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* Correctly unpack client key shares.jsing2020-02-012-14/+11
| | | | | | | | Even if we're not processing/using the peer public key from the key share, we still need to unpack it in order to parse the TLS extension correctly. Resolves issues with TLSv1.3 clients talking to TLSv1.2 server. ok tb@
* Disable TLSv1.3 client while some known issues are being addressed.jsing2020-02-011-1/+3
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* Provide struct/functions for handling TLSv1.3 key shares.jsing2020-01-308-130/+299
| | | | | | | Pull out the key share handling code and provide a clean/self contained interface. This will make it easier to support groups other than X25519. ok beck@ inoguchi@ tb@
* Factor out/rewrite the ECDHE EC point key exchange code.jsing2020-01-305-173/+188
| | | | | | | | | This reduces replication between the existing TLS client/server and allows the code to soon be reused for TLSv1.3. With feedback from inoguchi@ and tb@ ok inoguchi@ tb@
* Remove dead prototypes.jsing2020-01-291-10/+1
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* If the TLSv1.3 code has not recorded an error and something already existsjsing2020-01-293-3/+9
| | | | | | | | on the error stack, refrain from pushing an 'unknown' error on the stack. This should allow libcrypto errors (including bio) to be visible, where we have nothing better to offer. ok tb@
* Remove unused stub implementation of tls13_accept(). The correcttb2020-01-291-11/+1
| | | | | | and used version is in tls13_server.c. ok inoguchi jsing
* Fix SSL_CIPHER_descriptioninoguchi2020-01-261-2/+2
| | | | ok jsing@
* When an SSL method is set, bump the max version back to that of thejsing2020-01-261-1/+10
| | | | | | | | | | incoming method if it is a client. This addresses the case where TLS_method() is used to initialise a SSL_CTX, then a TLS_client_method() is then set, resulting in TLSv1.2 being used instead of TLSv1.3. This is observable in smtpd. ok beck@
* When switching back to a legacy client or server, ensure we reset thejsing2020-01-262-2/+4
| | | | | | | | handshake function pointer. Fixes an isssue found by jca@ with OpenVPN. ok beck@ tb@
* Fix basement bug where record layer would not correctly deal withbeck2020-01-261-1/+4
| | | | | | traffic retries when not yet encrypting. ok jsing@
* Add server side support for requesting client certificates in tls 1.3beck2020-01-261-4/+173
| | | | ok jsing@
* Add client certificate support for tls 1.3beck2020-01-262-15/+149
| | | | ok jsing@
* Add sigalgs for server side to enable client certificate processingbeck2020-01-261-5/+34
| | | | | | | | in tls 1.3 Will be used in a follow on commit to enable tls1.3 client certificates ok jsing@
* Move pad and verify context into tls13_lib.cbeck2020-01-264-68/+60
| | | | ok jsing@
* Add an underbar for consistency.tb2020-01-251-2/+2
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* Revert change to certificate request check from r1.45.jsing2020-01-251-3/+3
| | | | | | This code was correct, it was the entry in the table that was incorrect. ok beck@
* Only perform the downgrade check if our max version is less than TLSv1.3.jsing2020-01-251-15/+17
| | | | | | | Issue noticed by kn@ when talking to a TLSv1.3 capable mail server, but with smtpd capping max version to TLSv1.2. ok beck@
* Preserve the transcript hash for the client finished message,beck2020-01-251-2/+3
| | | | | | and correct the message type for certificate request. ok jsing@
* Support legacy message callbacks. First step for SSL_set_msg_callback(3)tb2020-01-253-3/+40
| | | | | | support. Makes openssl s_client -msg work for handshake messages. ok beck jsing
* Correct value for SSL_TLSEXT_MSG_HRR.jsing2020-01-251-2/+2
| | | | ok beck@ tb@
* Only discard the extension block for client hello and server hellojsing2020-01-251-2/+3
| | | | | | | | | messages. TLSv1.3 messages that include extensions need a length prefixed field with zero bytes, rather than no data at all. ok beck@ tb@
* Only send an RI extension for pre-TLSv1.3 versions.jsing2020-01-251-2/+2
| | | | ok beck@
* It is possible to receive a pre-TLSv1.3 alert in response to a TLSv1.3jsing2020-01-253-4/+24
| | | | | | | | | | | | client hello. Allow pre-TLSv1.3 alerts (including warnings) to be received before the server hello message. Disallow pre-TLSv1.3 alerts as soon as we know that we are using TLSv1.3. Noticed by ajacoutot@ while connecting to www.openprinting.org. ok tb@
* Correct backwards test so that we may accept a certificate requstbeck2020-01-251-3/+3
| | | | | | from the server. ok jsing@
* Complete the initial TLSv1.3 implementation.jsing2020-01-243-14/+300
| | | | ok beck@ tb@
* Preserve the TLS transcript at additional points.jsing2020-01-241-9/+23
| | | | | | | | | This is needed for the TLSv1.3 server and will also be needed for client certificate authentication. Note that we preserve on receive but before recording the new handshake message, whereas we preserve on send after recording the new handshake message. ok tb@
* Permit 0 length writes, because openssl s_client is specialbeck2020-01-241-2/+2
| | | | ok jsing@
* Store the legacy session identifier from the ClientHello so we can actuallyjsing2020-01-241-1/+10
| | | | | | echo it. ok beck@ tb@
* Switch to encrypted records in the TLSv1.3 server.jsing2020-01-243-4/+78
| | | | | | | This adds code to perform key derivation and set the traffic keys once the ServerHello message has been sent, enabling encrypted records. ok beck@ tb@
* Enable SSL_ENC_FLAG_SIGALGS on TLSv1_3_enc_data.jsing2020-01-241-2/+2
| | | | | | This means that we actually try to process and use signature algorithms. ok beck@ tb@
* Add strings for SSL_aTLS1_3 and SSL_kTLS1_3 to SSL_CIPHER_description().jsing2020-01-241-1/+7
| | | | | | | Mkaes `openssl ciphers -v` print au and kx values for TLSv1.3 cipher suites. ok beck@ tb@
* Fix breakage in SSL_connect, SSL_accept, etc. by not propagatingbeck2020-01-243-13/+42
| | | | | | | | | new retry conditions from the record layer all the way up to the callers. Instead we catch them at the top of the record layer and retry the operations, unless we actually got a retry indicated from actual IO operations. ok jsing@ tb@
* Implement client hello processing in the TLSv1.3 server.jsing2020-01-233-10/+58
| | | | ok beck@
* Correct several issues in the current TLSv1.3 server code.jsing2020-01-231-6/+15
| | | | | | | | | | | | | Correct the parsing of the client hello support versions extension. This has one or more values, rather than just the single selected version. Allocate an SSL_SESSION - this is unused currently, but is needed as soon as we start parsing extensions. Also, pull the cipher suites list off correctly - this is u16 prefixed, not u8. ok beck@
* When certificate validation fails, we must send a DECRYPT_ERROR alertbeck2020-01-231-3/+6
| | | | | | according to RFC8446. ok jsing@
* Remove the ssl_get_message function pointer from SSL_METHOD_INTERNAL.jsing2020-01-236-47/+27
| | | | | | | | | ssl_get_message is essentially a switch between ssl3_get_message and dtls1_get_message, both only used by the legacy stack. Instead, use SSL_IS_DTLS() in ssl3_get_message to call the DTLS function when necessary. ok beck@ inoguchi@ tb@
* Implement sending client certificate requests for 1.3 serverbeck2020-01-231-1/+13
| | | | ok jsing@
* Correctly handle TLSv1.3 ciphers suites in ssl3_choose_cipher().jsing2020-01-234-5/+30
| | | | | | | | | | Currently, TLSv1.3 cipher suites are filtered out by the fact that they have authentication and key exchange algorithms that are not being set in ssl_set_cert_masks(). Fix this so that ssl3_choose_cipher() works for TLSv1.3, however we also now need to ensure that we filter out TLSv1.3 for non-TLSv1.3 and only select TLSv1.3 for TLSv1.3. ok beck@ tb@
* Build the encrypted extensions for the 1.3 serverbeck2020-01-231-2/+8
| | | | ok jsing@
* If we are building a legacy server hello, check to see if we arebeck2020-01-231-1/+20
| | | | | | | | downgrading from TLS 1.3. If we are, set the last 8 bytes of the server_random value to the required values as per RFC 8446 section 4.1.3 indicating that we deliberately meant to downgrade. ok jsing@
* Add checking int the client to check the magic values which arebeck2020-01-233-3/+30
| | | | | | | set by a 1.3 server when it downgrades to tls 1.2 or 1.1 as per RFC 8446 section 4.1.3 ok jsing@
* Add code to build and send a server hello for tls 1.3beck2020-01-231-3/+40
| | | | ok jsing@
* Save the legacy session id in the client, and enforce that it is returnedbeck2020-01-232-7/+18
| | | | | | the same from the server. ok jsing@ tb@
* Implement pending for TLSv1.3.jsing2020-01-234-6/+42
| | | | | | Makes `openssl s_client -peekaboo` work with TLSv1.3. ok beck@ tb@
* Remove lies from the SSL_pending man page, Our implementation neverbeck2020-01-231-22/+3
| | | | | | advances the record layer, it only reports internal state. ok jsing@ tb@
* Switch back to a function pointer for ssl_pending.jsing2020-01-233-14/+24
| | | | | | | This will allow the TLSv1.3 stack to provide its own implementation. Nuke a completely bogus comment from SSL_pending() whilst here. ok beck@
* Add a TLS13_IO_ALERT return value so that we can explicitly signal whenjsing2020-01-233-11/+22
| | | | | | | | | | we sent or received a fatal alert. Pull the fatal_alert check up into tls13_legacy_error(). Also, if sending an alert resulted in EOF, do not propagate this back since we do not want to signal EOF to the caller (rather we want to indicate failure). ok beck@ tb@
* Pass a CBB to TLSv1.3 send handlers.jsing2020-01-234-50/+44
| | | | | | | This avoids the need for each send handler to call tls13_handshake_msg_start() and tls13_handshake_msg_finish(). ok beck@ tb@
* Wire up the TLSv1.3 server.jsing2020-01-223-6/+182
| | | | | | | | This currently only has enough code to handle fallback to the legacy TLS stack for TLSv1.2 or earlier, however allows for further development and testing. ok beck@
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