grid-change-pass-phrase(1) [debian man page]

GRID-CHANGE-PASS-(1)						  Globus Commands					      GRID-CHANGE-PASS-(1)

NAME

       grid-change-pass-phrase - Change the passphrase of a private key

SYNOPSIS

       grid-change-pass-phrase [-help] [-usage] [-version] [-versions]

       grid-change-pass-phrase [-file PRIVATE-KEY]

DESCRIPTION

       The grid-change-pass-phrase program changes the passphrase protecting a private key or PKCS12 bundle containing a private key and
       certificate. By default, grid-change-pass-phrase uses the X509_USER_KEY environment variable to locate the private key. If that is not set,
       then it looks for $HOME/.globus/userkey.pem and $HOME/.globus/usercred.p12 in succession. The path to a key can be specified by using the
       -file command-line option.

       The full set of command-line options to grid-change-pass-phrase are:

       -help, -usage
	   Display the command-line options to grid-change-pass-phrase and exit.

       -version, -versions
	   Display the version number of the grid-change-pass-phrase command. The second form includes more details.

       -file PRIVATE-KEY
	   Change the passphrase of the private key named by PRIVATE-KEY instead of the default.

EXAMPLES

       Change the passphrase of the default private key:

	   % grid-change-pass-phrase

	   Enter pass phrase for /home/juser/.globus/userkey.pem:
	   writing RSA key
	   Enter PEM pass phrase:
	   Verifying - Enter PEM pass phrase:

ENVIRONMENT VARIABLES

       The following environment variables affect the execution of grid-change-pass-phrase:

       X509_USER_KEY
	   Path to the default private key file.

AUTHOR

       University of Chicago

Globus Toolkit 5.0.1						    03/22/2010						      GRID-CHANGE-PASS-(1)

AMCRYPT-OSSL-ASYM(8)					  System Administration Commands				      AMCRYPT-OSSL-ASYM(8)

NAME

       amcrypt-ossl-asym - crypt program for Amanda asymmetric data encryption using OpenSSL

SYNOPSIS

       amcrypt-ossl-asym [-d]

DESCRIPTION

       amcrypt-ossl-asym uses OpenSSL to encrypt and decrypt data. OpenSSL is available from www.openssl.org. OpenSSL offers a wide variety of
       cipher choices ( amcrypt-ossl-asym defaults to 256-bit AES) and can use hardware cryptographic accelerators on several platforms.

       amcrypt-ossl-asym will search for the OpenSSL program in the following directories:
       /bin:/usr/bin:/usr/local/bin:/usr/ssl/bin:/usr/local/ssl/bin.

GENERATING PUBLIC AND PRIVATE KEYS

       RSA keys can be generated with the standard OpenSSL commands, e.g.:
       $ cd /var/lib/amanda
       $ openssl genrsa -aes128 -out backup-privkey.pem 1024
       Generating RSA private key, 1024 bit long modulus
       [...]
       Enter pass phrase for backup-privkey.pem: ENTER YOUR PASS PHRASE
       Verifying - Enter pass phrase for backup-key.pem: ENTER YOUR PASS PHRASE

       $ openssl rsa -in backup-privkey.pem -pubout -out backup-pubkey.pem
       Enter pass phrase for backup-privkey.pem: ENTER YOUR PASS PHRASE
       Writing RSA key

       To generate a private key without a passphrase, omit the -aes128 option. See openssl_genrsa(1) for more key generation options.

       Note that it is always possible to generate the public key from the private key.

KEY AND PASSPHRASE MANAGEMENT

       amcrypt-ossl-asym uses the public key to encrypt data. The security of the data does not depend on the confidentiality of the public key.
       The private key is used to decrypt data, and must be protected. Encrypted backup data cannot be recovered without the private key. The
       private key may optionally be encrypted with a passphrase.

       While the public key must be online at all times to perorm backups, the private key and optional passphrase are only needed to restore
       data. It is recommended that the latter be stored offline all other times. For example, you could keep the private key on removable media,
       and copy it into place for a restore; or you could keep the private key online, encrypted with a passphrase that is present only for a
       restore.

       OpenSSL's key derivation routines use a salt to guard against dictionary attacks on the pass phrase; still it is important to pick a pass
       phrase that is hard to guess. The Diceware method (see www.diceware.com) can be used to create passphrases that are difficult to guess and
       easy to remember.

FILES

       /var/lib/amanda/backup-privkey.pem
	   File containing the RSA private key. It should not be readable by any user other than the Amanda user.

       /var/lib/amanda/backup-pubkey.pem
	   File containing the RSA public key.

       /var/lib/amanda/.am_passphrase
	   File containing the passphrase. It should not be readable by any user other than the Amanda user.

SEE ALSO

       amanda(8), amanda.conf(5), openssl(1), amcrypt-ossl(8)

       The Amanda Wiki: : http://wiki.zmanda.com/

AUTHOR

       Kevin Till <kevin.till@zmanda.com>
	   Zmanda, Inc. (http://www.zmanda.com)

NOTES

	1. www.openssl.org
	   http://www.openssl.org/

	2. www.diceware.com
	   http://www.diceware.com/

Amanda 3.3.1							    02/21/2012						      AMCRYPT-OSSL-ASYM(8)