Hi , I am using X509* ** pX = * PEM_read_X509*(FILE *fp, X509 **x, pem_password_cb *cb, void *u);
to get a X509 certificate structure from PEM format File. My File(fp) looks like below: -----BEGIN CERTIFICATE----- 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 -----END CERTIFICATE----- The above api is returning me a NULL in pX and x both . Q1 ) So was wondering whether the PEM File am passing as input to the Api is correct or not ? Q2) And which amongst pX and x will give me the required X509 Certificate.? I could not find any explanation of the api on net , only got the signature so need some help for the above problem. Regards, Mayur