我得到了一個帶有OAEP SHA-256填充的RSA公鑰和RSA私鑰。我試圖簡單地加密一個隨機字符串,然後解密它來聲明結果等於原來的。BadPaddingException RSA加密然後在java中解密
這是公鑰我一直在考慮:
-----BEGIN RSA PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq8tiBtDmkeS/ruY3rrkq
dz6Lc6XWFRbI/GjPtIokrtpM+Ujyv6wX8TBqY8e03gzh+eE7VUyEVPapDnceAqgJ
ZQah2h+N5AEQKqNDM4/1to1V0F+m1ISR7CIUU8dvU+bPk67DU5VkEtLxf+mW8/es
hy0u6oSB04WCDPNnh+9GDF7tN7lOzBH1FxKPWIb5Gqg6GoXS+KgvQhYEk0TajIBk
+mefzTv1D4HJlhFYybgY+/p3k4P2kM5HnbEtoVpz/PL9+94YVp5RBHTQHmk/3SAX
RkPP34IjY6LZqTJGWQGxc64Qci54ZJsq4wSTXvfdHgUWz7eX+v1jA+GLjFExNcYZ
nQIDAQAB
-----END RSA PUBLIC KEY-----
這是私鑰我一直在考慮:
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
我讀從PEM文件「crypt_pkcs8此鍵。 pem「,但是將公鑰恢復爲來自gRPC調用的字節數組。
這裏是我的Java代碼:
public class Encryption{
public static void main(String args){
ByteString publicKey = client.getPublicKey(nonce).getRSAEncryptionKey();
String strKeyPEM = "";
BufferedReader br = new BufferedReader(new FileReader("crypt_pkcs8.pem"));
String line;
while ((line = br.readLine()) != null) {
strKeyPEM += line+"\n";
}
br.close();
byte[] pt;
try {
pt = "h".getBytes("UTF-8");
byte[] ct =encrypt(publicKey, pt);
byte[] response= decrypt(strKeyPEM, ct);
assertEquals(pt, response);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static byte[] encrypt(ByteString rawKey ,byte[] message){
String strippedKey=stripKey(rawKey.toStringUtf8());
byte[] keyBytes = Base64.getDecoder().decode(strippedKey);
System.out.println(keyBytes.length);
Cipher cipher_RSA;
try {
cipher_RSA = Cipher.getInstance("RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING");
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes);
PublicKey pk = keyFactory.generatePublic(spec);
System.out.println(pk.getAlgorithm()+" format : "+pk.getFormat());
cipher_RSA.init(Cipher.ENCRYPT_MODE, pk);
return cipher_RSA.doFinal(message);
} catch (NoSuchAlgorithmException | NoSuchPaddingException | IllegalBlockSizeException |
BadPaddingException | InvalidKeyException | InvalidKeySpecException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}
public static byte[] decrypt(String rawKey ,byte[] message){
String strippedKey=stripPrivateKey(rawKey);
byte[] keyBytes = Base64.getDecoder().decode(strippedKey);
System.out.println(keyBytes.length);
Cipher cipher_RSA;
try {
cipher_RSA = Cipher.getInstance("RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING");
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(keyBytes);
PrivateKey pk = keyFactory.generatePrivate(spec);
System.out.println(pk.getAlgorithm()+" format : "+pk.getFormat());
cipher_RSA.init(Cipher.DECRYPT_MODE, pk);
return cipher_RSA.doFinal(message);
} catch (NoSuchAlgorithmException | NoSuchPaddingException | IllegalBlockSizeException |
BadPaddingException | InvalidKeyException | InvalidKeySpecException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}
public static String stripKey(String key){
key = key.replace("-----BEGIN RSA PUBLIC KEY-----\n", "");
key = key.replace("-----END RSA PUBLIC KEY-----", "");
key = key.replace("\n", "");
return key;
}
public static String stripPrivateKey(String key){
key = key.replace("-----BEGIN PRIVATE KEY-----", "");
key = key.replace("-----END PRIVATE KEY-----", "");
key = key.replace("\n", "");
return key;
}
}
我找不到任何明顯的錯誤與我的actaul代碼,所以我相信這是與鑰匙不匹配的事情。
我還注意到公鑰和私鑰的頁眉/頁腳是不同的。從網上查看這是因爲公鑰是PKCS#8格式。
我需要將公鑰更改爲pkcs#8格式嗎?如果是的話,最簡單的方法是什麼?
我也被告知我應該能夠從上面給出的私鑰中提取公鑰(以pkcs8格式)。這可以輕鬆完成嗎?
不要忘記從詹姆斯upvote [這個答案](https://stackoverflow.com/a/24768779/589259)! –