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We want to share more alert and application data handling code.
Some of the application data handling code, packet handling,
will not be relevant for dtls, but this code can be excluded from dtls
by options checking.
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ssl_handshake:update_handshake_history
This proably a much bigger problem for DTLS than TLS, but should be
disabled for both unless explicitly configured for TLS.
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The flight concept was introduced by DTLS (RFC 4347) to optimize
the packing of DTLS records into UDP packets. This change
implments the flight concept in the the generic SSL connection
logic and add the queue logic to the TLS and DTLS stack.
The DTLS required resend handling is not implemented yet.
While the flight handling is only required for DTSL, it turns
out that the same mechanism can be usefull to TCP based TLS as
well.
With the current scheme each TLS record will be mapped into a
separate TCP frame. This causes more TCP frames to be generate
that necessary. On fast network this will have no impact, but
reducing the number of frames and thereby the number of
round trips can result in significant speedups on slow and
unreliable networks.
Conflicts:
lib/ssl/src/tls_connection.erl
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ssl servers can recognize sslv2 client hellos to interop with clients
that support higher version of SSL/TLS but also offers sslv2
Conflicts:
lib/ssl/src/tls_connection.erl
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Some legacy TLS 1.0 software does not tolerate the 1/n-1 content
split BEAST mitigation technique. This commit adds a beast_mitigation
SSL option (defaulting to one_n_minus_one) to select or disable the
BEAST mitigation technique.
Valid option values are (one_n_minus_one | zero_n | disabled).
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Also reduce timing issues in tests
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* henrik/update-copyrightyear:
update copyright-year
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In TLS-1.2 The signature algorithm and the hash function algorithm
used to produce the digest that is used when creating the digital signature
may be negotiated through the signature algorithm extension RFC 5246.
We want to make these algorithm pairs configurable.
In connections using lower versions of TLS these algorithms are
implicit defined and can not be negotiated or configured.
DTLS is updated to not cause dialyzer errors, but needs to get a real
implementation later.
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willing to support
Refactor highest_protocol_version so that code is symmetrical with lowest_protocol_version. For clarity and possible future use cases of highest_protocol_version/2
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Add possibility to downgrade an SSL/TLS connection to a tcp connection,
and give back the socket control to a user process.
Add application setting to be able to change fatal alert shutdown
timeout, also shorten the default timeout. The fatal alert timeout is
the number of milliseconds between sending of a fatal alert and
closing the connection. Waiting a little while improves the
peers chances to properly receiving the alert so it may
shutdown gracefully.
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* ferd/deny-client-renegotiation:
Add disable client-initiated renegotiation option
Conflicts:
lib/ssl/doc/src/ssl.xml
lib/ssl/src/ssl.erl
OTP-12815
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Client-initiated renegotiation is more costly for the server than the
client, and this feature can be abused in denial of service attempts.
Although the ssl application already takes counter-measure for these
(via cooldown periods between renegotiations), it can be useful to
disable the feature entirely.
This patch adds the `{client_renegotiation, boolean()}' option to the
server-side of the SSL application (defaulting to `true' to be
compatible with the current behaviour).
The option disables the ability to do any renegotiation at all in the
protocol's state, reusing the existing denial code, but without opening
the code path that sets up a timed message to eventually reopen it up.
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Dialyzer warned about the incorrect match of Packets. Code
was refactored and the problem avoided in the process.
Dialyzer warned that the empty tuple is not a function as the contract
said it should be. Changed the handling of the sni_fun default value to be
undefined and added it to the contract.
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The newly added function sni_fun allows dynamic update of SSL options
like keys and certificates depending on different SNI hostname, rather
than a predefined rules of SSL options.
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This commit adds support for RFC7301, application-layer protocol
negotiation. ALPN is the standard based approach to the NPN
extension, and is required for HTTP/2.
ALPN lives side by side with NPN and provides an equivalent
feature but in this case it is the server that decides what
protocol to use, not the client.
When both ALPN and NPN are sent by a client, and the server is
configured with both ALPN and NPN options, ALPN will always
take precedence. This behavior can also be found in the OpenSSL
implementation of ALPN.
ALPN and NPN share the ssl:negotiated_protocol/1 function for
retrieving the negotiated protocol. The previously existing
function ssl:negotiated_next_protocol/1 still exists, but has
been deprecated and removed from the documentation.
The tests against OpenSSL require OpenSSL version 1.0.2+.
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disable option
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disable option
Conflicts:
lib/ssl/src/ssl_cipher.erl
lib/ssl/src/ssl_record.erl
lib/ssl/src/tls_record.erl
lib/ssl/test/ssl_cipher_SUITE.erl
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crashes.
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If a client sends some garbage in ssl record instead of
valid fragment, server crashes with function_clause while
receiving next record from client.
This patch makes server raise handshake failure instead of
crashing and exposing internal state to user code.
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Negotiated version is now always passed to ssl_handshake:select_hashsign
because ssl_handshake:select_cert_hashsign has different rsa defaults on
tlsv1.2 and older versions.
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Generalize last warning alert function clause
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The server code erroneously took the list of curves supported by the
client from it's own hello extension, effectively breaking curve
selection all together.
Also the default fallback secp256k1 curve is not supported by
all clients. secp256r1 is recommended as part of the NIST Suite B
cryptographic suites. The chances are much better that all clients
support it, so use that as fallback.
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New design : ssl - Main
tls - Reflect tls specific semantics
dtls - Reflect dtls specific semantics
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Also the server should only send ECC point formats extension not ECC curve
extension.
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Common functions will be located in ssl_handshake.erl while
specific functions will be located in tls_handshake.erl and dtls_handshake.erl
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with proper defaults
Added ssl_ECC_SUITE
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relative to the module name of the ssl_manager.
This can be beneficial when making tools that rename modules for internal
processing in the tool.
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