# Contributed by Kelly Kranabetter.
import os, sys
import win32security, ntsecuritycon, pywintypes, winerror

# get security information
#name=r"c:\autoexec.bat"
#name= r"g:\!workgrp\lim"
name=sys.argv[0]

if not os.path.exists(name):
    print(name, "does not exist!")
    sys.exit()

print("On file " , name, "\n")

# get owner SID
print("OWNER")
try:
    sd= win32security.GetFileSecurity(name, win32security.OWNER_SECURITY_INFORMATION)
    sid= sd.GetSecurityDescriptorOwner()
    print("  ", win32security.LookupAccountSid(None, sid))
except pywintypes.error as exc:
    # in automation and network shares we see:
    # pywintypes.error: (1332, 'LookupAccountName', 'No mapping between account names and security IDs was done.')
    if exc.winerror != winerror.ERROR_NONE_MAPPED:
        raise
    print("No owner information is available")

# get group SID
try:
    print("GROUP")
    sd= win32security.GetFileSecurity(name, win32security.GROUP_SECURITY_INFORMATION)
    sid= sd.GetSecurityDescriptorGroup()
    print("  ", win32security.LookupAccountSid(None, sid))
except pywintypes.error as exc:
    if exc.winerror != winerror.ERROR_NONE_MAPPED:
        raise
    print("No group information is available")

# get ACEs
sd= win32security.GetFileSecurity(name, win32security.DACL_SECURITY_INFORMATION)
dacl= sd.GetSecurityDescriptorDacl()
if dacl == None:
    print("No Discretionary ACL")
else:
    for ace_no in range(0, dacl.GetAceCount()):
        ace= dacl.GetAce(ace_no)
        print("ACE", ace_no)

        print("  -Type")
        for i in ("ACCESS_ALLOWED_ACE_TYPE", "ACCESS_DENIED_ACE_TYPE", "SYSTEM_AUDIT_ACE_TYPE", "SYSTEM_ALARM_ACE_TYPE"):
            if getattr(ntsecuritycon, i) == ace[0][0]:
                print("    ", i)

        print("  -Flags", hex(ace[0][1]))
        for i in ("OBJECT_INHERIT_ACE", "CONTAINER_INHERIT_ACE", "NO_PROPAGATE_INHERIT_ACE", "INHERIT_ONLY_ACE", "SUCCESSFUL_ACCESS_ACE_FLAG", "FAILED_ACCESS_ACE_FLAG"):
            if getattr(ntsecuritycon, i) & ace[0][1] == getattr(ntsecuritycon, i):
                print("    ", i)

        print("  -mask", hex(ace[1]))

        # files and directories do permissions differently
        permissions_file= ("DELETE", "READ_CONTROL", "WRITE_DAC", "WRITE_OWNER", "SYNCHRONIZE", "FILE_GENERIC_READ", "FILE_GENERIC_WRITE", "FILE_GENERIC_EXECUTE", "FILE_DELETE_CHILD")
        permissions_dir= ("DELETE", "READ_CONTROL", "WRITE_DAC", "WRITE_OWNER", "SYNCHRONIZE", "FILE_ADD_SUBDIRECTORY", "FILE_ADD_FILE", "FILE_DELETE_CHILD", "FILE_LIST_DIRECTORY", "FILE_TRAVERSE", "FILE_READ_ATTRIBUTES", "FILE_WRITE_ATTRIBUTES", "FILE_READ_EA", "FILE_WRITE_EA")
        permissions_dir_inherit= ("DELETE", "READ_CONTROL", "WRITE_DAC", "WRITE_OWNER", "SYNCHRONIZE", "GENERIC_READ", "GENERIC_WRITE", "GENERIC_EXECUTE", "GENERIC_ALL")
        if os.path.isfile(name):
            permissions= permissions_file
        else:
            permissions= permissions_dir
            # directories also contain an ACE that is inherited by children (files) within them
            if ace[0][1] & ntsecuritycon.OBJECT_INHERIT_ACE == ntsecuritycon.OBJECT_INHERIT_ACE and ace[0][1] & ntsecuritycon.INHERIT_ONLY_ACE == ntsecuritycon.INHERIT_ONLY_ACE:
                permissions= permissions_dir_inherit

        calc_mask= 0  # calculate the mask so we can see if we are printing all of the permissions
        for i in permissions:
            if getattr(ntsecuritycon, i) & ace[1] == getattr(ntsecuritycon, i):
                calc_mask= calc_mask | getattr(ntsecuritycon, i)
                print("    ", i)
        print("  ", "Calculated Check Mask=", hex(calc_mask))
        print("  -SID\n    ", win32security.LookupAccountSid(None, ace[2]))