jose4j – notice
Copyright 2012-2015 Brian Campbell
EcdsaUsingShaAlgorithm contains code for converting the concatenated
R & S values of the signature to and from DER, which was originally
derived from the Apache Santuario XML Security library's SignatureECDSA
The Base64 implementation in this software was derived from the
Apache Commons Codec project. http://commons.apache.org/proper/commons-codec/
JSON processing in this software was derived from the JSON.simple toolkit.