Files
wolfssl/examples/async/user_settings.h
T
David Garske 4d3925d526 Add X25519 non-blocking support for key gen and shared secret
## 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
2026-02-04 21:28:52 -08:00

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C

/* user_settings.h
*
* Copyright (C) 2006-2026 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
/* Bare-metal user settings for TLS 1.3 client with WOLFSSL_USER_IO. */
#ifndef WOLFSSL_USER_SETTINGS_H
#define WOLFSSL_USER_SETTINGS_H
#define WOLFSSL_USER_IO
#define SINGLE_THREADED
#define NO_FILESYSTEM
#define WOLFSSL_IGNORE_FILE_WARN
#define HAVE_ECC
#define WC_ECC_NONBLOCK
#define WC_ECC_NONBLOCK_ONLY
#define ECC_USER_CURVES /* P256 only */
#define WOLFSSL_HAVE_SP_ECC
#define WOLFSSL_SP_SMALL
#define WOLFSSL_SP_NONBLOCK
#define WOLFSSL_SP_NO_MALLOC
#define ECC_TIMING_RESISTANT
#define HAVE_ED25519
#define HAVE_CURVE25519
#define CURVE25519_SMALL
#define ED25519_SMALL
#define WC_X25519_NONBLOCK
#define WOLFSSL_ASYNC_CRYPT
#define WOLFSSL_ASYNC_CRYPT_SW
#define WC_NO_ASYNC_THREADING
#define HAVE_WOLF_BIGINT
#define HAVE_AESGCM
#define WOLFSSL_SHA512
#define WOLFSSL_TLS13
#define HAVE_HKDF
#define HAVE_TLS_EXTENSIONS
#define HAVE_SUPPORTED_CURVES
#define HAVE_SERVER_RENEGOTIATION_INFO
#define HAVE_ENCRYPT_THEN_MAC
#define HAVE_SNI
#define HAVE_SESSION_TICKET
extern int posix_getdevrandom(unsigned char *out, unsigned int sz);
#ifndef HAVE_HASHDRBG
#define CUSTOM_RAND_GENERATE_BLOCK posix_getdevrandom
#else
#define CUSTOM_RAND_GENERATE_SEED posix_getdevrandom
#endif
/* Minimal feature set - explicitly disable unwanted algorithms */
#define NO_RSA
#define NO_DH
#define NO_DSA
#define WOLFSSL_NO_SHAKE256
#define WOLFSSL_NO_SHAKE128
#define NO_MD4
#define NO_MD5
#define NO_DES3
#define NO_SHA
#define NO_OLD_TLS
/* Debugging */
#if 0
#define DEBUG_WOLFSSL
#endif
#define WOLFSSL_DEBUG_NONBLOCK
#endif /* WOLFSSL_USER_SETTINGS_H */