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.IX Title "EVP_SIGNATURE-DSA 7SSL"
.TH EVP_SIGNATURE-DSA 7SSL 2024-04-11 3.3.0 OpenSSL
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.nh
.SH NAME
EVP_SIGNATURE\-DSA
\&\- The EVP_PKEY DSA signature implementation
.SH DESCRIPTION
.IX Header "DESCRIPTION"
Support for computing DSA signatures.
See \fBEVP_PKEY\-DSA\fR\|(7) for information related to DSA keys.
.SS "Signature Parameters"
.IX Subsection "Signature Parameters"
The following signature parameters can be set using \fBEVP_PKEY_CTX_set_params()\fR.
This may be called after \fBEVP_PKEY_sign_init()\fR or \fBEVP_PKEY_verify_init()\fR,
and before calling \fBEVP_PKEY_sign()\fR or \fBEVP_PKEY_verify()\fR.
.IP """digest"" (\fBOSSL_SIGNATURE_PARAM_DIGEST\fR) <UTF8 string>" 4
.IX Item """digest"" (OSSL_SIGNATURE_PARAM_DIGEST) <UTF8 string>"
.PD 0
.IP """properties"" (\fBOSSL_SIGNATURE_PARAM_PROPERTIES\fR) <UTF8 string>" 4
.IX Item """properties"" (OSSL_SIGNATURE_PARAM_PROPERTIES) <UTF8 string>"
.IP """nonce-type"" (\fBOSSL_SIGNATURE_PARAM_NONCE_TYPE\fR) <unsigned integer>" 4
.IX Item """nonce-type"" (OSSL_SIGNATURE_PARAM_NONCE_TYPE) <unsigned integer>"
.PD
The settable parameters are described in \fBprovider\-signature\fR\|(7).
.PP
The following signature parameters can be retrieved using
\&\fBEVP_PKEY_CTX_get_params()\fR.
.IP """algorithm-id"" (\fBOSSL_SIGNATURE_PARAM_ALGORITHM_ID\fR) <octet string>" 4
.IX Item """algorithm-id"" (OSSL_SIGNATURE_PARAM_ALGORITHM_ID) <octet string>"
.PD 0
.IP """digest"" (\fBOSSL_SIGNATURE_PARAM_DIGEST\fR) <UTF8 string>" 4
.IX Item """digest"" (OSSL_SIGNATURE_PARAM_DIGEST) <UTF8 string>"
.IP """nonce-type"" (\fBOSSL_SIGNATURE_PARAM_NONCE_TYPE\fR) <unsigned integer>" 4
.IX Item """nonce-type"" (OSSL_SIGNATURE_PARAM_NONCE_TYPE) <unsigned integer>"
.PD
The gettable parameters are described in \fBprovider\-signature\fR\|(7).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_set_params\fR\|(3),
\&\fBEVP_PKEY_sign\fR\|(3),
\&\fBEVP_PKEY_verify\fR\|(3),
\&\fBprovider\-signature\fR\|(7),
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright 2020\-2023 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>.