1 files changed, 78 insertions, 0 deletions
diff --git a/src/nxt_tls.h b/src/nxt_tls.h
new file mode 100644
index 00000000..6f342edd
--- /dev/null
+++ b/src/nxt_tls.h
@@ -0,0 +1,78 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#ifndef _NXT_TLS_H_INCLUDED_
+#define _NXT_TLS_H_INCLUDED_
+
+
+/*
+ * The SSL/TLS libraries lack vector I/O interface yet add noticeable
+ * overhead to each SSL/TLS record so buffering allows to decrease the
+ * overhead.  The typical overhead size is about 30 bytes, however, TLS
+ * supports also random padding up to 255 bytes.  The maximum SSLv3/TLS
+ * record size is 16K.  However, large records increase decryption latency.
+ * 4K is good compromise between 1-6% of SSL/TLS overhead and the latency.
+ * 4K buffer allows to send one SSL/TLS record (4096-bytes data and up to
+ * 224-bytes overhead) in three 1440-bytes TCP/IPv4 packets with timestamps
+ * and compatible with tunnels.
+ */
+
+#define NXT_TLS_BUFFER_SIZE       4096
+
+
+typedef struct nxt_tls_conf_s     nxt_tls_conf_t;
+
+
+typedef struct {
+    nxt_int_t                     (*library_init)(nxt_task_t *task);
+    void                          (*library_free)(nxt_task_t *task);
+
+    nxt_int_t                     (*server_init)(nxt_task_t *task,
+                                      nxt_tls_conf_t *conf);
+    void                          (*server_free)(nxt_task_t *task,
+                                      nxt_tls_conf_t *conf);
+} nxt_tls_lib_t;
+
+
+struct nxt_tls_conf_s {
+    void                          *ctx;
+    void                          (*conn_init)(nxt_task_t *task,
+                                      nxt_tls_conf_t *conf, nxt_conn_t *c);
+
+    const nxt_tls_lib_t           *lib;
+
+    char                          *certificate;
+    char                          *certificate_key;
+    char                          *ciphers;
+
+    char                          *ca_certificate;
+
+    size_t                        buffer_size;
+};
+
+
+#if (NXT_HAVE_OPENSSL)
+extern const nxt_tls_lib_t        nxt_openssl_lib;
+
+void nxt_cdecl nxt_openssl_log_error(nxt_task_t *task, nxt_uint_t level,
+    const char *fmt, ...);
+u_char *nxt_openssl_copy_error(u_char *p, u_char *end);
+#endif
+
+#if (NXT_HAVE_GNUTLS)
+extern const nxt_tls_lib_t        nxt_gnutls_lib;
+#endif
+
+#if (NXT_HAVE_CYASSL)
+extern const nxt_tls_lib_t        nxt_cyassl_lib;
+#endif
+
+#if (NXT_HAVE_POLARSSL)
+extern const nxt_tls_lib_t        nxt_polar_lib;
+#endif
+
+
+#endif /* _NXT_TLS_H_INCLUDED_ */