74 lines
1.3 KiB
Go
74 lines
1.3 KiB
Go
package apdu
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import (
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"bytes"
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"encoding/binary"
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)
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type Command struct {
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Cla uint8
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Ins uint8
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P1 uint8
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P2 uint8
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Data []byte
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le uint8
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requiresLe bool
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}
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func NewCommand(cla, ins, p1, p2 uint8, data []byte) *Command {
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return &Command{
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Cla: cla,
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Ins: ins,
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P1: p1,
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P2: p2,
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Data: data,
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requiresLe: false,
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}
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}
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func (c *Command) SetLe(le uint8) {
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c.requiresLe = true
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c.le = le
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}
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func (c *Command) Le() (bool, uint8) {
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return c.requiresLe, c.le
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}
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func (c *Command) Serialize() ([]byte, error) {
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buf := new(bytes.Buffer)
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if err := binary.Write(buf, binary.BigEndian, c.Cla); err != nil {
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return nil, err
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}
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if err := binary.Write(buf, binary.BigEndian, c.Ins); err != nil {
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return nil, err
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}
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if err := binary.Write(buf, binary.BigEndian, c.P1); err != nil {
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return nil, err
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}
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if err := binary.Write(buf, binary.BigEndian, c.P2); err != nil {
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return nil, err
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}
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if len(c.Data) > 0 {
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if err := binary.Write(buf, binary.BigEndian, uint8(len(c.Data))); err != nil {
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return nil, err
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}
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if err := binary.Write(buf, binary.BigEndian, c.Data); err != nil {
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return nil, err
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}
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}
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if c.requiresLe {
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if err := binary.Write(buf, binary.BigEndian, c.le); err != nil {
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return nil, err
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}
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}
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return buf.Bytes(), nil
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}
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