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sslutil: issue warning when [hostfingerprint] is used...
sslutil: issue warning when [hostfingerprint] is used Mercurial 3.9 added the [hostsecurity] section, which is better than [hostfingerprints] in every way. One of the ways that [hostsecurity] is better is that it supports SHA-256 and SHA-512 fingerprints, not just SHA-1 fingerprints. The world is moving away from SHA-1 because it is borderline secure. Mercurial should be part of that movement. This patch adds a warning when a valid SHA-1 fingerprint from the [hostfingerprints] section is being used. The warning informs users to switch to [hostsecurity]. It even prints the config option they should set. It uses the SHA-256 fingerprint because recommending a SHA-1 fingerprint in 2017 would be ill-advised. The warning will print itself on every connection to a server until it is fixed. There is no way to suppress the warning. I admit this is annoying. But given the security implications of sticking with SHA-1, I think this is justified. If this patch is accepted, I'll likely send a follow-up to start warning on SHA-1 certificates in [hostsecurity] as well. Then sometime down the road, we can drop support for SHA-1 fingerprints. Credit for this idea comes from timeless in issue 5466.

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filediff.tmpl
58 lines | 2.7 KiB | application/x-cheetah | CheetahLexer
{header}
<title>{repo|escape}: diff {file|escape}</title>
<link rel="alternate" type="application/atom+xml" href="{url|urlescape}atom-log" title="Atom feed for {repo|escape}"/>
<link rel="alternate" type="application/rss+xml" href="{url|urlescape}rss-log" title="RSS feed for {repo|escape}"/>
</head>
<body>
<div id="container">
<div class="page-header">
<h1 class="breadcrumb"><a href="/">Mercurial</a> {pathdef%breadcrumb} / file diff</h1>
<form action="{url|urlescape}log">
{sessionvars%hiddenformentry}
<dl class="search">
<dt><label>Search: </label></dt>
<dd><input type="text" name="rev" /></dd>
</dl>
</form>
<ul class="page-nav">
<li><a href="{url|urlescape}summary{sessionvars%urlparameter}">summary</a></li>
<li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
<li><a href="{url|urlescape}log{sessionvars%urlparameter}">changelog</a></li>
<li><a href="{url|urlescape}graph/{symrev}{sessionvars%urlparameter}">graph</a></li>
<li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
<li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
<li><a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a></li>
<li><a href="{url|urlescape}file/{symrev}{path|urlescape}{sessionvars%urlparameter}">files</a></li>
<li><a href="{url|urlescape}help{sessionvars%urlparameter}">help</a></li>
</ul>
</div>
<ul class="submenu">
<li><a href="{url|urlescape}file/{symrev}/{file|urlescape}{sessionvars%urlparameter}">file</a></li>
<li><a href="{url|urlescape}file/tip/{file|urlescape}{sessionvars%urlparameter}">latest</a></li>
<li><a href="{url|urlescape}log/{symrev}/{file|urlescape}{sessionvars%urlparameter}">revisions</a></li>
<li><a href="{url|urlescape}annotate/{symrev}/{file|urlescape}{sessionvars%urlparameter}">annotate</a></li>
<li class="current">diff</li>
<li><a href="{url|urlescape}comparison/{symrev}/{file|urlescape}{sessionvars%urlparameter}">comparison</a></li>
<li><a href="{url|urlescape}raw-diff/{symrev}/{file|urlescape}">raw</a></li>
</ul>
<h2 class="no-link no-border">diff: {file|escape}</h2>
<h3 class="changeset">{file|escape}</h3>
<dl class="overview">
{branch%filerevbranch}
<dt>changeset {rev}</dt>
<dd><a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">{node|short}</a></dd>
{parent%filediffparent}
{child%filediffchild}
</dl>
<div class="diff diffblocks">
{diff}
</div>
{footer}