- Copy TLS 1.3 traffic secrets and DTLS 1.3 epoch/cipher state to the
write-dup side in DupSSL so key updates can be performed.
- Delegate KeyUpdate responses from the read side to the write side via
the shared WriteDup struct, for both peer-initiated and local key
updates.
- Delegate DTLS 1.3 ACK sending from the read side to the write side.
- Track DTLS 1.3 KeyUpdate ACKs: write side records the in-flight
KeyUpdate epoch/seq, read side sets keyUpdateAcked when the matching
ACK arrives.
- Delegate post-handshake certificate authentication (CertificateRequest
processing) from the read side to the write side, transferring
transcript hashes, cert context, and signature parameters.
- Reset prevSent/plainSz to prevent stale values from SendData to think
that data was already sent.
- Refactor FreeHandshakeHashes into Free_HS_Hashes for reuse.
- Move DTLS 1.3 epoch initialization earlier in InitSSL so the
write-dup early-return path has valid epoch state.
- Add tests for write dup with all protocol versions, key update,
post-handshake auth, and WANT_WRITE recovery.
- Add --enable-all --enable-writedup to CI os-check matrix.
* Enable ML-KEM by default in build systems (autoconf and CMake)
* Only allow three to-be-standardized hybrid PQ/T combinations by
default
* Use X25519MLKEM768 as the default KeyShare in the ClientHello (if user
does not override that). When Curve25519 is disabled, then either
WOLFSSL_SECP384R1MLKEM1024 or WOLFSSL_SECP256R1MLKEM768 is used as
default depending on the ECC configuration
* Disable standalone ML-KEM in supported groups by default (enable with
--enable-tls-mlkem-standalone)
* Disable extra OQS-based hybrid PQ/T curves by default and gate
behind --enable-experimental (enable with --enable-extra-pqc-hybrids)
* Reorder the SupportedGroups extension to reflect the preferences
* Reorder the preferredGroup array to also reflect the same preferences
* Add async support for ML-KEM hybrids
- Add a GitHub Actions workflow to automate testing of Python integration
- Implement Blake2b and Blake2s hash functions into the EVP API.
- Improve OpenSSL compatibility by standardizing ASN.1 encoding for
serial numbers and registered IDs, streamlining cipher stack management, and optimizing stack node copying.
- Enforce maximum fragment size during data transmission to ensure proper TLS/DTLS record fragmentation.
### `wolfssl/internal.h`
- **`InternalTicket` struct gains a flexible array member**: A new `peerCert[]` field (with a preceding `peerCertLen[2]`) is added to `InternalTicket`. This allows the peer's DER-encoded certificate to be stored directly inside the session ticket.
- **`ExternalTicket` struct becomes variable-length**: The `enc_ticket` field is changed from a fixed-size array to a flexible array member (`byte enc_ticket[]`). The `mac` field is removed from the struct — the MAC is now placed dynamically after the encrypted data in `enc_ticket`.
### `src/internal.c`
- The `GetRecordHeader` function now only adds `MAX_COMP_EXTRA` to the maximum allowed record size when `ssl->options.usingCompression` is true, tightening the length validation. The max fragment length extension check is now much stricter.
- **Peer certificate is serialized into the ticket**: During ticket creation, the code attempts to find the peer certificate from `ssl->peerCert` or from `ssl->session->chain` (fallback). If found and within `MAX_TICKET_PEER_CERT_SZ`, it's copied into `it->peerCert`. DTLS is explicitly excluded (peer cert length set to 0) to keep ticket size small for MTU constraints. If `HAVE_MAX_FRAGMENT` is defined and max fragment is not `MAX_RECORD_SIZE` for TLS 1.3, the cert is also skipped since `SendTls13NewSessionTicket` doesn't support fragmentation yet.
- **Peer certificate restoration from ticket**: On successful ticket decryption, if the ticket contains a peer certificate (`peerCertLen > 0`), it is decoded back into `ssl->peerCert` via `ParseCertRelative`/`CopyDecodedToX509`, and also added to `ssl->session->chain` via `AddSessionCertToChain`.
- The `CLEAR_ASN_NO_PEM_HEADER_ERROR` macro was rewritten to loop and remove all consecutive PEM no-start-line errors (not just the last one), wrapped in a `do { ... } while(0)` for safety.
- The `SendTicket` function is simplified to use `SendHandshakeMsg` to support fragmenting the larger ticket.
---
### `src/x509.c`
- `loadX509orX509REQFromPemBio` now accepts `TRUSTED_CERT_TYPE` in addition to `CERT_TYPE` and `CERTREQ_TYPE`.
- **Streaming BIO support**: When `wolfSSL_BIO_get_len()` returns ≤ 0 (e.g., pipes/FIFOs), the function no longer returns an error. Instead, it sets an initial buffer of `MAX_X509_SIZE` and dynamically grows (doubling) up to `MAX_BIO_READ_BUFFER` (`MAX_X509_SIZE * 16`) as data is read byte-by-byte.
- **Alternate footer detection**: For `TRUSTED_CERT_TYPE`, the PEM reader also checks for the regular `CERT_TYPE` footer (`-----END CERTIFICATE-----`) in addition to the trusted cert footer (`-----END TRUSTED CERTIFICATE-----`), so it can parse either format.
- Removed two lines that set `cert->srcIdx` to `SIGALGO_SEQ` offset. This makes `cert->srcIdx` reflect the end of parsed certificate data. This is used by `loadX509orX509REQFromBuffer` to detect where auxiliary trust data begins in trusted certificates.
---
### `src/ssl_sk.c`
- Added a `STACK_TYPE_X509_CRL` case to `wolfssl_sk_dup_data` that calls `wolfSSL_X509_CRL_dup` for deep-copying CRL stack elements. Previously, `STACK_TYPE_X509_CRL` fell through to the unsupported default case.
---
### `wolfssl/openssl/ssl.h`
- `sk_X509_dup` now maps to `wolfSSL_shallow_sk_dup` (was `wolfSSL_sk_dup`/deep copy). This matches OpenSSL's behavior where `sk_X509_dup` does a shallow copy.
- `sk_SSL_CIPHER_dup` similarly changed to `wolfSSL_shallow_sk_dup`.
---
### `src/ssl_api_cert.c`
- When `ssl->ourCert` is `NULL` and the SSL owns its cert, the function now checks if `ssl->ctx->ourCert` points to the same certificate (by comparing DER buffers). If so, it returns the ctx's `X509` pointer directly. This maintains pointer compatibility for applications (like nginx OCSP stapling) that use the `X509*` from `SSL_CTX_use_certificate` as a lookup key.
### `src/bio.c`
- When `wolfssl_file_len` returns `WOLFSSL_BAD_FILETYPE` (now returned for pipes/FIFOs), `wolfSSL_BIO_get_len` treats it as length 0 instead of propagating the error.
---
### `tests/test-maxfrag.conf` and `tests/test-maxfrag-dtls.conf`
- Removed `DHE-RSA-AES256-GCM-SHA384` test entries because the ClientKeyExchange doesn't fit in the selected max fragment length.
Add missing bounds validation in wolfSSL_select_next_proto. Three
issues fixed:
1. Outer loop: no check that length byte + position stays within inLen,
allowing XMEMCMP to read past the server protocol list buffer.
2. Inner loop: same missing check for clientNames/clientLen boundary.
3. No-overlap fallback unconditionally dereferences clientNames[0] even
when clientLen is 0, and returns an outLen that may exceed the buffer.
Also reject zero-length protocol entries (invalid per RFC 7301) to
prevent infinite loops.
Add unit test test_wolfSSL_select_next_proto with 8 cases covering NULL
params, normal match, no overlap, malformed length overruns, zero-length
entries, and empty client lists.
This is used by the OpenSSL compatibility layer. If either parameter was
NULL, it would return as a match. We should return a non-match instead.
OpenSSL itself has no safety checks here.
## Summary
- Add non-blocking (incremental) Curve25519 key generation and shared secret via `WC_X25519_NONBLOCK`, modeled after the existing ECC non-blocking pattern (`WC_ECC_NONBLOCK`)
- Implement `curve25519_nb()` and `fe_inv__distinct_nb()` in `fe_low_mem.c` as state-machine variants that return `FP_WOULDBLOCK` to yield after each field multiply
- Add `wc_curve25519_set_nonblock()` API to attach/detach non-blocking context to a key
- Integrate X25519 non-blocking with TLS 1.2/1.3 key share generation and shared secret in `tls.c` and `internal.c` (behind `WC_X25519_NONBLOCK && WOLFSSL_ASYNC_CRYPT_SW`)
- Add `--enable-curve25519=nonblock` configure option (auto-enables `--enable-asynccrypt` and `--enable-asynccrypt-sw`)
- Add X25519 async software dispatch cases in `async.c` and types in `async.h`
- Fix async guard in `curve25519.c` to require `WOLFSSL_ASYNC_CRYPT_SW` (matching other algorithms)
- Overhaul `examples/async/` client/server: non-blocking I/O via `WOLFSSL_USER_IO`, standalone `Makefile`, X25519/ECC mode selection, CI-friendly ready-file sync
- Add `examples/configs/user_settings_curve25519nonblock.h` and CI coverage in `os-check.yml` and new `async-examples.yml` workflow
- Add wolfcrypt test and API test coverage for X25519 non-blocking
Move EC and RSA code out of pk.c into separate file.
Move out of ssl.c into separate files:
- Certificate APIs
- CRL/OCSP APIs
- Public Key APIs
- ECH
Internal Certificate Manager APIs pulled out into ssl_certman.c.
d2i and i2d WOLFSSL_EVP_PKEY APIs pulled out into evp_pk.c.
Fix formatting.
Mostly combinations of NO_WOLFSSL_CLIENT, NO_WOLFSSL_SERVER and
WOLFSSL_NO_CLIENT_AUTH were failing.
Added configurations to CI loop.
wc_AesGcmDecryptFinal: use WC_AES_BLOCK_SIZE to satisfy compiler.
* More PQC configurations
* More CMake setups
* Fix various bugs uncovered by these tests
Added some missing feature additions to CMake to make the example
`user_settings_all.` config file work for the CI test.
When both TLS 1.3 and Brainpool curves are enabled, three new groups can
be used for the ECDHE key exchange according to RFC 8734:
* WOLFSSL_ECC_BRAINPOOLP256R1TLS13 (31)
* WOLFSSL_ECC_BRAINPOOLP384R1TLS13 (32)
* WOLFSSL_ECC_BRAINPOOLP512R1TLS13 (33)
Also ensure that the existing TLS 1.2 curves are sent properly.
The TLS client application is updated to support handshakes via
Brainpool curves using the new argument "--bpKs".
When wolfSSL_SetVersion() is called to set a specific TLS version,
the downgrade flag is now set to 0. This causes wolfSSL_parse_cipher_list()
to no longer preserve cipher suites from the other TLS version group.
Previously, when using SSLv23 method and setting cipher suites for only
one TLS version (e.g., TLS 1.2), the library would preserve any existing
cipher suites from the other version (e.g., TLS 1.3) for OpenSSL API
compatibility. With this change, if a specific version is set via
wolfSSL_SetVersion(), only the cipher suites for that version are kept.
Juliusz Sosinowicz
Daniel Pouzzner
David Garske
JacobBarthelmeh
Paul Adelsbach
Tobias Frauenschläger
Chris Conlon
Eric Blankenhorn
Sean Parkinson
Andrew Hutchings
Kareem
Anthony Hu