Certificate.NullCert | Javadocs [I2P+]

net.i2p.data.Certificate.NullCert

All Implemented Interfaces:: Serializable, DataStructure

Enclosing class:: Certificate

private static final class Certificate.NullCertextends Certificate

An immutable null certificate.

Field Summary
Fields
Modifier and Type
Field
Description
private static final byte[]
NULL_DATA
The bytes of the empty certificate.
private static final int
NULL_LENGTH
Bytes in the empty certificate.
Fields inherited from class Certificate
_payload, _type, CERTIFICATE_LENGTH_SIGNED_WITH_HASH, CERTIFICATE_TYPE_HIDDEN, CERTIFICATE_TYPE_KEY, CERTIFICATE_TYPE_MULTIPLE, CERTIFICATE_TYPE_NULL, CERTIFICATE_TYPE_SIGNED, NULL_CERT
Modifier and Type
Field
Description
protected byte[]
_payload
Certificate payload data.
protected int
_type
Certificate type identifier.
static final int
CERTIFICATE_LENGTH_SIGNED_WITH_HASH
Length of signed certificate with hash (signature + hash).
static final int
CERTIFICATE_TYPE_HIDDEN
We should not be used for anything (don't use us in the netDb, in tunnels, or tell others about us).
static final int
CERTIFICATE_TYPE_KEY
Key certificate type.
static final int
CERTIFICATE_TYPE_MULTIPLE
Contains multiple certs.
static final int
CERTIFICATE_TYPE_NULL
Specifies a null certificate type with no payload.
static final int
CERTIFICATE_TYPE_SIGNED
Signed with 40-byte Signature and (optional) 32-byte hash.
static final Certificate
NULL_CERT
Null certificate singleton.
Constructor Summary
Constructors
Constructor
Description
NullCert()
The certificate that carries nothing.
Method Summary
All Methods
Modifier and Type
Method
Description
int
hashCode()
Overridden for efficiency.
int
readBytes(byte[] source, int offset)
Prevent mutation of the immutable null certificate.
void
readBytes(InputStream in)
Prevent mutation of the immutable null certificate.
void
setCertificateType(int type)
Prevent mutation of the immutable null certificate.
void
setPayload(byte[] payload)
Prevent mutation of the immutable null certificate.
int
size()
Overridden for efficiency.
int
writeBytes(byte[] target, int offset)
Overridden for efficiency.
void
writeBytes(OutputStream out)
Overridden for efficiency.
Methods inherited from class Certificate
create, create, equals, getCertificateType, getPayload, toKeyCertificate, toString
Modifier and Type
Method
Description
static Certificate
create(byte[] data, int off)
If null, P256 key, or Ed25519 key cert, return immutable static instance, else create new.
static Certificate
create(InputStream in)
If null, P256 key, or Ed25519 key cert, return immutable static instance, else create new.
boolean
equals(Object object)

int
getCertificateType()
Certificate type.
byte[]
getPayload()
Payload carried by this certificate.
KeyCertificate
toKeyCertificate()
Up-convert this to a KeyCertificate.
String
toString()

Methods inherited from class DataStructureImpl
calculateHash, fromBase64, fromByteArray, read, toBase64, toByteArray
Modifier and Type
Method
Description
Hash
calculateHash()
Calculate the SHA256 value of this object (useful for a few scenarios).
void
fromBase64(String data)
Load the structure from the provided base64 string.
void
fromByteArray(byte[] data)
Loads structure from the data provided
protected int
read(InputStream in, byte[] target)
Repeated reads until buffer is full or IOException is thrown.
String
toBase64()
Render the structure into modified base 64 notation.
byte[]
toByteArray()
Convert the structure to a byte array.
Methods inherited from class Object
clone, getClass, notify, notifyAll, wait, wait, wait

Field Details
- NULL_LENGTH
  private static final int NULL_LENGTH
  Bytes in the empty certificate.
  See Also:
  Constant Field Values
- NULL_DATA
  private static final byte[] NULL_DATA
  The bytes of the empty certificate.
Constructor Details
- NullCert
  public NullCert()
  The certificate that carries nothing.
Method Details
- setCertificateType
  public void setCertificateType(int type)
  Prevent mutation of the immutable null certificate.
  Overrides:
  setCertificateType in class Certificate
  Parameters:
  type - the certificate type to set
- setPayload
  public void setPayload(byte[] payload)
  Prevent mutation of the immutable null certificate.
  Overrides:
  setPayload in class Certificate
  Parameters:
  payload - the payload to set
- readBytes
  public void readBytes(InputStream in) throws DataFormatException, IOException
  Prevent mutation of the immutable null certificate.
  Specified by:
  readBytes in interface DataStructure
  Overrides:
  readBytes in class Certificate
  Parameters:
  in - stream to read from
  Throws:
  DataFormatException - if the data is improperly formatted
  IOException - if there was a problem reading the stream
- writeBytes
  public void writeBytes(OutputStream out) throws IOException
  Overridden for efficiency.
  Specified by:
  writeBytes in interface DataStructure
  Overrides:
  writeBytes in class Certificate
  Parameters:
  out - stream to write to
  Throws:
  IOException - if there was a problem writing to the stream
- writeBytes
  public int writeBytes(byte[] target, int offset)
  Overridden for efficiency.
  Overrides:
  writeBytes in class Certificate
  Parameters:
  target - the output array
  offset - the starting offset in the target
  Returns:
  the written length (NOT the new offset)
- readBytes
  public int readBytes(byte[] source, int offset) throws DataFormatException
  Prevent mutation of the immutable null certificate.
  Overrides:
  readBytes in class Certificate
  Parameters:
  source - the array holding the certificate data
  offset - the starting offset in the source
  Returns:
  the bytes consumed
  Throws:
  DataFormatException - if the data is malformed
- size
  public int size()
  Overridden for efficiency.
  Overrides:
  size in class Certificate
  Returns:
  the size in bytes: 3 plus the payload length
- hashCode
  public int hashCode()
  Overridden for efficiency.
  Overrides:
  hashCode in class Certificate

Field Summary

Fields inherited from class Certificate

Constructor Summary

Method Summary

Methods inherited from class Certificate

Methods inherited from class DataStructureImpl

Methods inherited from class Object

Field Details

NULL_LENGTH

NULL_DATA

Constructor Details

NullCert

Method Details

setCertificateType

setPayload

readBytes

writeBytes

writeBytes

readBytes

size

hashCode