Undocumented
Interface |
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Trust settings for an OpenSSL context. |
Class |
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Base class for public (certificate only) and private (certificate + key pair) certificates. |
Class |
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Client creator for TLS. |
Class |
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Trust an explicitly specified set of certificates, represented by a list of OpenSSL.crypto.X509 objects. |
Class |
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A representation of an OpenSSL cipher. |
Class |
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A PublicKey is a representation of the public part of a key pair. |
Exception |
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Not a very useful verification error. |
Function | simple |
Check only the common name in the certificate presented by the peer and only for an exact match. |
Function | simple |
Always fails validation of IP addresses |
Variable | default |
Undocumented |
Variable | verify |
Undocumented |
Variable | verify |
Undocumented |
Class | _ |
Chooses the best elliptic curve for Elliptic Curve Diffie-Hellman key exchange, and provides a configureECDHCurve method to set the curve, when appropriate, on a new OpenSSL.SSL.Context . |
Function | _expand |
Expand cipherString according to method and options to a tuple of explicit ciphers that are supported by the current platform. |
Function | _get |
Given a pair of TLSVersion constants, figure out what versions we want to disable (as OpenSSL is an exclusion based API). |
Function | _handleattrhelper |
(private) Helper for Certificate.peerFromTransport and Certificate.hostFromTransport which checks for incompatible handle types and null certificates and raises the appropriate exception or returns the appropriate certificate object. |
Function | _select |
Caclulate the acceptable list of ciphers from the ciphers we want and the ciphers we have support for. |
Function | _select |
Determine if service_identity is installed. If so, use it. If not, use simplistic and incorrect checking as implemented in simpleVerifyHostname . |
Function | _set |
Called to set up the OpenSSL.SSL.Context for doing NPN and/or ALPN negotiation. |
Function | _tolerate |
Wrap up an info_callback for pyOpenSSL so that if something goes wrong the error is immediately logged and the connection is dropped if possible. |
Function | _usable |
Check pyOpenSSL version string whether we can use it for host verification. |
Variable | _default |
Undocumented |
Variable | _log |
Undocumented |
Variable | _tls |
Undocumented |
Variable | _x509names |
Undocumented |
Check only the common name in the certificate presented by the peer and only for an exact match.
This is to provide something in the way of hostname verification to users who haven't installed service_identity. This check is overly strict, relies on a deprecated TLS feature (you're supposed to ignore the commonName if the subjectAlternativeName extensions are present, I believe), and lots of valid certificates will fail.
Parameters | |
connection:OpenSSL.SSL.Connection | the OpenSSL connection to verify. |
hostname:unicode | The hostname expected by the user. |
Raises | |
twisted.internet.ssl.VerificationError | if the common name and hostname don't match. |
Always fails validation of IP addresses
Parameters | |
connection:OpenSSL.SSL.Connection | the OpenSSL connection to verify. |
hostname:unicode | The hostname expected by the user. |
Raises | |
twisted.internet.ssl.VerificationError | Always raised |
Expand cipherString according to method and options to a tuple of explicit ciphers that are supported by the current platform.
Parameters | |
cipherunicode | An OpenSSL cipher string to expand. |
method | An OpenSSL method like SSL.TLS_METHOD used for determining the effective ciphers. |
options:int | OpenSSL options like SSL.OP_NO_SSLv3 ORed together. |
Returns | |
tuple of ICipher | The effective list of explicit ciphers that results from the arguments on the current platform. |
Given a pair of TLSVersion
constants, figure out what versions we want to disable (as OpenSSL is an exclusion based API).
Parameters | |
oldest:TLSVersion constant | The oldest TLSVersion we want to allow. |
newest:TLSVersion constant or None | The newest TLSVersion we want to allow, or None for no upper limit. |
Returns | |
list of TLSVersion constants. | The versions we want to disable. |
(private) Helper for Certificate.peerFromTransport
and Certificate.hostFromTransport
which checks for incompatible handle types and null certificates and raises the appropriate exception or returns the appropriate certificate object.
Caclulate the acceptable list of ciphers from the ciphers we want and the ciphers we have support for.
Parameters | |
wantedtuple of OpenSSLCipher | The ciphers we want to use. |
availabletuple of OpenSSLCipher | The ciphers we have available to use. |
Returns | |
tuple of OpenSSLCipher | Undocumented |
Determine if service_identity is installed. If so, use it. If not, use simplistic and incorrect checking as implemented in simpleVerifyHostname
.
Returns | |
tuple | 2-tuple of (verify_hostname, VerificationError) |
Called to set up the OpenSSL.SSL.Context
for doing NPN and/or ALPN negotiation.
Parameters | |
context:OpenSSL.SSL.Context | The context which is set up. |
acceptablelist of bytes | The protocols this peer is willing to speak after the TLS negotiation has completed, advertised over both ALPN and NPN. If this argument is specified, and no overlap can be found with the other peer, the connection will fail to be established. If the remote peer does not offer NPN or ALPN, the connection will be established, but no protocol wil be negotiated. Protocols earlier in the list are preferred over those later in the list. |
Wrap up an info_callback for pyOpenSSL so that if something goes wrong the error is immediately logged and the connection is dropped if possible.
This wrapper exists because some versions of pyOpenSSL don't handle errors from callbacks at all, and those which do write tracebacks directly to stderr rather than to a supplied logging system. This reports unexpected errors to the Twisted logging system.
Also, this terminates the connection immediately if possible because if you've got bugs in your verification logic it's much safer to just give up.
Parameters | |
wrapped:callable | A valid info_callback for pyOpenSSL. |
Returns | |
callable | A valid info_callback for pyOpenSSL that handles any errors in wrapped. |