vendor latest c/common from main

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

vendor/github.com/smallstep/pkcs7/internal/legacy/x509/pkcs1.go

@@ -0,0 +1,15 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package legacyx509
+
+import (
+	"math/big"
+)
+
+// pkcs1PublicKey reflects the ASN.1 structure of a PKCS #1 public key.
+type pkcs1PublicKey struct {
+	N *big.Int
+	E int
+}