SignUtils.java
1.03 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
package com.zteits.pay.util;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;
public class SignUtils {
private static final String ALGORITHM = "RSA";
private static final String SIGN_ALGORITHMS = "SHA1WithRSA";
private static final String DEFAULT_CHARSET = "UTF-8";
public static String sign(String content, String privateKey) {
try {
PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec(
Base64.decode(privateKey));
KeyFactory keyf = KeyFactory.getInstance(ALGORITHM);
PrivateKey priKey = keyf.generatePrivate(priPKCS8);
java.security.Signature signature = java.security.Signature
.getInstance(SIGN_ALGORITHMS);
signature.initSign(priKey);
signature.update(content.getBytes(DEFAULT_CHARSET));
byte[] signed = signature.sign();
return Base64.encode(signed);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}