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<h3>
Eric S. Raymond pushed to branch master
at <a href="https://gitlab.com/NTPsec/ntpsec">NTPsec / ntpsec</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.com/NTPsec/ntpsec/commit/2062c8d0a7a3c444e1ec1b9f27ef998c78b1388b">2062c8d0</a></strong>
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<span>by Eric S. Raymond</span>
<i>at 2016-10-31T18:06:27-04:00</i>
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<pre class="commit-message" style="margin: 0; white-space: pre-wrap">More steps towards authenticated send in Python.
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<h4>2 changed files:</h4>
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ntpq/pyntpq
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pylib/packet.py
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<h4>Changes:</h4>
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<a href="https://gitlab.com/NTPsec/ntpsec/commit/2062c8d0a7a3c444e1ec1b9f27ef998c78b1388b#diff-0"><strong>ntpq/pyntpq</strong></a>
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<td class="line_content match " style="background: #fafafa; color: rgba(0,0,0,0.3); padding-left: 0.5em; padding-right: 0.5em" bgcolor="#fafafa">@@ -1486,5 +1486,5 @@ if __name__ == '__main__':</td>
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<pre style="margin: 0"> <span id="LC1486" class="line"> <span class="n" style="color: #333">session</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">close</span><span class="p">()</span></span>
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1487
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<pre style="margin: 0"> <span id="LC1487" class="line"> <span class="k" style="font-weight: bold">raise</span> <span class="nb" style="color: #0086b3">SystemExit</span><span class="p">(</span><span class="mi" style="color: #099">0</span><span class="p">)</span></span>
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1488
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<pre style="margin: 0"> <span id="LC1488" class="line"> <span class="k" style="font-weight: bold">except</span> <span class="nb" style="color: #0086b3">KeyboardInterrupt</span><span class="p">:</span></span>
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<pre style="margin: 0"> <span id="LC1489" class="line"> <span class="bp" style="color: #999"><span class="idiff left right">self</span></span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">say</span><span class="p">(</span><span class="s" style="color: #d14">"</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="LC1489" class="line"> <span class="n" style="color: #333"><span class="idiff left right">interpeter</span></span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">say</span><span class="p">(</span><span class="s" style="color: #d14">"</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="LC1490" class="line"><span class="c" style="color: #998; font-style: italic"># end</span></span></pre>
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<a href="https://gitlab.com/NTPsec/ntpsec/commit/2062c8d0a7a3c444e1ec1b9f27ef998c78b1388b#diff-1"><strong>pylib/packet.py</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="410" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="background: #fafafa; color: rgba(0,0,0,0.3); padding-left: 0.5em; padding-right: 0.5em" bgcolor="#fafafa">@@ -410,6 +410,15 @@ class Mode6Session:</td>
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<pre style="margin: 0"> <span id="LC410" class="line"> <span class="c" style="color: #998; font-style: italic"># Assemble the packet</span></span>
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<pre style="margin: 0"> <span id="LC411" class="line"> <span class="n" style="color: #333">pkt</span> <span class="o" style="font-weight: bold">=</span> <span class="n" style="color: #333">Mode6Packet</span><span class="p">(</span><span class="bp" style="color: #999">self</span><span class="p">,</span> <span class="n" style="color: #333">opcode</span><span class="p">,</span> <span class="n" style="color: #333">associd</span><span class="p">,</span> <span class="n" style="color: #333">qdata</span><span class="p">)</span></span>
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<pre style="margin: 0"> <span id="LC412" class="line"></span>
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<pre style="margin: 0"> <span id="LC413" class="line"> <span class="c" style="color: #998; font-style: italic"># If we have data, pad it out to a 32-bit boundary.</span></span>
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<pre style="margin: 0"> <span id="LC414" class="line"> <span class="k" style="font-weight: bold">if</span> <span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span><span class="p">:</span></span>
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<pre style="margin: 0"> <span id="LC415" class="line"> <span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span> <span class="o" style="font-weight: bold">=</span> <span class="n" style="color: #333">polybytes</span><span class="p">(</span><span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span><span class="p">)</span></span>
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<pre style="margin: 0"> <span id="LC416" class="line"> <span class="k" style="font-weight: bold">while</span> <span class="p">((</span><span class="n" style="color: #333">Packet</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">HEADER_LEN</span> <span class="o" style="font-weight: bold">+</span> <span class="nb" style="color: #0086b3">len</span><span class="p">(</span><span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span><span class="p">))</span> <span class="o" style="font-weight: bold">&</span> <span class="mi" style="color: #099">3</span><span class="p">):</span></span>
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<pre style="margin: 0"> <span id="LC417" class="line"> <span class="k" style="font-weight: bold">print</span><span class="p">(</span><span class="s" style="color: #d14">"Adding pad byte"</span><span class="p">)</span></span>
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<pre style="margin: 0"> <span id="LC418" class="line"> <span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span> <span class="o" style="font-weight: bold">+=</span> <span class="n" style="color: #333">b</span><span class="s" style="color: #d14">"</span><span class="se" style="color: #d14">\x00</span><span class="s" style="color: #d14">"</span></span>
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<pre style="margin: 0"> <span id="LC419" class="line"> <span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span> <span class="o" style="font-weight: bold">=</span> <span class="n" style="color: #333">polystr</span><span class="p">(</span><span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span><span class="p">)</span></span>
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<pre style="margin: 0"> <span id="LC420" class="line"> <span class="k" style="font-weight: bold">print</span><span class="p">(</span><span class="s" style="color: #d14">"Length after early padding: </span><span class="si" style="color: #d14">%</span><span class="s" style="color: #d14">d"</span> <span class="o" style="font-weight: bold">%</span> <span class="p">(</span><span class="n" style="color: #333">Packet</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">HEADER_LEN</span> <span class="o" style="font-weight: bold">+</span> <span class="nb" style="color: #0086b3">len</span><span class="p">(</span><span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span><span class="p">)))</span></span>
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<pre style="margin: 0"> <span id="LC421" class="line"></span>
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<pre style="margin: 0"> <span id="LC422" class="line"> <span class="c" style="color: #998; font-style: italic"># If it isn't authenticated we can just send it. Otherwise</span></span>
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<pre style="margin: 0"> <span id="LC423" class="line"> <span class="c" style="color: #998; font-style: italic"># we're going to have to think about it a little.</span></span>
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<pre style="margin: 0"> <span id="LC424" class="line"> <span class="k" style="font-weight: bold">if</span> <span class="ow" style="font-weight: bold">not</span> <span class="n" style="color: #333">auth</span> <span class="ow" style="font-weight: bold">and</span> <span class="ow" style="font-weight: bold">not</span> <span class="bp" style="color: #999">self</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">always_auth</span><span class="p">:</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="426" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="background: #fafafa; color: rgba(0,0,0,0.3); padding-left: 0.5em; padding-right: 0.5em" bgcolor="#fafafa">@@ -417,7 +426,7 @@ class Mode6Session:</td>
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<pre style="margin: 0"> <span id="LC426" class="line"></span>
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<pre style="margin: 0"> <span id="LC427" class="line"> <span class="c" style="color: #998; font-style: italic"># Pad out packet to a multiple of 8 octets to be sure</span></span>
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<pre style="margin: 0"> <span id="LC428" class="line"> <span class="c" style="color: #998; font-style: italic"># receiver can handle it. Note: these pad bytes should</span></span>
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<pre style="margin: 0"> <span id="LC420" class="line"> <span class="c" style="color: #998; font-style: italic"># *not* be counted in the <span class="idiff left right">extension length</span>.</span></span>
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<pre style="margin: 0"> <span id="LC429" class="line"> <span class="c" style="color: #998; font-style: italic"># *not* be counted in the <span class="idiff left right">header count field</span>.</span></span>
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421
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430
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<pre style="margin: 0"> <span id="LC430" class="line"> <span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span> <span class="o" style="font-weight: bold">=</span> <span class="n" style="color: #333">polybytes</span><span class="p">(</span><span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span><span class="p">)</span></span>
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422
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431
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<pre style="margin: 0"> <span id="LC431" class="line"> <span class="k" style="font-weight: bold">while</span> <span class="p">((</span><span class="n" style="color: #333">Packet</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">HEADER_LEN</span> <span class="o" style="font-weight: bold">+</span> <span class="nb" style="color: #0086b3">len</span><span class="p">(</span><span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span><span class="p">))</span> <span class="o" style="font-weight: bold">&</span> <span class="mi" style="color: #099">7</span><span class="p">):</span></span>
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423
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<pre style="margin: 0"> <span id="LC432" class="line"> <span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span> <span class="o" style="font-weight: bold">+=</span> <span class="n" style="color: #333">b</span><span class="s" style="color: #d14">"</span><span class="se" style="color: #d14">\x00</span><span class="s" style="color: #d14">"</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="445" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="454" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="background: #fafafa; color: rgba(0,0,0,0.3); padding-left: 0.5em; padding-right: 0.5em" bgcolor="#fafafa">@@ -445,7 +454,7 @@ class Mode6Session:</td>
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445
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<pre style="margin: 0"> <span id="LC454" class="line"> <span class="k" style="font-weight: bold">if</span> <span class="n" style="color: #333">hasher</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">digest_size</span> <span class="o" style="font-weight: bold">==</span> <span class="mi" style="color: #099">0</span><span class="p">:</span></span>
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446
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<pre style="margin: 0"> <span id="LC455" class="line"> <span class="k" style="font-weight: bold">raise</span> <span class="n" style="color: #333">Mode6Exception</span><span class="p">(</span><span class="n" style="color: #333">SERR_NOKEY</span><span class="p">)</span></span>
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447
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456
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<pre style="margin: 0"> <span id="LC456" class="line"> <span class="k" style="font-weight: bold">else</span><span class="p">:</span></span>
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448
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<pre style="margin: 0"> <span id="LC448" class="line"> <span class="n" style="color: #333">prefix</span> <span class="o" style="font-weight: bold">=</span> <span class="n" style="color: #333">polystr</span><span class="p">(</span><span class="n" style="color: #333">struct</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">pack</span><span class="p">(</span><span class="s" style="color: #d14">"!<span class="idiff left right">H</span>"</span><span class="p">,</span> <span class="bp" style="color: #999">self</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">keyid</span><span class="p">))</span></span>
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<td class="diff-line-num new new_line" data-linenumber="457" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0"> <span id="LC457" class="line"> <span class="n" style="color: #333">prefix</span> <span class="o" style="font-weight: bold">=</span> <span class="n" style="color: #333">polystr</span><span class="p">(</span><span class="n" style="color: #333">struct</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">pack</span><span class="p">(</span><span class="s" style="color: #d14">"!<span class="idiff left right">I</span>"</span><span class="p">,</span> <span class="bp" style="color: #999">self</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">keyid</span><span class="p">))</span></span>
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<pre style="margin: 0"> <span id="LC458" class="line"> <span class="n" style="color: #333">mac</span> <span class="o" style="font-weight: bold">=</span> <span class="n" style="color: #333">polystr</span><span class="p">(</span><span class="n" style="color: #333">hasher</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">digest</span><span class="p">())</span></span>
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450
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<pre style="margin: 0"> <span id="LC459" class="line"> <span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span> <span class="o" style="font-weight: bold">+=</span> <span class="n" style="color: #333">prefix</span></span>
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460
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<pre style="margin: 0"> <span id="LC460" class="line"> <span class="n" style="color: #333">pkt</span><span class="o" style="font-weight: bold">.</span><span class="n" style="color: #333">extension</span> <span class="o" style="font-weight: bold">+=</span> <span class="n" style="color: #333">mac</span></span>
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