blob: ee51c24351c3d4ead01388fe0041302342491074 (
plain) (
blame)
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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hive.service;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.Log;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* The cookie signer generates a signature based on SHA digest
* and appends it to the cookie value generated at the
* server side. It uses SHA digest algorithm to sign and verify signatures.
*/
public class CookieSigner {
private static final String SIGNATURE = "&s=";
private static final String SHA_STRING = "SHA";
private byte[] secretBytes;
private static final Log LOG = LogFactory.getLog(CookieSigner.class);
/**
* Constructor
* @param secret Secret Bytes
*/
public CookieSigner(byte[] secret) {
if (secret == null) {
throw new IllegalArgumentException(" NULL Secret Bytes");
}
this.secretBytes = secret.clone();
}
/**
* Sign the cookie given the string token as input.
* @param str Input token
* @return Signed token that can be used to create a cookie
*/
public String signCookie(String str) {
if (str == null || str.isEmpty()) {
throw new IllegalArgumentException("NULL or empty string to sign");
}
String signature = getSignature(str);
if (LOG.isDebugEnabled()) {
LOG.debug("Signature generated for " + str + " is " + signature);
}
return str + SIGNATURE + signature;
}
/**
* Verify a signed string and extracts the original string.
* @param signedStr The already signed string
* @return Raw Value of the string without the signature
*/
public String verifyAndExtract(String signedStr) {
int index = signedStr.lastIndexOf(SIGNATURE);
if (index == -1) {
throw new IllegalArgumentException("Invalid input sign: " + signedStr);
}
String originalSignature = signedStr.substring(index + SIGNATURE.length());
String rawValue = signedStr.substring(0, index);
String currentSignature = getSignature(rawValue);
if (LOG.isDebugEnabled()) {
LOG.debug("Signature generated for " + rawValue + " inside verify is " + currentSignature);
}
if (!originalSignature.equals(currentSignature)) {
throw new IllegalArgumentException("Invalid sign, original = " + originalSignature +
" current = " + currentSignature);
}
return rawValue;
}
/**
* Get the signature of the input string based on SHA digest algorithm.
* @param str Input token
* @return Signed String
*/
private String getSignature(String str) {
try {
MessageDigest md = MessageDigest.getInstance(SHA_STRING);
md.update(str.getBytes());
md.update(secretBytes);
byte[] digest = md.digest();
return new Base64(0).encodeToString(digest);
} catch (NoSuchAlgorithmException ex) {
throw new RuntimeException("Invalid SHA digest String: " + SHA_STRING +
" " + ex.getMessage(), ex);
}
}
}
|
