(PHP Extension) Create JWS with Multiple Signatures using the General JSON Serialization Format

Creates a JSON Web Signature (JWS) containing 3 signatures and output using the general JSON serialization format.

Chilkat supports all of the following JWS algorithms:

   +--------------+-------------------------------+--------------------+
   | "alg" Param  | Digital Signature or MAC      | Implementation     |
   | Value        | Algorithm                     | Requirements       |
   +--------------+-------------------------------+--------------------+
   | HS256        | HMAC using SHA-256            | Required           |
   | HS384        | HMAC using SHA-384            | Optional           |
   | HS512        | HMAC using SHA-512            | Optional           |
   | RS256        | RSASSA-PKCS1-v1_5 using       | Recommended        |
   |              | SHA-256                       |                    |
   | RS384        | RSASSA-PKCS1-v1_5 using       | Optional           |
   |              | SHA-384                       |                    |
   | RS512        | RSASSA-PKCS1-v1_5 using       | Optional           |
   |              | SHA-512                       |                    |
   | ES256        | ECDSA using P-256 and SHA-256 | Recommended+       |
   | ES384        | ECDSA using P-384 and SHA-384 | Optional           |
   | ES512        | ECDSA using P-521 and SHA-512 | Optional           |
   | PS256        | RSASSA-PSS using SHA-256 and  | Optional           |
   |              | MGF1 with SHA-256             |                    |
   | PS384        | RSASSA-PSS using SHA-384 and  | Optional           |
   |              | MGF1 with SHA-384             |                    |
   | PS512        | RSASSA-PSS using SHA-512 and  | Optional           |
   |              | MGF1 with SHA-512             |                    |
   +--------------+-------------------------------+--------------------+

Note: This example requires Chilkat v9.5.0.66 or greater.

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<?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");

// 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.

// The JWS to be created will contain three signatures.
// The 1st will use an ECC key, the 2nd an RSA key, and the 3rd an HMAC key.

// Prepare each key..

// ---------------------------------------------------
// Use the following RSA key loaded from JWK format.
$sbRsaJwk = new CkStringBuilder();
$sbRsaJwk->Append('{\'kty\':\'RSA\',');
$sbRsaJwk->Append('\'n\':\'ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx');
$sbRsaJwk->Append('HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs');
$sbRsaJwk->Append('D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH');
$sbRsaJwk->Append('SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV');
$sbRsaJwk->Append('MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8');
$sbRsaJwk->Append('NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ\',');
$sbRsaJwk->Append('\'e\':\'AQAB\',');
$sbRsaJwk->Append('\'d\':\'Eq5xpGnNCivDflJsRQBXHx1hdR1k6Ulwe2JZD50LpXyWPEAeP88vLNO97I');
$sbRsaJwk->Append('jlA7_GQ5sLKMgvfTeXZx9SE-7YwVol2NXOoAJe46sui395IW_GO-pWJ1O0');
$sbRsaJwk->Append('BkTGoVEn2bKVRUCgu-GjBVaYLU6f3l9kJfFNS3E0QbVdxzubSu3Mkqzjkn');
$sbRsaJwk->Append('439X0M_V51gfpRLI9JYanrC4D4qAdGcopV_0ZHHzQlBjudU2QvXt4ehNYT');
$sbRsaJwk->Append('CBr6XCLQUShb1juUO1ZdiYoFaFQT5Tw8bGUl_x_jTj3ccPDVZFD9pIuhLh');
$sbRsaJwk->Append('BOneufuBiB4cS98l2SR_RQyGWSeWjnczT0QU91p1DhOVRuOopznQ\',');
$sbRsaJwk->Append('\'p\':\'4BzEEOtIpmVdVEZNCqS7baC4crd0pqnRH_5IB3jw3bcxGn6QLvnEtfdUdi');
$sbRsaJwk->Append('YrqBdss1l58BQ3KhooKeQTa9AB0Hw_Py5PJdTJNPY8cQn7ouZ2KKDcmnPG');
$sbRsaJwk->Append('BY5t7yLc1QlQ5xHdwW1VhvKn-nXqhJTBgIPgtldC-KDV5z-y2XDwGUc\',');
$sbRsaJwk->Append('\'q\':\'uQPEfgmVtjL0Uyyx88GZFF1fOunH3-7cepKmtH4pxhtCoHqpWmT8YAmZxa');
$sbRsaJwk->Append('ewHgHAjLYsp1ZSe7zFYHj7C6ul7TjeLQeZD_YwD66t62wDmpe_HlB-TnBA');
$sbRsaJwk->Append('-njbglfIsRLtXlnDzQkv5dTltRJ11BKBBypeeF6689rjcJIDEz9RWdc\',');
$sbRsaJwk->Append('\'dp\':\'BwKfV3Akq5_MFZDFZCnW-wzl-CCo83WoZvnLQwCTeDv8uzluRSnm71I3Q');
$sbRsaJwk->Append('CLdhrqE2e9YkxvuxdBfpT_PI7Yz-FOKnu1R6HsJeDCjn12Sk3vmAktV2zb');
$sbRsaJwk->Append('34MCdy7cpdTh_YVr7tss2u6vneTwrA86rZtu5Mbr1C1XsmvkxHQAdYo0\',');
$sbRsaJwk->Append('\'dq\':\'h_96-mK1R_7glhsum81dZxjTnYynPbZpHziZjeeHcXYsXaaMwkOlODsWa');
$sbRsaJwk->Append('7I9xXDoRwbKgB719rrmI2oKr6N3Do9U0ajaHF-NKJnwgjMd2w9cjz3_-ky');
$sbRsaJwk->Append('NlxAr2v4IKhGNpmM5iIgOS1VZnOZ68m6_pbLBSp3nssTdlqvd0tIiTHU\',');
$sbRsaJwk->Append('\'qi\':\'IYd7DHOhrWvxkwPQsRM2tOgrjbcrfvtQJipd-DlcxyVuuM9sQLdgjVk2o');
$sbRsaJwk->Append('y26F0EmpScGLq2MowX7fhd_QJQ3ydy5cY7YIBi87w93IKLEdfnbJtoOPLU');
$sbRsaJwk->Append('W0ITrJReOgo1cq9SbsxYawBgfp_gh6A5603k2-ZQwVK0JKSHuLFkuQ3U\'');
$sbRsaJwk->Append('}');

$rsaKey = new CkPrivateKey();
// Note: This example loads the RSA key from JWK format.  Any format can be loaded
// into the private key object. (See the online reference documentation..)
$success = $rsaKey->LoadJwk($sbRsaJwk->getAsString());
if ($success != true) {
    print $rsaKey->lastErrorText() . "\n";
    exit;
}

// ---------------------------------------------------
// Use the following ECC key loaded from JWK format.
$sbEccJwk = new CkStringBuilder();
$sbEccJwk->Append('{\'kty\':\'EC\',');
$sbEccJwk->Append('\'crv\':\'P-256\',');
$sbEccJwk->Append('\'x\':\'f83OJ3D2xF1Bg8vub9tLe1gHMzV76e8Tus9uPHvRVEU\',');
$sbEccJwk->Append('\'y\':\'x_FEzRu9m36HLN_tue659LNpXW6pCyStikYjKIWI5a0\',');
$sbEccJwk->Append('\'d\':\'jpsQnnGQmL-YBIffH1136cspYG6-0iY7X1fCE9-E9LI\'');
$sbEccJwk->Append('}');

$eccKey = new CkPrivateKey();
// Note: This example loads the ECDSA key from JWK format.  Any format can be loaded
// into the private key object. (See the online reference documentation..)
$success = $eccKey->LoadJwk($sbEccJwk->getAsString());
if ($success != true) {
    print $eccKey->lastErrorText() . "\n";
    exit;
}

// ---------------------------------------------------
// The HMAC key (in base64url format)
$hmacKey = 'AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow';

// ---------------------------------------------------
// Prepare the headers..
// RSASSA-PKCS1-v1_5 SHA-256
$jwsProtHdr0 = new CkJsonObject();
$jwsProtHdr0->AppendString('alg','RS256');
$jwsUnprotHdr0 = new CkJsonObject();
$jwsUnprotHdr0->AppendString('kid','myRsaKey');

// ECDSA using P-256 and SHA-256
$jwsProtHdr1 = new CkJsonObject();
$jwsProtHdr1->AppendString('alg','ES256');
$jwsUnprotHdr1 = new CkJsonObject();
$jwsUnprotHdr1->AppendString('kid','myEcKey');

// HMAC using SHA-256
$jwsProtHdr2 = new CkJsonObject();
$jwsProtHdr2->AppendString('alg','HS256');
$jwsUnprotHdr2 = new CkJsonObject();
$jwsUnprotHdr2->AppendString('kid','myMacKey');

// ---------------------------------------------------
// First set the JWS headers, keys, and payload, then we'll create the JWS...
$jws = new CkJws();

$jws->SetProtectedHeader(0,$jwsProtHdr0);
$jws->SetUnprotectedHeader(0,$jwsUnprotHdr0);
$jws->SetProtectedHeader(1,$jwsProtHdr1);
$jws->SetUnprotectedHeader(1,$jwsUnprotHdr1);
$jws->SetProtectedHeader(2,$jwsProtHdr2);
$jws->SetUnprotectedHeader(2,$jwsUnprotHdr2);

$jws->SetPrivateKey(0,$rsaKey);
$jws->SetPrivateKey(1,$eccKey);
$jws->SetMacKey(2,$hmacKey,'base64url');

$bIncludeBom = false;
$payloadStr = 'In our village, folks say God crumbles up the old moon into stars.';
$jws->SetPayload($payloadStr,'utf-8',$bIncludeBom);

// ---------------------------------------------------
// Create the JWS.
// Givent that multiple signatures will exist, only the general JSON serialization 
// format is possible, and that is what will be produced.
$jwsStr = $jws->createJws();
if ($jws->get_LastMethodSuccess() != true) {
    print $jws->lastErrorText() . "\n";
    exit;
}

// The jwsStr is contains JSON in the smallest possible size, which is a single line.
// To get in human-readable format, load into a Chilkat JSON object and emit..
$json = new CkJsonObject();
$json->Load($jwsStr);
$json->put_EmitCompact(false);
print $json->emit() . "\n";

// Sample output:

// { 
//   "payload": "SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu",
//   "signatures": [
//     { 
//       "protected": "eyJhbGciOiJSUzI1NiJ9",
//       "header": { 
//         "kid": "myRsaKey"
//       },
//       "signature": "B04c24gSnpVm1Z-_bemfyNMCpZm6Knj1yB-yzaIOvijsWfDgoF_mSJccTIbzapNgwJudnobr5iDOfZWiRR9iqCyDJLe5M1S40vFF7MFEI3JecYRgrRc6n1lTkYLMRyVq48BwbQlmKgPqmK9drun3agklsr0FmgNx65pfmcnlYdXsgwxf8WbgppefrlrMImp-98-dNtBcUL8ce1aOjbcyVFjGMCzpm3JerQqIzWQvEwBstnMEQle73KHcyx_nsTmlzY70CaydbRTsciOATL7WfiMwuX1q9Y2NIpTg3CbOTWKdwjh7iyfiAKQxNBaF2mApnqj9hjpf8GwR-CfxAzJtPg"
//     },
//     { 
//       "protected": "eyJhbGciOiJFUzI1NiJ9",
//       "header": { 
//         "kid": "myEcKey"
//       },
//       "signature": "2cbugKq0ERaQMh01n2B-86EZFYleeMf8bsccaQMxzOxAg14PxfjR3IImvodTJYqkmfBJYW203etz2-7ZtJUOGw"
//     },
//     { 
//       "protected": "eyJhbGciOiJIUzI1NiJ9",
//       "header": { 
//         "kid": "myMacKey"
//       },
//       "signature": "e7R9gjx0RsUNa3c7qd8k9mQGEhtcG8vsN1W7jbLb2MA"
//     }
//   ]
// }

?>