1 files changed, 85 insertions, 0 deletions
diff --git a/src/common/crypto_openssl_mgt.h b/src/common/crypto_openssl_mgt.h
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+++ b/src/common/crypto_openssl_mgt.h
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+/* Copyright (c) 2001, Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2017, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file crypto_openssl.h
+ *
+ * \brief Headers for crypto_openssl.c
+ **/
+
+#ifndef TOR_CRYPTO_OPENSSL_H
+#define TOR_CRYPTO_OPENSSL_H
+
+#include <stdio.h>
+#include "util.h"
+
+#include <openssl/engine.h>
+
+/*
+  Macro to create an arbitrary OpenSSL version number as used by
+  OPENSSL_VERSION_NUMBER or SSLeay(), since the actual numbers are a bit hard
+  to read.
+
+  Don't use this directly, instead use one of the other OPENSSL_V macros
+  below.
+
+  The format is: 4 bits major, 8 bits minor, 8 bits fix, 8 bits patch, 4 bit
+  status.
+ */
+#define OPENSSL_VER(a,b,c,d,e)                                \
+  (((a)<<28) |                                                \
+   ((b)<<20) |                                                \
+   ((c)<<12) |                                                \
+   ((d)<< 4) |                                                \
+    (e))
+/** An openssl release number.  For example, OPENSSL_V(0,9,8,'j') is the
+ * version for the released version of 0.9.8j */
+#define OPENSSL_V(a,b,c,d) \
+  OPENSSL_VER((a),(b),(c),(d)-'a'+1,0xf)
+/** An openssl release number for the first release in the series.  For
+ * example, OPENSSL_V_NOPATCH(1,0,0) is the first released version of OpenSSL
+ * 1.0.0. */
+#define OPENSSL_V_NOPATCH(a,b,c) \
+  OPENSSL_VER((a),(b),(c),0,0xf)
+/** The first version that would occur for any alpha or beta in an openssl
+ * series. For example, OPENSSL_V_SERIES(0,9,8) is greater than any released
+ * 0.9.7, and less than any released 0.9.8. */
+#define OPENSSL_V_SERIES(a,b,c) \
+  OPENSSL_VER((a),(b),(c),0,0)
+
+#ifdef ANDROID
+/* Android's OpenSSL seems to have removed all of its Engine support. */
+#define DISABLE_ENGINES
+#endif
+
+#if OPENSSL_VERSION_NUMBER >= OPENSSL_VER(1,1,0,0,5) && \
+  !defined(LIBRESSL_VERSION_NUMBER)
+/* OpenSSL as of 1.1.0pre4 has an "new" thread API, which doesn't require
+ * seting up various callbacks.
+ *
+ * OpenSSL 1.1.0pre4 has a messed up `ERR_remove_thread_state()` prototype,
+ * while the previous one was restored in pre5, and the function made a no-op
+ * (along with a deprecated annotation, which produces a compiler warning).
+ *
+ * While it is possible to support all three versions of the thread API,
+ * a version that existed only for one snapshot pre-release is kind of
+ * pointless, so let's not.
+ */
+#define NEW_THREAD_API
+#endif /* OPENSSL_VERSION_NUMBER >= OPENSSL_VER(1,1,0,0,5) && ... */
+
+/* global openssl state */
+const char * crypto_openssl_get_version_str(void);
+const char * crypto_openssl_get_header_version_str(void);
+
+/* OpenSSL threading setup function */
+int setup_openssl_threading(void);
+
+/* Tor OpenSSL utility functions */
+void crypto_openssl_free_all(void);
+
+#endif /* !defined(TOR_CRYPTO_OPENSSL_H) */
+