github.com/mirantis/virtlet@v1.5.2-0.20191204181327-1659b8a48e9b/pkg/utils/testing/https.go (about)

     1  /*
     2  Copyright 2018 Mirantis
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package testing
    18  
    19  import (
    20  	"bytes"
    21  	"crypto/rand"
    22  	"crypto/rsa"
    23  	"crypto/x509"
    24  	"encoding/pem"
    25  	"math/big"
    26  	"net"
    27  	"testing"
    28  	"time"
    29  )
    30  
    31  func GenerateCert(t *testing.T, isCA bool, host string, signer *x509.Certificate, key *rsa.PrivateKey) (*x509.Certificate, *rsa.PrivateKey) {
    32  	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 64)
    33  	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
    34  	if err != nil {
    35  		t.Fatal(err)
    36  	}
    37  	if key == nil {
    38  		key, err = rsa.GenerateKey(rand.Reader, 2048)
    39  		if err != nil {
    40  			t.Fatal(err)
    41  		}
    42  	}
    43  
    44  	template := &x509.Certificate{
    45  		SerialNumber:          serialNumber,
    46  		NotBefore:             time.Now(),
    47  		NotAfter:              time.Now().Add(24 * time.Hour),
    48  		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
    49  		BasicConstraintsValid: true,
    50  	}
    51  
    52  	if ip := net.ParseIP(host); ip != nil {
    53  		template.IPAddresses = []net.IP{ip}
    54  	} else {
    55  		template.DNSNames = []string{host}
    56  	}
    57  
    58  	if isCA {
    59  		template.IsCA = true
    60  		template.KeyUsage |= x509.KeyUsageCertSign
    61  	}
    62  
    63  	if signer == nil {
    64  		signer = template
    65  	}
    66  
    67  	der, err := x509.CreateCertificate(rand.Reader, template, signer, &key.PublicKey, key)
    68  	if err != nil {
    69  		t.Fatal(err)
    70  	}
    71  	cert, err := x509.ParseCertificate(der)
    72  	if err != nil {
    73  		t.Fatal(err)
    74  	}
    75  	return cert, key
    76  }
    77  
    78  func EncodePEMCert(cert *x509.Certificate) string {
    79  	buf := bytes.NewBufferString("")
    80  	pem.Encode(buf, &pem.Block{Type: "CERTIFICATE", Bytes: cert.Raw})
    81  	return buf.String()
    82  }
    83  
    84  func EncodePEMKey(key *rsa.PrivateKey) string {
    85  	buf := bytes.NewBufferString("")
    86  	pem.Encode(buf, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)})
    87  	return buf.String()
    88  }