Network Security with OpenSSL

Name

rsa

Synopsis

The rsa command is used modify RSA private keys or examine their contents. The command may be used to remove encryption from a private key, add it to a private key, or change the encryption that is used on a private key. The command can also be used to compute a public key from a private key.

Options

-in filename

Specify the name of a file from which an RSA private key will be read. If no file is specified, stdin is used.

-inform DER|NET|PEM

Specify the format—DER, NET, or PEM—of the key that is read as input. If this option is omitted, the default format is PEM.

-out filename

Specify the name of a file to which the output from this command will be written. If this option is omitted, stdout will be used.

-outform DER|NET|PEM

Specify the format—DER, NET or PEM—of the key that is written. If this option is omitted, the default format is PEM.

-pubin

Cause the input key to be interpreted as a public key.

-pubout

Cause the output key to be interpreted as a public key.

-passin password

Specify the password to use to decrypt the input key. This option follows the password and passphrase guidelines outlined in Chapter 2.

-passout password

Specify the password to use to encrypt the output key. This option follows the password and passphrase guidelines outlined in Chapter 2.

-des, -des3, -idea

Specify the cipher to use to encrypt the private key. If this option is omitted, the private key that is written out by this command will not be encrypted.

-noout

Cause the output ...