tlv

package

v0.5.2 Latest Latest Go to latest Published: Jan 14, 2024 License: Apache-2.0 Imports: 5 Imported by: 3

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Repository

github.com/cunicu/go-iso7816

Links

Open Source Insights

Documentation ¶

Overview ¶

Package tlv implements various version (ASN.1 BER, Simple, Compact) TLV encoding using in ISO 7816-4.

Index ¶

Variables
func EncodeBER(tvs ...TagValue) (buf []byte, err error)
func EncodeCompact(tvs ...TagValue) (buf []byte, err error)
func EncodeLengthBER(l int) ([]byte, error)
func EncodeSimple(tvs ...TagValue) (buf []byte, err error)
type Class
type Tag
type TagValue
- func New(t Tag, values ...any) (tv TagValue)
type TagValues

Constants ¶

This section is empty.

Variables ¶

View Source

var (
	ErrInvalidTag   = errors.New("invalid tag")
	ErrTagToBig     = errors.New("tag is too big for this encoding")
	ErrValueToLarge = errors.New("valye to large for this encoding")
)

View Source

var ErrNotConstructed = errors.New("tag is not constructed but contains children")

Functions ¶

func EncodeBER ¶

func EncodeBER(tvs ...TagValue) (buf []byte, err error)

func EncodeCompact ¶

func EncodeCompact(tvs ...TagValue) (buf []byte, err error)

func EncodeLengthBER ¶ added in v0.4.0

func EncodeLengthBER(l int) ([]byte, error)

func EncodeSimple ¶

func EncodeSimple(tvs ...TagValue) (buf []byte, err error)

Types ¶

type Class ¶

type Class byte

const (
	ClassUniversal   Class = 0b00
	ClassApplication Class = 0b01
	ClassContext     Class = 0b10
	ClassPrivate     Class = 0b11
)

type Tag ¶

type Tag uint // In theory ISO 7816-4 also supports 3-byte tags

func (Tag) Class ¶

func (t Tag) Class() Class

func (Tag) IsConstructed ¶

func (t Tag) IsConstructed() bool

func (Tag) MarshalBER ¶ added in v0.3.0

func (t Tag) MarshalBER() (buf []byte, err error)

func (*Tag) UnmarshalBER ¶ added in v0.3.0

func (t *Tag) UnmarshalBER(buf []byte) (rBuf []byte, err error)

UnmarshalBER decodes an ASN.1 BER-TLV encoded tag field. See: ISO 7816-4 Section 5.2.2.1 BER-TLV tag fields

type TagValue ¶

type TagValue struct {
	Tag        Tag
	Value      []byte
	Children   TagValues
	SkipLength bool
}

func New ¶

func New(t Tag, values ...any) (tv TagValue)

func (*TagValue) Append ¶ added in v0.4.0

func (tv *TagValue) Append(value any)

func (TagValue) Equal ¶ added in v0.2.0

func (tv TagValue) Equal(w TagValue) bool

func (TagValue) MarshalBER ¶

func (tv TagValue) MarshalBER() (buf []byte, err error)

MarshalBER encodes an ASN.1 BER-TLV encoded tag field. See: ISO 7816-4 Section 5.2.2.1 BER-TLV tag fields

func (*TagValue) UnmarshalBER ¶

func (tv *TagValue) UnmarshalBER(buf []byte) ([]byte, error)

type TagValues ¶ added in v0.2.0

type TagValues []TagValue

func DecodeBER ¶

func DecodeBER(buf []byte) (tvs TagValues, err error)

func DecodeCompact ¶

func DecodeCompact(buf []byte) (tvs TagValues, err error)

func DecodeSimple ¶

func DecodeSimple(buf []byte) (tvs TagValues, err error)

func (*TagValues) DeleteAll ¶ added in v0.2.0

func (tvs *TagValues) DeleteAll(tag Tag) (removed int)

func (TagValues) Equal ¶ added in v0.2.0

func (tvs TagValues) Equal(w TagValues) bool

func (TagValues) Get ¶ added in v0.2.0

func (tvs TagValues) Get(tag Tag) ([]byte, TagValues, bool)

func (*TagValues) GetAll ¶ added in v0.2.0

func (tvs *TagValues) GetAll(tag Tag) (s TagValues)

func (TagValues) GetChild ¶ added in v0.2.0

func (tvs TagValues) GetChild(tag Tag, subs ...Tag) ([]byte, TagValues, bool)

func (*TagValues) Pop ¶ added in v0.2.0

func (tvs *TagValues) Pop(tag Tag) (TagValue, bool)

func (*TagValues) PopAll ¶ added in v0.2.0

func (tvs *TagValues) PopAll(tag Tag) (s TagValues)

func (*TagValues) Put ¶ added in v0.2.0

func (tvs *TagValues) Put(tv TagValue)

Source Files ¶

View all Source files

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