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本文介紹了InvalidKeySpecException:algid 解析錯誤，不是序列的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！

問題描述

我正在編寫一個程序，它接受來自控制臺的輸入 - zip 文件的名稱、要制作的 zip 文件的名稱，其中包含從第一個 zip 生成的(de/en)加密文件和一個包含公鑰.解密時出現異常:

線程main"中的異常 java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException : algid parse error, not a sequence在 sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:217)在 java.security.KeyFactory.generatePrivate(KeyFactory.java:372)在 com.Main.makePrivateKey(Main.java:148)在 com.Main.decrypt(Main.java:40)在 com.Main.main(Main.java:182)引起:java.security.InvalidKeyException:IOException:algid解析錯誤，不是序列在 sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:351)在 sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:356)在 sun.security.rsa.RSAPrivateCrtKeyImpl.<init>(RSAPrivateCrtKeyImpl.java:91)在 sun.security.rsa.RSAPrivateCrtKeyImpl.newKey(RSAPrivateCrtKeyImpl.java:75)在 sun.security.rsa.RSAKeyFactory.generatePrivate(RSAKeyFactory.java:316)在 sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:213)... 4 更多

不知道為什么，因為我在 makePrivateKey 方法中使用了正確的規范.我正在測試的鍵是(一個單獨的文件中的一個鍵的一行):

公鑰:

<預> <代碼> MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCE3pA746UfpC8sFk8ZJp0yupyJqj5jy6cjdxUYoP7mCm7c0mqQDeCcDNBYW2eSozCioPrH/9L + CDQEPLYakoem + jFnUKDH5 + PRU/0PJTJJF8Xh/ZT9eJlvsYBr1/qSfICf6RTs7kzwq9IuSZBw7/tfNEF9i0A8FVox6HOopXod1QIDAQAB

私鑰:

 <代碼> MIICXQIBAAKBgQCE3pA746UfpC8sFk8ZJp0yupyJqj5jy6cjdxUYoP7mCm7c0mqQDeCcDNBYW2eSozCioPrH/9L + CDQEPLYakoem + jFnUKDH5 + PRU/0PJTJJF8Xh/ZT9eJlvsYBr1/qSfICf6RTs7kzwq9IuSZBw7/tfNEF9i0A8FVox6HOopXod1QIDAQABAoGANOFrYBqK5lvu1koOswDWQZFZqcSSzh8IZyoGwGWa7S0r0EECXlDXmuPSq8e9IfRG8ALHrH + ZlrbnFOSgyVSWHfpj3aH + qknoSX5TW2rMQHih8865xuqheMQ + RTZ7 + BRDqNsYkzxB/Z8mqzpoJQSYf + H7nWxdDCgAJVYZzxl3DmUCQQD32iEjnwiwUjii8slcmvCEZl + z84DWNdvJOg6Z38sI4AvrfpKc1WAcDg1rNZCKrRgokh54wpLt08cpFcrD04c3AkEAiTzDmc0bdgfg5wj6xHFZpYlBwiGm/bjOR2PS57P0GNU5PsDllRbFqIuzArITutO5lvZZImzuYz7Lf + cQ73pxUwJBAOdEwmdaneDo17A0m2 + TO3/nhqWDMVSwLMU3RyiNigZeCMFU + bkd4PBMrHi9IoJDwacZsRU9eZwxYEUV8H2Jg0ECQEEkOqRSm2pXKwX/WSjNtQPCNxhy6NUeV6vDUmTxIjh3XYjP/ynZeVEbnoj1BjB0N2/U11Jj6nPpZqb7gyppMEkCQQCoGdVYDipU+hMMnvxa0zOIyQc/a+HE0lESqn+2ZPafYi9Z1RldRMvUXhP8U7s+OuhRwprdw2ivvOFrnWyz9lL2

該程序的代碼如下.歡迎任何幫助:)

包com;導入 java.io.BufferedReader；導入java.io.File；導入 java.io.FileInputStream；導入 java.io.FileOutputStream；導入 java.io.FileReader；導入 java.io.IOException；導入 java.io.InputStream；導入 java.io.OutputStream；導入 java.security.GeneralSecurityException；導入 java.security.KeyFactory；導入 java.security.PrivateKey；導入 java.security.PublicKey；導入 java.security.Security；導入 java.security.spec.PKCS8EncodedKeySpec；導入 java.security.spec.X509EncodedKeySpec；導入 java.util.Base64；導入 java.util.Enumeration；導入 java.util.Scanner；導入 java.util.zip.ZipEntry；導入 java.util.zip.ZipFile；導入 java.util.zip.ZipOutputStream；導入 javax.crypto.Cipher；公共類主要{公共最終靜態 int BUFFER_SIZE = 117;公共靜態無效解密(字符串 originalZipFileName，字符串 newZipFileName，字符串 privateKeyFileName)拋出異常 {字節[] 緩沖區 = 新字節[BUFFER_SIZE];ZipFile originalZipFile = new ZipFile(originalZipFileName);ZipOutputStream newZipFile = new ZipOutputStream(new FileOutputStream(newZipFileName));枚舉zipEntries = originalZipFile.entries();字符串 privateKey = getKeyString(privateKeyFileName);PrivateKey key = makePrivateKey(privateKey);密碼密碼 = Cipher.getInstance("RSA");cipher.init(Cipher.DECRYPT_MODE, key);文件 file = new File("temp.txt");而(zipEntries.hasMoreElements()){ZipEntry 條目 = zipEntries.nextElement();ZipEntry 副本 = 新 ZipEntry(entry.getName());newZipFile.putNextEntry(復制);整數讀取；InputStream inputEntry = originalZipFile.getInputStream(entry);OutputStream outputFile = new FileOutputStream(file);而((讀取= inputEntry.read(緩沖區))！= -1){outputFile.write(cipher.doFinal(buffer), 0, read);}InputStream inputTempFile = new FileInputStream(file);而((讀取= inputTempFile.read(緩沖區))！= -1){newZipFile.write(緩沖區，0，讀取)；}newZipFile.closeEntry();inputEntry.close();inputTempFile.close();輸出文件.close();文件.刪除()；}newZipFile.close();}公共靜態無效加密(字符串 originalZipFileName，字符串 newZipFileName，字符串 publicKeyFileName)拋出異常 {字節[] 緩沖區 = 新字節[BUFFER_SIZE];ZipFile originalZipFile = new ZipFile(originalZipFileName);ZipOutputStream newZipFile = new ZipOutputStream(new FileOutputStream(newZipFileName));枚舉zipEntries = originalZipFile.entries();字符串 publicKey = getKeyString(publicKeyFileName);PublicKey 密鑰 = makePublicKey(publicKey);密碼密碼 = Cipher.getInstance("RSA");cipher.init(Cipher.ENCRYPT_MODE，密鑰)；文件 file = new File("temp.txt");而(zipEntries.hasMoreElements()){ZipEntry 條目 = zipEntries.nextElement();ZipEntry 副本 = 新 ZipEntry(entry.getName());newZipFile.putNextEntry(復制);整數讀取；InputStream inputEntry = originalZipFile.getInputStream(entry);OutputStream outputFile = new FileOutputStream(file);而((讀取= inputEntry.read(緩沖區))！= -1){outputFile.write(cipher.doFinal(buffer), 0, read);}InputStream inputTempFile = new FileInputStream(file);而((讀取= inputTempFile.read(緩沖區))！= -1){newZipFile.write(緩沖區，0，讀取)；}newZipFile.closeEntry();inputEntry.close();inputTempFile.close();輸出文件.close();文件.刪除()；}newZipFile.close();}公共靜態字符串 getKeyString(字符串文件名){字符串鍵 = 新字符串()；嘗試 {BufferedReader buf = new BufferedReader(new FileReader(fileName));鍵 = buf.readLine();} 捕捉(IOException e){e.printStackTrace();}返回 key.trim();}公共靜態 PublicKey makePublicKey(字符串存儲)拋出 GeneralSecurityException {byte[] data = Base64.getDecoder().decode(stored);X509EncodedKeySpec 規范 = 新 X509EncodedKeySpec(data);KeyFactory 事實 = KeyFactory.getInstance("RSA");返回 fact.generatePublic(spec);}公共靜態 PrivateKey makePrivateKey(字符串存儲)拋出 GeneralSecurityException {byte[] data = Base64.getDecoder().decode(stored);PKCS8EncodedKeySpec 規范 = 新 PKCS8EncodedKeySpec(data);KeyFactory 事實 = KeyFactory.getInstance("RSA");返回 fact.generatePrivate(spec);}公共靜態 void main(String[] args) 拋出異常 {掃描儀掃描 = 新的掃描儀(System.in)；System.out.println("輸入操作類型:");字符串線 = scan.nextLine();如果(line.equals(加密")){System.out.println("輸入原始ZIP文件名:");字符串 originalZipFileName = scan.nextLine();System.out.println("請輸入新 ZIP 文件的名稱:");字符串 newZipFileName = scan.nextLine();System.out.println("請輸入包含公鑰的文件名:");字符串 publicKeyFileName = scan.nextLine();加密(originalZipFileName，newZipFileName，publicKeyFileName)；}如果(line.equals(解密")){System.out.println("輸入原始ZIP文件名:");字符串 originalZipFileName = scan.nextLine();System.out.println("請輸入新 ZIP 文件的名稱:");字符串 newZipFileName = scan.nextLine();System.out.println("請輸入包含私鑰的文件名:");String privateKeyFileName = scan.nextLine();解密(originalZipFileName，newZipFileName，privateKeyFileName)；}}}

解決方案

您的私鑰不是 PKCS#8 格式.您必須向其添加關鍵算法信息以使其成為 PKCS#8，然后它才能工作.

您可能應該更改生成密鑰的方式，以使它們采用 PKCS#8 格式.但由于我對此一無所知，我將只展示如何使用 BouncyCastle 庫在您的應用程序中更新密鑰:

@Test公共 void testKey() 拋出異常 {串privKeyStr =MIICXQIBAAKBgQCE3pA746UfpC8sFk8ZJp0yupyJqj5jy6cjdxUYoP7mCm7c0mqQDeCcDNBYW2eSozCioPrH/9L + CDQEPLYakoem + jFnUKDH5 + PRU/0PJTJJF8Xh/ZT9eJlvsYBr1/qSfICf6RTs7kzwq9IuSZBw7/tfNEF9i0A8FVox6HOopXod1QIDAQABAoGANOFrYBqK5lvu1koOswDWQZFZqcSSzh8IZyoGwGWa7S0r0EECXlDXmuPSq8e9IfRG8ALHrH + ZlrbnFOSgyVSWHfpj3aH + qknoSX5TW2rMQHih8865xuqheMQ + RTZ7 + BRDqNsYkzxB/Z8mqzpoJQSYf + H7nWxdDCgAJVYZzxl3DmUCQQD32iEjnwiwUjii8slcmvCEZl + z84DWNdvJOg6Z38sI4AvrfpKc1WAcDg1rNZCKrRgokh54wpLt08cpFcrD04c3AkEAiTzDmc0bdgfg5wj6xHFZpYlBwiGm/bjOR2PS57P0GNU5PsDllRbFqIuzArITutO5lvZZImzuYz7Lf + cQ73pxUwJBAOdEwmdaneDo17A0m2 + TO3/nhqWDMVSwLMU3RyiNigZeCMFU + bkd4PBMrHi9IoJDwacZsRU9eZwxYEUV8H2Jg0ECQEEkOqRSm2pXKwX/WSjNtQPCNxhy6NUeV6vDUmTxIjh3XYjP/ynZeVEbnoj1BjB0N2/U11Jj6nPpZqb7gyppMEkCQQCoGdVYDipU+hMMnvxa0zOIyQc/a+HE0lESqn+2ZPafYi9Z1RldRMvUXhP8U7s+OuhRwprdw2ivvOFrnWyz9lL2";byte[] data = Base64.getDecoder().decode(privKeyStr);/* 添加 PKCS#8 格式 */ASN1EncodableVector v = new ASN1EncodableVector();v.add(new ASN1Integer(0));ASN1EncodableVector v2 = new ASN1EncodableVector();v2.add(new ASN1ObjectIdentifier(PKCSObjectIdentifiers.rsaEncryption.getId()));v2.add(DERNull.INSTANCE);v.add(新 DERSequence(v2));v.add(新DEROCtetString(數據))；ASN1Sequence seq = new DERSequence(v);byte[] privKey = seq.getEncoded("DER");PKCS8EncodedKeySpec 規范 = 新 PKCS8EncodedKeySpec(privKey);KeyFactory 事實 = KeyFactory.getInstance("RSA");PrivateKey key = fact.generatePrivate(spec);Assert.assertNotNull("生成私鑰失敗", key);}

I'm writing a program which takes as input from the console - the name of a zip file, name of a zip file to be made containig the (de/en)crypted files generated from the first zip and a file containing the public key. I get the exception when decrypting:

Exception in thread "main" java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException : algid parse error, not a sequence
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:217)
at java.security.KeyFactory.generatePrivate(KeyFactory.java:372)
at com.Main.makePrivateKey(Main.java:148)
at com.Main.decrypt(Main.java:40)
at com.Main.main(Main.java:182)
Caused by: java.security.InvalidKeyException: IOException : algid parse error, not a sequence
at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:351)
at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:356)
at sun.security.rsa.RSAPrivateCrtKeyImpl.<init>(RSAPrivateCrtKeyImpl.java:91)
at sun.security.rsa.RSAPrivateCrtKeyImpl.newKey(RSAPrivateCrtKeyImpl.java:75)
at sun.security.rsa.RSAKeyFactory.generatePrivate(RSAKeyFactory.java:316)
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:213)
... 4 more

Can't figure out why because the I use the rigth spec in the makePrivateKey method. The keys I'm testing with are(one line for a key each in a separate file):

Public key:

MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCE3pA746UfpC8sFk8ZJp0yupyJqj5jy6cjdxUYoP7mCm7c0mqQDeCcDNBYW2eSozCioPrH/9L+CDQEPLYakoem+jFnUKDH5+pru/0PJTJJF8Xh/ZT9eJlvsYBr1/qSfICf6RTs7kzwq9IuSZBw7/tfNEF9i0A8FVox6HOopXod1QIDAQAB

Private key:

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

The code for the program is bellow . Any help is wellcomed :)

package com;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.GeneralSecurityException;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Security;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;
import java.util.Enumeration;
import java.util.Scanner;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

import javax.crypto.Cipher;

public class Main {

public final static int BUFFER_SIZE = 117;

public static void decrypt(String originalZipFileName, String newZipFileName, String privateKeyFileName) throws Exception {
    byte[] buffer = new byte[BUFFER_SIZE];  

    ZipFile originalZipFile = new ZipFile(originalZipFileName); 
    ZipOutputStream newZipFile = new ZipOutputStream(new FileOutputStream(newZipFileName));

    Enumeration<? extends ZipEntry> zipEntries = originalZipFile.entries();

    String privateKey = getKeyString(privateKeyFileName);
    PrivateKey key = makePrivateKey(privateKey);

    Cipher cipher = Cipher.getInstance("RSA");

    cipher.init(Cipher.DECRYPT_MODE, key);
    File file = new File("temp.txt");

    while(zipEntries.hasMoreElements()){

        ZipEntry entry = zipEntries.nextElement();          

        ZipEntry copy = new ZipEntry(entry.getName());      
        newZipFile.putNextEntry(copy);

        int read;           
        InputStream inputEntry = originalZipFile.getInputStream(entry);
        OutputStream outputFile = new FileOutputStream(file);

        while((read = inputEntry.read(buffer)) != -1){              
            outputFile.write(cipher.doFinal(buffer), 0, read);
        }

        InputStream inputTempFile = new FileInputStream(file);

        while((read = inputTempFile.read(buffer)) != -1){
            newZipFile.write(buffer, 0, read);
        }

        newZipFile.closeEntry();
        inputEntry.close();
        inputTempFile.close();
        outputFile.close();
        file.delete();
    }
    newZipFile.close();
}

public static void encrypt(String originalZipFileName, String newZipFileName, String publicKeyFileName) throws Exception{

    byte[] buffer = new byte[BUFFER_SIZE];  

    ZipFile originalZipFile = new ZipFile(originalZipFileName); 
    ZipOutputStream newZipFile = new ZipOutputStream(new FileOutputStream(newZipFileName));

    Enumeration<? extends ZipEntry> zipEntries = originalZipFile.entries();

    String publicKey = getKeyString(publicKeyFileName);
    PublicKey key = makePublicKey(publicKey);

    Cipher cipher = Cipher.getInstance("RSA");

    cipher.init(Cipher.ENCRYPT_MODE, key);
    File file = new File("temp.txt");

    while(zipEntries.hasMoreElements()){

        ZipEntry entry = zipEntries.nextElement();          

        ZipEntry copy = new ZipEntry(entry.getName());      
        newZipFile.putNextEntry(copy);

        int read;           
        InputStream inputEntry = originalZipFile.getInputStream(entry);
        OutputStream outputFile = new FileOutputStream(file);

        while((read = inputEntry.read(buffer)) != -1){              
            outputFile.write(cipher.doFinal(buffer), 0, read);
        }

        InputStream inputTempFile = new FileInputStream(file);

        while((read = inputTempFile.read(buffer)) != -1){
            newZipFile.write(buffer, 0, read);
        }

        newZipFile.closeEntry();
        inputEntry.close();
        inputTempFile.close();
        outputFile.close();
        file.delete();
    }
    newZipFile.close();
}   

public static String getKeyString(String fileName){

    String key = new String();
    try {
        BufferedReader buf = new BufferedReader(new FileReader(fileName));
        key = buf.readLine();       
    } catch ( IOException e) {
        e.printStackTrace();
    }   

    return key.trim();
}

public static PublicKey makePublicKey(String stored) throws GeneralSecurityException {
    byte[] data = Base64.getDecoder().decode(stored);
    X509EncodedKeySpec spec = new  X509EncodedKeySpec(data);
    KeyFactory fact = KeyFactory.getInstance("RSA");
    return fact.generatePublic(spec);
}

public static PrivateKey makePrivateKey(String stored) throws GeneralSecurityException {
    byte[] data = Base64.getDecoder().decode(stored);
    PKCS8EncodedKeySpec spec = new  PKCS8EncodedKeySpec(data);
    KeyFactory fact = KeyFactory.getInstance("RSA");
    return fact.generatePrivate(spec);
}

public static void main(String[] args) throws Exception {

    Scanner scan = new Scanner(System.in);

    System.out.println("Enter type of operation:");
    String line = scan.nextLine();

    if(line.equals("encrypt")){
        System.out.println("Enter name of original ZIP file:");
        String originalZipFileName = scan.nextLine();

        System.out.println("Enter name of new ZIP file:");
        String newZipFileName = scan.nextLine();

        System.out.println("Enter name of file containg public key:");
        String publicKeyFileName = scan.nextLine();

        encrypt(originalZipFileName, newZipFileName, publicKeyFileName);        
    }
    if(line.equals("decrypt")){
        System.out.println("Enter name of original ZIP file:");
        String originalZipFileName = scan.nextLine();

        System.out.println("Enter name of new ZIP file:");
        String newZipFileName = scan.nextLine();

        System.out.println("Enter name of file containg private key:");
        String privateKeyFileName = scan.nextLine();

        decrypt(originalZipFileName, newZipFileName, privateKeyFileName);       
    }       

}

}

解決方案

Your private key is not in PKCS#8 format. You have to add key algorithm information to it to make it PKCS#8 and then it will work.

Probably you should alter the way you generate keys to have them in PKCS#8 format. But since I know nothing on that I will just show how to update key to it in your application using BouncyCastle library:

@Test
public void testKey() throws Exception {
    String privKeyStr = "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";
    byte[] data = Base64.getDecoder().decode(privKeyStr);

    /* Add PKCS#8 formatting */
    ASN1EncodableVector v = new ASN1EncodableVector();
    v.add(new ASN1Integer(0));
    ASN1EncodableVector v2 = new ASN1EncodableVector();
    v2.add(new ASN1ObjectIdentifier(PKCSObjectIdentifiers.rsaEncryption.getId()));
    v2.add(DERNull.INSTANCE);
    v.add(new DERSequence(v2));
    v.add(new DEROctetString(data));
    ASN1Sequence seq = new DERSequence(v);
    byte[] privKey = seq.getEncoded("DER");

    PKCS8EncodedKeySpec spec = new  PKCS8EncodedKeySpec(privKey);
    KeyFactory fact = KeyFactory.getInstance("RSA");
    PrivateKey key = fact.generatePrivate(spec);
    Assert.assertNotNull("Failed to generate the private key", key);
}

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InvalidKeySpecException:algid 解析錯誤，不是序列

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