C
C
Create JWS with Multiple Signatures using the General JSON Serialization Format
See more JSON Web Signatures (JWS) Examples
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 C Downloads
#include <C_CkStringBuilder.h>
#include <C_CkPrivateKey.h>
#include <C_CkJsonObject.h>
#include <C_CkJws.h>
void ChilkatSample(void)
{
BOOL success;
HCkStringBuilder sbRsaJwk;
HCkPrivateKey rsaKey;
HCkStringBuilder sbEccJwk;
HCkPrivateKey eccKey;
const char *hmacKey;
HCkJsonObject jwsProtHdr0;
HCkJsonObject jwsUnprotHdr0;
HCkJsonObject jwsProtHdr1;
HCkJsonObject jwsUnprotHdr1;
HCkJsonObject jwsProtHdr2;
HCkJsonObject jwsUnprotHdr2;
HCkJws jws;
BOOL bIncludeBom;
const char *payloadStr;
const char *jwsStr;
HCkJsonObject json;
success = FALSE;
// 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 = CkStringBuilder_Create();
CkStringBuilder_Append(sbRsaJwk,"{\"kty\":\"RSA\",");
CkStringBuilder_Append(sbRsaJwk,"\"n\":\"ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx");
CkStringBuilder_Append(sbRsaJwk,"HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs");
CkStringBuilder_Append(sbRsaJwk,"D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH");
CkStringBuilder_Append(sbRsaJwk,"SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV");
CkStringBuilder_Append(sbRsaJwk,"MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8");
CkStringBuilder_Append(sbRsaJwk,"NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ\",");
CkStringBuilder_Append(sbRsaJwk,"\"e\":\"AQAB\",");
CkStringBuilder_Append(sbRsaJwk,"\"d\":\"Eq5xpGnNCivDflJsRQBXHx1hdR1k6Ulwe2JZD50LpXyWPEAeP88vLNO97I");
CkStringBuilder_Append(sbRsaJwk,"jlA7_GQ5sLKMgvfTeXZx9SE-7YwVol2NXOoAJe46sui395IW_GO-pWJ1O0");
CkStringBuilder_Append(sbRsaJwk,"BkTGoVEn2bKVRUCgu-GjBVaYLU6f3l9kJfFNS3E0QbVdxzubSu3Mkqzjkn");
CkStringBuilder_Append(sbRsaJwk,"439X0M_V51gfpRLI9JYanrC4D4qAdGcopV_0ZHHzQlBjudU2QvXt4ehNYT");
CkStringBuilder_Append(sbRsaJwk,"CBr6XCLQUShb1juUO1ZdiYoFaFQT5Tw8bGUl_x_jTj3ccPDVZFD9pIuhLh");
CkStringBuilder_Append(sbRsaJwk,"BOneufuBiB4cS98l2SR_RQyGWSeWjnczT0QU91p1DhOVRuOopznQ\",");
CkStringBuilder_Append(sbRsaJwk,"\"p\":\"4BzEEOtIpmVdVEZNCqS7baC4crd0pqnRH_5IB3jw3bcxGn6QLvnEtfdUdi");
CkStringBuilder_Append(sbRsaJwk,"YrqBdss1l58BQ3KhooKeQTa9AB0Hw_Py5PJdTJNPY8cQn7ouZ2KKDcmnPG");
CkStringBuilder_Append(sbRsaJwk,"BY5t7yLc1QlQ5xHdwW1VhvKn-nXqhJTBgIPgtldC-KDV5z-y2XDwGUc\",");
CkStringBuilder_Append(sbRsaJwk,"\"q\":\"uQPEfgmVtjL0Uyyx88GZFF1fOunH3-7cepKmtH4pxhtCoHqpWmT8YAmZxa");
CkStringBuilder_Append(sbRsaJwk,"ewHgHAjLYsp1ZSe7zFYHj7C6ul7TjeLQeZD_YwD66t62wDmpe_HlB-TnBA");
CkStringBuilder_Append(sbRsaJwk,"-njbglfIsRLtXlnDzQkv5dTltRJ11BKBBypeeF6689rjcJIDEz9RWdc\",");
CkStringBuilder_Append(sbRsaJwk,"\"dp\":\"BwKfV3Akq5_MFZDFZCnW-wzl-CCo83WoZvnLQwCTeDv8uzluRSnm71I3Q");
CkStringBuilder_Append(sbRsaJwk,"CLdhrqE2e9YkxvuxdBfpT_PI7Yz-FOKnu1R6HsJeDCjn12Sk3vmAktV2zb");
CkStringBuilder_Append(sbRsaJwk,"34MCdy7cpdTh_YVr7tss2u6vneTwrA86rZtu5Mbr1C1XsmvkxHQAdYo0\",");
CkStringBuilder_Append(sbRsaJwk,"\"dq\":\"h_96-mK1R_7glhsum81dZxjTnYynPbZpHziZjeeHcXYsXaaMwkOlODsWa");
CkStringBuilder_Append(sbRsaJwk,"7I9xXDoRwbKgB719rrmI2oKr6N3Do9U0ajaHF-NKJnwgjMd2w9cjz3_-ky");
CkStringBuilder_Append(sbRsaJwk,"NlxAr2v4IKhGNpmM5iIgOS1VZnOZ68m6_pbLBSp3nssTdlqvd0tIiTHU\",");
CkStringBuilder_Append(sbRsaJwk,"\"qi\":\"IYd7DHOhrWvxkwPQsRM2tOgrjbcrfvtQJipd-DlcxyVuuM9sQLdgjVk2o");
CkStringBuilder_Append(sbRsaJwk,"y26F0EmpScGLq2MowX7fhd_QJQ3ydy5cY7YIBi87w93IKLEdfnbJtoOPLU");
CkStringBuilder_Append(sbRsaJwk,"W0ITrJReOgo1cq9SbsxYawBgfp_gh6A5603k2-ZQwVK0JKSHuLFkuQ3U\"");
CkStringBuilder_Append(sbRsaJwk,"}");
rsaKey = CkPrivateKey_Create();
// 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 = CkPrivateKey_LoadJwk(rsaKey,CkStringBuilder_getAsString(sbRsaJwk));
if (success != TRUE) {
printf("%s\n",CkPrivateKey_lastErrorText(rsaKey));
CkStringBuilder_Dispose(sbRsaJwk);
CkPrivateKey_Dispose(rsaKey);
return;
}
// ---------------------------------------------------
// Use the following ECC key loaded from JWK format.
sbEccJwk = CkStringBuilder_Create();
CkStringBuilder_Append(sbEccJwk,"{\"kty\":\"EC\",");
CkStringBuilder_Append(sbEccJwk,"\"crv\":\"P-256\",");
CkStringBuilder_Append(sbEccJwk,"\"x\":\"f83OJ3D2xF1Bg8vub9tLe1gHMzV76e8Tus9uPHvRVEU\",");
CkStringBuilder_Append(sbEccJwk,"\"y\":\"x_FEzRu9m36HLN_tue659LNpXW6pCyStikYjKIWI5a0\",");
CkStringBuilder_Append(sbEccJwk,"\"d\":\"jpsQnnGQmL-YBIffH1136cspYG6-0iY7X1fCE9-E9LI\"");
CkStringBuilder_Append(sbEccJwk,"}");
eccKey = CkPrivateKey_Create();
// 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 = CkPrivateKey_LoadJwk(eccKey,CkStringBuilder_getAsString(sbEccJwk));
if (success != TRUE) {
printf("%s\n",CkPrivateKey_lastErrorText(eccKey));
CkStringBuilder_Dispose(sbRsaJwk);
CkPrivateKey_Dispose(rsaKey);
CkStringBuilder_Dispose(sbEccJwk);
CkPrivateKey_Dispose(eccKey);
return;
}
// ---------------------------------------------------
// The HMAC key (in base64url format)
hmacKey = "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow";
// ---------------------------------------------------
// Prepare the headers..
// RSASSA-PKCS1-v1_5 SHA-256
jwsProtHdr0 = CkJsonObject_Create();
CkJsonObject_AppendString(jwsProtHdr0,"alg","RS256");
jwsUnprotHdr0 = CkJsonObject_Create();
CkJsonObject_AppendString(jwsUnprotHdr0,"kid","myRsaKey");
// ECDSA using P-256 and SHA-256
jwsProtHdr1 = CkJsonObject_Create();
CkJsonObject_AppendString(jwsProtHdr1,"alg","ES256");
jwsUnprotHdr1 = CkJsonObject_Create();
CkJsonObject_AppendString(jwsUnprotHdr1,"kid","myEcKey");
// HMAC using SHA-256
jwsProtHdr2 = CkJsonObject_Create();
CkJsonObject_AppendString(jwsProtHdr2,"alg","HS256");
jwsUnprotHdr2 = CkJsonObject_Create();
CkJsonObject_AppendString(jwsUnprotHdr2,"kid","myMacKey");
// ---------------------------------------------------
// First set the JWS headers, keys, and payload, then we'll create the JWS...
jws = CkJws_Create();
CkJws_SetProtectedHeader(jws,0,jwsProtHdr0);
CkJws_SetUnprotectedHeader(jws,0,jwsUnprotHdr0);
CkJws_SetProtectedHeader(jws,1,jwsProtHdr1);
CkJws_SetUnprotectedHeader(jws,1,jwsUnprotHdr1);
CkJws_SetProtectedHeader(jws,2,jwsProtHdr2);
CkJws_SetUnprotectedHeader(jws,2,jwsUnprotHdr2);
CkJws_SetPrivateKey(jws,0,rsaKey);
CkJws_SetPrivateKey(jws,1,eccKey);
CkJws_SetMacKey(jws,2,hmacKey,"base64url");
bIncludeBom = FALSE;
payloadStr = "In our village, folks say God crumbles up the old moon into stars.";
CkJws_SetPayload(jws,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 = CkJws_createJws(jws);
if (CkJws_getLastMethodSuccess(jws) != TRUE) {
printf("%s\n",CkJws_lastErrorText(jws));
CkStringBuilder_Dispose(sbRsaJwk);
CkPrivateKey_Dispose(rsaKey);
CkStringBuilder_Dispose(sbEccJwk);
CkPrivateKey_Dispose(eccKey);
CkJsonObject_Dispose(jwsProtHdr0);
CkJsonObject_Dispose(jwsUnprotHdr0);
CkJsonObject_Dispose(jwsProtHdr1);
CkJsonObject_Dispose(jwsUnprotHdr1);
CkJsonObject_Dispose(jwsProtHdr2);
CkJsonObject_Dispose(jwsUnprotHdr2);
CkJws_Dispose(jws);
return;
}
// 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 = CkJsonObject_Create();
CkJsonObject_Load(json,jwsStr);
CkJsonObject_putEmitCompact(json,FALSE);
printf("%s\n",CkJsonObject_emit(json));
// 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"
// }
// ]
// }
CkStringBuilder_Dispose(sbRsaJwk);
CkPrivateKey_Dispose(rsaKey);
CkStringBuilder_Dispose(sbEccJwk);
CkPrivateKey_Dispose(eccKey);
CkJsonObject_Dispose(jwsProtHdr0);
CkJsonObject_Dispose(jwsUnprotHdr0);
CkJsonObject_Dispose(jwsProtHdr1);
CkJsonObject_Dispose(jwsUnprotHdr1);
CkJsonObject_Dispose(jwsProtHdr2);
CkJsonObject_Dispose(jwsUnprotHdr2);
CkJws_Dispose(jws);
CkJsonObject_Dispose(json);
}