com.google.crypto.tink.subtle

Interface StreamSegmentDecrypter

public interface StreamSegmentDecrypter

StreamSegmentDecrypter is a helper class that decrypts individual segments of a stream.

Instances of this interfaces are passed to StreamingAeadDecryptingChannel. Each instance must be initialized with the header of the ciphertext.

Since:

1.1.0

Method Summary

Modifier and Type	Method and Description
void	decryptSegment(ByteBuffer ciphertext, int segmentNr, boolean isLastSegment, ByteBuffer plaintext) Decrypts a ciphetext segment.
void	init(ByteBuffer header, byte[] aad)

Method Detail

init

void init(ByteBuffer header,
          byte[] aad)
   throws GeneralSecurityException

Throws:

GeneralSecurityException

decryptSegment

void decryptSegment(ByteBuffer ciphertext,
                    int segmentNr,
                    boolean isLastSegment,
                    ByteBuffer plaintext)
             throws GeneralSecurityException

Decrypts a ciphetext segment.

Parameters:

segmentNr - the number of the segment

isLastSegment - true if this segment is the last segment of the ciphertext stream. The last segment is encrypted (or authenticated) differently to detect truncated ciphertext.

plaintext - the decrypted plaintext.

Throws:

GeneralSecurityException - if ciphertext was not a valid ciphertext for the given segment.