Mercurial > hg > nginx
view src/event/ngx_event_openssl.h @ 5095:4fbef397c753
SNI: added restriction on requesting host other than negotiated.
According to RFC 6066, client is not supposed to request a different server
name at the application layer. Server implementations that rely upon these
names being equal must validate that a client did not send a different name
in HTTP request. Current versions of Apache HTTP server always return 400
"Bad Request" in such cases.
There exist implementations however (e.g., SPDY) that rely on being able to
request different host names in one connection. Given this, we only reject
requests with differing host names if verification of client certificates
is enabled in a corresponding server configuration.
An example of configuration that might not work as expected:
server {
listen 433 ssl default;
return 404;
}
server {
listen 433 ssl;
server_name example.org;
ssl_client_certificate org.cert;
ssl_verify_client on;
}
server {
listen 433 ssl;
server_name example.com;
ssl_client_certificate com.cert;
ssl_verify_client on;
}
Previously, a client was able to request example.com by presenting
a certificate for example.org, and vice versa.
| author | Valentin Bartenev <vbart@nginx.com> |
|---|---|
| date | Wed, 27 Feb 2013 17:41:34 +0000 |
| parents | e406c997470a |
| children | 71d85de7b53b |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_OPENSSL_H_INCLUDED_ #define _NGX_EVENT_OPENSSL_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <openssl/ssl.h> #include <openssl/err.h> #include <openssl/conf.h> #include <openssl/engine.h> #include <openssl/evp.h> #include <openssl/ocsp.h> #define NGX_SSL_NAME "OpenSSL" #define ngx_ssl_session_t SSL_SESSION #define ngx_ssl_conn_t SSL typedef struct { SSL_CTX *ctx; ngx_log_t *log; } ngx_ssl_t; typedef struct { ngx_ssl_conn_t *connection; ngx_int_t last; ngx_buf_t *buf; ngx_connection_handler_pt handler; ngx_event_handler_pt saved_read_handler; ngx_event_handler_pt saved_write_handler; unsigned handshaked:1; unsigned renegotiation:1; unsigned buffer:1; unsigned no_wait_shutdown:1; unsigned no_send_shutdown:1; } ngx_ssl_connection_t; #define NGX_SSL_NO_SCACHE -2 #define NGX_SSL_NONE_SCACHE -3 #define NGX_SSL_NO_BUILTIN_SCACHE -4 #define NGX_SSL_DFLT_BUILTIN_SCACHE -5 #define NGX_SSL_MAX_SESSION_SIZE 4096 typedef struct ngx_ssl_sess_id_s ngx_ssl_sess_id_t; struct ngx_ssl_sess_id_s { ngx_rbtree_node_t node; u_char *id; size_t len; u_char *session; ngx_queue_t queue; time_t expire; #if (NGX_PTR_SIZE == 8) void *stub; u_char sess_id[32]; #endif }; typedef struct { ngx_rbtree_t session_rbtree; ngx_rbtree_node_t sentinel; ngx_queue_t expire_queue; } ngx_ssl_session_cache_t; #define NGX_SSL_SSLv2 0x0002 #define NGX_SSL_SSLv3 0x0004 #define NGX_SSL_TLSv1 0x0008 #define NGX_SSL_TLSv1_1 0x0010 #define NGX_SSL_TLSv1_2 0x0020 #define NGX_SSL_BUFFER 1 #define NGX_SSL_CLIENT 2 #define NGX_SSL_BUFSIZE 16384 ngx_int_t ngx_ssl_init(ngx_log_t *log); ngx_int_t ngx_ssl_create(ngx_ssl_t *ssl, ngx_uint_t protocols, void *data); ngx_int_t ngx_ssl_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, ngx_str_t *key); ngx_int_t ngx_ssl_client_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, ngx_int_t depth); ngx_int_t ngx_ssl_trusted_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, ngx_int_t depth); ngx_int_t ngx_ssl_crl(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *crl); ngx_int_t ngx_ssl_stapling(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file, ngx_str_t *responder, ngx_uint_t verify); ngx_int_t ngx_ssl_stapling_resolver(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_resolver_t *resolver, ngx_msec_t resolver_timeout); RSA *ngx_ssl_rsa512_key_callback(SSL *ssl, int is_export, int key_length); ngx_int_t ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file); ngx_int_t ngx_ssl_ecdh_curve(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *name); ngx_int_t ngx_ssl_session_cache(ngx_ssl_t *ssl, ngx_str_t *sess_ctx, ssize_t builtin_session_cache, ngx_shm_zone_t *shm_zone, time_t timeout); ngx_int_t ngx_ssl_session_cache_init(ngx_shm_zone_t *shm_zone, void *data); ngx_int_t ngx_ssl_create_connection(ngx_ssl_t *ssl, ngx_connection_t *c, ngx_uint_t flags); void ngx_ssl_remove_cached_session(SSL_CTX *ssl, ngx_ssl_session_t *sess); ngx_int_t ngx_ssl_set_session(ngx_connection_t *c, ngx_ssl_session_t *session); #define ngx_ssl_get_session(c) SSL_get1_session(c->ssl->connection) #define ngx_ssl_free_session SSL_SESSION_free #define ngx_ssl_get_connection(ssl_conn) \ SSL_get_ex_data(ssl_conn, ngx_ssl_connection_index) #define ngx_ssl_get_server_conf(ssl_ctx) \ SSL_CTX_get_ex_data(ssl_ctx, ngx_ssl_server_conf_index) #define ngx_ssl_verify_error_optional(n) \ (n == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT \ || n == X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN \ || n == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY \ || n == X509_V_ERR_CERT_UNTRUSTED \ || n == X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE) ngx_int_t ngx_ssl_get_protocol(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s); ngx_int_t ngx_ssl_get_cipher_name(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s); ngx_int_t ngx_ssl_get_session_id(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s); ngx_int_t ngx_ssl_get_raw_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s); ngx_int_t ngx_ssl_get_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s); ngx_int_t ngx_ssl_get_subject_dn(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s); ngx_int_t ngx_ssl_get_issuer_dn(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s); ngx_int_t ngx_ssl_get_serial_number(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s); ngx_int_t ngx_ssl_get_client_verify(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s); ngx_int_t ngx_ssl_handshake(ngx_connection_t *c); ssize_t ngx_ssl_recv(ngx_connection_t *c, u_char *buf, size_t size); ssize_t ngx_ssl_write(ngx_connection_t *c, u_char *data, size_t size); ssize_t ngx_ssl_recv_chain(ngx_connection_t *c, ngx_chain_t *cl); ngx_chain_t *ngx_ssl_send_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit); void ngx_ssl_free_buffer(ngx_connection_t *c); ngx_int_t ngx_ssl_shutdown(ngx_connection_t *c); void ngx_cdecl ngx_ssl_error(ngx_uint_t level, ngx_log_t *log, ngx_err_t err, char *fmt, ...); void ngx_ssl_cleanup_ctx(void *data); extern int ngx_ssl_connection_index; extern int ngx_ssl_server_conf_index; extern int ngx_ssl_session_cache_index; extern int ngx_ssl_certificate_index; extern int ngx_ssl_stapling_index; #endif /* _NGX_EVENT_OPENSSL_H_INCLUDED_ */