public static void main(String[] args) {
try{
String mod = "q0AwozeUj0VVkoksDQSCTj3QEgODomq4sAr02xMyIrWldZrNHhWfZAIcWt2MuAY3X6S3ZVUfOFXOrVbltRrO3F9Z6R8/jJIMv7wjkeVBFC5gncwGR0C3aV9gmF6II19jTKfF1sxb26iMEMAlMEOSnAAceNaJH91zBoaW7ZIh+qk=";
String exp = "AQAB";
byte[] modulusBytes = Base64.decodeBase64(mod.getBytes("UTF-8"));
byte[] exponentBytes = Base64.decodeBase64(exp.getBytes("UTF-8"));
String signedMessage = "3753e672cfb21e3c182ef2df51f19edeffb63432ed338a47251326ccc14aa63883e910a140cf313754ebc6425aad434e309307cc882da6cd4a4f9f40bd14a9823aca145e5ffc97cd63dbb5925c049282416bdfd7d74ddeef7055065210a841793fe315dff5a44af19c1522daafdc2f7e61ce5a2b42ebf79dfb086e6d210168dd";
BigInteger modulus = new BigInteger(1, modulusBytes);
BigInteger exponent = new BigInteger(1, exponentBytes);
RSAPublicKeySpec rsaPubKey = new RSAPublicKeySpec(modulus, exponent);
KeyFactory fact = KeyFactory.getInstance("RSA");
PublicKey pubKey = fact.generatePublic(rsaPubKey);
Signature signature = Signature.getInstance("SHA1withRSA");
byte[] sigBytes = hexStringToByteArray(signedMessage);
signature.initVerify(pubKey);
System.out.println(signature.verify(sigBytes));
}catch(Exception e){
System.out.println("Error: " + e.toString());
}
}
private static byte[] hexStringToByteArray(final String encoded) {
if ((encoded.length() % 2) != 0)
throw new IllegalArgumentException("Input string must contain an even number of characters");
final byte result[] = new byte[encoded.length()/2];
final char enc[] = encoded.toCharArray();
for (int i = 0; i < enc.length; i += 2) {
StringBuilder curr = new StringBuilder(2);
curr.append(enc[i]).append(enc[i + 1]);
result[i/2] = (byte) Integer.parseInt(curr.toString(), 16);
}
return result;
}
此代碼始終返回false。我不確定該從哪裏出發。signature.verify()總是返回False
您正在驗證什麼都沒有。如果您的簽名也是爲空數據生成的,它只會返回true。 – 2010-06-30 17:00:47
我以爲我正在驗證它對sigBytes。你知道我會如何解決這個問題嗎? – Jimmy 2010-06-30 17:07:20