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<h1>Source code for windows.wintrust</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">ctypes</span>
<span class="kn">import</span> <span class="nn">struct</span>
<span class="kn">import</span> <span class="nn">windows</span>
<span class="kn">from</span> <span class="nn">collections</span> <span class="kn">import</span> <span class="n">namedtuple</span>
<span class="kn">from</span> <span class="nn">windows</span> <span class="kn">import</span> <span class="n">winproxy</span>
<span class="kn">import</span> <span class="nn">windows.generated_def</span> <span class="k">as</span> <span class="nn">gdef</span>
<span class="kn">from</span> <span class="nn">windows.generated_def.winstructs</span> <span class="kn">import</span> <span class="o">*</span>
<span class="c1"># From: um/SoftPub.h</span>
<span class="n">WINTRUST_ACTION_GENERIC_VERIFY_V2</span> <span class="o">=</span> <span class="n">gdef</span><span class="o">.</span><span class="n">IID</span><span class="o">.</span><span class="n">from_string</span><span class="p">(</span><span class="s2">&quot;00AAC56B-CD44-11d0-8CC2-00C04FC295EE&quot;</span><span class="p">)</span>
<span class="n">DRIVER_ACTION_VERIFY</span> <span class="o">=</span> <span class="n">gdef</span><span class="o">.</span><span class="n">IID</span><span class="o">.</span><span class="n">from_string</span><span class="p">(</span><span class="s2">&quot;F750E6C3-38EE-11d1-85E5-00C04FC295EE&quot;</span><span class="p">)</span>
<span class="n">wintrust_know_return_value</span> <span class="o">=</span> <span class="p">[</span>
<span class="n">TRUST_E_PROVIDER_UNKNOWN</span><span class="p">,</span>
<span class="n">TRUST_E_ACTION_UNKNOWN</span><span class="p">,</span>
<span class="n">TRUST_E_SUBJECT_FORM_UNKNOWN</span><span class="p">,</span>
<span class="n">DIGSIG_E_ENCODE</span><span class="p">,</span>
<span class="n">TRUST_E_SUBJECT_NOT_TRUSTED</span><span class="p">,</span>
<span class="n">TRUST_E_BAD_DIGEST</span><span class="p">,</span>
<span class="n">DIGSIG_E_DECODE</span><span class="p">,</span>
<span class="n">DIGSIG_E_EXTENSIBILITY</span><span class="p">,</span>
<span class="n">PERSIST_E_SIZEDEFINITE</span><span class="p">,</span>
<span class="n">DIGSIG_E_CRYPTO</span><span class="p">,</span>
<span class="n">PERSIST_E_SIZEINDEFINITE</span><span class="p">,</span>
<span class="n">PERSIST_E_NOTSELFSIZING</span><span class="p">,</span>
<span class="n">TRUST_E_NOSIGNATURE</span><span class="p">,</span>
<span class="n">CERT_E_EXPIRED</span><span class="p">,</span>
<span class="n">CERT_E_VALIDITYPERIODNESTING</span><span class="p">,</span>
<span class="n">CERT_E_PURPOSE</span><span class="p">,</span>
<span class="n">CERT_E_ISSUERCHAINING</span><span class="p">,</span>
<span class="n">CERT_E_MALFORMED</span><span class="p">,</span>
<span class="n">CERT_E_UNTRUSTEDROOT</span><span class="p">,</span>
<span class="n">CERT_E_CHAINING</span><span class="p">,</span>
<span class="n">TRUST_E_FAIL</span><span class="p">,</span>
<span class="n">CERT_E_REVOKED</span><span class="p">,</span>
<span class="n">CERT_E_UNTRUSTEDTESTROOT</span><span class="p">,</span>
<span class="n">CERT_E_REVOCATION_FAILURE</span><span class="p">,</span>
<span class="n">CERT_E_CN_NO_MATCH</span><span class="p">,</span>
<span class="n">CERT_E_WRONG_USAGE</span><span class="p">,</span>
<span class="n">TRUST_E_EXPLICIT_DISTRUST</span><span class="p">,</span>
<span class="n">CERT_E_UNTRUSTEDCA</span><span class="p">,</span>
<span class="n">CERT_E_INVALID_POLICY</span><span class="p">,</span>
<span class="n">CERT_E_INVALID_NAME</span><span class="p">,</span>
<span class="n">CRYPT_E_FILE_ERROR</span><span class="p">,</span>
<span class="p">]</span>
<span class="n">wintrust_return_value_mapper</span> <span class="o">=</span> <span class="n">gdef</span><span class="o">.</span><span class="n">FlagMapper</span><span class="p">(</span><span class="o">*</span><span class="n">wintrust_know_return_value</span><span class="p">)</span>
<div class="viewcode-block" id="check_signature"><a class="viewcode-back" href="../../wintrust.html#windows.wintrust.check_signature">[docs]</a><span class="k">def</span> <span class="nf">check_signature</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Check if ``filename`` embeds a valid signature.</span>
<span class="sd"> :return: :class:`int`: ``0`` if ``filename`` have a valid signature else the error</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">file_data</span> <span class="o">=</span> <span class="n">WINTRUST_FILE_INFO</span><span class="p">()</span>
<span class="n">file_data</span><span class="o">.</span><span class="n">cbStruct</span> <span class="o">=</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">sizeof</span><span class="p">(</span><span class="n">WINTRUST_FILE_INFO</span><span class="p">)</span>
<span class="n">file_data</span><span class="o">.</span><span class="n">pcwszFilePath</span> <span class="o">=</span> <span class="n">filename</span>
<span class="n">file_data</span><span class="o">.</span><span class="n">hFile</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">file_data</span><span class="o">.</span><span class="n">pgKnownSubject</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">WVTPolicyGUID</span> <span class="o">=</span> <span class="n">WINTRUST_ACTION_GENERIC_VERIFY_V2</span>
<span class="n">win_trust_data</span> <span class="o">=</span> <span class="n">WINTRUST_DATA</span><span class="p">()</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">cbStruct</span> <span class="o">=</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">sizeof</span><span class="p">(</span><span class="n">WINTRUST_DATA</span><span class="p">)</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">pPolicyCallbackData</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">pSIPClientData</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">dwUIChoice</span> <span class="o">=</span> <span class="n">WTD_UI_NONE</span>
<span class="c1"># win_trust_data.fdwRevocationChecks = WTD_REVOKE_NONE</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">fdwRevocationChecks</span> <span class="o">=</span> <span class="n">WTD_REVOKE_WHOLECHAIN</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">dwUnionChoice</span> <span class="o">=</span> <span class="n">WTD_CHOICE_FILE</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">dwStateAction</span> <span class="o">=</span> <span class="n">WTD_STATEACTION_VERIFY</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">hWVTStateData</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">pwszURLReference</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">dwUIContext</span> <span class="o">=</span> <span class="mi">0</span>
<span class="c1">#win_trust_data.dwProvFlags = 0x1000 + 0x10 + 0x800</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">tmp_union</span><span class="o">.</span><span class="n">pFile</span> <span class="o">=</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">pointer</span><span class="p">(</span><span class="n">file_data</span><span class="p">)</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">winproxy</span><span class="o">.</span><span class="n">WinVerifyTrust</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">WVTPolicyGUID</span><span class="p">),</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">win_trust_data</span><span class="p">))</span>
<span class="n">win_trust_data</span><span class="o">.</span><span class="n">dwStateAction</span> <span class="o">=</span> <span class="n">WTD_STATEACTION_CLOSE</span>
<span class="n">winproxy</span><span class="o">.</span><span class="n">WinVerifyTrust</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">WVTPolicyGUID</span><span class="p">),</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">win_trust_data</span><span class="p">))</span>
<span class="k">return</span> <span class="n">wintrust_return_value_mapper</span><span class="p">[</span><span class="n">x</span> <span class="o">&amp;</span> <span class="mh">0xffffffff</span><span class="p">]</span></div>
<span class="k">def</span> <span class="nf">get_catalog_for_filename</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span>
<span class="n">ctx</span> <span class="o">=</span> <span class="n">HCATADMIN</span><span class="p">()</span>
<span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminAcquireContext</span><span class="p">(</span><span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">ctx</span><span class="p">),</span> <span class="n">DRIVER_ACTION_VERIFY</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="nb">hash</span> <span class="o">=</span> <span class="n">get_file_hash</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">hash</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminEnumCatalogFromHash</span><span class="p">(</span><span class="n">ctx</span><span class="p">,</span> <span class="nb">hash</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="nb">hash</span><span class="p">),</span> <span class="mi">0</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">t</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="n">tname</span> <span class="o">=</span> <span class="n">get_catalog_name_from_handle</span><span class="p">(</span><span class="n">t</span><span class="p">)</span>
<span class="k">while</span> <span class="n">t</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminEnumCatalogFromHash</span><span class="p">(</span><span class="n">ctx</span><span class="p">,</span> <span class="nb">hash</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="nb">hash</span><span class="p">),</span> <span class="mi">0</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">HCATINFO</span><span class="p">(</span><span class="n">t</span><span class="p">)))</span>
<span class="c1"># Todo: how to handle multiple catalog ?</span>
<span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminReleaseCatalogContext</span><span class="p">(</span><span class="n">ctx</span><span class="p">,</span> <span class="n">t</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminReleaseContext</span><span class="p">(</span><span class="n">ctx</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">return</span> <span class="n">tname</span>
<span class="k">def</span> <span class="nf">get_file_hash</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span>
<span class="n">f</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s2">&quot;rb&quot;</span><span class="p">)</span>
<span class="n">handle</span> <span class="o">=</span> <span class="n">windows</span><span class="o">.</span><span class="n">utils</span><span class="o">.</span><span class="n">get_handle_from_file</span><span class="p">(</span><span class="n">f</span><span class="p">)</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">DWORD</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminCalcHashFromFileHandle</span><span class="p">(</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">size</span><span class="p">),</span> <span class="kc">None</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">buffer</span> <span class="o">=</span> <span class="p">(</span><span class="n">BYTE</span> <span class="o">*</span> <span class="n">size</span><span class="o">.</span><span class="n">value</span><span class="p">)()</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminCalcHashFromFileHandle</span><span class="p">(</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">size</span><span class="p">),</span> <span class="n">buffer</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">WindowsError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="k">if</span> <span class="n">e</span><span class="o">.</span><span class="n">winerror</span> <span class="o">==</span> <span class="mi">1006</span><span class="p">:</span>
<span class="c1"># CryptCATAdminCalcHashFromFileHandle: [Error 1006]</span>
<span class="c1"># The volume for a file has been externally altered so that the opened file is no longer valid.</span>
<span class="c1"># (returned for empty file)</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">raise</span>
<span class="k">return</span> <span class="n">buffer</span>
<span class="k">def</span> <span class="nf">get_file_hash2</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span> <span class="c1">#POC: name/API will change/disapear</span>
<span class="n">f</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s2">&quot;rb&quot;</span><span class="p">)</span>
<span class="n">handle</span> <span class="o">=</span> <span class="n">windows</span><span class="o">.</span><span class="n">utils</span><span class="o">.</span><span class="n">get_handle_from_file</span><span class="p">(</span><span class="n">f</span><span class="p">)</span>
<span class="n">cathand</span> <span class="o">=</span> <span class="n">HANDLE</span><span class="p">()</span>
<span class="n">h</span> <span class="o">=</span> <span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminAcquireContext2</span><span class="p">(</span><span class="n">cathand</span><span class="p">,</span> <span class="kc">None</span><span class="p">,</span> <span class="s2">&quot;SHA256&quot;</span><span class="p">,</span> <span class="kc">None</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="nb">print</span><span class="p">(</span><span class="n">cathand</span><span class="p">)</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">DWORD</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminCalcHashFromFileHandle2</span><span class="p">(</span><span class="n">cathand</span><span class="p">,</span> <span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">size</span><span class="p">),</span> <span class="kc">None</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">buffer</span> <span class="o">=</span> <span class="p">(</span><span class="n">BYTE</span> <span class="o">*</span> <span class="n">size</span><span class="o">.</span><span class="n">value</span><span class="p">)()</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATAdminCalcHashFromFileHandle2</span><span class="p">(</span><span class="n">cathand</span><span class="p">,</span> <span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">size</span><span class="p">),</span> <span class="n">buffer</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">WindowsError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="k">if</span> <span class="n">e</span><span class="o">.</span><span class="n">winerror</span> <span class="o">==</span> <span class="mi">1006</span><span class="p">:</span>
<span class="c1"># CryptCATAdminCalcHashFromFileHandle: [Error 1006]</span>
<span class="c1"># The volume for a file has been externally altered so that the opened file is no longer valid.</span>
<span class="c1"># (returned for empty file)</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">raise</span>
<span class="k">return</span> <span class="n">buffer</span>
<span class="k">def</span> <span class="nf">get_catalog_name_from_handle</span><span class="p">(</span><span class="n">handle</span><span class="p">):</span>
<span class="n">cat_info</span> <span class="o">=</span> <span class="n">CATALOG_INFO</span><span class="p">()</span>
<span class="n">cat_info</span><span class="o">.</span><span class="n">cbStruct</span> <span class="o">=</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">sizeof</span><span class="p">(</span><span class="n">cat_info</span><span class="p">)</span>
<span class="n">winproxy</span><span class="o">.</span><span class="n">CryptCATCatalogInfoFromContext</span><span class="p">(</span><span class="n">handle</span><span class="p">,</span> <span class="n">ctypes</span><span class="o">.</span><span class="n">byref</span><span class="p">(</span><span class="n">cat_info</span><span class="p">),</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">return</span> <span class="n">cat_info</span><span class="o">.</span><span class="n">wszCatalogFile</span>
<span class="n">SignatureData</span> <span class="o">=</span> <span class="n">namedtuple</span><span class="p">(</span><span class="s2">&quot;SignatureData&quot;</span><span class="p">,</span> <span class="p">[</span><span class="s2">&quot;signed&quot;</span><span class="p">,</span> <span class="s2">&quot;catalog&quot;</span><span class="p">,</span> <span class="s2">&quot;catalogsigned&quot;</span><span class="p">,</span> <span class="s2">&quot;additionalinfo&quot;</span><span class="p">])</span>
<span class="sd">&quot;&quot;&quot;Signature information for ``FILENAME``:</span>
<span class="sd"> * ``signed``: True if ``FILENAME`` embeds a valide signature</span>
<span class="sd"> * ``catalog``: The filename of the catalog ``FILENAME`` is part of (if any)</span>
<span class="sd"> * ``catalogsigned``: True if ``catalog`` embeds a valide signature</span>
<span class="sd"> * ``additionalinfo``: The return error of ``check_signature(FILENAME)``</span>
<span class="sd">``additionalinfo`` is useful to know if ``FILENAME`` signature was rejected for an invalid root / expired cert.</span>
<span class="sd">&quot;&quot;&quot;</span>
<div class="viewcode-block" id="full_signature_information"><a class="viewcode-back" href="../../wintrust.html#windows.wintrust.full_signature_information">[docs]</a><span class="k">def</span> <span class="nf">full_signature_information</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Returns more information about the signature of ``filename``</span>
<span class="sd"> :return: :class:`SignatureData`</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">check_sign</span> <span class="o">=</span> <span class="n">check_signature</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="n">signed</span> <span class="o">=</span> <span class="ow">not</span> <span class="nb">bool</span><span class="p">(</span><span class="n">check_sign</span><span class="p">)</span>
<span class="n">catalog</span> <span class="o">=</span> <span class="n">get_catalog_for_filename</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="k">if</span> <span class="n">catalog</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="n">SignatureData</span><span class="p">(</span><span class="n">signed</span><span class="p">,</span> <span class="kc">None</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="n">check_sign</span><span class="p">)</span>
<span class="n">catalogsigned</span> <span class="o">=</span> <span class="ow">not</span> <span class="nb">bool</span><span class="p">(</span><span class="n">check_signature</span><span class="p">(</span><span class="n">catalog</span><span class="p">))</span>
<span class="k">return</span> <span class="n">SignatureData</span><span class="p">(</span><span class="n">signed</span><span class="p">,</span> <span class="n">catalog</span><span class="p">,</span> <span class="n">catalogsigned</span><span class="p">,</span> <span class="n">check_sign</span><span class="p">)</span></div>
<div class="viewcode-block" id="is_signed"><a class="viewcode-back" href="../../wintrust.html#windows.wintrust.is_signed">[docs]</a><span class="k">def</span> <span class="nf">is_signed</span><span class="p">(</span><span class="n">filename</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Check if ``filename`` is signed:</span>
<span class="sd"> * File embeds a valid signature</span>
<span class="sd"> * File is part of a signed catalog file</span>
<span class="sd"> :return: :class:`bool`</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">check_sign</span> <span class="o">=</span> <span class="n">check_signature</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="k">if</span> <span class="n">check_sign</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="n">catalog</span> <span class="o">=</span> <span class="n">get_catalog_for_filename</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="k">if</span> <span class="n">catalog</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="n">catalogsigned</span> <span class="o">=</span> <span class="ow">not</span> <span class="nb">bool</span><span class="p">(</span><span class="n">check_signature</span><span class="p">(</span><span class="n">catalog</span><span class="p">))</span>
<span class="k">return</span> <span class="n">catalogsigned</span></div>
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