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tarsum: allow for alternate block ciphers

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Not breaking the default cipher and algorithm for calculating checksums,
but allow for using alternate block ciphers during the checksum
calculation.

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)
This commit is contained in:
Vincent Batts 2014-05-15 16:50:58 -04:00
parent ff8c7b20ac
commit dd62962c4d
2 changed files with 117 additions and 29 deletions
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46
tarsum/tarsum_test.go
View file

@ -3,8 +3,11 @@ package tarsum
import (
"bytes"
"compress/gzip"
"crypto/md5"
"crypto/rand"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"encoding/hex"
"fmt"
"io"
@ -22,6 +25,7 @@ type testLayer struct {
gzip bool
tarsum string
version Version
hash THash
}
var testLayers = []testLayer{
@ -75,6 +79,31 @@ var testLayers = []testLayer{
// this tar has newer of collider-1.tar, ensuring is has different hash
filename: "testdata/collision/collision-3.tar",
tarsum: "tarsum+sha256:f886e431c08143164a676805205979cd8fa535dfcef714db5515650eea5a7c0f"},
{
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
tarsum: "tarsum+md5:0d7529ec7a8360155b48134b8e599f53",
hash: md5THash,
},
{
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
tarsum: "tarsum+sha1:f1fee39c5925807ff75ef1925e7a23be444ba4df",
hash: sha1Hash,
},
{
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
tarsum: "tarsum+sha224:6319390c0b061d639085d8748b14cd55f697cf9313805218b21cf61c",
hash: sha224Hash,
},
{
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
tarsum: "tarsum+sha384:a578ce3ce29a2ae03b8ed7c26f47d0f75b4fc849557c62454be4b5ffd66ba021e713b48ce71e947b43aab57afd5a7636",
hash: sha384Hash,
},
{
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
tarsum: "tarsum+sha512:e9bfb90ca5a4dfc93c46ee061a5cf9837de6d2fdf82544d6460d3147290aecfabf7b5e415b9b6e72db9b8941f149d5d69fb17a394cbfaf2eac523bd9eae21855",
hash: sha512Hash,
},
}
type sizedOptions struct {
@ -203,6 +232,14 @@ func TestEmptyTar(t *testing.T) {
}
}
var (
md5THash = NewTHash("md5", md5.New)
sha1Hash = NewTHash("sha1", sha1.New)
sha224Hash = NewTHash("sha224", sha256.New224)
sha384Hash = NewTHash("sha384", sha512.New384)
sha512Hash = NewTHash("sha512", sha512.New)
)
func TestTarSums(t *testing.T) {
for _, layer := range testLayers {
var (
@ -226,8 +263,13 @@ func TestTarSums(t *testing.T) {
defer file.Close()
}
// double negatives!
ts, err := NewTarSum(fh, !layer.gzip, layer.version)
var ts TarSum
if layer.hash == nil {
// double negatives!
ts, err = NewTarSum(fh, !layer.gzip, layer.version)
} else {
ts, err = NewTarSumHash(fh, !layer.gzip, layer.version, layer.hash)
}
if err != nil {
t.Errorf("%q :: %q", err, layer.filename)
continue