I am using Evernote Ruby API to develop a web application(using rails and oauth). But while running the application in Ubuntu 12.04 I am getting an error "SSL_connect SYSCALL returned=5 errno=0 state=unknown state." This happens only in ubuntu 12.04. Ubuntu versions < 12.04 doesnt have this problem.
What is your current SSL_Cert_file environmental variable set to? Try setting the SSL_Cert_file environmental variable to:
export SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt
If that doesn't work and you are using RVM maybe setting the path to: ~/.rvm/usr/ssl/cert.pem
Before you make any changes just note down what the path currently is so that you can set it back if needed.
This issue is being caused by a known bug in Ubuntu openssl 1.0.1:
https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/965371
https://serverfault.com/questions/389197/ssl-routinesssl23-writessl-handshake-failure
Unfortunately, there's a lot of fingerpointing going on and no fixes. If you're running Ruby 1.9 you can force the SSL version to either TLSv1 or SSLv3 to fix it (the problem is with TLSv1.1):
来源：https://stackoverflow.com/questions/10847779/opensslsslsslerror-ubuntu-12-04-only