[tor-dev] Trivial patch: avoid redundant calls to ENGINE_register_all_complete

coderman coderman at gmail.com
Wed Dec 18 17:57:14 UTC 2013

hello all, Nick,

per the other thread in tor-talk about RDRAND, this is the minor fix
for OpenSSL 1.0.1+ mentioned.

i don't know that this is useful, and i am still giving the engine
code a thorough review per Nick's other feedback: "Above all, do not
that you understand how OpenSSL works until you have investigated with
a debugger, the source code, and a pot of coffee." :)

best regards,


diff --git a/src/common/crypto.c b/src/common/crypto.c
index 5afb98e..7c02ea4 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -282,7 +282,10 @@ crypto_global_init(int useAccel, const char
*accelName, const char *accelDir)

       log_info(LD_CRYPTO, "Initializing OpenSSL engine support.");
-      ENGINE_register_all_complete();
+      /* OpenSSL 1.0.1 and newer register complete when engines loaded. */
+      if (SSLeay() < OPENSSL_V_SERIES(1,0,1)) {
+        ENGINE_register_all_complete();
+      }

       if (accelName) {
         if (accelDir) {

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