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<a href="https://gitlab.com/asosedkin">Alexander Sosedkin</a>
started a new
discussion on <a href="https://gitlab.com/gnutls/gnutls/-/merge_requests/1447#note_599305535">tests/system-override-sig-tls.c</a>:
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68
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<pre style="margin: 0;">+<span id="LC68" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC69" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define PRIO "NORMAL:-VERS-ALL:+VERS-TLS1.3:-SIGN-ALL:" \</span></span>
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<pre style="margin: 0;">+<span id="LC70" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;"> "+SIGN-RSA-PSS-RSAE-SHA256:+SIGN-RSA-PSS-RSAE-SHA384"</span></span>
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71
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<pre style="margin: 0;">+<span id="LC71" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* rsa_pss_rsae_sha384 */</span></span>
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<pre style="margin: 0;">+<span id="LC72" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#define SIGALGS_EXP "\x00\x02\x08\x05"</span></span>
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73
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<pre style="margin: 0;">+<span id="LC73" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC74" 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>
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<pre style="margin: 0;">+<span id="LC75" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">ext_callback</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="n" style="color: #333;">ctx</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="n" style="color: #333;">tls_id</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC76" class="line" lang="c"> <span class="k" style="font-weight: 600;">const</span> <span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <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;">data</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="n" style="color: #333;">size</span><span class="p">)</span></span>
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77
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<pre style="margin: 0;">+<span id="LC77" class="line" lang="c"><span class="p">{</span></span>
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<td class="new_line diff-line-num new" data-linenumber="78" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC78" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">tls_id</span> <span class="o" style="font-weight: 600;">==</span> <span class="mi" style="color: #099;">13</span><span class="p">)</span> <span class="p">{</span> <span class="cm" style="color: #998; font-style: italic;">/* signature algorithms */</span></span>
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<pre style="margin: 0;">+<span id="LC79" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">!=</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="n" style="color: #333;">SIGALGS_EXP</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-</span> <span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="p">{</span></span>
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<td class="new_line diff-line-num new" data-linenumber="80" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC80" class="line" lang="c"> <span class="n" style="color: #333;">fail</span><span class="p">(</span><span class="s" style="color: #d14;">"invalid signature_algorithms length: %u != 4</span><span class="se" style="color: #d14;">\n</span><span class="s" style="color: #d14;">"</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC81" class="line" lang="c"> <span class="n" style="color: #333;">size</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC82" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC83" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">memcmp</span><span class="p">(</span><span class="n" style="color: #333;">data</span><span class="p">,</span> <span class="n" style="color: #333;">SIGALGS_EXP</span><span class="p">,</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="n" style="color: #333;">SIGALGS_EXP</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-</span> <span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">!=</span> <span class="mi" style="color: #099;">0</span><span class="p">)</span> <span class="p">{</span></span>
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<p dir="auto">I'm confused about that part. <code>insecure-sig = rsa-pss-rsae-sha384</code> means we should <em>not</em> expect <code>rsa_pss_rsae_sha384</code> here, which would be more like <code>memcmp(data, SIGALGS_UNEXP, sizeof(SIGALGS_UNEXP) - 1) == 0</code>, correct?</p>
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