Hello,

> My application will receive some piece of data signed with a private key of
> a user. I have the certificate of this user.
> 
> When that data comes, how do I decrypt the signature with the public key
> (contained in the certificate - right?)? What functions to call?
If you want to do this with OpenSSL API
you may use RSA_verify() function (with RSA key from certificate).

Best regards,
-- 
Marek Marcola <[EMAIL PROTECTED]>

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