C#和Java有什么区别和联系

私钥

C#使用的是标准的RSA格式，PKCS#1语法中包含了标准RSA格式私钥中的所有整数值。配置对象需要生成PKCS#1语法的RSA对象（RSAPrivateCrtKey），获取对象属性，自行构造私钥XML。

private static String getRSAPrivateKeyAsNetFormat(byte[] encodedPrivateKey) { 
try { 
StringBuffer buff = new StringBuffer(1024); 
PKCS8EncodedKeySpec pvkKeySpec = new PKCS8EncodedKeySpec(encodedPrivateKey); 
KeyFactory keyFactory = KeyFactory.getInstance("RSA"); 
RSAPrivateCrtKey pvkKey = (RSAPrivateCrtKey) keyFactory.generatePrivate(pvkKeySpec); 
buff.append("<RSAKeyValue>"); 
buff.append("<Modulus>" + encodeBase64(removeMSZero(pvkKey.getModulus().toByteArray())) + "</Modulus>");
buff.append("<Exponent>" + encodeBase64(removeMSZero(pvkKey.getPublicExponent()toByteArray())) + "</Exponent>");
buff.append("<P>" + encodeBase64(removeMSZero(pvkKey.getPrimeP().toByteArray())) + "</P>");
buff.append("<Q>" + encodeBase64(removeMSZero(pvkKey.getPrimeQ().toByteArray())) + "</Q>");
buff.append("<DP>" + encodeBase64(removeMSZero(pvkKey.getPrimeExponentP().toByteArray())) + "</DP>"); 
buff.append("<DQ>" + encodeBase64(removeMSZero(pvkKey.getPrimeExponentQ().toByteArray())) + "</DQ>");
buff.append("<InverseQ>" + encodeBase64(removeMSZero(pvkKey.getCrtCoefficient().toByteArray())) + "</InverseQ>");
buff.append("<D>" + encodeBase64(removeMSZero(pvkKey.getPrivateExponent().toByteArray())) + "</D>"); 
buff.append("</RSAKeyValue>"); 
return buff.toString(); 
} catch (Exception e) { 
System.err.println(e); 
return null; 
} 
}

private static String getRSAPublicKeyAsNetFormat(byte[] encodedPublicKey) { 
try { 
StringBuffer buff = new StringBuffer(1024);
//Only RSAPublicKeySpec and X509EncodedKeySpec supported for RSA public keys 
KeyFactory keyFactory = KeyFactory.getInstance("RSA"); 
RSAPublicKey pukKey = (RSAPublicKey) keyFactory.generatePublic(new X509EncodedKeySpec(encodedPublicKey)); 
buff.append("<RSAKeyValue>"); 
buff.append("<Modulus>" + encodeBase64(removeMSZero(pukKey.getModulus().toByteArray())) + "</Modulus>"); 
buff.append("<Exponent>" + encodeBase64(removeMSZero(pukKey.getPublicExponent().toByteArray())) + "</Exponent>"); 
buff.append("</RSAKeyValue>"); 
return buff.toString(); 
} catch (Exception e) { 
System.err.println(e); 
return null; 
} 
}