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diff --git a/vendor/github.com/libp2p/go-libp2p-crypto/ecdsa_test.go b/vendor/github.com/libp2p/go-libp2p-crypto/ecdsa_test.go
new file mode 100644
index 00000000..328b9a7c
--- /dev/null
+++ b/vendor/github.com/libp2p/go-libp2p-crypto/ecdsa_test.go
@@ -0,0 +1,96 @@
+package crypto
+
+import (
+	"crypto/rand"
+	"testing"
+)
+
+func TestECDSABasicSignAndVerify(t *testing.T) {
+	priv, pub, err := GenerateECDSAKeyPair(rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	data := []byte("hello! and welcome to some awesome crypto primitives")
+
+	sig, err := priv.Sign(data)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ok, err := pub.Verify(data, sig)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !ok {
+		t.Fatal("signature didnt match")
+	}
+
+	// change data
+	data[0] = ^data[0]
+	ok, err = pub.Verify(data, sig)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if ok {
+		t.Fatal("signature matched and shouldn't")
+	}
+}
+
+func TestECDSASignZero(t *testing.T) {
+	priv, pub, err := GenerateECDSAKeyPair(rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	data := make([]byte, 0)
+	sig, err := priv.Sign(data)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ok, err := pub.Verify(data, sig)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !ok {
+		t.Fatal("signature didn't match")
+	}
+}
+
+func TestECDSAMarshalLoop(t *testing.T) {
+	priv, pub, err := GenerateECDSAKeyPair(rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	privB, err := priv.Bytes()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	privNew, err := UnmarshalPrivateKey(privB)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !priv.Equals(privNew) || !privNew.Equals(priv) {
+		t.Fatal("keys are not equal")
+	}
+
+	pubB, err := pub.Bytes()
+	if err != nil {
+		t.Fatal(err)
+	}
+	pubNew, err := UnmarshalPublicKey(pubB)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !pub.Equals(pubNew) || !pubNew.Equals(pub) {
+		t.Fatal("keys are not equal")
+	}
+
+}