Package convex.core.crypto

Class ASignature

java.lang.Object

convex.core.data.AObject

convex.core.data.ACell

convex.core.data.ACountable<T>

convex.core.data.ABlobLike<CVMLong>

convex.core.data.ABlob

convex.core.data.AArrayBlob

convex.core.crypto.ASignature

All Implemented Interfaces:

IValidated, IWriteable, Comparable<ABlob>

Direct Known Subclasses:

Ed25519Signature

public abstract class ASignature
extends AArrayBlob

Class representing a cryptographic signature

Field Summary

Fields inherited from class convex.core.data.AArrayBlob

length, offset, store

Fields inherited from class convex.core.data.ABlob

contentHash

Fields inherited from class convex.core.data.ACell

cachedRef, EMPTY_ARRAY

Fields inherited from class convex.core.data.AObject

encoding

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ASignature(byte[] signature, int pos)

Method Summary

Modifier and Type	Method	Description
boolean	equals(ABlob b)	Determines if this Blob is equal to another Blob.
static ASignature	fromBlob(ABlob sigData)	Construct a Signature from a Blob Uses Ed25519
static ASignature	fromHex(String hex)	Construct a Signature from a hex string Uses Ed25519
abstract byte[]	getBytes()	Gets the raw bytes representing this signature, as a zero based array
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 boolean	verify(AArrayBlob message, AccountKey publicKey)	Checks if the signature is valid for a given message hash

Methods inherited from class convex.core.data.AArrayBlob

append, appendHex, appendSmall, byteAt, byteAtUnchecked, commonHexPrefixLength, compareTo, compareTo, count, encodeRaw, equalsBytes, equalsBytes, getByteBuffer, getBytes, getHexDigit, getInternalArray, getInternalOffset, getRefCount, hexMatches, hexMatchLength, longAt, longValue, rangeMatches, rangeMatches, shortAt, slice, toExactLong, toFlatBlob, updateDigest, validate, validateCell

Methods inherited from class convex.core.data.ABlob

computeHash, empty, equals, get, getChunk, getContentHash, getElementRef, getType, hashCode, hexEquals, hexEquals, hexLength, isCVMValue, isRegularBlob, print, slice, toByteBuffer, toCanonical, toHexString, toHexString

Methods inherited from class convex.core.data.ACountable

isEmpty, size

Methods inherited from class convex.core.data.ACell

announce, announce, attachMemorySize, attachRef, cachedEncoding, cachedHash, calcMemorySize, createAnnounced, createEncoding, createPersisted, createPersisted, createRef, encode, equals, getCanonical, getChildRefs, getEncoding, getEncodingLength, getHash, getMemorySize, getRef, getRef, isCanonical, isCompletelyEncoded, mark, mark, toCVMString, toString, updateRefs

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

protected ASignature(byte[] signature,
 int pos)

Method Details

verify

public abstract boolean verify(AArrayBlob 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

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(ABlob 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 equal to the first byte of the Cell's canonical Encoding, and is sufficient to distinguish how to read the rest of the encoding.

Overrides:

getTag in class AArrayBlob

Returns:

Tag byte for this Cell

getBytes

public abstract byte[] getBytes()

Gets the raw bytes representing this signature, as a zero based array

Overrides:

getBytes in class ABlobLike<CVMLong>

Returns:

byte array from this signature

equals

public boolean equals(ABlob b)

Description copied from class: ABlob

Determines if this Blob is equal to another Blob. Blobs are defined to be equal if they have the same on-chain representation, i.e. if and only if all of the following are true: - Blob is of the same general type - Blobs are of the same length - All byte values are equal

Overrides:

equals in class AArrayBlob

Parameters:

b - Blob to compare with

Returns:

true if Blobs are equal, false otherwise