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The link should be between the connection process and the tls_sender
process. But the start of the tls_sender process needs to be done
by the process that also starts the connection process in order to
correctly create the opaque #ssl_socket{}.
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If the peer sends an incomplete chain that we can reconstruct with
our known CA-certs it will be accepted.
We will assume that the peer honors the protocol and sends an orded
chain, however if validation fails we will try to order the chain in
case it was unorded. Will also handle that extraneous cert where present.
See Note form RFC 8446
Note: Prior to TLS 1.3, "certificate_list" ordering required each
certificate to certify the one immediately preceding it; however,
some implementations allowed some flexibility. Servers sometimes
send both a current and deprecated intermediate for transitional
purposes, and others are simply configured incorrectly, but these
cases can nonetheless be validated properly. For maximum
compatibility, all implementations SHOULD be prepared to handle
potentially extraneous certificates and arbitrary orderings from any
TLS version, with the exception of the end-entity certificate which
MUST be first.
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Before only some PSK suites would be correctly negotiated and most PSK
ciphers suites would fail the connection.
PSK cipher suites are anonymous in the sense that they do not use
certificates except for rsa_psk.
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* ingela/ssl/send-recv-dead-lock/ERL-622:
ssl: Improve close handling
ssl: Adopt distribution over TLS to use new sender process
ssl: Add new sender process for TLS state machine
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* hans/ssl/dialyzer_crypto_typed/OTP-15271:
ssl: Fix dialyzer errors detected when crypto.erl is typed
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We want to make sure that the sender process that may get stuck in
prim_inet:send will die if the tls_connection process is
terminated. And we also like to make sure that it terminates as
gracefully as possible. So when the tls_connection process dies it
spawns a killer process that will brutaly kill the sender if it is
unresponsive and does not terminate due to its monitor of the
tls_connetion process triggering.
When the sender process also acts as distribution controller it
may also have other processess that it is linked with that it
should bring down or that could bring the connection down.
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Separate sending and receiving when using TCP as transport
as prim_inet:send may block which in turn may result
in a deadlock between two Erlang processes communicating over
TLS, this is especially likely to happen when running Erlang distribution
over TLS.
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* maint-21:
Updated OTP version
Prepare release
Updated the engine load functionality
inets: Prepare for release
inets: Use status code 501 when no mod_* handles the request
ssl: Prepare for release
ssl: Make sure that a correct cipher suite is selected
ssl: Make sure that a correct cipher suite is selected
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The conversion code for different representations of cipher suites
is long an repetitive. We want to hide it in a module that does not
have other functions that we like to look at.
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When starting to implement DTLS, it was assumed that the APIs for TLS and
DTLS would differ more. This assumption turned out to be wrong.
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Modernized example
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* ingela/ssl/ERL-668/improve-err-msg/OTP-15234:
ssl: Improve error message
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* ingela/ssl/ERL-686/OTP-15224:
ssl: Error handling improvment
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* maint-20:
Updated OTP version
Update release notes
Update version numbers
crypto: Fix crash in compute_key(ecdh, ...) on badarg
Relax add_table_copy restriction
Fixed #Ref ordering bug
Test #Ref ordering in lists and ets
Do NOT disc_load from ram_copies when master_node is set
ssl: Make sure that a correct cipher suite is selected
ssl: Correct handling of empty server SNI extension
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* ingela/ssl/empty-sni/OTP-15168:
ssl: Correct handling of empty server SNI extension
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* ingela/maint/ssl/ECC/ERIERL-210/OTP-15203:
ssl: Make sure that a correct cipher suite is selected
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The keyexchange ECDHE-RSA requires an RSA-keyed server cert
(corresponding for ECDHE-ECDSA), the code did not assert this
resulting in that a incorrect cipher suite could be selected.
Alas test code was also wrong hiding the error.
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The keyexchange ECDHE-RSA requires an RSA-keyed server cert
(corresponding for ECDHE-ECDSA), the code did not assert this
resulting in that a incorrect cipher suite could be selected.
Alas test code was also wrong hiding the error.
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Transport accepted sockets that are in the error state, was not closed
properly.
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The keyexchange ECDHE-RSA requires an RSA-keyed server cert
(corresponding for ECDHE-ECDSA), the code did not assert this
resulting in that a incorrect cipher suite could be selected.
Alas test code was also wrong hiding the error.
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* maint-20:
Updated OTP version
Prepare release
ssl: Engine key trumps certfile option
inets: Prepare for release
inets: Improve error handling
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* ingela/ssl/engine-vs-certfile/ERLERL-211/OTP-15193:
ssl: Engine key trumps certfile option
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IngelaAndin/ingela/ssl/unexpected-call/ERL-664/OTP-15174
ssl: Improve error handling
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Conflicts:
lib/ssl/test/ssl_basic_SUITE.erl
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Conflicts:
lib/ssl/test/ssl_ECC_SUITE.erl
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Failing to recognize psk as an anonymous key exchange would fail the connection
when trying to decode an undefined certificate.
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The Key Usage extension is described in section 4.2.1.3 of X.509, with the following possible flags:
KeyUsage ::= BIT STRING {
digitalSignature (0),
nonRepudiation (1), -- recent editions of X.509 have
-- renamed this bit to contentCommitment
keyEncipherment (2),
dataEncipherment (3),
keyAgreement (4),
keyCertSign (5),
cRLSign (6),
encipherOnly (7),
decipherOnly (8) }
In SSL/TLS, when the server certificate contains a RSA key, then:
either a DHE or ECDHE cipher suite is used, in which case the RSA key
is used for a signature (see section 7.4.3 of RFC 5246: the "Server
Key Exchange" message); this exercises the digitalSignature key usage;
or "plain RSA" is used, with a random value (the 48-byte pre-master
secret) being encrypted by the client with the server's public key
(see section 7.4.7.1 of RFC 5246); this is right in the definition of
the keyEncipherment key usage flag.
dataEncipherment does not apply, because what is encrypted is not
directly meaningful data, but a value which is mostly generated
randomly and used to derive symmetric keys. keyAgreement does not
apply either, because that one is for key agreement algorithms which
are not a case of asymmetric encryption (e.g. Diffie-Hellman). The
keyAgreement usage flag would appear in a certificate which contains a
DH key, not a RSA key. nonRepudiation is not used, because whatever is
signed as part of a SSL/TLS key exchange cannot be used as proof for a
third party (there is nothing in a SSL/TLS tunnel that the client
could record and then use to convince a judge when tring to sue the
server itself; the data which is exchanged within the tunnel is not
signed by the server).
When a ECDSA key is used then "keyAgreement" flag is needed for beeing
ECDH "capable" (as opposed to ephemeral ECDHE)
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