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(PHP ActiveX) RSAES-OAEP Encrypt String with AES-128 Content Encryption and SHA256Encrypts a string using RSAES-OAEP with SHA256 and AES-128 content encryption to produce PKCS7 output (base64 encoded). Note: This example requires Chilkat v9.5.0.67 or greater.
<?php // This example requires the Chilkat Crypt API to have been previously unlocked. // See Unlock Chilkat Crypt for sample code. // First build a string to be encrypted // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sb = new COM("Chilkat.StringBuilder"); $i = 1; while ($i < 25) { $sb->AppendInt($i); $sb->Append(' the quick brown fox jumped over the lazy dog.\r\n'); $i = $i + 1; } print $sb->getAsString() . "\n"; // The string to be encrypted looks like this: // 1 the quick brown fox jumped over the lazy dog. // 2 the quick brown fox jumped over the lazy dog. // 3 the quick brown fox jumped over the lazy dog. // 4 the quick brown fox jumped over the lazy dog. // 5 the quick brown fox jumped over the lazy dog. // 6 the quick brown fox jumped over the lazy dog. // ... // Load a digital certificate. // We don't need the private key for encryption. // Only the public key is needed (which is included in a certificate). // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Cert') $cert = new COM("Chilkat.Cert"); $success = $cert->LoadFromFile('qa_data/rsaes-oaep/cert.pem'); if ($success != 1) { print $cert->LastErrorText . "\n"; exit; } // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2') $crypt = new COM("Chilkat.Crypt2"); // Tell the crypt object to use the certificate. $crypt->SetEncryptCert($cert); // Indicate that we want PKI encryption (i.e. public-key infrastructure) // to produce a CMS message (Cryptographic Message Syntax/PKCS7), // that is be created with RSAES-OAEP padding, SHA256, and AES-128 for the // bulk encryption. $crypt->CryptAlgorithm = 'pki'; $crypt->Pkcs7CryptAlg = 'aes'; $crypt->KeyLength = 128; $crypt->OaepHash = 'sha256'; $crypt->OaepPadding = 1; // Also, don't forget to be specific about the character encoding (byte representation) of the // string to be encrypted. $crypt->Charset = 'utf-8'; // Now indicate that the PKCS7 output is to be returned in the base64 encoding. $crypt->EncodingMode = 'base64'; $base64Pkcs7 = $crypt->encryptStringENC($sb->getAsString()); if ($crypt->LastMethodSuccess != 1) { print $crypt->LastErrorText . "\n"; exit; } // Show the output print $base64Pkcs7 . "\n"; // This base64 can be copy-and-pasted into the form at http://lapo.it/asn1js/ // to verify that all the chosen algorithms were indeed used. print 'OK.' . "\n"; ?> |
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