Class AesGcmAeadCrypter

java.lang.Object

io.grpc.alts.internal.AesGcmAeadCrypter

All Implemented Interfaces:

AeadCrypter

final class AesGcmAeadCrypter
extends Object
implements AeadCrypter

AES128-GCM implementation of AeadCrypter that uses default JCE provider.

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	AES
private static final String	AES_GCM
private final Cipher	cipher
private static final Provider	CONSCRYPT
private final byte[]	key
private static final int	KEY_LENGTH
private static final Logger	logger
(package private) static final int	NONCE_LENGTH
private static final int	TAG_LENGTH

Constructor Summary

Constructors

Constructor	Description
AesGcmAeadCrypter(byte[] key)

Method Summary

Modifier and Type	Method	Description
void	decrypt(ByteBuffer plaintext, ByteBuffer ciphertext, byte[] nonce)	Decrypt ciphertext into plaintext buffer using the given nonce.
void	decrypt(ByteBuffer plaintext, ByteBuffer ciphertext, ByteBuffer aad, byte[] nonce)	Decrypt ciphertext into plaintext buffer using the given nonce.
private void	decryptAad(ByteBuffer plaintext, ByteBuffer ciphertext, ByteBuffer aad, byte[] nonce)
void	encrypt(ByteBuffer ciphertext, ByteBuffer plaintext, byte[] nonce)	Encrypt plaintext into ciphertext buffer using the given nonce.
void	encrypt(ByteBuffer ciphertext, ByteBuffer plaintext, ByteBuffer aad, byte[] nonce)	Encrypt plaintext into ciphertext buffer using the given nonce with authenticated data.
private int	encryptAad(ByteBuffer ciphertext, ByteBuffer plaintext, ByteBuffer aad, byte[] nonce)
(package private) static Provider	getConscrypt()
(package private) static int	getKeyLength()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

logger

private static final Logger logger

KEY_LENGTH

private static final int KEY_LENGTH

See Also:

• Constant Field Values

TAG_LENGTH

private static final int TAG_LENGTH

See Also:

• Constant Field Values

NONCE_LENGTH

static final int NONCE_LENGTH

See Also:

• Constant Field Values

AES

private static final String AES

See Also:

• Constant Field Values

AES_GCM

private static final String AES_GCM

See Also:

• Constant Field Values

CONSCRYPT

private static final Provider CONSCRYPT

key

private final byte[] key

cipher

private final Cipher cipher

Constructor Details

AesGcmAeadCrypter

AesGcmAeadCrypter(byte[] key)
           throws GeneralSecurityException

Throws:

GeneralSecurityException

Method Details

encryptAad

private int encryptAad(ByteBuffer ciphertext,
 ByteBuffer plaintext,
 @Nullable
 ByteBuffer aad,
 byte[] nonce)
                throws GeneralSecurityException

Throws:

GeneralSecurityException

decryptAad

private void decryptAad(ByteBuffer plaintext,
 ByteBuffer ciphertext,
 @Nullable
 ByteBuffer aad,
 byte[] nonce)
                 throws GeneralSecurityException

Throws:

GeneralSecurityException

encrypt

public void encrypt(ByteBuffer ciphertext,
 ByteBuffer plaintext,
 byte[] nonce)
             throws GeneralSecurityException

Description copied from interface: AeadCrypter

Encrypt plaintext into ciphertext buffer using the given nonce.

Specified by:

encrypt in interface AeadCrypter

Parameters:

ciphertext - the encrypted plaintext and the tag will be written into this buffer.

plaintext - the input that should be encrypted.

nonce - the unique nonce used for the encryption.

Throws:

GeneralSecurityException - if ciphertext buffer is short or the nonce does not have the expected size.

encrypt

public void encrypt(ByteBuffer ciphertext,
 ByteBuffer plaintext,
 ByteBuffer aad,
 byte[] nonce)
             throws GeneralSecurityException

Description copied from interface: AeadCrypter

Encrypt plaintext into ciphertext buffer using the given nonce with authenticated data.

Specified by:

encrypt in interface AeadCrypter

Parameters:

ciphertext - the encrypted plaintext and the tag will be written into this buffer.

plaintext - the input that should be encrypted.

aad - additional data that should be authenticated, but not encrypted.

nonce - the unique nonce used for the encryption.

Throws:

GeneralSecurityException - if ciphertext buffer is short or the nonce does not have the expected size.

decrypt

public void decrypt(ByteBuffer plaintext,
 ByteBuffer ciphertext,
 byte[] nonce)
             throws GeneralSecurityException

Description copied from interface: AeadCrypter

Decrypt ciphertext into plaintext buffer using the given nonce.

Specified by:

decrypt in interface AeadCrypter

Parameters:

plaintext - the decrypted plaintext will be written into this buffer.

ciphertext - the ciphertext and tag that should be decrypted.

nonce - the nonce that was used for the encryption.

Throws:

GeneralSecurityException - if the tag is invalid or any of the inputs do not have the expected size.

decrypt

public void decrypt(ByteBuffer plaintext,
 ByteBuffer ciphertext,
 ByteBuffer aad,
 byte[] nonce)
             throws GeneralSecurityException

Description copied from interface: AeadCrypter

Decrypt ciphertext into plaintext buffer using the given nonce.

Specified by:

decrypt in interface AeadCrypter

Parameters:

plaintext - the decrypted plaintext will be written into this buffer.

ciphertext - the ciphertext and tag that should be decrypted.

aad - additional data that is checked for authenticity.

nonce - the nonce that was used for the encryption.

Throws:

GeneralSecurityException - if the tag is invalid or any of the inputs do not have the expected size.

getKeyLength

static int getKeyLength()

getConscrypt

static Provider getConscrypt()