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transport layer need to generate additional application specific
key material. One way to generate such material is to use the TLS
PRF and key material from the TLS session itself.
This change makes it possible to use a TLS sessions PRF either with
the session internal or caller supplied key material to generate
additional key material.
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Background from erlang-questions:
> We use this test suite to verify our PKIX-path-validation code,
> granted we do not yet support CRL-handling but that is on its
> way. Our verify_fun will let you work around the problem that it
> is not yet supported. (Not so fun for you perhaps but a possible
> solution for now).
this is unfortunately not the case since for versions that contain
commit 4dbf3c9e4ae7cfd19b247353369166d31b8f15e5 (it is in R14B04 and
R15B) the documented behaviour (verify_fun will be called for every
certificate) is broken: the verify_fun will only be called, if the
certificate contains unknown extensions.
it is therefore not useful as a CRL workaround (anymore).
best regards
Stefan Grundmann
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The code is refactored and improved to make it easier to insert the
1/n-1 splitting countermeasure Rizzo/Duong-Beast that is really done
in one function clause in ssl:record_split_bin/3
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ets:next needs an explicit safe_fixtable call to be safe, we
rather use ets:foldl and throw to get out of it when we find the
correct entry.
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implementations to ignore data following the ClientHello (i.e.,
extensions) if they do not understand them.
Data not following the protocol format for extensions will be
ignored by the last dec_hello_extensions-clause.
OTP-8596
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* ia/ssl/use-inet-and-gen-specs:
Use inet and gen_* dialyzer specs
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We want the certificate table to be handled the same way as the
session table and not have a global name, so that we may easier
create a separate ssl-manager to handle erlang distribution over ssl.
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When a verify fun is supplied, it should not be called to verify
the extended_key_usage-extension when it is already verified
by the ssl_certificate:validate_extension/2
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Data to sign and verify should be inputed as binaries.
Also cleaned up and moved some dialyzer specs.
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Also changed alert to BAD_RECORD_MAC as:
"differentiating between bad_record_mac and decryption_failed alerts
may permit certain attacks against CBC mode as used in TLS
[CBCATT]. It is preferable to uniformly use the bad_record_mac
alert to hide the specific type of the error."
Also cleaned up the code and changed a few other alert reasons in
according to alert descriptions in the TLS RFC 4346. And added function
terminate_alert/3 so that we can differentiate between a crash
in ssl (a bug in our code) and a crash in the application using ssl.
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* ia/ssl/certificate-verify/wrong-key-method/OTP-8897:
Correct handling of client certificate verify message
Conflicts:
lib/ssl/src/ssl_handshake.erl
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When checking the client certificate verify message the server used
the wrong algorithm identifier to determine the signing algorithm,
causing a function clause error in the public_key application when the
key-exchange algorithm and the public key algorithm of the client
certificate happen to differ.
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For testing purposes ssl now also support some anonymous cipher suites
when explicitly configured to do so.
Also moved session cache tests to its own suite, so that timeout
of end_per_testcase when the mnesia is used as session cache will
not affect other test cases.
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* ia/ssl-and-public_key/backwards-compatibility/OTP-8858:
Backwards compatibility
Conflicts:
lib/ssl/src/ssl_certificate_db.erl
Use short INFO-message. Debugging information can be fairly
easily recreated so we do not want to clutter the logs.
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Changed implementation to retain backwards compatibility for old
option {verify, 0} that shall be equivalent to {verify, verify_none},
also separate the cases unknown CA and selfsigned peer cert, and
restored return value of deprecated function public_key:pem_to_der/1.
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Changed the behavior of the verify_fun option so that
the application can be responsible for handling path validation
errors even on the server side. Also replaced the not yet
documented validate_extensions_fun to be handled by the
verify_fun instead.
If the verify callback fun returns {fail, Reason}, the verification process is
immediately stopped and an alert is sent to the peer and the TLS/SSL
handshake is terminated. If the verify callback fun returns {valid,
UserState}, the verification process is continued. If the verify callback
fun always returns {valid, UserState}, the TLS/SSL handshake will not be
terminated with respect to verification failures and the connection
will be established. The verify callback fun will also be
able to verify application specific extensions.
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Handling of unkown CA certificats was changed in ssl and
public_key to work as intended.
In the process of doing this some test cases has been corrected as
they where wrong but happened to work together with the
incorrect unknown CA handling.
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If hello and client_key_exchange message is sent together in
the same packet, ssl can't handle it and closes the connection.
Also fixed compiler warning.
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* ia/public_key_api/OTP-8722:
Revise the public_key API
Resolved, version is now 0.8.
Conflicts:
lib/public_key/vsn.mk
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Cleaned up and documented the public_key API to
make it useful for general use.
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in client hello message when a client certificate is used
The client hello message now always include ALL available cipher suites
(or those specified by the ciphers option). Previous implementation would
filter them based on the client certificate key usage extension (such
filtering only makes sense for the server certificate).
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instead of causing a case-clause.
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Started to improve code documentation by using -spec directive, and
some small refactorings to avoid ugly code.
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Ssl has now switched default implementation and removed deprecated
certificate handling. All certificate handling is done by the public_key
application.
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New ssl now support client/server-certificates signed by dsa keys.
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wrong shell!
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New ssl now supports secure renegotiation as described by RFC 5746.
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New ssl now properly handles ssl renegotiation, and initiates a
renegotiation if ssl/ltls-sequence numbers comes close to the max value.
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* dgud/ssl-patches-from-Wil:
Added a public_key:pkix_transform/2 instead and used it from ssl.
Minor code cleanup
new_ssl fix session reuse
Code cleanup
Send CA list during Certificate Request in new_ssl
OTP-8372 Fixed session reuse (in new_ssl), thanks Wil Tan.
Send CA list during Certificate Request (in new_ssl) , thanks Wil
Tan.
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When requesting for client certificate, an SSL/TLS server may send a
list of the distinguished names of acceptable certificate authorities.
OpenSSL does this by default.
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