/
full.go
75 lines (60 loc) · 1.42 KB
/
full.go
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package keypair
import (
"bytes"
"github.com/agl/ed25519"
"github.com/digitalbitsorg/go/strkey"
"github.com/digitalbitsorg/go/xdr"
)
type Full struct {
seed string
}
func (kp *Full) Address() string {
return strkey.MustEncode(strkey.VersionByteAccountID, kp.publicKey()[:])
}
func (kp *Full) Hint() (r [4]byte) {
copy(r[:], kp.publicKey()[28:])
return
}
func (kp *Full) Seed() string {
return kp.seed
}
func (kp *Full) Verify(input []byte, sig []byte) error {
if len(sig) != 64 {
return ErrInvalidSignature
}
var asig [64]byte
copy(asig[:], sig[:])
if !ed25519.Verify(kp.publicKey(), input, &asig) {
return ErrInvalidSignature
}
return nil
}
func (kp *Full) Sign(input []byte) ([]byte, error) {
_, priv := kp.keys()
return xdr.Signature(ed25519.Sign(priv, input)[:]), nil
}
func (kp *Full) SignDecorated(input []byte) (xdr.DecoratedSignature, error) {
sig, err := kp.Sign(input)
if err != nil {
return xdr.DecoratedSignature{}, err
}
return xdr.DecoratedSignature{
Hint: xdr.SignatureHint(kp.Hint()),
Signature: xdr.Signature(sig),
}, nil
}
func (kp *Full) publicKey() *[32]byte {
pub, _ := kp.keys()
return pub
}
func (kp *Full) keys() (*[32]byte, *[64]byte) {
reader := bytes.NewReader(kp.rawSeed())
pub, priv, err := ed25519.GenerateKey(reader)
if err != nil {
panic(err)
}
return pub, priv
}
func (kp *Full) rawSeed() []byte {
return strkey.MustDecode(strkey.VersionByteSeed, kp.seed)
}