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q@=q¦nõ1hßÁƒqðÀ¿Ã õ    # -*- coding: utf-8 -*-
#
# ===================================================================
# The contents of this file are dedicated to the public domain.  To
# the extent that dedication to the public domain is not available,
# everyone is granted a worldwide, perpetual, royalty-free,
# non-exclusive license to exercise all rights associated with the
# contents of this file for any purpose whatsoever.
# No rights are reserved.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# ===================================================================

from Crypto.Util.py3compat import bord

from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
                                  VoidPointer, SmartPointer,
                                  create_string_buffer,
                                  get_raw_buffer, c_size_t,
                                  c_uint8_ptr)

_raw_sha224_lib = load_pycryptodome_raw_lib("Crypto.Hash._SHA224",
                        """
                        int SHA224_init(void **shaState);
                        int SHA224_destroy(void *shaState);
                        int SHA224_update(void *hs,
                                          const uint8_t *buf,
                                          size_t len);
                        int SHA224_digest(const void *shaState,
                                          uint8_t *digest,
                                          size_t digest_size);
                        int SHA224_copy(const void *src, void *dst);

                        int SHA224_pbkdf2_hmac_assist(const void *inner,
                                            const void *outer,
                                            const uint8_t *first_digest,
                                            uint8_t *final_digest,
                                            size_t iterations,
                                            size_t digest_size);
                        """)

class SHA224Hash(object):
    """A SHA-224 hash object.
    Do not instantiate directly.
    Use the :func:`new` function.

    :ivar oid: ASN.1 Object ID
    :vartype oid: string

    :ivar block_size: the size in bytes of the internal message block,
                      input to the compression function
    :vartype block_size: integer

    :ivar digest_size: the size in bytes of the resulting hash
    :vartype digest_size: integer
    """

    # The size of the resulting hash in bytes.
    digest_size = 28
    # The internal block size of the hash algorithm in bytes.
    block_size = 64
    # ASN.1 Object ID
    oid = '2.16.840.1.101.3.4.2.4'

    def __init__(self, data=None):
        state = VoidPointer()
        result = _raw_sha224_lib.SHA224_init(state.address_of())
        if result:
            raise ValueError("Error %d while instantiating SHA224"
                             % result)
        self._state = SmartPointer(state.get(),
                                   _raw_sha224_lib.SHA224_destroy)
        if data:
            self.update(data)

    def update(self, data):
        """Continue hashing of a message by consuming the next chunk of data.

        Args:
            data (byte string/byte array/memoryview): The next chunk of the message being hashed.
        """

        result = _raw_sha224_lib.SHA224_update(self._state.get(),
                                               c_uint8_ptr(data),
                                               c_size_t(len(data)))
        if result:
            raise ValueError("Error %d while hashing data with SHA224"
                             % result)

    def digest(