Custom elliptic curve example

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         go_tags: [ 'stdlib', 'goccy', 'es256k', 'asmbase64', 'alltags']
-        go: [ '1.21', '1.20' ]
+        go: [ '1.21' ]
     name: "Test [ Go ${{ matrix.go }} / Tags ${{ matrix.go_tags }} ]"
     steps:
       - name: Checkout repository

.github/workflows/smoke.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         go_tags: [ 'stdlib', 'goccy', 'es256k', 'alltags' ]
-        go: [ '1.21', '1.20' ]
+        go: [ '1.21' ]
     name: "Smoke [ Go ${{ matrix.go }} / Tags ${{ matrix.go_tags }} ]"
     steps:
       - name: Checkout repository

Changes-v3.md

@@ -8,7 +8,7 @@ These are changes that are incompatible with the v2.x.x version.
 
 ## Module
 
-* This module now requires Go 1.20.x
+* This module now requires Go 1.21
 
 * All `xxx.Get()` methods have been changed from `Get(string) (interface{}, error)` to
   `Get(string, interface{}) error`, where the second argument should be a pointer
@@ -42,7 +42,9 @@ These are changes that are incompatible with the v2.x.x version.
   type to instantiate, and aids implementing your own `jwk.KeyParser`. Also see
   `jwk.RegisterKeyProbe()`
 
-* Conversion between raw keys and `jwk.Key` can be customized using `jwk.KeyConverter`.
-  Also see `jwk.RegisterKeyConverter()`
+* Conversion between raw keys and `jwk.Key` can be customized using `jwk.KeyImporter` and `jwk.KeyExporter`.
+  Also see `jwk.RegisterKeyImporter()` and `jwk.RegisterKeyExporter()`
 
-* Added `jwk/ecdsa` to keep track of which curves are available for ECDSA keys.
+* Added `jwk/ecdsa` to keep track of which curves are available for ECDSA keys.
+
+* `(jwk.Key).Raw()` has been deprecated. Use `jwk.Export()` instead.

examples/go.mod

@@ -4,6 +4,7 @@ go 1.20
 
 require (
 	github.com/cloudflare/circl v1.3.3
+	github.com/emmansun/gmsm v0.21.5
 	github.com/lestrrat-go/jwx/v3 v3.0.0
 )
 

examples/go.sum

@@ -5,6 +5,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 h1:8UrgZ3GkP4i/CLijOJx79Yu+etlyjdBU4sfcs2WYQMs=
 github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0/go.mod h1:v57UDF4pDQJcEfFUCRop3lJL149eHGSe9Jvczhzjo/0=
+github.com/emmansun/gmsm v0.21.5 h1:G4HwuiqNQGZmAlZi233iwDPcfWKcoax0/GzS3eR+l7o=
+github.com/emmansun/gmsm v0.21.5/go.mod h1:5hRB+YZ3dy/llu3dcKyBHieRe5Z2V6sqvNJOWEsIcqQ=
 github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
 github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/lestrrat-go/blackmagic v1.0.2 h1:Cg2gVSc9h7sz9NOByczrbUvLopQmXrfFx//N+AkAr5k=
@@ -24,10 +26,46 @@ github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.14.0 h1:wBqGXzWJW6m1XrIKlAH0Hs1JJ7+9KBwnIO8v66Q9cHc=
 golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
 golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
+golang.org/x/term v0.13.0/go.mod h1:LTmsnFJwVN6bCy1rVCoS+qHT1HhALEFxKncY3WNNh4U=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

examples/jwk_example_test.go

@@ -37,7 +37,7 @@ func ExampleJWK_Usage() {
 
 		// jws and jwe operations can be performed using jwk.Key, but you could also
 		// covert it to their "raw" forms, such as *rsa.PrivateKey or *ecdsa.PrivateKey
-		if err := key.Raw(&rawkey); err != nil {
+		if err := jwk.Export(key, &rawkey); err != nil {
 			log.Printf("failed to create public key: %s", err)
 			return
 		}

examples/jwx_register_ec_and_key_example_test.go

@@ -0,0 +1,169 @@
+package examples_test
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"fmt"
+	"math/big"
+
+	"github.com/emmansun/gmsm/sm2"
+	"github.com/lestrrat-go/jwx/v3/jwa"
+	"github.com/lestrrat-go/jwx/v3/jwk"
+	ourecdsa "github.com/lestrrat-go/jwx/v3/jwk/ecdsa"
+	"github.com/lestrrat-go/jwx/v3/jws"
+)
+
+// Setup. This is something that you probably should do in your adapter
+// library, or in your application's init() function.
+//
+// I could not readily find what the exact curve notation is for ShangMi SM2
+// (either I'm just bad at researching or it's not in an RFC as of this writing)
+// so I'm faking it as "SM2".
+//
+// For demonstration purposes, it could as well be a random string, as long
+// as its consistent in your usage.
+const SM2 jwa.EllipticCurveAlgorithm = "SM2"
+
+func init() {
+	// Register the algorithm name so it can be looked up
+	jwa.RegisterEllipticCurveAlgorithm(SM2)
+
+	// Register the actual ECDSA curve. Notice that we need to tell this
+	// to our jwk library, so that the JWK lookup can be done properly
+	// when a raw SM2 key is passed to various key operations.
+	ourecdsa.RegisterCurve(SM2, sm2.P256())
+
+	// We only need one converter for the private key, because the public key
+	// is exactly the same type as *ecdsa.PublicKey
+	jwk.RegisterKeyImporter(&sm2.PrivateKey{}, jwk.KeyImportFunc(convertShangMiSm2))
+
+	jwk.RegisterKeyExporter(jwa.EC, jwk.KeyExportFunc(convertJWKToShangMiSm2))
+}
+
+func convertShangMiSm2(key interface{}) (jwk.Key, error) {
+	shangmi2pk, ok := key.(*sm2.PrivateKey)
+	if !ok {
+		return nil, fmt.Errorf("invalid SM2 private key")
+	}
+	return jwk.FromRaw(shangmi2pk.PrivateKey)
+}
+
+func convertJWKToShangMiSm2(key jwk.Key, hint interface{}) (interface{}, error) {
+	ecdsaKey, ok := key.(jwk.ECDSAPrivateKey)
+	if !ok {
+		return nil, fmt.Errorf(`invalid key type %T: %w`, key, jwk.ContinueError())
+	}
+	if ecdsaKey.Crv() != SM2 {
+		return nil, fmt.Errorf(`cannot convert curve of type %s to ShangMi key: %w`, ecdsaKey.Crv(), jwk.ContinueError())
+	}
+
+	switch hint.(type) {
+	case *sm2.PrivateKey, *interface{}:
+	default:
+		return nil, fmt.Errorf(`can only convert SM2 key to *sm2.PrivateKey (got %T): %w`, hint, jwk.ContinueError())
+	}
+
+	var ret sm2.PrivateKey
+	ret.PublicKey.Curve = sm2.P256()
+	ret.D = (&big.Int{}).SetBytes(ecdsaKey.D())
+	ret.PublicKey.X = (&big.Int{}).SetBytes(ecdsaKey.X())
+	ret.PublicKey.Y = (&big.Int{}).SetBytes(ecdsaKey.Y())
+	return &ret, nil
+}
+
+// End setup
+
+func ExampleShangMiSm2() {
+	shangmi2pk, _ := sm2.GenerateKey(rand.Reader)
+
+	// Create a jwk.Key from ShangMi SM2 private key
+	shangmi2JWK, err := jwk.FromRaw(shangmi2pk)
+	if err != nil {
+		fmt.Printf("failed to create jwk.Key from raw ShangMi private key: %s\n", err)
+		return
+	}
+
+	{
+		// Create a ShangMi SM2 private key back from the jwk.Key
+		var clone sm2.PrivateKey
+		if err := jwk.Export(shangmi2JWK, &clone); err != nil {
+			fmt.Printf("failed to create ShangMi private key from jwk.Key: %s\n", err)
+			return
+		}
+
+		// Clone should have same Crv, D, X, and Y values
+		if clone.Curve != shangmi2pk.Curve {
+			fmt.Println("curve does not match")
+			return
+		}
+
+		if clone.D.Cmp(shangmi2pk.D) != 0 {
+			fmt.Println("D does not match")
+			return
+		}
+
+		if clone.X.Cmp(shangmi2pk.X) != 0 {
+			fmt.Println("X does not match")
+			return
+		}
+
+		if clone.Y.Cmp(shangmi2pk.Y) != 0 {
+			fmt.Println("Y does not match")
+			return
+		}
+	}
+
+	{ // Can do the same thing for interface{}
+		var clone interface{}
+		if err := jwk.Export(shangmi2JWK, &clone); err != nil {
+			fmt.Printf("failed to create ShangMi private key from jwk.Key (via interface{}): %s\n", err)
+			return
+		}
+	}
+
+	{
+		// Of course, ecdsa.PrivateKeys are also supported separately
+		ecprivkey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		eckjwk, err := jwk.FromRaw(ecprivkey)
+		if err != nil {
+			fmt.Printf("failed to create jwk.Key from raw ShangMi public key: %s\n", err)
+			return
+		}
+		var clone ecdsa.PrivateKey
+		if err := jwk.Export(eckjwk, &clone); err != nil {
+			fmt.Printf("failed to create ShangMi public key from jwk.Key: %s\n", err)
+			return
+		}
+	}
+
+	payload := []byte("Lorem ipsum")
+	signed, err := jws.Sign(payload, jws.WithKey(jwa.ES256, shangmi2JWK))
+	if err != nil {
+		fmt.Printf("Failed to sign using ShangMi key: %s\n", err)
+		return
+	}
+
+	shangmi2PubJWK, err := jwk.PublicKeyOf(shangmi2JWK)
+	if err != nil {
+		fmt.Printf("Failed to create public JWK using ShangMi key: %s\n", err)
+		return
+	}
+
+	verified, err := jws.Verify(signed, jws.WithKey(jwa.ES256, shangmi2PubJWK))
+	if err != nil {
+		fmt.Printf("Failed to verify using ShangMi key: %s\n", err)
+		return
+	}
+
+	if !bytes.Equal(payload, verified) {
+		fmt.Println("payload does not match")
+		return
+	}
+	//OUTPUT:
+}

internal/jwxtest/jwxtest.go

@@ -267,7 +267,7 @@ func DecryptJweFile(ctx context.Context, file string, alg jwa.KeyEncryptionAlgor
 	}
 
 	var rawkey interface{}
-	if err := key.Raw(&rawkey); err != nil {
+	if err := jwk.Export(key, &rawkey); err != nil {
 		return nil, fmt.Errorf(`failed to obtain raw key from JWK: %w`, err)
 	}
 
@@ -285,19 +285,19 @@ func EncryptJweFile(ctx context.Context, payload []byte, keyalg jwa.KeyEncryptio
 	switch keyalg {
 	case jwa.RSA1_5, jwa.RSA_OAEP, jwa.RSA_OAEP_256:
 		var rawkey rsa.PrivateKey
-		if err := key.Raw(&rawkey); err != nil {
+		if err := jwk.Export(key, &rawkey); err != nil {
 			return "", nil, fmt.Errorf(`failed to obtain raw key: %w`, err)
 		}
 		keyif = rawkey.PublicKey
 	case jwa.ECDH_ES, jwa.ECDH_ES_A128KW, jwa.ECDH_ES_A192KW, jwa.ECDH_ES_A256KW:
 		var rawkey ecdsa.PrivateKey
-		if err := key.Raw(&rawkey); err != nil {
+		if err := jwk.Export(key, &rawkey); err != nil {
 			return "", nil, fmt.Errorf(`failed to obtain raw key: %w`, err)
 		}
 		keyif = rawkey.PublicKey
 	default:
 		var rawkey []byte
-		if err := key.Raw(&rawkey); err != nil {
+		if err := jwk.Export(key, &rawkey); err != nil {
 			return "", nil, fmt.Errorf(`failed to obtain raw key: %w`, err)
 		}
 		keyif = rawkey
@@ -323,7 +323,7 @@ func VerifyJwsFile(ctx context.Context, file string, alg jwa.SignatureAlgorithm,
 	}
 
 	var rawkey, pubkey interface{}
-	if err := key.Raw(&rawkey); err != nil {
+	if err := jwk.Export(key, &rawkey); err != nil {
 		return nil, fmt.Errorf(`failed to obtain raw key from JWK: %w`, err)
 	}
 	pubkey = rawkey

internal/keyconv/keyconv.go

@@ -17,7 +17,7 @@ import (
 func RSAPrivateKey(dst, src interface{}) error {
 	if jwkKey, ok := src.(jwk.Key); ok {
 		var raw rsa.PrivateKey
-		if err := jwkKey.Raw(&raw); err != nil {
+		if err := jwk.Export(jwkKey, &raw); err != nil {
 			return fmt.Errorf(`failed to produce rsa.PrivateKey from %T: %w`, src, err)
 		}
 		src = &raw
@@ -42,7 +42,7 @@ func RSAPrivateKey(dst, src interface{}) error {
 func RSAPublicKey(dst, src interface{}) error {
 	if jwkKey, ok := src.(jwk.Key); ok {
 		var raw rsa.PublicKey
-		if err := jwkKey.Raw(&raw); err != nil {
+		if err := jwk.Export(jwkKey, &raw); err != nil {
 			return fmt.Errorf(`failed to produce rsa.PublicKey from %T: %w`, src, err)
 		}
 		src = &raw
@@ -66,7 +66,7 @@ func RSAPublicKey(dst, src interface{}) error {
 func ECDSAPrivateKey(dst, src interface{}) error {
 	if jwkKey, ok := src.(jwk.Key); ok {
 		var raw ecdsa.PrivateKey
-		if err := jwkKey.Raw(&raw); err != nil {
+		if err := jwk.Export(jwkKey, &raw); err != nil {
 			return fmt.Errorf(`failed to produce ecdsa.PrivateKey from %T: %w`, src, err)
 		}
 		src = &raw
@@ -89,7 +89,7 @@ func ECDSAPrivateKey(dst, src interface{}) error {
 func ECDSAPublicKey(dst, src interface{}) error {
 	if jwkKey, ok := src.(jwk.Key); ok {
 		var raw ecdsa.PublicKey
-		if err := jwkKey.Raw(&raw); err != nil {
+		if err := jwk.Export(jwkKey, &raw); err != nil {
 			return fmt.Errorf(`failed to produce ecdsa.PublicKey from %T: %w`, src, err)
 		}
 		src = &raw
@@ -110,7 +110,7 @@ func ECDSAPublicKey(dst, src interface{}) error {
 func ByteSliceKey(dst, src interface{}) error {
 	if jwkKey, ok := src.(jwk.Key); ok {
 		var raw []byte
-		if err := jwkKey.Raw(&raw); err != nil {
+		if err := jwk.Export(jwkKey, &raw); err != nil {
 			return fmt.Errorf(`failed to produce []byte from %T: %w`, src, err)
 		}
 		src = raw
@@ -125,7 +125,7 @@ func ByteSliceKey(dst, src interface{}) error {
 func Ed25519PrivateKey(dst, src interface{}) error {
 	if jwkKey, ok := src.(jwk.Key); ok {
 		var raw ed25519.PrivateKey
-		if err := jwkKey.Raw(&raw); err != nil {
+		if err := jwk.Export(jwkKey, &raw); err != nil {
 			return fmt.Errorf(`failed to produce ed25519.PrivateKey from %T: %w`, src, err)
 		}
 		src = &raw
@@ -146,7 +146,7 @@ func Ed25519PrivateKey(dst, src interface{}) error {
 func Ed25519PublicKey(dst, src interface{}) error {
 	if jwkKey, ok := src.(jwk.Key); ok {
 		var raw ed25519.PublicKey
-		if err := jwkKey.Raw(&raw); err != nil {
+		if err := jwk.Export(jwkKey, &raw); err != nil {
 			return fmt.Errorf(`failed to produce ed25519.PublicKey from %T: %w`, src, err)
 		}
 		src = &raw