j;
|
|
|
|
value = cf->args->elts;
|
|
|
|
for (i = 1; i < cf->args->nelts; i++) {
|
|
|
|
if (ngx_strcmp(value[i].data, "off") == 0) {
|
|
scf->builtin_session_cache = NGX_SSL_NO_SCACHE;
|
|
continue;
|
|
}
|
|
|
|
if (ngx_strcmp(value[i].data, "none") == 0) {
|
|
scf->builtin_session_cache = NGX_SSL_NONE_SCACHE;
|
|
continue;
|
|
}
|
|
|
|
if (ngx_strcmp(value[i].data, "builtin") == 0) {
|
|
scf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE;
|
|
continue;
|
|
}
|
|
|
|
if (value[i].len > sizeof("builtin:") - 1
|
|
&& ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1)
|
|
== 0)
|
|
{
|
|
n = ngx_atoi(value[i].data + sizeof("builtin:") - 1,
|
|
value[i].len - (sizeof("builtin:") - 1));
|
|
|
|
if (n == NGX_ERROR) {
|
|
goto invalid;
|
|
}
|
|
|
|
scf->builtin_session_cache = n;
|
|
|
|
continue;
|
|
}
|
|
|
|
if (value[i].len > sizeof("shared:") - 1
|
|
&& ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1)
|
|
== 0)
|
|
{
|
|
len = 0;
|
|
|
|
for (j = sizeof("shared:") - 1; j < value[i].len; j++) {
|
|
if (value[i].data[j] == ':') {
|
|
break;
|
|
}
|
|
|
|
len++;
|
|
}
|
|
|
|
if (len == 0) {
|
|
goto invalid;
|
|
}
|
|
|
|
name.len = len;
|
|
name.data = value[i].data + sizeof("shared:") - 1;
|
|
|
|
size.len = value[i].len - j - 1;
|
|
size.data = name.data + len + 1;
|
|
|
|
n = ngx_parse_size(&size);
|
|
|
|
if (n == NGX_ERROR) {
|
|
goto invalid;
|
|
}
|
|
|
|
if (n < (ngx_int_t) (8 * ngx_pagesize)) {
|
|
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
"session cache \"%V\" is too small",
|
|
&value[i]);
|
|
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
scf->shm_zone = ngx_shared_memory_add(cf, &name, n,
|
|
&ngx_stream_ssl_module);
|
|
if (scf->shm_zone == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
scf->shm_zone->init = ngx_ssl_session_cache_init;
|
|
|
|
continue;
|
|
}
|
|
|
|
goto invalid;
|
|
}
|
|
|
|
if (scf->shm_zone && scf->builtin_session_cache == NGX_CONF_UNSET) {
|
|
scf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE;
|
|
}
|
|
|
|
return NGX_CONF_OK;
|
|
|
|
invalid:
|
|
|
|
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
"invalid session cache \"%V\"", &value[i]);
|
|
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_stream_ssl_init(ngx_conf_t *cf)
|
|
{
|
|
ngx_stream_handler_pt *h;
|
|
ngx_stream_core_main_conf_t *cmcf;
|
|
|
|
cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);
|
|
|
|
h = ngx_array_push(&cmcf->phases[NGX_STREAM_SSL_PHASE].handlers);
|
|
if (h == NULL) {
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
*h = ngx_stream_ssl_handler;
|
|
|
|
return NGX_OK;
|
|
}
|