如何將模數結果從OpenSSL轉換爲Java BigInteger？

使用openssl，我可以得到如下格式，但是如果我想在我的RSAPrivatekeySpec中使用這個模數，我將如何將模數轉換爲BigInteger？謝謝！以下只是一個例子。如何將模數結果從OpenSSL轉換爲Java BigInteger？

Modulus (2048 bit): 
     00:98:10:23:16:ff:b6:f4:26:a2:42:a6:19:23:0e: 
     0f:27:4a:b9:43:3d:a0:4b:b9:1b:1a:57:92:dd:a8: 
     bc:5d:b8:6e:e6:7f:0f:2e:89:a5:77:16:d1:cf:44: 
     69:74:2b:b1:a9:dd:72:bd:a8:9c:aa:90:ca:7b:f4: 
     d3:d3:db:11:98:bd:61:f1:2c:77:41:ad:c4:42:6a: 
     88:d1:37:04:12:a9:36:ec:09:34:0d:31:71:b9:5a: 
     ea:ed:ce:61:1c:1e:5f:6c:9e:28:ee:21:2a:e4:c6: 
     1f:75:29:78:a5:96:b1:53:17:4d:bf:88:d1:12:5c: 
     a6:75:aa:7c:fe:23:a8:dd:25:35:46:c6:8a:eb:2e: 
     e4:a3:1d:7f:b6:6d:9c:7d:66:59:84:c9:51:15:82: 
     67:a6:85:e9:c8:d6:2b:a7:e6:28:08:d2:b1:99:92: 
     67:32:c4:ba:f7:c9:1a:16:30:e5:cb:39:cb:96:28: 
     70:32:ba:18:d2:64:2f:74:3e:dd:09:e0:68:56:57: 
     cf:50:63:c0:95:a9:b0:5b:2a:ad:21:4f:bd:e7:15: 
     64:4a:9d:e4:c5:c3:5c:35:bf:e6:78:f4:8a:40:83: 
     da:7d:0d:6c:02:60:4a:3f:0c:9c:03:fd:48:e6:72: 
     f3:0d:5b:90:6b:de:59:58:c9:f4:26:4a:61:b4:52: 
     21:1d 
    Exponent: 65537 (0x10001)

來源

2012-02-15 sammiwei

下面是一個小例子，說明了這樣做的一種方法。

public class OpensslIntToBigInteger { 

    public static BigInteger opensslBigToBigInteger(String opensslInt) 
    { 
     String hexInt = opensslInt.replaceAll(":", ""); 
     hexInt = hexInt.replaceAll("\\s+", ""); 
     return new BigInteger(hexInt, 16); 
    } 
    public static void main(String[] args) { 

     String opensslInt = 
       "  00:98:10:23:16:ff:b6:f4:26:a2:42:a6:19:23:0e:\n" + 
       "  0f:27:4a:b9:43:3d:a0:4b:b9:1b:1a:57:92:dd:a8:\n" + 
       "  bc:5d:b8:6e:e6:7f:0f:2e:89:a5:77:16:d1:cf:44:\n" + 
       "  69:74:2b:b1:a9:dd:72:bd:a8:9c:aa:90:ca:7b:f4:\n" + 
       "  d3:d3:db:11:98:bd:61:f1:2c:77:41:ad:c4:42:6a:\n" + 
       "  88:d1:37:04:12:a9:36:ec:09:34:0d:31:71:b9:5a:\n" + 
       "  ea:ed:ce:61:1c:1e:5f:6c:9e:28:ee:21:2a:e4:c6:\n" + 
       "  1f:75:29:78:a5:96:b1:53:17:4d:bf:88:d1:12:5c:\n" + 
       "  a6:75:aa:7c:fe:23:a8:dd:25:35:46:c6:8a:eb:2e:\n" + 
       "  e4:a3:1d:7f:b6:6d:9c:7d:66:59:84:c9:51:15:82:\n" + 
       "  67:a6:85:e9:c8:d6:2b:a7:e6:28:08:d2:b1:99:92:\n" + 
       "  67:32:c4:ba:f7:c9:1a:16:30:e5:cb:39:cb:96:28:\n" + 
       "  70:32:ba:18:d2:64:2f:74:3e:dd:09:e0:68:56:57:\n" + 
       "  cf:50:63:c0:95:a9:b0:5b:2a:ad:21:4f:bd:e7:15:\n" + 
       "  64:4a:9d:e4:c5:c3:5c:35:bf:e6:78:f4:8a:40:83:\n" + 
       "  da:7d:0d:6c:02:60:4a:3f:0c:9c:03:fd:48:e6:72:\n" + 
       "  f3:0d:5b:90:6b:de:59:58:c9:f4:26:4a:61:b4:52:\n" + 
       "  21:1d"; 

     BigInteger modulus = opensslBigToBigInteger(opensslInt); 
     System.out.println(modulus.toString(16)); 
    } 
}

來源

2012-02-15 23:39:15

如何將模數結果從OpenSSL轉換爲Java BigInteger？

回答

相關問題