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// Copyright 2022 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.
//go:build boringcrypto
package x509
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/internal/boring/fipstls"
"crypto/rand"
"crypto/rsa"
"crypto/x509/pkix"
"fmt"
"math/big"
"strings"
"testing"
"time"
)
const (
boringCertCA = iota
boringCertLeaf
boringCertFIPSOK = 0x80
)
func boringRSAKey(t *testing.T, size int) *rsa.PrivateKey {
k, err := rsa.GenerateKey(rand.Reader, size)
if err != nil {
t.Fatal(err)
}
return k
}
func boringECDSAKey(t *testing.T, curve elliptic.Curve) *ecdsa.PrivateKey {
k, err := ecdsa.GenerateKey(curve, rand.Reader)
if err != nil {
t.Fatal(err)
}
return k
}
type boringCertificate struct {
name string
org string
parentOrg string
der []byte
cert *Certificate
key interface{}
fipsOK bool
}
func TestBoringAllowCert(t *testing.T) {
R1 := testBoringCert(t, "R1", boringRSAKey(t, 2048), nil, boringCertCA|boringCertFIPSOK)
R2 := testBoringCert(t, "R2", boringRSAKey(t, 512), nil, boringCertCA)
R3 := testBoringCert(t, "R3", boringRSAKey(t, 4096), nil, boringCertCA|boringCertFIPSOK)
M1_R1 := testBoringCert(t, "M1_R1", boringECDSAKey(t, elliptic.P256()), R1, boringCertCA|boringCertFIPSOK)
M2_R1 := testBoringCert(t, "M2_R1", boringECDSAKey(t, elliptic.P224()), R1, boringCertCA)
I_R1 := testBoringCert(t, "I_R1", boringRSAKey(t, 3072), R1, boringCertCA|boringCertFIPSOK)
testBoringCert(t, "I_R2", I_R1.key, R2, boringCertCA|boringCertFIPSOK)
testBoringCert(t, "I_M1", I_R1.key, M1_R1, boringCertCA|boringCertFIPSOK)
testBoringCert(t, "I_M2", I_R1.key, M2_R1, boringCertCA|boringCertFIPSOK)
I_R3 := testBoringCert(t, "I_R3", boringRSAKey(t, 3072), R3, boringCertCA|boringCertFIPSOK)
testBoringCert(t, "I_R3", I_R3.key, R3, boringCertCA|boringCertFIPSOK)
testBoringCert(t, "L1_I", boringECDSAKey(t, elliptic.P384()), I_R1, boringCertLeaf|boringCertFIPSOK)
testBoringCert(t, "L2_I", boringRSAKey(t, 1024), I_R1, boringCertLeaf)
}
func testBoringCert(t *testing.T, name string, key interface{}, parent *boringCertificate, mode int) *boringCertificate {
org := name
parentOrg := ""
if i := strings.Index(org, "_"); i >= 0 {
org = org[:i]
parentOrg = name[i+1:]
}
tmpl := &Certificate{
SerialNumber: big.NewInt(1),
Subject: pkix.Name{
Organization: []string{org},
},
NotBefore: time.Unix(0, 0),
NotAfter: time.Unix(0, 0),
KeyUsage: KeyUsageKeyEncipherment | KeyUsageDigitalSignature,
ExtKeyUsage: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth},
BasicConstraintsValid: true,
}
if mode&^boringCertFIPSOK == boringCertLeaf {
tmpl.DNSNames = []string{"example.com"}
} else {
tmpl.IsCA = true
tmpl.KeyUsage |= KeyUsageCertSign
}
var pcert *Certificate
var pkey interface{}
if parent != nil {
pcert = parent.cert
pkey = parent.key
} else {
pcert = tmpl
pkey = key
}
var pub interface{}
var desc string
switch k := key.(type) {
case *rsa.PrivateKey:
pub = &k.PublicKey
desc = fmt.Sprintf("RSA-%d", k.N.BitLen())
case *ecdsa.PrivateKey:
pub = &k.PublicKey
desc = "ECDSA-" + k.Curve.Params().Name
default:
t.Fatalf("invalid key %T", key)
}
der, err := CreateCertificate(rand.Reader, tmpl, pcert, pub, pkey)
if err != nil {
t.Fatal(err)
}
cert, err := ParseCertificate(der)
if err != nil {
t.Fatal(err)
}
// Tell isBoringCertificate to enforce FIPS restrictions for this check.
fipstls.Force()
defer fipstls.Abandon()
fipsOK := mode&boringCertFIPSOK != 0
if boringAllowCert(cert) != fipsOK {
t.Errorf("boringAllowCert(cert with %s key) = %v, want %v", desc, !fipsOK, fipsOK)
}
return &boringCertificate{name, org, parentOrg, der, cert, key, fipsOK}
}
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