a geicko-2 based round robin ranking system designed to test c++ battleship submissions
battleship.dunkirk.sh
dunkirk.sh
1// Copyright 2012 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package ssh
6
7// Message authentication support
8
9import (
10 "crypto/hmac"
11 "crypto/sha1"
12 "crypto/sha256"
13 "crypto/sha512"
14 "hash"
15)
16
17type macMode struct {
18 keySize int
19 etm bool
20 new func(key []byte) hash.Hash
21}
22
23// truncatingMAC wraps around a hash.Hash and truncates the output digest to
24// a given size.
25type truncatingMAC struct {
26 length int
27 hmac hash.Hash
28}
29
30func (t truncatingMAC) Write(data []byte) (int, error) {
31 return t.hmac.Write(data)
32}
33
34func (t truncatingMAC) Sum(in []byte) []byte {
35 out := t.hmac.Sum(in)
36 return out[:len(in)+t.length]
37}
38
39func (t truncatingMAC) Reset() {
40 t.hmac.Reset()
41}
42
43func (t truncatingMAC) Size() int {
44 return t.length
45}
46
47func (t truncatingMAC) BlockSize() int { return t.hmac.BlockSize() }
48
49var macModes = map[string]*macMode{
50 HMACSHA512ETM: {64, true, func(key []byte) hash.Hash {
51 return hmac.New(sha512.New, key)
52 }},
53 HMACSHA256ETM: {32, true, func(key []byte) hash.Hash {
54 return hmac.New(sha256.New, key)
55 }},
56 HMACSHA512: {64, false, func(key []byte) hash.Hash {
57 return hmac.New(sha512.New, key)
58 }},
59 HMACSHA256: {32, false, func(key []byte) hash.Hash {
60 return hmac.New(sha256.New, key)
61 }},
62 HMACSHA1: {20, false, func(key []byte) hash.Hash {
63 return hmac.New(sha1.New, key)
64 }},
65 InsecureHMACSHA196: {20, false, func(key []byte) hash.Hash {
66 return truncatingMAC{12, hmac.New(sha1.New, key)}
67 }},
68}