如何解析內存字符串以獲取私鑰和​​公鑰RSA

Question

我能夠直接從文件中讀取公鑰和私鑰，因爲文件流將其轉換爲PublicKey和PrivateKey Object。但如果作爲字符串加載失敗。

工作代碼

public static RSAPrivateKey getPrivateKey(String filename) throws IOException, GeneralSecurityException { 

      PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(
        IOUtils.toByteArray(new FileInputStream(filename))); 
      return (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(pkcs8EncodedKeySpec); 
     } 

     public static RSAPublicKey getPublicKey(String filename) throws IOException, GeneralSecurityException { 
      X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(
        IOUtils.toByteArray(new FileInputStream(filename))); 
      return (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(x509EncodedKeySpec); 
     } 

public static void main(String[] args) throws JOSEException, ParseException, IOException, GeneralSecurityException { 

     String publicKeyPathName = "../public"; 
     String privateKeyPathName = "../private"; 
     /// loading from file 
     RSAPublicKey publicKey = new MYClass().getPublicKey(publicKeyPathName); 
     RSAPrivateKey privateKey = new MYClass().getPrivateKey(privateKeyPathName); 
} 

不工作密碼

public static RSAPrivateKey parsePrivateKey(String content) throws IOException, GeneralSecurityException { 
     content = content.replaceAll("\\n", "").replace("-----BEGIN RSA PRIVATE KEY-----", "") 
       .replace("-----END RSA PRIVATE KEY-----", ""); 
     PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(content.getBytes(StandardCharsets.UTF_8)); 
     return (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(pkcs8EncodedKeySpec); 
    } 

    public static RSAPublicKey parsePublicKey(String content) throws IOException, GeneralSecurityException { 
     content = content.replaceAll("\\n", "").replace("-----BEGIN PUBLIC KEY-----", "") 
       .replace("-----END PUBLIC KEY-----", ""); 
     X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(content.getBytes(StandardCharsets.UTF_8)); 
     return (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(x509EncodedKeySpec); 
    } 
public String getPublicKey() { 
     return "-----BEGIN PUBLIC KEY-----\n" 
       + "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAswPxKZWJEQ0RVtiaoFIU" 
       + "jndalEp2sZF87Cy9IxW1FxxcfDmZRlkMDe+5X1lzpOjFHP8mBZa8vhMjSKbJY2wt" 
       + "MyxckbBoTjAIefi34KuD0Q6j9LRt1r1iQ+nMYezk5N83ruqyRHtB4a8AOkw3iE2z" 
       + "zA74uAkCzPiYUrAES1I9mVbpxJZf2Ej0px6drkd4OQ2aPnwR13gWTnmqFWV+Xkl6" 
       + "WapMArewaAUXU9zDqjn4ZpNCkgx6m4CK7PDt+VgYUi+sjI0WzPIb0FMDTYSe1iX6" 
       + "mfIabvoetxUmtyQgu4RfHIiOF0no6VEPh31of2B+KZX2OjHKjyKBGUxUkDLm+J2J" 
       + "CwIDAQAB\n" 
       + "-----END PUBLIC KEY-----"; 
    } 

    public String getPrivateKey() { 
     return "-----BEGIN RSA PRIVATE KEY-----\n" 
       + "MIIEowIBAAKCAQEAswPxKZWJEQ0RVtiaoFIUjndalEp2sZF87Cy9IxW1FxxcfDmZ" 
       + "RlkMDe+5X1lzpOjFHP8mBZa8vhMjSKbJY2wtMyxckbBoTjAIefi34KuD0Q6j9LRt" 
+ "1r1iQ+nMYezk5N83ruqyRHtB4a8AOkw3iE2zzA74uAkCzPiYUrAES1I9mVbpxJZf" 
+ "2Ej0px6drkd4OQ2aPnwR13gWTnmqFWV+Xkl6WapMArewaAUXU9zDqjn4ZpNCkgx6" 
+ "m4CK7PDt+VgYUi+sjI0WzPIb0FMDTYSe1iX6mfIabvoetxUmtyQgu4RfHIiOF0no" 
+ "6VEPh31of2B+KZX2OjHKjyKBGUxUkDLm+J2JCwIDAQABAoIBAFj59p4SoyQEeL/P" 
+ "vVs+MNV24WCfektb4tmIiyGrIm0wPY/JGTPsAp/SrTKFRYOL5p04/G7+syVOYdU0" 
+ "gRiXpgevXvtS0SU7nprxUoOq/EOmoTt5iraXPwY+aMWrd0GC6SxZnu2GzgIcd2KC" 
+ "i3+GD323W0wtvmSekydWMWw2nkNeKCL8WE/GqLjigRzdGl+RVviGC+N3IsZZvcf0" 
+ "toNXTxXBPgtcYYWV7MOLsFQkk1yvKh0ISncswkjmkRChi8KQ178hbIzeBuDq+jlY" 
+ "11epFjNUpyw2Y3jRHHkVSFKFaE6GeBpHMC0ucBJxyRzw19DZ+iPGI2xZBmW+wEOE" 
+ "+khw1WECgYEA6ETt3I9zszzytqh5jBma04EM08+aOw9+CVcCLWSC17vRBOiPGJTE" 
+ "bHq6Ln7+pjIErSTrlXOH6kPV0nRzmSDncsttmNXLKCuJUR5stVl/gQY4uaGesF/x" 
+ "Kk/orw/ddibukXiXHAkduZXC+3Wq4TaYHChUz/QZv/gamPSusi1zBlMCgYEAxU4k" 
+ "gJyKLqKfAXsrX0ilyvwkP4siwzORS1GFU5WfMf0E3ZD/3FMjmhjOLX5vnnWcIFtN" 
+ "ERungsyHF0AG5o23HTHkEIi2aZWnC2GiYfpEAJuLhkx08aO65o26RxeC7MOAgL1y" 
+ "0wC/b8ceIQkQuYbqdrPBywHry7+/vtPbHOggK2kCgYBIv+Y8shXMKyfefFBtyEtN" 
+ "Odt5sEmffA++/yiobRXqWmJyhiDj0xze2WXdUFuUVJBQZwL+8Yu9nXeojl7ytHKp" 
+ "6vut5jDWqSQ+aygjeR/NmtRDmFKq7bIMzbCUvIRiEHmiyMGTv2s3CKhkuItINSBZ" 
+ "mWxPIia6kQxLoj/hgQjJDwKBgGNTU0zrgSS4+RLlzo/JIq1tAVJ72KQr8ZjZESVi" 
+ "zSF9HlXsCOIBeIq6shB09fvveQlQ7RsPsORH0joCIXcvIF+yHf201R+SFuXD4Nsy" 
+ "AcnMhBC3rKd4pT4rWvsu+tn2EVq+BG/0kGrU8nXu+lxrbt0S4Rwxe2K2xPBr9oI2" 
+ "2PsBAoGBAJHPPAire0lHcPi+J8YkVKuzwEfP7NgeLZdtqjiZBCZiLoP8SRm68FJS" 
+ "2UpGX4K7rQhx66H6UwXHylBfush56Z8Y9g7PYel83sy+4bqjod1a5TqNBJMkhDQi" 
+ "DrQmDIfpFoRYcOyB4+BeF/w7wL+R5ofov4T+0vB3ST+aztphp2G4\n" 
+ "-----END RSA PRIVATE KEY-----"; 
    } 

public static void main(String[] args) throws JOSEException, ParseException, IOException, GeneralSecurityException { 

String publicKeyString = new MyClass().getPublicKey(); 
     RSAPublicKey publicKey = new MyClass().parsePublicKey(publicKeyString); 

     String privateKeyString = new MyClass().getPrivateKey(); 
     RSAPrivateKey privateKey = new 
     MyClass().parsePrivateKey(privateKeyString); 

} 

我試着不除去第一線，並嘗試讀取該文件作爲字符串。沒有一個或工作。告訴我使用這個的正確方法。

我得到的錯誤是

異常線程 「main」 java.security.spec.InvalidKeySpecException： java.security.InvalidKeyException：在 sun.security.rsa.RSAKeyFactory無效密鑰格式。 engine.GeneratePublic（RSAKeyFactory.java:205） at java.security.KeyFactory.generatePublic（KeyFactory.java:334）at j.MyClass.parsePublicKey（MyClass.java:136）at j.MyClass.main（MyClass.java： 223）由： java.security.InvalidKeyException：無效的密鑰格式爲 sun.security.x509.X509Key.d ecode（X509Key.java:387）at sun.security.x509.X509Key.decode（X509Key.java:403）at sun.security.rsa.RSAPublicKeyImpl。（RSAPublicKeyImpl.java:84）at sun.security.rsa .RSAKeyFactory.generatePublic在 sun.security.rsa.RSAKeyFactory.engineGeneratePublic（RSAKeyFactory.java:201）（RSAKeyFactory.java:298） ... 3個

我的用例是，

從數據庫中讀取密鑰並進行轉換。

Answer 1

您正在使用content.getBytes(StandardCharsets.UTF_8)而不是基於64解碼PEM頁眉和頁腳行內的文本（從-----開始）。