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Use Certificate and Private Key PEM Files to Create a Digital SignatureDemonstrates how to load a digital certificate from a PEM file, load it's corresponding private key from a PEM file, save the private key to a key container (if necessary), link the certificate to the key container, and use it to create a digital signature.
use chilkat(); $cert = new chilkat::CkCert(); # Load the cert from a PEM file; $cert->LoadFromFile("cert.pem"); $pkey = new chilkat::CkPrivateKey(); # Load the private key from an RSA PEM file: $pkey->LoadPemFile("pkey_rsa.pem"); $success = $cert->SetPrivateKey($pkey); if ($success != 1) { print $cert->lastErrorText() . "\r\n"; exit; } # Use Chilkat Crypt (a non-freeware component) to create # a digital signature using the certificate w/ private key: $crypt = new chilkat::CkCrypt2(); # Any string argument automatically begins the 30-day trial. $success = $crypt->UnlockComponent("30-day trial"); if ($success != 1) { print $crypt->lastErrorText() . "\r\n"; exit; } # Tell the crypt component to use this cert. $crypt->SetSigningCert($cert); # A PKCS7 signature for any type of file content can be created: $success = $crypt->CreateP7S("license.rtf","license.p7s"); if ($success == 0) { print $crypt->lastErrorText() . "\r\n"; exit; } print $crypt->lastErrorText() . "\r\n"; # Verify and restore the original file: $crypt->SetVerifyCert($cert); $success = $crypt->VerifyP7S("license.rtf","license.p7s"); if ($success == 0) { print $crypt->lastErrorText() . "\r\n"; exit; } print "Success!" . "\n"; |
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