[How to Solve] UnrecoverableKeyException: Cannot recover key

(1) Java code gets the private key through keystore file and reports an error

When using keytool to generate keystore file and then obtain private key through Java, an error is reported

java.security.UnrecoverableKeyException: Cannot recover key
	at sun.security.provider.KeyProtector.recover(KeyProtector.java:311)
	at sun.security.provider.JavaKeyStore.engineGetKey(JavaKeyStore.java:121)
	at sun.security.provider.JavaKeyStore$JKS.engineGetKey(JavaKeyStore.java:38)
	at java.security.KeyStore.getKey(KeyStore.java:763)
	at com.jn.test.TestCA.test_01(TestCA.java:18)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)

The specific operation is as follows

Using keystone to generate local digital certificate

keytool -genkeypair -keyalg RSA -keysize 2048 -sigalg SHA1withRSA -validity 36000 -alias localhost -storepass abcdefg -keystore zlex.keystore -dname "CN=localhost, OU=zlex,O=zlex, L=BJ, ST=BJ, C=CN"

Results of operation:

Note: the password of keystore is ABCDEFG, which is specified by – storepass

The Java code is as follows:


	public void test_01() throws Exception {
		String keyStorePath="d:\\Temp\\a\\a\\ca\\zlex.keystore";
		String password="abcdefg";
		// Get the key store
		KeyStore ks = getKeyStore(keyStorePath, password);
		// Get the private key
		PrivateKey privateKey = (PrivateKey) ks.getKey("localhost", password.toCharArray());

	 * Get KeyStore
	 * @param keyStorePath
	 * KeyStorePath
	 * @param password
	 * password
	 * @return KeyStore keystore
	private static KeyStore getKeyStore(String keyStorePath, String password)
			throws Exception {
		// Instantiate the keystore
		KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
		// Get the keystore file stream
		FileInputStream is = new FileInputStream(keyStorePath);
		// load the keystore
		ks.load(is, password.toCharArray());
		// Close the keystore file stream
		return ks;

When running the above java code, an error is reported: java. Security. Unrecoverable keyexception: cannot recover key 0

What is the reason

Reason: the keystore password is different from the master password

Solution: keystore password and master password use the same password

Please refer to: http://stackoverflow.com/questions/4926290/java-keystore-and-password-settings

(2) Tomcat uses keystore file to start error reporting

If the keystore password is different from the master password, an error will be reported when starting Tomcat

Command: keytool – genkey – alias Tomcat – keyalg RSA – keysize 1024 – validity 365 – keystoretomcat22.keystore

The generated file is tomcat22.keystore

Password 1 and password 2 must be the same, otherwise, an error will be reported when starting Tomcat

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