java.security.NoSuchAlgorithmException：没有这样的算法：提供商BC的ECDH

Question

虽然我已经下载了无限的JCE策略并且已经添加了lib bcprov，但我在Android中有这个例外。此外，我添加了该行：

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请帮助我了解缺少的内容。我阅读其他帖子，发现他们已经完成了上述内容。该应用程序崩溃的loadprivatekey，在该行：

ECParameterSpec params = ECNamedCurveTable.getParameterSpec(CurveName);) 

其从doECDH函数调用

public static PrivateKey loadPrivateKey (byte [] data) throws Exception 
    { 
    Security.addProvider(new BouncyCastleProvider()); 
    ECParameterSpec params = ECNamedCurveTable.getParameterSpec(CurveName); 
    ECPrivateKeySpec prvkey = new ECPrivateKeySpec(new BigInteger(data), 
    params); 
    KeyFactory kf = KeyFactory.getInstance("ECDH", "BC"); 
    return kf.generatePrivate(prvkey); 
} 

public static String doECDH (String data_Prv, String data_Pub) throws Exception 
{ 
    byte[] dataPrv = hexToBytes(data_Prv); 
    byte[] dataPub = hexToBytes(data_Pub); 
    KeyAgreement ka = KeyAgreement.getInstance("ECDH", "BC"); 
    ka.init(loadPrivateKey(dataPrv)); 
    ka.doPhase(loadPublicKey(dataPub), true); 
    byte [] secret = ka.generateSecret(); 
    Shared_Key = bytesToHex(secret); 
    //SecretKey originalKey = new SecretKeySpec(secret, 0, secret.length, "ECDH"); 
    return Shared_Key; 
} 

Answer 1

尝试使用spongycastle，添加到您的build.gradle：

compile 'com.madgag.spongycastle:core:1.54.0.0' 
compile 'com.madgag.spongycastle:prov:1.54.0.0' 
compile 'com.madgag.spongycastle:pkix:1.54.0.0' 
compile 'com.madgag.spongycastle:pg:1.54.0.0' 

加入了这段代码：

static { 
    Security.insertProviderAt(new org.spongycastle.jce.provider.BouncyCastleProvider(), 1); 
} 

，并使用此：

KeyFactory kf = KeyFactory.getInstance("ECDH", "SC"); 

这：

KeyAgreement ka = KeyAgreement.getInstance("ECDH", "SC");