When installing Nginx from source on a CentOS 7 server, I got the following error
checking for OpenSSL library ... not found checking for OpenSSL library in /usr/local/ ... not found checking for OpenSSL library in /usr/pkg/ ... not found checking for OpenSSL library in /opt/local/ ... not found
To fix the error, install openssl-devel package with the command
yum install openssl-devel -y
Back to Errors
OpenSSL command can be used to verify if an SSL certificate matches a private key file. You need to find the checksum for the SSL certificate and Private key, if both checksums are the same, then the key matches.
To make this process easier, I created a PHP script to verify if the SSL certificate matches the private key provided.
Create a file
mkdir ~/bin/ vi ~/bin/ssl-verify
Add following content
#!/usr/bin/phpMake it executable
chmod 755 ~/bin/ssl-verifyTo verify an SSL and key file, go to the folder where the SSL certificate and key file are present, then run the command
ssl-verify
To encrypt a file, run
openssl enc -aes-256-cbc -in FILE -out FILE.enc
To decrypt, use
openssl enc -d -aes-256-cbc -in FILE.enc -out FILE
You can use -k option to provide password in commend line itself so it won’t prompt for password.
Here is a script i use to take backup
boby@hon-pc-01:~$ cat ~/bin/backup-my-files #!/bin/bash cd $HOME/work/ rm -f myfiles.tar.gz myfiles.tar.gz.openssl tar --exclude='MY_FILES/.git' -zcvf myfiles.tar.gz MY_FILES openssl enc -aes-256-cbc -in /home/boby/work/myfiles.tar.gz -out myfiles.tar.gz.openssl echo "Backup available in folder $HOME/work" echo "You can decrypt file using" echo "" echo "openssl enc -d -aes-256-cbc -in myfiles.tar.gz.openssl -out myfiles.tar.gz" boby@hon-pc-01:~$
View SSL certificate details
openssl x509 -in ssl.crt -text -noout
To get SSL certificate details of a web site
timeout 5 echo QUIT | openssl s_client -connect serverok.in:443 2>&1 | openssl x509 -noout -text