I got a password protected RSA private key with headers like (I have the password):
-----BEGIN RSA PRIVATE KEY----- Proc-Type: 4,ENCRYPTED DEK-Info: AES-256-CBC,...
How to decrypt a password protected RSA private key?
openssl rsa -in /path/to/encrypted/key -out /paht/to/decrypted/key
For example, if you have a encrypted key file ssl.key and you want to decrypt it and store it as mykey.key, the command will be
openssl rsa -in ssl.key -out mykey.key