Extra tweaks to CLI

hie.yaml

@@ -20,3 +20,6 @@ cradle:
           component: "password-instances:test:doctests"
         - path: "./password-instances/test/tasty"
           component: "password-instances:test:password-instances-tasty"
+
+        - path: "./password-cli/app"
+          component: "password-cli:exe:password-cli"

password-cli/ChangeLog.md

@@ -1,3 +1,27 @@
+## 0.1.1.0
+
+-   Small refactor and quality of life additions.
+    Thanks to [@Vlix](https://github.com/Vlix)
+    [#72](https://github.com/cdepillabout/password/pull/72)
+
+-   Changes include:
+    - More complete explanation of the CLI in the README.
+    - Added more description of commands and options.
+    - Added option to read literal contents of a file.
+    - Hash output now adds a newline when using the CLI interactively. (on Unix)
+    - Added `--version` to only output the version of the CLI.
+
 ## 0.1.0.0
 
--   Initial version.
+-   First minimal working CLI to hash passwords and verify hashes.
+    Thanks to [@blackheaven](https://github.com/blackheaven)
+    [#70](https://github.com/cdepillabout/password/pull/70)
+
+-   Functionality includes:
+    - Hashing (`Argon2`, `bcrypt`, `PBKDF2`, `scrypt`) interactively,
+      piped to `stdin`, or from the first line in a provided file.
+    - Checking a hash (`Argon2`, `bcrypt`, `PBKDF2`, `scrypt`) that is
+      provided through a CLI option, or from a provided file. The password
+      can be entered interactively, piped to `stdin` or from the first
+      line in a provided file.
+    - Option to disable logging to stdout or stderr. `-q|--quiet`

password-cli/README.md

@@ -1,22 +1,99 @@
-# password-cli
+# `password-cli`
 
 [![Build Status](https://github.com/cdepillabout/password/workflows/password/badge.svg)](http://github.com/cdepillabout/password)
 [![Hackage](https://img.shields.io/hackage/v/password-cli.svg)](https://hackage.haskell.org/package/password-cli)
 [![Stackage LTS](http://stackage.org/package/password-cli/badge/lts)](http://stackage.org/lts/package/password-cli)
 [![Stackage Nightly](http://stackage.org/package/password-cli/badge/nightly)](http://stackage.org/nightly/package/password-cli)
 [![BSD3 license](https://img.shields.io/badge/license-BSD3-blue.svg)](./LICENSE)
 
-This package provides a simple CLI for [password](https://hackage.haskell.org/package/password) package.
+This package provides a simple CLI for the [`password`](https://hackage.haskell.org/package/password) package.
+As such it supports all the algorithms that the [`password`](https://hackage.haskell.org/package/password)
+package supports, which at the time of writing are `Argon2`, `brypt`, `PBKDF2` and `scrypt`.
 
-Pipeline usage:
+At the moment, the default settings are used for each algorithm, but this will probably become configurable in
+a later version of the CLI.
 
+## Example usage
+
+The following sections give examples of how the CLI can be used.
+
+### Hashing a password interactively
+
+Hashing a password interactively is as easy as
+```
+user@computer $ password-cli hash bcrypt
+Enter password:
+```
+where the input is then hidden and the hash is printed to the screen, resulting in
+```
+user@computer $ password-cli hash bcrypt
+Enter password:
+$2b$10$JuNbIWqVQD2EldT481zEEuaVKROrYhsHXLjM/Tx3e7ahJQxVw7N4y
+user@computer $
+```
+
+### Hashing a password with pipes
+
+When piping in the password from a file or other program:
+```
+user@computer $ cat password.txt | password-cli hash pbkdf2
+Enter password:
+sha512:25000:8ZJ1T55Y0sPRwltXNe/2fA==:aA0BT1WlTg+t2pSr8E6+l2zJW88rmUiDlKeohSOnzS0nLOumDSyK0FfsiNJBvWvWVkB2r6IMxRqelk4LZR33ow==user@computer $
 ```
-$ password-cli check argon2 --quiet --hash $(password-cli hash argon2 --quiet)
+You'll notice the output has no newline, so you can easily pipe the resulting
+hash into a file or other program. When piping the result to a file, you'll
+probably want to use `--quiet` or `-q` to make sure the `Enter password:` prompt
+isn't also saved to the file.
 ```
+user@computer $ cat password.txt | password-cli hash pbkdf2 --quiet > password.hash
+user@computer $ cat password.hash && echo
+sha512:25000:iFYCOgfOgMPp0NuPXhyucw==:XUMDNnqZo2LH08CIZr+1nbTke3N6pE95FcbZA+4A1Ng4dWHnnl4SMUTn3KXFtB0uZRrEhArLatLAH1Oo8brcVw==
+user@computer $
+```
+When piping in the password, the first line of the file (i.e. up to the first newline)
+is read and taken as the password. This is also the case if the password is provided
+from a file, though you can set the `--literal-contents` flag to use the entire literal
+file contents as the password.
+
+### Hashing a password from a file
+
+Instead of piping in the contents of a file, you can also just provide the path
+to the file.
+```
+user@computer $ password-cli hash scrypt --password-file password.txt
+14|8|1|mdSECCGuEMf7GQOp9EX5EYLMW9Jwe6Dma7fwbxuNwvs=|KSh5jxOEiQPMjfng2D05/G1baiF2LyluWgg3Cfzh5arJUF3K7irRIBXoKAT/xCO11oPmsgDD7TT6l6FQth9f4g==user@computer $
+```
+Here you don't have to pass in the `--quiet` option, since the password is already provided
+so the CLI doesn't print `Enter password:` to the screen.
 
-Interactive mode (default):
+### Verifying a password hash
+
+Just like when hashing a password, you can input the password manually, through pipes, or
+by providing a `--password-file`.
+```
+user@computer $ # Interactively check password
+user@computer $ password-cli check argon2 --hash "SOME-HASH"
+Enter password:
+Password matches provided hash
+user@computer $ echo $?
+0
+```
+If the provided hash doesn't match the password, `Password does not match provided hash`
+will be shown and the exit code will be `1` to indicate a failed match.
+```
+user@computer $ # Pipe in the password.
+user@computer $ cat password.txt | password-cli check argon2 --hash "SOME-HASH" --quiet
+user@computer $ echo $?
+0
+user@computer $ # Give the WRONG password file.
+user@computer $ password-cli check argon2 --hash "SOME-HASH" --password-file password.txt.wrong --quiet
+user@computer $ echo $?
+1
+```
 
+You can also provide the hash from file contents by providing the path to the `--hash-file`
+option. Just like the default of the `--password-file` option, this will only read up to the
+first newline.
 ```
-$ password-cli hash argon2
-$ password-cli check argon2 --hash "SOME-HASH"
+user@computer $ password-cli check argon2 --hash-file password.hash
 ```