[openssl-commits] [openssl] master update

Rich Salz rsalz at openssl.org
Tue May 5 16:01:00 UTC 2015

The branch master has been updated
       via  a28ef860be371e45f4818b22be378519538d70f9 (commit)
      from  ff660b93126931ec37b4c4734e4ad4f4ef3c81db (commit)

- Log -----------------------------------------------------------------
commit a28ef860be371e45f4818b22be378519538d70f9
Author: Rich Salz <rsalz at akamai.com>
Date:   Mon May 4 11:54:26 2015 -0400

    Update multi-thread FAQ
    Reviewed-by: Matt Caswell <matt at openssl.org>


Summary of changes:
 FAQ | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/FAQ b/FAQ
index 75fc9ac..2579d51 100644
--- a/FAQ
+++ b/FAQ
@@ -789,18 +789,15 @@ considered to be security issues.
 * Is OpenSSL thread-safe?
-Yes (with limitations: an SSL connection may not concurrently be used
-by multiple threads).  On Windows and many Unix systems, OpenSSL
-automatically uses the multi-threaded versions of the standard
-libraries.  If your platform is not one of these, consult the INSTALL
-Multi-threaded applications must provide two callback functions to
-OpenSSL by calling CRYPTO_set_locking_callback() and
-CRYPTO_set_id_callback(), for all versions of OpenSSL up to and
-including 0.9.8[abc...]. As of version 1.0.0, CRYPTO_set_id_callback()
-and associated APIs are deprecated by CRYPTO_THREADID_set_callback()
-and friends. This is described in the threads(3) manpage.
+Provided an application sets up the thread callback functions, the
+answer is yes. There are limitations; for example, an SSL connection
+cannot be used concurrently by multiple threads.  This is true for
+most OpenSSL objects.
+To do this, your application must call CRYPTO_set_locking_callback()
+and one of the CRYPTO_THREADID_set...() API's.  See the OpenSSL threads
+manpage for details and "note on multi-threading" in the INSTALL file in
+the source distribution.
 * I've compiled a program under Windows and it crashes: why?

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