94 lines
2.8 KiB
Python
94 lines
2.8 KiB
Python
# DTLS exceptions. Written by Ray Brown
|
|
"""DTLS Errors
|
|
|
|
This module defines error functionality and exception types for the dtls
|
|
package.
|
|
|
|
Classes:
|
|
|
|
SSLError -- exception raised for I/O errors
|
|
InvalidSocketError -- exception raised for improper socket objects
|
|
"""
|
|
|
|
from socket import error as socket_error
|
|
|
|
SSL_ERROR_NONE = 0
|
|
SSL_ERROR_SSL = 1
|
|
SSL_ERROR_WANT_READ = 2
|
|
SSL_ERROR_WANT_WRITE = 3
|
|
SSL_ERROR_WANT_X509_LOOKUP = 4
|
|
SSL_ERROR_SYSCALL = 5
|
|
SSL_ERROR_ZERO_RETURN = 6
|
|
SSL_ERROR_WANT_CONNECT = 7
|
|
SSL_ERROR_WANT_ACCEPT = 8
|
|
|
|
ERR_BOTH_KEY_CERT_FILES = 500
|
|
ERR_BOTH_KEY_CERT_FILES_SVR = 298
|
|
ERR_NO_CERTS = 331
|
|
ERR_NO_CIPHER = 501
|
|
ERR_HANDSHAKE_TIMEOUT = 502
|
|
ERR_PORT_UNREACHABLE = 503
|
|
ERR_COOKIE_MISMATCH = 0x1408A134
|
|
|
|
|
|
class SSLError(socket_error):
|
|
"""This exception is raised by modules in the dtls package."""
|
|
def __init__(self, *args):
|
|
super(SSLError, self).__init__(*args)
|
|
|
|
|
|
class InvalidSocketError(Exception):
|
|
"""There is a problem with a socket passed to the dtls package."""
|
|
def __init__(self, *args):
|
|
super(InvalidSocketError, self).__init__(*args)
|
|
|
|
|
|
def _make_opensslerror_class():
|
|
global _OpenSSLError
|
|
class __OpenSSLError(SSLError):
|
|
"""
|
|
This exception is raised when an error occurs in the OpenSSL library
|
|
"""
|
|
def __init__(self, ssl_error, errqueue, result, func, args):
|
|
self.ssl_error = ssl_error
|
|
self.errqueue = errqueue
|
|
self.result = result
|
|
self.func = func
|
|
self.args = args
|
|
SSLError.__init__(self, ssl_error, errqueue,
|
|
result, func, args)
|
|
|
|
_OpenSSLError = __OpenSSLError
|
|
|
|
_make_opensslerror_class()
|
|
|
|
def openssl_error():
|
|
"""Return the OpenSSL error type for use in exception clauses"""
|
|
return _OpenSSLError
|
|
|
|
def raise_as_ssl_module_error():
|
|
"""Exceptions raised from this module are instances of ssl.SSLError"""
|
|
import ssl
|
|
global SSLError
|
|
SSLError = ssl.SSLError
|
|
_make_opensslerror_class()
|
|
|
|
def raise_ssl_error(code, nested=None):
|
|
"""Raise an SSL error with the given error code"""
|
|
err_string = str(code) + ": " + _ssl_errors[code]
|
|
if nested:
|
|
raise SSLError(err_string, nested)
|
|
raise SSLError(err_string)
|
|
|
|
_ssl_errors = {
|
|
ERR_NO_CERTS: "No root certificates specified for verification " + \
|
|
"of other-side certificates",
|
|
ERR_BOTH_KEY_CERT_FILES: "Both the key & certificate files " + \
|
|
"must be specified",
|
|
ERR_BOTH_KEY_CERT_FILES_SVR: "Both the key & certificate files must be " + \
|
|
"specified for server-side operation",
|
|
ERR_NO_CIPHER: "No cipher can be selected.",
|
|
ERR_HANDSHAKE_TIMEOUT: "The handshake operation timed out",
|
|
ERR_PORT_UNREACHABLE: "The peer address is not reachable",
|
|
}
|