blob: 9d2938e45d64d260d3fc688f8a6939891fd274af (
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
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.hosted.api;
import java.io.InputStream;
import java.net.URI;
import java.security.DigestInputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.concurrent.Callable;
import static java.nio.charset.StandardCharsets.UTF_8;
/**
* @author jonmv
*/
public class Signatures {
/** Returns the SHA-256 hash of the content in the implied input stream. */
public static byte[] sha256Digest(Callable<InputStream> in) {
try (DigestInputStream digester = sha256Digester(in.call())) {
byte[] buffer = new byte[1 << 10];
while (digester.read(buffer) != -1); // Consume the stream to compute the digest.
return digester.getMessageDigest().digest();
}
catch (IllegalStateException e) {
throw e;
}
catch (Exception e) {
throw new IllegalArgumentException(e);
}
}
/** Wraps the given input stream in a digester which computes a SHA 256 hash of the contents read through it. */
public static DigestInputStream sha256Digester(InputStream in) {
try {
return new DigestInputStream(in, MessageDigest.getInstance("SHA-256"));
}
catch (NoSuchAlgorithmException e) {
throw new IllegalStateException(e);
}
}
/** Returns a canonical representation of the given request data. */
public static byte[] canonicalMessageOf(String method, URI requestUri, String timestamp, String hash) {
return (method + "\n" + requestUri.normalize() + "\n" + timestamp + "\n" + hash).getBytes(UTF_8);
}
}
|
