public static String encrypt(String data) throws Exception {
byte[] bytes = Base64.decode(publicKey);//publicKey 公钥
X509EncodedKeySpec spec = new X509EncodedKeySpec(bytes);
KeyFactory factory = KeyFactory.getInstance("RSA");
PublicKey publicKey = factory.generatePublic(spec);
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
int inputLen = data.getBytes().length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offset = 0;
byte[] cache;
int i = 0;
while (inputLen - offset > 0) {
if (inputLen - offset > 117) {
cache = cipher.doFinal(data.getBytes(), offset, 117);
} else {
cache = cipher.doFinal(data.getBytes(), offset, inputLen - offset);
}
out.write(cache, 0, cache.length);
i++;
offset = i * 117;
}
byte[] encryptedData = out.toByteArray();
out.close();
return Base64.encode(encryptedData);
}
