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(PHP ActiveX) Validate JWS Using RSASSA-PKCS1-v1_5 SHA-256Validates a JSON Web Signature (JWS) that uses RSASSA-PKCS1-v1_5 SHA-256. Note: This example requires Chilkat v9.5.0.66 or greater.
<?php // This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Note: This example requires Chilkat v9.5.0.66 or greater. // This example takes a JSON signature in compact serialization format, // and uses an RSA public key to validate and recover the protected header and payload. // We only need a public key for signature validation. This is the RSA public key // that is used: // {"kty":"RSA", // "n":"ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx // HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs // D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH // SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV // MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8 // NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ", // "e":"AQAB" // } // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbPubKey = new COM("Chilkat.StringBuilder"); $sbPubKey->Append('{\'kty\':\'RSA\','); $sbPubKey->Append('\'n\':\'ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx'); $sbPubKey->Append('HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs'); $sbPubKey->Append('D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH'); $sbPubKey->Append('SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV'); $sbPubKey->Append('MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8'); $sbPubKey->Append('NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ\','); $sbPubKey->Append('\'e\':\'AQAB\''); $sbPubKey->Append('}'); // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PublicKey') $pubKey = new COM("Chilkat.PublicKey"); $success = $pubKey->LoadFromString($sbPubKey->getAsString()); if ($success != 1) { print $pubKey->LastErrorText . "\n"; exit; } // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Jws') $jws = new COM("Chilkat.Jws"); // Set the RSA public key: $signatureIndex = 0; $jws->SetPublicKey($signatureIndex,$pubKey); // Load the JWS. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbJws = new COM("Chilkat.StringBuilder"); $sbJws->Append('eyJhbGciOiJSUzI1NiJ9'); $sbJws->Append('.'); $sbJws->Append('eyJpc3MiOiJqb2UiLA0KICJleHAiOjEzMDA4MTkzODAsDQogImh0dHA6Ly9leGFt'); $sbJws->Append('cGxlLmNvbS9pc19yb290Ijp0cnVlfQ'); $sbJws->Append('.'); $sbJws->Append('cC4hiUPoj9Eetdgtv3hF80EGrhuB__dzERat0XF9g2VtQgr9PJbu3XOiZj5RZmh7'); $sbJws->Append('AAuHIm4Bh-0Qc_lF5YKt_O8W2Fp5jujGbds9uJdbF9CUAr7t1dnZcAcQjbKBYNX4'); $sbJws->Append('BAynRFdiuB--f_nZLgrnbyTyWzO75vRK5h6xBArLIARNPvkSjtQBMHlb1L07Qe7K'); $sbJws->Append('0GarZRmB_eSN9383LcOLn6_dO--xi12jzDwusC-eOkHWEsqtFZESc6BfI7noOPqv'); $sbJws->Append('hJ1phCnvWh6IeYI2w9QOYEUipUTI8np6LbgGY9Fs98rqVt5AXLIhWkWywlVmtVrB'); $sbJws->Append('p0igcN_IoypGlUPQGe77Rw'); $success = $jws->LoadJwsSb($sbJws); if ($success != 1) { print $jws->LastErrorText . "\n"; exit; } // Validate the 1st (and only) signature at index 0.. $v = $jws->Validate($signatureIndex); if ($v < 0) { // Perhaps Chilkat was not unlocked or the trial expired.. print 'Method call failed for some other reason.' . "\n"; print $jws->LastErrorText . "\n"; exit; } if ($v == 0) { print 'Invalid signature. The RSA key was incorrect, the JWS was invalid, or both.' . "\n"; exit; } // If we get here, the signature was validated.. print 'Signature validated.' . "\n"; print '--' . "\n"; // Recover the original content: print 'Recovered content:' . "\n"; print $jws->getPayload('utf-8') . "\n"; print '--' . "\n"; // Examine the protected header: // joseHeader is a Chilkat.JsonObject $joseHeader = $jws->GetProtectedHeader($signatureIndex); if ($jws->LastMethodSuccess != 1) { print 'No protected header found at the given index.' . "\n"; exit; } $joseHeader->EmitCompact = 0; print 'Protected (JOSE) header:' . "\n"; print $joseHeader->emit() . "\n"; // Output: // Signature validated. // -- // Recovered content: // {"iss":"joe", // "exp":1300819380, // "http://example.com/is_root":true} // -- // Protected (JOSE) header: // { // "alg": "RS256" // } ?> |
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