.

vendor/github.com/MicahParks/keyfunc/v2/oct.go

@@ -0,0 +1,28 @@
+package keyfunc
+
+import (
+	"fmt"
+)
+
+const (
+	// ktyOct is the key type (kty) in the JWT header for oct.
+	ktyOct = "oct"
+)
+
+// Oct parses a jsonWebKey and turns it into a raw byte slice (octet). This includes HMAC keys.
+func (j *jsonWebKey) Oct() (publicKey []byte, err error) {
+	if j.K == "" {
+		return nil, fmt.Errorf("%w: %s", ErrMissingAssets, ktyOct)
+	}
+
+	// Decode the octet key from Base64.
+	//
+	// According to RFC 7517, this is Base64 URL bytes.
+	// https://datatracker.ietf.org/doc/html/rfc7517#section-1.1
+	publicKey, err = base64urlTrailingPadding(j.K)
+	if err != nil {
+		return nil, err
+	}
+
+	return publicKey, nil
+}