(C) Change Password for Java KeyStore File

Demonstrates how to load a Java keystore, change the password, and save using the new password. If the Java keystore contains only trusted root certificates, then it's simply a matter of loading the JKS with the existing password, and then saving with a new password. If the JKS contains private key entries, then each private key entry must be re-keyed using the new password by calling the ChangePassword method.

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#include <C_CkJavaKeyStore.h>

void ChilkatSample(void)
    {
    HCkJavaKeyStore jks;
    const char *oldJksPassword;
    const char *newJksPassword;
    const char *jksPath;
    BOOL success;
    int numPrivateKeys;
    int i;

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

    jks = CkJavaKeyStore_Create();

    oldJksPassword = "existingPassword";
    newJksPassword = "newPassword";
    jksPath = "/someDir/keyStore.jks";

    // Load the Java keystore from a file.
    success = CkJavaKeyStore_LoadFile(jks,oldJksPassword,jksPath);
    if (success != TRUE) {
        printf("%s\n",CkJavaKeyStore_lastErrorText(jks));
        CkJavaKeyStore_Dispose(jks);
        return;
    }

    // If the JKS contains private key entries, then each
    // must be re-keyed with the new password by calling ChangePassword.
    numPrivateKeys = CkJavaKeyStore_getNumPrivateKeys(jks);

    i = 0;
    while (i < numPrivateKeys) {

        success = CkJavaKeyStore_ChangePassword(jks,i,oldJksPassword,newJksPassword);
        if (success != TRUE) {
            printf("%s\n",CkJavaKeyStore_lastErrorText(jks));
            CkJavaKeyStore_Dispose(jks);
            return;
        }

        i = i + 1;
    }

    // Write the JKS using the new password for the JKS file's keyed digest.
    success = CkJavaKeyStore_ToFile(jks,newJksPassword,jksPath);
    if (success != TRUE) {
        printf("%s\n",CkJavaKeyStore_lastErrorText(jks));
        CkJavaKeyStore_Dispose(jks);
        return;
    }

    printf("Updated the password for the Java keystore file.\n");


    CkJavaKeyStore_Dispose(jks);

    }