// Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include <openssl/asn1.h>

#include <openssl/dsa.h>

#include <openssl/ec_key.h>

#include <openssl/err.h>

#include <openssl/evp.h>

#include <openssl/rsa.h>

int i2d_PrivateKey(const EVP_PKEY *a, uint8_t **pp) {

  switch (EVP_PKEY_id(a)) {

    case EVP_PKEY_RSA:

      return i2d_RSAPrivateKey(EVP_PKEY_get0_RSA(a), pp);

    case EVP_PKEY_EC:

      return i2d_ECPrivateKey(EVP_PKEY_get0_EC_KEY(a), pp);

    case EVP_PKEY_DSA:

      return i2d_DSAPrivateKey(EVP_PKEY_get0_DSA(a), pp);

    default:

      // Although this file is in crypto/x509 for layering reasons, it emits

      // an error code from ASN1 for OpenSSL compatibility.

      OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);

      return -1;

  }

}