OpenSSL - OpenSSL "s_client -connect" - Connect to HTTPS Web Site

OpenSSL "s_client -connect" - Connect to HTTPS Web Site

Q

How to connect to a HTTPS Web site using OpenSSL? I see the Web sites using the "https:\" format.

✍: FYIcenter.com

A

If you see a Web sites using the "https:\" format, for example https://twitter.com/login/, you can try to connect the Web site using the "x509 -connect" command as shown below:

C:\Users\fyicenter>\local\openssl\openssl.exe

OpenSSL> s_client -connect www.twitter.com:443 -quiet

depth=1 C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert
nded Validation Server CA
verify error:num=20:unable to get local issuer certificate

<Ctrl-C>
read:errno=10093

Options used in these commands are:

"-connect www.twitter.com:443" - Establish a secure communication connection with server "www.twitter.com" at port # "443". Remember that HTTPS Web site uses the default port # 443.
"-quiet" - Do not print too much debugging information while establishing the connection.
"<Ctrl-C>" - Send the cancel signal to close the connection

⇒ OpenSSL "s_client -connect" - View Server Certificate

⇐ OpenSSL "s_client" Command Options

⇑ OpenSSL "s_client" Command

⇑⇑ OpenSSL Tutorials

2012-07-24, 12723👍, 0💬

OpenSSL "x509 -fingerprint" - Print Certificate Fingerprint
How to print out MD5 and SHA-1 fingerprints of a certificate using OpenSSL "x509" command? I need to see them and validate them with the owner of the certificate. Assuming you have a certificate file located at: C:\Users\fyicenter\twitter.crt ,you can print out certificate fingerprints using the "x5... 2012-07-23, 14339👍, 0💬

OpenSSL "s_client -connect" - Connect to HTTPS Web Site
How to connect to a HTTPS Web site using OpenSSL? I see the Web sites using the "https:\" format. If you see a Web sites using the "https:\" format, for example https://twitter.com/login/, you can try to connect the Web site using the "x509 -connect" command as shown below: C:\Users\fyicenter&gt... 2012-07-24, 12724👍, 0💬

OpenSSL "s_client" Command Options
What can I use OpenSSL "s_client" command for? What are options supported by the "s_client" command? OpenSSL "s_client" command implements a generic SSL/TLS client which can establish a transparent connection to a remote server speaking SSL/TLS. It's intended for testing purposes only and provides o... 2012-07-23, 11743👍, 0💬

OpenSSL "s_client -connect" - View Server Certificate
How to view the server certificate using the OpenSSL "s_client -connect" command? You can get the server certificate, if use "s_client -connect" without the "-quiet" option as shown below: C:\Users\fyicenter>\loc al\openssl\openssl.exeOpenSSL> s_client -connect www.twitter.com:443 CONN... 2012-07-24, 7682👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.