Apache Error After Upgrade: Cannot load module mod_ssl.so: undefined symbol: SSL_get_srp_userinfo"

Question

After I upgrade the Apache to version 2.4.12, its giving error at the time of start. I used below commands to install apache.

   ./configure --prefix=/usr/local/apache2 --enable-so --enable-ssl --enable-mod_shared=all
make clean all
make
make install

I replaced the new httpd.conf with my old httpd.conf and now While starting apache, I get below error.

httpd: Syntax error on line 148 of /usr/local/apache2/conf/httpd.conf: Cannot load modules/mod_ssl.so into server: /usr/local/apache2/modules/mod_ssl.so: undefined symbol: SSL_get_srp_userinfo

Can anyone tell if I am missing anything and how to resolve it now.

Answer 1

httpd: Syntax error on line 148 of /usr/local/apache2/conf/httpd.conf: Cannot load modules/mod_ssl.so into server: /usr/local/apache2/modules/mod_ssl.so: undefined symbol: SSL_get_srp_userinfo

SSL_get_srp_userinfo is part of libssl (and not libcrypto), presuming you did not Configure with no-srp:

$ nm ./libSSL.dylib | grep SSL_get_srp_userinfo
0000000000038830 T _SSL_get_srp_userinfo

So it sounds like your problem is with your mod_ssl.so or libssl.so. You should ensure libssl.so includes SRP, and you should ensure mod_ssl.so uses a version of libssl that includes SRP.