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Add warning for the --show-groups command that some groups are missing

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OpenSSL has a weird way of only reporting EC curves that are implemented
in a certain way in the list of all EC curves. Note this fact and point
out that also the very important curves X448 and X25519 are affected.

Change-Id: I86641bf60d62a50e9b2719e809d2429d65c00097
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Message-Id: <20231009105714.34598-1-frank@lichtenheld.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg27193.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This commit is contained in:
Arne Schwabe 2023-10-09 12:57:14 +02:00 committed by Gert Doering
parent 392da5bdaa
commit a840d5099a
1 changed files with 4 additions and 2 deletions
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6
src/openvpn/ssl_openssl.c
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@ -2249,8 +2249,10 @@ show_available_tls_ciphers_list(const char *cipher_list,
void
show_available_curves(void)
{
printf("Consider using openssl 'ecparam -list_curves' as\n"
"alternative to running this command.\n");
printf("Consider using 'openssl ecparam -list_curves' as alternative to running\n"
"this command.\n"
"Note this output does only list curves/groups that OpenSSL considers as\n"
"builtin EC curves. It does not list additional curves nor X448 or X25519\n");
#ifndef OPENSSL_NO_EC
EC_builtin_curve *curves = NULL;
size_t crv_len = 0;