Apply the archive read from r to the given hashchainFile and patchDir.

ApplyEncryptedFile applies the encrypted archive in filename to the given hashchainFile and patchDir.

ApplyFile applies the archive in filename to the given hashchainFile and patchDir.

Create a new archive for the given hash chain and write it to w.

CreateDist creates a distribution file with filename for hash chain c.

CreateEncryptedDist creates an encrypted distribution file with filename for hash chain c.

ErrCannotDecrypt is returned if an encrypted archive cannot be decrypted.

ErrUnknownFile is returned if an archive contains an unknown file.