EVP_KEYEXCH-X25519(7SSL) OpenSSL EVP_KEYEXCH-X25519(7SSL)
NAME
EVP_KEYEXCH-X25519, EVP_KEYEXCH-X448 - X25519 and X448 Key Exchange
algorithm support
DESCRIPTION
Key exchange support for the X25519 and X448 key types.
Key exchange parameters
"pad" (OSSL_EXCHANGE_PARAM_PAD) <unsigned integer>
"fips-indicator" (OSSL_EXCHANGE_PARAM_FIPS_APPROVED_INDICATOR) <integer>
X25519 and X448 are not FIPS approved in FIPS 140-3. So this getter
will return 0.
See "Common Key Exchange parameters" in provider-keyexch(7).
EXAMPLES
Keys for the host and peer can be generated as shown in "Examples" in
EVP_PKEY-X25519(7).
The code to generate a shared secret is identical to "Examples" in
EVP_KEYEXCH-DH(7).
SEE ALSO
EVP_PKEY-FFC(7), EVP_PKEY-DH(7) EVP_PKEY(3), provider-keyexch(7),
provider-keymgmt(7), OSSL_PROVIDER-default(7), OSSL_PROVIDER-FIPS(7),
COPYRIGHT
Copyright 2020-2024 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
3.5.4 2025-09-30 EVP_KEYEXCH-X25519(7SSL)
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