How to use Decode method of kd Package

Best Syzkaller code snippet using kd.Decode

signature.go

Source:signature.go

...74	return strings.Join([]string{scheme, sigdata, derv}, ":"), nil75}76//we define a compact, simple encoding for the protbuf signature before our SDK for other language is mature...77//which has such a form: <crypto scheme mark>:<encoded sig>:[derived part := <index>,<finger print>,[cc]]78func DecodeCompactSignature(sig string) (*protos.Signature, error) {79	sigparts := strings.Split(sig, ":")80	if len(sigparts) != 3 {81		return nil, fmt.Errorf("Invalid encoding for sig")82	}83	ret := &protos.Signature{}84	switch sigparts[0] {85	case "EC":86		sigec, err := decodeECDSASig(sigparts[1])87		if err != nil {88			return nil, fmt.Errorf("Decode ecdsa sig fail: %s", err)89		}90		ret.Data = &protos.Signature_Ec{sigec}91	default:92		return nil, fmt.Errorf("Unknown sig scheme: %s", sigparts[0])93	}94	if len(sigparts[2]) != 0 {95		dervParts := strings.Split(sigparts[2], ",")96		if len(dervParts) < 2 {97			return nil, fmt.Errorf("Invalid encoding for key derived data")98		}99		ret.Kd = new(protos.KeyDerived)100		if ind, ok := big.NewInt(0).SetString(dervParts[0], 10); !ok {101			return nil, fmt.Errorf("Decode key derived index fail")102		} else {103			ret.Kd.Index = ind.Bytes()104		}105		if _, err := fmt.Sscanf(dervParts[1], "%x", &ret.Kd.RootFingerprint); err != nil {106			return nil, fmt.Errorf("Decode key derived root fp fail: %s", err)107		}108		if len(dervParts) > 2 {109			if _, err := fmt.Sscanf(dervParts[2], "%x", &ret.Kd.Chaincode); err != nil {110				return nil, fmt.Errorf("Decode key derived root fp fail: %s", err)111			}112		}113	}114	return ret, nil115}...

decoder.go

Source:decoder.go

...3	"github.com/pkg/errors"4	"github.com/spikeekips/mitum/util/encoder"5	"github.com/spikeekips/mitum/util/hint"6)7// KeyDecoder is basic unmarshaler for Keys. It can unmarshal Privatekey and8// publickey.9type KeyDecoder struct {10	ty hint.Type11	b  []byte12}13// Encode is used with encoder.Encoder.14// var de struct {15// 	Key KeyDecoder16// }17//18// err := json.Unmarshal(b, &de)19// if err != nil {20// 	return err21// }22//23// enc := jsonenc.NewEncoder()24// uk, err := de.Key.Encode(enc)25// if err != nil {26// 	return err27// }28//29// priv, ok := uk.(Privtekey)30// pub, ok := uk.(Publickey)31func (kd *KeyDecoder) Encode(enc encoder.Encoder) (Key, error) {32	if len(kd.b) < 1 {33		return nil, nil34	}35	return decodeKey(kd.b, kd.ty, enc)36}37func (kd KeyDecoder) Type() hint.Type {38	return kd.ty39}40func (kd KeyDecoder) Body() []byte {41	return kd.b42}43// PrivatekeyDecoder is basic unmarshaler for Privatekey.44type PrivatekeyDecoder struct {45	KeyDecoder46}47func (kd *PrivatekeyDecoder) Encode(enc encoder.Encoder) (Privatekey, error) {48	k, err := kd.KeyDecoder.Encode(enc)49	switch {50	case err != nil:51		return nil, err52	case k == nil:53		return nil, nil54	}55	priv, ok := k.(Privatekey)56	if !ok {57		return nil, errors.Errorf("not Privatekey: %T", k)58	}59	return priv, nil60}61// PublickeyDecoder is basic unmarshaler for Privatekey.62type PublickeyDecoder struct {63	KeyDecoder64}65func (kd *PublickeyDecoder) Encode(enc encoder.Encoder) (Publickey, error) {66	k, err := kd.KeyDecoder.Encode(enc)67	switch {68	case err != nil:69		return nil, err70	case k == nil:71		return nil, nil72	}73	pub, ok := k.(Publickey)74	if !ok {75		return nil, errors.Errorf("not Publickey: %T", k)76	}77	return pub, nil78}79// DecodeKeyFromString parses and decodes Key from string.80func DecodeKeyFromString(s string, enc encoder.Encoder) (Key, error) {81	if len(s) < 1 {82		return nil, nil83	}84	p, ty, err := hint.ParseFixedTypedString(s, KeyTypeSize)85	if err != nil {86		return nil, errors.Wrapf(err, "failed to decode key, %q", s)87	}88	return decodeKey([]byte(p), ty, enc)89}90func DecodePrivatekeyFromString(s string, enc encoder.Encoder) (Privatekey, error) {91	k, err := DecodeKeyFromString(s, enc)92	switch {93	case err != nil:94		return nil, errors.Wrapf(err, "failed to decode privatekey, %q", s)95	case k == nil:96		return nil, nil97	}98	priv, ok := k.(Privatekey)99	if !ok {100		return nil, errors.Errorf("not privatekey: %T", k)101	}102	return priv, nil103}104func DecodePublickeyFromString(s string, enc encoder.Encoder) (Publickey, error) {105	k, err := DecodeKeyFromString(s, enc)106	switch {107	case err != nil:108		return nil, errors.Wrapf(err, "failed to decode publickey, %q", s)109	case k == nil:110		return nil, nil111	}112	pub, ok := k.(Publickey)113	if !ok {114		return nil, errors.Errorf("not publickey: %T", k)115	}116	return pub, nil117}118func decodeKey(b []byte, ty hint.Type, enc encoder.Encoder) (Key, error) {119	var k Key120	err := encoder.DecodeWithHint(b, enc, hint.NewHint(ty, ""), &k)121	return k, err122}...

key_test.go

Source:key_test.go

...3	"testing"4	"github.com/affix-io/affix/auth/key"5	testkeys "github.com/affix-io/affix/auth/key/test"6)7func TestKeyDecodeID(t *testing.T) {8	kd0 := testkeys.GetKeyData(0)9	id, err := key.DecodeID(kd0.EncodedPeerID)10	if err != nil {11		t.Fatal(err)12	}13	if kd0.EncodedPeerID != id.String() {14		t.Errorf("string mistmatch want: %q got: %q", kd0.EncodedPeerID, id.String())15	}16}17func TestIDFromPriv(t *testing.T) {18	kd := testkeys.GetKeyData(0)19	expect := kd.KeyID.String()20	got, err := key.IDFromPrivKey(kd.PrivKey)21	if err != nil {22		t.Error(err)23	}24	if expect != got {25		t.Errorf("ID mismatch. expected: '%s', got: '%s'", expect, got)26	}27}28func TestIDFromPub(t *testing.T) {29	if _, err := key.IDFromPubKey(nil); err == nil {30		t.Errorf("expected error calculating the ID of nil")31	}32	kd := testkeys.GetKeyData(1)33	expect := kd.KeyID.String()34	got, err := key.IDFromPubKey(kd.PrivKey.GetPublic())35	if err != nil {36		t.Error(err)37	}38	if expect != got {39		t.Errorf("ID mismatch. expected: '%s', got: '%s'", expect, got)40	}41}42func TestPubKeyB64Coding(t *testing.T) {43	kd := testkeys.GetKeyData(0)44	str, err := key.EncodePubKeyB64(kd.PrivKey.GetPublic())45	if err != nil {46		t.Fatal(err)47	}48	got, err := key.DecodeB64PubKey(str)49	if err != nil {50		t.Fatal(err)51	}52	if !got.Equals(kd.PrivKey.GetPublic()) {53		t.Errorf("public key mismatch")54	}55	if _, err := key.EncodePubKeyB64(nil); err == nil {56		t.Error("expected encoding nil key to error. got nil.")57	}58	if _, err := key.DecodeB64PubKey("ð"); err == nil {59		t.Error("expected decoding bad key to error. got nil.")60	}61}62func TestB64PrivKeyCoding(t *testing.T) {63	key1 := testkeys.GetKeyData(0)64	pkstr, err := key.EncodePrivKeyB64(key1.PrivKey)65	if err != nil {66		t.Fatal(err)67	}68	got, err := key.DecodeB64PrivKey(pkstr)69	if err != nil {70		t.Fatal(err)71	}72	if !got.Equals(key1.PrivKey) {73		t.Errorf("private key mismatch")74	}75	if _, err := key.EncodePrivKeyB64(nil); err == nil {76		t.Error("expected encoding nil key to error. got nil.")77	}78	if _, err := key.DecodeB64PrivKey("ð"); err == nil {79		t.Error("expected decoding bad key to error. got nil.")80	}81}...

Decode

Using AI Code Generation

1import (2type kd struct {3}4func main() {5	s := `[{"First":"James","Last":"Bond","Age":20},{"First":"Miss","Last":"Moneypenny","Age":19}]`6	bs := []byte(s)7	fmt.Printf("%T\n",s)8	fmt.Printf("%T\n",bs)9	err := json.Unmarshal(bs,&people)10	if err != nil {11		fmt.Println(err)12	}13	fmt.Println("all of the data",people)14	for i,v := range people {15		fmt.Println("\nPerson number",i)16		fmt.Println(v.First,v.Last,v.Age)17	}18}

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