CasperSecurity
#
# This file is part of pyasn1 software.
#
# Copyright (c) 2005-2019, Ilya Etingof <etingof@gmail.com>
# License: http://snmplabs.com/pyasn1/license.html
#
import sys
from pyasn1 import error
from pyasn1.type import tag
from pyasn1.type import univ
__all__ = ['NumericString', 'PrintableString', 'TeletexString', 'T61String', 'VideotexString',
'IA5String', 'GraphicString', 'VisibleString', 'ISO646String',
'GeneralString', 'UniversalString', 'BMPString', 'UTF8String']
NoValue = univ.NoValue
noValue = univ.noValue
class AbstractCharacterString(univ.OctetString):
"""Creates |ASN.1| schema or value object.
|ASN.1| class is based on :class:`~pyasn1.type.base.SimpleAsn1Type`,
its objects are immutable and duck-type Python 2 :class:`str` or Python 3
:class:`bytes`. When used in octet-stream context, |ASN.1| type assumes
"|encoding|" encoding.
Keyword Args
------------
value: :class:`unicode`, :class:`str`, :class:`bytes` or |ASN.1| object
:class:`unicode` object (Python 2) or :class:`str` (Python 3),
alternatively :class:`str` (Python 2) or :class:`bytes` (Python 3)
representing octet-stream of serialised unicode string
(note `encoding` parameter) or |ASN.1| class instance.
If `value` is not given, schema object will be created.
tagSet: :py:class:`~pyasn1.type.tag.TagSet`
Object representing non-default ASN.1 tag(s)
subtypeSpec: :py:class:`~pyasn1.type.constraint.ConstraintsIntersection`
Object representing non-default ASN.1 subtype constraint(s). Constraints
verification for |ASN.1| type occurs automatically on object
instantiation.
encoding: :py:class:`str`
Unicode codec ID to encode/decode :class:`unicode` (Python 2) or
:class:`str` (Python 3) the payload when |ASN.1| object is used
in octet-stream context.
Raises
------
~pyasn1.error.ValueConstraintError, ~pyasn1.error.PyAsn1Error
On constraint violation or bad initializer.
"""
if sys.version_info[0] <= 2:
def __str__(self):
try:
# `str` is Py2 text representation
return self._value.encode(self.encoding)
except UnicodeEncodeError:
exc = sys.exc_info()[1]
raise error.PyAsn1UnicodeEncodeError(
"Can't encode string '%s' with codec "
"%s" % (self._value, self.encoding), exc
)
def __unicode__(self):
return unicode(self._value)
def prettyIn(self, value):
try:
if isinstance(value, unicode):
return value
elif isinstance(value, str):
return value.decode(self.encoding)
elif isinstance(value, (tuple, list)):
return self.prettyIn(''.join([chr(x) for x in value]))
elif isinstance(value, univ.OctetString):
return value.asOctets().decode(self.encoding)
else:
return unicode(value)
except (UnicodeDecodeError, LookupError):
exc = sys.exc_info()[1]
raise error.PyAsn1UnicodeDecodeError(
"Can't decode string '%s' with codec "
"%s" % (value, self.encoding), exc
)
def asOctets(self, padding=True):
return str(self)
def asNumbers(self, padding=True):
return tuple([ord(x) for x in str(self)])
else:
def __str__(self):
# `unicode` is Py3 text representation
return str(self._value)
def __bytes__(self):
try:
return self._value.encode(self.encoding)
except UnicodeEncodeError:
exc = sys.exc_info()[1]
raise error.PyAsn1UnicodeEncodeError(
"Can't encode string '%s' with codec "
"%s" % (self._value, self.encoding), exc
)
def prettyIn(self, value):
try:
if isinstance(value, str):
return value
elif isinstance(value, bytes):
return value.decode(self.encoding)
elif isinstance(value, (tuple, list)):
return self.prettyIn(bytes(value))
elif isinstance(value, univ.OctetString):
return value.asOctets().decode(self.encoding)
else:
return str(value)
except (UnicodeDecodeError, LookupError):
exc = sys.exc_info()[1]
raise error.PyAsn1UnicodeDecodeError(
"Can't decode string '%s' with codec "
"%s" % (value, self.encoding), exc
)
def asOctets(self, padding=True):
return bytes(self)
def asNumbers(self, padding=True):
return tuple(bytes(self))
#
# See OctetString.prettyPrint() for the explanation
#
def prettyOut(self, value):
return value
def prettyPrint(self, scope=0):
# first see if subclass has its own .prettyOut()
value = self.prettyOut(self._value)
if value is not self._value:
return value
return AbstractCharacterString.__str__(self)
def __reversed__(self):
return reversed(self._value)
class NumericString(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 18)
)
encoding = 'us-ascii'
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class PrintableString(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 19)
)
encoding = 'us-ascii'
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class TeletexString(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 20)
)
encoding = 'iso-8859-1'
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class T61String(TeletexString):
__doc__ = TeletexString.__doc__
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class VideotexString(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 21)
)
encoding = 'iso-8859-1'
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class IA5String(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 22)
)
encoding = 'us-ascii'
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class GraphicString(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 25)
)
encoding = 'iso-8859-1'
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class VisibleString(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 26)
)
encoding = 'us-ascii'
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class ISO646String(VisibleString):
__doc__ = VisibleString.__doc__
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class GeneralString(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 27)
)
encoding = 'iso-8859-1'
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class UniversalString(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 28)
)
encoding = "utf-32-be"
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class BMPString(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 30)
)
encoding = "utf-16-be"
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()
class UTF8String(AbstractCharacterString):
__doc__ = AbstractCharacterString.__doc__
#: Set (on class, not on instance) or return a
#: :py:class:`~pyasn1.type.tag.TagSet` object representing ASN.1 tag(s)
#: associated with |ASN.1| type.
tagSet = AbstractCharacterString.tagSet.tagImplicitly(
tag.Tag(tag.tagClassUniversal, tag.tagFormatSimple, 12)
)
encoding = "utf-8"
# Optimization for faster codec lookup
typeId = AbstractCharacterString.getTypeId()