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class PrincipalSource

Maturity: 42

An enumeration-style class that defines constants representing different sources from which a principal (user identity) can be obtained in an authentication/authorization context.

File:
/tf/active/vicechatdev/SPFCsync/venv/lib64/python3.11/site-packages/office365/sharepoint/principal/source.py
Lines:
1 - 23
Complexity:
simple

Purpose

PrincipalSource provides a set of integer constants that act as flags to specify where principal (user) information should be retrieved from. It supports bitwise operations through its values, allowing multiple sources to be combined. This is commonly used in security and authentication systems to determine which identity providers or user information sources should be consulted when establishing a user's identity and permissions.

Source Code

class PrincipalSource:
    """Specifies the source of a principal."""

    def __init__(self):
        pass

    None_ = 0
    """Do not specify a principal source."""

    UserInfoList = 1
    """Use the user information list as the source."""

    Windows = 2
    """Use Windows as the source."""

    MembershipProvider = 4
    """Use the current membership provider as the source."""

    RoleProvider = 8
    """Use the current role provider as the source"""

    All = 15
    """Use all principal sources."""

Parameters

Name Type Default Kind
bases - -

Parameter Details

bases: This parameter appears in the docstring but is not actually used in the __init__ method. The constructor takes no parameters and performs no initialization.

Return Value

Instantiating PrincipalSource returns a PrincipalSource object, though the class is primarily designed to be used for its class-level constants rather than creating instances. The constants (None_, UserInfoList, Windows, MembershipProvider, RoleProvider, All) return integer values that can be used as flags.

Class Interface

Methods

__init__(self) -> None

Purpose: Initializes a PrincipalSource instance. The constructor is empty and performs no operations.

Returns: None - creates an instance of PrincipalSource

Attributes

Name Type Description Scope
None_ int Constant value 0 indicating no principal source should be specified class
UserInfoList int Constant value 1 indicating the user information list should be used as the principal source class
Windows int Constant value 2 indicating Windows authentication should be used as the principal source class
MembershipProvider int Constant value 4 indicating the current membership provider should be used as the principal source class
RoleProvider int Constant value 8 indicating the current role provider should be used as the principal source class
All int Constant value 15 representing all principal sources combined (bitwise OR of all other constants) class

Usage Example

# Using PrincipalSource constants as flags
from principal_source import PrincipalSource

# Use a single source
source = PrincipalSource.Windows
print(source)  # Output: 2

# Combine multiple sources using bitwise OR
combined_source = PrincipalSource.UserInfoList | PrincipalSource.Windows
print(combined_source)  # Output: 3

# Check if a specific source is included using bitwise AND
if combined_source & PrincipalSource.Windows:
    print("Windows source is included")

# Use all sources
all_sources = PrincipalSource.All
print(all_sources)  # Output: 15

# Check if a source is set in a combined value
if all_sources & PrincipalSource.MembershipProvider:
    print("MembershipProvider is included in All")

# Instantiation (though typically not needed)
ps = PrincipalSource()
print(ps.Windows)  # Output: 2

Best Practices

  • This class is designed as a constants container (similar to an enum) and typically should not be instantiated. Access the constants directly via the class name (e.g., PrincipalSource.Windows).
  • The integer values are designed to work as bit flags, allowing multiple sources to be combined using bitwise OR (|) operations.
  • Use bitwise AND (&) to check if a specific source is included in a combined value.
  • The 'All' constant (15) is the bitwise OR of all other sources (1|2|4|8 = 15), representing all available principal sources.
  • The 'None_' constant uses an underscore suffix to avoid conflict with Python's None keyword.
  • Consider using Python's enum.IntFlag from the standard library for similar functionality in modern Python code, as it provides better type safety and IDE support.

Tags

authentication authorization principal security identity enumeration flags constants user-management access-control

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