使用从PEM文件生成的字符串在android上生成ECPrivateKey

Question

我正在尝试使用从PEM文件生成的字符串在android上生成ECPrivateKey，但出现错误：0D0680A8：asn1编码例程：ASN1_CHECK_TLEN：错误的标签错误。

我不想使用依赖关系（Bouncy Castle）来生成密钥。

我来自PEM的私钥

----- BEGIN EC私钥-----     MHcCAQEEID5vukktXVvQhHpJRyBz4ngksjChNPbqBs4BE + d / pOq9oAoGCCqGSM49     AwEHoUQDQgAEsUYsxpVlCmRQEFZn + A + aES3 / KtmvBUNDSEZyfcKZUTqT / qPzwLM /     g1O3X6YfNiDc5sIXxaQEahBpv0gjiWWnig == ----- END EC私钥-----

generatePrivateKeyfromPEM(){
    //Getting the private key from PEM
    String yPart = resultsPrivateKey.getData().substring(30, 198);
    //Sanitising the private key
    yPart = yPart.replaceAll("\n", "");
    yPart = yPart.replaceAll(" ","");

    ECPrivateKey sk;

    try {
        sk = getPrivateKey(yPart);
        Log.i(LOG_TAG, "Private key is" + sk.toString());
    } catch (InvalidKeySpecException e) {
        e.printStackTrace();
    }}

private ECPrivateKey getPrivateKey(String base64PrivateKey) throws InvalidKeySpecException {
    byte[] fromPEM = org.apache.commons.codec.binary.Base64.decodeBase64(base64PrivateKey.getBytes());

    PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(fromPEM);
    KeyFactory factory = null;
    try {
        factory = KeyFactory.getInstance("EC");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    PrivateKey privateKey = factory.generatePrivate(spec);
    return (ECPrivateKey) privateKey;

}