Field Detail

• DATA_SIZE

  private static final int DATA_SIZE

  See Also:

  Constant Field Values

• encryptionStrength

  private byte encryptionStrength

• KEY_STRENGTHS

  private static final AesKeyStrength[] KEY_STRENGTHS

• method

  private short method

• VENDOR_ID

  private static final int VENDOR_ID

  See Also:

  Constant Field Values

• vendorVersion

  private short vendorVersion

• VV_AE_1

  static final int VV_AE_1

  Entries of this type do include the standard ZIP CRC-32 value. For use with setVendorVersion(int)/getVendorVersion().

  See Also:

  Constant Field Values

• VV_AE_2

  static final int VV_AE_2

  Entries of this type do not include the standard ZIP CRC-32 value. For use with setVendorVersion(int)/getVendorVersion().

  See Also:

  Constant Field Values

Constructor Detail

• WinZipAesEntryExtraField

  WinZipAesEntryExtraField()

  Constructs a new WinZip AES Extra Field.

Method Detail

• encryptionStrength

  private static byte encryptionStrength(AesKeyStrength keyStrength)

• getDataSize

  int getDataSize()

  Description copied from class: ExtraField
  Returns the Data Size of this Extra Field. The Data Size is an unsigned short integer (two bytes) which indicates the length of the Data Block in bytes and does not include its own size in this Extra Field. This property may be initialized by calling ExtraField.readFrom(byte[], int, int).

  Specified by:

  getDataSize in class ExtraField

  Returns:

  The size of the Data Block in bytes or 0 if unknown.

  See Also:

  ExtraField.getDataBlock()

• getHeaderId

  int getHeaderId()

  Description copied from class: ExtraField
  Returns the Header ID (type) of this Extra Field. The Header ID is an unsigned short integer (two bytes) which must be constant during the life cycle of this object.

  Specified by:

  getHeaderId in class ExtraField

• getKeyStrength

  AesKeyStrength getKeyStrength()

• getMethod

  int getMethod()

• getVendorId

  int getVendorId()

• getVendorVersion

  int getVendorVersion()

  Returns the vendor version.

  See Also:

  VV_AE_1, VV_AE_2

• keyStrength

  private static AesKeyStrength keyStrength(int encryptionStrength)

• readFrom

  void readFrom(byte[] src,
              int off,
              int size)

  Description copied from class: ExtraField
  Initializes this Extra Field by deserializing a Data Block of size bytes from the byte array data at the zero based offset off. Upon return, this Extra Field shall not access data subsequently and ExtraField.getDataSize() must equal size.

  Specified by:

  readFrom in class ExtraField

  Parameters:

  src - The byte array to read the Data Block from.

  off - The zero based offset in the byte array where the first byte of the Data Block is read from.

  size - The length of the Data Block in bytes.

  See Also:

  ExtraField.getDataSize()

• setKeyStrength

  void setKeyStrength(AesKeyStrength keyStrength)

• setMethod

  void setMethod(int compressionMethod)

• setVendorVersion

  void setVendorVersion(int vendorVersion)

  Sets the vendor version.

  Parameters:

  vendorVersion - the vendor version.

  Throws:

  IllegalArgumentException

  See Also:

  VV_AE_1, VV_AE_2

• writeTo

  void writeTo(byte[] dst,
             int off)

  Description copied from class: ExtraField
  Serializes a Data Block of ExtraField.getDataSize() bytes to the byte array data at the zero based offset off. Upon return, this Extra Field shall not access data subsequently.

  Specified by:

  writeTo in class ExtraField

  Parameters:

  dst - The byte array to write the Data Block to.

  off - The zero based offset in the byte array where the first byte of the Data Block is written to.

  See Also:

  ExtraField.getDataSize()