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import time
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from sqlite3 import Connection, Error
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from typing import Dict, List
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from src.exceptions.database_exception import DatabaseException
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from injector import inject
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from src.constants import *
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from src.model.certificate import Certificate
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class CertificateRepository:
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@inject
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def __init__(self, connection: Connection):
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"""
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Constructor of the CertificateRepository object
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:param connection: Instance of the Connection object
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"""
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self.connection = connection
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self.cursor = connection.cursor()
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def create(self, certificate: Certificate):
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"""
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Creates a certificate.
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For root certificate (CA) the parent certificate id is modified to the same id (id == parent_id).
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:param certificate: Instance of the Certificate object
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:return: the result of whether the creation was successful
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"""
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try:
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sql = (f"INSERT INTO {TAB_CERTIFICATES} "
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f"({COL_COMMON_NAME},"
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f"{COL_VALID_FROM},"
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f"{COL_VALID_TO},"
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f"{COL_PEM_DATA},"
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f"{COL_PRIVATE_KEY_ID},"
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f"{COL_TYPE_ID},"
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f"{COL_PARENT_ID})"
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f"VALUES(?,?,?,?,?,?,?)")
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values = [certificate.common_name,
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certificate.valid_from,
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certificate.valid_to,
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certificate.pem_data,
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certificate.private_key_id,
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certificate.type_id,
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certificate.parent_id]
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self.cursor.execute(sql, values)
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self.connection.commit()
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last_id: int = self.cursor.lastrowid
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# TODO assure that this is correct
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if certificate.type_id == ROOT_CA_ID:
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certificate.parent_id = last_id
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self.update(last_id, certificate)
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else:
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for usage_id, usage_value in certificate.usages.items():
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if usage_value:
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sql = (f"INSERT INTO {TAB_CERTIFICATE_USAGES} "
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f"({COL_CERTIFICATE_ID},"
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f"{COL_USAGE_TYPE_ID}) "
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f"VALUES (?,?)")
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values = [last_id, usage_id]
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self.cursor.execute(sql, values)
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self.connection.commit()
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except Error as e:
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raise DatabaseException(e)
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return last_id
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def read(self, certificate_id: int):
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"""
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Reads (selects) a certificate.
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:param certificate_id: ID of specific certificate
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:return: instance of the Certificate object
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"""
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try:
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sql = (f"SELECT * FROM {TAB_CERTIFICATES} "
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f"WHERE {COL_ID} = ? AND ({COL_DELETION_DATE} IS NULL OR {COL_DELETION_DATE} = '')")
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values = [certificate_id]
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self.cursor.execute(sql, values)
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certificate_row = self.cursor.fetchone()
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if certificate_row is None:
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return None
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sql = (f"SELECT * FROM {TAB_CERTIFICATE_USAGES} "
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f"WHERE {COL_CERTIFICATE_ID} = ?")
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self.cursor.execute(sql, values)
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usage_rows = self.cursor.fetchall()
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usage_dict: Dict[int, bool] = {}
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for usage_row in usage_rows:
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usage_dict[usage_row[2]] = True
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certificate: Certificate = Certificate(certificate_row[0],
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certificate_row[1],
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certificate_row[2],
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certificate_row[3],
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certificate_row[4],
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certificate_row[8],
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certificate_row[9],
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certificate_row[10],
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usage_dict,
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certificate_row[5],
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certificate_row[6])
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except Error as e:
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raise DatabaseException(e)
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return certificate
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def read_all(self, filter_type: int = None):
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"""
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Reads (selects) all certificates (with type).
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:param filter_type: ID of certificate type from CertificateTypes table
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:return: list of certificates
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"""
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try:
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sql_extension = ""
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values = []
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if filter_type is not None:
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sql_extension = (f" AND {COL_TYPE_ID} = ("
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f"SELECT {COL_ID} FROM {TAB_CERTIFICATE_TYPES} WHERE {COL_ID} = ?)")
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values = [filter_type]
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sql = (f"SELECT * FROM {TAB_CERTIFICATES} "
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f"WHERE ({COL_DELETION_DATE} IS NULL OR {COL_DELETION_DATE} = ''){sql_extension}")
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self.cursor.execute(sql, values)
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certificate_rows = self.cursor.fetchall()
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certificates: List[Certificate] = []
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for certificate_row in certificate_rows:
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sql = (f"SELECT * FROM {TAB_CERTIFICATE_USAGES} "
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f"WHERE {COL_CERTIFICATE_ID} = ?")
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values = [certificate_row[0]]
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self.cursor.execute(sql, values)
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usage_rows = self.cursor.fetchall()
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usage_dict: Dict[int, bool] = {}
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for usage_row in usage_rows:
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usage_dict[usage_row[2]] = True
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certificates.append(Certificate(certificate_row[0],
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certificate_row[1],
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certificate_row[2],
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certificate_row[3],
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certificate_row[4],
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certificate_row[8],
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certificate_row[9],
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certificate_row[10],
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usage_dict,
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certificate_row[5],
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certificate_row[6]))
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except Error as e:
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raise DatabaseException(e)
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return certificates
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def update(self, certificate_id: int, certificate: Certificate):
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"""
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Updates a certificate.
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If the parameter of certificate (Certificate object) is not to be changed,
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the same value must be specified.
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:param certificate_id: ID of specific certificate
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:param certificate: Instance of the Certificate object
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:return: the result of whether the updation was successful
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"""
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try:
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sql = (f"UPDATE {TAB_CERTIFICATES} "
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f"SET {COL_COMMON_NAME} = ?, "
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f"{COL_VALID_FROM} = ?, "
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f"{COL_VALID_TO} = ?, "
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f"{COL_PEM_DATA} = ?, "
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f"{COL_PRIVATE_KEY_ID} = ?, "
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f"{COL_TYPE_ID} = ?, "
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f"{COL_PARENT_ID} = ? "
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f"WHERE {COL_ID} = ?")
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values = [certificate.common_name,
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certificate.valid_from,
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certificate.valid_to,
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certificate.pem_data,
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certificate.private_key_id,
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certificate.type_id,
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certificate.parent_id,
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certificate_id]
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self.cursor.execute(sql, values)
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self.connection.commit()
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sql = (f"DELETE FROM {TAB_CERTIFICATE_USAGES} "
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f"WHERE {COL_CERTIFICATE_ID} = ?")
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values = [certificate_id]
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self.cursor.execute(sql, values)
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self.connection.commit()
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check_updated = self.cursor.rowcount > 0
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# iterate over usage pairs
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for usage_id, usage_value in certificate.usages.items():
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if usage_value:
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sql = (f"INSERT INTO {TAB_CERTIFICATE_USAGES} "
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f"({COL_CERTIFICATE_ID},"
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f"{COL_USAGE_TYPE_ID}) "
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f"VALUES (?,?)")
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values = [certificate_id, usage_id]
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self.cursor.execute(sql, values)
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self.connection.commit()
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except Error as e:
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raise DatabaseException(e)
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return check_updated
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def delete(self, certificate_id: int):
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"""
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Deletes a certificate
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:param certificate_id: ID of specific certificate
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:return: the result of whether the deletion was successful
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"""
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try:
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sql = (f"UPDATE {TAB_CERTIFICATES} "
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f"SET {COL_DELETION_DATE} = ? "
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f"WHERE {COL_ID} = ? AND ({COL_DELETION_DATE} IS NULL OR {COL_DELETION_DATE} = '')")
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values = [int(time.time()),
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certificate_id]
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self.cursor.execute(sql, values)
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self.connection.commit()
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except Error as e:
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raise DatabaseException(e)
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return self.cursor.rowcount > 0
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def set_certificate_revoked(
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self, certificate_id: int, revocation_date: str, revocation_reason: str = REV_REASON_UNSPECIFIED):
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"""
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Revoke a certificate
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:param certificate_id: ID of specific certificate
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:param revocation_date: Date, when the certificate is revoked
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:param revocation_reason: Reason of the revocation
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:return:
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the result of whether the revocation was successful OR
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sqlite3.Error if an exception is thrown
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"""
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try:
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if revocation_date != "" and revocation_reason == "":
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revocation_reason = REV_REASON_UNSPECIFIED
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elif revocation_date == "":
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return False
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sql = (f"UPDATE {TAB_CERTIFICATES} "
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f"SET {COL_REVOCATION_DATE} = ?, "
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f"{COL_REVOCATION_REASON} = ? "
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f"WHERE {COL_ID} = ? AND ({COL_REVOCATION_DATE} IS NULL OR {COL_REVOCATION_DATE} = '')")
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values = [revocation_date,
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revocation_reason,
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certificate_id]
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self.cursor.execute(sql, values)
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self.connection.commit()
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except Error as e:
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raise DatabaseException(e)
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return self.cursor.rowcount > 0
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def clear_certificate_revocation(self, certificate_id: int):
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"""
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283
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Clear revocation of a certificate
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284
|
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:param certificate_id: ID of specific certificate
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286
|
|
287
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:return:
|
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the result of whether the clear revocation was successful OR
|
289
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sqlite3.Error if an exception is thrown
|
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"""
|
291
|
|
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try:
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sql = (f"UPDATE {TAB_CERTIFICATES} "
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f"SET {COL_REVOCATION_DATE} = '', "
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f"{COL_REVOCATION_REASON} = '' "
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f"WHERE {COL_ID} = ?")
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values = [certificate_id]
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self.cursor.execute(sql, values)
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self.connection.commit()
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except Error as e:
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301
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raise DatabaseException(e)
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302
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303
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return self.cursor.rowcount > 0
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305
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def get_all_revoked_by(self, certificate_id: int):
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"""
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Get list of the revoked certificates that are direct descendants of the certificate with the ID
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308
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309
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:param certificate_id: ID of specific certificate
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310
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311
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:return:
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312
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list of the certificates OR
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None if the list is empty OR
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314
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sqlite3.Error if an exception is thrown
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"""
|
316
|
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317
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try:
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318
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sql = (f"SELECT * FROM {TAB_CERTIFICATES} "
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319
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f"WHERE {COL_PARENT_ID} = ? AND {COL_REVOCATION_DATE} IS NOT NULL AND {COL_REVOCATION_DATE} != ''")
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values = [certificate_id]
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self.cursor.execute(sql, values)
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322
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certificate_rows = self.cursor.fetchall()
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certificates: List[Certificate] = []
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for certificate_row in certificate_rows:
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sql = (f"SELECT * FROM {TAB_CERTIFICATE_USAGES} "
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f"WHERE {COL_CERTIFICATE_ID} = ?")
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values = [certificate_row[0]]
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self.cursor.execute(sql, values)
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usage_rows = self.cursor.fetchall()
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332
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usage_dict: Dict[int, bool] = {}
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for usage_row in usage_rows:
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usage_dict[usage_row[2]] = True
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335
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336
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certificates.append(Certificate(certificate_row[0],
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337
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certificate_row[1],
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338
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certificate_row[2],
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339
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certificate_row[3],
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340
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certificate_row[4],
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341
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certificate_row[8],
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342
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certificate_row[9],
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343
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certificate_row[10],
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344
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usage_dict,
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345
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certificate_row[5],
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certificate_row[6]))
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347
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except Error as e:
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348
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raise DatabaseException(e)
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349
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|
350
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return certificates
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351
|
|
352
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def get_all_issued_by(self, certificate_id: int):
|
353
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"""
|
354
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Get list of the certificates that are direct descendants of the certificate with the ID
|
355
|
|
356
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:param certificate_id: ID of specific certificate
|
357
|
|
358
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:return:
|
359
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list of the certificates OR
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360
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None if the list is empty OR
|
361
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sqlite3.Error if an exception is thrown
|
362
|
"""
|
363
|
|
364
|
try:
|
365
|
sql = (f"SELECT * FROM {TAB_CERTIFICATES} "
|
366
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f"WHERE {COL_PARENT_ID} = ? AND {COL_ID} != ? AND "
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367
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f"({COL_DELETION_DATE} IS NULL OR {COL_DELETION_DATE} = '')")
|
368
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values = [certificate_id, certificate_id]
|
369
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self.cursor.execute(sql, values)
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370
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certificate_rows = self.cursor.fetchall()
|
371
|
|
372
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certificates: List[Certificate] = []
|
373
|
for certificate_row in certificate_rows:
|
374
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sql = (f"SELECT * FROM {TAB_CERTIFICATE_USAGES} "
|
375
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f"WHERE {COL_CERTIFICATE_ID} = ?")
|
376
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values = [certificate_row[0]]
|
377
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self.cursor.execute(sql, values)
|
378
|
usage_rows = self.cursor.fetchall()
|
379
|
|
380
|
usage_dict: Dict[int, bool] = {}
|
381
|
for usage_row in usage_rows:
|
382
|
usage_dict[usage_row[2]] = True
|
383
|
|
384
|
certificates.append(Certificate(certificate_row[0],
|
385
|
certificate_row[1],
|
386
|
certificate_row[2],
|
387
|
certificate_row[3],
|
388
|
certificate_row[4],
|
389
|
certificate_row[8],
|
390
|
certificate_row[9],
|
391
|
certificate_row[10],
|
392
|
usage_dict,
|
393
|
certificate_row[5],
|
394
|
certificate_row[6]))
|
395
|
except Error as e:
|
396
|
raise DatabaseException(e)
|
397
|
|
398
|
return certificates
|
399
|
|
400
|
def get_all_descendants_of(self, certificate_id: int):
|
401
|
"""
|
402
|
Get a list of all certificates C such that the certificate identified by "certificate_id" belongs to a trust chain
|
403
|
between C and its root certificate authority (i.e. is an ancestor of C).
|
404
|
:param certificate_id: target certificate ID
|
405
|
:return: list of all descendants
|
406
|
"""
|
407
|
def dfs(children_of, this, collection: list):
|
408
|
for child in children_of(this.certificate_id):
|
409
|
dfs(children_of, child, collection)
|
410
|
collection.append(this)
|
411
|
|
412
|
subtree_root = self.read(certificate_id)
|
413
|
if subtree_root is None:
|
414
|
return None
|
415
|
|
416
|
all_certs = []
|
417
|
dfs(self.get_all_issued_by, subtree_root, all_certs)
|
418
|
return all_certs
|
419
|
|
420
|
def get_next_id(self) -> int:
|
421
|
"""
|
422
|
Get identifier of the next certificate that will be inserted into the database
|
423
|
:return: identifier of the next certificate that will be added into the database
|
424
|
"""
|
425
|
# get next IDs of all tables
|
426
|
self.cursor.execute("SELECT * FROM SQLITE_SEQUENCE")
|
427
|
results = self.cursor.fetchall()
|
428
|
|
429
|
# search for next ID in Certificates table and return it
|
430
|
for result in results:
|
431
|
if result[0] == TAB_CERTIFICATES:
|
432
|
return result[1] + 1 # current last id + 1
|
433
|
# if certificates table is not present in the query results, return 1
|
434
|
return 1
|