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!7

!include once #1030462 // BouncyCastle

concept Entry {
  S publicKey;
  SecretValue<S> privateKey;
  S comment;
  S globalID = aGlobalID();
}

cmodule2 WebPushKeyManager > DynCRUD<PasswordEntry> {
  KeyPair generateKeyPair() ctex {
    ECNamedCurveParameterSpec parameterSpec = ECNamedCurveTable.getParameterSpec(nl.martijndwars.webpush.Utils.CURVE);

    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(nl.martijndwars.webpush.Utils.ALGORITHM,
      org.bouncycastle.jce.provider.BouncyCastleProvider.PROVIDER_NAME);
    keyPairGenerator.initialize(parameterSpec);

    ret keyPairGenerator.generateKeyPair();
  }
  
  // API
  
  PKIKeyPair getKeyPair() {
    lock dbLock();
    
    Entry entry = conceptWhere Entry();
    if (entry == null) {
      KeyPair keyPair = generateKeyPair();
      ECPublicKey publicKey = cast keyPair.getPublic();
      ECPrivateKey privateKey = cast keyPair.getPrivate();

      byte[] encodedPublicKey = nl.martijndwars.webpush.Utils.encode(publicKey);
      byte[] encodedPrivateKey = nl.martijndwars.webpush.Utils.encode(privateKey);
    
      S publicKeyString = base64encode(encodedPublicKey);
      S privateKeyString = base64encode(encodedPrivateKey);   
      
      Entry entry = cnew Entry(publicKey := publicKeyString,
        privateKey := SecretValue(privateKeyString));
    }
    
    ret entry;
  }
  
  
}