/usr/lib/python3/dist-packages/passlib/handlers/ldap_digests.py is in python3-passlib 1.5.3-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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"""
#=========================================================
#imports
#=========================================================
#core
from base64 import b64encode, b64decode
from hashlib import md5, sha1
import logging; log = logging.getLogger(__name__)
import re
from warnings import warn
#site
#libs
from passlib.utils import handlers as uh, unix_crypt_schemes, b, bytes, to_hash_str
#pkg
#local
__all__ = [
"ldap_plaintext",
"ldap_md5",
"ldap_sha1",
"ldap_salted_md5",
"ldap_salted_sha1",
##"get_active_ldap_crypt_schemes",
"ldap_des_crypt",
"ldap_bsdi_crypt",
"ldap_md5_crypt",
"ldap_sha1_crypt"
"ldap_bcrypt",
"ldap_sha256_crypt",
"ldap_sha512_crypt",
]
#=========================================================
#ldap helpers
#=========================================================
#reference - http://www.openldap.org/doc/admin24/security.html
class _Base64DigestHelper(uh.StaticHandler):
"helper for ldap_md5 / ldap_sha1"
#XXX: could combine this with hex digests in digests.py
ident = None #required - prefix identifier
_hash_func = None #required - hash function
_pat = None #required - regexp to recognize hash
checksum_chars = uh.PADDED_B64_CHARS
@classmethod
def identify(cls, hash):
return uh.identify_regexp(hash, cls._pat)
@classmethod
def genhash(cls, secret, hash):
if secret is None:
raise TypeError("no secret provided")
if isinstance(secret, str):
secret = secret.encode("utf-8")
if hash is not None and not cls.identify(hash):
raise ValueError("not a %s hash" % (cls.name,))
chk = cls._hash_func(secret).digest()
hash = cls.ident + b64encode(chk).decode("ascii")
return to_hash_str(hash)
class _SaltedBase64DigestHelper(uh.HasRawSalt, uh.HasRawChecksum, uh.GenericHandler):
"helper for ldap_salted_md5 / ldap_salted_sha1"
setting_kwds = ("salt",)
checksum_chars = uh.PADDED_B64_CHARS
ident = None #required - prefix identifier
_hash_func = None #required - hash function
_pat = None #required - regexp to recognize hash
_stub_checksum = None #required - default checksum to plug in
min_salt_size = max_salt_size = 4
@classmethod
def identify(cls, hash):
return uh.identify_regexp(hash, cls._pat)
@classmethod
def from_string(cls, hash):
if not hash:
raise ValueError("no hash specified")
if isinstance(hash, bytes):
hash = hash.decode('ascii')
m = cls._pat.match(hash)
if not m:
raise ValueError("not a %s hash" % (cls.name,))
data = b64decode(m.group("tmp").encode("ascii"))
chk, salt = data[:-4], data[-4:]
return cls(checksum=chk, salt=salt, strict=True)
def to_string(self):
data = (self.checksum or self._stub_checksum) + self.salt
hash = self.ident + b64encode(data).decode("ascii")
return to_hash_str(hash)
def calc_checksum(self, secret):
if secret is None:
raise TypeError("no secret provided")
if isinstance(secret, str):
secret = secret.encode("utf-8")
return self._hash_func(secret + self.salt).digest()
#=========================================================
#implementations
#=========================================================
class ldap_md5(_Base64DigestHelper):
"""This class stores passwords using LDAP's plain MD5 format, and follows the :ref:`password-hash-api`.
The :meth:`encrypt()` and :meth:`genconfig` methods have no optional keywords.
"""
name = "ldap_md5"
setting_kwds = ()
ident = "{MD5}"
_hash_func = md5
_pat = re.compile(r"^\{MD5\}(?P<chk>[+/a-zA-Z0-9]{22}==)$")
class ldap_sha1(_Base64DigestHelper):
"""This class stores passwords using LDAP's plain SHA1 format, and follows the :ref:`password-hash-api`.
The :meth:`encrypt()` and :meth:`genconfig` methods have no optional keywords.
"""
name = "ldap_sha1"
setting_kwds = ()
ident = "{SHA}"
_hash_func = sha1
_pat = re.compile(r"^\{SHA\}(?P<chk>[+/a-zA-Z0-9]{27}=)$")
class ldap_salted_md5(_SaltedBase64DigestHelper):
"""This class stores passwords using LDAP's salted MD5 format, and follows the :ref:`password-hash-api`.
It supports a 4-byte salt.
The :meth:`encrypt()` and :meth:`genconfig` methods accept the following optional keyword:
:param salt:
Optional salt string.
If not specified, one will be autogenerated (this is recommended).
If specified, it must be a 4 byte string; each byte may have any value from 0x00 .. 0xff.
"""
name = "ldap_salted_md5"
ident = "{SMD5}"
_hash_func = md5
_pat = re.compile(r"^\{SMD5\}(?P<tmp>[+/a-zA-Z0-9]{27}=)$")
_stub_checksum = b('\x00') * 16
class ldap_salted_sha1(_SaltedBase64DigestHelper):
"""This class stores passwords using LDAP's salted SHA1 format, and follows the :ref:`password-hash-api`.
It supports a 4-byte salt.
The :meth:`encrypt()` and :meth:`genconfig` methods accept the following optional keyword:
:param salt:
Optional salt string.
If not specified, one will be autogenerated (this is recommended).
If specified, it must be a 4 byte string; each byte may have any value from 0x00 .. 0xff.
"""
name = "ldap_salted_sha1"
ident = "{SSHA}"
_hash_func = sha1
_pat = re.compile(r"^\{SSHA\}(?P<tmp>[+/a-zA-Z0-9]{32})$")
_stub_checksum = b('\x00') * 20
class ldap_plaintext(uh.StaticHandler):
"""This class stores passwords in plaintext, and follows the :ref:`password-hash-api`.
This class acts much like the generic :class:`!passlib.hash.plaintext` handler,
except that it will identify a hash only if it does NOT begin with the ``{XXX}`` identifier prefix
used by RFC2307 passwords.
Unicode passwords will be encoded using utf-8.
"""
name = "ldap_plaintext"
_2307_pat = re.compile(r"^\{\w+\}.*$")
@classmethod
def identify(cls, hash):
if not hash:
return False
if isinstance(hash, bytes):
try:
hash = hash.decode("utf-8")
except UnicodeDecodeError:
return False
#NOTE: identifies all strings EXCEPT those which match...
return cls._2307_pat.match(hash) is None
@classmethod
def genhash(cls, secret, hash):
if hash is not None and not cls.identify(hash):
raise ValueError("not a valid ldap_plaintext hash")
if secret is None:
raise TypeError("secret must be string")
return to_hash_str(secret, "utf-8")
@classmethod
def _norm_hash(cls, hash):
if isinstance(hash, bytes):
#XXX: current code uses utf-8
# if existing hashes use something else,
# probably have to modify this code to allow hash_encoding
# to be specified as an option.
hash = hash.decode("utf-8")
return hash
#=========================================================
#{CRYPT} wrappers
#=========================================================
# the following are wrappers around the base crypt algorithms,
# which add the ldap required {CRYPT} prefix
ldap_crypt_schemes = [ 'ldap_' + name for name in unix_crypt_schemes ]
def _init_ldap_crypt_handlers():
#XXX: it's not nice to play in globals like this,
# but don't want to write all all these handlers
g = globals()
for wname in unix_crypt_schemes:
name = 'ldap_' + wname
g[name] = uh.PrefixWrapper(name, wname, prefix="{CRYPT}", lazy=True)
del g
_init_ldap_crypt_handlers()
##_lcn_host = None
##def get_host_ldap_crypt_schemes():
## global _lcn_host
## if _lcn_host is None:
## from passlib.hosts import host_context
## schemes = host_context.policy.schemes()
## _lcn_host = [
## "ldap_" + name
## for name in unix_crypt_names
## if name in schemes
## ]
## return _lcn_host
#=========================================================
#eof
#=========================================================
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