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Remove unnecessary methods and add missing tests.

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This commit is contained in:
Mariano Cano 2021-02-01 14:16:08 -08:00
parent 51ac28656e
commit a74fc7a0b2
2 changed files with 77 additions and 94 deletions
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108
kms/uri/uri.go
View file

@ -90,24 +90,30 @@ func (u *URI) Get(key string) string {
if v == "" {
v = u.URL.Query().Get(key)
}
return StringDecode(v)
return v
}
// GetHex returns the first value in the uri with the give n key, it will return
// empty nil if that field is not present.
func (u *URI) GetHex(key string) ([]byte, error) {
v := u.Values.Get(key)
// GetEncoded returns the first value in the uri with the give n key, it will
// return empty nil if that field is not present or is empty. If the return
// value is hex encoded it will decode it and return it.
func (u *URI) GetEncoded(key string) []byte {
v := u.Get(key)
if v == "" {
v = u.URL.Query().Get(key)
return nil
}
return HexDecode(v)
if len(v)%2 == 0 {
if b, err := hex.DecodeString(v); err == nil {
return b
}
}
return []byte(v)
}
// Pin returns the pin encoded in the url. It will read the pin from the
// pin-value or the pin-source attributes.
func (u *URI) Pin() string {
if value := u.Get("pin-value"); value != "" {
return StringDecode(value)
return value
}
if path := u.Get("pin-source"); path != "" {
if b, err := readFile(path); err == nil {
@ -128,89 +134,3 @@ func readFile(path string) ([]byte, error) {
}
return b, nil
}
// PercentEncode encodes the given bytes using the percent encoding described in
// RFC3986 (https://tools.ietf.org/html/rfc3986).
func PercentEncode(b []byte) string {
buf := new(strings.Builder)
for _, v := range b {
buf.WriteString("%" + hex.EncodeToString([]byte{v}))
}
return buf.String()
}
// PercentDecode decodes the given string using the percent encoding described
// in RFC3986 (https://tools.ietf.org/html/rfc3986).
func PercentDecode(s string) ([]byte, error) {
if len(s)%3 != 0 {
return nil, errors.Errorf("error parsing %s: wrong length", s)
}
var first string
buf := new(bytes.Buffer)
for i, r := range s {
mod := i % 3
rr := string(r)
switch mod {
case 0:
if r != '%' {
return nil, errors.Errorf("error parsing %s: expected %% and found %s in position %d", s, rr, i)
}
case 1:
if !isHex(r) {
return nil, errors.Errorf("error parsing %s: %s in position %d is not an hexadecimal number", s, rr, i)
}
first = string(r)
case 2:
if !isHex(r) {
return nil, errors.Errorf("error parsing %s: %s in position %d is not an hexadecimal number", s, rr, i)
}
b, err := hex.DecodeString(first + rr)
if err != nil {
return nil, errors.Wrapf(err, "error parsing %s", s)
}
buf.Write(b)
}
}
return buf.Bytes(), nil
}
// StringDecode returns the string given, but it will use Percent-Encoding if
// the string is percent encoded.
func StringDecode(s string) string {
if strings.HasPrefix(s, "%") {
if b, err := PercentDecode(s); err == nil {
return string(b)
}
}
return s
}
// HexDecode deocdes the string s using Percent-Encoding or regular hex
// encoding.
func HexDecode(s string) ([]byte, error) {
if s == "" {
return nil, nil
} else if strings.HasPrefix(s, "%") {
return PercentDecode(s)
}
b, err := hex.DecodeString(s)
if err != nil {
return nil, errors.Wrapf(err, "error parsing %s", s)
}
return b, nil
}
func isHex(r rune) bool {
switch {
case r >= '0' && r <= '9':
return true
case r >= 'a' && r <= 'f':
return true
case r >= 'A' && r <= 'F':
return true
default:
return false
}
}

63
kms/uri/uri_test.go
View file

@ -201,3 +201,66 @@ func TestURI_Get(t *testing.T) {
})
}
}
func TestURI_GetEncoded(t *testing.T) {
mustParse := func(s string) *URI {
u, err := Parse(s)
if err != nil {
t.Fatal(err)
}
return u
}
type args struct {
key string
}
tests := []struct {
name string
uri *URI
args args
want []byte
}{
{"ok", mustParse("yubikey:slot-id=9a"), args{"slot-id"}, []byte{0x9a}},
{"ok first", mustParse("yubikey:slot-id=9a9b;slot-id=9b"), args{"slot-id"}, []byte{0x9a, 0x9b}},
{"ok percent", mustParse("yubikey:slot-id=9a;foo=%9a%9b%9c"), args{"foo"}, []byte{0x9a, 0x9b, 0x9c}},
{"ok in query", mustParse("yubikey:slot-id=9a?foo=9a"), args{"foo"}, []byte{0x9a}},
{"ok in query percent", mustParse("yubikey:slot-id=9a?foo=%9a"), args{"foo"}, []byte{0x9a}},
{"ok missing", mustParse("yubikey:slot-id=9a"), args{"foo"}, nil},
{"ok missing query", mustParse("yubikey:slot-id=9a?bar=zar"), args{"foo"}, nil},
{"ok no hex", mustParse("yubikey:slot-id=09a?bar=zar"), args{"slot-id"}, []byte{'0', '9', 'a'}},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := tt.uri.GetEncoded(tt.args.key)
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("URI.GetEncoded() = %v, want %v", got, tt.want)
}
})
}
}
func TestURI_Pin(t *testing.T) {
mustParse := func(s string) *URI {
u, err := Parse(s)
if err != nil {
t.Fatal(err)
}
return u
}
tests := []struct {
name string
uri *URI
want string
}{
{"from value", mustParse("pkcs11:id=%72%73?pin-value=0123456789"), "0123456789"},
{"from source", mustParse("pkcs11:id=%72%73?pin-source=testdata/pin.txt"), "trim-this-pin"},
{"from missing", mustParse("pkcs11:id=%72%73"), ""},
{"from source missing", mustParse("pkcs11:id=%72%73?pin-source=testdata/foo.txt"), ""},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := tt.uri.Pin(); got != tt.want {
t.Errorf("URI.Pin() = %v, want %v", got, tt.want)
}
})
}
}