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<a href="https://gitlab.com/dueno">Daiki Ueno</a>
commented on a discussion
on <a href="https://gitlab.com/gnutls/gnutls/merge_requests/775#note_113406203">lib/includes/gnutls/gnutls.h.in</a>:
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<pre style="margin: 0;"> <span id="LC2986" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC2987" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="n" style="color: #333;">gnutls_supplemental_send</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 class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="n" style="color: #333;">do_send_supplemental</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC2988" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC2989" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* Anti-replay related functions */</span></span>
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<pre style="margin: 0;">+<span id="LC2990" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC2991" class="line" lang="c"><span class="k" style="font-weight: 600;">typedef</span> <span class="k" style="font-weight: 600;">struct</span> <span class="n" style="color: #333;">gnutls_anti_replay_st</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">gnutls_anti_replay_t</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC2992" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC2993" class="line" lang="c"><span class="k" style="font-weight: 600;">typedef</span> <span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="p">(</span><span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">gnutls_anti_replay_add_func</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="o" style="font-weight: 600;">*</span><span class="p">,</span> <span class="k" style="font-weight: 600;">const</span> <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="LC2994" class="line" lang="c"><span class="k" style="font-weight: 600;">typedef</span> <span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="p">(</span><span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">gnutls_anti_replay_check_func</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="o" style="font-weight: 600;">*</span><span class="p">,</span> <span class="k" style="font-weight: 600;">const</span> <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="LC2995" class="line" lang="c"><span class="k" style="font-weight: 600;">typedef</span> <span class="kt" style="color: #458; font-weight: 600;">void</span><span class="p">(</span><span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">gnutls_anti_replay_clear_func</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="o" style="font-weight: 600;">*</span><span class="p">);</span></span>
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<p dir="auto">For the latter approach, what do you say the new backend functions (<code>store</code>, <code>remove</code>, <code>retr</code>) take a list of attributes instead of a datum, as in <code>C_FindObjects</code> in PKCS#11?  That way we could supply arbitrary hints to the backend and wouldn't need another function for the "remove all" behavior.</p>
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