RFC7250 (RPK) support

Add support for the RFC7250 certificate-type extensions.
Alows the use of only private keys for connection (i.e. certs not needed).

Add APIs
Add unit t

RFC7250 (RPK) support

Add support for the RFC7250 certificate-type extensions.
Alows the use of only private keys for connection (i.e. certs not needed).

Add APIs
Add unit tests
Add documentation
Add s_client/s_server support

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18185)

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Added `CERTIFICATE_VERIFY_MAX_LENGTH` constant

- Set `CERTIFICATE_VERIFY_MAX_LENGTH` to 65539
(2 bytes for the algorithm identifier + 2 bytes of signature length
+ 65535 bytes o

Added `CERTIFICATE_VERIFY_MAX_LENGTH` constant

- Set `CERTIFICATE_VERIFY_MAX_LENGTH` to 65539
(2 bytes for the algorithm identifier + 2 bytes of signature length
+ 65535 bytes of signature)
- Changed `SSL3_RT_MAX_PLAIN_LENGTH` to `CERTIFICATE_VERIFY_MAX_LENGTH`
in `statem_srvr.c` and `statem_clnt.c`

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20486)

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Add support for compressed certificates (RFC8879)

* Compressed Certificate extension (server/client)
* Server certificates (send/receive)
* Client certificate (send/receive)

Add support for compressed certificates (RFC8879)

* Compressed Certificate extension (server/client)
* Server certificates (send/receive)
* Client certificate (send/receive)

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18186)

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Test TLS extension ordering

Adding extensions is fragile, with the TLSEXT_TYPE entry needing to be
located at TLSEXT_IDX in the array.

This adds a test to ensure extensions are

Test TLS extension ordering

Adding extensions is fragile, with the TLSEXT_TYPE entry needing to be
located at TLSEXT_IDX in the array.

This adds a test to ensure extensions are in the correct order.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19269)

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Use an enum for the return value from a construction function

Construction return values are no longer boolean but can return 3 different
values, so we use an enum to represent them.

Use an enum for the return value from a construction function

Construction return values are no longer boolean but can return 3 different
values, so we use an enum to represent them.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18990)

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SSL object refactoring using SSL_CONNECTION object

Make the SSL object polymorphic based on whether this is
a traditional SSL connection, QUIC connection, or later
to be implemented

SSL object refactoring using SSL_CONNECTION object

Make the SSL object polymorphic based on whether this is
a traditional SSL connection, QUIC connection, or later
to be implemented a QUIC stream.

It requires adding if after every SSL_CONNECTION_FROM_SSL() call
which itself has to be added to almost every public SSL_ API call.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18612)

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Update copyright year

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Release: yes

Delete unused param about get_construct_message_f

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/open

Delete unused param about get_construct_message_f

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17385)

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Avoid "excessive message size" for session tickets

We received a report of an "excessive message size" for a received
session ticket. Our maximum size was significantly less than the the

Avoid "excessive message size" for session tickets

We received a report of an "excessive message size" for a received
session ticket. Our maximum size was significantly less than the theoretical
maximum. The server may put any data it likes in the session ticket
including (for example) the full certificate chain so we should be able to
handle longer tickets. Update the value to the maximum allowed by the spec.

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15877)

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Defer Finished MAC handling until after state transition

In TLS we process received messages like this:

1) Read Message Header
2) Validate and transition state based on received

Defer Finished MAC handling until after state transition

In TLS we process received messages like this:

1) Read Message Header
2) Validate and transition state based on received message type
3) Read Message Body
4) Process Message

In DTLS we read messages like this:

1) Read Message Header and Body
2) Validate and transition state based on received message type
3) Process Message

The difference is because of the stream vs datagram semantics of the
underlying transport.

In both TLS and DTLS we were doing finished MAC processing as part of
reading the message body. This means that in DTLS this was occurring
*before* the state transition has been validated. A crash was occurring
in DTLS if a Finished message was sent in an invalid state due to
assumptions in the code that certain variables would have been setup by
the time a Finished message arrives.

To avoid this problem we shift the finished MAC processing to be after
the state transition in DTLS.

Thanks to github user @bathooman for reporting this issue.

Fixes #14906

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14930)

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Add ossl_gost symbols

Partial fix for #12964

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14473)

Remove OPENSSL_NO_EC guards from libssl

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13916)

Update copyright year

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13999)

TLS client: allow cert verify callback return -1 for SSL_ERROR_WANT_RETRY_VERIFY

The client-side cert verification callback function may not only return
as usual for success or 0 for fai

TLS client: allow cert verify callback return -1 for SSL_ERROR_WANT_RETRY_VERIFY

The client-side cert verification callback function may not only return
as usual for success or 0 for failure, but also -1,
typically on failure verifying the server certificate.
This makes the handshake suspend and return control to the calling application
with SSL_ERROR_WANT_RETRY_VERIFY.
The app can for instance fetch further certificates or cert status information
needed for the verification.
Calling SSL_connect() again resumes the connection attempt
by retrying the server certificate verification step.
This process may even be repeated if need be.

The core implementation of the feature is in ssl/statem/statem_clnt.c,
splitting tls_process_server_certificate() into a preparation step
that just copies the certificates received from the server to s->session->peer_chain
(rather than having them in a local variable at first) and returns to the state machine,
and a post-processing step in tls_post_process_server_certificate() that can be repeated:
Try verifying the current contents of s->session->peer_chain basically as before,
but give the verification callback function the chance to pause connecting and
make the TLS state machine later call tls_post_process_server_certificate() again.
Otherwise processing continues as usual.

The documentation of the new feature is added to SSL_CTX_set_cert_verify_callback.pod
and SSL_want.pod.

This adds two tests:
* A generic test in test/helpers/handshake.c
on the usability of the new server cert verification retry feature.
It is triggered via test/ssl-tests/03-custom_verify.cnf.in (while the bulky auto-
generated changes to test/ssl-tests/03-custom_verify.cnf can be basically ignored).
* A test in test/sslapitest.c that demonstrates the effectiveness of the approach
for augmenting the cert chain provided by the server in between SSL_connect() calls.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13906)

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Update SERVER_HELLO_MAX_LENGTH

Update constant to maximum permitted by RFC 8446

Fixes #13868

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt

Update SERVER_HELLO_MAX_LENGTH

Update constant to maximum permitted by RFC 8446

Fixes #13868

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13874)

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Update copyright year

Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/12043)

New Russian TLS 1.2 implementation

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11442)

Reorganize local header files

Apart from public and internal header files, there is a third type called
local header files, which are located next to source files in the source
direc

Reorganize local header files

Apart from public and internal header files, there is a third type called
local header files, which are located next to source files in the source
directory. Currently, they have different suffixes like

'*_lcl.h', '*_local.h', or '*_int.h'

This commit changes the different suffixes to '*_local.h' uniformly.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9333)

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