def stringToDN(string, tag=None):
"""Takes a string representing a distinguished name or directory
name and returns a Name for use by pyasn1. See the documentation
for the issuer and subject fields for more details. Takes an
optional implicit tag in cases where the Name needs to be tagged
differently."""
if '/' not in string:
string = '/CN=%s' % string
rdns = rfc2459.RDNSequence()
pos = 0
pattern = '/(C|ST|L|O|OU|CN|emailAddress)='
split = re.split(pattern, string)
# split should now be [[encoding], <type>, <value>, <type>, <value>, ...]
if split[0]:
encoding = split[0]
else:
encoding = 'utf8String'
for (nameType, value) in zip(split[1::2], split[2::2]):
ava = rfc2459.AttributeTypeAndValue()
if nameType == 'C':
ava.setComponentByName('type', rfc2459.id_at_countryName)
nameComponent = rfc2459.X520countryName(value)
elif nameType == 'ST':
ava.setComponentByName('type', rfc2459.id_at_stateOrProvinceName)
nameComponent = rfc2459.X520StateOrProvinceName()
elif nameType == 'L':
ava.setComponentByName('type', rfc2459.id_at_localityName)
nameComponent = rfc2459.X520LocalityName()
elif nameType == 'O':
ava.setComponentByName('type', rfc2459.id_at_organizationName)
nameComponent = rfc2459.X520OrganizationName()
elif nameType == 'OU':
ava.setComponentByName('type',
rfc2459.id_at_organizationalUnitName)
nameComponent = rfc2459.X520OrganizationalUnitName()
elif nameType == 'CN':
ava.setComponentByName('type', rfc2459.id_at_commonName)
nameComponent = rfc2459.X520CommonName()
elif nameType == 'emailAddress':
ava.setComponentByName('type', rfc2459.emailAddress)
nameComponent = rfc2459.Pkcs9email(value)
else:
raise UnknownDNTypeError(nameType)
if not nameType == 'C' and not nameType == 'emailAddress':
# The value may have things like '\0' (i.e. a slash followed by
# the number zero) that have to be decoded into the resulting
# '\x00' (i.e. a byte with value zero).
nameComponent.setComponentByName(
encoding, value.decode(encoding='string_escape'))
ava.setComponentByName('value', nameComponent)
rdn = rfc2459.RelativeDistinguishedName()
rdn.setComponentByPosition(0, ava)
rdns.setComponentByPosition(pos, rdn)
pos = pos + 1
if tag:
name = rfc2459.Name().subtype(implicitTag=tag)
else:
name = rfc2459.Name()
name.setComponentByPosition(0, rdns)
return name
def stringToDN(string, tag=None):
"""Takes a string representing a distinguished name or directory
name and returns a Name for use by pyasn1. See the documentation
for the issuer and subject fields for more details. Takes an
optional implicit tag in cases where the Name needs to be tagged
differently."""
if string and "/" not in string:
string = "/CN=%s" % string
rdns = rfc2459.RDNSequence()
pattern = "/(C|ST|L|O|OU|CN|emailAddress)="
split = re.split(pattern, string)
# split should now be [[encoding], <type>, <value>, <type>, <value>, ...]
if split[0]:
encoding = split[0]
else:
encoding = "utf8String"
for pos, (nameType, value) in enumerate(zip(split[1::2], split[2::2])):
ava = rfc2459.AttributeTypeAndValue()
if nameType == "C":
ava["type"] = rfc2459.id_at_countryName
nameComponent = rfc2459.X520countryName(value)
elif nameType == "ST":
ava["type"] = rfc2459.id_at_stateOrProvinceName
nameComponent = rfc2459.X520StateOrProvinceName()
elif nameType == "L":
ava["type"] = rfc2459.id_at_localityName
nameComponent = rfc2459.X520LocalityName()
elif nameType == "O":
ava["type"] = rfc2459.id_at_organizationName
nameComponent = rfc2459.X520OrganizationName()
elif nameType == "OU":
ava["type"] = rfc2459.id_at_organizationalUnitName
nameComponent = rfc2459.X520OrganizationalUnitName()
elif nameType == "CN":
ava["type"] = rfc2459.id_at_commonName
nameComponent = rfc2459.X520CommonName()
elif nameType == "emailAddress":
ava["type"] = rfc2459.emailAddress
nameComponent = rfc2459.Pkcs9email(value)
else:
raise UnknownDNTypeError(nameType)
if not nameType == "C" and not nameType == "emailAddress":
# The value may have things like '\0' (i.e. a slash followed by
# the number zero) that have to be decoded into the resulting
# '\x00' (i.e. a byte with value zero).
nameComponent[encoding] = six.ensure_binary(value).decode(
encoding="unicode_escape"
)
ava["value"] = nameComponent
rdn = rfc2459.RelativeDistinguishedName()
rdn.setComponentByPosition(0, ava)
rdns.setComponentByPosition(pos, rdn)
if tag:
name = rfc2459.Name().subtype(implicitTag=tag)
else:
name = rfc2459.Name()
name.setComponentByPosition(0, rdns)
return name
def DNToString(dn):
rdns = dn.getComponent()
ret = ''
for rdn in rdns:
ret += '['
for attr in rdn:
attrType = attr.getComponentByName('type')
if attrType == rfc2459.emailAddress:
val, rest = decoder.decode(attr.getComponentByName('value'),
asn1Spec=rfc2459.Pkcs9email())
assert rest == ""
# Strictly speaking, this is IA5, not ASCII.
val = str(val).decode('ascii')
else:
val, rest = decoder.decode(attr.getComponentByName('value'),
asn1Spec=rfc2459.X520name())
assert rest == ""
valt = val.getName()
val = val.getComponent()
if valt == 'printableString':
val = str(val)
elif valt == 'teletexString':
# Strictly this is a T.61 string. T.61 no longer exists as a
# standard and some certs mark ISO 8859-1 as
# teletexString. And we should never see this, but we do.
val = str(val).decode('iso8859-1')
elif valt == 'utf8String':
val = str(val)
else:
print valt
assert False
assert val is not None
ret += '/' + str(attrType) + '=' + val
ret += ']'
return ret
