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118 lines
3.8 KiB
Python
118 lines
3.8 KiB
Python
import re
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import pwd
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import lib.sqlitedb
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import lib.CFG as CFG
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def checkUsernameCharacters(username: str):
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if " " not in username and "_" not in username and username.isascii() and username[:1].islower() and \
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not username[0].isnumeric():
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if not re.search(r"\W+", username):
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if not re.search("[^a-zA-Z0-9]", username):
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return True
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return False
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def checkUsernameLength(username: str):
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if len(username) > 16:
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return False
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if len(username) < 3:
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return False
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return True
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def checkUserExists(username: str):
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try:
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pwd.getpwnam(username)
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except KeyError:
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return True # User already exists
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else:
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if checkUserInDB(username):
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return True
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return False
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def checkUserInDB(username: str):
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try:
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L = lib.sqlitedb.SQLitedb(CFG.REG_FILE)
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fetched = L.safequery("SELECT * FROM 'applications' WHERE username = ?", tuple([username]))
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if fetched:
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return True
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except lib.sqlitedb.sqlite3.Error as e:
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print(f"SQLite Exception: {e}")
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return False
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def checkSSHKey(key: str):
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# taken from https://github.com/hashbang/provisor/blob/master/provisor/utils.py, all belongs to them! ;)
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import base64
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if len(key) > 8192 or len(key) < 80:
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return False
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key = key.replace("\"", "").replace("'", "").replace("\\\"", "")
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key = key.split(' ')
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types = ['ecdsa-sha2-nistp256', 'ecdsa-sha2-nistp384',
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'ecdsa-sha2-nistp521', 'ssh-rsa', 'ssh-dss', 'ssh-ed25519']
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if key[0] not in types:
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return False
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try:
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base64.decodebytes(bytes(key[1], "utf-8"))
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except TypeError:
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return False
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return True
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def checkEmail(mail: str):
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if not re.match("(^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$)", mail):
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return False
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else:
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return True
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def checkDatetimeFormat(form: str):
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import datetime
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try:
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datetime.datetime.strptime(form, "%Y-%m-%d %H:%M:%S")
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except ValueError:
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return False
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return True
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def checkImportFile(f):
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import csv
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reador = csv.DictReader(f)
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error_list = str()
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valid = True
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ln = 1 # line number
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for row in reador:
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# if any of this fails move on to the next user, just print a relatively helpful message lel
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if not lib.validator.checkUsernameCharacters(row["username"]):
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error_list += (f"Line {ln}: Username contains unsupported characters or starts with a number: '"
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f"{row['username']}'.\n")
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valid = False
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if not lib.validator.checkUsernameLength(row["username"]):
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error_list += f"Line {ln}: Username '{row['username']}' is either too long(>16) or short(<3)\n"
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valid = False
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if not lib.validator.checkSSHKey(row["pubkey"]):
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error_list += f"Line {ln}: Following SSH-Key of user '{row['username']}' isn't valid: '{row['pubkey']}'."\
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f"\n"
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valid = False
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if not lib.validator.checkEmail(row["email"]):
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error_list += f"Line {ln}: E-Mail address of user '{row['username']}' '{row['email']}' is not valid.\n"
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valid = False
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if not lib.validator.checkUserExists(row["username"]):
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error_list += f"Line {ln}: User '{row['username']}' already exists.\n"
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valid = False
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if not lib.validator.checkDatetimeFormat(row["timestamp"]):
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error_list += f"Line {ln}: Timestamp '{row['timestamp']}' from user '{row['username']}' is invalid.\n"
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valid = False
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if int(row["status"]) > 1 or int(row["status"]) < 0:
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error_list += f"Line {ln}: Status '{row['status']}' MUST be either 0 or 1.\n"
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valid = False
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ln += 1
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if valid:
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return True
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else:
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return error_list
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