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<a href="https://gitlab.com/Vrancken">Tom</a>
commented on a discussion
on <a href="https://gitlab.com/gnutls/gnutls/merge_requests/650#note_101688278">lib/pcert.c</a>:
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<pre style="margin: 0;"> <span id="LC552" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC553" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* Converts the first certificate for the cert_auth_info structure</span></span>
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<pre style="margin: 0;"> <span id="LC554" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * to a pcert.</span></span>
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<pre style="margin: 0;">+<span id="LC555" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *</span></span>
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<td class="diff-line-num new new_line" data-linenumber="556" 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="LC556" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * REMARK 1: why limit ourselves to only be able to convert the first cert in the chain?</span></span>
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<pre style="margin: 0;">+<span id="LC557" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * REMARK 2: there is a lot of conversion between a raw cert / cert chain (gnutls_datum_t)</span></span>
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<pre style="margin: 0;">+<span id="LC558" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * and gnutls_pcert_st going on (e.g. cert_auth_info to pcert). There is also quite some</span></span>
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<pre style="margin: 0;">+<span id="LC559" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * overlap in data between these two types. The difference is that pcert holds only 1 cert</span></span>
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<pre style="margin: 0;">+<span id="LC560" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * and cert_auth_info has the entire chain. During cert reception (in e.g. _gnutls_proc_x509_server_crt)</span></span>
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<pre style="margin: 0;">+<span id="LC561" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * we also convert from raw to pcert. First we call gnutls_pcert_import_x509_raw to get a list with pcerts.</span></span>
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<pre style="margin: 0;">+<span id="LC562" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * Then we call check_pk_compat to do some checks. Finally we call _gnutls_pcert_to_auth_info to save all</span></span>
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<pre style="margin: 0;">+<span id="LC563" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * certs as raw again (we retrieve only the raw data from the pcert). Later on e.g. in</span></span>
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<pre style="margin: 0;">+<span id="LC564" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * _gnutls_proc_dhe_signature() we need a pcert again and convert back via our function below.</span></span>
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<pre style="margin: 0;">+<span id="LC565" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * Why not internally store all certs / cert chains as pcerts? That migth save some conversion</span></span>
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<pre style="margin: 0;">+<span id="LC566" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * work and simplifies things.</span></span>
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<p dir="auto">I will look into it and, if possible, propose a solution via a different patch.</p>
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