[Ndn-interest] How to add the SecRuleRelative Rules in validator-regex?

[Chengyu Fan]

Could you tell me how the SecRuleRelative Rule works?

Specifically, what's the meaning of each parameter? What conditions the
rule will test to make a incoming data satisfy the rule?
ndn::SecRuleRelative::SecRuleRelative
<http://named-data.net/doc/ndn-cxx/0.2.0/doxygen/d6/de6/classndn_1_1SecRuleRelative.html#ae75d154107abd094ad47b9195aa3f896>
(const std::string & dataRegex,const std::string & signerRegex,const
std::string & op,const std::string & dataExpand,const std::string &
signerExpand,bool isPositive )



On Fri, Feb 27, 2015 at 1:59 PM, Alex Afanasyev <
alexander.afanasyev at ucla.edu> wrote:

>
> On Feb 27, 2015, at 12:10 PM, Chengyu Fan <chengy.fan at gmail.com> wrote:
>
> Hi,
>
> I'm trying to use the validator-regex to validate the incoming data, but I
> stuck at how to add the SecRuleRelative Rule.
>
> Can somebody tell me some clues?
>
> Specifically, I find the example in SecurityLibrary(
> http://redmine.named-data.net/projects/ndn-cxx/wiki/SecurityLibrary), but
> I don't understand the RuleRelative rule below ...
>
> SecRuleRelative rule("^(<>*)$", "^([^<KEY>]*)<KEY>(<>*)<ksk-.*><ID-CERT>$",
>                      ">", "\\1", "\\1\\2", true);
>
> What's the meaning of ">", "\\1", "\\1\\2" ? Can someone give me an
> example?
>
>
> This is just a regular expression rules.  \\1 (\1, it’s just \ needs to
> be escaped in c++) refer to th first group of the regular expression, \\2 refer
> to the second group, etc.
>
> There are many documentation sources about regexps, e.g.,
> http://www.boost.org/doc/libs/1_57_0/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html
> .
>
> The only difference in our regular expressions is the fact that it is
> defined over name components, not just strings.  There is a documentation
> for this at
> http://named-data.net/doc/ndn-cxx/current/tutorials/utils-ndn-regex.html
>
> —
> Alex
>
>
>


-- 
Thanks,

Chengyu
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