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(PHP Extension) RSA Encrypt Hash using SHA256 hash function and SHA1 mask functionNote: This example requires a feature introduced in Chilkat v9.5.0.66 How can this Javascript be duplicated using Chilkat? function a(e, t) { var r = s.pki.publicKeyFromPem(e) , n = r.encrypt(t, "RSA-OAEP", { md: s.md.sha256.create(), mgf1: { md: s.md.sha1.create() } }); return s.util.encode64(n) } Note: The OAEP padding uses random bytes in the padding, and therefore each time encryption happens, even using the same data and key, the result will be different -- but still valid. One should not expect to get the same output.
<?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"); // Note: This example requires a feature introduced in Chilkat v9.5.0.66 // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $pubkey = new CkPublicKey(); $sbPem = new CkStringBuilder(); $bCrlf = true; $sbPem->AppendLine('-----BEGIN PUBLIC KEY-----',$bCrlf); $sbPem->AppendLine('MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA33TqqLR3eeUmDtHS89qF',$bCrlf); $sbPem->AppendLine('3p4MP7Wfqt2Zjj3lZjLjjCGDvwr9cJNlNDiuKboODgUiT4ZdPWbOiMAfDcDzlOxA',$bCrlf); $sbPem->AppendLine('04DDnEFGAf+kDQiNSe2ZtqC7bnIc8+KSG/qOGQIVaay4Ucr6ovDkykO5Hxn7OU7s',$bCrlf); $sbPem->AppendLine('Jp9TP9H0JH8zMQA6YzijYH9LsupTerrY3U6zyihVEDXXOv08vBHk50BMFJbE9iwF',$bCrlf); $sbPem->AppendLine('wnxCsU5+UZUZYw87Uu0n4LPFS9BT8tUIvAfnRXIEWCha3KbFWmdZQZlyrFw0buUE',$bCrlf); $sbPem->AppendLine('f0YN3/Q0auBkdbDR/ES2PbgKTJdkjc/rEeM0TxvOUf7HuUNOhrtAVEN1D5uuxE1W',$bCrlf); $sbPem->AppendLine('SwIDAQAB',$bCrlf); $sbPem->AppendLine('-----END PUBLIC KEY-----',$bCrlf); // Load the public key object from the PEM. $success = $pubkey->LoadFromString($sbPem->getAsString()); if ($success != true) { print $pubkey->lastErrorText() . "\n"; exit; } $originalData = 'This is the original data to be SHA-256 hashed and RSA encrypted.'; // First we SHA-256 hash the original data to get the hash in base64 format: $crypt = new CkCrypt2(); $crypt->put_HashAlgorithm('SHA-256'); $crypt->put_EncodingMode('base64'); $hashBase64 = $crypt->hashStringENC($originalData); // Setup RSA to use OAEP padding with SHA-1 for the mask function. $rsa = new CkRsa(); $rsa->put_OaepPadding(true); $rsa->put_OaepHash('SHA1'); $rsa->ImportPublicKeyObj($pubkey); $rsa->put_EncodingMode('base64'); // Starting in v9.5.0.66, we can provide a binary encoding mode, such as "base64", "hex", "base64url", etc. // for the Charset property. The Charset property was previously limited to character encodings, such as // "utf-8", "iso-8859-1", etc. If a binary encoding is used, then the string passed in is decoded to the binary // bytes as indicated. (If an actual charset, such as "utf-8" is used, then the input string is converted to the // byte representation of the charset, and then encrypted.) // Given that a hash is composed of non-text binary bytes, we'll set the Charset property equal to "base64" // (because we have the base64 hash from above). $rsa->put_Charset('base64'); // Note: The OAEP padding uses random bytes in the padding, and therefore each time encryption happens, // even using the same data and key, the result will be different -- but still valid. One should not expect // to get the same output. $bUsePrivateKey = false; $encryptedStr = $rsa->encryptStringENC($hashBase64,$bUsePrivateKey); if ($rsa->get_LastMethodSuccess() != true) { print $rsa->lastErrorText() . "\n"; exit; } print 'Base64 RSA encrypted output: ' . $encryptedStr . "\n"; ?> |
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