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137 .IX Title "DSA_dup_DH 3"
138 .TH DSA_dup_DH 3 "2009-07-19" "1.0.1n" "OpenSSL"
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144 DSA_dup_DH \- create a DH structure out of DSA structure
148 .IX Header "SYNOPSIS"
150 \& #include <openssl/dsa.h>
152 \& DH * DSA_dup_DH(const DSA *r);
155 .IX Header "DESCRIPTION"
156 \&\fIDSA_dup_DH()\fR duplicates \s-1DSA\s0 parameters/keys as \s-1DH\s0 parameters/keys. q
157 is lost during that conversion, but the resulting \s-1DH\s0 parameters
160 .IX Header "RETURN VALUE"
161 \&\fIDSA_dup_DH()\fR returns the new \fB\s-1DH\s0\fR structure, and \s-1NULL\s0 on error. The
162 error codes can be obtained by \fIERR_get_error\fR\|(3).
165 Be careful to avoid small subgroup attacks when using this.
167 .IX Header "SEE ALSO"
168 \&\fIopenssl_dh\fR\|(3), \fIopenssl_dsa\fR\|(3), \fIERR_get_error\fR\|(3)
171 \&\fIDSA_dup_DH()\fR was added in OpenSSL 0.9.4.