未找到签名SHA256WITHECDSA实现

Question

我正在开发一个项目，创建一个PKI来获取Android中的证书请求。

现在我正在使用Spongycastle，它在Android 5及以上版本中运行，但是在4.X上它显示了这个：

Signature SHA256WITHECDSA implementation not found
 java.security.NoSuchAlgorithmException: Signature SHA256WITHECDSA implementation not found
     at org.apache.harmony.security.fortress.Engine.notFound(Engine.java:177)
     at org.apache.harmony.security.fortress.Engine.getInstance(Engine.java:170)
     at java.security.Signature.getSignatureInstance(Signature.java:178)
     at java.security.Signature.getInstance(Signature.java:146)
     at org.spongycastle.jce.PKCS10CertificationRequest.<init>(PKCS10CertificationRequest.java:363)
     at org.spongycastle.jce.PKCS10CertificationRequest.<init>(PKCS10CertificationRequest.java:248)
     at com.unipagos.app.enrollmentprocess.EnrollmentStep5FragmentActivity.createPKI(EnrollmentStep5FragmentActivity.java:199)
     at com.unipagos.app.enrollmentprocess.EnrollmentStep5FragmentActivity.onPostCreate(EnrollmentStep5FragmentActivity.java:145)
     at android.app.Instrumentation.callActivityOnPostCreate(Instrumentation.java:1157)
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2075)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2117)
     at android.app.ActivityThread.access$700(ActivityThread.java:134)
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1218)
     at android.os.Handler.dispatchMessage(Handler.java:99)
     at android.os.Looper.loop(Looper.java:137)
     at android.app.ActivityThread.main(ActivityThread.java:4867)
     at java.lang.reflect.Method.invokeNative(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:511)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
     at dalvik.system.NativeStart.main(Native Method)

创建证书请求的代码如下：

public String createPKI(String mdnString) {
    try {

        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC");
        //KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("ECDSA", "SC");

        ECGenParameterSpec ecGenSpec = new ECGenParameterSpec("prime256v1");
        keyPairGenerator.initialize(ecGenSpec, new SecureRandom());

        KeyPair kp =  keyPairGenerator.generateKeyPair();

        publicKey = kp.getPublic();
        privateKey = kp.getPrivate();

        PKCS10CertificationRequest kpGen = new PKCS10CertificationRequest("SHA256WITHECDSA", new X509Name(String.format("UID=%s", mdnString)), publicKey, null, privateKey);

        String certRequest = Base64.encodeToString(kpGen.getEncoded(), Base64.DEFAULT);
        certRequest = certRequest.replace("\n", "");

        return certRequest;

    } catch(Exception e) {
        if (Constants.DEBUG) {
            Log.v("Exception", e.getMessage());
        }
        e.printStackTrace();
        return null;
    }
}

我正在使用的spongycastle版本是这样的：sc-light-jdk15on-1.47.0.2.jar和scprov-jdk15on-1.47.0.2.jar

¿有关于此的任何想法？

Answer 1

你添加了SpongyCastle提供商吗？

static {Security.addProvider（new org.spongycastle.jce.provider.BouncyCastleProvider（））;）}

此外，您将不得不使用此KeyPairGenerator实例：

KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance（“EC”，“SC”）;

确保您选择SpongyCastle作为安全提供程序。