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OpenSSL Cheat Sheet

Generate Self-Signed Certificate and Private Key

openssl genrsa -des3 -passout pass:x -out server.pass.key 2048 && openssl rsa -passin pass:x -in server.pass.key -out server.key && openssl req -new -key server.key -out server.csr
openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt
  • Use server.crt and server.key

Encypt/Decrypt file

# Encrypt
openssl aes-128-cbc -a -e -pass pass:test -in vars -out vars.enc
# Puts encrypted data into vars.enc file

# Decrypt
openssl aes-128-cbc -a -d -pass pass:test -in vars.enc
# Outputs decrypted data to STDOUT

NOTE: See openssl passpharse arguments for information on using the password on the commandline. It can be changed to a file or an environment variable.