(Perl) 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.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# 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 = chilkat::CkStringBuilder->new();
$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 = chilkat::CkPrivateKey->new();
# 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 != 1) {
    print $rsaKey->lastErrorText() . "\r\n";
    exit;
}

# ---------------------------------------------------
# Use the following ECC key loaded from JWK format.
$sbEccJwk = chilkat::CkStringBuilder->new();
$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 = chilkat::CkPrivateKey->new();
# 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 != 1) {
    print $eccKey->lastErrorText() . "\r\n";
    exit;
}

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

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

# ECDSA using P-256 and SHA-256
$jwsProtHdr1 = chilkat::CkJsonObject->new();
$jwsProtHdr1->AppendString("alg","ES256");
$jwsUnprotHdr1 = chilkat::CkJsonObject->new();
$jwsUnprotHdr1->AppendString("kid","myEcKey");

# HMAC using SHA-256
$jwsProtHdr2 = chilkat::CkJsonObject->new();
$jwsProtHdr2->AppendString("alg","HS256");
$jwsUnprotHdr2 = chilkat::CkJsonObject->new();
$jwsUnprotHdr2->AppendString("kid","myMacKey");

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

$jws->SetProtectedHeader(0,$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 = 0;
$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() != 1) {
    print $jws->lastErrorText() . "\r\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 = chilkat::CkJsonObject->new();
$json->Load($jwsStr);
$json->put_EmitCompact(0);
print $json->emit() . "\r\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"
#     }
#   ]
# }