我们正在使用小程序进行加密解密。我们发现数字证书存在一些意想不到的问题。一个系统有证书，我们无法从该证书中找到私钥，但通过安装相同的证书再次工作正常。
Java Plug-in 10.25.2.17
Using JRE version 1.7.0_25-b17 Java HotSpot(TM) 64-Bit Server VM
User home directory = C:\Users\admin
要访问私钥，我们使用以下代码。
private PrivateKey getPrivateKeyFromKeyStore(String pubkey, KeyStore browser) {
PrivateKey privateKey = null;
String pubKey1 = "";
if (browser != null) {
try {
Field spiField = KeyStore.class.getDeclaredField("keyStoreSpi");
spiField.setAccessible(true);
KeyStoreSpi spi = (KeyStoreSpi) spiField.get(browser);
Field entriesField = spi.getClass().getSuperclass().getDeclaredField("entries");
entriesField.setAccessible(true);
@SuppressWarnings("rawtypes")
Collection entries = (Collection) entriesField.get(spi);
for (Object entry : entries) {
String alias = (String) invokeGetter(entry, "getAlias");
X509Certificate[] certificateChain = (X509Certificate[]) invokeGetter(entry, "getCertificateChain");
for (X509Certificate current : certificateChain) {
pubKey1 = this.bASE64Encoder.encode(current.getPublicKey().getEncoded());
if (pubkey.equals(pubKey1) && !pubkey.equals("")) {
privateKey = (PrivateKey) invokeGetter(entry, "getPrivateKey");
return privateKey;
}
}
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
return privateKey;
}