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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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ECDH suite handling did not use the EC parameters form the certs
as expected.
Conflicts:
lib/ssl/src/ssl_cipher.erl
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When test handling was corrected it was obvious that DTLS ECC handling
was not compleated.
Conflicts:
lib/ssl/src/ssl.erl
lib/ssl/test/Makefile
lib/ssl/test/ssl_ECC.erl
lib/ssl/test/ssl_ECC_SUITE.erl
lib/ssl/test/ssl_ECC_openssl_SUITE.erl
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answer to a certificate request
Solves ERL-599
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Anonymous cipher suites were broken altogether, and
there was an earlier issue where the server would send a signature
in the server key exchange if a certificate was configured, even
if an anonymous suite was actually negotiated.
Backport of PR-1729
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Cipher suite handling improvments missed to make a few changes
for AEAD to be handled correctly see ERL-568
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dumbbell/dumbbell/ssl/fix-active-once-dropped-when-handling-alert/ERL-562
ssl: Fix alert handling so that unexpected messages are logged and alerted correctly
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... in handle_common_event(), instead of passing it to
handle_own_alert() after wrapping it in a tuple with `StateName` (i.e.
`{StateName, Msg}`).
The `StateName` is passed to handle_normal_shutdown() and to
alert_user(). The latter has a clause matching it against `connection`.
Unfortunately, when the argument was in fact `{StateName, Msg}`, another
clause was executed which dropped the `active` flag value and forced it
to `false`, even if the state was actually `connection`. It meant that
later in send_or_reply(), the alert was not propagated to the user, even
though it should (`active` set to `true` or `once`).
Now that handle_common_event() always passes the actual `StateName`, the
problem is fixed.
ERL-562
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Preferably customized cipher suites will be based on the default value.
But all may be used as base and hence it will be good to
handle anonymous suites separately as they are intended for testing purposes.
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Authenticated encryption (AE) and authenticated encryption with
associated data (AEAD, variant of AE) is a form of encryption which
simultaneously provides confidentiality, integrity, and authenticity
assurances on the data.
This is more logical value then null that was used, this happened to
work as the AEAD property was derived form other data, but it is confusing!
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Stream ciphers are not valid fro DTLS
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ERL-539
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* ingela/dtls-cuddling:
dtls: Correct UDP listener cleanup
dtls: Correct return value in UDP listener initialization
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* ingela/DTLS/retransmission-timers:
dtls: Use repeat_state to make sure retransmission timer is reset
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completely deprecated operation with no effect.
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* ingela/ssl/cipher-suites/OTP-14749:
ssl: Use maps for cipher suites internally
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This is a preparation for improvements to come in option handling and
support for TLS-1.3
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* ingela/ssl/timing:
ssl: Align timing just in case
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* ingela/ssl/ERL-521/OTP-14794:
ssl: Make sure all possible data is delivered
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Also make tls code a little more direct for easier uderstanding
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This code is only relevant in version is was written in.
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When handling merging of back ported
Counter measurements for Bleichenbacher attack
a line from DTLS was accidentally lost.
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* maint-20:
Updated OTP version
Update release notes
Update version numbers
public_key: verify ip (both v4 and v6)
public_key: Added IP4 address checks to hostname_verification tests
ssl: Fix test cases to work on all test platforms
public_key: Fix dialyzer spec
ssl: Sessions must be registered with SNI if exists
ssl: Extend hostname check to fallback to checking IP-address
public_key, ssl: Handles keys so that APIs are preserved correctly
ssl: Use ?FUNCTION_NAME
ssl: Prepare for release
ssl: Countermeasurements for Bleichenbacher attack
Conflicts:
lib/public_key/doc/src/public_key.xml
lib/public_key/test/public_key_SUITE.erl
lib/public_key/test/public_key_SUITE_data/pkix_verify_hostname_subjAltName_IP.pem
lib/public_key/test/public_key_SUITE_data/verify_hostname_ip.conf
lib/ssl/src/dtls_connection.erl
lib/ssl/src/ssl_connection.erl
lib/ssl/src/ssl_handshake.erl
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'ingela/maint-20/ssl/extend-hostname-check/OTP-14632/OTP-14655/OTP-14766' into maint-20
* ingela/maint-20/ssl/extend-hostname-check/OTP-14632/OTP-14655/OTP-14766:
ssl: Fix test cases to work on all test platforms
public_key: Fix dialyzer spec
ssl: Sessions must be registered with SNI if exists
ssl: Extend hostname check to fallback to checking IP-address
public_key, ssl: Handles keys so that APIs are preserved correctly
ssl: Use ?FUNCTION_NAME
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