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-rw-r--r--identity/key.go187
1 files changed, 181 insertions, 6 deletions
diff --git a/identity/key.go b/identity/key.go
index cc948394..8dd5e8c1 100644
--- a/identity/key.go
+++ b/identity/key.go
@@ -1,18 +1,193 @@
package identity
+import (
+ "bytes"
+ "encoding/json"
+ "fmt"
+ "io"
+ "strings"
+ "time"
+
+ "github.com/pkg/errors"
+ "golang.org/x/crypto/openpgp"
+ "golang.org/x/crypto/openpgp/armor"
+ "golang.org/x/crypto/openpgp/packet"
+
+ "github.com/MichaelMure/git-bug/repository"
+)
+
type Key struct {
- // The GPG fingerprint of the key
- Fingerprint string `json:"fingerprint"`
- PubKey string `json:"pub_key"`
+ public *packet.PublicKey
+ private *packet.PrivateKey
+}
+
+// GenerateKey generate a keypair (public+private)
+func GenerateKey() *Key {
+ entity, err := openpgp.NewEntity("", "", "", &packet.Config{
+ // The armored format doesn't include the creation time, which makes the round-trip data not being fully equal.
+ // We don't care about the creation time so we can set it to the zero value.
+ Time: func() time.Time {
+ return time.Time{}
+ },
+ })
+ if err != nil {
+ panic(err)
+ }
+ return &Key{
+ public: entity.PrimaryKey,
+ private: entity.PrivateKey,
+ }
+}
+
+// generatePublicKey generate only a public key (only useful for testing)
+// See GenerateKey for the details.
+func generatePublicKey() *Key {
+ k := GenerateKey()
+ k.private = nil
+ return k
+}
+
+func (k *Key) MarshalJSON() ([]byte, error) {
+ var buf bytes.Buffer
+ w, err := armor.Encode(&buf, openpgp.PublicKeyType, nil)
+ if err != nil {
+ return nil, err
+ }
+ err = k.public.Serialize(w)
+ if err != nil {
+ return nil, err
+ }
+ err = w.Close()
+ if err != nil {
+ return nil, err
+ }
+ return json.Marshal(buf.String())
+}
+
+func (k *Key) UnmarshalJSON(data []byte) error {
+ var armored string
+ err := json.Unmarshal(data, &armored)
+ if err != nil {
+ return err
+ }
+
+ block, err := armor.Decode(strings.NewReader(armored))
+ if err == io.EOF {
+ return fmt.Errorf("no armored data found")
+ }
+ if err != nil {
+ return err
+ }
+
+ if block.Type != openpgp.PublicKeyType {
+ return fmt.Errorf("invalid key type")
+ }
+
+ reader := packet.NewReader(block.Body)
+ p, err := reader.Next()
+ if err != nil {
+ return errors.Wrap(err, "failed to read public key packet")
+ }
+
+ public, ok := p.(*packet.PublicKey)
+ if !ok {
+ return errors.New("got no packet.publicKey")
+ }
+
+ // The armored format doesn't include the creation time, which makes the round-trip data not being fully equal.
+ // We don't care about the creation time so we can set it to the zero value.
+ public.CreationTime = time.Time{}
+
+ k.public = public
+ return nil
}
func (k *Key) Validate() error {
- // Todo
+ if k.public == nil {
+ return fmt.Errorf("nil public key")
+ }
+ if !k.public.CanSign() {
+ return fmt.Errorf("public key can't sign")
+ }
+
+ if k.private != nil {
+ if !k.private.CanSign() {
+ return fmt.Errorf("private key can't sign")
+ }
+ }
return nil
}
func (k *Key) Clone() *Key {
- clone := *k
- return &clone
+ clone := &Key{}
+
+ pub := *k.public
+ clone.public = &pub
+
+ if k.private != nil {
+ priv := *k.private
+ clone.private = &priv
+ }
+
+ return clone
+}
+
+func (k *Key) EnsurePrivateKey(repo repository.RepoKeyring) error {
+ if k.private != nil {
+ return nil
+ }
+
+ // item, err := repo.Keyring().Get(k.Fingerprint())
+ // if err != nil {
+ // return fmt.Errorf("no private key found for %s", k.Fingerprint())
+ // }
+ //
+
+ panic("TODO")
+}
+
+func (k *Key) Fingerprint() string {
+ return string(k.public.Fingerprint[:])
+}
+
+func (k *Key) PGPEntity() *openpgp.Entity {
+ return &openpgp.Entity{
+ PrimaryKey: k.public,
+ PrivateKey: k.private,
+ }
+}
+
+var _ openpgp.KeyRing = &PGPKeyring{}
+
+// PGPKeyring implement a openpgp.KeyRing from an slice of Key
+type PGPKeyring []*Key
+
+func (pk PGPKeyring) KeysById(id uint64) []openpgp.Key {
+ var result []openpgp.Key
+ for _, key := range pk {
+ if key.public.KeyId == id {
+ result = append(result, openpgp.Key{
+ PublicKey: key.public,
+ PrivateKey: key.private,
+ })
+ }
+ }
+ return result
+}
+
+func (pk PGPKeyring) KeysByIdUsage(id uint64, requiredUsage byte) []openpgp.Key {
+ // the only usage we care about is the ability to sign, which all keys should already be capable of
+ return pk.KeysById(id)
+}
+
+func (pk PGPKeyring) DecryptionKeys() []openpgp.Key {
+ result := make([]openpgp.Key, len(pk))
+ for i, key := range pk {
+ result[i] = openpgp.Key{
+ PublicKey: key.public,
+ PrivateKey: key.private,
+ }
+ }
+ return result
}