WIP: master QUIC support #8797

This adds a compatible API for BoringSSL's QUIC support, based on the current |draft-ietf-quic-tls|. Based on BoringSSL commit 3c034b2cf386b3131f75520705491871a2e0cafe Based on BoringSSL commit c8e0f90f83b9ec38ea833deb86b5a41360b62b6a Based on BoringSSL commit 3cbb0299a28a8bd0136257251a78b91a96c5eec8 Based on BoringSSL commit cc9d935256539af2d3b7f831abf57c0d685ffd81 Based on BoringSSL commit e6eef1ca16a022e476bbaedffef044597cfc8f4b Based on BoringSSL commit 6f733791148cf8a076bf0e95498235aadbe5926d Based on BoringSSL commit 384d0eaf1930af1ebc47eda751f0c78dfcba1c03 Based on BoringSSL commit a0373182eb5cc7b81d49f434596b473c7801c942 Based on BoringSSL commit b1b76aee3cb43ce11889403c5334283d951ebd37

Create quic_change_cipher_state() that does the minimal required to generate the QUIC secrets. (e.g. encryption contexts are not initialized).

Try to reduce unneeded whitespace changes and wrap new code to 80 columns. Reword documentation to attempt to improve clarity. Add some more sanity checks and clarifying comments to the code. Update referenced I-D versions.

QUIC does not use the TLS KeyUpdate message/mechanism, and indeed it is an error to generate or receive such a message. Add the necessary checks (noting that the check for receipt should be redundant since SSL_provide_quic_data() is the only way to provide input to the TLS layer for a QUIC connection).

For now, just test that we don't generate any, since we don't really expose the mechanics for encrypting one and the QUIC API is not integrated into the TLSProxy setup.

Previously, SSL_provide_quic_data tried to handle this kind of situation, but it failed when the length of input data is less than SSL3_HM_HEADER_LENGTH. If that happens, the code might get wrong message length by reading value from out-of-bounds region.

… chunks" This reverts commit d7ddc33b323540ae2bb21327ba44f10881e6a9ce.

Make all data supplied via SSL_provide_quic_data() pass through an internal buffer, so that we can handle data supplied with arbitrary framing and only parse complete TLS records onto the list of QUIC_DATA managed by quic_input_data_head/quic_input_data_tail. This lets us remove the concept of "incomplete" QUIC_DATA structures, and the 'offset' field needed to support them. However, we've already moved the provided data onto the buffer by the time we can check for KeyUpdate messages, so defer that check to quic_get_message() (where it is adjacent to the preexisting ChangeCipherSpec check). To avoid extra memory copies, we also make the QUIC_DATA structures just store offsets into the consolidated buffer instead of having copies of the TLS handshake messages themselves.

The QUIC-TLS spec requires that TLS handshake messages do not cross encryption level boundaries, but we were not previously enforcing this.

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WIP: master QUIC support #8797

WIP: master QUIC support #8797

Commits on Jan 12, 2021