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.Dd $Mdocdate: November 2 2016 $
.Dt DSA_SIZE 3
.Os
.Sh NAME
.Nm DSA_size
.Nd get DSA signature size
.Sh SYNOPSIS
.In openssl/dsa.h
.Ft int
.Fo DSA_size
.Fa "const DSA *dsa"
.Fc
.Sh DESCRIPTION
This function returns the size of an ASN.1 encoded DSA signature in
bytes.
It can be used to determine how much memory must be allocated for a DSA
signature.
.Pp
.Fa dsa->q
must not be
.Dv NULL .
.Sh RETURN VALUE
The size in bytes.
.Sh SEE ALSO
.Xr dsa 3 ,
.Xr DSA_sign 3
.Sh HISTORY
.Fn DSA_size
is available in all versions of SSLeay and OpenSSL.
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