C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// """HMAC (Keyed-Hashing for Message Authentication) module. Implements the HMAC algorithm as described by RFC 2104. """ import warnings as _warnings try: import _hashlib as _hashopenssl except ImportError: _hashopenssl = None _functype = None from _operator import _compare_digest as compare_digest else: compare_digest = _hashopenssl.compare_digest _functype = type(_hashopenssl.openssl_sha256) # builtin type import hashlib as _hashlib trans_5C = bytes((x ^ 0x5C) for x in range(256)) trans_36 = bytes((x ^ 0x36) for x in range(256)) # The size of the digests returned by HMAC depends on the underlying # hashing module used. Use digest_size from the instance of HMAC instead. digest_size = None class HMAC: """RFC 2104 HMAC class. Also complies with RFC 4231. This supports the API for Cryptographic Hash Functions (PEP 247). """ blocksize = 64 # 512-bit HMAC; can be changed in subclasses. __slots__ = ( "_hmac", "_inner", "_outer", "block_size", "digest_size" ) def __init__(self, key, msg=None, digestmod=''): """Create a new HMAC object. key: bytes or buffer, key for the keyed hash object. msg: bytes or buffer, Initial input for the hash or None. digestmod: A hash name suitable for hashlib.new(). *OR* A hashlib constructor returning a new hash object. *OR* A module supporting PEP 247. Required as of 3.8, despite its position after the optional msg argument. Passing it as a keyword argument is recommended, though not required for legacy API reasons. """ if not isinstance(key, (bytes, bytearray)): raise TypeError("key: expected bytes or bytearray, but got %r" % type(key).__name__) if not digestmod: raise TypeError("Missing required argument 'digestmod'.") if _hashopenssl and isinstance(digestmod, (str, _functype)): try: self._init_hmac(key, msg, digestmod) except _hashopenssl.UnsupportedDigestmodError: self._init_old(key, msg, digestmod) else: self._init_old(key, msg, digestmod) def _init_hmac(self, key, msg, digestmod): self._hmac = _hashopenssl.hmac_new(key, msg, digestmod=digestmod) self.digest_size = self._hmac.digest_size self.block_size = self._hmac.block_size def _init_old(self, key, msg, digestmod): if callable(digestmod): digest_cons = digestmod elif isinstance(digestmod, str): digest_cons = lambda d=b'': _hashlib.new(digestmod, d) else: digest_cons = lambda d=b'': digestmod.new(d) self._hmac = None self._outer = digest_cons() self._inner = digest_cons() self.digest_size = self._inner.digest_size if hasattr(self._inner, 'block_size'): blocksize = self._inner.block_size if blocksize < 16: _warnings.warn('block_size of %d seems too small; using our ' 'default of %d.' % (blocksize, self.blocksize), RuntimeWarning, 2) blocksize = self.blocksize else: _warnings.warn('No block_size attribute on given digest object; ' 'Assuming %d.' % (self.blocksize), RuntimeWarning, 2) blocksize = self.blocksize if len(key) > blocksize: key = digest_cons(key).digest() # self.blocksize is the default blocksize. self.block_size is # effective block size as well as the public API attribute. self.block_size = blocksize key = key.ljust(blocksize, b'\0') self._outer.update(key.translate(trans_5C)) self._inner.update(key.translate(trans_36)) if msg is not None: self.update(msg) @property def name(self): if self._hmac: return self._hmac.name else: return f"hmac-{self._inner.name}" def update(self, msg): """Feed data from msg into this hashing object.""" inst = self._hmac or self._inner inst.update(msg) def copy(self): """Return a separate copy of this hashing object. An update to this copy won't affect the original object. """ # Call __new__ directly to avoid the expensive __init__. other = self.__class__.__new__(self.__class__) other.digest_size = self.digest_size if self._hmac: other._hmac = self._hmac.copy() other._inner = other._outer = None else: other._hmac = None other._inner = self._inner.copy() other._outer = self._outer.copy() return other def _current(self): """Return a hash object for the current state. To be used only internally with digest() and hexdigest(). """ if self._hmac: return self._hmac else: h = self._outer.copy() h.update(self._inner.digest()) return h def digest(self): """Return the hash value of this hashing object. This returns the hmac value as bytes. The object is not altered in any way by this function; you can continue updating the object after calling this function. """ h = self._current() return h.digest() def hexdigest(self): """Like digest(), but returns a string of hexadecimal digits instead. """ h = self._current() return h.hexdigest() def new(key, msg=None, digestmod=''): """Create a new hashing object and return it. key: bytes or buffer, The starting key for the hash. msg: bytes or buffer, Initial input for the hash, or None. digestmod: A hash name suitable for has