java.lang.Object

net.minecraft.util.Crypt

public class Crypt extends Object

Nested Class Summary

Nested Classes

Modifier and Type

Class

Description

(package private) static interface

Crypt.ByteArrayToKeyFunction<T extends Key>

static final record

Crypt.SaltSignaturePair

static class

Crypt.SaltSupplier
Field Summary

Fields

Modifier and Type

Field

Description

private static final String

ASYMMETRIC_ALGORITHM

private static final int

ASYMMETRIC_BITS

private static final String

BYTE_ENCODING

private static final String

HASH_ALGORITHM

static final Base64.Encoder

MIME_ENCODER

static final String

MIME_LINE_SEPARATOR

private static final String

PEM_RSA_PRIVATE_KEY_FOOTER

private static final String

PEM_RSA_PRIVATE_KEY_HEADER

static final com.mojang.serialization.Codec<PrivateKey>

PRIVATE_KEY_CODEC

static final com.mojang.serialization.Codec<PublicKey>

PUBLIC_KEY_CODEC

private static final String

RSA_PUBLIC_KEY_FOOTER

static final String

RSA_PUBLIC_KEY_HEADER

static final int

SIGNATURE_BYTES

static final String

SIGNING_ALGORITHM

private static final String

SYMMETRIC_ALGORITHM

private static final int

SYMMETRIC_BITS
Constructor Summary

Constructors

Constructor

Description

Crypt()
Method Summary

Modifier and Type

Method

Description

private static PrivateKey

byteToPrivateKey(byte[] keyBytes)

static PublicKey

byteToPublicKey(byte[] encodedKey)

Create a new PublicKey from encoded X.509 data

private static byte[]

cipherData(int opMode, Key key, byte[] data)

Encrypt or decrypt byte[] data using the specified key

static SecretKey

decryptByteToSecretKey(PrivateKey key, byte[] secretKeyEncrypted)

Decrypt shared secret AES key using RSA private key

static byte[]

decryptUsingKey(Key key, byte[] data)

Decrypt byte[] data with RSA private key

private static byte[]

digestData(byte[]... data)

static byte[]

digestData(String serverId, PublicKey publicKey, SecretKey secretKey)

Compute a serverId hash for use by sendSessionRequest()

static byte[]

encryptUsingKey(Key key, byte[] data)

Encrypt byte[] data with RSA public key

static KeyPair

generateKeyPair()

static SecretKey

generateSecretKey()

static Cipher

getCipher(int opMode, Key key)

Creates a Cipher instance using the AES/CFB8/NoPadding algorithm.

static String

pemRsaPrivateKeyToString(PrivateKey key)

static String

rsaPublicKeyToString(PublicKey key)

private static <T extends Key> T

rsaStringToKey(String keyBase64, String header, String footer, Crypt.ByteArrayToKeyFunction<T> keyFunction)

private static Cipher

setupCipher(int opMode, String transformation, Key key)

Creates the Cipher Instance.

static PrivateKey

stringToPemRsaPrivateKey(String keyBase64)

static PublicKey

stringToRsaPublicKey(String keyBase64)

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- SYMMETRIC_ALGORITHM
  
  private static final String SYMMETRIC_ALGORITHM
  See Also:
  
  Constant Field Values
- SYMMETRIC_BITS
  
  private static final int SYMMETRIC_BITS
  See Also:
  
  Constant Field Values
- ASYMMETRIC_ALGORITHM
  
  private static final String ASYMMETRIC_ALGORITHM
  See Also:
  
  Constant Field Values
- ASYMMETRIC_BITS
  
  private static final int ASYMMETRIC_BITS
  See Also:
  
  Constant Field Values
- BYTE_ENCODING
  
  private static final String BYTE_ENCODING
  See Also:
  
  Constant Field Values
- HASH_ALGORITHM
  
  private static final String HASH_ALGORITHM
  See Also:
  
  Constant Field Values
- SIGNING_ALGORITHM
  
  public static final String SIGNING_ALGORITHM
  See Also:
  
  Constant Field Values
- SIGNATURE_BYTES
  
  public static final int SIGNATURE_BYTES
  See Also:
  
  Constant Field Values
- PEM_RSA_PRIVATE_KEY_HEADER
  
  private static final String PEM_RSA_PRIVATE_KEY_HEADER
  See Also:
  
  Constant Field Values
- PEM_RSA_PRIVATE_KEY_FOOTER
  
  private static final String PEM_RSA_PRIVATE_KEY_FOOTER
  See Also:
  
  Constant Field Values
- RSA_PUBLIC_KEY_HEADER
  
  public static final String RSA_PUBLIC_KEY_HEADER
  See Also:
  
  Constant Field Values
- RSA_PUBLIC_KEY_FOOTER
  
  private static final String RSA_PUBLIC_KEY_FOOTER
  See Also:
  
  Constant Field Values
- MIME_LINE_SEPARATOR
  
  public static final String MIME_LINE_SEPARATOR
  See Also:
  
  Constant Field Values
- MIME_ENCODER
  
  public static final Base64.Encoder MIME_ENCODER
- PUBLIC_KEY_CODEC
  
  public static final com.mojang.serialization.Codec<PublicKey> PUBLIC_KEY_CODEC
- PRIVATE_KEY_CODEC
  
  public static final com.mojang.serialization.Codec<PrivateKey> PRIVATE_KEY_CODEC
Constructor Details
- Crypt
  
  public Crypt()
Method Details
- generateSecretKey
  
  public static SecretKey generateSecretKey() throws CryptException
  
  Throws:
  
  CryptException
- generateKeyPair
  
  public static KeyPair generateKeyPair() throws CryptException
  
  Throws:
  
  CryptException
- digestData
  
  public static byte[] digestData(String serverId, PublicKey publicKey, SecretKey secretKey) throws CryptException
  
  Compute a serverId hash for use by sendSessionRequest()
  
  Throws:
  
  CryptException
- digestData
  
  private static byte[] digestData(byte[]... data) throws Exception
  
  Throws:
  
  Exception
- rsaStringToKey
  
  private static <T extends Key> T rsaStringToKey(String keyBase64, String header, String footer, Crypt.ByteArrayToKeyFunction<T> keyFunction) throws CryptException
  
  Throws:
  
  CryptException
- stringToPemRsaPrivateKey
  
  public static PrivateKey stringToPemRsaPrivateKey(String keyBase64) throws CryptException
  
  Throws:
  
  CryptException
- stringToRsaPublicKey
  
  public static PublicKey stringToRsaPublicKey(String keyBase64) throws CryptException
  
  Throws:
  
  CryptException
- rsaPublicKeyToString
  
  public static String rsaPublicKeyToString(PublicKey key)
- pemRsaPrivateKeyToString
  
  public static String pemRsaPrivateKeyToString(PrivateKey key)
- byteToPrivateKey
  
  private static PrivateKey byteToPrivateKey(byte[] keyBytes) throws CryptException
  
  Throws:
  
  CryptException
- byteToPublicKey
  
  public static PublicKey byteToPublicKey(byte[] encodedKey) throws CryptException
  
  Create a new PublicKey from encoded X.509 data
  
  Throws:
  
  CryptException
- decryptByteToSecretKey
  
  public static SecretKey decryptByteToSecretKey(PrivateKey key, byte[] secretKeyEncrypted) throws CryptException
  
  Decrypt shared secret AES key using RSA private key
  
  Throws:
  
  CryptException
- encryptUsingKey
  
  public static byte[] encryptUsingKey(Key key, byte[] data) throws CryptException
  
  Encrypt byte[] data with RSA public key
  
  Throws:
  
  CryptException
- decryptUsingKey
  
  public static byte[] decryptUsingKey(Key key, byte[] data) throws CryptException
  
  Decrypt byte[] data with RSA private key
  
  Throws:
  
  CryptException
- cipherData
  
  private static byte[] cipherData(int opMode, Key key, byte[] data) throws CryptException
  
  Encrypt or decrypt byte[] data using the specified key
  
  Throws:
  
  CryptException
- setupCipher
  
  private static Cipher setupCipher(int opMode, String transformation, Key key) throws Exception
  
  Creates the Cipher Instance.
  
  Throws:
  
  Exception
- getCipher
  
  public static Cipher getCipher(int opMode, Key key) throws CryptException
  
  Creates a Cipher instance using the AES/CFB8/NoPadding algorithm. Used for protocol encryption.
  
  Throws:
  
  CryptException

Class Crypt

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Details

SYMMETRIC_ALGORITHM

SYMMETRIC_BITS

ASYMMETRIC_ALGORITHM

ASYMMETRIC_BITS

BYTE_ENCODING

HASH_ALGORITHM

SIGNING_ALGORITHM

SIGNATURE_BYTES

PEM_RSA_PRIVATE_KEY_HEADER

PEM_RSA_PRIVATE_KEY_FOOTER

RSA_PUBLIC_KEY_HEADER

RSA_PUBLIC_KEY_FOOTER

MIME_LINE_SEPARATOR

MIME_ENCODER

PUBLIC_KEY_CODEC

PRIVATE_KEY_CODEC

Constructor Details

Crypt

Method Details

generateSecretKey

generateKeyPair

digestData

digestData

rsaStringToKey

stringToPemRsaPrivateKey

stringToRsaPublicKey

rsaPublicKeyToString

pemRsaPrivateKeyToString

byteToPrivateKey

byteToPublicKey

decryptByteToSecretKey

encryptUsingKey

decryptUsingKey

cipherData

setupCipher

getCipher