open-vault/builtin/credential/aws/pkcs7/ber_test.go

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package pkcs7
import (
"bytes"
"encoding/asn1"
"encoding/pem"
"fmt"
"strings"
"testing"
)
func TestBer2Der(t *testing.T) {
// indefinite length fixture
ber := []byte{0x30, 0x80, 0x02, 0x01, 0x01, 0x00, 0x00}
expected := []byte{0x30, 0x03, 0x02, 0x01, 0x01}
der, err := ber2der(ber)
if err != nil {
t.Fatalf("ber2der failed with error: %v", err)
}
if !bytes.Equal(der, expected) {
t.Errorf("ber2der result did not match.\n\tExpected: % X\n\tActual: % X", expected, der)
}
if der2, err := ber2der(der); err != nil {
t.Errorf("ber2der on DER bytes failed with error: %v", err)
} else {
if !bytes.Equal(der, der2) {
t.Error("ber2der is not idempotent")
}
}
var thing struct {
Number int
}
rest, err := asn1.Unmarshal(der, &thing)
if err != nil {
t.Errorf("Cannot parse resulting DER because: %v", err)
} else if len(rest) > 0 {
t.Errorf("Resulting DER has trailing data: % X", rest)
}
}
func TestBer2Der_Negatives(t *testing.T) {
fixtures := []struct {
Input []byte
ErrorContains string
}{
{[]byte{0x30, 0x85}, "tag length too long"},
{[]byte{0x30, 0x84, 0x80, 0x0, 0x0, 0x0}, "length is negative"},
{[]byte{0x30, 0x82, 0x0, 0x1}, "length has leading zero"},
{[]byte{0x30, 0x80, 0x1, 0x2, 0x1, 0x2}, "Invalid BER format"},
{[]byte{0x30, 0x80, 0x1, 0x2}, "BER tag length is more than available data"},
{[]byte{0x30, 0x03, 0x01, 0x02}, "length is more than available data"},
{[]byte{0x30}, "end of ber data reached"},
}
for _, fixture := range fixtures {
_, err := ber2der(fixture.Input)
if err == nil {
t.Errorf("No error thrown. Expected: %s", fixture.ErrorContains)
}
if !strings.Contains(err.Error(), fixture.ErrorContains) {
t.Errorf("Unexpected error thrown.\n\tExpected: /%s/\n\tActual: %s", fixture.ErrorContains, err.Error())
}
}
}
func TestVerifyIndefiniteLengthBer(t *testing.T) {
decoded := mustDecodePEM([]byte(testPKCS7))
_, err := ber2der(decoded)
if err != nil {
t.Errorf("cannot parse indefinite length ber: %v", err)
}
}
func mustDecodePEM(data []byte) []byte {
var block *pem.Block
block, rest := pem.Decode(data)
if len(rest) != 0 {
panic(fmt.Errorf("unexpected remaining PEM block during decode"))
}
return block.Bytes
}
const testPKCS7 = `
-----BEGIN PKCS7-----
MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0B
BwGggCSABIIDfXsiQWdlbnRBY3Rpb25PdmVycmlkZXMiOnsiQWdlbnRPdmVycmlk
ZXMiOnsiRmlsZUV4aXN0c0JlaGF2aW9yIjoiT1ZFUldSSVRFIn19LCJBcHBsaWNh
dGlvbklkIjoiZTA0NDIzZTQtN2E2Ny00ZjljLWIyOTEtOTllNjNjMWMyMTU4Iiwi
QXBwbGljYXRpb25OYW1lIjoibWthbmlhLXhyZF9zYW0uY2R3c19lY2hvc2VydmVy
IiwiRGVwbG95bWVudENyZWF0b3IiOiJ1c2VyIiwiRGVwbG95bWVudEdyb3VwSWQi
OiJmYWI5MjEwZi1mNmM3LTQyODUtYWEyZC03Mzc2MGQ4ODE3NmEiLCJEZXBsb3lt
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dXBJZCI6ImZhYjkyMTBmLWY2YzctNDI4NS1hYTJkLTczNzYwZDg4MTc2YSIsIlJl
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aWEtY2R3cy1kZXBsb3ktYnVja2V0IiwiQnVuZGxlVHlwZSI6InppcCIsIkVUYWci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dboejIcAAAQDAEcwRQIgeqoKXbST17TCEzM1BMWx/jjyVQVBIN3LG17U4OaV364C
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mtRW5hA3+9X6R9yhc5SyXub2xw7KAAABdboejNQAAAQDAEcwRQIgEKIAwwhjUcq2
iwzBAagdy+fTiKnBY1Yjf6wOeRpwXfMCIQC8wM3nxiWrGgIpdzzgDvFhZZTV3N81
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DR7Y2NQ4xDANBglghkgBZQMEAgEFAKCBmDAYBgkqhkiG9w0BCQMxCwYJKoZIhvcN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-----END PKCS7-----
`