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<a href="https://gitlab.com/dkg" style="color: #1068bf;">Daniel Kahn Gillmor</a>
<a href="https://gitlab.com/gnutls/gnutls/-/issues/1237#note_958565139" style="color: #1068bf;">commented</a>:
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<p dir="auto" style="color: #303030; margin: 0 0 16px;" align="initial">Sorry, this does still seem to be an issue. <a href="https://gitlab.com/ZoltanFridrich" data-user="8380993" data-reference-type="user" data-container="body" data-placement="top" class="gfm gfm-project_member js-user-link" title="Zoltán Fridrich" style="color: #1068bf; background-color: #cbe2f9; border-radius: 4px; margin-top: 0; padding: 0 2px;">@ZoltanFridrich</a> 's example is not an example of the stated problem: the fact that zero is out of bounds doesn't have anything to do with the fact that some bitstring serial numbers might have the high bit set.</p>
<p dir="auto" style="color: #303030; margin: 0 0 16px;" align="initial">For example, if i offer the example hex string (<code style='font-size: 90%; color: #1f1f1f; word-wrap: break-word; background-color: #f0f0f0; border-radius: 4px; margin-top: 0; font-weight: inherit; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>0xabcd</code>) as the serial number, the <a href="https://gitlab.com/gnutls/gnutls/uploads/1eef43ae81491ccbfb7a941a1a6c5aac/x.crt.txt" data-canonical-src="/uploads/1eef43ae81491ccbfb7a941a1a6c5aac/x.crt.txt" data-link="true" class="gfm" style="color: #1068bf;">produced certificate</a>produced certificate has the high bit set in the serial number. <code style='font-size: 90%; color: #1f1f1f; word-wrap: break-word; background-color: #f0f0f0; border-radius: 4px; font-weight: inherit; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>dumpasn1</code> even complains about it:</p>
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<pre class="code highlight js-syntax-highlight language-plaintext" lang="plaintext" v-pre="true" style='display: block; font-size: 13px; color: #303030; line-height: 1.6em; overflow-x: auto; border-radius: 2px; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; margin: 0 0 16px; padding: 12px; border: 1px solid #dbdbdb;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: 4px; white-space: pre; margin-top: 0; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;"> 13 2: INTEGER 43981</span>
<span id="LC2" class="line" lang="plaintext"> : Error: Integer is encoded as a negative value.</span></code></pre>
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