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(Unicode C) Create JWS using the Flattened JSON Serialization FormatCreates a JSON Web Signature (JWS) containing 1 signature and output using the flattened JSON serialization format. Note: This example requires Chilkat v9.5.0.66 or greater.
#include <C_CkStringBuilderW.h> #include <C_CkPrivateKeyW.h> #include <C_CkJsonObjectW.h> #include <C_CkJwsW.h> void ChilkatSample(void) { HCkStringBuilderW sbEccJwk; HCkPrivateKeyW eccKey; BOOL success; HCkJsonObjectW jwsProtHdr; HCkJsonObjectW jwsUnprotHdr; HCkJwsW jws; BOOL bIncludeBom; const wchar_t *payloadStr; const wchar_t *jwsStr; HCkJsonObjectW json; // 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 one signature using an ECDSA key. sbEccJwk = CkStringBuilderW_Create(); CkStringBuilderW_Append(sbEccJwk,L"{\"kty\":\"EC\","); CkStringBuilderW_Append(sbEccJwk,L"\"crv\":\"P-256\","); CkStringBuilderW_Append(sbEccJwk,L"\"x\":\"f83OJ3D2xF1Bg8vub9tLe1gHMzV76e8Tus9uPHvRVEU\","); CkStringBuilderW_Append(sbEccJwk,L"\"y\":\"x_FEzRu9m36HLN_tue659LNpXW6pCyStikYjKIWI5a0\","); CkStringBuilderW_Append(sbEccJwk,L"\"d\":\"jpsQnnGQmL-YBIffH1136cspYG6-0iY7X1fCE9-E9LI\""); CkStringBuilderW_Append(sbEccJwk,L"}"); eccKey = CkPrivateKeyW_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 = CkPrivateKeyW_LoadJwk(eccKey,CkStringBuilderW_getAsString(sbEccJwk)); if (success != TRUE) { wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(eccKey)); CkStringBuilderW_Dispose(sbEccJwk); CkPrivateKeyW_Dispose(eccKey); return; } // --------------------------------------------------- // Prepare both a protected and unprotected header. jwsProtHdr = CkJsonObjectW_Create(); CkJsonObjectW_AppendString(jwsProtHdr,L"alg",L"ES256"); jwsUnprotHdr = CkJsonObjectW_Create(); CkJsonObjectW_AppendString(jwsUnprotHdr,L"kid",L"myEcKey"); // --------------------------------------------------- jws = CkJwsW_Create(); CkJwsW_SetProtectedHeader(jws,0,jwsProtHdr); CkJwsW_SetUnprotectedHeader(jws,0,jwsUnprotHdr); CkJwsW_SetPrivateKey(jws,0,eccKey); bIncludeBom = FALSE; payloadStr = L"In our village, folks say God crumbles up the old moon into stars."; CkJwsW_SetPayload(jws,payloadStr,L"utf-8",bIncludeBom); // --------------------------------------------------- // Create the JWS. // Indicate we prefer the non-compact, flattened serialization. CkJwsW_putPreferCompact(jws,FALSE); CkJwsW_putPreferFlattened(jws,TRUE); jwsStr = CkJwsW_createJws(jws); if (CkJwsW_getLastMethodSuccess(jws) != TRUE) { wprintf(L"%s\n",CkJwsW_lastErrorText(jws)); CkStringBuilderW_Dispose(sbEccJwk); CkPrivateKeyW_Dispose(eccKey); CkJsonObjectW_Dispose(jwsProtHdr); CkJsonObjectW_Dispose(jwsUnprotHdr); CkJwsW_Dispose(jws); return; } // The jwsStr is contains the flattened 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 = CkJsonObjectW_Create(); CkJsonObjectW_Load(json,jwsStr); CkJsonObjectW_putEmitCompact(json,FALSE); wprintf(L"%s\n",CkJsonObjectW_emit(json)); // Sample output: // { // "payload": "SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu", // "protected": "eyJhbGciOiJFUzI1NiJ9", // "header": { // "kid": "myEcKey" // }, // "signature": "b7V2UpDPytr-kMnM_YjiQ3E0J2ucOI9LYA7mt57vccrK1rb84j9areqgQcJwOA00aWGoz4hf6sMTBfobdcJEGg" // } CkStringBuilderW_Dispose(sbEccJwk); CkPrivateKeyW_Dispose(eccKey); CkJsonObjectW_Dispose(jwsProtHdr); CkJsonObjectW_Dispose(jwsUnprotHdr); CkJwsW_Dispose(jws); CkJsonObjectW_Dispose(json); } |
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