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ngx_stream_ssl_module.c
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// annotated by chrono since 2018
//
// * ngx_stream_ssl_handler
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_stream.h>
typedef ngx_int_t (*ngx_ssl_variable_handler_pt)(ngx_connection_t *c,
ngx_pool_t *pool, ngx_str_t *s);
#define NGX_DEFAULT_CIPHERS "HIGH:!aNULL:!MD5"
#define NGX_DEFAULT_ECDH_CURVE "auto"
static ngx_int_t ngx_stream_ssl_handler(ngx_stream_session_t *s);
static ngx_int_t ngx_stream_ssl_init_connection(ngx_ssl_t *ssl,
ngx_connection_t *c);
static void ngx_stream_ssl_handshake_handler(ngx_connection_t *c);
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
static int ngx_stream_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad,
void *arg);
#endif
#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
static int ngx_stream_ssl_alpn_select(ngx_ssl_conn_t *ssl_conn,
const unsigned char **out, unsigned char *outlen,
const unsigned char *in, unsigned int inlen, void *arg);
#endif
#ifdef SSL_R_CERT_CB_ERROR
static int ngx_stream_ssl_certificate(ngx_ssl_conn_t *ssl_conn, void *arg);
#endif
static ngx_int_t ngx_stream_ssl_static_variable(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_ssl_variable(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
// 添加ssl相关的变量
static ngx_int_t ngx_stream_ssl_add_variables(ngx_conf_t *cf);
static void *ngx_stream_ssl_create_srv_conf(ngx_conf_t *cf);
static char *ngx_stream_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent,
void *child);
static ngx_int_t ngx_stream_ssl_compile_certificates(ngx_conf_t *cf,
ngx_stream_ssl_srv_conf_t *conf);
static char *ngx_stream_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_stream_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_stream_ssl_alpn(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_stream_ssl_conf_command_check(ngx_conf_t *cf, void *post,
void *data);
// 把ngx_stream_ssl_handler加入ssl阶段
static ngx_int_t ngx_stream_ssl_init(ngx_conf_t *cf);
static ngx_conf_bitmask_t ngx_stream_ssl_protocols[] = {
{ ngx_string("SSLv2"), NGX_SSL_SSLv2 },
{ ngx_string("SSLv3"), NGX_SSL_SSLv3 },
{ ngx_string("TLSv1"), NGX_SSL_TLSv1 },
{ ngx_string("TLSv1.1"), NGX_SSL_TLSv1_1 },
{ ngx_string("TLSv1.2"), NGX_SSL_TLSv1_2 },
{ ngx_string("TLSv1.3"), NGX_SSL_TLSv1_3 },
{ ngx_null_string, 0 }
};
static ngx_conf_enum_t ngx_stream_ssl_verify[] = {
{ ngx_string("off"), 0 },
{ ngx_string("on"), 1 },
{ ngx_string("optional"), 2 },
{ ngx_string("optional_no_ca"), 3 },
{ ngx_null_string, 0 }
};
static ngx_conf_post_t ngx_stream_ssl_conf_command_post =
{ ngx_stream_ssl_conf_command_check };
static ngx_command_t ngx_stream_ssl_commands[] = {
{ ngx_string("ssl_handshake_timeout"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, handshake_timeout),
NULL },
{ ngx_string("ssl_certificate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_array_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, certificates),
NULL },
{ ngx_string("ssl_certificate_key"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_array_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, certificate_keys),
NULL },
{ ngx_string("ssl_password_file"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_ssl_password_file,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
{ ngx_string("ssl_dhparam"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, dhparam),
NULL },
{ ngx_string("ssl_ecdh_curve"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, ecdh_curve),
NULL },
{ ngx_string("ssl_protocols"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_1MORE,
ngx_conf_set_bitmask_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, protocols),
&ngx_stream_ssl_protocols },
{ ngx_string("ssl_ciphers"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, ciphers),
NULL },
{ ngx_string("ssl_verify_client"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_enum_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, verify),
&ngx_stream_ssl_verify },
{ ngx_string("ssl_verify_depth"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, verify_depth),
NULL },
{ ngx_string("ssl_client_certificate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, client_certificate),
NULL },
{ ngx_string("ssl_trusted_certificate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, trusted_certificate),
NULL },
{ ngx_string("ssl_prefer_server_ciphers"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, prefer_server_ciphers),
NULL },
{ ngx_string("ssl_session_cache"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE12,
ngx_stream_ssl_session_cache,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
{ ngx_string("ssl_session_tickets"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, session_tickets),
NULL },
{ ngx_string("ssl_session_ticket_key"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_array_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, session_ticket_keys),
NULL },
{ ngx_string("ssl_session_timeout"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_sec_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, session_timeout),
NULL },
{ ngx_string("ssl_crl"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, crl),
NULL },
{ ngx_string("ssl_conf_command"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE2,
ngx_conf_set_keyval_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, conf_commands),
&ngx_stream_ssl_conf_command_post },
{ ngx_string("ssl_reject_handshake"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_ssl_srv_conf_t, reject_handshake),
NULL },
{ ngx_string("ssl_alpn"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_1MORE,
ngx_stream_ssl_alpn,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_stream_module_t ngx_stream_ssl_module_ctx = {
// 添加ssl相关的变量
ngx_stream_ssl_add_variables, /* preconfiguration */
// 把ngx_stream_ssl_handler加入ssl阶段
ngx_stream_ssl_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
ngx_stream_ssl_create_srv_conf, /* create server configuration */
ngx_stream_ssl_merge_srv_conf /* merge server configuration */
};
ngx_module_t ngx_stream_ssl_module = {
NGX_MODULE_V1,
&ngx_stream_ssl_module_ctx, /* module context */
ngx_stream_ssl_commands, /* module directives */
NGX_STREAM_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_stream_variable_t ngx_stream_ssl_vars[] = {
{ ngx_string("ssl_protocol"), NULL, ngx_stream_ssl_static_variable,
(uintptr_t) ngx_ssl_get_protocol, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_cipher"), NULL, ngx_stream_ssl_static_variable,
(uintptr_t) ngx_ssl_get_cipher_name, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_ciphers"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_ciphers, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_curve"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_curve, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_curves"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_curves, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_session_id"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_session_id, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_session_reused"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_session_reused, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_server_name"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_server_name, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_alpn_protocol"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_alpn_protocol, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_cert"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_certificate, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_raw_cert"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_raw_certificate,
NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_escaped_cert"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_escaped_certificate,
NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_s_dn"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_subject_dn, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_i_dn"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_issuer_dn, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_serial"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_serial_number, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_fingerprint"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_fingerprint, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_verify"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_client_verify, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_v_start"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_client_v_start, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_v_end"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_client_v_end, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_v_remain"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_client_v_remain, NGX_STREAM_VAR_CHANGEABLE, 0 },
ngx_stream_null_variable
};
static ngx_str_t ngx_stream_ssl_sess_id_ctx = ngx_string("STREAM");
static ngx_int_t
ngx_stream_ssl_handler(ngx_stream_session_t *s)
{
long rc;
X509 *cert;
ngx_int_t rv;
ngx_connection_t *c;
ngx_stream_ssl_srv_conf_t *sscf;
// 会话不使用ssl则直接退出
if (!s->ssl) {
return NGX_OK;
}
c = s->connection;
sscf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module);
// c->ssl : ngx_ssl_connection_t
// 如果指针是null，则还没有开始ssl握手，需要开始握手
if (c->ssl == NULL) {
c->log->action = "SSL handshaking";
rv = ngx_stream_ssl_init_connection(&sscf->ssl, c);
if (rv != NGX_OK) {
return rv;
}
}
if (sscf->verify) {
rc = SSL_get_verify_result(c->ssl->connection);
if (rc != X509_V_OK
&& (sscf->verify != 3 || !ngx_ssl_verify_error_optional(rc)))
{
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"client SSL certificate verify error: (%l:%s)",
rc, X509_verify_cert_error_string(rc));
ngx_ssl_remove_cached_session(c->ssl->session_ctx,
(SSL_get0_session(c->ssl->connection)));
return NGX_ERROR;
}
if (sscf->verify == 1) {
cert = SSL_get_peer_certificate(c->ssl->connection);
if (cert == NULL) {
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"client sent no required SSL certificate");
ngx_ssl_remove_cached_session(c->ssl->session_ctx,
(SSL_get0_session(c->ssl->connection)));
return NGX_ERROR;
}
X509_free(cert);
}
}
return NGX_OK;
}
static ngx_int_t
ngx_stream_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c)
{
ngx_int_t rc;
ngx_stream_session_t *s;
ngx_stream_ssl_srv_conf_t *sscf;
ngx_stream_core_srv_conf_t *cscf;
s = c->data;
cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module);
if (cscf->tcp_nodelay && ngx_tcp_nodelay(c) != NGX_OK) {
return NGX_ERROR;
}
if (ngx_ssl_create_connection(ssl, c, 0) != NGX_OK) {
return NGX_ERROR;
}
rc = ngx_ssl_handshake(c);
if (rc == NGX_ERROR) {
return NGX_ERROR;
}
if (rc == NGX_AGAIN) {
sscf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module);
ngx_add_timer(c->read, sscf->handshake_timeout);
c->ssl->handler = ngx_stream_ssl_handshake_handler;
return NGX_AGAIN;
}
/* rc == NGX_OK */
return NGX_OK;
}
static void
ngx_stream_ssl_handshake_handler(ngx_connection_t *c)
{
ngx_stream_session_t *s;
s = c->data;
if (!c->ssl->handshaked) {
ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (c->read->timer_set) {
ngx_del_timer(c->read);
}
ngx_stream_core_run_phases(s);
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
static int
ngx_stream_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad, void *arg)
{
ngx_int_t rc;
ngx_str_t host;
const char *servername;
ngx_connection_t *c;
ngx_stream_session_t *s;
ngx_stream_ssl_srv_conf_t *sscf;
ngx_stream_core_srv_conf_t *cscf;
c = ngx_ssl_get_connection(ssl_conn);
if (c->ssl->handshaked) {
*ad = SSL_AD_NO_RENEGOTIATION;
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
s = c->data;
servername = SSL_get_servername(ssl_conn, TLSEXT_NAMETYPE_host_name);
if (servername == NULL) {
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
"SSL server name: null");
goto done;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"SSL server name: \"%s\"", servername);
host.len = ngx_strlen(servername);
if (host.len == 0) {
goto done;
}
host.data = (u_char *) servername;
rc = ngx_stream_validate_host(&host, c->pool, 1);
if (rc == NGX_ERROR) {
goto error;
}
if (rc == NGX_DECLINED) {
goto done;
}
rc = ngx_stream_find_virtual_server(s, &host, &cscf);
if (rc == NGX_ERROR) {
goto error;
}
if (rc == NGX_DECLINED) {
goto done;
}
s->srv_conf = cscf->ctx->srv_conf;
ngx_set_connection_log(c, cscf->error_log);
sscf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module);
if (sscf->ssl.ctx) {
if (SSL_set_SSL_CTX(ssl_conn, sscf->ssl.ctx) == NULL) {
goto error;
}
/*
* SSL_set_SSL_CTX() only changes certs as of 1.0.0d
* adjust other things we care about
*/
SSL_set_verify(ssl_conn, SSL_CTX_get_verify_mode(sscf->ssl.ctx),
SSL_CTX_get_verify_callback(sscf->ssl.ctx));
SSL_set_verify_depth(ssl_conn, SSL_CTX_get_verify_depth(sscf->ssl.ctx));
#if OPENSSL_VERSION_NUMBER >= 0x009080dfL
/* only in 0.9.8m+ */
SSL_clear_options(ssl_conn, SSL_get_options(ssl_conn) &
~SSL_CTX_get_options(sscf->ssl.ctx));
#endif
SSL_set_options(ssl_conn, SSL_CTX_get_options(sscf->ssl.ctx));
#ifdef SSL_OP_NO_RENEGOTIATION
SSL_set_options(ssl_conn, SSL_OP_NO_RENEGOTIATION);
#endif
}
done:
sscf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module);
if (sscf->reject_handshake) {
c->ssl->handshake_rejected = 1;
*ad = SSL_AD_UNRECOGNIZED_NAME;
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
return SSL_TLSEXT_ERR_OK;
error:
*ad = SSL_AD_INTERNAL_ERROR;
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
#endif
#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
static int
ngx_stream_ssl_alpn_select(ngx_ssl_conn_t *ssl_conn, const unsigned char **out,
unsigned char *outlen, const unsigned char *in, unsigned int inlen,
void *arg)
{
ngx_str_t *alpn;
#if (NGX_DEBUG)
unsigned int i;
ngx_connection_t *c;
c = ngx_ssl_get_connection(ssl_conn);
for (i = 0; i < inlen; i += in[i] + 1) {
ngx_log_debug2(NGX_LOG_DEBUG_STREAM, c->log, 0,
"SSL ALPN supported by client: %*s",
(size_t) in[i], &in[i + 1]);
}
#endif
alpn = arg;
if (SSL_select_next_proto((unsigned char **) out, outlen, alpn->data,
alpn->len, in, inlen)
!= OPENSSL_NPN_NEGOTIATED)
{
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
ngx_log_debug2(NGX_LOG_DEBUG_STREAM, c->log, 0,
"SSL ALPN selected: %*s", (size_t) *outlen, *out);
return SSL_TLSEXT_ERR_OK;
}
#endif
#ifdef SSL_R_CERT_CB_ERROR
static int
ngx_stream_ssl_certificate(ngx_ssl_conn_t *ssl_conn, void *arg)
{
ngx_str_t cert, key;
ngx_uint_t i, nelts;
ngx_connection_t *c;
ngx_stream_session_t *s;
ngx_stream_ssl_srv_conf_t *sscf;
ngx_stream_complex_value_t *certs, *keys;
c = ngx_ssl_get_connection(ssl_conn);
if (c->ssl->handshaked) {
return 0;
}
s = c->data;
sscf = arg;
nelts = sscf->certificate_values->nelts;
certs = sscf->certificate_values->elts;
keys = sscf->certificate_key_values->elts;
for (i = 0; i < nelts; i++) {
if (ngx_stream_complex_value(s, &certs[i], &cert) != NGX_OK) {
return 0;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"ssl cert: \"%s\"", cert.data);
if (ngx_stream_complex_value(s, &keys[i], &key) != NGX_OK) {
return 0;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"ssl key: \"%s\"", key.data);
if (ngx_ssl_connection_certificate(c, c->pool, &cert, &key,
sscf->passwords)
!= NGX_OK)
{
return 0;
}
}
return 1;
}
#endif
static ngx_int_t
ngx_stream_ssl_static_variable(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
size_t len;
ngx_str_t str;
if (s->connection->ssl) {
(void) handler(s->connection, NULL, &str);
v->data = str.data;
for (len = 0; v->data[len]; len++) { /* void */ }
v->len = len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
v->not_found = 1;
return NGX_OK;
}
static ngx_int_t
ngx_stream_ssl_variable(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
ngx_str_t str;
if (s->connection->ssl) {
if (handler(s->connection, s->connection->pool, &str) != NGX_OK) {
return NGX_ERROR;
}
v->len = str.len;
v->data = str.data;
if (v->len) {
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
}
v->not_found = 1;
return NGX_OK;
}
// 添加ssl相关的变量
static ngx_int_t
ngx_stream_ssl_add_variables(ngx_conf_t *cf)
{
ngx_stream_variable_t *var, *v;
for (v = ngx_stream_ssl_vars; v->name.len; v++) {
var = ngx_stream_add_variable(cf, &v->name, v->flags);
if (var == NULL) {
return NGX_ERROR;
}
var->get_handler = v->get_handler;
var->data = v->data;
}
return NGX_OK;
}
static void *
ngx_stream_ssl_create_srv_conf(ngx_conf_t *cf)
{
ngx_stream_ssl_srv_conf_t *sscf;
sscf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_ssl_srv_conf_t));
if (sscf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* sscf->protocols = 0;
* sscf->certificate_values = NULL;
* sscf->dhparam = { 0, NULL };
* sscf->ecdh_curve = { 0, NULL };
* sscf->client_certificate = { 0, NULL };
* sscf->trusted_certificate = { 0, NULL };
* sscf->crl = { 0, NULL };
* sscf->alpn = { 0, NULL };
* sscf->ciphers = { 0, NULL };
* sscf->shm_zone = NULL;
*/
sscf->handshake_timeout = NGX_CONF_UNSET_MSEC;
sscf->certificates = NGX_CONF_UNSET_PTR;
sscf->certificate_keys = NGX_CONF_UNSET_PTR;
sscf->passwords = NGX_CONF_UNSET_PTR;
sscf->conf_commands = NGX_CONF_UNSET_PTR;
sscf->prefer_server_ciphers = NGX_CONF_UNSET;
sscf->reject_handshake = NGX_CONF_UNSET;
sscf->verify = NGX_CONF_UNSET_UINT;
sscf->verify_depth = NGX_CONF_UNSET_UINT;
sscf->builtin_session_cache = NGX_CONF_UNSET;
sscf->session_timeout = NGX_CONF_UNSET;
sscf->session_tickets = NGX_CONF_UNSET;
sscf->session_ticket_keys = NGX_CONF_UNSET_PTR;
return sscf;
}
static char *
ngx_stream_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_stream_ssl_srv_conf_t *prev = parent;
ngx_stream_ssl_srv_conf_t *conf = child;
ngx_pool_cleanup_t *cln;
ngx_conf_merge_msec_value(conf->handshake_timeout,
prev->handshake_timeout, 60000);
ngx_conf_merge_value(conf->session_timeout,
prev->session_timeout, 300);
ngx_conf_merge_value(conf->prefer_server_ciphers,
prev->prefer_server_ciphers, 0);
ngx_conf_merge_value(conf->reject_handshake, prev->reject_handshake, 0);
ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
(NGX_CONF_BITMASK_SET
|NGX_SSL_TLSv1|NGX_SSL_TLSv1_1
|NGX_SSL_TLSv1_2|NGX_SSL_TLSv1_3));
ngx_conf_merge_uint_value(conf->verify, prev->verify, 0);
ngx_conf_merge_uint_value(conf->verify_depth, prev->verify_depth, 1);
ngx_conf_merge_ptr_value(conf->certificates, prev->certificates, NULL);
ngx_conf_merge_ptr_value(conf->certificate_keys, prev->certificate_keys,
NULL);
ngx_conf_merge_ptr_value(conf->passwords, prev->passwords, NULL);
ngx_conf_merge_str_value(conf->dhparam, prev->dhparam, "");
ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate,
"");
ngx_conf_merge_str_value(conf->trusted_certificate,
prev->trusted_certificate, "");
ngx_conf_merge_str_value(conf->crl, prev->crl, "");
ngx_conf_merge_str_value(conf->alpn, prev->alpn, "");
ngx_conf_merge_str_value(conf->ecdh_curve, prev->ecdh_curve,
NGX_DEFAULT_ECDH_CURVE);
ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFAULT_CIPHERS);
ngx_conf_merge_ptr_value(conf->conf_commands, prev->conf_commands, NULL);
conf->ssl.log = cf->log;
if (conf->certificates) {
if (conf->certificate_keys == NULL
|| conf->certificate_keys->nelts < conf->certificates->nelts)
{
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"no \"ssl_certificate_key\" is defined "
"for certificate \"%V\"",
((ngx_str_t *) conf->certificates->elts)
+ conf->certificates->nelts - 1);
return NGX_CONF_ERROR;
}
} else if (!conf->reject_handshake) {
return NGX_CONF_OK;
}
if (ngx_ssl_create(&conf->ssl, conf->protocols, NULL) != NGX_OK) {
return NGX_CONF_ERROR;
}
cln = ngx_pool_cleanup_add(cf->pool, 0);
if (cln == NULL) {
ngx_ssl_cleanup_ctx(&conf->ssl);
return NGX_CONF_ERROR;
}
cln->handler = ngx_ssl_cleanup_ctx;
cln->data = &conf->ssl;
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
SSL_CTX_set_tlsext_servername_callback(conf->ssl.ctx,
ngx_stream_ssl_servername);
#endif
#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
if (conf->alpn.len) {
SSL_CTX_set_alpn_select_cb(conf->ssl.ctx, ngx_stream_ssl_alpn_select,
&conf->alpn);
}
#endif
if (ngx_ssl_ciphers(cf, &conf->ssl, &conf->ciphers,
conf->prefer_server_ciphers)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
if (ngx_stream_ssl_compile_certificates(cf, conf) != NGX_OK) {
return NGX_CONF_ERROR;
}
if (conf->certificate_values) {
#ifdef SSL_R_CERT_CB_ERROR
/* install callback to lookup certificates */
SSL_CTX_set_cert_cb(conf->ssl.ctx, ngx_stream_ssl_certificate, conf);
#else
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"variables in "
"\"ssl_certificate\" and \"ssl_certificate_key\" "
"directives are not supported on this platform");
return NGX_CONF_ERROR;
#endif
} else if (conf->certificates) {
/* configure certificates */
if (ngx_ssl_certificates(cf, &conf->ssl, conf->certificates,
conf->certificate_keys, conf->passwords)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
}
if (conf->verify) {
if (conf->client_certificate.len == 0 && conf->verify != 3) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"no ssl_client_certificate for ssl_verify_client");
return NGX_CONF_ERROR;
}
if (ngx_ssl_client_certificate(cf, &conf->ssl,
&conf->client_certificate,
conf->verify_depth)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
if (ngx_ssl_trusted_certificate(cf, &conf->ssl,
&conf->trusted_certificate,
conf->verify_depth)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
if (ngx_ssl_crl(cf, &conf->ssl, &conf->crl) != 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->certificates, 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