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keys/utils.go

@@ -0,0 +1,34 @@
+package keys
+
+import (
+	"errors"
+	"fmt"
+	"math/big"
+
+	"github.com/sonr-io/sonr/crypto/core/curves"
+)
+
+// getEcdsaPoint builds an elliptic curve point from a compressed byte slice
+func getEcdsaPoint(pubKey []byte) (*curves.EcPoint, error) {
+	crv := curves.K256()
+	x := new(big.Int).SetBytes(pubKey[1:33])
+	y := new(big.Int).SetBytes(pubKey[33:])
+	ecCurve, err := crv.ToEllipticCurve()
+	if err != nil {
+		return nil, fmt.Errorf("error converting curve: %v", err)
+	}
+	return &curves.EcPoint{X: x, Y: y, Curve: ecCurve}, nil
+}
+
+// DeserializeSecp256k1Signature deserializes an ECDSA signature from a byte slice
+func deserializeSignature(sigBytes []byte) (*curves.EcdsaSignature, error) {
+	if len(sigBytes) != 66 {
+		return nil, errors.New("malformed signature: not the correct size")
+	}
+	sig := &curves.EcdsaSignature{
+		V: int(sigBytes[0]),
+		R: new(big.Int).SetBytes(sigBytes[1:33]),
+		S: new(big.Int).SetBytes(sigBytes[33:66]),
+	}
+	return sig, nil
+}