1 files changed, 16 insertions, 0 deletions
diff --git a/modules/util/keypair.go b/modules/util/keypair.go
index 5a3ce715a4..97f2d9ebca 100644
--- a/modules/util/keypair.go
+++ b/modules/util/keypair.go
@@ -4,10 +4,13 @@
 package util
 
 import (
+	"crypto"
 	"crypto/rand"
 	"crypto/rsa"
 	"crypto/x509"
 	"encoding/pem"
+
+	"github.com/minio/sha256-simd"
 )
 
 // GenerateKeyPair generates a public and private keypair
@@ -43,3 +46,16 @@ func pemBlockForPub(pub *rsa.PublicKey) (string, error) {
 	})
 	return string(pubBytes), nil
 }
+
+// CreatePublicKeyFingerprint creates a fingerprint of the given key.
+// The fingerprint is the sha256 sum of the PKIX structure of the key.
+func CreatePublicKeyFingerprint(key crypto.PublicKey) ([]byte, error) {
+	bytes, err := x509.MarshalPKIXPublicKey(key)
+	if err != nil {
+		return nil, err
+	}
+
+	checksum := sha256.Sum256(bytes)
+
+	return checksum[:], nil
+}