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+.\" -*- mode: troff; coding: utf-8 -*-
+.\" Automatically generated by Pod::Man 5.01 (Pod::Simple 3.43)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
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+..
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+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD.  Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
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+.        if !\nF==2 \{\
+.            nr % 0
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+.\}
+.rr rF
+.\" ========================================================================
+.\"
+.IX Title "EVP_MAC-POLY1305 7ssl"
+.TH EVP_MAC-POLY1305 7ssl 2024-01-30 3.2.1 OpenSSL
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH NAME
+EVP_MAC\-Poly1305 \- The Poly1305 EVP_MAC implementation
+.SH DESCRIPTION
+.IX Header "DESCRIPTION"
+Support for computing Poly1305 MACs through the \fBEVP_MAC\fR API.
+.SS Identity
+.IX Subsection "Identity"
+This implementation is identified with this name and properties, to be
+used with \fBEVP_MAC_fetch()\fR:
+.IP """POLY1305"", ""provider=default""" 4
+.IX Item """POLY1305"", ""provider=default"""
+.SS "Supported parameters"
+.IX Subsection "Supported parameters"
+The general description of these parameters can be found in
+"PARAMETERS" in \fBEVP_MAC\fR\|(3).
+.PP
+The following parameter can be set with \fBEVP_MAC_CTX_set_params()\fR:
+.IP """key"" (\fBOSSL_MAC_PARAM_KEY\fR) <octet string>" 4
+.IX Item """key"" (OSSL_MAC_PARAM_KEY) <octet string>"
+Sets the MAC key.
+Setting this parameter is identical to passing a \fIkey\fR to \fBEVP_MAC_init\fR\|(3).
+.PP
+The following parameters can be retrieved with
+\&\fBEVP_MAC_CTX_get_params()\fR:
+.IP """size"" (\fBOSSL_MAC_PARAM_SIZE\fR) <unsigned integer>" 4
+.IX Item """size"" (OSSL_MAC_PARAM_SIZE) <unsigned integer>"
+Gets the MAC size.
+.PP
+The "size" parameter can also be retrieved with with \fBEVP_MAC_CTX_get_mac_size()\fR.
+The length of the "size" parameter should not exceed that of an \fBunsigned int\fR.
+.SH NOTES
+.IX Header "NOTES"
+The OpenSSL implementation of the Poly 1305 MAC corresponds to RFC 7539.
+.PP
+It is critical to never reuse the key.  The security implication noted in
+RFC 8439 applies equally to the OpenSSL implementation.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fBEVP_MAC_CTX_get_params\fR\|(3), \fBEVP_MAC_CTX_set_params\fR\|(3),
+"PARAMETERS" in \fBEVP_MAC\fR\|(3), \fBOSSL_PARAM\fR\|(3)
+.SH COPYRIGHT
+.IX Header "COPYRIGHT"
+Copyright 2018\-2021 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+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>.