4
我是RSA和密码学的新手,我需要使用RSA对数据进行加密和解密,我有一个java程序可以生成一个密钥对并将它们保存在一个.key
文件中,格式为XML格式(它绝对可以,它通过加密和解密数据进行测试),然后我想在.NET应用程序中使用它们,我导入用于加密和解密的密钥。公钥是OK,没有问题加密得到完成,但私有密钥导入失败,出现以下异常消息RSA密钥对导入私钥的例外
Bad data (CryptographicException.ThrowCryptogaphicException(Int32 hr))
这是编码的公共密钥:
<RSAKeyValue>
<Modulus>iFouk9viRs5dcvJCvDM1vXC4sBuSB9SPcdJhRyFLoNW/pka6MNAiu4cOksFRejiuM1ZswyJMy+ow
lmLflJ/XrfnUQxLwLp61oij4CrzHKl9jjHorqIA7uEQKY8RBiUjZ7kbO5nFaIWs1NWMVks8Srdhv
8pVd1sLKKUs66c/ndAk=</Modulus>
<Exponent>AQAB</Exponent>
</RSAKeyValue>
,这是编码的公共密钥:
<RSAKeyValue>
<Modulus>iFouk9viRs5dcvJCvDM1vXC4sBuSB9SPcdJhRyFLoNW/pka6MNAiu4cOksFRejiuM1ZswyJMy+ow
lmLflJ/XrfnUQxLwLp61oij4CrzHKl9jjHorqIA7uEQKY8RBiUjZ7kbO5nFaIWs1NWMVks8Srdhv
8pVd1sLKKUs66c/ndAk=</Modulus>
<Exponent>AQAB</Exponent>
<P>AO9WnDNOt9Xewnoy8KTed56Z+3Nfto6J8wCXKzX3LhuuiKNUBe8qFoinrteQJq/9NAEXnNCafxDW
ThIkr9GtMxE=</P>
<Q>AJHYMk0bOEGZlQbaJk3VDovvOJuRt5NI3WtXWl1v5VUW6aQQO3rV3+3GSN6Xa3hTKXtCVVL26Awy
OkDykUPjQXk=</Q>
<DP>KIHsJfLowlXVbIE6oWzVqg49tKU6bJ2Ed1Eeix+uuhisH5iU+ImTDsXynaFUKu0b5CNu8w9y+hKL
XB7BcydxQQ==</DP>
<DQ>di267NIersF1idzhZvY62FdbBmx4VaeYi+93sPkH2wA7CI+CsxF1Z6XhzETkd9bjaRaiLx0VgTR+
Eby8y0bt+Q==</DQ>
<InverseQ>HYF8gahVyzsz0IotzKI2Oh53sJMZWVxsvzkhqGlDtY1THFGZE5j8kl/UK0+FSN6yOYxBIuKNZ7om
MgLQEMK1PQ==</InverseQ>
<D>DERQvGyjxsr6DUVOS7AvvYNOmklgseOlpA/RQJz2ONoCC+uBBLM07LoRzZImymAfC+9SiZukXRQM
mvr6MlzPAm04NWyZNzbjhLvmn1gmvDclDZ9X9bhYp8MBftPWU5PFBALOjVpD+mlbI2lTYCugf6pJ
MHEMe17mNJ0eWCerfAE=</D>
</RSAKeyValue>
请帮我理解正在发生的事情和私人密钥有什么问题。
这是解决问题的工作后确定的代码:
private String getPublicKeyXml(RSAPublicKey pk) throws UnsupportedEncodingException {
StringBuilder builder = new StringBuilder();
builder.append("<RSAKeyValue>\n");
byte[] m = pk.getModulus().toByteArray();
byte[] mm = stripLeadingZeros(m);
write(builder, "Modulus", mm);
write(builder, "Exponent", pk.getPublicExponent());
builder.append("</RSAKeyValue>");
return builder.toString();
}
private String getPrivateKeyXml(PrivateKey pk) throws UnsupportedEncodingException {
RSAPrivateCrtKey privKey = (RSAPrivateCrtKey) pk;
BigInteger n = privKey.getModulus();
BigInteger e = privKey.getPublicExponent();
BigInteger d = privKey.getPrivateExponent();
BigInteger p = privKey.getPrimeP();
BigInteger q = privKey.getPrimeQ();
BigInteger dp = privKey.getPrimeExponentP();
BigInteger dq = privKey.getPrimeExponentQ();
BigInteger inverseQ = privKey.getCrtCoefficient();
StringBuilder builder = new StringBuilder();
builder.append("<RSAKeyValue>\n");
write(builder, "Modulus", stripLeadingZeros(n.toByteArray()));
write(builder, "Exponent", stripLeadingZeros(e.toByteArray()));
write(builder, "P", stripLeadingZeros(p.toByteArray()));
write(builder, "Q", stripLeadingZeros(q.toByteArray()));
write(builder, "DP", stripLeadingZeros(dp.toByteArray()));
write(builder, "DQ", stripLeadingZeros(dq.toByteArray()));
write(builder, "InverseQ", stripLeadingZeros(inverseQ.toByteArray()));
write(builder, "D", stripLeadingZeros(d.toByteArray()));
builder.append("</RSAKeyValue>");
return builder.toString();
}
private void write(StringBuilder builder, String tag, byte[] bigInt) throws UnsupportedEncodingException {
builder.append("\t<");
builder.append(tag);
builder.append(">");
builder.append(encode(bigInt).trim());
builder.append("</");
builder.append(tag);
builder.append(">\n");
}
private void write(StringBuilder builder, String tag, BigInteger bigInt) throws UnsupportedEncodingException {
builder.append("\t<");
builder.append(tag);
builder.append(">");
builder.append(encode(bigInt));
builder.append("</");
builder.append(tag);
builder.append(">\n");
}
private static String encode(BigInteger bigInt) throws UnsupportedEncodingException {
return new String(new sun.misc.BASE64Encoder().encode(bigInt.toByteArray()));
}
private static String encode(byte[] bigInt) throws UnsupportedEncodingException {
return new String(new sun.misc.BASE64Encoder().encode(bigInt));
}
private byte[] stripLeadingZeros(byte[] a) {
int lastZero = -1;
for (int i = 0; i < a.length; i++) {
if (a[i] == 0) {
lastZero = i;
} else {
break;
}
}
lastZero++;
byte[] result = new byte[a.length - lastZero];
System.arraycopy(a, lastZero, result, 0, result.length);
return result;
}
我已经解决了这个问题em由我自己,在P,Q,Modulus或其他键的私钥中显示的数据在其字节数组的前导(起始)处不应该包含零,所以当我消除了它们可能的零时,问题就消失了。 – Areff
请把它作为答案阿里夫发布。 Java确实会返回BigInteger值,如果你在BigInteger的实例上调用'toByteArray()',它将*返回带符号的表示。 *可能*包含第一个'00'h字节。由于模数始终具有密钥长度的大小并且具有最高位设置,所以'00'h总是被预置。请注意,其他值(包括私有指数)可能小于密钥大小,并且并非所有实现都接受更小的数组(在这方面不知道C#)。 –
Areff,如果你下次发帖,请确保你在你的问题中包含代码,也许在你的答案中包含一些代码?过一段时间后你可以接受你自己的答案。 –