Signable (drasyl: General-Purpose Overlay Network Framework - Core Package 0.3.0 API)

All Known Implementing Classes:

SignedMessage
```
public interface Signable
```
Instances of classes that implement this interface are considered signable. A signable object can be converted into a signature and can store that signature itself.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default byte[]`	`getSignableBytes()`	Returns a byte representation of the object that can be used for signing the object.
`Signature`	`getSignature()`	Returns the signature this signable object was signed with.
`void`	`setSignature(Signature signature)`	Signs the object with the specified signature.
`default void`	`writeFieldsTo(OutputStream outstream)`	Write any content into the passed output-stream to have them included in the signing process.

- Method Detail
  - getSignableBytes
```
default byte[] getSignableBytes()
```
    Returns a byte representation of the object that can be used for signing the object. Attention: If you omit fields in this method those fields will not be signed. That means that they can be modified by a third party without detection.
    
    The default-implementation creates a ByteArrayOutputStream and calls writeFieldsTo(OutputStream) to have content written to it.
    
    Returns:
    
    byte-array or null
  - writeFieldsTo
```
default void writeFieldsTo(OutputStream outstream)
                    throws IOException
```
    Write any content into the passed output-stream to have them included in the signing process.
    
    Only use this with the default-implementation of getSignableBytes()
    
    Parameters:
    
    outstream - an outputstream to write to
    
    Throws:
    
    IOException
  - getSignature
```
Signature getSignature()
```
    Returns the signature this signable object was signed with.
  - setSignature
```
void setSignature(Signature signature)
```
    Signs the object with the specified signature. After this method was invoked subsequent calls to getSignature() should return a Signature object that is equal to the specified signature.