字符串轉換爲私人和公共密鑰（RSA）

Question

兩個字符串是私鑰和公鑰是：

static String Public =   
     "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDH+wPrKYG1KVlzQUVtBghR8n9d" + "/n" + 
    "zcShSZo0+3KgyVdOea7Ei7vQ1U4wRn1zlI5rSqHDzFitblmqnB2anzVvdQxLQ3Uq" + "/n" + 
    "EBKBfMihnLgCSW8Xf7MCH+DSGHNvBg2xSNhcfEmnbLPLnbuz4ySn1UB0lH2eqxy5" + "/n"+ 
    "0zstxhTY0binD9Y+rwIDAQAB"+ "/n"; 
    static String Private = 
     "MIICxjBABgkqhkiG9w0BBQ0wMzAbBgkqhkiG9w0BBQwwDgQIr5NQ/LYPG/UCAggA" +"/n"+ 
     "MBQGCCqGSIb3DQMHBAiLh89iGSkmoASCAoBCpAo9/IzDE3yGhvWr9RgozE7revOo" +"/n"+ 
      "V2OXmU+d0+WYAAx2GYVaUCbFVrmgiVmrbiTgLUMXAGIpvxQ2rzyIvRHW/RN3Gcky" +"/n"+ 
     "qR/AwBatzixqrnoS4aD1/Ovjr4hwde4XHYbPEilZZuVAJFiznhy73qm/So4XghSY........." ; 

我已經閱讀了其他問題，並試圖解決它們，但沒有工作....我有一個公鑰和私鑰都作爲字符串..我需要將它們轉換爲'鑰匙'，但我不斷得到java.security.spec.InvalidKeySpecException：java.security.InvalidKeyException ..我generatePublic和generatePrivate函數..也是關鍵是隻是爲了測試，因此，如果他人知道其他人可以...

 public static Key loadPublicKey(String stored) throws GeneralSecurityException, IOException 
     { 
     byte[] data = Base64.getDecoder().decode((stored.getBytes())); 
     X509EncodedKeySpec spec = new X509EncodedKeySpec(data); 
     KeyFactory fact = KeyFactory.getInstance("RSA"); 
     return fact.generatePublic(spec); 

     } 


public static Key loadPrivateKey(String key64) throws  GeneralSecurityException, IOException { 
     byte[] clear = Base64.getDecoder().decode(key64.getBytes()); 
     PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(clear); 
     KeyFactory fact = KeyFactory.getInstance("RSA"); 
     PrivateKey priv = fact.generatePrivate(keySpec); 
     Arrays.fill(clear, (byte) 0); 
     return priv; 

    } 

Answer 1

刪除字符串聲明中的行Feed。這是不是關鍵的一部分：

static String Public =   
     "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDH+wPrKYG1KVlzQUVtBghR8n9d" + 
    "zcShSZo0+3KgyVdOea7Ei7vQ1U4wRn1zlI5rSqHDzFitblmqnB2anzVvdQxLQ3Uq" + 
    "EBKBfMihnLgCSW8Xf7MCH+DSGHNvBg2xSNhcfEmnbLPLnbuz4ySn1UB0lH2eqxy5" + 
    "0zstxhTY0binD9Y+rwIDAQAB"; 
static String Private = 
     "MIICxjBABgkqhkiG9w0BBQ0wMzAbBgkqhkiG9w0BBQwwDgQIr5NQ/LYPG/UCAggA" + 
     "MBQGCCqGSIb3DQMHBAiLh89iGSkmoASCAoBCpAo9/IzDE3yGhvWr9RgozE7revOo" + 
      "V2OXmU+d0+WYAAx2GYVaUCbFVrmgiVmrbiTgLUMXAGIpvxQ2rzyIvRHW/RN3Gcky" + 
     "qR/AwBatzixqrnoS4aD1/Ovjr4hwde4XHYbPEilZZuVAJFiznhy73qm/So4XghSY........." ; 

我已經用下面的代碼試了一下：

public static void main(String[] args) throws GeneralSecurityException, IOException { 
     System.out.println(loadPublicKey(Public)); 

    } 

    public static Key loadPublicKey(String stored) throws GeneralSecurityException, IOException 
    { 
byte[] data = Base64.getDecoder().decode((stored.getBytes())); 
X509EncodedKeySpec spec = new X509EncodedKeySpec(data); 
KeyFactory fact = KeyFactory.getInstance("RSA"); 
return fact.generatePublic(spec); 

    } 

和輸出端：

Sun RSA public key, 1024 bits 
    modulus: 140431102839105138202102866401190456107365606715815288536913018579006717438700259314092212104831553250527764925385527697411165705192297577022746989837839401358787285684108054389360182109284048524426941021357601686464156659759470495649944686235380003772357268264646549523784880655065600797504478771675703688879 
    public exponent: 65537