# Path: pgp/utils.py
# def sign_hash(pub_algorithm_type, secret_key, hash_, k=None):
# def verify_hash(pub_algorithm_type, public_key, hash_, values):
# def get_hash_instance(type_):
# def get_public_key_constructor(type_):
#     def __init__(self, *args, **kwargs):
#     def encrypt(self, block):
#     def decrypt(self, block):
# def get_symmetric_cipher(type_, key, mode, iv=None, segment_size=None,
#                          syncable=False):
#     def compress(self, data):
#     def decompress(self, data):
#     def flush(self):
#     def __init__(self, level):
#     def compress(self, data):
#     def decompress(self, data):
#     def flush(self):
#     def __init__(self, level):
#     def compress(self, data):
#     def decompress(self, data):
#     def flush(self):
# def get_compression_instance(type_, level=None):
# def hash_key(data_to_hash, key_packet_data):
# def packet_type_from_first_byte(byte_):
# def hash_user_data(data_to_hash, target_type, target_packet_data,
#                    signature_version):
# def hash_packet_for_signature(packet_for_hash,
#                               signature_type, signature_version,
#                               hash_algorithm_type, signature_creation_time,
#                               pub_algorithm_type, public_key_packet=None,
#                               hashed_subpacket_data=None,
#                               fake_hash_algorithm_type=None):
# def bytes_to_int(bytes_, offset, length):
# def byte_to_int(bytes_, offset):
# def short_to_int(bytes_, offset):
# def long_to_int(bytes_, offset):
# def mpi_length(bytes_, offset):
# def mpi_to_int(bytes_, offset):
# def int_to_bytes(i):
# def int_to_2byte(i):
# def int_to_4byte(i):
# def int_to_8byte(i):
# def s2k_count_to_int(byte, offset=0):
# def int_to_s2k_count(i):
# def int_to_hex(i, expected_size=None):
# def int_to_mpi(i):
# def old_packet_length_from_stream(fh):
# def old_packet_length(data, offset):
# def new_packet_length_from_stream(fh):
# def new_packet_length(data, offset):
# def new_packet_length_to_bytes(data_length, allow_partial):
# def old_packet_length_to_bytes(data_length):
# def hex_to_bytes(hex_val, expected_length=None):
# def bytearray_to_hex(arr, offset=0, expected=None):
# def compare_packets(packet1, packet2):
# def sort_key(packets):
# def concat_key(packets):
# def hash_key_data(packets):
# def get_signature_values(signature_packet_data):
# def key_packet_fingerprint(packet):
# class NoopCipher():
# class NoopCompression(object):
# class ZlibCompression(object):
# class DeflateCompression(object):
# ECB = blockalgo.MODE_ECB
# CBC = blockalgo.MODE_CBC
# CFB = blockalgo.MODE_CFB
# OFB = blockalgo.MODE_OFB
# CTR = blockalgo.MODE_CTR
# OPENPGP = blockalgo.MODE_OPENPGP
# EXPBIAS = 6
# MAX_PACKET_LENGTH = 4294967295


import math
from pgp import utils
    mode = 0

    @classmethod
    def from_bytes(cls, symmetric_algorithm, data, offset=0):
        hash_algorithm = data[offset]
        offset += 1
        return cls(hash_algorithm, symmetric_algorithm), offset

    def __init__(self, hash_algorithm, symmetric_algorithm, *args, **kwargs):
        self.hash_algorithm = hash_algorithm
        self.symmetric_algorithm = symmetric_algorithm
        self.salt = bytearray()
        self.count = None

    def __eq__(self, other):
        return (
            self.__class__ == other.__class__
            and self.hash_algorithm == other.hash_algorithm
            and self.symmetric_algorithm == other.symmetric_algorithm
            and self.salt == other.salt
            and self.count == other.count
            )

    def __bytes__(self):
        return bytes(
            bytearray([self.mode, self.hash_algorithm]) +
            bytearray(self.salt)
            )

    def to_key(self, passphrase):

# Path: pgp/utils.py
# def sign_hash(pub_algorithm_type, secret_key, hash_, k=None):
# def verify_hash(pub_algorithm_type, public_key, hash_, values):
# def get_hash_instance(type_):
# def get_public_key_constructor(type_):
#     def __init__(self, *args, **kwargs):
#     def encrypt(self, block):
#     def decrypt(self, block):
# def get_symmetric_cipher(type_, key, mode, iv=None, segment_size=None,
#                          syncable=False):
#     def compress(self, data):
#     def decompress(self, data):
#     def flush(self):
#     def __init__(self, level):
#     def compress(self, data):
#     def decompress(self, data):
#     def flush(self):
#     def __init__(self, level):
#     def compress(self, data):
#     def decompress(self, data):
#     def flush(self):
# def get_compression_instance(type_, level=None):
# def hash_key(data_to_hash, key_packet_data):
# def packet_type_from_first_byte(byte_):
# def hash_user_data(data_to_hash, target_type, target_packet_data,
#                    signature_version):
# def hash_packet_for_signature(packet_for_hash,
#                               signature_type, signature_version,
#                               hash_algorithm_type, signature_creation_time,
#                               pub_algorithm_type, public_key_packet=None,
#                               hashed_subpacket_data=None,
#                               fake_hash_algorithm_type=None):
# def bytes_to_int(bytes_, offset, length):
# def byte_to_int(bytes_, offset):
# def short_to_int(bytes_, offset):
# def long_to_int(bytes_, offset):
# def mpi_length(bytes_, offset):
# def mpi_to_int(bytes_, offset):
# def int_to_bytes(i):
# def int_to_2byte(i):
# def int_to_4byte(i):
# def int_to_8byte(i):
# def s2k_count_to_int(byte, offset=0):
# def int_to_s2k_count(i):
# def int_to_hex(i, expected_size=None):
# def int_to_mpi(i):
# def old_packet_length_from_stream(fh):
# def old_packet_length(data, offset):
# def new_packet_length_from_stream(fh):
# def new_packet_length(data, offset):
# def new_packet_length_to_bytes(data_length, allow_partial):
# def old_packet_length_to_bytes(data_length):
# def hex_to_bytes(hex_val, expected_length=None):
# def bytearray_to_hex(arr, offset=0, expected=None):
# def compare_packets(packet1, packet2):
# def sort_key(packets):
# def concat_key(packets):
# def hash_key_data(packets):
# def get_signature_values(signature_packet_data):
# def key_packet_fingerprint(packet):
# class NoopCipher():
# class NoopCompression(object):
# class ZlibCompression(object):
# class DeflateCompression(object):
# ECB = blockalgo.MODE_ECB
# CBC = blockalgo.MODE_CBC
# CFB = blockalgo.MODE_CFB
# OFB = blockalgo.MODE_OFB
# CTR = blockalgo.MODE_CTR
# OPENPGP = blockalgo.MODE_OPENPGP
# EXPBIAS = 6
# MAX_PACKET_LENGTH = 4294967295


# Path: pgp/s2k.py
import math
from pgp import utils

    mode = 0

    @classmethod
    def from_bytes(cls, symmetric_algorithm, data, offset=0):
        hash_algorithm = data[offset]
        offset += 1
        return cls(hash_algorithm, symmetric_algorithm), offset

    def __init__(self, hash_algorithm, symmetric_algorithm, *args, **kwargs):
        self.hash_algorithm = hash_algorithm
        self.symmetric_algorithm = symmetric_algorithm
        self.salt = bytearray()
        self.count = None

    def __eq__(self, other):
        return (
            self.__class__ == other.__class__
            and self.hash_algorithm == other.hash_algorithm
            and self.symmetric_algorithm == other.symmetric_algorithm
            and self.salt == other.salt
            and self.count == other.count
            )

    def __bytes__(self):
        return bytes(
            bytearray([self.mode, self.hash_algorithm]) +
            bytearray(self.salt)
            )

    def to_key(self, passphrase):

        required_length = utils.symmetric_cipher_key_lengths.get(