use a fallback basicEquals function everywhere

This also ensures we check that the types are equal, even if we're comparing
directly with `k1.Equals(k2)` instead of `KeyEquals(k1, k2)`.

crypto/ecdsa.go

@@ -119,7 +119,7 @@ func (ePriv *ECDSAPrivateKey) Raw() ([]byte, error) {
 func (ePriv *ECDSAPrivateKey) Equals(o Key) bool {
 	oPriv, ok := o.(*ECDSAPrivateKey)
 	if !ok {
-		return false
+		return basicEquals(ePriv, o)
 	}
 
 	return ePriv.priv.D.Cmp(oPriv.priv.D) == 0
@@ -163,7 +163,7 @@ func (ePub ECDSAPublicKey) Raw() ([]byte, error) {
 func (ePub *ECDSAPublicKey) Equals(o Key) bool {
 	oPub, ok := o.(*ECDSAPublicKey)
 	if !ok {
-		return false
+		return basicEquals(ePub, o)
 	}
 
 	return ePub.pub.X != nil && ePub.pub.Y != nil && oPub.pub.X != nil && oPub.pub.Y != nil &&

crypto/key.go

@@ -4,6 +4,7 @@
 package crypto
 
 import (
+	"bytes"
 	"crypto/elliptic"
 	"crypto/hmac"
 	"crypto/rand"
@@ -363,9 +364,21 @@ func KeyEqual(k1, k2 Key) bool {
 		return true
 	}
 
+	return k1.Equals(k2)
+}
+
+func basicEquals(k1, k2 Key) bool {
 	if k1.Type() != k2.Type() {
 		return false
 	}
 
-	return k1.Equals(k2)
+	a, err := k1.Raw()
+	if err != nil {
+		return false
+	}
+	b, err := k2.Raw()
+	if err != nil {
+		return false
+	}
+	return bytes.Equal(a, b)
 }

crypto/openssl_common.go

@@ -3,8 +3,6 @@
 package crypto
 
 import (
-	"bytes"
-
 	pb "github.com/libp2p/go-libp2p-core/crypto/pb"
 
 	openssl "github.com/libp2p/go-openssl"
@@ -65,16 +63,7 @@ func (pk *opensslPublicKey) Raw() ([]byte, error) {
 func (pk *opensslPublicKey) Equals(k Key) bool {
 	k0, ok := k.(*RsaPublicKey)
 	if !ok {
-		a, err := pk.Raw()
-		if err != nil {
-			return false
-		}
-		b, err := k.Raw()
-		if err != nil {
-			return false
-		}
-
-		return bytes.Equal(a, b)
+		return basicEquals(pk, k)
 	}
 
 	return pk.key.Equal(k0.opensslPublicKey.key)
@@ -112,16 +101,7 @@ func (sk *opensslPrivateKey) Raw() ([]byte, error) {
 func (sk *opensslPrivateKey) Equals(k Key) bool {
 	k0, ok := k.(*RsaPrivateKey)
 	if !ok {
-		a, err := sk.Raw()
-		if err != nil {
-			return false
-		}
-		b, err := k.Raw()
-		if err != nil {
-			return false
-		}
-
-		return bytes.Equal(a, b)
+		return basicEquals(sk, k)
 	}
 
 	return sk.key.Equal(k0.opensslPrivateKey.key)

crypto/rsa_go.go

@@ -3,7 +3,6 @@
 package crypto
 
 import (
-	"bytes"
 	"crypto"
 	"crypto/rand"
 	"crypto/rsa"
@@ -67,15 +66,7 @@ func (pk *RsaPublicKey) Equals(k Key) bool {
 	// make sure this is an rsa public key
 	other, ok := (k).(*RsaPublicKey)
 	if !ok {
-		a, err := pk.Raw()
-		if err != nil {
-			return false
-		}
-		b, err := k.Raw()
-		if err != nil {
-			return false
-		}
-		return bytes.Equal(a, b)
+		return basicEquals(pk, k)
 	}
 
 	return pk.k.N.Cmp(other.k.N) == 0 && pk.k.E == other.k.E
@@ -111,15 +102,7 @@ func (sk *RsaPrivateKey) Equals(k Key) bool {
 	// make sure this is an rsa public key
 	other, ok := (k).(*RsaPrivateKey)
 	if !ok {
-		a, err := sk.Raw()
-		if err != nil {
-			return false
-		}
-		b, err := k.Raw()
-		if err != nil {
-			return false
-		}
-		return bytes.Equal(a, b)
+		return basicEquals(sk, k)
 	}
 
 	a := sk.sk

crypto/secp256k1.go

@@ -66,7 +66,7 @@ func (k *Secp256k1PrivateKey) Raw() ([]byte, error) {
 func (k *Secp256k1PrivateKey) Equals(o Key) bool {
 	sk, ok := o.(*Secp256k1PrivateKey)
 	if !ok {
-		return false
+		return basicEquals(k, o)
 	}
 
 	return k.D.Cmp(sk.D) == 0
@@ -107,7 +107,7 @@ func (k *Secp256k1PublicKey) Raw() ([]byte, error) {
 func (k *Secp256k1PublicKey) Equals(o Key) bool {
 	sk, ok := o.(*Secp256k1PublicKey)
 	if !ok {
-		return false
+		return basicEquals(k, o)
 	}
 
 	return (*btcec.PublicKey)(k).IsEqual((*btcec.PublicKey)(sk))