Package com.exonum.binding.common.message

Class SignedMessage

java.lang.Object
com.exonum.binding.common.message.SignedMessage
public final class SignedMessage
extends java.lang.Object
A wrapper around Messages.SignedMessage protobuf message containing Messages.CoreMessage, which converts protobuf types into internal types.

It currently does not support verification of the signature against the author's public key — such functionality may be added later if needed.

  • Method Summary

    Modifier and Type Method Description
    static SignedMessage fromProto​(Messages.SignedMessage message)
    Creates a wrapper around signed message.
    PublicKey getAuthorPk()
    Returns the key of the message author.
    Messages.CoreMessage getPayload()
    Returns the message payload.
    byte[] getSignature()
    Returns the signature of the payload, created with the private key, corresponding to the author's key.
    HashCode hash()
    Returns the hash of the signed message, which is the hash of the protobuf-serialized representation.
    static SignedMessage parseFrom​(byte[] messageBytes)
    Parses the signed message bytes.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • parseFrom

      public static SignedMessage parseFrom​(byte[] messageBytes) throws com.google.protobuf.InvalidProtocolBufferException
      Parses the signed message bytes. The parsing does not involve the signature verification — do it separately if needed.
      Parameters:
      messageBytes - the serialized message to parse
      Returns:
      a signed message with exonum message as its payload
      Throws:
      com.google.protobuf.InvalidProtocolBufferException - if the given bytes are not a serialized Messages.SignedMessage; or if the payload of the message is not Messages.CoreMessage

    • fromProto

      public static SignedMessage fromProto​(Messages.SignedMessage message) throws com.google.protobuf.InvalidProtocolBufferException
      Creates a wrapper around signed message.
      Parameters:
      message - a signed message
      Throws:
      com.google.protobuf.InvalidProtocolBufferException - if a signed message does not contain a valid payload that is a serialized Messages.CoreMessage

    • getPayload

      public Messages.CoreMessage getPayload()
      Returns the message payload.

    • getAuthorPk

      public PublicKey getAuthorPk()
      Returns the key of the message author.

      The correctness of the signature is not verified against this key and must be done separately if needed.

    • getSignature

      public byte[] getSignature()
      Returns the signature of the payload, created with the private key, corresponding to the author's key.

      The correctness of the signature is not verified against this key and must be done separately if needed.

    • hash

      public HashCode hash()
      Returns the hash of the signed message, which is the hash of the protobuf-serialized representation.