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NAME

uftp_keymgt - Encrypted UDP based ftp with multicast - key management utility

SYNOPSIS

uftp_keymgt [ -m ] [ key_file [ key_file ...] ]

uftp_keymgt [ -m ] -g { rsa:key_length | ec:curve } key_file

uftp_keymgt [ -m ] -d key_file

DESCRIPTION

uftp_keymgt is a utility for creating, viewing, and deleting RSA and EC private keys used by the UFTP suite. Although keys can be generated on the fly by uftp(1), uftpd(1), and uftpproxyd(1), this utility gives a more straightforward way of doing so without having to kick off a dummy process just to create/view a key.

The definition of key_file is dependent on the crypto library UFTP is compiled to use.

On Windows systems, UFTP can built to use either CNG, which is the new API supported by Windows Vista and Windows 7, or CryptoAPI, which is the legacy API and the only one available to Windows XP.

Under CryptoAPI, all RSA private keys must be stored in a key container (technically only keys used to sign data, but for UFTP's purposes this is the case). Key containers are internal to Windows, and each user (and the system) has its own set of key containers. In this case, key_file is actually the name of the key container. Elliptic Curve algorithms are not supported under CryptoAPI.

Under CNG, RSA and ECDSA private keys are also stored in key containers, and RSA keys created by CrypoAPI may be read by CNG. Like CryptoAPI, key_file also specifies the key container name. CNG only supports 3 named EC curves: prime256v1, secp384r1, and secp521r1.

All other systems use OpenSSL for the crypto library (although under Windows UFTP can be also be built to use it). In this case, key_file specifies a file name where the RSA or ECDSA private key is stored unencrypted in PEM format (the OS is expected to protect this file).

The -g option is used to generate a key of a given type and store it in the given key_file. The key size and key fingerprint are then printed. Under OpenSSL, a key can actually be generated by the openssl(1) command line utility, although you'll still need to run uftp_keymgt on it to see the fingerprint.

The -d option is available only on Windows systems using CryptoAPI or CNG. It deletes the key container specified by key_file.

When neither -g or -d are specified, the type and fingerprint of all keys listed are printed. If no keys are specified under Windows with CryptoAPI or CNG, the private key for all key containers for the current user are printed. Note that some key containers may exist that an application other than UFTP is using, and some of those may not have an RSA or EC private key.

OPTIONS

The following options are supported:
-g  { rsa:key_length | ec:curve } key_file

Specifies the type of new key and the key_file to store it in. New keys are specified as either rsa:key_length, which creates an RSA private key key_length bits wide, or as ec:curve, which creates an EC key using the curve "curve".

The list of supported EC curves is as follows (availability may vary depending on system settings and crypto library used):

sect163k1 sect163r1 sect163r2 sect193r1 sect193r2 sect233k1 sect233r1 sect239k1 sect283k1 sect283r1 sect409k1 sect409r1 sect571k1 sect571r1 secp160k1 secp160r1 secp160r2 secp192k1 prime192v1 secp224k1 secp224r1 secp256k1 prime256v1 secp384r1 secp521r1

-d key_file

Specifies the Windows key container to delete.

EXIT STATUS

The following exit values are returned:

SEE ALSO

uftp(1), uftpd(1), uftpproxyd(1).

NOTES

The latest version of UFTP can be found at http://uftp-multicast.sourceforge.net. UFTP is covered by the GNU General Public License. Commercial licenses and support are available from Dennis Bush (bush [AT] tcnj.edu).