EVP_MAC-Poly1305 - The Poly1305 EVP_MAC implementation
Support for computing Poly1305 MACs through the
EVP_MAC API.
This implementation is identified with this name and properties, to be used with
EVP_MAC_fetch():
- "POLY1305", "provider=default"
The general description of these parameters can be found in
"PARAMETERS" in
EVP_MAC(3).
The following parameter can be set with
EVP_MAC_CTX_set_params():
- "key" (OSSL_MAC_PARAM_KEY) <octet
string>
- Sets the MAC key. Setting this parameter is identical to
passing a key to EVP_MAC_init(3).
The following parameters can be retrieved with
EVP_MAC_CTX_get_params():
- "size" (OSSL_MAC_PARAM_SIZE) <unsigned
integer>
- Gets the MAC size.
The "size" parameter can also be retrieved with with
EVP_MAC_CTX_get_mac_size(). The length of the "size"
parameter should not exceed that of an
unsigned int.
The OpenSSL implementation of the Poly 1305 MAC corresponds to RFC 7539.
It is critical to never reuse the key. The security implication noted in RFC
8439 applies equally to the OpenSSL implementation.
EVP_MAC_CTX_get_params(3),
EVP_MAC_CTX_set_params(3),
"PARAMETERS" in
EVP_MAC(3),
OSSL_PARAM(3)
Copyright 2018-2021 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>.