https://wiki.eclipse.org/index.php?title=Security:_Privileged_instructions&feed=atom&action=history
Security: Privileged instructions - Revision history
2024-03-19T13:25:38Z
Revision history for this page on the wiki
MediaWiki 1.26.4
https://wiki.eclipse.org/index.php?title=Security:_Privileged_instructions&diff=40901&oldid=prev
Habeck.us.ibm.com at 16:07, 27 June 2007
2007-06-27T16:07:47Z
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 16:07, 27 June 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l7" >Line 7:</td>
<td colspan="2" class="diff-lineno">Line 7:</td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> <li><b>Treat the privileged instruction as a trusted library</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> <li><b>Treat the privileged instruction as a trusted library</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> function.</b> In this case, only the classes on the <del class="diffchange diffchange-inline">executiton </del>stack at and below the call to AccessController.doPrivileged will require the permissions.  </div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> function.</b> In this case, only the classes on the <ins class="diffchange diffchange-inline">execution </ins>stack at and below the call to AccessController.doPrivileged will require the permissions.  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> This process entails:</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> This process entails:</div></td></tr>
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Habeck.us.ibm.com
https://wiki.eclipse.org/index.php?title=Security:_Privileged_instructions&diff=40181&oldid=prev
Habeck.us.ibm.com at 20:40, 22 June 2007
2007-06-22T20:40:44Z
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 20:40, 22 June 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l7" >Line 7:</td>
<td colspan="2" class="diff-lineno">Line 7:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><ol></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><ol></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> <li><b>Treat the privileged instruction as a trusted library</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> <li><b>Treat the privileged instruction as a trusted library</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> function.</b> <del class="diffchange diffchange-inline"><br /></del></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> function.</b> <ins class="diffchange diffchange-inline">In this case, only the classes on the executiton stack at and below the call to AccessController.doPrivileged will require the permissions. </ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline"> <br /></del></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> This <ins class="diffchange diffchange-inline">process </ins>entails:</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> This entails:</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> <ol></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> <ol></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <li><del class="diffchange diffchange-inline">wrapping </del>the privileged operation in a <i>privileged</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <li><ins class="diffchange diffchange-inline">Wrapping </ins>the privileged operation in a <i>privileged</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> action</i></li></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> action</i></li></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> <li>Adding the required permissions to the associated codebase in</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> <li>Adding the required permissions to the associated codebase in</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l22" >Line 22:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> required privilege. Any class which does not have the required</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> required privilege. Any class which does not have the required</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> permission assignment at runtime will throw a security exception.</li></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div> permission assignment at runtime will throw a security exception.</li></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <li><b><del class="diffchange diffchange-inline">Refactor </del>the code so that option one is viable.</b></li></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <li><b><ins class="diffchange diffchange-inline">Remove the privileged instruction, or refactor </ins>the code so that option one is viable.</b></li></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></ol></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></ol></div></td></tr>
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Habeck.us.ibm.com
https://wiki.eclipse.org/index.php?title=Security:_Privileged_instructions&diff=39760&oldid=prev
Mwflaher.us.ibm.com at 20:04, 19 June 2007
2007-06-19T20:04:38Z
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 20:04, 19 June 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l28" >Line 28:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br /></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br /></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><p>The goal of security enablement is follow the <del class="diffchange diffchange-inline">"</del>Principle of Least</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><p>The goal of security enablement is follow the <ins class="diffchange diffchange-inline">[http://en.wikipedia.org/wiki/Least_privilege </ins>Principle of Least Privilege<ins class="diffchange diffchange-inline">]</ins>, and only grant the permissions which are actually required</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Privilege<del class="diffchange diffchange-inline">"</del>, and only grant the permissions which are actually required</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>to perform a given task, rather than granting all permission, or</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>to perform a given task, rather than granting all permission, or</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>conversely granting too few permissions which would result in runtime</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>conversely granting too few permissions which would result in runtime</div></td></tr>
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Mwflaher.us.ibm.com
https://wiki.eclipse.org/index.php?title=Security:_Privileged_instructions&diff=39623&oldid=prev
Habeck.us.ibm.com at 21:21, 18 June 2007
2007-06-18T21:21:58Z
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 21:21, 18 June 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l79" >Line 79:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Equinox]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Equinox]]</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Security|<del class="diffchange diffchange-inline">KeyStore support for Eclipse</del>]]</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Security|<ins class="diffchange diffchange-inline">Privileged instructions</ins>]]</div></td></tr>
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Habeck.us.ibm.com
https://wiki.eclipse.org/index.php?title=Security:_Privileged_instructions&diff=39622&oldid=prev
Habeck.us.ibm.com at 21:20, 18 June 2007
2007-06-18T21:20:40Z
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 21:20, 18 June 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l77" >Line 77:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[http://domino.research.ibm.com/comm/research_projects.nsf/pages/javasec.resources.html/$FILE/java2network_security.pdf Additional references]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[http://domino.research.ibm.com/comm/research_projects.nsf/pages/javasec.resources.html/$FILE/java2network_security.pdf Additional references]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Equinox]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Security|KeyStore support for Eclipse]]</ins></div></td></tr>
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https://wiki.eclipse.org/index.php?title=Security:_Privileged_instructions&diff=39621&oldid=prev
Habeck.us.ibm.com: New page: Java 2 Security provides fine grained access control to system and network resources. When a privileged instruction (An instruction which requires one or more J2SE permissions in order to ...
2007-06-18T21:07:07Z
<p>New page: Java 2 Security provides fine grained access control to system and network resources. When a privileged instruction (An instruction which requires one or more J2SE permissions in order to ...</p>
<p><b>New page</b></p><div>Java 2 Security provides fine grained access control to system and<br />
network resources. When a privileged instruction (An instruction which requires one or<br />
more J2SE permissions in order to execute without throwing a<br />
SecurityException at runtime) is coded into a plug-in or bundle, there<br />
are three possible courses of action the developer must take to address<br />
the associated permission requirements:<br />
<ol><br />
<li><b>Treat the privileged instruction as a trusted library<br />
function.</b> <br /><br />
<br /><br />
This entails:<br />
<ol><br />
<li>wrapping the privileged operation in a <i>privileged<br />
action</i></li><br />
<li>Adding the required permissions to the associated codebase in<br />
the java policy file (i.e. OSGi permissions file(s) for Eclipse<br />
Plug-ins).</li><br />
</ol><br />
</li><br />
<li><b>Add the required permissions to the java policy file.</b><br />
In this scenario, all classes on the execution stack must have the<br />
required privilege. Any class which does not have the required<br />
permission assignment at runtime will throw a security exception.</li><br />
<li><b>Refactor the code so that option one is viable.</b></li><br />
</ol><br />
<br />
<b>Deciding which approach to take</b><br />
<br /><br />
<br /><br />
<p>The goal of security enablement is follow the "Principle of Least<br />
Privilege", and only grant the permissions which are actually required<br />
to perform a given task, rather than granting all permission, or<br />
conversely granting too few permissions which would result in runtime<br />
security exceptions. An common attribute of well designed security<br />
enabled application is not to unnecessarily propagate permission<br />
requirements from libraries, bundles and plug-ins thereby reducing the<br />
complexity of using the associated exported packages.<br />
<p>The simplest approach is to grant the required permission(s) in<br />
the bundle policy file. However, this will require that all classes<br />
calling the method also be granted the required permission, and<br />
increases the complexity of use for any users of the associated library,<br />
bundle, or plug-in.</p><br />
<p>Alternatively, creating a trusted library requires more work on<br />
the developers part to ensure that they are not unintentionally<br />
elevating the privileges of callers. This ultimately results in more<br />
consumable, easier to use libraries, bundles, and plug-ins. To determine<br />
if it is safe to create a "trusted library", the developer must perform<br />
the following tasks:</p><br />
<ul><br />
<li><b>Check for tainted variables</b> A privileged operation<br />
typically uses parameters, such as filenames , URLs, user names, and<br />
other inputs. The source of these inputs can be "tainted" data coming<br />
from untrusted sources. Example sources are method parameters (supplied<br />
by caller) and other objects which return values (e.g. A FileDialog<br />
which prompts to the user to supply a path and filename from the<br />
file-system). This is the "tainted variable" concept. Each call path<br />
must be analyzed to determine what code-bases (.jar files and classes)<br />
ultimately make use of a given method. Additionally, the developer must<br />
analyze each path to determine if tainted objects along the associated<br />
call paths are referenced by the associated privileged instruction.</li><br />
<li><b>Review Method visibility and Access modifiers</b> If a<br />
method is public, then any class capable of loading the class with the<br />
privileged operation can call it's methods. Great care should be taken<br />
when implementing a publicly visible trusted library method to avoid<br />
unintentionally elevating the privileges of the caller.</li><br />
<li><b>Review object mutability characteristics</b> Objects which<br />
are intended to be constants after construction should be reviewed, and<br />
documented. Examples of how objects become mutable are getter/setter<br />
methods which modify the objects, or contain objects with fields that<br />
can be modified.</li><br />
</ul><br />
<p>Finally, if creating a trusted library is desirable but not<br />
advisable due to any of the above tasks turning up problems, refactoring<br />
the code to remove taint flows, correct mutability problems, or remove<br />
privileged instructions is necessary.</p><br />
<br />
<br />
[http://domino.research.ibm.com/comm/research_projects.nsf/pages/javasec.resources.html/$FILE/java2network_security.pdf Additional references]</div>
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