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1 | =pod |
2 | ||
3 | =head1 NAME | |
4 | ||
4d524e10 | 5 | DSA_dup_DH - create a DH structure out of DSA structure |
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6 | |
7 | =head1 SYNOPSIS | |
8 | ||
9 | #include <openssl/dsa.h> | |
10 | ||
ada66e78 P |
11 | Deprecated since OpenSSL 3.0, can be hidden entirely by defining |
12 | B<OPENSSL_API_COMPAT> with a suitable version value, see | |
13 | L<openssl_user_macros(7)>: | |
14 | ||
e9b77246 | 15 | DH *DSA_dup_DH(const DSA *r); |
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16 | |
17 | =head1 DESCRIPTION | |
18 | ||
ada66e78 P |
19 | The function described on this page is deprecated. There is no direct |
20 | replacement, applications should use the EVP_PKEY APIs for Diffie-Hellman | |
21 | operations. | |
22 | ||
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23 | DSA_dup_DH() duplicates DSA parameters/keys as DH parameters/keys. q |
24 | is lost during that conversion, but the resulting DH parameters | |
25 | contain its length. | |
26 | ||
1f13ad31 | 27 | =head1 RETURN VALUES |
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28 | |
29 | DSA_dup_DH() returns the new B<DH> structure, and NULL on error. The | |
9b86974e | 30 | error codes can be obtained by L<ERR_get_error(3)>. |
38e33cef | 31 | |
74235cc9 UM |
32 | =head1 NOTE |
33 | ||
34 | Be careful to avoid small subgroup attacks when using this. | |
35 | ||
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36 | =head1 SEE ALSO |
37 | ||
b97fdb57 | 38 | L<DH_new(3)>, L<DSA_new(3)>, L<ERR_get_error(3)> |
38e33cef | 39 | |
ada66e78 P |
40 | =head1 HISTORY |
41 | ||
42 | This function was deprecated in OpenSSL 3.0. | |
43 | ||
e2f92610 RS |
44 | =head1 COPYRIGHT |
45 | ||
61f805c1 | 46 | Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved. |
e2f92610 | 47 | |
4746f25a | 48 | Licensed under the Apache License 2.0 (the "License"). You may not use |
e2f92610 RS |
49 | this file except in compliance with the License. You can obtain a copy |
50 | in the file LICENSE in the source distribution or at | |
51 | L<https://www.openssl.org/source/license.html>. | |
52 | ||
53 | =cut |