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@ -1,9 +1,19 @@
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import re
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import pwd
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import lib.sqlitedb
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import csv
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def checkUsernameCharacters(username: str) -> bool:
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""" Checks the Username for invalid characters. Allow only alphanumerical characters, a lower alpha one first,
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Followed by any sequence of digits and characters
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:param username: String to check for validity
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:type username: str
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:return: True when valid, False when not
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:rtype: bool
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"""
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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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@ -12,15 +22,35 @@ def checkUsernameCharacters(username: str) -> bool:
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return False
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def checkUsernameLength(username: str) -> bool:
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if len(username) > 16:
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def checkUsernameLength(username: str, upper_limit: int = 16, lower_limit: int = 3) -> bool:
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""" Checks username for an upper and lower bounds limit character count
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:param username: Username to check
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:type username: str
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:param upper_limit: Upper limit bounds to check for(default is 16)
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:type upper_limit: int
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:param lower_limit: Lower limit bounds to check for(default is 3)
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:return: True, when all bounds are in, False when one or both aren't.
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:rtype: bool
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"""
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if len(username) > upper_limit:
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return False
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if len(username) < 3:
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if len(username) < lower_limit:
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return False
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return True
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def checkUserExists(username: str) -> bool:
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""" Checks if the User exists on the **SYSTEM** by calling PWD on it.
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**Note**: You might want to use this in conjunction with checkUserInDB
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:param username:
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:type username: str
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:return: True when exists, False when not
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:rtype: bool
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"""
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try:
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pwd.getpwnam(username)
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except KeyError:
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@ -30,6 +60,16 @@ def checkUserExists(username: str) -> bool:
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def checkUserInDB(username: str, db: str) -> bool:
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""" Checks users existence in the **DATABASE**.
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:Note: You might want to use this in conjunction with `checkUserExists`
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:param username: Username to check existence in database
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:type username: str
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:param db: Path to database to check in
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:type db: str
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:return: True, when User exists, False when not
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"""
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try:
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ldb = lib.sqlitedb.SQLitedb(db)
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fetched = ldb.safequery("SELECT * FROM 'applications' WHERE username = ?", tuple([username]))
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@ -41,6 +81,16 @@ def checkUserInDB(username: str, db: str) -> bool:
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def checkSSHKey(key: str) -> bool:
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""" Checks SSH Key for meta-data that we accept.
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:Note: We currently only allow ssh keys without options but with a mail address at the end in b64 encoded.
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The currently supported algorithms are: ecdfsa-sha2-nistp256, 'ecdsa-sha2-nistp384', 'ecdsa-sha2-nistp521',
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'ssh-rsa', 'ssh-dss' and 'ssh-ed25519'
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:param key: Key to check
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:return: True, when Key is valid, False when not
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:rtype: bool
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"""
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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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@ -60,66 +110,110 @@ def checkSSHKey(key: str) -> bool:
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def checkEmail(mail: str) -> bool:
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""" Checks Mail against a relatively simple REgex Pattern.
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:param mail: Mail to check
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:type mail: str
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:return: False, when the Mail is invalid, True when valid.
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:rtype: bool
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"""
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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) -> bool :
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def checkDatetimeFormat(datetime_str: str) -> bool:
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""" Checks a Strings format on date time.
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:param datetime_str: String to check
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:type datetime_str: str
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:return: True when valid, False when not.
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:rtype: bool
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"""
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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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datetime.datetime.strptime(datetime_str, "%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 checkName(name: str) -> bool:
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""" Checks a users (real) Name against a real simple REgex Pattern.
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:param name: Name/String to check
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:type name: str
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:return: True when valid, False when not.
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:rtype: bool
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"""
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if not re.match("\w+\s*\w", name):
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return False
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else:
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return True
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def checkImportFile(fname: str, db: str) -> bool:
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error_list = str()
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def checkImportFile(path: str, db: str):
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""" Checks an CSV file against most of the validators and prints an Error message with the line number corresponding
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to said failure.. Those includes: checkName, checkUsernameCharacters,
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ckeckUsernameLength, duplicate usernames(in the CSV), checkSSHKey, checkEmail, checkUserExists, checkUserInDB,
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checkDatetimeformat and if the status is 1 or 0.
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:param path: Path to file to check
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:type path: str
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:param db: Path to database file(SQLite)
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:type db: str
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:return: Str when Failure, True when success(All tests passed)
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:rtype: Str or None
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"""
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errstr = ""
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valid = True
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ln = 1 # line number
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with open(fname, 'r', newline='') as f:
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import csv
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reador = csv.DictReader(f)
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for row in reador:
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valid_names_list = []
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with open(path, 'r', newline='') as f:
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reader = csv.DictReader(f)
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for row in reader:
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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.checkName(row["name"]):
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error_list += f"Line{ln}: {row['name']} seems not legit. Character followed by character should be " \
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f"correct.\n"
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errstr += f"Line {ln}: Name: '{row['name']}' seems not legit. Character followed by character should" \
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f" be correct.\n"
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valid = False
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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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errstr += (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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errstr += 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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# dup checking
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if row["username"] in valid_names_list:
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errstr += f"Line {ln}: Duplicate Username {row['username']}!\n"
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valid = False
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else:
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valid_names_list.append(row["username"])
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# dup end
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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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errstr += f"Line {ln}: Following SSH-Key of user '{row['username']}' isn't valid: " \
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f"'{row['pubkey']}'.\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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errstr += 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"]) or checkUserInDB(row["username"], db):
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error_list += f"Line {ln}: User '{row['username']}' already exists.\n"
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errstr += 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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errstr += 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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errstr += 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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return errstr
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