在java中解析装甲ECC公钥/私钥(由gpg cli生成)

我正在尝试将装甲的ECC gpg密钥转换为相应的 java类
ECPrivateKey / ECPublicKey.

要生成我正在使用的密钥对：gpg –expert –full-generate-key

然后选择(9)ECC和ECC(或(10)ECC(仅签名))

然后选择(3)NIST P-256

导致：

-----BEGIN PGP PUBLIC KEY BLOCK-----

mFIEWUdzwhMIKoZIzj0DAQcCAwQkAvZC1PIJ8ke1myyKhNny9vN78TIYo2MuAOY+
F38L9S3+Za9cKV/iIHOqfapbMoqdSmSnqDkevwQSr5MF2UOXtCJzaWduZWNjIChF
Q0Mgc2lnbiBvbmx5KSA8c3NAc3MuY28+iJAEExMIADgWIQRiC+kefVkjnjKovKy5
XANFl5+n1gUCWUdzwgIbAwULCQgHAgYVCAkKCwIEFgIDAQIeAQIXgAAKCRC5XANF
l5+n1mzGAQDsgutymxDTTXPKFfpFFVp4fxacx1MSqxP71gNJYjguXwD8CEXD20Vm
aU1WMi2jU7JC6oJn94Y4vWHwTLOU1zmQ19o=
=swfS
-----END PGP PUBLIC KEY BLOCK-----

-----BEGIN PGP PRIVATE KEY BLOCK-----

lHcEWUdzwhMIKoZIzj0DAQcCAwQkAvZC1PIJ8ke1myyKhNny9vN78TIYo2MuAOY+
F38L9S3+Za9cKV/iIHOqfapbMoqdSmSnqDkevwQSr5MF2UOXAAD9FhS2HZoWOyIi
l9nj+WPa9S1o50jM5bNIRALzcyS8SgoP97Qic2lnbmVjYyAoRUNDIHNpZ24gb25s
eSkgPHNzQHNzLmNvPoiQBBMTCAA4FiEEYgvpHn1ZI54yqLysuVwDRZefp9YFAllH
c8ICGwMFCwkIBwIGFQgJCgsCBBYCAwECHgECF4AACgkQuVwDRZefp9ZsxgEA7ILr
cpsQ001zyhX6RRVaeH8WnMdTEqsT+9YDSWI4Ll8A/AhFw9tFZmlNVjIto1OyQuqC
Z/eGOL1h8EyzlNc5kNfa
=qHBB
-----END PGP PRIVATE KEY BLOCK-----

如何从这种装甲文本格式获得有效的java.security.interfaces.ECPrivateKey和java.security.interfaces.ECPublicKey java类？

我的最终目标是以下列方式签名：

String createSignatureFromJson(String jsonPayload,byte[] privateKey) {
        Payload payload = new Payload(jsonPayload)
        def key = privateKeyParse(privateKey)

        JWSSigner signer = new ECDSASigner((ECPrivateKey)key)
        JWSHeader header = new JWSHeader.Builder(JWSAlgorithm.ES256).build()

        JWSObject jwsObject = new JWSObject(header,payload)
        jwsObject.sign(signer)
        jwsObject.signature
    }

解决方法

如果您只是传递’私钥块’,这将提取ECPrivateKey：

private static ECPrivateKey privateKeyParse(byte[] privateKey) throws Exception
{
    InputStream pgpIn = PGPUtil.getDecoderStream(new ByteArrayInputStream(privateKey));

    PGPObjectFactory pgpFact = new PGPObjectFactory(pgpIn,new JcaKeyFingerprintCalculator());
    PGPSecretKeyRing pgpSecRing = (PGPSecretKeyRing)pgpFact.nextObject();
    PGPSecretKey pgpSec = pgpSecRing.getSecretKey();
    PGPPrivateKey pgpPriv = pgpSec.extractPrivateKey(null);

    return (ECPrivateKey)new JcaPGPKeyConverter().getPrivateKey(pgpPriv);
}

要回答关于如何获得’privateKey’的评论问题,如果整个：

-----BEGIN PGP PRIVATE KEY BLOCK-----
...
-----END PGP PRIVATE KEY BLOCK-----

在一个文件中,然后只需将整个文件读入一个byte []：

InputStream fIn = new BufferedInputStream(new FileInputStream(...));
byte[] privateKey = org.bouncycastle.util.io.Streams.readAll(fIn);