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If a handshake message is really big it could happen that the ssl
process would hang due to failing of requesting more data from the
socket. This has been fixed.
Also added option to limit max handshake size. It has a default
value that should be big enough to handle normal usage and small
enough to mitigate DoS attacks.
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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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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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Conflicts:
lib/ssl/src/dtls_record.erl
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See RFC 6066 section 3
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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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Also phase in tls module as main API instead of ssl. To
make API clearer. As TLS is the new protocol name.
Maybe keep some API functions in ssl
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server key encoding depends to the negotiated key exchange. Before
the encoding was limited to diffie-hellman keys. This changes allows
to select the key structure to decode and verify. It also consolidates
the transport encoding of the parameters into one place.
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Types in a record where wrongly type specified, did not include
undefined. Make them comments for now, maybe we will specify internal
records with dialyzer types later, but as the other record fields are
not specified at the moment, with dialyzer types, make the code
consistent.
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more "sense" (be true to the specification).
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* http://technotes.googlecode.com/git/nextprotoneg.html
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This is also avoids triggering some bugs in OpenSSL.
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TLS 1.2 introduces changes on how signatures
are calculate and encoded. This makes the
signature handling version aware
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TLS/SSL version before 1.2 always used a MD5/SHA combination
for the handshake hashes. With TLS 1.2 the default hash is
SHA256 and it is possible to negotiate a different hash.
This change delays the calculation of the handshake
hashes until they are really needed. At that point the hash
to use should be known.
For now MD5/SHA is still hard coded.
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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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New ssl now supports secure renegotiation as described by RFC 5746.
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