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<p dir="auto">I am unable to get GnuTLS and OpenSSL to play nicely together on IPv6. Here are the two commands:</p>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">$ cat tests/psk.txt </span>
<span id="LC2" class="line" lang="plaintext">foo:7df28f5439b5a051cc138b6e12128264</span>
<span id="LC3" class="line" lang="plaintext"></span>
<span id="LC4" class="line" lang="plaintext">$ gnutls-serv -p 5000 --echo --priority NORMAL:+ECDHE-PSK:+DHE-PSK:+PSK --pskpasswd=psk.txt</span>
<span id="LC5" class="line" lang="plaintext">Warning: no private key and certificate pairs were set.</span>
<span id="LC6" class="line" lang="plaintext">Echo Server listening on IPv4 0.0.0.0 port 5000...done</span>
<span id="LC7" class="line" lang="plaintext">Echo Server listening on IPv6 :: port 5000...done</span>
<span id="LC8" class="line" lang="plaintext"></span>
<span id="LC9" class="line" lang="plaintext">* Accepted connection from IPv6 ::1 port 57192 on Wed Jan 23 17:59:01 2019</span>
<span id="LC10" class="line" lang="plaintext">Error in handshake: An illegal parameter has been received.</span></code></pre>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">$ openssl s_client -connect [::1]:5000 -psk_identity foo -psk 7df28f5439b5a051cc138b6e12128264</span>
<span id="LC2" class="line" lang="plaintext">CONNECTED(00000003)</span>
<span id="LC3" class="line" lang="plaintext">139765944088384:error:14094417:SSL routines:ssl3_read_bytes:sslv3 alert illegal parameter:ssl/record/rec_layer_s3.c:1528:SSL alert number 47</span>
<span id="LC4" class="line" lang="plaintext">---</span>
<span id="LC5" class="line" lang="plaintext">no peer certificate available</span>
<span id="LC6" class="line" lang="plaintext">---</span>
<span id="LC7" class="line" lang="plaintext">No client certificate CA names sent</span>
<span id="LC8" class="line" lang="plaintext">---</span>
<span id="LC9" class="line" lang="plaintext">SSL handshake has read 7 bytes and written 405 bytes</span>
<span id="LC10" class="line" lang="plaintext">Verification: OK</span>
<span id="LC11" class="line" lang="plaintext">---</span>
<span id="LC12" class="line" lang="plaintext">New, (NONE), Cipher is (NONE)</span>
<span id="LC13" class="line" lang="plaintext">Secure Renegotiation IS NOT supported</span>
<span id="LC14" class="line" lang="plaintext">Compression: NONE</span>
<span id="LC15" class="line" lang="plaintext">Expansion: NONE</span>
<span id="LC16" class="line" lang="plaintext">No ALPN negotiated</span>
<span id="LC17" class="line" lang="plaintext">Early data was not sent</span>
<span id="LC18" class="line" lang="plaintext">Verify return code: 0 (ok)</span>
<span id="LC19" class="line" lang="plaintext">---</span></code></pre>
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