/usr/share/gocode/src/golang.org/x/crypto/ssh/cipher_test.go is in golang-golang-x-crypto-dev 1:0.0~git20170629.0.5ef0053-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | // Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ssh
import (
"bytes"
"crypto"
"crypto/aes"
"crypto/rand"
"testing"
)
func TestDefaultCiphersExist(t *testing.T) {
for _, cipherAlgo := range supportedCiphers {
if _, ok := cipherModes[cipherAlgo]; !ok {
t.Errorf("default cipher %q is unknown", cipherAlgo)
}
}
}
func TestPacketCiphers(t *testing.T) {
// Still test aes128cbc cipher although it's commented out.
cipherModes[aes128cbcID] = &streamCipherMode{16, aes.BlockSize, 0, nil}
defer delete(cipherModes, aes128cbcID)
for cipher := range cipherModes {
for mac := range macModes {
kr := &kexResult{Hash: crypto.SHA1}
algs := directionAlgorithms{
Cipher: cipher,
MAC: mac,
Compression: "none",
}
client, err := newPacketCipher(clientKeys, algs, kr)
if err != nil {
t.Errorf("newPacketCipher(client, %q, %q): %v", cipher, mac, err)
continue
}
server, err := newPacketCipher(clientKeys, algs, kr)
if err != nil {
t.Errorf("newPacketCipher(client, %q, %q): %v", cipher, mac, err)
continue
}
want := "bla bla"
input := []byte(want)
buf := &bytes.Buffer{}
if err := client.writePacket(0, buf, rand.Reader, input); err != nil {
t.Errorf("writePacket(%q, %q): %v", cipher, mac, err)
continue
}
packet, err := server.readPacket(0, buf)
if err != nil {
t.Errorf("readPacket(%q, %q): %v", cipher, mac, err)
continue
}
if string(packet) != want {
t.Errorf("roundtrip(%q, %q): got %q, want %q", cipher, mac, packet, want)
}
}
}
}
func TestCBCOracleCounterMeasure(t *testing.T) {
cipherModes[aes128cbcID] = &streamCipherMode{16, aes.BlockSize, 0, nil}
defer delete(cipherModes, aes128cbcID)
kr := &kexResult{Hash: crypto.SHA1}
algs := directionAlgorithms{
Cipher: aes128cbcID,
MAC: "hmac-sha1",
Compression: "none",
}
client, err := newPacketCipher(clientKeys, algs, kr)
if err != nil {
t.Fatalf("newPacketCipher(client): %v", err)
}
want := "bla bla"
input := []byte(want)
buf := &bytes.Buffer{}
if err := client.writePacket(0, buf, rand.Reader, input); err != nil {
t.Errorf("writePacket: %v", err)
}
packetSize := buf.Len()
buf.Write(make([]byte, 2*maxPacket))
// We corrupt each byte, but this usually will only test the
// 'packet too large' or 'MAC failure' cases.
lastRead := -1
for i := 0; i < packetSize; i++ {
server, err := newPacketCipher(clientKeys, algs, kr)
if err != nil {
t.Fatalf("newPacketCipher(client): %v", err)
}
fresh := &bytes.Buffer{}
fresh.Write(buf.Bytes())
fresh.Bytes()[i] ^= 0x01
before := fresh.Len()
_, err = server.readPacket(0, fresh)
if err == nil {
t.Errorf("corrupt byte %d: readPacket succeeded ", i)
continue
}
if _, ok := err.(cbcError); !ok {
t.Errorf("corrupt byte %d: got %v (%T), want cbcError", i, err, err)
continue
}
after := fresh.Len()
bytesRead := before - after
if bytesRead < maxPacket {
t.Errorf("corrupt byte %d: read %d bytes, want more than %d", i, bytesRead, maxPacket)
continue
}
if i > 0 && bytesRead != lastRead {
t.Errorf("corrupt byte %d: read %d bytes, want %d bytes read", i, bytesRead, lastRead)
}
lastRead = bytesRead
}
}
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