OpenSSL

• Use RSA with OpenSSL on Mac

• Generate RSA key:

  $ openssl genrsa -out key.pem 1024

• Save public key in pub.pem file:

  $ openssl rsa -in key.pem -pubout -out pub.pem

• Encrypt some data:

  $ echo test test test > file.txt 
  $ openssl rsautl -encrypt -inkey pub.pem -pubin -in file.txt -out file.bin

• Decrypt encrypted data:

  openssl rsautl -decrypt -inkey key.pem -in file.bin