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pki.go
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pki.go
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package pki
import (
"crypto"
"crypto/sha256"
"crypto/x509"
"encoding/pem"
"io/ioutil"
"time"
"github.com/cloudflare/cfssl/cli/genkey"
"github.com/cloudflare/cfssl/config"
"github.com/cloudflare/cfssl/csr"
"github.com/cloudflare/cfssl/helpers"
"github.com/cloudflare/cfssl/initca"
clog "github.com/cloudflare/cfssl/log"
"github.com/cloudflare/cfssl/signer"
"github.com/cloudflare/cfssl/signer/local"
"github.com/criticalstack/e2d/pkg/log"
"github.com/pkg/errors"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
const (
ClientSigningProfile = "client"
PeerSigningProfile = "peer"
ServerSigningProfile = "server"
)
var (
SigningProfiles = &config.Signing{
Default: &config.SigningProfile{
Expiry: 5 * 365 * 24 * time.Hour,
},
Profiles: map[string]*config.SigningProfile{
ClientSigningProfile: {
Expiry: 5 * 365 * 24 * time.Hour,
Usage: []string{
"signing",
"key encipherment",
"client auth",
},
},
PeerSigningProfile: {
Expiry: 5 * 365 * 24 * time.Hour,
Usage: []string{
"signing",
"key encipherment",
"server auth",
"client auth",
},
},
ServerSigningProfile: {
Expiry: 5 * 365 * 24 * time.Hour,
Usage: []string{
"signing",
"key encipherment",
"server auth",
},
},
},
}
)
type nopLogger struct {
}
func (nopLogger) Debug(msg string) {}
func (nopLogger) Info(msg string) {}
func (nopLogger) Warning(msg string) {}
func (nopLogger) Err(msg string) {}
func (nopLogger) Crit(msg string) {}
func (nopLogger) Emerg(msg string) {}
type logger struct {
l *zap.Logger
}
func (l *logger) Debug(msg string) { l.l.Debug(msg) }
func (l *logger) Info(msg string) { l.l.Info(msg) }
func (l *logger) Warning(msg string) { l.l.Warn(msg) }
func (l *logger) Err(msg string) { l.l.Error(msg) }
func (l *logger) Crit(msg string) { l.l.Error(msg) }
func (l *logger) Emerg(msg string) { l.l.Fatal(msg) }
func init() {
clog.SetLogger(&logger{log.NewLoggerWithLevel("cfssl", zapcore.ErrorLevel)})
}
type KeyPair struct {
Cert *x509.Certificate
CertPEM []byte
Key crypto.Signer
KeyPEM []byte
}
func NewKeyPairFromPEM(certPEM, keyPEM []byte) (*KeyPair, error) {
cert, err := helpers.ParseCertificatePEM(certPEM)
if err != nil {
return nil, err
}
key, err := helpers.ParsePrivateKeyPEM(keyPEM)
if err != nil {
return nil, err
}
return &KeyPair{
Cert: cert,
CertPEM: certPEM,
Key: key,
KeyPEM: keyPEM,
}, nil
}
type RootCA struct {
CA *KeyPair
g *csr.Generator
sp *config.Signing
}
func NewRootCA(cr *csr.CertificateRequest) (*RootCA, error) {
certPEM, _, keyPEM, err := initca.New(cr)
if err != nil {
return nil, err
}
ca, err := NewKeyPairFromPEM(certPEM, keyPEM)
if err != nil {
return nil, err
}
r := &RootCA{
CA: ca,
g: &csr.Generator{Validator: genkey.Validator},
sp: SigningProfiles,
}
return r, nil
}
func NewRootCAFromFile(certpath, keypath string) (*RootCA, error) {
certPEM, err := ioutil.ReadFile(certpath)
if err != nil {
return nil, err
}
keyPEM, err := ioutil.ReadFile(keypath)
if err != nil {
return nil, err
}
ca, err := NewKeyPairFromPEM(certPEM, keyPEM)
if err != nil {
return nil, err
}
r := &RootCA{
CA: ca,
g: &csr.Generator{Validator: genkey.Validator},
sp: SigningProfiles,
}
return r, nil
}
func NewDefaultRootCA() (*RootCA, error) {
return NewRootCA(&csr.CertificateRequest{
Names: []csr.Name{
{
C: "US",
ST: "Boston",
L: "MA",
O: "Critical Stack",
},
},
KeyRequest: &csr.BasicKeyRequest{
A: "rsa",
S: 2048,
},
CN: "e2d-ca",
})
}
func (r *RootCA) GenerateCertificates(profile string, cr *csr.CertificateRequest) (*KeyPair, error) {
csrBytes, keyPEM, err := r.g.ProcessRequest(cr)
if err != nil {
return nil, err
}
s, err := local.NewSigner(r.CA.Key, r.CA.Cert, signer.DefaultSigAlgo(r.CA.Key), r.sp)
if err != nil {
return nil, err
}
certPEM, err := s.Sign(signer.SignRequest{
Request: string(csrBytes),
Profile: profile,
})
if err != nil {
return nil, err
}
return NewKeyPairFromPEM(certPEM, keyPEM)
}
func GenerateCertHash(caCertPath string) ([]byte, error) {
data, err := ioutil.ReadFile(caCertPath)
if err != nil {
return nil, err
}
block, _ := pem.Decode(data)
if block == nil {
return nil, errors.New("cannot parse PEM formatted block")
}
cert, err := x509.ParseCertificate(block.Bytes)
if err != nil {
return nil, err
}
h := sha256.Sum256(cert.RawSubjectPublicKeyInfo)
return h[:], nil
}