Added --library-versions flag to print the compile time and runtime versions of libevent, openssl and zlib. Partially implements #6384.

6 files changed, 60 insertions, 13 deletions

diff --git a/src/common/compat_libevent.c b/src/common/compat_libevent.c
index 200a7c65fb..4d0fff833b 100644
--- a/src/common/compat_libevent.c
+++ b/src/common/compat_libevent.c
@@ -415,6 +415,14 @@ tor_check_libevent_version(const char *m, int server,
 #define HEADER_VERSION _EVENT_VERSION
 #endif
 
+/** Return a string representation of the version of Libevent that was used
+* at compilation time. */
+const char *
+tor_libevent_get_header_version_str(void)
+{
+  return HEADER_VERSION;
+}
+
 /** See whether the headers we were built against differ from the library we
  * linked against so much that we're likely to crash.  If so, warn the
  * user. */
diff --git a/src/common/compat_libevent.h b/src/common/compat_libevent.h
index 2472e2c49e..fda8733592 100644
--- a/src/common/compat_libevent.h
+++ b/src/common/compat_libevent.h
@@ -78,6 +78,7 @@ void tor_check_libevent_version(const char *m, int server,
                                 const char **badness_out);
 void tor_check_libevent_header_compatibility(void);
 const char *tor_libevent_get_version_str(void);
+const char *tor_libevent_get_header_version_str(void);
 
 #ifdef USE_BUFFEREVENTS
 const struct timeval *tor_libevent_get_one_tick_timeout(void);
diff --git a/src/common/crypto.c b/src/common/crypto.c
index 6f1a0bca57..5be3327b81 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -195,6 +195,24 @@ try_load_engine(const char *path, const char *engine)
 }
 #endif
 
+static char *
+parse_openssl_version_str(const char *raw_version)
+{
+  const char *end_of_version = NULL;
+  /* The output should be something like "OpenSSL 1.0.0b 10 May 2012. Let's
+     trim that down. */
+  if (!strcmpstart(raw_version, "OpenSSL ")) {
+    raw_version += strlen("OpenSSL ");
+    end_of_version = strchr(raw_version, ' ');
+  }
+
+  if (end_of_version)
+    return tor_strndup(raw_version,
+                      end_of_version-raw_version);
+  else
+    return tor_strdup(raw_version);
+}
+
 static char *crypto_openssl_version_str = NULL;
 /* Return a human-readable version of the run-time openssl version number. */
 const char *
@@ -202,23 +220,20 @@ crypto_openssl_get_version_str(void)
 {
   if (crypto_openssl_version_str == NULL) {
     const char *raw_version = SSLeay_version(SSLEAY_VERSION);
-    const char *end_of_version = NULL;
-    /* The output should be something like "OpenSSL 1.0.0b 10 May 2012. Let's
-       trim that down. */
-    if (!strcmpstart(raw_version, "OpenSSL ")) {
-      raw_version += strlen("OpenSSL ");
-      end_of_version = strchr(raw_version, ' ');
-    }
-
-    if (end_of_version)
-      crypto_openssl_version_str = tor_strndup(raw_version,
-                                               end_of_version-raw_version);
-    else
-      crypto_openssl_version_str = tor_strdup(raw_version);
+    crypto_openssl_version_str = parse_openssl_version_str(raw_version);
   }
   return crypto_openssl_version_str;
 }
 
+/* Return a human-readable version of the compile-time openssl version
+* number. */
+const char *
+crypto_openssl_get_header_version_str(void)
+{
+  //return OPENSSL_VERSION_TEXT;
+  return parse_openssl_version_str(OPENSSL_VERSION_TEXT);
+}
+
 /** Initialize the crypto library.  Return 0 on success, -1 on failure.
  */
 int
diff --git a/src/common/crypto.h b/src/common/crypto.h
index 2750ed8109..6ce3697c92 100644
--- a/src/common/crypto.h
+++ b/src/common/crypto.h
@@ -109,6 +109,7 @@ typedef struct crypto_dh_t crypto_dh_t;
 
 /* global state */
 const char * crypto_openssl_get_version_str(void);
+const char * crypto_openssl_get_header_version_str(void);
 int crypto_global_init(int hardwareAccel,
                        const char *accelName,
                        const char *accelPath);
diff --git a/src/common/torgzip.c b/src/common/torgzip.c
index 4328c63c8b..15451ee30d 100644
--- a/src/common/torgzip.c
+++ b/src/common/torgzip.c
@@ -68,6 +68,22 @@ is_gzip_supported(void)
   return gzip_is_supported;
 }
 
+/** Return a string representation of the version of the currently running
+ * version of zlib. */
+const char *
+tor_zlib_get_version_str(void)
+{
+  return zlibVersion();
+}
+
+/** Return a string representation of the version of the version of zlib
+* used at compilation. */
+const char *
+tor_zlib_get_header_version_str(void)
+{
+  return ZLIB_VERSION;
+}
+
 /** Return the 'bits' value to tell zlib to use <b>method</b>.*/
 static INLINE int
 method_bits(compress_method_t method)
diff --git a/src/common/torgzip.h b/src/common/torgzip.h
index be1016445b..5db03fe6e0 100644
--- a/src/common/torgzip.h
+++ b/src/common/torgzip.h
@@ -32,6 +32,12 @@ tor_gzip_uncompress(char **out, size_t *out_len,
 
 int is_gzip_supported(void);
 
+const char *
+tor_zlib_get_version_str(void);
+
+const char *
+tor_zlib_get_header_version_str(void);
+
 compress_method_t detect_compression_method(const char *in, size_t in_len);
 
 /** Return values from tor_zlib_process; see that function's documentation for