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.\" ========================================================================
.\"
.IX Title "DSA_SIZE 3"
.TH DSA_SIZE 3 "2023-09-11" "1.1.1w" "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"
DSA_size, DSA_bits, DSA_security_bits \- get DSA signature size, key bits or security bits
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/dsa.h>
\&
\& int DSA_size(const DSA *dsa);
\& int DSA_bits(const DSA *dsa);
\& int DSA_security_bits(const DSA *dsa);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fIDSA_size()\fR returns the maximum size of an \s-1ASN.1\s0 encoded \s-1DSA\s0 signature
for key \fBdsa\fR in bytes. It can be used to determine how much memory must
be allocated for a \s-1DSA\s0 signature.
.PP
\&\fBdsa\->q\fR must not be \fB\s-1NULL\s0\fR.
.PP
\&\fIDSA_bits()\fR returns the number of bits in key \fBdsa\fR: this is the number
of bits in the \fBp\fR parameter.
.PP
\&\fIDSA_security_bits()\fR returns the number of security bits of the given \fBdsa\fR
key. See \fIBN_security_bits\fR\|(3).
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fIDSA_size()\fR returns the signature size in bytes.
.PP
\&\fIDSA_bits()\fR returns the number of bits in the key.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIDSA_new\fR\|(3), \fIDSA_sign\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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