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<a href="https://gitlab.com/rockdaboot">Tim Rühsen</a>
commented on a
discussion on <a href="https://gitlab.com/gnutls/gnutls/merge_requests/1141#note_265075928">lib/x509/common.h</a>:
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<pre style="margin: 0;"> <span id="LC279" class="line" lang="c"><span class="kr" style="font-weight: 600;">inline</span> <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;">_asn1_strict_der_decode</span> <span class="p">(</span><span class="n" style="color: #333;">asn1_node</span> <span class="o" style="font-weight: 600;">*</span> <span class="n" style="color: #333;">element</span><span class="p">,</span> <span class="k" style="font-weight: 600;">const</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;">ider</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC280" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="n" style="color: #333;">len</span><span class="p">,</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;">errorDescription</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC281" class="line" lang="c"><span class="p">{</span></span>
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<pre style="margin: 0;">-<span id="LC282" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#ifdef ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME</span></span>
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<pre style="margin: 0;">-<span id="LC283" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;"># define _ASN1_DER_FLAGS ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME|ASN1_DECODE_FLAG_STRICT_DER</span></span>
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<pre style="margin: 0;">-<span id="LC284" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#else</span></span>
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<pre style="margin: 0;">+<span id="LC282" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#if defined(STRICT_DER_TIME) || !defined(ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME)</span></span>
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<pre style="margin: 0;"> <span id="LC283" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;"># define _ASN1_DER_FLAGS ASN1_DECODE_FLAG_STRICT_DER</span></span>
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<pre style="margin: 0;">+<span id="LC284" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#else</span></span>
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<pre style="margin: 0;">+<span id="LC285" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;"># define _ASN1_DER_FLAGS ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME|ASN1_DECODE_FLAG_STRICT_DER</span></span>
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<p dir="auto">Sorry for being not precise - I meant</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"># define _ASN1_DER_FLAGS (ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME | ASN1_DECODE_FLAG_STRICT_DER)</span></code></pre>
<p dir="auto">Because <code>&</code> and others have precedence over <code>|</code>, using <code>_ASN1_DER_FLAGS</code> might cause unwanted behavior and hard to find bugs under certain conditions.</p>
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