org.apache.parquet.format

Interface BlockCipher.Decryptor

Enclosing interface:

BlockCipher

public static interface BlockCipher.Decryptor

Method Summary

Modifier and Type	Method and Description
byte[]	decrypt(byte[] lengthAndCiphertext, byte[] AAD) Decrypts the ciphertext.
ByteBuffer	decrypt(ByteBuffer from, byte[] AAD) Convenience decryption method that reads the length and ciphertext from a ByteBuffer
byte[]	decrypt(InputStream from, byte[] AAD) Convenience decryption method that reads the length and ciphertext from the input stream.

Method Detail

decrypt

byte[] decrypt(byte[] lengthAndCiphertext,
               byte[] AAD)

Decrypts the ciphertext.

Parameters:

lengthAndCiphertext - - The first 4 bytes of the input are the ciphertext length (little endian int). The ciphertext starts at offset 4 and fills up the rest of the input byte array. The ciphertext includes the nonce and (in case of GCM cipher) the tag, as detailed in the Parquet Modular Encryption specification.

AAD - - Additional Authenticated Data for the decryption (ignored in case of CTR cipher)

Returns:

plaintext - starts at offset 0 of the output value, and fills up the entire byte array.

decrypt

ByteBuffer decrypt(ByteBuffer from,
                   byte[] AAD)

Convenience decryption method that reads the length and ciphertext from a ByteBuffer

Parameters:

from - ByteBuffer with length and ciphertext.

AAD - - Additional Authenticated Data for the decryption (ignored in case of CTR cipher)

Returns:

plaintext - starts at offset 0 of the output, and fills up the entire byte buffer.

decrypt

byte[] decrypt(InputStream from,
               byte[] AAD)
        throws IOException

Convenience decryption method that reads the length and ciphertext from the input stream.

Parameters:

from - Input stream with length and ciphertext.

AAD - - Additional Authenticated Data for the decryption (ignored in case of CTR cipher)

Returns:

plaintext - starts at offset 0 of the output, and fills up the entire byte array.

Throws:

IOException - - Stream I/O problems