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Rsa key and exponents for key verification. RRS feed

  • Question

  • HI,

    I like to do a lot of stuff related to decompiling, recently while i was decompiling a project, in the key verification section i found  the following value assigned to a 

    <?xml version="1.0"?><RSAParameters xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><Exponent>AQAB</Exponent>

    <Modulus>mRclCj5NkB4EyUA+kRjAwTFiSv92eaMpydkNxq7W33X39BchFRC0auTLrmanXZt5wpdcM9pqw5jSciUf9lqGvTfizH4PenRYBvqOgm6U0/kyVx0LlrTuVlIsRjKffsGHXff6EOy1T0+Yp3SQEYStFjQgEIHIxDYzWQ+FokwkoGk=</Modulus>
      <P>zPGCnB7uQAZqjtE6JP1W5ad3fp02r6k7IedhAyeHZdCRZbJK6k3c5JS5TFVpFYq9G+FzQO1hhx6Zf5V4KJjXFw==</P>
      <Q>vzqnOj0gPxgnPiqmmTGKM4aFVcY3wmVOk3ts+blpAddn5e2GA6HiJ9CYXxWPyjcNTmGHxHvklpvU80X9cTD0fw==</Q>
      <DP>F6QkdO38fdY/pInuMyYmSAexeSGZlVnoQFj4j+yXad9NZnXSvoSM3rFpTqzrmliOyBCRwwOfJH8bJeSQH97BsQ==</DP>
      <DQ>DKVmVbWhIksInVXYupzKFOo6exemrFZiweIRrNoUFakXF9+DU04rVJK44ODeJ3NIj/xnLBk9XrBjfssMHaYtJQ==</DQ>
      <InverseQ>VT8ybe0ncZi7ejw5N7k3Yqc+7D5S2Lv4ctyWTqV70gVzfqdzR1DTpaE56B8Fghm/aj3s2HPqP6banBxtEMAsxA==</InverseQ>
    <D>CBUUu4m2hplPH2Do7Lgl1Q1KZzM9igZ3OlTfSVIJvhp4UMa31GjhXZNevYJl66c9smxTTdmGMXVsBuK24Ua+PkI+ji/UZSq5MdqKF0c82qnBERMs7ZM6RY8xg8symEleZe5DhYVp4Mfreef4sWhjk8jAh1XdpMad+6TxxxJTgVE=</D>
    </RSAParameters>

    I know it is something related to the Rsa Algorithm and some encryption. But i cant find anything related to my requirement. So any related details would be very helpful.

    Also few days before i downloaded a keygen which worked only on using a xml file which consisted of the following datas.


    <Project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <PrivateKey>&lt;?xml version="1.0"?&gt;
    &lt;RSAParameters xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

    xmlns:xsd="http://www.w3.org/2001/XMLSchema"&gt;
      &lt;Exponent&gt;AQAB&lt;/Exponent&gt;
      &lt;Modulus&gt;mRclCj5NkB4EyUA

    +kRjAwTFiSv92eaMpydkNxq7W33X39BchFRC0auTLrmanXZt5wpdcM9pqw5jSciUf9lqGvTfizH4PenRYBvqOgm6U0/kyVx0LlrT

    uVlIsRjKffsGHXff6EOy1T0+Yp3SQEYStFjQgEIHIxDYzWQ+FokwkoGk=&lt;/Modulus&gt;
      &lt;P&gt;zPGCnB7uQAZqjtE6JP1W5ad3fp02r6k7IedhAyeHZdCRZbJK6k3c5JS5TFVpFYq9G

    +FzQO1hhx6Zf5V4KJjXFw==&lt;/P&gt;
      &lt;Q&gt;vzqnOj0gPxgnPiqmmTGKM4aFVcY3wmVOk3ts

    +blpAddn5e2GA6HiJ9CYXxWPyjcNTmGHxHvklpvU80X9cTD0fw==&lt;/Q&gt;
      &lt;DP&gt;F6QkdO38fdY/pInuMyYmSAexeSGZlVnoQFj4j

    +yXad9NZnXSvoSM3rFpTqzrmliOyBCRwwOfJH8bJeSQH97BsQ==&lt;/DP&gt;
      

    &lt;DQ&gt;DKVmVbWhIksInVXYupzKFOo6exemrFZiweIRrNoUFakXF9+DU04rVJK44ODeJ3NIj/xnLBk9XrBjfssMHaYtJQ==

    &lt;/DQ&gt;
      &lt;InverseQ&gt;VT8ybe0ncZi7ejw5N7k3Yqc

    +7D5S2Lv4ctyWTqV70gVzfqdzR1DTpaE56B8Fghm/aj3s2HPqP6banBxtEMAsxA==&lt;/InverseQ&gt;
      &lt;D&gt;CBUUu4m2hplPH2Do7Lgl1Q1KZzM9igZ3OlTfSVIJvhp4UMa31GjhXZNevYJl66c9smxTTdmGMXVsBuK24Ua+PkI

    +ji/UZSq5MdqKF0c82qnBERMs7ZM6RY8xg8symEleZe5DhYVp4Mfreef4sWhjk8jAh1XdpMad+6TxxxJTgVE=&lt;/D&gt;
    &lt;/RSAParameters&gt;
    </PrivateKey>


      <ProductId>0</ProductId>

      <ProductFeatures />

      <TrialDays>1</TrialDays>
      <StartSerialId>1</StartSerialId>
      <SerialsToGenerate>1</SerialsToGenerate>
      <ExpirationDate xsi:nil="true" />
      <Expires>false</Expires>
    </Project>

    Im not able to understand that what the above lines mean. But the keygen doesnt work without the above xml file. Any explanation??

    -Thanks

    Viknesh


    Thursday, September 20, 2012 10:41 AM

Answers