mirror of https://github.com/octoleo/Purse.git
89 lines
3.4 KiB
Markdown
89 lines
3.4 KiB
Markdown
Purse is a fork of [drduh/pwd.sh](https://github.com/drduh/pwd.sh).
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Both programs are Bash shell scripts which use [GnuPG](https://www.gnupg.org/) 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.
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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.
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# Install
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This script requires a GnuPG identity - see [drduh/YubiKey-Guide](https://github.com/drduh/YubiKey-Guide) to set one up.
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For the latest version, clone the repository or download the script directly:
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```console
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git clone https://github.com/drduh/Purse
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wget https://github.com/drduh/Purse/blob/master/purse.sh
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```
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Versioned [Releases](https://github.com/drduh/Purse/releases) are also available.
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# Use
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Run the script interactively using `./purse.sh` or symlink to a directory in `PATH`:
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- `w` to write a password
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- `r` to read a password
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- `l` to list passwords
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- `b` to create an archive for backup
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- `h` to print the help text
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Options can also be passed on the command line.
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Create a 20-character password for `userName`:
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```console
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./purse.sh w userName 20
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```
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Read password for `userName`:
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```console
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./purse.sh r userName
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```
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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:
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```console
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./purse.sh l
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./purse.sh r userName@1574723600
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```
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Create an archive for backup:
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```console
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./purse.sh b
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```
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Restore an archive from backup:
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```console
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tar xvf purse*tar
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```
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# Configure
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Several customizable options and features are also available, and can be configured with environment variables, for example in the [shell rc](https://github.com/drduh/config/blob/master/zshrc) file:
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Variable | Description | Default | Values
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-|-|-|-
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`PURSE_TIME` | seconds to clear password from clipboard/screen | `10` | any valid integer
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`PURSE_LEN` | default generated password length | `14` | any valid integer
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`PURSE_COPY` | copy password to clipboard before write | unset (disabled) | `1` or `true` to enable
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`PURSE_DAILY` | create daily backup archive on write | unset (disabled) | `1` or `true` to enable
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`PURSE_ENCIX` | encrypt index for additional privacy; 2 YubiKey touches will be required for separate decryption operations | unset (disabled) | `1` or `true` to enable
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`PURSE_COMMENT` | **unencrypted** comment to include in index and safe files | unset | any valid string
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`PURSE_CHARS` | character set for passwords | `[:alnum:]!?@#$%^&*();:+=` | any valid characters
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`PURSE_DEST` | password output destination, will set to `screen` without clipboard | `clipboard` | `clipboard` or `screen`
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`PURSE_ECHO` | character used to echo password input | `*` | any valid character
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`PURSE_SAFE` | safe directory name | `safe` | any valid string
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`PURSE_INDEX` | index file name | `purse.index` | any valid string
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`PURSE_BACKUP` | backup archive file name | `purse.$hostname.$today.tar` | any valid string
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**Note** For additional privacy, the recipient key ID is **not** included in metadata (GnuPG `throw-keyids` option).
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See [config/gpg.conf](https://github.com/drduh/config/blob/master/gpg.conf) for additional GnuPG options.
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