609 lines
18 KiB
Python
609 lines
18 KiB
Python
"""
|
|
ldif - generate and parse LDIF data (see RFC 2849)
|
|
|
|
See http://www.python-ldap.org/ for details.
|
|
|
|
$Id: ldif.py,v 1.90 2016/01/18 15:16:29 stroeder Exp $
|
|
|
|
Python compability note:
|
|
Tested with Python 2.0+, but should work with Python 1.5.2+.
|
|
"""
|
|
|
|
__version__ = '2.4.25'
|
|
|
|
__all__ = [
|
|
# constants
|
|
'ldif_pattern',
|
|
# functions
|
|
'CreateLDIF','ParseLDIF',
|
|
# classes
|
|
'LDIFWriter',
|
|
'LDIFParser',
|
|
'LDIFRecordList',
|
|
'LDIFCopy',
|
|
]
|
|
|
|
import urllib
|
|
import base64
|
|
import re
|
|
import types
|
|
import sys
|
|
|
|
try:
|
|
from cStringIO import StringIO
|
|
except ImportError:
|
|
try:
|
|
from StringIO import StringIO
|
|
except ImportError:
|
|
from io import StringIO
|
|
|
|
from ldap.compat import urlparse
|
|
|
|
attrtype_pattern = r'[\w;.-]+(;[\w_-]+)*'
|
|
attrvalue_pattern = r'(([^,]|\\,)+|".*?")'
|
|
attrtypeandvalue_pattern = attrtype_pattern + r'[ ]*=[ ]*' + attrvalue_pattern
|
|
rdn_pattern = attrtypeandvalue_pattern + r'([ ]*\+[ ]*' + attrtypeandvalue_pattern + r')*[ ]*'
|
|
dn_pattern = rdn_pattern + r'([ ]*,[ ]*' + rdn_pattern + r')*[ ]*'
|
|
dn_regex = re.compile('^%s$' % dn_pattern)
|
|
|
|
ldif_pattern = '^((dn(:|::) %(dn_pattern)s)|(%(attrtype_pattern)s(:|::) .*)$)+' % vars()
|
|
|
|
MOD_OP_INTEGER = {
|
|
'add' :0, # ldap.MOD_REPLACE
|
|
'delete' :1, # ldap.MOD_DELETE
|
|
'replace':2, # ldap.MOD_REPLACE
|
|
}
|
|
|
|
MOD_OP_STR = {
|
|
0:'add',1:'delete',2:'replace'
|
|
}
|
|
|
|
CHANGE_TYPES = ['add','delete','modify','modrdn']
|
|
valid_changetype_dict = {}
|
|
for c in CHANGE_TYPES:
|
|
valid_changetype_dict[c]=None
|
|
|
|
|
|
def is_dn(s):
|
|
"""
|
|
returns 1 if s is a LDAP DN
|
|
"""
|
|
if s=='':
|
|
return 1
|
|
rm = dn_regex.match(s)
|
|
return rm!=None and rm.group(0)==s
|
|
|
|
|
|
SAFE_STRING_PATTERN = b'(^(\000|\n|\r| |:|<)|[\000\n\r\200-\377]+|[ ]+$)'
|
|
safe_string_re = re.compile(SAFE_STRING_PATTERN)
|
|
|
|
def list_dict(l):
|
|
"""
|
|
return a dictionary with all items of l being the keys of the dictionary
|
|
"""
|
|
return dict([(i,None) for i in l])
|
|
|
|
|
|
class LDIFWriter:
|
|
"""
|
|
Write LDIF entry or change records to file object
|
|
Copy LDIF input to a file output object containing all data retrieved
|
|
via URLs
|
|
"""
|
|
|
|
def __init__(self,output_file,base64_attrs=None,cols=76,line_sep='\n'):
|
|
"""
|
|
output_file
|
|
file object for output
|
|
base64_attrs
|
|
list of attribute types to be base64-encoded in any case
|
|
cols
|
|
Specifies how many columns a line may have before it's
|
|
folded into many lines.
|
|
line_sep
|
|
String used as line separator
|
|
"""
|
|
self._output_file = output_file
|
|
self._base64_attrs = list_dict([a.lower() for a in (base64_attrs or [])])
|
|
self._cols = cols
|
|
self._line_sep = line_sep
|
|
self.records_written = 0
|
|
|
|
def _unfold_lines(self,line):
|
|
"""
|
|
Write string line as one or more folded lines
|
|
"""
|
|
# Check maximum line length
|
|
line_len = len(line)
|
|
if line_len<=self._cols:
|
|
self._output_file.write(line)
|
|
self._output_file.write(self._line_sep)
|
|
else:
|
|
# Fold line
|
|
pos = self._cols
|
|
self._output_file.write(line[0:min(line_len,self._cols)])
|
|
self._output_file.write(self._line_sep)
|
|
while pos<line_len:
|
|
self._output_file.write(' ')
|
|
self._output_file.write(line[pos:min(line_len,pos+self._cols-1)])
|
|
self._output_file.write(self._line_sep)
|
|
pos = pos+self._cols-1
|
|
return # _unfold_lines()
|
|
|
|
def _needs_base64_encoding(self,attr_type,attr_value):
|
|
"""
|
|
returns 1 if attr_value has to be base-64 encoded because
|
|
of special chars or because attr_type is in self._base64_attrs
|
|
"""
|
|
return attr_type.lower() in self._base64_attrs or \
|
|
not safe_string_re.search(attr_value) is None
|
|
|
|
def _unparseAttrTypeandValue(self,attr_type,attr_value):
|
|
"""
|
|
Write a single attribute type/value pair
|
|
|
|
attr_type
|
|
attribute type
|
|
attr_value
|
|
attribute value
|
|
"""
|
|
if self._needs_base64_encoding(attr_type,attr_value):
|
|
# Encode with base64
|
|
if not isinstance(attr_value, bytes):
|
|
attr_value = attr_value.encode('utf-8')
|
|
encoded = base64.encodestring(attr_value).decode('ascii')
|
|
encoded = encoded.replace('\n','')
|
|
self._unfold_lines(':: '.join([attr_type, encoded]))
|
|
else:
|
|
if isinstance(attr_value, bytes) and not isinstance(attr_value, str):
|
|
attr_value = attr_value.decode('utf-8')
|
|
self._unfold_lines(': '.join([attr_type, attr_value]))
|
|
return # _unparseAttrTypeandValue()
|
|
|
|
def _unparseEntryRecord(self,entry):
|
|
"""
|
|
entry
|
|
dictionary holding an entry
|
|
"""
|
|
attr_types = list(entry.keys())
|
|
attr_types.sort()
|
|
for attr_type in attr_types:
|
|
for attr_value in entry[attr_type]:
|
|
self._unparseAttrTypeandValue(attr_type,attr_value)
|
|
|
|
def _unparseChangeRecord(self,modlist):
|
|
"""
|
|
modlist
|
|
list of additions (2-tuple) or modifications (3-tuple)
|
|
"""
|
|
mod_len = len(modlist[0])
|
|
if mod_len==2:
|
|
changetype = 'add'
|
|
elif mod_len==3:
|
|
changetype = 'modify'
|
|
else:
|
|
raise ValueError("modlist item of wrong length: %d" % (mod_len))
|
|
self._unparseAttrTypeandValue('changetype',changetype)
|
|
for mod in modlist:
|
|
if mod_len==2:
|
|
mod_type,mod_vals = mod
|
|
elif mod_len==3:
|
|
mod_op,mod_type,mod_vals = mod
|
|
self._unparseAttrTypeandValue(MOD_OP_STR[mod_op],mod_type)
|
|
else:
|
|
raise ValueError("Subsequent modlist item of wrong length")
|
|
if mod_vals:
|
|
for mod_val in mod_vals:
|
|
self._unparseAttrTypeandValue(mod_type,mod_val)
|
|
if mod_len==3:
|
|
self._output_file.write('-'+self._line_sep)
|
|
|
|
def unparse(self,dn,record):
|
|
"""
|
|
dn
|
|
string-representation of distinguished name
|
|
record
|
|
Either a dictionary holding the LDAP entry {attrtype:record}
|
|
or a list with a modify list like for LDAPObject.modify().
|
|
"""
|
|
# Start with line containing the distinguished name
|
|
if not isinstance(dn, bytes):
|
|
dn = dn.encode('utf-8')
|
|
self._unparseAttrTypeandValue('dn', dn)
|
|
# Dispatch to record type specific writers
|
|
if isinstance(record, dict):
|
|
self._unparseEntryRecord(record)
|
|
elif isinstance(record, list):
|
|
self._unparseChangeRecord(record)
|
|
else:
|
|
raise ValueError('Argument record must be dictionary or list instead of %s' % (repr(record)))
|
|
# Write empty line separating the records
|
|
self._output_file.write(self._line_sep)
|
|
# Count records written
|
|
self.records_written = self.records_written+1
|
|
return # unparse()
|
|
|
|
|
|
def CreateLDIF(dn,record,base64_attrs=None,cols=76):
|
|
"""
|
|
Create LDIF single formatted record including trailing empty line.
|
|
This is a compability function. Use is deprecated!
|
|
|
|
dn
|
|
string-representation of distinguished name
|
|
record
|
|
Either a dictionary holding the LDAP entry {attrtype:record}
|
|
or a list with a modify list like for LDAPObject.modify().
|
|
base64_attrs
|
|
list of attribute types to be base64-encoded in any case
|
|
cols
|
|
Specifies how many columns a line may have before it's
|
|
folded into many lines.
|
|
"""
|
|
f = StringIO()
|
|
ldif_writer = LDIFWriter(f,base64_attrs,cols,'\n')
|
|
ldif_writer.unparse(dn,record)
|
|
s = f.getvalue()
|
|
f.close()
|
|
return s
|
|
|
|
|
|
class LDIFParser:
|
|
"""
|
|
Base class for a LDIF parser. Applications should sub-class this
|
|
class and override method handle() to implement something meaningful.
|
|
|
|
Public class attributes:
|
|
|
|
records_read
|
|
Counter for records processed so far
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
input_file,
|
|
ignored_attr_types=None,
|
|
max_entries=0,
|
|
process_url_schemes=None,
|
|
line_sep='\n'
|
|
):
|
|
"""
|
|
Parameters:
|
|
input_file
|
|
File-object to read the LDIF input from
|
|
ignored_attr_types
|
|
Attributes with these attribute type names will be ignored.
|
|
max_entries
|
|
If non-zero specifies the maximum number of entries to be
|
|
read from f.
|
|
process_url_schemes
|
|
List containing strings with URLs schemes to process with urllib.
|
|
An empty list turns off all URL processing and the attribute
|
|
is ignored completely.
|
|
line_sep
|
|
String used as line separator
|
|
"""
|
|
self._input_file = input_file
|
|
self._max_entries = max_entries
|
|
self._process_url_schemes = list_dict([s.lower() for s in (process_url_schemes or [])])
|
|
self._ignored_attr_types = list_dict([a.lower() for a in (ignored_attr_types or [])])
|
|
self._line_sep = line_sep
|
|
self.line_counter = 0
|
|
self.byte_counter = 0
|
|
self.records_read = 0
|
|
self._line = self._readline()
|
|
|
|
def handle(self,dn,entry):
|
|
"""
|
|
Process a single content LDIF record. This method should be
|
|
implemented by applications using LDIFParser.
|
|
"""
|
|
pass
|
|
|
|
def _readline(self):
|
|
s = self._input_file.readline()
|
|
self.line_counter = self.line_counter + 1
|
|
self.byte_counter = self.byte_counter + len(s)
|
|
if s[-2:]=='\r\n':
|
|
return s[:-2]
|
|
elif s[-1:]=='\n':
|
|
return s[:-1]
|
|
else:
|
|
return s
|
|
|
|
def _unfold_lines(self):
|
|
"""
|
|
Unfold several folded lines with trailing space into one line
|
|
"""
|
|
unfolded_lines = [ self._line ]
|
|
self._line = self._readline()
|
|
while self._line and self._line[0]==' ':
|
|
unfolded_lines.append(self._line[1:])
|
|
self._line = self._readline()
|
|
return ''.join(unfolded_lines)
|
|
|
|
def _next_key_and_value(self):
|
|
"""
|
|
Parse a single attribute type and value pair from one or
|
|
more lines of LDIF data
|
|
"""
|
|
# Reading new attribute line
|
|
unfolded_line = self._unfold_lines()
|
|
# Ignore comments which can also be folded
|
|
while unfolded_line and unfolded_line[0]=='#':
|
|
unfolded_line = self._unfold_lines()
|
|
if not unfolded_line:
|
|
return None,None
|
|
if unfolded_line=='-':
|
|
return '-',None
|
|
colon_pos = unfolded_line.index(':')
|
|
attr_type = unfolded_line[0:colon_pos]
|
|
# if needed attribute value is BASE64 decoded
|
|
value_spec = unfolded_line[colon_pos:colon_pos+2]
|
|
if value_spec==': ':
|
|
attr_value = unfolded_line[colon_pos+2:].lstrip()
|
|
if not isinstance(unfolded_line, bytes):
|
|
attr_value = attr_value.encode('utf-8')
|
|
elif value_spec=='::':
|
|
# attribute value needs base64-decoding
|
|
attr_value = unfolded_line[colon_pos+2:]
|
|
if not isinstance(attr_value, bytes):
|
|
attr_value = attr_value.encode('ascii')
|
|
attr_value = base64.decodestring(attr_value)
|
|
elif value_spec==':<':
|
|
# fetch attribute value from URL
|
|
url = unfolded_line[colon_pos+2:].strip()
|
|
attr_value = None
|
|
if self._process_url_schemes:
|
|
u = urlparse(url)
|
|
if u[0] in self._process_url_schemes:
|
|
attr_value = urllib.urlopen(url).read()
|
|
else:
|
|
attr_value = unfolded_line[colon_pos+1:].encode('utf-8')
|
|
return attr_type,attr_value
|
|
|
|
def parse_entry_records(self):
|
|
"""
|
|
Continously read and parse LDIF entry records
|
|
"""
|
|
k,v = self._next_key_and_value()
|
|
if k=='version':
|
|
self.version = v
|
|
k,v = self._next_key_and_value()
|
|
if k==v==None:
|
|
k,v = self._next_key_and_value()
|
|
else:
|
|
self.version = None
|
|
|
|
# Loop for processing whole records
|
|
while k!=None and \
|
|
(not self._max_entries or self.records_read<self._max_entries):
|
|
# Consume first line which must start with "dn: "
|
|
if k!='dn':
|
|
raise ValueError('Line %d: First line of record does not start with "dn:": %s' % (self.line_counter,repr(k)))
|
|
if isinstance(v, bytes):
|
|
v = v.decode('utf-8')
|
|
if not is_dn(v):
|
|
raise ValueError('Line %d: Not a valid string-representation for dn: %s.' % (self.line_counter,repr(v)))
|
|
dn = v
|
|
entry = {}
|
|
# Consume second line of record
|
|
k,v = self._next_key_and_value()
|
|
|
|
# Loop for reading the attributes
|
|
while k!=None and \
|
|
not k.lower() in self._ignored_attr_types:
|
|
# Add the attribute to the entry if not ignored attribute
|
|
try:
|
|
entry[k].append(v)
|
|
except KeyError:
|
|
entry[k]=[v]
|
|
# Read the next line within the record
|
|
k,v = self._next_key_and_value()
|
|
# Consume empty separator line
|
|
k,v = self._next_key_and_value()
|
|
if entry:
|
|
# append entry to result list
|
|
self.handle(dn,entry)
|
|
self.records_read = self.records_read + 1
|
|
|
|
return # parse_entry_records()
|
|
|
|
def parse(self):
|
|
"""
|
|
Invokes LDIFParser.parse_entry_records() for backward compability
|
|
"""
|
|
return self.parse_entry_records() # parse()
|
|
|
|
def handle_modify(self,dn,modops,controls=None):
|
|
"""
|
|
Process a single LDIF record representing a single modify operation.
|
|
This method should be implemented by applications using LDIFParser.
|
|
"""
|
|
controls = [] or None
|
|
pass
|
|
|
|
def parse_change_records(self):
|
|
self.changetype_counter = {}
|
|
k,v = self._next_key_and_value()
|
|
if k=='version':
|
|
self.version = v
|
|
k,v = self._next_key_and_value()
|
|
if k==v==None:
|
|
k,v = self._next_key_and_value()
|
|
else:
|
|
self.version = None
|
|
|
|
# Loop for processing whole records
|
|
while k!=None and \
|
|
(not self._max_entries or self.records_read<self._max_entries):
|
|
|
|
# Consume first line which must start with "dn: "
|
|
if k!='dn':
|
|
raise ValueError('Line %d: First line of record does not start with "dn:": %s' % (self.line_counter,repr(k)))
|
|
if not is_dn(v):
|
|
raise ValueError('Line %d: Not a valid string-representation for dn: %s' % (self.line_counter,repr(v)))
|
|
dn = v
|
|
# Read "control:" lines
|
|
controls = []
|
|
k,v = self._next_key_and_value()
|
|
while k=='control':
|
|
try:
|
|
control_type,criticality,control_value = v.split(' ',2)
|
|
except ValueError:
|
|
control_value = None
|
|
control_type,criticality = v.split(' ',1)
|
|
controls.append((control_type,criticality,control_value))
|
|
k,v = self._next_key_and_value()
|
|
# Determine changetype first, assuming changetype: as default
|
|
changetype = 'modify'
|
|
# Consume second line of record
|
|
if k=='changetype':
|
|
if not v in valid_changetype_dict:
|
|
raise ValueError('Invalid changetype: %s' % repr(v))
|
|
changetype = v
|
|
k,v = self._next_key_and_value()
|
|
if isinstance(v, bytes):
|
|
v = v.decode('ascii')
|
|
|
|
if changetype=='modify':
|
|
|
|
# From here we assume a change record is read with changetype: modify
|
|
modops = []
|
|
|
|
# Loop for reading the list of modifications
|
|
while k!=None:
|
|
# Extract attribute mod-operation (add, delete, replace)
|
|
try:
|
|
modop = MOD_OP_INTEGER[k]
|
|
except KeyError:
|
|
raise ValueError('Line %d: Invalid mod-op string: %s' % (self.line_counter,repr(k)))
|
|
# we now have the attribute name to be modified
|
|
modattr = v
|
|
modvalues = []
|
|
k,v = self._next_key_and_value()
|
|
while k==modattr:
|
|
modvalues.append(v)
|
|
k,v = self._next_key_and_value()
|
|
modops.append((modop,modattr,modvalues or None))
|
|
k,v = self._next_key_and_value()
|
|
if k=='-':
|
|
# Consume next line
|
|
k,v = self._next_key_and_value()
|
|
|
|
if modops:
|
|
# append entry to result list
|
|
self.handle_modify(dn,modops,controls)
|
|
|
|
else:
|
|
|
|
# Consume the unhandled change record
|
|
while k!=None:
|
|
k,v = self._next_key_and_value()
|
|
|
|
# Consume empty separation line
|
|
k,v = self._next_key_and_value()
|
|
|
|
# Increment record counters
|
|
try:
|
|
self.changetype_counter[changetype] = self.changetype_counter[changetype] + 1
|
|
except KeyError:
|
|
self.changetype_counter[changetype] = 1
|
|
self.records_read = self.records_read + 1
|
|
|
|
return # parse_change_records()
|
|
|
|
|
|
class LDIFRecordList(LDIFParser):
|
|
"""
|
|
Collect all records of LDIF input into a single list.
|
|
of 2-tuples (dn,entry). It can be a memory hog!
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
input_file,
|
|
ignored_attr_types=None,max_entries=0,process_url_schemes=None
|
|
):
|
|
"""
|
|
See LDIFParser.__init__()
|
|
|
|
Additional Parameters:
|
|
all_records
|
|
List instance for storing parsed records
|
|
"""
|
|
LDIFParser.__init__(self,input_file,ignored_attr_types,max_entries,process_url_schemes)
|
|
self.all_records = []
|
|
self.all_modify_changes = []
|
|
|
|
def handle(self,dn,entry):
|
|
"""
|
|
Append single record to dictionary of all records.
|
|
"""
|
|
self.all_records.append((dn,entry))
|
|
|
|
def handle_modify(self,dn,modops,controls=None):
|
|
"""
|
|
Process a single LDIF record representing a single modify operation.
|
|
This method should be implemented by applications using LDIFParser.
|
|
"""
|
|
controls = [] or None
|
|
self.all_modify_changes.append((dn,modops,controls))
|
|
|
|
|
|
class LDIFCopy(LDIFParser):
|
|
"""
|
|
Copy LDIF input to LDIF output containing all data retrieved
|
|
via URLs
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
input_file,output_file,
|
|
ignored_attr_types=None,max_entries=0,process_url_schemes=None,
|
|
base64_attrs=None,cols=76,line_sep='\n'
|
|
):
|
|
"""
|
|
See LDIFParser.__init__() and LDIFWriter.__init__()
|
|
"""
|
|
LDIFParser.__init__(self,input_file,ignored_attr_types,max_entries,process_url_schemes)
|
|
self._output_ldif = LDIFWriter(output_file,base64_attrs,cols,line_sep)
|
|
|
|
def handle(self,dn,entry):
|
|
"""
|
|
Write single LDIF record to output file.
|
|
"""
|
|
self._output_ldif.unparse(dn,entry)
|
|
|
|
|
|
def ParseLDIF(f,ignore_attrs=None,maxentries=0):
|
|
"""
|
|
Parse LDIF records read from file.
|
|
This is a compability function. Use is deprecated!
|
|
"""
|
|
ldif_parser = LDIFRecordList(
|
|
f,ignored_attr_types=ignore_attrs,max_entries=maxentries,process_url_schemes=0
|
|
)
|
|
ldif_parser.parse()
|
|
return ldif_parser.all_records
|
|
|
|
|
|
if __name__ == '__main__':
|
|
import sys,os,time,pprint
|
|
parser_class_name = sys.argv[1]
|
|
parser_class = vars()[parser_class_name]
|
|
parser_method_name = sys.argv[2]
|
|
for input_file_name in sys.argv[3:]:
|
|
input_file_size = os.stat(input_file_name).st_size
|
|
input_file = open(input_file_name,'rb')
|
|
ldif_parser = parser_class(input_file)
|
|
parser_method = getattr(ldif_parser,parser_method_name)
|
|
start_time = time.time()
|
|
parser_method()
|
|
end_time = time.time()
|
|
input_file.close()
|
|
print('***Time needed:',end_time-start_time,'seconds')
|
|
print('***Records read:',ldif_parser.records_read)
|
|
print('***Lines read:',ldif_parser.line_counter)
|
|
print('***Bytes read:',ldif_parser.byte_counter,'of',input_file_size)
|