117 lines
3.6 KiB
Python
117 lines
3.6 KiB
Python
# DTLS exceptions.
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# Copyright 2012 Ray Brown
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# The License is also distributed with this work in the file named "LICENSE."
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""DTLS Errors
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This module defines error functionality and exception types for the dtls
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package.
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Classes:
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SSLError -- exception raised for I/O errors
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InvalidSocketError -- exception raised for improper socket objects
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"""
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from socket import error as socket_error
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SSL_ERROR_NONE = 0
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SSL_ERROR_SSL = 1
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SSL_ERROR_WANT_READ = 2
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SSL_ERROR_WANT_WRITE = 3
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SSL_ERROR_WANT_X509_LOOKUP = 4
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SSL_ERROR_SYSCALL = 5
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SSL_ERROR_ZERO_RETURN = 6
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SSL_ERROR_WANT_CONNECT = 7
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SSL_ERROR_WANT_ACCEPT = 8
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ERR_BOTH_KEY_CERT_FILES = 500
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ERR_BOTH_KEY_CERT_FILES_SVR = 298
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ERR_NO_CERTS = 331
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ERR_NO_CIPHER = 501
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ERR_READ_TIMEOUT = 502
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ERR_WRITE_TIMEOUT = 503
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ERR_HANDSHAKE_TIMEOUT = 504
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ERR_PORT_UNREACHABLE = 505
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ERR_WRONG_VERSION_NUMBER = 0x1408A10B
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ERR_COOKIE_MISMATCH = 0x1408A134
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class SSLError(socket_error):
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"""This exception is raised by modules in the dtls package."""
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def __init__(self, *args):
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super(SSLError, self).__init__(*args)
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class InvalidSocketError(Exception):
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"""There is a problem with a socket passed to the dtls package."""
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def __init__(self, *args):
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super(InvalidSocketError, self).__init__(*args)
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def _make_opensslerror_class():
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global _OpenSSLError
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class __OpenSSLError(SSLError):
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"""
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This exception is raised when an error occurs in the OpenSSL library
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"""
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def __init__(self, ssl_error, errqueue, result, func, args):
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self.ssl_error = ssl_error
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self.errqueue = errqueue
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self.result = result
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self.func = func
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self.args = args
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SSLError.__init__(self, ssl_error, errqueue,
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result, func, args)
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_OpenSSLError = __OpenSSLError
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_make_opensslerror_class()
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def openssl_error():
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"""Return the OpenSSL error type for use in exception clauses"""
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return _OpenSSLError
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def raise_as_ssl_module_error():
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"""Exceptions raised from this module are instances of ssl.SSLError"""
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import ssl
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global SSLError
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SSLError = ssl.SSLError
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_make_opensslerror_class()
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def raise_ssl_error(code, nested=None):
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"""Raise an SSL error with the given error code"""
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err_string = str(code) + ": " + _ssl_errors[code]
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if nested:
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raise SSLError(code, err_string + str(nested))
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raise SSLError(code, err_string)
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_ssl_errors = {
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ERR_NO_CERTS: "No root certificates specified for verification " + \
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"of other-side certificates",
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ERR_BOTH_KEY_CERT_FILES: "Both the key & certificate files " + \
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"must be specified",
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ERR_BOTH_KEY_CERT_FILES_SVR: "Both the key & certificate files must be " + \
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"specified for server-side operation",
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ERR_NO_CIPHER: "No cipher can be selected.",
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ERR_READ_TIMEOUT: "The read operation timed out",
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ERR_WRITE_TIMEOUT: "The write operation timed out",
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ERR_HANDSHAKE_TIMEOUT: "The handshake operation timed out",
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ERR_PORT_UNREACHABLE: "The peer address is not reachable",
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}
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