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<a href="https://gitlab.com/juaristi">Ander Juaristi</a>
commented on a
discussion on <a href="https://gitlab.com/gnutls/gnutls/merge_requests/917#note_232875770">lib/psk.c</a>:
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<pre style="margin: 0;">+<span id="LC352" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> **/</span></span>
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<pre style="margin: 0;">+<span id="LC353" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span></span>
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<pre style="margin: 0;">+<span id="LC354" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">gnutls_psk_set_server_credentials_function2</span><span class="p">(</span><span class="n" style="color: #333;">gnutls_psk_server_credentials_t</span> <span class="n" style="color: #333;">cred</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC355" class="line" lang="c"> <span class="n" style="color: #333;">gnutls_psk_server_credentials_function2</span> <span class="n" style="color: #333;">func</span><span class="p">)</span></span>
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283
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<pre style="margin: 0;"> <span id="LC356" class="line" lang="c"><span class="p">{</span></span>
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<pre style="margin: 0;"> <span id="LC357" class="line" lang="c"> <span class="n" style="color: #333;">cred</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">pwd_callback</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">func</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC358" class="line" lang="c"> <span class="n" style="color: #333;">cred</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">pwd_callback_legacy</span> <span class="o" style="font-weight: 600;">=</span> <span class="nb" style="color: #0086b3;">NULL</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC359" class="line" lang="c"><span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC360" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC361" class="line" lang="c"><span class="k" style="font-weight: 600;">static</span> <span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="nf" style="color: #900; font-weight: 600;">call_client_callback_legacy</span><span class="p">(</span><span class="n" style="color: #333;">gnutls_session_t</span> <span class="n" style="color: #333;">session</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC362" class="line" lang="c"> <span class="n" style="color: #333;">gnutls_datum_t</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">username</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC363" class="line" lang="c"> <span class="n" style="color: #333;">gnutls_datum_t</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">key</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC364" class="line" lang="c"><span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC365" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="n" style="color: #333;">ret</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC366" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">char</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">user_p</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC367" class="line" lang="c"> <span class="n" style="color: #333;">gnutls_psk_client_credentials_t</span> <span class="n" style="color: #333;">cred</span> <span class="o" style="font-weight: 600;">=</span></span>
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<p dir="auto">The <code>cred</code> pointer is dereferenced below, in <a href="https://gitlab.com/gnutls/gnutls/blob/ajuaristi-issue-586/lib/psk.c#L371">line 371</a>:</p>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true" style="background-color: #fff; font-family: monospace; font-size: 90%; -premailer-cellpadding: 0; -premailer-cellspacing: 0; -premailer-width: 100%; margin: 0;"><code><span id="LC1" class="line" lang="plaintext">ret = cred->get_function_legacy(session, &user_p, key);</span></code></pre>
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