If you take a look at the OpenSSL sources there are a lot of CONFerr() statements. CONFerr is defined in ./err/err.h and calls ERR_PUT_error(). The only way to silently ignore conf errors is to compile OpenSSL with a OPENSSL_NO_ERR flag. But then you suppress all errors, not only the config ones.

If OpenSSL really wants to silently ignore conf errors this line:

        #define CONFerr(f,r) ERR_PUT_error(ERR_LIB_CONF,(f),(r),__FILE__,__LINE__)

has to be changed into

        #define CONFerr(f,r) ERR_PUT_error(ERR_LIB_CONF,(f),(r),NULL,0)

Now that I have a situation with a fatal config error, I can test it. I will recompile OpenSSL with the changes above and see if it removes the fatality.

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** [bugs:#1401] STR_COPY:variable has no value**
**Status:** open
**Labels:** openssl VC9 VC11 Windows 2008 
**Created:** Sun Jul 27, 2014 06:54 AM UTC by Jan-E
**Last Updated:** Sun Jul 27, 2014 10:36 PM UTC
**Owner:** Daniel Stenberg
I got this error after upgrading to libcurl 7.37.1 and compiling php_curl.dll with it on Windows
	C:\phpdev\php55nts.x32>php -v
	Auto configuration failed
	7140:error:0E065068:configuration file routines:STR_COPY:variable has no value:.
	\crypto\conf\conf_def.c:618:line 37
To analyze what went wrong, I went back to libcurl 7.37.0 and applied the openssl patches since that release:
7.37.0 unpatched: OK
7.37.0 with the 'Fix uninitialized variable use in NPN callback': still OK
7.37.0 with the additional 'call OPENSSL_config for initing engines' patch: error
So this commit broke it on my server:
https://github.com/bagder/curl/commit/c50ce859187cabecee5470a95a51c35bf73d3c47
OS: Windows 2008 R2
OpenSSL 1.0.1h
PHP-versions: 5.3-29-dev, 5.4.31, 5.5.15
So it happened both with PHP compiled with VC9 (5.3, 5.4) as with PHP compiled with VC11 (5.5).
Other point that is relevant: it only happened on the production server. I could not reproduce it on the developmet server, which runs Windows 2008 R2 as well. And also on my laptop with Windows 7 it did not happen.
Furthermore: it went wrong with every php-extension that used libcurl (php_http.dll for instance).
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