1package s3crypto_test
2
3import (
4	"bytes"
5	"fmt"
6	"testing"
7
8	"github.com/aws/aws-sdk-go/service/s3/s3crypto"
9)
10
11func padTest(size int, t *testing.T) {
12	padder := s3crypto.NewPKCS7Padder(size)
13	for i := 0; i < size; i++ {
14		input := make([]byte, i)
15		expected := append(input, bytes.Repeat([]byte{byte(size - i)}, size-i)...)
16		b, err := padder.Pad(input, len(input))
17		if err != nil {
18			t.Fatal("Expected error to be nil but received " + err.Error())
19		}
20		if len(b) != len(expected) {
21			t.Fatal(fmt.Sprintf("Case %d: data is not of the same length", i))
22		}
23		if bytes.Compare(b, expected) != 0 {
24			t.Fatal(fmt.Sprintf("Expected %v but got %v", expected, b))
25		}
26	}
27}
28
29func unpadTest(size int, t *testing.T) {
30	padder := s3crypto.NewPKCS7Padder(size)
31	for i := 0; i < size; i++ {
32		expected := make([]byte, i)
33		input := append(expected, bytes.Repeat([]byte{byte(size - i)}, size-i)...)
34		b, err := padder.Unpad(input)
35		if err != nil {
36			t.Fatal("Error received, was expecting nil: " + err.Error())
37		}
38		if len(b) != len(expected) {
39			t.Fatal(fmt.Sprintf("Case %d: data is not of the same length", i))
40		}
41		if bytes.Compare(b, expected) != 0 {
42			t.Fatal(fmt.Sprintf("Expected %v but got %v", expected, b))
43		}
44	}
45}
46
47func TestPKCS7Padding(t *testing.T) {
48	padTest(10, t)
49	padTest(16, t)
50	padTest(255, t)
51}
52
53func TestPKCS7Unpadding(t *testing.T) {
54	unpadTest(10, t)
55	unpadTest(16, t)
56	unpadTest(255, t)
57}
58