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Vendor paper-scorer
Package decrypter-php
Short Description PHP package to decrypt PaperScorer callback payloads.
License MIT

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Informations about the package decrypter-php

paper-scorer/decrypter-php

PaperScorer Decrypter

This PHP package encrypts and decrypts the payloads exchanged with the PaperScorer engine.

Package version: 1.2.0

Requirements

PHP 8.0.0 and later
openssl PHP extension

Installation & Usage

Composer

This package can be easily installed using the following composer command:

composer require paper-scorer/decrypter-php

Usage

Include and run the following code in your project:

Encryption scheme

Cipher: AES-128-CBC (via OpenSSL, with OPENSSL_RAW_DATA)
Key derivation: SHA-256(decryptKey + salt), truncated to 16 bytes (AES-128)
Payload format: fixed-width base64 fields, concatenated with no separators:

Field Raw bytes Base64 chars Position

IV 16 24 0–23

Salt 21 28 24–51

Ciphertext variable variable 52–end

The offsets depend on these exact byte lengths (a 16-byte IV always encodes to 24 base64 chars; a 21-byte salt to 28). A fresh random IV and salt are generated on every call to encrypt(), so the same plaintext yields a different payload each time.

Field	Raw bytes	Base64 chars	Position
IV	16	24	0–23
Salt	21	28	24–51
Ciphertext	variable	variable	52–end

Security note: Key derivation is a single SHA-256 pass with no iteration count (not PBKDF2/scrypt/argon2). This is a deliberate constraint to stay compatible with the existing PaperScorer payload format — it is not suitable as a general-purpose password-based encryption scheme.

Testing

Contributing

We are always looking for updates to the package that will help the community. If you have an idea for an update, please create a pull request with your changes.

Publishing

Update the CHANGELOG file
git tag -a vX.X.X
git push --tags origin HEAD:main
Log into Packagist and click "Update"

All versions of decrypter-php with dependencies

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Package Version

Version v1.1.0 Release 28. Jan 2026
create-project require 0 people chose require and
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