php-authenticated-encryption-helper

A helper that uses OpenSSL for Authenticated Encryption in PHP for consistant implementation of Encrypt Then Mac using

• Key Generation: PBKDF2
• Encryption: OpenSSL, AES CBC Random IV
• Secure MAC: HMAC sha256
• PRG: OpenSSL, "random_pseudo_bytes"

Requires:

• OpenSSL
• PHP 5.3+ (tested using 5.4)

Notes:

• Plaintext Keys are 64 Bytes (char) / 512 bits
• When Encrypted they are 224 Bytes (char), ie. DB Storage = VARCHAR(225)