197 lines
6.8 KiB
Groff
Executable File
197 lines
6.8 KiB
Groff
Executable File
.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
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.\" ========================================================================
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.\"
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.IX Title "EVP_MAC-BLAKE2 7"
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.TH EVP_MAC-BLAKE2 7 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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EVP_MAC\-BLAKE2, EVP_MAC\-BLAKE2BMAC, EVP_MAC\-BLAKE2SMAC
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\&\- The BLAKE2 EVP_MAC implementations
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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Support for computing \s-1BLAKE2\s0 MACs through the \fB\s-1EVP_MAC\s0\fR \s-1API\s0.
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.SS "Identity"
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.IX Subsection "Identity"
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These implementations are identified with one of these names and
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properties, to be used with \fIEVP_MAC_fetch()\fR:
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.ie n .IP """\s-1BLAKE2BMAC\s0"", ""provider=default""" 4
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.el .IP "``\s-1BLAKE2BMAC\s0'', ``provider=default''" 4
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.IX Item "BLAKE2BMAC, provider=default"
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.PD 0
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.ie n .IP """\s-1BLAKE2SMAC\s0"", ""provider=default""" 4
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.el .IP "``\s-1BLAKE2SMAC\s0'', ``provider=default''" 4
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.IX Item "BLAKE2SMAC, provider=default"
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.PD
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.SS "Supported parameters"
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.IX Subsection "Supported parameters"
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The general description of these parameters can be found in
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\&\*(L"\s-1PARAMETERS\s0\*(R" in \s-1\fIEVP_MAC\s0\fR\|(3).
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.PP
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All these parameters can be set with \fIEVP_MAC_CTX_set_params()\fR.
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Furthermore, the \*(L"size\*(R" parameter can be retrieved with
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\&\fIEVP_MAC_CTX_get_params()\fR, or with \fIEVP_MAC_size()\fR.
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The length of the \*(L"size\*(R" parameter should not exceed that of a \fBsize_t\fR.
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.ie n .IP """key"" (\fB\s-1OSSL_MAC_PARAM_KEY\s0\fR) <octet string>" 4
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.el .IP "``key'' (\fB\s-1OSSL_MAC_PARAM_KEY\s0\fR) <octet string>" 4
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.IX Item "key (OSSL_MAC_PARAM_KEY) <octet string>"
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This may be at most 64 bytes for \s-1BLAKE2BMAC\s0 or 32 for \s-1BLAKE2SMAC\s0 and
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at least 1 byte in both cases.
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.ie n .IP """custom"" (\fB\s-1OSSL_MAC_PARAM_CUSTOM\s0\fR) <octet string>" 4
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.el .IP "``custom'' (\fB\s-1OSSL_MAC_PARAM_CUSTOM\s0\fR) <octet string>" 4
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.IX Item "custom (OSSL_MAC_PARAM_CUSTOM) <octet string>"
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This is an optional value of at most 16 bytes for \s-1BLAKE2BMAC\s0 or 8 for
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\&\s-1BLAKE2SMAC\s0.
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It is empty by default.
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.ie n .IP """salt"" (\fB\s-1OSSL_MAC_PARAM_SALT\s0\fR) <octet string>" 4
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.el .IP "``salt'' (\fB\s-1OSSL_MAC_PARAM_SALT\s0\fR) <octet string>" 4
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.IX Item "salt (OSSL_MAC_PARAM_SALT) <octet string>"
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This is an optional value of at most 16 bytes for \s-1BLAKE2BMAC\s0 or 8 for
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\&\s-1BLAKE2SMAC\s0.
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It is empty by default.
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.ie n .IP """size"" (\fB\s-1OSSL_MAC_PARAM_SIZE\s0\fR) <unsigned integer>" 4
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.el .IP "``size'' (\fB\s-1OSSL_MAC_PARAM_SIZE\s0\fR) <unsigned integer>" 4
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.IX Item "size (OSSL_MAC_PARAM_SIZE) <unsigned integer>"
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When set, this can be any number between between 1 and 32 for
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\&\s-1EVP_MAC_BLAKE2S\s0 or 64 for \s-1EVP_MAC_BLAKE2B\s0.
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It is 32 and 64 respectively by default.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIEVP_MAC_CTX_get_params\fR\|(3), \fIEVP_MAC_CTX_set_params\fR\|(3),
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\&\*(L"\s-1PARAMETERS\s0\*(R" in \s-1\fIEVP_MAC\s0\fR\|(3), \s-1\fIOSSL_PARAM\s0\fR\|(3)
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.SH "HISTORY"
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.IX Header "HISTORY"
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The macros and functions described here were added to OpenSSL 3.0.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2018\-2019 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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