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I used openssl command line tool to generate a CA signed certificate. now I need to tamper it to generate the signature mismatch error.

Is there any tool available to tamper the X509 certificate.

Balamurugan
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  • here are the locations of the stores, if you are using Windows. http://msdn.microsoft.com/en-us/library/windows/desktop/aa388136(v=vs.85).aspx . Find your store and look for a key that matches your thumbprint. If you modify the blob i think that should do it. – Brandon.Staley Apr 08 '14 at 12:15
  • @Brandon.Staley can you tell me how to modify the blob – Balamurugan Apr 10 '14 at 08:23

1 Answers1

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Open certificate file in ASN.1 Editor, find commonName node, right-click it and choose "Edit...":

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Change the text of commonName field:

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Hit OK, save your changes and there you are:

enter image description here

jariq
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