如何找回存储在JCEKS密钥库中的密码？

Question

我已经使用java的keytool创建了一个密钥库，使用以下命令来存储passowrd

$ keytool -importpassword -alias myalias -keystore mykeystore.jceks -storetype jceks 
Enter keystore password:  keystore
Re-enter new password: keystore
Enter the password to be stored: testpassword 
Re-enter password: testpassword
Enter key password for <myalias>
    (RETURN if same as keystore password): 

我想在Java程序中检索此密码。这是我到目前为止所写的内容。

InputStream is = new FileInputStream(new File("mykeystore.jceks"));
KeyStore ks = KeyStore.getInstance("jceks");
ks.load(is, "keystore".toCharArray());
PasswordProtection pp = new PasswordProtection("keystore".toCharArray());
SecretKeyEntry ske = (SecretKeyEntry) ks.getEntry("myalias", pp);
System.out.println(ske.toString()); // Outputs: "Secret key entry with algorithm PBEWithMD5AndDES"

如何找回存储的密码？可能吗？

下面完整的参考代码。

所需的库：

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import java.security.Key;
import java.security.KeyStore;
import java.security.KeyStore.PasswordProtection;
import java.security.KeyStore.SecretKeyEntry;

import java.security.cert.CertificateException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.UnrecoverableEntryException;

Class：

class JCEKS 
{  
    public static void main(String args[]) 
    {
        try{
            InputStream is = new FileInputStream(new File("mykeystore.jceks"));
            KeyStore ks = KeyStore.getInstance("jceks");
            ks.load(is, "keystore".toCharArray());
            PasswordProtection pp = new PasswordProtection("keystore".toCharArray());
            SecretKeyEntry ske = (SecretKeyEntry) ks.getEntry("myalias", pp);

            System.out.println(ske.toString());
        }
        catch(KeyStoreException e){
            System.out.println("KeyStoreException:");
            System.out.println(e);
        }
        catch(FileNotFoundException e){
            System.out.println("FileNotFoundException:");
            System.out.println(e.getMessage());
        }
        catch(IOException e){
            System.out.println("IOException:");
            System.out.println(e.getMessage());
        }
        catch(NoSuchAlgorithmException e){
            System.out.println("NoSuchAlgorithmException:");
            System.out.println(e.getMessage());
        }
        catch(CertificateException e){
            System.out.println("CertificateException:");
            System.out.println(e.getMessage());
        }
        catch(UnrecoverableKeyException e){
            System.out.println("UnrecoverableKeyException:");
            System.out.println(e.getMessage());
        }
        catch(UnrecoverableEntryException e){
            System.out.println("UnrecoverableEntryException:");
            System.out.println(e.getMessage());
        }
    } 
} 

Answer 1

您存储的password条目存储为SecretKeyEntry，可以使用getEncoded()对象的secretKey方法检索其值。

System.out.println（新字符串（ske.getSecretKey（）。getEncoded（）））；

Answer 2

经过一些挖掘和反复试验后，您可以检索使用keytool存储的密码例如，如果您使用以下命令来存储密码

    > $ keytool -importpassword -alias my-alias -keystore my-keystore.jcek -storetype jceks

    > Enter keystore password:  keystorepassword 
    > Re-enter new password:keystorepassword 
    > Enter the password to be stored: thepassword
    > Re-enter password: thepassword 
    > Enter key password for <my-alias>
        (RETURN if same as keystore password): keypassword 
    > Re-enter new password: keypassword

要检索您存储的密码（即'thepassword'）：

InputStream is = new FileInputStream(new File("my-keystore.jceks"));
KeyStore ks = KeyStore.getInstance("JCEKS");
ks.load(is, "keystorepassword".toCharArray());
PasswordProtection pp = new PasswordProtection("keypassword".toCharArray());
SecretKeyEntry ske = (SecretKeyEntry) ks.getEntry("my-alias", pp);
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBEWITHMD5ANDDES");
PBEKeySpec keySpec = (PBEKeySpec) factory.getKeySpec(ske.getSecretKey(), PBEKeySpec.class);
String password = new String(keySpec.getPassword());
System.out.println(password);

输出：密码

请注意，当您存储字符串时，它默认为PBEWITHMD5ANDDES算法。因此，您需要下载javax-crypto.jar并将其与程序javac -cp javax-crypto.jar your-program.java

一起编译