Purse is a fork of drduh/pwd.sh.

Both programs are Bash shell scripts which use GnuPG to manage passwords and other secrets in encrypted text files. Purse is based on asymmetric (public-key) authentication, while pwd.sh is based on symmetric (password-based) authentication.

While both scripts use a trusted crypto implementation (GnuPG) and safely handle passwords (never saving plaintext to disk, only using shell built-ins), Purse eliminates the need to remember a main passphrase - just plug in a YubiKey, enter the PIN, then touch it to decrypt a password to clipboard.

Install

This script requires a GnuPG identity - see drduh/YubiKey-Guide to set one up.

For the latest version, clone the repository or download the script directly:

git clone https://github.com/drduh/Purse

wget https://github.com/drduh/Purse/blob/master/purse.sh

Versioned Releases are also available.

Use

Run the script interactively using ./purse.sh or symlink to a directory in PATH:

• w to write a password
• r to read a password
• l to list passwords
• b to create an archive for backup
• h to print the help text

Options can also be passed on the command line.

Create a 20-character password for userName:

./purse.sh w userName 20

Read password for userName:

./purse.sh r userName

Passwords are stored with an epoch timestamp for revision control. The most recent version is copied to clipboard on read. To list all passwords or read a specific version of a password:

./purse.sh l

./purse.sh r userName@1574723600

Create an archive for backup:

./purse.sh b

Restore an archive from backup:

tar xvf purse*tar

Configure

Several customizable options and features are also available, and can be configured with environment variables, for example in the shell rc file:

Variable	Description	Default	Values
PURSE_TIME	seconds to clear password from clipboard/screen	10	any valid integer
PURSE_LEN	default generated password length	14	any valid integer
PURSE_COPY	copy password to clipboard before write	unset (disabled)	1 or true to enable
PURSE_DAILY	create daily backup archive on write	unset (disabled)	1 or true to enable
PURSE_ENCIX	encrypt index for additional privacy; 2 YubiKey touches will be required for separate decryption operations	unset (disabled)	1 or true to enable
PURSE_COMMENT	unencrypted comment to include in index and safe files	unset	any valid string
PURSE_CHARS	character set for passwords	[:alnum:]!?@#$%^&*();:+=	any valid characters
PURSE_DEST	password output destination, will set to screen without clipboard	clipboard	clipboard or screen
PURSE_ECHO	character used to echo password input	*	any valid character
PURSE_SAFE	safe directory name	safe	any valid string
PURSE_INDEX	index file name	purse.index	any valid string
PURSE_BACKUP	backup archive file name	purse.$hostname.$today.tar	any valid string

Note For additional privacy, the recipient key ID is not included in metadata (GnuPG throw-keyids option).

See config/gpg.conf for additional GnuPG options.