list.go

// SPDX-FileCopyrightText: 2018 Joern Barthel <joern.barthel@kreuzwerker.de>
// SPDX-License-Identifier: Apache-2.0

package ykoath

import (
	"fmt"
)

// Name encapsulates the result of the "LIST" instruction
type Name struct {
	Algorithm Algorithm
	Type      Type
	Name      string
}

// String returns a string representation of the algorithm
func (n *Name) String() string {
	return fmt.Sprintf("%s (%s %s)", n.Name, n.Algorithm.String(), n.Type.String())
}

// List sends a "LIST" instruction, return a list of OATH credentials
func (c *Card) List() ([]*Name, error) {
	var names []*Name

	tvs, err := c.send(insList, 0x00, 0x00)
	if err != nil {
		return nil, err
	}

	for _, tv := range tvs {
		switch tv.Tag {
		case tagNameList:
			name := &Name{
				Algorithm: Algorithm(tv.Value[0] & 0x0f),
				Name:      string(tv.Value[1:]),
				Type:      Type(tv.Value[0] & 0xf0),
			}

			names = append(names, name)

		default:
			return nil, fmt.Errorf("%w (%#x)", errUnknownTag, tv.Tag)
		}
	}

	return names, nil
}