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Quill is a library for publishing data to a Chronicle instance. Requires PHP 7.1 or newer. PHP 7.2+ is recommended.

A monolog handler is also available.

Installing

composer require paragonie/quill

Usage

<?php

use ParagonIE\ConstantTime\Base64UrlSafe;
use ParagonIE\Quill\Quill;
use ParagonIE\Sapient\CryptographyKeys\{
 SigningSecretKey,
 SigningPublicKey
};

$quill = (new Quill())
 ->setChronicleURL('https://chronicle-public-test.paragonie.com/chronicle')
 ->setServerPublicKey(
 new SigningPublicKey(
 Base64UrlSafe::decode('3BK4hOYTWJbLV5QdqS-DFKEYOMKd-G5M9BvfbqG1ICI=')
 )
 )
 ->setClientID('**Your Client ID provided by the Chronicle here**')
 ->setClientSecretKey(
 new SigningSecretKey('/* Loaded from the filesystem or something. */')
 );

$quill->write("Important security notice goes here.");

Writing Data (Unencrypted)

There are two main API methods that do the same thing but differ in their return values:

• write(string $input): ResponseInterface
  • Returns the PSR-7 Response object, or throws an exception
• blindWrite(string $input): bool
  • Returns TRUE or FALSE

Writing Data (Symmetric Encryption)

If you want to encrypt your messages using a shared encryption key:

• writeEncrypted(string $input, SharedEncryptionKey $key): ResponseInterface
  • Returns the PSR-7 Response object, or throws an exception
• blindWriteEncrypted(string $input, SharedEncryptionKey $key): bool
  • Returns TRUE or FALSE

Writing Data (Asymmetric Encryption)

If you want to encrypt your messages using a public-key cryptography:

• writeSealed(string $input, SealingPublicKey $key): ResponseInterface
  • Returns the PSR-7 Response object, or throws an exception
• blindWriteSealed(string $input, SealingPublicKey $key): bool
  • Returns TRUE or FALSE