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How to check X509 certificate?

I need to write a tool that checks if the X509 certificate is valid (input = cert path / subject and password). How can i do this? I don’t know much about certificates ...

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c # certificate x509certificate
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3 answers

Take a look at X509Certificate2.Verify ()

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In general, RFC 3280 contains almost complete instructions for performing validation, but these instructions are very nontrivial. In addition, you will need to read the RFC 2560 (OCSP) and implement the OCSP client.

For most tasks you will find our TElX509CertificateValidator component perfectly suited. It checks certificate paths, CRL revocation, and OCSP paths (and also verifies CRL validity and OCSP responses). It is flexible enough and powerful enough and allows you to perform additional, deeper checks at every step. Also, this component can work with both Windows certificate stores and any other certificates, certificate chains, and stores that can be stored in files or in memory.

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I just looked at this exact problem, and you can look at the RSA / BSAFE / api library

which, I believe, is free. https://community.emc.com/message/12558#12558

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