forked from TrueCloudLab/neoneo-go
89 lines
1.9 KiB
Go
89 lines
1.9 KiB
Go
package keys
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import (
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"bytes"
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"fmt"
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"github.com/nspcc-dev/neo-go/pkg/encoding/base58"
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"github.com/nspcc-dev/neo-go/pkg/util/slice"
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)
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const (
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// WIFVersion is the version used to decode and encode WIF keys.
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WIFVersion = 0x80
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)
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// WIF represents a wallet import format.
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type WIF struct {
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// Version of the wallet import format. Default to 0x80.
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Version byte
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// Bool to determine if the WIF is compressed or not.
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Compressed bool
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// A reference to the PrivateKey which this WIF is created from.
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PrivateKey *PrivateKey
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// A string representation of the WIF.
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S string
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}
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// WIFEncode encodes the given private key into a WIF string.
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func WIFEncode(key []byte, version byte, compressed bool) (s string, err error) {
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if version == 0x00 {
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version = WIFVersion
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}
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if len(key) != 32 {
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return s, fmt.Errorf("invalid private key length: %d", len(key))
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}
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buf := new(bytes.Buffer)
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buf.WriteByte(version)
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buf.Write(key)
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if compressed {
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buf.WriteByte(0x01)
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}
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s = base58.CheckEncode(buf.Bytes())
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return
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}
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// WIFDecode decodes the given WIF string into a WIF struct.
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func WIFDecode(wif string, version byte) (*WIF, error) {
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b, err := base58.CheckDecode(wif)
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if err != nil {
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return nil, err
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}
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defer slice.Clean(b)
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if version == 0x00 {
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version = WIFVersion
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}
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w := &WIF{
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Version: version,
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S: wif,
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}
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switch len(b) {
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case 33: // OK, uncompressed public key.
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case 34: // OK, compressed public key.
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// Check the compression flag.
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if b[33] != 0x01 {
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return nil, fmt.Errorf("invalid compression flag %d expecting %d", b[33], 0x01)
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}
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w.Compressed = true
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default:
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return nil, fmt.Errorf("invalid WIF length %d, expecting 33 or 34", len(b))
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}
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if b[0] != version {
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return nil, fmt.Errorf("invalid WIF version got %d, expected %d", b[0], version)
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}
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// Derive the PrivateKey.
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w.PrivateKey, err = NewPrivateKeyFromBytes(b[1:33])
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if err != nil {
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return nil, err
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}
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return w, nil
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}
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