forked from TrueCloudLab/certificates
63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
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package pkcs7
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import (
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"bytes"
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"encoding/asn1"
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"strings"
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"testing"
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)
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func TestBer2Der(t *testing.T) {
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// indefinite length fixture
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ber := []byte{0x30, 0x80, 0x02, 0x01, 0x01, 0x00, 0x00}
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expected := []byte{0x30, 0x03, 0x02, 0x01, 0x01}
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der, err := ber2der(ber)
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if err != nil {
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t.Fatalf("ber2der failed with error: %v", err)
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}
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if !bytes.Equal(der, expected) {
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t.Errorf("ber2der result did not match.\n\tExpected: % X\n\tActual: % X", expected, der)
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}
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if der2, err := ber2der(der); err != nil {
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t.Errorf("ber2der on DER bytes failed with error: %v", err)
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} else {
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if !bytes.Equal(der, der2) {
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t.Error("ber2der is not idempotent")
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}
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}
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var thing struct {
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Number int
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}
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rest, err := asn1.Unmarshal(der, &thing)
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if err != nil {
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t.Errorf("Cannot parse resulting DER because: %v", err)
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} else if len(rest) > 0 {
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t.Errorf("Resulting DER has trailing data: % X", rest)
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}
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}
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func TestBer2Der_Negatives(t *testing.T) {
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fixtures := []struct {
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Input []byte
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ErrorContains string
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}{
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{[]byte{0x30, 0x85}, "tag length too long"},
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{[]byte{0x30, 0x84, 0x80, 0x0, 0x0, 0x0}, "length is negative"},
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{[]byte{0x30, 0x82, 0x0, 0x1}, "length has leading zero"},
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{[]byte{0x30, 0x80, 0x1, 0x2}, "Invalid BER format"},
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{[]byte{0x30, 0x03, 0x01, 0x02}, "length is more than available data"},
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{[]byte{0x30}, "end of ber data reached"},
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}
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for _, fixture := range fixtures {
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_, err := ber2der(fixture.Input)
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if err == nil {
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t.Errorf("No error thrown. Expected: %s", fixture.ErrorContains)
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}
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if !strings.Contains(err.Error(), fixture.ErrorContains) {
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t.Errorf("Unexpected error thrown.\n\tExpected: /%s/\n\tActual: %s", fixture.ErrorContains, err.Error())
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}
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}
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}
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