fix table outputs (join multiple values with separator again), use separate method for (simple) json

README.md

@@ -9,7 +9,7 @@ CLI tool to query LDAP/AD servers
   * Integration with password managers
 * Various output formats
   * Classic LDIF
-  * JSON stream (with detailed or simplified attribute values)
+  * JSON stream (with simplified or detailed attribute values)
   * CSV
   * Markdown table with stretched columns (for viewing in CLI/for monospaces fonts); requires csvlook from [csvkit](https://csvkit.readthedocs.io/)
   * HTML
@@ -18,6 +18,34 @@ CLI tool to query LDAP/AD servers
   * By default the first 1000 entries are shown, and it errors if there are more results
   * Use `--all` to show all results
 
+## Virtual attributes
+
+`ldaptool` supports constructing new values from existing attributes by adding a `:<postprocess>` suffix (which can be chained apart from the length limit).
+
+* Some suffixes support an argument as `:<postprocess>[<arg>]`.
+* A single integer as postprocess suffix limits the length of the value; it replaces the last character of the output with `…` if it cut something off.
+* Multi-valued attributes generate multiple virtual attrites; each value is processed individually. (The values are joined afterwards for table output if needed.)
+
+### DN handling
+
+DNs are decoded into lists of lists of `(name, value)` pairs (the inner list usually contains exactly one entry).
+Attributes with a `DC` name are considered part of the "domain", everything else belongs to the "path".
+(Usually a DN will start with path segments and end with domain segments.)
+The path is read from back to front.
+
+The following postprocess hooks are available:
+* `domain`: extracts the domain as DNS FQDN (`CN=Someone,OU=Dep1,DC=example,DC=com` becomes `example.com`)
+* `path`: extracts the non-domain parts without names and separates them by `/` (`CN=Someone,OU=Dep1,DC=example,DC=com` becomes `Dep1/Someone`)
+* `fullpath`: uses the `domain` as first segment in a path (`CN=Someone,OU=Dep1,DC=example,DC=com` becomes `example.com/Dep1/Someone`)
+* `dnslice`: extracts a "slice" from a DN (outer list only); the result is still in DN format.
+
+`path`, `fullpath` and `dnslice` take an optional index/slice as argument, written in python syntax.
+For `path` and `fullpath` this extracts only the given index/slice from the path (`fullpath` always includes the full FQDN as first segment), `dnslice` operates on the outer list of decoded (lists of) pairs:
+
+* `dn:dnslice[1:]` on `dn: CN=Someone,OU=Dep1,DC=example,DC=com` returns `OU=Dep1,DC=example,DC=com`
+* `dn:fullpath[:-1]` on `dn: CN=Someone,OU=Dep1,DC=example,DC=com` returns `example.com/Dep1`
+* `dn:path[-1]` on `dn: CN=Someone,OU=Dep1,DC=example,DC=com` returns `Someone`
+
 ## Authentication, Protocol, Ports
 
 `ldaptool` always uses TLS for password based authentication, and SASL GSS-API over non-TLS for Kerberos ones.

pyproject.toml

@@ -16,7 +16,7 @@ classifiers = [
 ]
 dynamic = ["version", "description"]
 
-requires-python = "~=3.11"
+requires-python = "~=3.10"
 dependencies = [
     "python-ldap",
     "PyYAML",

src/ldaptool/_main.py

@@ -14,7 +14,7 @@ from ldaptool._utils import argclasses
 from ldaptool._utils.ldap import Result, SizeLimitExceeded
 
 
-class TableOutput(enum.StrEnum):
+class TableOutput(enum.Enum):
     MARKDOWN = "markdown"
     CSV = "csv"
     HTML = "html"
@@ -42,19 +42,31 @@ class Arguments(search.Arguments):
             help="Markdown table output - requires list of attributes",
         ),
     )
-    table_output: typing.Optional[TableOutput] = None
     html: bool = dataclasses.field(
         default=False,
         metadata=argclasses.arg(
             help="HTML table output - requires list of attributes",
         ),
     )
+    table_output: typing.Optional[TableOutput] = None
     sort: bool = dataclasses.field(
         default=False,
         metadata=argclasses.arg(
             help="Sorted table output - defaults to markdown --table unless --csv is given",
         ),
     )
+    full_json: bool = dataclasses.field(
+        default=False,
+        metadata=argclasses.arg(
+            help="Use full json output (dn as str, attributes as list of dicts containing various represenatations)",
+        ),
+    )
+    json: bool = dataclasses.field(
+        default=False,
+        metadata=argclasses.arg(
+            help="Use simple json output (dn as str, attributes map to list of human-readable strings)",
+        ),
+    )
 
     def __post_init__(self) -> None:
         super(Arguments, self).__post_init__()  # super() not working here, unclear why.
@@ -77,15 +89,15 @@ class Arguments(search.Arguments):
         if self.table_output:
             if not self.columns:
                 raise SystemExit("Table output requires attributes")
-            if self.json:
+            if self.full_json:
                 raise SystemExit("Can't use both table output and --json")
-            if self.human:
+            if self.json:
                 raise SystemExit("Can't use both table output and --human")
 
         if self.raw:
             if self.table_output:
                 raise SystemExit("Table output requires decode; --raw not allowed")
-            if self.json or self.human:
+            if self.full_json or self.json:
                 raise SystemExit("Decode options require decode; --raw not allowed")
 
 
@@ -97,8 +109,11 @@ class _Context:
         try:
             self.config = search.Config.load()
         except Exception as e:
-            raise SystemExit(f"config error: {e}")
-        self.arguments = arguments_p.from_args(args)
+            raise SystemExit(f"config error: {e!r}")
+        try:
+            self.arguments = arguments_p.from_args(args)
+        except decode.InvalidStep as e:
+            raise SystemExit(f"invalid arguments: {e}")
 
     def run(self) -> None:
         # starting the search sets the base we want to print
@@ -141,7 +156,7 @@ class _Context:
                     continue
                 # normal entry
                 assert not isinstance(entry, list)
-                obj = decoder.human(dn=dn, entry=decoder.read(dn=dn, entry=entry))
+                obj = decoder.human(dn=dn, obj=decoder.read(dn=dn, entry=entry))
                 yield tuple(obj.get(key, "") for key in column_keys)
         except SizeLimitExceeded as e:
             raise SystemExit(f"Error: {e}")
@@ -172,7 +187,7 @@ class _Context:
         num_responses = 0
         num_entries = 0
 
-        ldif_output = not (self.arguments.json or self.arguments.human)
+        ldif_output = not (self.arguments.full_json or self.arguments.json)
 
         if ldif_output:
             print("# extended LDIF")
@@ -201,8 +216,13 @@ class _Context:
                 # normal entry
                 assert not isinstance(entry, list)
                 num_entries += 1
-                obj = decoder.read(dn=dn, entry=entry)
-                decoder.emit(dn=dn, entry=obj)
+                if ldif_output:
+                    decoder.read_and_emit_ldif(dn=dn, entry=entry, file=stream)
+                elif self.arguments.json:
+                    decoder.read_and_emit_simple_json(dn=dn, entry=entry, file=stream)
+                else:
+                    assert self.arguments.full_json
+                    decoder.read_and_emit_full_json(dn=dn, entry=entry, file=stream)
         except SizeLimitExceeded as e:
             raise SystemExit(f"Error: {e}")
 

src/ldaptool/_utils/argclasses.py

@@ -74,6 +74,9 @@ _TArgs = typing.TypeVar("_TArgs", bound="BaseArguments")
 
 @dataclasses.dataclass(slots=True, kw_only=True)
 class BaseArguments:
+    def __post_init__(self) -> None:
+        pass
+
     @classmethod
     def add_fields_to_parser(
         cls: type[_TArgs],

src/ldaptool/_utils/dninfo.py

@@ -33,19 +33,26 @@ class DNInfo:
     def domain(self) -> str:
         return ".".join(ava[1] for rdn in self.parts for ava in rdn if ava[0].lower() == "dc")
 
-    def _path(self, *, escape: typing.Callable[[str], str], sep: str) -> str:
-        return sep.join(escape(ava[1]) for rdn in reversed(self.parts) for ava in rdn if ava[0].lower() != "dc")
+    def _path(self, *, escape: typing.Callable[[str], str], sep: str, selection: slice = slice(None)) -> str:
+        rev_flattened = [ava[1] for rdn in reversed(self.parts) for ava in rdn if ava[0].lower() != "dc"]
+        return sep.join(value for value in rev_flattened[selection])
+
+    def sliced_path(self, selection: slice, /) -> str:
+        return self._path(escape=lambda value: _escape_backslash(value, special="/"), sep="/", selection=selection)
 
     @functools.cached_property
     def path(self) -> str:
-        return self._path(escape=lambda value: _escape_backslash(value, special="/"), sep="/")
+        return self.sliced_path(slice(None))
 
-    @property
-    def full_path(self) -> str:
+    def sliced_full_path(self, selection: slice, /) -> str:
         domain = self.domain
-        path = self.path
+        path = self.sliced_path(selection)
         if not path:
             return self.domain
         if not domain:
             return self.path
         return f"{domain}/{path}"
+
+    @property
+    def full_path(self) -> str:
+        return self.sliced_full_path(slice(None))

src/ldaptool/decode/__init__.py

@@ -1,10 +1,12 @@
 from __future__ import annotations
 
 from ._decoder import Attribute, Decoder
+from ._postprocess import InvalidStep
 from .arguments import Arguments
 
 __all__ = [
     "Arguments",
     "Attribute",
     "Decoder",
+    "InvalidStep",
 ]

src/ldaptool/decode/_decoder.py

@@ -8,8 +8,6 @@ import sys
 import typing
 import uuid
 
-from ldaptool._utils.dninfo import DNInfo
-
 from . import _types
 from .arguments import Arguments
 
@@ -102,8 +100,15 @@ class Attribute:
             except Exception:
                 return
 
+    def _try_decode_grouptype(self) -> None:
+        if self.utf8_clean:
+            try:
+                self.decoded = _types.grouptype.parse(self.utf8_clean.strip())
+            except Exception:
+                return
+
     def _try_decode(self, args: Arguments) -> None:
-        if self.name in ("objectSid",):
+        if self.name in ("objectSid", "securityIdentifier"):
             self._try_decode_sid()
         elif self.name in ("msExchMailboxGuid", "objectGUID"):
             self._try_decode_uuid()
@@ -117,21 +122,23 @@ class Attribute:
             self._try_decode_timestamp(args)
         elif self.name == "userAccountControl":
             self._try_decode_uac()
+        elif self.name == "groupType":
+            self._try_decode_grouptype()
 
     @property
     def _base64_value(self) -> str:
         return base64.b64encode(self.raw).decode("ascii")
 
-    def print(self) -> None:
+    def print(self, *, file: typing.IO[str] = sys.stdout) -> None:
         if not self.decoded is None:
             comment = self.utf8_clean
             if comment is None:
                 comment = self._base64_value
-            print(f"{self.name}: {self.decoded}  # {comment}")
+            print(f"{self.name}: {self.decoded}  # {comment}", file=file)
         elif not self.utf8_clean is None:
-            print(f"{self.name}: {self.utf8_clean}")
+            print(f"{self.name}: {self.utf8_clean}", file=file)
         else:
-            print(f"{self.name}:: {self._base64_value}")
+            print(f"{self.name}:: {self._base64_value}", file=file)
 
     def to_json(self) -> dict[str, typing.Any]:
         item: dict[str, typing.Any] = {}
@@ -175,55 +182,75 @@ class Decoder:
             name.lower(): [Attribute(name=name, raw=raw, arguments=self.arguments) for raw in raw_values]
             for name, raw_values in entry.items()
         }
-        if self.arguments.dndomain or self.arguments.dnpath or self.arguments.dnfullpath:
-            dninfo = DNInfo(dn=dn)
-            if self.arguments.dndomain:
-                decoded_entry["dndomain"] = [
-                    Attribute.fake_attribute("dndomain", dninfo.domain),
-                ]
-            if self.arguments.dnpath:
-                decoded_entry["dnpath"] = [
-                    Attribute.fake_attribute("dnpath", dninfo.path),
-                ]
-            if self.arguments.dnfullpath:
-                decoded_entry["dnfullpath"] = [
-                    Attribute.fake_attribute("dnfullpath", dninfo.full_path),
+
+        for attr, post_processes in self.arguments.post_process.items():
+            if attr == "dn":
+                values = [dn]
+            else:
+                attrs = decoded_entry.get(attr, None)
+                if attrs is None:
+                    continue
+                values = [at.human() for at in attrs]
+            for column, post_process in post_processes.items():
+                decoded_entry[column] = [
+                    Attribute.fake_attribute(column, post_process.process(value)) for value in values
                 ]
+
         return decoded_entry
 
-    def human(self, *, dn: str, entry: TDecoded) -> dict[str, str]:
+    def human(self, *, dn: str, obj: TDecoded) -> dict[str, str]:
         emit: dict[str, typing.Any] = dict(dn=dn)
-        for name, attrs in entry.items():
+        for name, attrs in obj.items():
             emit[name] = self.arguments.human_separator.join(attr.human() for attr in attrs)
         return emit
 
-    def json(self, *, dn: str, entry: TDecoded) -> dict[str, str]:
+    def simple_json(self, *, dn: str, obj: TDecoded) -> dict[str, str]:
         emit: dict[str, typing.Any] = dict(dn=dn)
-        for name, attrs in entry.items():
+        for name, attrs in obj.items():
+            emit[name] = [attr.human() for attr in attrs]
+        return emit
+
+    def emit_simple_json(self, *, dn: str, obj: TDecoded, file: typing.IO[str] = sys.stdout) -> None:
+        emit = self.simple_json(dn=dn, obj=obj)
+        json.dump(emit, file, ensure_ascii=False)
+        print(file=file)  # terminate output dicts by newline
+
+    def read_and_emit_simple_json(self, *, dn: str, entry: TEntry, file: typing.IO[str] = sys.stdout) -> None:
+        self.emit_simple_json(dn=dn, obj=self.read(dn=dn, entry=entry), file=file)
+
+    def full_json(self, *, dn: str, obj: TDecoded) -> dict[str, str]:
+        emit: dict[str, typing.Any] = dict(dn=dn)
+        for name, attrs in obj.items():
             emit[name] = [attr.to_json() for attr in attrs]
         return emit
 
-    def _emit_json(self, *, dn: str, entry: TDecoded) -> None:
-        if self.arguments.human:
-            emit = self.human(dn=dn, entry=entry)
+    def emit_full_json(self, *, dn: str, obj: TDecoded, file: typing.IO[str] = sys.stdout) -> None:
+        emit = self.full_json(dn=dn, obj=obj)
+        json.dump(emit, file, ensure_ascii=False)
+        print(file=file)  # terminate output dicts by newline
+
+    def read_and_emit_full_json(self, *, dn: str, entry: TEntry, file: typing.IO[str] = sys.stdout) -> None:
+        self.emit_full_json(dn=dn, obj=self.read(dn=dn, entry=entry), file=file)
+
+    def emit_ldif(self, *, dn: str, obj: TDecoded, file: typing.IO[str] = sys.stdout) -> None:
+        print(f"dn: {dn}", file=file)
+        attrs: typing.Optional[list[Attribute]]
+        if not self.arguments.attributes:
+            # show all attributes - use order from server
+            for attrs in obj.values():
+                for attr in attrs:
+                    attr.print(file=file)
         else:
-            emit = self.json(dn=dn, entry=entry)
-        json.dump(emit, sys.stdout, ensure_ascii=False)
-        print()  # terminate output dicts by newline
+            # only selected columns; use given order
+            for column in self.arguments.columns_keys:
+                if column == "dn":
+                    continue  # already printed dn
+                attrs = obj.get(column, None)
+                if attrs is None:
+                    continue
+                for attr in attrs:
+                    attr.print(file=file)
+        print(file=file)  # separate entries with newlines
 
-    def _emit_ldif(self, *, dn: str, entry: TDecoded) -> None:
-        print(f"dn: {dn}")
-        for attrs in entry.values():
-            for attr in attrs:
-                attr.print()
-        print()  # separate entries with newlines
-
-    def emit(self, *, dn: str, entry: TDecoded) -> None:
-        if self.arguments.human or self.arguments.json:
-            self._emit_json(dn=dn, entry=entry)
-        else:
-            self._emit_ldif(dn=dn, entry=entry)
-
-    def handle(self, *, dn: str, entry: TEntry) -> None:
-        entry_attrs = self.read(dn=dn, entry=entry)
-        self.emit(dn=dn, entry=entry_attrs)
+    def read_and_emit_ldif(self, *, dn: str, entry: TEntry, file: typing.IO[str] = sys.stdout) -> None:
+        self.emit_ldif(dn=dn, obj=self.read(dn=dn, entry=entry), file=file)

src/ldaptool/decode/_postprocess.py

@@ -0,0 +1,195 @@
+from __future__ import annotations
+
+import abc
+import dataclasses
+import typing
+
+import ldap.dn
+
+from ldaptool._utils.dninfo import DNInfo
+
+
+class Step(abc.ABC):
+    __slots__ = ()
+
+    @abc.abstractmethod
+    def step(self, value: str) -> str:
+        ...
+
+
+def _args_to_slice(args: str) -> slice:
+    args = args.strip()
+    if not args:
+        return slice(None)
+    params: list[typing.Optional[int]] = []
+    for arg in args.split(":"):
+        arg = arg.strip()
+        if arg:
+            params.append(int(arg))
+        else:
+            params.append(None)
+    if len(params) == 1:
+        assert isinstance(params[0], int)
+        ndx = params[0]
+        if ndx == -1:
+            return slice(ndx, None)  # from last element to end - still exactly one element
+        # this doesn't work for ndx == -1: slice(-1, 0) is always empty. otherwise it should return [ndx:][:1].
+        return slice(ndx, ndx + 1)
+    return slice(*params)
+
+
+@dataclasses.dataclass(slots=True)
+class MaxLength(Step):
+    limit: int
+
+    def step(self, value: str) -> str:
+        if not self.limit or len(value) <= self.limit:
+            return value
+        return value[: self.limit - 1] + "…"
+
+
+@dataclasses.dataclass(slots=True)
+class DNDomain(Step):
+    def __init__(self, args: str) -> None:
+        if args:
+            raise ValueError(":domain doesn't support an argument")
+
+    def step(self, value: str) -> str:
+        try:
+            dninfo = DNInfo(dn=value)
+        except Exception:
+            # not a valid DN -> no processing
+            return value
+        return dninfo.domain
+
+
+@dataclasses.dataclass(slots=True)
+class DNPath(Step):
+    path_slice: slice
+
+    def __init__(self, args: str) -> None:
+        self.path_slice = _args_to_slice(args)
+
+    def step(self, value: str) -> str:
+        try:
+            dninfo = DNInfo(dn=value)
+        except Exception:
+            # not a valid DN -> no processing
+            return value
+        return dninfo.sliced_path(self.path_slice)
+
+
+@dataclasses.dataclass(slots=True)
+class DNFullPath(Step):
+    path_slice: slice
+
+    def __init__(self, args: str) -> None:
+        self.path_slice = _args_to_slice(args)
+
+    def step(self, value: str) -> str:
+        try:
+            dninfo = DNInfo(dn=value)
+        except Exception:
+            # not a valid DN -> no processing
+            return value
+        return dninfo.sliced_full_path(self.path_slice)
+
+
+@dataclasses.dataclass(slots=True)
+class DNSlice(Step):
+    slice: slice
+
+    def __init__(self, args: str) -> None:
+        self.slice = _args_to_slice(args)
+
+    def step(self, value: str) -> str:
+        try:
+            dninfo = DNInfo(dn=value)
+        except Exception:
+            # not a valid DN -> no processing
+            return value
+        return ldap.dn.dn2str(dninfo.parts[self.slice])  # type: ignore
+
+
+_STEPS: dict[str, typing.Callable[[str], Step]] = {
+    "domain": DNDomain,
+    "path": DNPath,
+    "fullpath": DNFullPath,
+    "dnslice": DNSlice,
+}
+
+
+class InvalidStep(Exception):
+    pass
+
+
+@dataclasses.dataclass(slots=True)
+class PostProcess:
+    steps: list[Step]
+
+    def process(self, value: str) -> str:
+        for step in self.steps:
+            value = step.step(value)
+        return value
+
+
+def parse_steps(steps: str) -> PostProcess:
+    result: list[Step] = []
+
+    cur_id_start = 0
+    cur_args_start = -1
+    current_id = ""
+    current_args = ""
+    count_brackets = 0
+    step_done = False
+
+    def handle_step() -> None:
+        nonlocal cur_id_start, cur_args_start, current_id, current_args, step_done
+        assert step_done
+
+        step_i = _STEPS.get(current_id, None)
+        if step_i is None:
+            try:
+                max_len = int(current_id)
+                result.append(MaxLength(max_len))
+            except ValueError:
+                raise InvalidStep(f"Unknown post-processing step {current_id!r}")
+        else:
+            result.append(step_i(current_args))
+
+        cur_id_start = pos + 1
+        cur_args_start = -1
+        current_id = ""
+        current_args = ""
+        step_done = False
+
+    for pos, char in enumerate(steps):
+        if step_done:
+            if char != ":":
+                raise InvalidStep(f"Require : after step, found {char!r} at pos {pos}")
+            handle_step()
+        elif char == "[":
+            if count_brackets == 0:
+                # end of identifier
+                current_id = steps[cur_id_start:pos]
+                cur_args_start = pos + 1
+            count_brackets += 1
+        elif char == "]":
+            count_brackets -= 1
+            if count_brackets == 0:
+                current_args = steps[cur_args_start:pos]
+                step_done = True
+        elif count_brackets:
+            continue
+        elif not char.isalnum():
+            raise InvalidStep(f"Expecting either alphanumeric, ':' or '[', got {char!r} at {pos}")
+
+    if not step_done:
+        current_id = steps[cur_id_start:]
+        if current_id:
+            step_done = True
+
+    if step_done:
+        handle_step()
+
+    return PostProcess(result)

src/ldaptool/decode/_types/__init__.py

@@ -1,8 +1,9 @@
 from __future__ import annotations
 
-from . import sid, timestamp, uac
+from . import grouptype, sid, timestamp, uac
 
 __all__ = [
+    "grouptype",
     "sid",
     "timestamp",
     "uac",

src/ldaptool/decode/_types/grouptype.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+import enum
+import typing
+
+
+class GroupTypeFlags(enum.IntFlag):
+    SYSTEM = 0x00000001
+    SCOPE_GLOBAL = 0x00000002
+    SCOPE_DOMAIN = 0x00000004
+    SCOPE_UNIVERSAL = 0x00000008
+    APP_BASIC = 0x00000010
+    APP_QUERY = 0x00000020
+    SECURITY = 0x80000000  # otherwise distribution
+
+    def flags(self) -> list[GroupTypeFlags]:
+        # ignore "uncovered" bits for now
+        value = self.value
+        members = []
+        for member in GroupTypeFlags:
+            member_value = member.value
+            if member_value and member_value & value == member_value:
+                members.append(member)
+        return members
+
+
+def parse(value: str) -> str:
+    members = GroupTypeFlags(int(value)).flags()
+    return ", ".join(typing.cast(str, member.name) for member in members)

src/ldaptool/decode/arguments.py

@@ -1,47 +1,78 @@
 from __future__ import annotations
 
+import argparse
 import dataclasses
 
 from ldaptool._utils import argclasses
 
+from . import _postprocess
+
+
+def _parser_add_attributes(parser: argparse.ArgumentParser, dest: str) -> None:
+    parser.add_argument(
+        metavar="attributes",
+        dest=dest,
+        nargs="*",
+        help="""
+            Attributes to lookup (and columns to display in tables).
+            Fake attributes `dndomain`, `dnpath` an `dnfullpath` are available (created from dn).
+        """,
+    )
+
 
 @dataclasses.dataclass(slots=True, kw_only=True)
 class Arguments(argclasses.BaseArguments):
-    json: bool = dataclasses.field(
-        default=False,
-        metadata=argclasses.arg(help="Use full json output"),
-    )
-    human: bool = dataclasses.field(
-        default=False,
-        metadata=argclasses.arg(help="Use simple json output (join multiple values of one attribute)"),
-    )
+    columns: list[str] = dataclasses.field(default_factory=list, metadata=argclasses.manual(_parser_add_attributes))
+    columns_keys: list[str] = dataclasses.field(default_factory=list)  # lower case column names
+    attributes: list[str] = dataclasses.field(default_factory=list)
+
     human_separator: str = dataclasses.field(
         default=", ",
         metadata=argclasses.arg(help="Separator to join multiple values of one attribute with (default: %(default)r)"),
     )
+
     dateonly: bool = dataclasses.field(
         default=True,
         metadata=argclasses.arg(help="Use only date part of decoded timestamps"),
     )
-    dndomain: bool = dataclasses.field(
-        default=False,
-        metadata=argclasses.arg(help="Whether to export a virtual dndomain attribute (DNS domain from dn)"),
-    )
-    dnpath: bool = dataclasses.field(
-        default=False,
-        metadata=argclasses.arg(
-            help="""
-                Whether to export a virtual dnpath attribute
-                ('/' joined values of reversed DN without DNS labels)
-            """
-        ),
-    )
-    dnfullpath: bool = dataclasses.field(
-        default=False,
-        metadata=argclasses.arg(
-            help="""
-                Whether to export a virtual dnfullpath attribute
-                ('/' joined values of reversed DN; DNS domain as first label)
-            """
-        ),
-    )
+
+    post_process: dict[str, dict[str, _postprocess.PostProcess]] = dataclasses.field(default_factory=dict)
+
+    def __post_init__(self) -> None:
+        super(Arguments, self).__post_init__()  # super() not working here, unclear why.
+
+        # extract special attribute names
+        all_attributes = False
+        attributes_set: set[str] = set()
+        self.columns_keys = []
+        for column in list(self.columns):
+            column = column.lower()
+
+            if column == "*":
+                # '*' not allowed as table column, but for LDIF this means: get ALL attributes + do post processing
+                self.columns.remove("*")
+                all_attributes = True
+                continue
+
+            self.columns_keys.append(column)
+
+            if column == "dndomain":
+                self.post_process.setdefault("dn", {})[column] = _postprocess.parse_steps("domain")
+                attributes_set.add("dn")
+            elif column == "dnpath":
+                self.post_process.setdefault("dn", {})[column] = _postprocess.parse_steps("path")
+                attributes_set.add("dn")
+            elif column == "dnfullpath":
+                self.post_process.setdefault("dn", {})[column] = _postprocess.parse_steps("fullpath")
+                attributes_set.add("dn")
+            else:
+                col_parts = column.split(":", maxsplit=1)
+                attributes_set.add(col_parts[0])
+                if len(col_parts) == 2:
+                    source, steps = col_parts
+                    self.post_process.setdefault(source, {})[column] = _postprocess.parse_steps(steps)
+
+        if all_attributes:
+            self.attributes = []
+        else:
+            self.attributes = list(attributes_set)

src/ldaptool/search/arguments.py

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import argparse
 import dataclasses
 import typing
 
@@ -8,28 +7,8 @@ import ldaptool.decode.arguments
 from ldaptool._utils import argclasses
 
 
-def _parser_add_attributes(parser: argparse.ArgumentParser, dest: str) -> None:
-    parser.add_argument(
-        metavar="attributes",
-        dest=dest,
-        nargs="*",
-        help="""
-            Attributes to lookup (and columns to display in tables).
-            Fake attributes `dndomain`, `dnpath` an `dnfullpath` are available (created from dn).
-        """,
-    )
-
-
 @dataclasses.dataclass(slots=True, kw_only=True)
 class Arguments(ldaptool.decode.arguments.Arguments):
-    # overwrite fields for fake attributes to remove them from argparse;
-    # we enable those based on the attribute list
-    dndomain: bool = False
-    dnpath: bool = False
-    dnfullpath: bool = False
-
-    attributes: list[str] = dataclasses.field(default_factory=list, metadata=argclasses.manual(_parser_add_attributes))
-    columns: list[str] = dataclasses.field(default_factory=list)
     filter: typing.Optional[str] = dataclasses.field(default=None, metadata=argclasses.arg(help="LDAP query filter"))
     find: typing.Optional[str] = dataclasses.field(
         default=None,
@@ -75,6 +54,8 @@ class Arguments(ldaptool.decode.arguments.Arguments):
     )
 
     def __post_init__(self) -> None:
+        super(Arguments, self).__post_init__()  # super() not working here, unclear why.
+
         if not self.filter is None:
             if not self.find is None:
                 raise SystemExit("Can't use both --find and --filter")
@@ -86,19 +67,3 @@ class Arguments(ldaptool.decode.arguments.Arguments):
         else:
             # probably doesn't like empty filter?
             self.filter = "(objectClass=*)"
-
-        # extract special attribute names
-        self.columns = self.attributes  # use all names for columns (headings and their order)
-        attributes_set: dict[str, str] = {arg.lower(): arg for arg in self.attributes}  # index by lowercase name
-        # create fake attributes on demand
-        if attributes_set.pop("dndomain", ""):
-            self.dndomain = True
-        if attributes_set.pop("dnpath", ""):
-            self.dnpath = True
-        if attributes_set.pop("dnfullpath", ""):
-            self.dnfullpath = True
-        # store remaining attributes (with original case)
-        self.attributes = list(attributes_set.values())
-        if self.columns and not self.attributes:
-            # if we only wanted fake attributes, make sure we only request 'dn' - empty list would query all attributes
-            self.attributes = ["dn"]

src/ldaptool/search/config.py

@@ -7,6 +7,7 @@ import os
 import os.path
 import shlex
 import subprocess
+import sys
 import typing
 
 import yaml
@@ -28,13 +29,13 @@ class Realm:
 
     @staticmethod
     def load(name: str, data: typing.Any) -> Realm:
-        assert isinstance(data, dict)
-        domain = data.pop("domain")
-        servers = data.pop("servers").split()
-        forest_root_domain = data.pop("forest_root_domain", domain)
-        account = data.pop("account", None)
-        password_file = data.pop("password_file", None)
-        password_folder = data.pop("password_folder", None)
+        assert isinstance(data, dict), f"Realm section isn't a dictionary: {data!r}"
+        domain = data["domain"]
+        servers = data["servers"].split()
+        forest_root_domain = data.get("forest_root_domain", domain)
+        account = data.get("account", None)
+        password_file = data.get("password_file", None)
+        password_folder = data.get("password_folder", None)
         return Realm(
             name=name,
             domain=domain,
@@ -101,8 +102,8 @@ class Keyringer(PasswordManager):
     @staticmethod
     def load(data: typing.Any) -> Keyringer:
         assert isinstance(data, dict)
-        keyring = data.pop("keyring")
-        folder = data.pop("folder")
+        keyring = data["keyring"]
+        folder = data.get("folder", "")
         return Keyringer(keyring=keyring, folder=folder)
 
     def get_password(self, password_name: str) -> str:
@@ -145,9 +146,17 @@ class Keepass(PasswordManager):
     def get_password(self, password_name: str) -> str:
         import pykeepass  # already made sure it is avaiable above
 
-        password = getpass.getpass(f"KeePass password for database {self.database}: ")
-        kp = pykeepass.PyKeePass(self.database, password=password)
+        while True:
+            try:
+                password = getpass.getpass(f"KeePass password for database {self.database}: ")
+                kp = pykeepass.PyKeePass(self.database, password=password)
+                break
+            except pykeepass.exceptions.CredentialsError:
+                print("Invalid password", file=sys.stderr)
+
         entry = kp.find_entries(username=password_name, first=True)
+        if not entry:
+            raise SystemExit(f"no KeePass entry for {password_name!r} found")
         return entry.password  # type: ignore
 
 
@@ -190,8 +199,8 @@ class Config:
         with open(conf_path) as f:
             data = yaml.safe_load(f)
         assert isinstance(data, dict)
-        assert "realms" in data
-        realms_data = data.pop("realms")
+        assert "realms" in data, "Missing realms section in config"
+        realms_data = data["realms"]
         assert isinstance(realms_data, dict)
         realms = {}
         for name, realm_data in realms_data.items():
@@ -201,15 +210,15 @@ class Config:
         if "keyringer" in data:
             if password_manager:
                 raise ValueError("Can only set a single password manager")
-            password_manager = Keyringer.load(data.pop("keyringer"))
+            password_manager = Keyringer.load(data["keyringer"])
         if "keepass" in data:
             if password_manager:
                 raise ValueError("Can only set a single password manager")
-            password_manager = Keepass.load(data.pop("keepass"))
+            password_manager = Keepass.load(data["keepass"])
         if "password-script" in data:
             if password_manager:
                 raise ValueError("Can only set a single password manager")
-            password_manager = PasswordScript.load(data.pop("password-script"))
+            password_manager = PasswordScript.load(data["password-script"])
 
         return Config(realms=realms, password_manager=password_manager)
 
@@ -220,7 +229,11 @@ class Config:
         """
         if realm.account is None:
             raise RuntimeError("Can't get password without acccount - should use kerberos instead")
-        if self.password_manager:
-            return self.password_manager.get_password(realm.password_name)
 
-        return getpass.getpass(f"Enter password for {realm.password_name}: ")
+        try:
+            if self.password_manager:
+                return self.password_manager.get_password(realm.password_name)
+
+            return getpass.getpass(f"Enter password for {realm.password_name}: ")
+        except (KeyboardInterrupt, EOFError):
+            raise SystemExit("Password prompt / retrieval aborted")