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#!/usr/bin/env python
#
# create schema.ldif (as a string) from WSPP documentation
#
# based on minschema.py and minschema_wspp
#
import re
import base64
bitFields = {}
# ADTS: 2.2.9
# bit positions as labeled in the docs
bitFields["searchflags"] = {
'fATTINDEX': 31, # IX
'fPDNTATTINDEX': 30, # PI
'fANR': 29, #AR
'fPRESERVEONDELETE': 28, # PR
'fCOPY': 27, # CP
'fTUPLEINDEX': 26, # TP
'fSUBTREEATTINDEX': 25, # ST
'fCONFIDENTIAL': 24, # CF
'fNEVERVALUEAUDIT': 23, # NV
'fRODCAttribute': 22, # RO
# missing in ADTS but required by LDIF
'fRODCFilteredAttribute': 22, # RO ?
'fCONFIDENTAIL': 24, # typo
'fRODCFILTEREDATTRIBUTE': 22 # case
}
# ADTS: 2.2.10
bitFields["systemflags"] = {
'FLAG_ATTR_NOT_REPLICATED': 31, 'FLAG_CR_NTDS_NC': 31, # NR
'FLAG_ATTR_REQ_PARTIAL_SET_MEMBER': 30, 'FLAG_CR_NTDS_DOMAIN': 30, # PS
'FLAG_ATTR_IS_CONSTRUCTED': 29, 'FLAG_CR_NTDS_NOT_GC_REPLICATED': 29, # CS
'FLAG_ATTR_IS_OPERATIONAL': 28, # OP
'FLAG_SCHEMA_BASE_OBJECT': 27, # BS
'FLAG_ATTR_IS_RDN': 26, # RD
'FLAG_DISALLOW_MOVE_ON_DELETE': 6, # DE
'FLAG_DOMAIN_DISALLOW_MOVE': 5, # DM
'FLAG_DOMAIN_DISALLOW_RENAME': 4, # DR
'FLAG_CONFIG_ALLOW_LIMITED_MOVE': 3, # AL
'FLAG_CONFIG_ALLOW_MOVE': 2, # AM
'FLAG_CONFIG_ALLOW_RENAME': 1, # AR
'FLAG_DISALLOW_DELETE': 0 # DD
}
# ADTS: 2.2.11
bitFields["schemaflagsex"] = {
'FLAG_ATTR_IS_CRITICAL': 31
}
# ADTS: 3.1.1.2.2.2
oMObjectClassBER = {
'1.3.12.2.1011.28.0.702' : base64.b64encode('\x2B\x0C\x02\x87\x73\x1C\x00\x85\x3E'),
'1.2.840.113556.1.1.1.12': base64.b64encode('\x2A\x86\x48\x86\xF7\x14\x01\x01\x01\x0C'),
'2.6.6.1.2.5.11.29' : base64.b64encode('\x56\x06\x01\x02\x05\x0B\x1D'),
'1.2.840.113556.1.1.1.11': base64.b64encode('\x2A\x86\x48\x86\xF7\x14\x01\x01\x01\x0B'),
'1.3.12.2.1011.28.0.714' : base64.b64encode('\x2B\x0C\x02\x87\x73\x1C\x00\x85\x4A'),
'1.3.12.2.1011.28.0.732' : base64.b64encode('\x2B\x0C\x02\x87\x73\x1C\x00\x85\x5C'),
'1.2.840.113556.1.1.1.6' : base64.b64encode('\x2A\x86\x48\x86\xF7\x14\x01\x01\x01\x06')
}
# separated by commas in docs, and must be broken up
multivalued_attrs = set(["auxiliaryclass","maycontain","mustcontain","posssuperiors",
"systemauxiliaryclass","systemmaycontain","systemmustcontain",
"systemposssuperiors"])
def __read_folded_line(f, buffer):
""" reads a line from an LDIF file, unfolding it"""
line = buffer
while True:
l = f.readline()
if l[:1] == " ":
# continued line
# cannot fold an empty line
assert(line != "" and line != "\n")
# preserves '\n '
line = line + l
else:
# non-continued line
if line == "":
line = l
if l == "":
# eof, definitely won't be folded
break
else:
# marks end of a folded line
# line contains the now unfolded line
# buffer contains the start of the next possibly folded line
buffer = l
break
return (line, buffer)
def __read_raw_entries(f):
"""reads an LDIF entry, only unfolding lines"""
# will not match options after the attribute type
attr_type_re = re.compile("^([A-Za-z]+[A-Za-z0-9-]*):")
buffer = ""
while True:
entry = []
while True:
(l, buffer) = __read_folded_line(f, buffer)
if l[:1] == "#":
continue
if l == "\n" or l == "":
break
m = attr_type_re.match(l)
if m:
if l[-1:] == "\n":
l = l[:-1]
entry.append(l)
else:
print >>sys.stderr, "Invalid line: %s" % l,
sys.exit(1)
if len(entry):
yield entry
if l == "":
break
def fix_dn(dn):
"""fix a string DN to use ${SCHEMADN}"""
# folding?
if dn.find("<RootDomainDN>") != -1:
dn = dn.replace("\n ", "")
dn = dn.replace(" ", "")
return dn.replace("CN=Schema,CN=Configuration,<RootDomainDN>", "${SCHEMADN}")
else:
return dn
def __convert_bitfield(key, value):
"""Evaluate the OR expression in 'value'"""
assert(isinstance(value, str))
value = value.replace("\n ", "")
value = value.replace(" ", "")
try:
# some attributes already have numeric values
o = int(value)
except ValueError:
o = 0
flags = value.split("|")
for f in flags:
bitpos = bitFields[key][f]
o = o | (1 << (31 - bitpos))
return str(o)
def __write_ldif_one(entry):
"""Write out entry as LDIF"""
out = []
for l in entry:
if isinstance(l[1], str):
vl = [l[1]]
else:
vl = l[1]
if l[0].lower() == 'omobjectclass':
out.append("%s:: %s" % (l[0], l[1]))
continue
for v in vl:
out.append("%s: %s" % (l[0], v))
return "\n".join(out)
def __transform_entry(entry, objectClass):
"""Perform transformations required to convert the LDIF-like schema
file entries to LDIF, including Samba-specific stuff."""
entry = [l.split(":", 1) for l in entry]
cn = ""
for l in entry:
key = l[0].lower()
l[1] = l[1].lstrip()
l[1] = l[1].rstrip()
if not cn and key == "cn":
cn = l[1]
if key in multivalued_attrs:
# unlike LDIF, these are comma-separated
l[1] = l[1].replace("\n ", "")
l[1] = l[1].replace(" ", "")
l[1] = l[1].split(",")
if key in bitFields:
l[1] = __convert_bitfield(key, l[1])
if key == "omobjectclass":
l[1] = oMObjectClassBER[l[1].strip()]
if isinstance(l[1], str):
l[1] = fix_dn(l[1])
assert(cn)
entry.insert(0, ["dn", "CN=%s,${SCHEMADN}" % cn])
entry.insert(1, ["objectClass", ["top", objectClass]])
for l in entry:
key = l[0].lower()
if key == "cn":
entry.remove(l)
return entry
def __parse_schema_file(filename, objectClass):
"""Load and transform a schema file."""
out = []
f = open(filename, "rU")
for entry in __read_raw_entries(f):
out.append(__write_ldif_one(__transform_entry(entry, objectClass)))
return "\n\n".join(out)
def read_ms_schema(attr_file, classes_file, dump_attributes = True, dump_classes = True, debug = False):
"""Read WSPP documentation-derived schema files."""
attr_ldif = ""
classes_ldif = ""
if dump_attributes:
attr_ldif = __parse_schema_file(attr_file, "attributeSchema")
if dump_classes:
classes_ldif = __parse_schema_file(classes_file, "classSchema")
return attr_ldif + "\n\n" + classes_ldif + "\n\n"
if __name__ == '__main__':
import sys
try:
attr_file = sys.argv[1]
classes_file = sys.argv[2]
except IndexError:
print >>sys.stderr, "Usage: %s attr-file.txt classes-file.txt" % (sys.argv[0])
sys.exit(1)
print read_ms_schema(attr_file, classes_file)
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