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package examples_test
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/rsa"
"fmt"
"github.com/lestrrat-go/jwx/v2/jwk"
)
func Example_jwk_from_raw() {
// First, THIS IS THE WRONG WAY TO USE jwk.FromRaw().
//
// Assume that the file contains a JWK in JSON format
//
// buf, _ := os.ReadFile(file)
// key, _ := jwk.FromRaw(buf)
//
// This is not right, because the jwk.FromRaw() function determines
// the type of `jwk.Key` to create based on the TYPE of the argument.
// In this case the type of `buf` is always []byte, and therefore
// it will always create a symmetric key.
//
// What you want to do is to _parse_ `buf`.
//
// keyset, _ := jwk.Parse(buf)
// key, _ := jwk.ParseKey(buf)
//
// See other examples in examples/jwk_parse_key_example_test.go and
// examples/jwk_parse_jwks_example_test.go
// []byte -> jwk.SymmetricKey
{
raw := []byte("Lorem Ipsum")
key, err := jwk.FromRaw(raw)
if err != nil {
fmt.Printf("failed to create symmetric key: %s\n", err)
return
}
if _, ok := key.(jwk.SymmetricKey); !ok {
fmt.Printf("expected jwk.SymmetricKey, got %T\n", key)
return
}
}
// *rsa.PrivateKey -> jwk.RSAPrivateKey
// *rsa.PublicKey -> jwk.RSAPublicKey
{
raw, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
fmt.Printf("failed to generate new RSA private key: %s\n", err)
return
}
key, err := jwk.FromRaw(raw)
if err != nil {
fmt.Printf("failed to create symmetric key: %s\n", err)
return
}
if _, ok := key.(jwk.RSAPrivateKey); !ok {
fmt.Printf("expected jwk.SymmetricKey, got %T\n", key)
return
}
// PublicKey is omitted for brevity
}
// *ecdsa.PrivateKey -> jwk.ECDSAPrivateKey
// *ecdsa.PublicKey -> jwk.ECDSAPublicKey
{
raw, err := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
if err != nil {
fmt.Printf("failed to generate new ECDSA private key: %s\n", err)
return
}
key, err := jwk.FromRaw(raw)
if err != nil {
fmt.Printf("failed to create symmetric key: %s\n", err)
return
}
if _, ok := key.(jwk.ECDSAPrivateKey); !ok {
fmt.Printf("expected jwk.SymmetricKey, got %T\n", key)
return
}
// PublicKey is omitted for brevity
}
// OUTPUT:
}
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