(C) Create JCEKS Containing Secret Keys

Demonstrates how to create a JCEKS keystore file containing symmetric secret keys (for AES, Blowfish, HMAC SHA25, ChaCha20, etc.)

This example requires Chilkat v9.5.0.66 or greater.

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#include <C_CkJavaKeyStore.h>
#include <C_CkPrng.h>
#include <C_CkStringBuilder.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkJavaKeyStore jceks;
    HCkPrng prng;
    const char *aesKey;
    const char *blowfishKey;
    const char *hmacKey;
    const char *chachaKey;
    const char *encoding;
    const char *password;
    const char *filePassword;
    BOOL success;
    HCkStringBuilder sbJson;
    HCkJsonObject json;

    // IMPORTANT: This example requires Chilkat v9.5.0.66 or greater.

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    jceks = CkJavaKeyStore_Create();

    // We'll need a pseudo-random number generator (PRNG) to generate symmetric keys.
    prng = CkPrng_Create();

    // Generate some keys..

    // 128-bit AES key (16 bytes)
    aesKey = CkPrng_genRandom(prng,16,"base64");

    // 256-bit Blowfish key (32 bytes)
    blowfishKey = CkPrng_genRandom(prng,32,"base64");

    // HMAC SHA256 key
    // (An HMAC key can be anything, and any length. We'll use the following string:
    hmacKey = "This is my HMAC key";

    // ChaCha20 256-bit
    chachaKey = CkPrng_genRandom(prng,32,"base64");

    // Add each secret key to the JCEKS
    encoding = "base64";
    password = "secret";
    CkJavaKeyStore_AddSecretKey(jceks,aesKey,encoding,"AES","my aes key",password);
    CkJavaKeyStore_AddSecretKey(jceks,blowfishKey,encoding,"BLOWFISH","my blowfish key",password);
    // For HMAC, we're using the us-ascii bytes for the key..
    CkJavaKeyStore_AddSecretKey(jceks,hmacKey,"ascii","HMAC_SHA256","my hmac key",password);
    CkJavaKeyStore_AddSecretKey(jceks,chachaKey,encoding,"CHACHA","my chacha20 key",password);

    filePassword = "password";
    // Write the JCEKs to a file.
    success = CkJavaKeyStore_ToFile(jceks,filePassword,"qa_output/secretKeys.jceks");
    if (success != TRUE) {
        printf("%s\n",CkJavaKeyStore_lastErrorText(jceks));
        CkJavaKeyStore_Dispose(jceks);
        CkPrng_Dispose(prng);
        return;
    }

    // We can also emit as a JWK Set..
    sbJson = CkStringBuilder_Create();
    success = CkJavaKeyStore_ToJwkSet(jceks,"secret",sbJson);
    if (success != TRUE) {
        printf("%s\n",CkJavaKeyStore_lastErrorText(jceks));
        CkJavaKeyStore_Dispose(jceks);
        CkPrng_Dispose(prng);
        CkStringBuilder_Dispose(sbJson);
        return;
    }

    // Emit the JSON in pretty-printed (indented) form:
    json = CkJsonObject_Create();
    CkJsonObject_LoadSb(json,sbJson);
    CkJsonObject_putEmitCompact(json,FALSE);
    printf("%s\n",CkJsonObject_emit(json));

    // Output is:

    // { 
    //   "keys": [
    //     { 
    //       "kty": "oct",
    //       "alg": "AES",
    //       "k": "vHekQQB0Gc1NvppapUTW2g",
    //       "kid": "my aes key"
    //     },
    //     { 
    //       "kty": "oct",
    //       "alg": "BLOWFISH",
    //       "k": "qHsdXaJsXicVCZbK8l8hJQpYOa0GkiO9gsRK9WLtht8",
    //       "kid": "my blowfish key"
    //     },
    //     { 
    //       "kty": "oct",
    //       "alg": "HMAC_SHA256",
    //       "k": "VGhpcyBpcyBteSBITUFDIGtleQ",
    //       "kid": "my hmac key"
    //     },
    //     { 
    //       "kty": "oct",
    //       "alg": "CHACHA",
    //       "k": "yNv832U43C9BcWvaQAH2_rG-GwfmpgT5JBRllWGQY1o",
    //       "kid": "my chacha20 key"
    //     }
    //   ]
    // }
    // 


    CkJavaKeyStore_Dispose(jceks);
    CkPrng_Dispose(prng);
    CkStringBuilder_Dispose(sbJson);
    CkJsonObject_Dispose(json);

    }