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(PHP Extension) RSA Sign String using Private Key of Certificate Type A3 (smart card / token)Demonstrates RSA signing a string using the private key of a certificate type A3 (smart card, token). Note: This is a Windows-only example.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // First get the A3 certificate that was installed on the Windows system. $certStore = new CkCertStore(); $thumbprint = '12c1dd8015f3f03f7b1fa619dc24e2493ca8b4b2'; // This is specific to Windows because it is opening the Windows Current-User certificate store. $bReadOnly = true; $success = $certStore->OpenCurrentUserStore($bReadOnly); if ($success != true) { print $certStore->lastErrorText() . "\n"; exit; } // Find the certificate with the desired thumbprint // (There are many ways to locate a certificate. This example chooses to find by thumbprint.) // cert is a CkCert $cert = $certStore->FindCertBySha1Thumbprint($thumbprint); if ($certStore->get_LastMethodSuccess() != true) { print 'Failed to find the certificate.' . "\n"; exit; } print 'Found: ' . $cert->subjectCN() . "\n"; $rsa = new CkRsa(); // Provide the cert's private key $bUsePrivateKey = true; $success = $rsa->SetX509Cert($cert,$bUsePrivateKey); if ($success != true) { print $rsa->lastErrorText() . "\n"; exit; } // Return the RSA signature in base64 encoded form. $rsa->put_EncodingMode('base64'); // Sign the utf-8 byte representation of the string. $rsa->put_Charset('utf-8'); // You can also choose other hash algorithms, such as SHA-1. $sigBase64 = $rsa->signStringENC('text to sign','SHA-256'); if ($rsa->get_LastMethodSuccess() != true) { print $rsa->lastErrorText() . "\n"; exit; } print 'Base64 signature: ' . $sigBase64 . "\n"; ?> |
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