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<a class="user-hover" rel="ian@iay.org.uk" id="email_ian@iay.org.uk" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=ian%40iay.org.uk" style="color:#326ca6;">Ian Young</a>
created <img src="https://issues.shibboleth.net/jira/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#326ca6;text-decoration:none;' href='https://issues.shibboleth.net/jira/browse/JSPT-49'>JSPT-49</a>
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<a style='color:#326ca6;text-decoration:none;' href='https://issues.shibboleth.net/jira/browse/JSPT-49'><strong>array bounds exception in IPRange constructor</strong></a>
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<strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
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<img src="https://issues.shibboleth.net/jira/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug"> Bug
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<strong style="font-weight:normal;color:#505050;">Affects Versions:</strong>
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4.0.0 </td>
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<strong style="font-weight:normal;color:#505050;">Assignee:</strong>
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<a class="user-hover" rel="putmanb@shibboleth.net" id="email_putmanb@shibboleth.net" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=putmanb%40shibboleth.net" style="color:#326ca6;">Brent Putman</a>
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<strong style="font-weight:normal;color:#505050;">Components:</strong>
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net </td>
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<strong style="font-weight:normal;color:#505050;">Created:</strong>
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14/Nov/14 9:55 AM
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<strong style="font-weight:normal;color:#505050;">Description:</strong>
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<p style='margin-top:0;margin-bottom:10px;'>The Javadoc is not as explicit as I'd like, but I think the contract of <tt>IPRange.parseCIDRBlock</tt> is intended to be that it either returns an <tt>IPRange</tt> object or throws <tt>IllegalArgumentException</tt> saying why not.</p>
<p style='margin-top:0;margin-bottom:10px;'>In practice, if you pass it something like "1.2.3.4" (not no '/n' component saying the size of the mask) then it throws an <tt>ArrayIndexOutOfBoundsException</tt> from line 179:</p>
<p style='margin-top:0;margin-bottom:10px;'> <tt>int maskSize = Integer.parseInt(blockParts<span class="error">[1]</span>);</tt></p>
<p style='margin-top:0;margin-bottom:10px;'>which a caller probably isn't expecting and which is certainly unhelpful, as it won't indicate the erroneous CIDR string, the source context (probably somewhere in a configuration file) or really anything else.</p>
<p style='margin-top:0;margin-bottom:10px;'>There are two things we could do to fix this.</p>
<p style='margin-top:0;margin-bottom:10px;'>Route 1 would be to explicitly throw an <tt>IllegalArgumentException</tt> immediately after this line, if the array size is other than 2:</p>
<p style='margin-top:0;margin-bottom:10px;'><tt>String[] blockParts = block.split("/");</tt></p>
<p style='margin-top:0;margin-bottom:10px;'>This would mean that "1.2.3.4" would be rejected and "1.2.3.4/27/52" would also be detected. I guess one might want two reason messages in those cases though.</p>
<p style='margin-top:0;margin-bottom:10px;'>The other alternative would be to special-case an array size of 1, and take it as meaning the block of size one (equivalent to "1.2.3.4/32" or "1:2::/128" as appropriate). I'm not sure that's what I'd expect an <tt>IPRange</tt> parser to return, though, and my preference would be to go with the first option.</p>
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<strong style="font-weight:normal;color:#505050;">Project:</strong>
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<a style="color:#326ca6;" href="https://issues.shibboleth.net/jira/browse/JSPT">Java Support</a>
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<strong style="font-weight:normal;color:#505050;">Priority:</strong>
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<img src="https://issues.shibboleth.net/jira/images/icons/priorities/major.png" height="16" width="16" border="0" align="absmiddle" alt="Major"> Major
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<strong style="font-weight:normal;color:#505050;">Reporter:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
<a class="user-hover" rel="ian@iay.org.uk" id="email_ian@iay.org.uk" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=ian%40iay.org.uk" style="color:#326ca6;">Ian Young</a>
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