Package convex.core.crypto

Class ASignature

java.lang.Object

convex.core.data.AObject

convex.core.data.ACell

convex.core.crypto.ASignature

All Implemented Interfaces:

IValidated, IWriteable

Direct Known Subclasses:

Ed25519Signature

public abstract class ASignature
extends ACell

Class representing a cryptographic signature

Field Summary

Fields inherited from class convex.core.data.ACell

cachedRef, EMPTY_ARRAY

Fields inherited from class convex.core.data.AObject

encoding

Constructor Summary

Constructors

Constructor	Description
ASignature()

Method Summary

Modifier and Type	Method	Description
static ASignature	fromBlob(Blob sigData)	Construct a Signature from a Blob Uses Ed25519
static ASignature	fromHex(String hex)	Construct a Signature from a hex string Uses Ed25519
protected abstract ABlob	getSignatureBlob()	Gets a Blob containing the raw bytes of this digital signature
byte	getTag()	Gets the tag byte for this cell.
boolean	isEmbedded()	Determines if this Cell Represents an embedded object.
static ASignature	read(ByteBuffer bb)	Reads a Signature from the given ByteBuffer.
abstract String	toHexString()	Gets the content of this Signature as a hex string
abstract boolean	verify(ABlob message, AccountKey publicKey)	Checks if the signature is valid for a given message hash

Methods inherited from class convex.core.data.ACell

announce, announce, attachMemorySize, attachRef, cachedEncoding, cachedHash, calcMemorySize, createAnnounced, createEncoding, createPersisted, createPersisted, createRef, encode, encodeRaw, equals, equals, getChildRefs, getEncoding, getEncodingLength, getHash, getMemorySize, getRef, getRef, getRefCount, getType, hashCode, isCanonical, isCVMValue, toCanonical, toString, updateRefs, validate, validateCell, write

Methods inherited from class convex.core.data.AObject

attachEncoding, print, print

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface convex.core.data.IWriteable

estimatedEncodingSize

Constructor Details

ASignature

public ASignature()

Method Details

verify

public abstract boolean verify(ABlob message,
 AccountKey publicKey)

Checks if the signature is valid for a given message hash

Parameters:

message - Message to verify

publicKey - Public key of signer

Returns:

True if signature is valid, false otherwise

read

public static ASignature read(ByteBuffer bb)
                       throws BadFormatException

Reads a Signature from the given ByteBuffer. Assumes tag byte already read. Uses Ed25519

Parameters:

bb - ByteBuffer to read from

Returns:

Signature instance

Throws:

BadFormatException - If encoding is invalid

toHexString

public abstract String toHexString()

Gets the content of this Signature as a hex string

Returns:

Hex String representation of Signature

fromHex

public static ASignature fromHex(String hex)

Construct a Signature from a hex string Uses Ed25519

Parameters:

hex - Hex String to read from

Returns:

Signature instance

fromBlob

public static ASignature fromBlob(Blob sigData)

Construct a Signature from a Blob Uses Ed25519

Parameters:

sigData - Blob of data representing raw signature

Returns:

Signature instance

isEmbedded

public boolean isEmbedded()

Description copied from class: ACell

Determines if this Cell Represents an embedded object. Embedded objects are encoded directly into the encoding of the containing Cell (avoiding the need for a hashed reference). Subclasses should override this if they have a cheap O(1) way to determine if they are embedded or otherwise.

Overrides:

isEmbedded in class ACell

Returns:

true if Cell is embedded, false otherwise

getTag

public byte getTag()

Description copied from class: ACell

Gets the tag byte for this cell. The tag byte is always written as the first byte of the Cell's Encoding

Specified by:

getTag in class ACell

Returns:

Tag byte for this Cell

getSignatureBlob

protected abstract ABlob getSignatureBlob()

Gets a Blob containing the raw bytes of this digital signature

Returns:

Blob containing signature bytes