There is currently no Javascript implementation of ECIES compatible with apple's SecKeyAlgorithm standards. This library is an attempt to solve this problem ! Please refer to the original package for docs eccrypto. Everything is the same except that in ECIES, this library uses :
- The secp256r1 curve (or: prime256v1) for its operations
- A simple ANSII X9.63 SHA-256 KDF implemenation
- A variable 16 Bytes IV derived from the second half of the KDF
- AES-GCM with 128 bits key derived from the first half of the KDF
- HMAC is removed as it is not needed with AES-GCM
These changes make the encrypted bytes compatible with Apple's SecKeyAlgorithm.eciesEncryptionCofactorVariableIVX963SHA256AESGCM
Credits to David Schuetz for figuring out some of the inner workings of Apple's implementation.
eccrypto - JavaScript Elliptic curve cryptography library
Written in 2014-2015 by Kagami Hiiragi kagami@genshiken.org
To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide. This software is distributed without any warranty.
You should have received a copy of the CC0 Public Domain Dedication along with this software. If not, see http://creativecommons.org/publicdomain/zero/1.0/.