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GPGDIR(1) General Commands Manual GPGDIR(1) NAME gpgdir - recursive directory encryption with GnuPG SYNOPSIS gpgdir -e|-d <directory> [options] DESCRIPTION gpgdir is a perl script that uses the CPAN GnuPG::Interface perl module to recursively encrypt and decrypt directories using gpg. gpgdir re- cursively descends through a directory in order to make sure it en- crypts or decrypts every file in a directory and all of its subdirecto- ries. By default the mtime and atime values of all files will be pre- served upon encryption and decryption (this can be disabled with the --no-preserve-times option). Note that in --encrypt mode, gpgdir will delete the original files that it successfully encrypts (unless the --no-delete option is given). However, upon startup gpgdir first asks for a the decryption password to be sure that a dummy file can success- fully be encrypted and decrypted. The initial test can be disabled with the --skip-test option so that a directory can easily be encrypted without having to also specify a password (this is consistent with gpg behavior). Also, note that gpgdir is careful not encrypt hidden files and directories. After all, you probably don't want your ~/.gnupg di- rectory or ~/.bashrc file to be encrypted. The key gpgdir uses to en- crypt/decrypt a directory is specified in ~/.gpgdirrc. Finally, gpgdir can use the wipe program with the --Wipe command line option to securely delete the original unencrypted files after they have been successfully encrypted. This elevates the security stance of gpgdir since it is more difficult to recover the unencrypted data asso- ciated with files from the filesystem after they are encrypted (un- link() does not erase data blocks even though a file is removed). OPTIONS -e, --encrypt <directory> Recursively encrypt all files in the directory specified on the command line. All original files will be deleted (a password check is performed first to make sure that the correct password to unlock the private GnuPG key is known to the user). -d, --decrypt <directory> Recursively decrypt all files in the directory specified on the command line. The encrypted .gpg version of each file will be deleted. --sign <directory> Recursively sign all files in the directory specified on the command line. For each file, a detached .asc signature will be created. --verify <directory> Recursively verify all .asc signatures for files in the direc- tory specified on the command line. -g, --gnupg-dir <directory> Specify which .gnupg directory will be used to find GnuPG keys. The default is ~/.gnupg if this option is not used. This option allows gpgdir to be run as one user but use the keys of another user (assuming permissions are setup correctly, etc.). -p, --pw-file <pw-file> Read decryption password from pw-file instead of typing it on the command line. -t, --test-mode Run an encryption and decryption test against a dummy file and exit. This test is always run by default in both --encrypt and --decrypt mode. -S, --Symmetric Instruct gpgdir to encrypt to decrypt files using a symmetric cipher supported by GnuPG (CAST5 is commonly used). This re- sults in a significant speed up for the encryption/decryption process. -T, --Trial-run Show what encrypt/decrypt actions would take place without actu- ally doing them. The filesystem is not changed in any way in this mode. -I, --Interactive Prompt the user before actually encrypting or decrypting each file. This is useful to have fine-grained control over gpgdir operations as it recurses through a directory structure. -F, --Force Tell gpgdir to ignore non-fatal error conditions, such as the inability to encrypt or decrypt individual files because of per- missions errors. --Exclude <pattern> Instruct gpgdir to skip all files that match pattern as a regex match against each filename. This is similar to the --exclude option in the standard GNU tar command. --Exclude-from <file> Instruct gpgdir to exclude all files matched by patterns listed in file. This is similar to the --exclude-from the GNU tar com- mand. --Include <pattern> Instruct gpgdir to only include files that match pattern as a regex match against each filename. --Include-from <file> Instruct gpgdir to only include files matched by patterns listed in file. -W, --Wipe Use the wipe program to securely delete files after they have been successfully encrypted. -O, --Obfuscate-filename Tell gpgdir to obfuscate the file names of files that it en- crypts (in -e mode). The names of each file are stored within the file .gpgdir_map_file for every sub-directory, and this file is itself encrypted. In decryption mode (-d), the -O argument reverses the process so that the original files are restored. --overwrite-encrypted Overwrite encrypted files even if a previous <file>.gpg file al- ready exists. --overwrite-decrypted Overwrite decrypted files even if the previous unencrypted file already exists. -K, --Key-id <id> Manually specify a GnuPG key ID from the command line. Because GnuPG supports matching keys with a string, id does not strictly have to be a key ID; it can be a string that uniquely matches a key in the GnuPG key ring. -D, --Default-key Use the key that GnuPG defines as the default, i.e. the key that is specified by the default-key variable in ~/.gnupg/options. If the default-key variable is not defined within ~/.gnupg/op- tions, then GnuPG tries to use the first suitable key on its key ring (the initial encrypt/decrypt test makes sure that the user knows the corresponding password for the key). -a, --agent Instruct gpgdir to acquire gpg key password from a running gpg- agent instance. -A, --Agent-info <connection info> Specify the value of the GPG_AGENT_INFO environment variable as returned by the gpg-agent --daemon command. If the gpgdir --agent command line argument is used instead of --Agent-info, then gpgdir assumes that the GPG_AGENT_INFO environment variable has already been set in the current shell. -s, --skip-test Skip encryption and decryption test. This will allow gpgdir to be used to encrypt a directory without specifying a password (which normally gets used in encryption mode to test to make sure decryption against a dummy file works properly). -q, --quiet Print as little as possible to the screen when encrypting or de- crypting a directory. --no-recurse Instruct gpgdir to not recurse through any subdirectories of the directory that is being encrypted or decrypted. --no-password Instruct gpgdir to not ask the user for a password. This is only useful when a gpg key literally has no associated password (this is not common). --no-delete Instruct gpgdir to not delete original files at encrypt time. --no-preservetimes Instruct gpgdir to not preserve original file mtime and atime values upon encryption or decryption. -l, --locale <locale> Provide a locale setting other than the default "C" locale. --no-locale Do not set the locale at all so that the default system locale will apply. -v, --verbose Run in verbose mode. -V, --Version Print version number and exit. -h, --help Print usage information and exit. FILES ~/.gpgdirrc Contains the key id of the user gpg key that will be used to en- crypt or decrypt the files within a directory. ENVIRONMENT HOME Set the default home directory. GNUPGBIN Set the gpg binary. Default: "gpg". GNUPGHOME Set the default working directory for gpg. Default: "~/.gnupg". EXAMPLES The following examples illustrate the command line arguments that could be supplied to gpgdir in a few situations: To encrypt a directory: $ gpgdir -e /some/dir To encrypt a directory, and use the wipe command to securely delete the original unencrypted files: $ gpgdir -W -e /some/dir To encrypt a directory with the default GnuPG key defined in ~/.gnupg/options: $ gpgdir -e /some/dir --Default-key To decrypt a directory with a key specified in ~/.gpgdirrc: $ gpgdir -d /some/dir To encrypt a directory but skip all filenames that contain the string "host": $ gpgdir -e /some/dir --Exclude host To encrypt a directory but only encrypt those files that contain the string "passwd": $ gpgdir -e /some/dir --Include passwd To acquire the GnuPG key password from a running gpg-agent daemon in order to decrypt a directory (this requires that gpg-agent has the password): $ gpgdir -A /tmp/gpg-H4DBhc/S.gpg-agent:7046:1 -d /some/dir To encrypt a directory but skip the encryption/decryption test (so you will not be prompted for a decryption password): $ gpgdir -e /some/dir -s To encrypt a directory and no subdirectories: $ gpgdir -e /some/dir --no-recurse To encrypt root's home directory, but use the GnuPG keys associated with the user "bob": # gpgdir -e /root -g /home/bob/.gnupg DEPENDENCIES gpgdir requires that gpg, the Gnu Privacy Guard (http://www.gnupg.org) is installed. gpgdir also requires the GnuPG::Interface perl module from CPAN, but it is bundled with gpgdir and is installed in /usr/lib/gpgdir at install-time so it does not pollute the system perl library tree. SEE ALSO gpg(1) AUTHOR Michael Rash <mbr@cipherdyne.org> CONTRIBUTORS Many people who are active in the open source community have con- tributed to gpgdir; see the CREDITS file in the gpgdir sources. BUGS Send bug reports to mbr@cipherdyne.org. Suggestions and/or comments are always welcome as well. DISTRIBUTION gpgdir is distributed under the GNU General Public License (GPL), and the latest version may be downloaded from http://www.cipherdyne.org Linux May, 2007 GPGDIR(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | ENVIRONMENT | EXAMPLES | DEPENDENCIES | SEE ALSO | AUTHOR | CONTRIBUTORS | BUGS | DISTRIBUTION
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