* How do I install a CA certificate into a browser?
* Why is OpenSSL x509 DN output not conformant to RFC2253?
* What is a "128 bit certificate"? Can I create one with OpenSSL?
+* Why does OpenSSL set the authority key identifier extension incorrectly?
[BUILD] Questions about building and testing OpenSSL
* Which is the current version of OpenSSL?
The current version is available from <URL: http://www.openssl.org>.
-OpenSSL 0.9.8a was released on October 11th, 2005.
+OpenSSL 0.9.8b was released on May 4th, 2006.
In addition to the current stable release, you can also access daily
snapshots of the OpenSSL development version at <URL:
need to any more. Nowadays web browsers using unrestricted strong encryption
are generally available.
-When there were tight export restrictions on the export of strong encryption
+When there were tight restrictions on the export of strong encryption
software from the US only weak encryption algorithms could be freely exported
(initially 40 bit and then 56 bit). It was widely recognised that this was
-inadequate. A relaxation the rules allowed the use of strong encryption but
+inadequate. A relaxation of the rules allowed the use of strong encryption but
only to an authorised server.
Two slighly different techniques were developed to support this, one used by
encryption so these certificates are now obsolete.
+* Why does OpenSSL set the authority key identifier (AKID) extension incorrectly?
+
+It doesn't: this extension is often the cause of confusion.
+
+Consider a certificate chain A->B->C so that A signs B and B signs C. Suppose
+certificate C contains AKID.
+
+The purpose of this extension is to identify the authority certificate B. This
+can be done either by including the subject key identifier of B or its issuer
+name and serial number.
+
+In this latter case because it is identifying certifcate B it must contain the
+issuer name and serial number of B.
+
+It is often wrongly assumed that it should contain the subject name of B. If it
+did this would be redundant information because it would duplicate the issuer
+name of C.
+
+
[BUILD] =======================================================================
* Why does the linker complain about undefined symbols?
file.
Multi-threaded applications must provide two callback functions to
-OpenSSL. This is described in the threads(3) manpage.
-
+OpenSSL by calling CRYPTO_set_locking_callback() and
+CRYPTO_set_id_callback(). (For OpenSSL 0.9.9 or later, the new
+function CRYPTO_set_idptr_callback() may be used in place of
+CRYPTO_set_id_callback().) This is described in the threads(3)
+manpage.
* I've compiled a program under Windows and it crashes: why?