org.cryptimeleon.craco.kem

Class StreamingHybridEncryptionScheme

java.lang.Object

org.cryptimeleon.craco.kem.StreamingHybridEncryptionScheme

All Implemented Interfaces:

EncryptionScheme, StreamingEncryptionScheme, org.cryptimeleon.math.serialization.annotations.RepresentationRestorer, org.cryptimeleon.math.serialization.Representable, org.cryptimeleon.math.serialization.StandaloneRepresentable

public class StreamingHybridEncryptionScheme
extends java.lang.Object
implements StreamingEncryptionScheme

Class that supports streaming encryption using a KEM to encapsulate a symmetric key.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StreamingHybridEncryptionScheme.HybridCipherText

Constructor Summary

Constructors

Constructor and Description
StreamingHybridEncryptionScheme(org.cryptimeleon.math.serialization.Representation repr)
StreamingHybridEncryptionScheme(StreamingEncryptionScheme symmetricScheme, KeyEncapsulationMechanism<SymmetricKey> kem2)

Method Summary

Modifier and Type	Method and Description
java.io.OutputStream	createDecryptor(java.io.OutputStream out, DecryptionKey privateKey) Returns an OutputStream that decrypts any bytes written to it and writes the resulting plaintext to out.
java.io.OutputStream	createEncryptor(java.io.OutputStream out, EncryptionKey publicKey) Returns an OutputStream that encrypts any bytes written to it and writes the resulting ciphertext to out.
PlainText	decrypt(CipherText cipherText, DecryptionKey privateKey) Decrypts the given cipher text using the given decryption key.
java.io.InputStream	decrypt(java.io.InputStream in, DecryptionKey privateKey) Returns an InputStream containing the plaintext obtained by decrypting the content of in.
java.io.InputStream	encrypt(java.io.InputStream in, EncryptionKey publicKey) Returns an InputStream containing the ciphertext obtained by encrypting the content of in.
CipherText	encrypt(PlainText plainText, EncryptionKey publicKey) Encrypts the given plain text using the given encryption key.
boolean	equals(java.lang.Object obj)
KeyEncapsulationMechanism<SymmetricKey>	getKeyEncapsulationMechanism()
org.cryptimeleon.math.serialization.Representation	getRepresentation()
int	hashCode()
CipherText	restoreCipherText(org.cryptimeleon.math.serialization.Representation repr) Restores the ciphertext corresponding to the given representation.
DecryptionKey	restoreDecryptionKey(org.cryptimeleon.math.serialization.Representation repr) Restores the decryption key corresponding to the given representation.
EncryptionKey	restoreEncryptionKey(org.cryptimeleon.math.serialization.Representation repr) Restores the encryption key corresponding to the given representation.
PlainText	restorePlainText(org.cryptimeleon.math.serialization.Representation repr) Restores the plaintext corresponding to the given representation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.cryptimeleon.craco.enc.StreamingEncryptionScheme

decrypt, encrypt

Methods inherited from interface org.cryptimeleon.craco.enc.EncryptionScheme

decrypt, encrypt, restoreFromRepresentation

Constructor Detail

StreamingHybridEncryptionScheme

public StreamingHybridEncryptionScheme(StreamingEncryptionScheme symmetricScheme,
                                       KeyEncapsulationMechanism<SymmetricKey> kem2)

StreamingHybridEncryptionScheme

public StreamingHybridEncryptionScheme(org.cryptimeleon.math.serialization.Representation repr)

Method Detail

encrypt

public CipherText encrypt(PlainText plainText,
                          EncryptionKey publicKey)

Description copied from interface: EncryptionScheme

Encrypts the given plain text using the given encryption key.

Specified by:

encrypt in interface EncryptionScheme

Parameters:

plainText - the plaintext to encrypt

publicKey - the key to use for encryption

Returns:

the resulting ciphertext

decrypt

public PlainText decrypt(CipherText cipherText,
                         DecryptionKey privateKey)

Description copied from interface: EncryptionScheme

Decrypts the given cipher text using the given decryption key.

Specified by:

decrypt in interface EncryptionScheme

Parameters:

cipherText - the ciphertext to decrypt

privateKey - the key to use for decryption

Returns:

the resulting plaintext

restorePlainText

public PlainText restorePlainText(org.cryptimeleon.math.serialization.Representation repr)

Description copied from interface: EncryptionScheme

Restores the plaintext corresponding to the given representation.

Specified by:

restorePlainText in interface EncryptionScheme

Parameters:

repr - the representation to restore the plaintext from

Returns:

the plaintext corresponding to the given representation

restoreCipherText

public CipherText restoreCipherText(org.cryptimeleon.math.serialization.Representation repr)

Description copied from interface: EncryptionScheme

Restores the ciphertext corresponding to the given representation.

Specified by:

restoreCipherText in interface EncryptionScheme

Parameters:

repr - the representation to restore the ciphertext from

Returns:

the ciphertext corresponding to the given representation

restoreEncryptionKey

public EncryptionKey restoreEncryptionKey(org.cryptimeleon.math.serialization.Representation repr)

Description copied from interface: EncryptionScheme

Restores the encryption key corresponding to the given representation.

Specified by:

restoreEncryptionKey in interface EncryptionScheme

Parameters:

repr - the representation to restore the encryption key from

Returns:

the encryption corresponding to the given representation

restoreDecryptionKey

public DecryptionKey restoreDecryptionKey(org.cryptimeleon.math.serialization.Representation repr)

Description copied from interface: EncryptionScheme

Restores the decryption key corresponding to the given representation.

Specified by:

restoreDecryptionKey in interface EncryptionScheme

Parameters:

repr - the representation to restore the decryption key from

Returns:

the decryption key corresponding to the given representation

getRepresentation

public org.cryptimeleon.math.serialization.Representation getRepresentation()

Specified by:

getRepresentation in interface org.cryptimeleon.math.serialization.Representable

encrypt

public java.io.InputStream encrypt(java.io.InputStream in,
                                   EncryptionKey publicKey)
                            throws java.io.IOException

Description copied from interface: StreamingEncryptionScheme

Returns an InputStream containing the ciphertext obtained by encrypting the content of in.

Note that calling this may already cause some bytes to be read from in.

Specified by:

encrypt in interface StreamingEncryptionScheme

Parameters:

in - stream containing the bytes to encrypt

publicKey - the key to encrypt with

Returns:

a stream containing the encrypted bytes.

Throws:

java.io.IOException

createEncryptor

public java.io.OutputStream createEncryptor(java.io.OutputStream out,
                                            EncryptionKey publicKey)
                                     throws java.io.IOException

Description copied from interface: StreamingEncryptionScheme

Returns an OutputStream that encrypts any bytes written to it and writes the resulting ciphertext to out.

Note that calling this may already cause some bytes to be written to out.

Specified by:

createEncryptor in interface StreamingEncryptionScheme

Parameters:

out - the stream to write the ciphertext to.

publicKey - the key to encrypt with.

Returns:

a stream that encrypts any input and writes the ciphertext to out.

Throws:

java.io.IOException

decrypt

public java.io.InputStream decrypt(java.io.InputStream in,
                                   DecryptionKey privateKey)
                            throws java.io.IOException

Description copied from interface: StreamingEncryptionScheme

Returns an InputStream containing the plaintext obtained by decrypting the content of in.

Note that calling this may already cause some bytes to be read from in.

Specified by:

decrypt in interface StreamingEncryptionScheme

Parameters:

in - in stream containing the bytes to decrypt

privateKey - the key to decrypt with.

Returns:

a stream containing the decrypted bytes.

Throws:

java.io.IOException

createDecryptor

public java.io.OutputStream createDecryptor(java.io.OutputStream out,
                                            DecryptionKey privateKey)

Description copied from interface: StreamingEncryptionScheme

Returns an OutputStream that decrypts any bytes written to it and writes the resulting plaintext to out.

Note that calling this may already cause some bytes to be written to out.

Specified by:

createDecryptor in interface StreamingEncryptionScheme

Parameters:

out - the stream to write the plaintext to.

privateKey - the key to decrypt with.

Returns:

a stream that decrypts any input and writes the plaintext to out.

getKeyEncapsulationMechanism

public KeyEncapsulationMechanism<SymmetricKey> getKeyEncapsulationMechanism()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object