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Create PKCS1 RSA Signature with PEM Private KeyDemonstrates how to load a private key from a PEM file and create a PKCS1 RSA digital signature.
use chilkat; $pkey = new chilkat::CkPrivateKey(); # Load the private key from an RSA PEM file: $pkey->LoadPemFile("pvkey2_rsa.pem"); # Get the private key in XML format: $pkeyXml = $pkey->getXml(); $rsa = new chilkat::CkRsa(); # Any string argument automatically begins the 30-day trial. $success = $rsa->UnlockComponent("30-day trial"); if ($success != 1) { print "RSA component unlock failed" . "\n"; exit; } # Import the private key into the RSA component: $success = $rsa->ImportPrivateKey($pkeyXml); if ($success != 1) { print $rsa->lastErrorText() . "\n"; exit; } # This example will sign a string, and receive the signature # in a hex-encoded string. Therefore, set the encoding mode # to "hex": $rsa->put_EncodingMode("hex"); $strData = "This is the string to be signed."; # Sign the string using the sha-1 hash algorithm. # Other valid choices are "md2" and "md5". $hexSig = $rsa->signStringENC($strData,"sha-1"); print $hexSig . "\r\n"; print "Success!" . "\n"; |
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