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certificate.go
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certificate.go
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/*
* Copyright 2018-2023 Venafi, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package certificate
import (
"crypto"
"crypto/ecdsa"
"crypto/ed25519"
"crypto/elliptic"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"fmt"
"reflect"
"sort"
"time"
"github.com/youmark/pkcs8"
"github.com/Venafi/vcert/v5/pkg/util"
"github.com/Venafi/vcert/v5/pkg/verror"
)
const (
DefaultRSAlength int = 2048
)
func AllSupportedKeySizes() []int {
return []int{1024, DefaultRSAlength, 4096, 8192}
}
//SSH Certificate structures
// SshCertRequest This request is a standard one, it will hold data for tpp request
// and in the future it will hold VaS data.
type SshCertRequest struct {
Template string
PolicyDN string
ObjectName string
DestinationAddresses []string
KeyId string
Principals []string
ValidityPeriod string
PublicKeyData string
Extensions []string
ForceCommand string
SourceAddresses []string
PickupID string
Guid string
IncludePrivateKeyData bool
PrivateKeyPassphrase string
PrivateKeyFormat string
IncludeCertificateDetails bool
Timeout time.Duration
}
type TPPSshCertRequest struct {
CADN string `json:"CADN,omitempty"`
PolicyDN string `json:"PolicyDN,omitempty"`
ObjectName string `json:"ObjectName,omitempty"`
DestinationAddresses []string `json:"DestinationAddresses,omitempty"`
KeyId string `json:"KeyId,omitempty"`
Principals []string `json:"Principals,omitempty"`
ValidityPeriod string `json:"ValidityPeriod,omitempty"`
PublicKeyData string `json:"PublicKeyData,omitempty"`
Extensions map[string]interface{} `json:"Extensions,omitempty"`
ForceCommand string `json:"ForceCommand,omitempty"`
SourceAddresses []string `json:"SourceAddresses,omitempty"`
IncludePrivateKeyData bool `json:"IncludePrivateKeyData,omitempty"`
PrivateKeyPassphrase string `json:"PrivateKeyPassphrase,omitempty"`
IncludeCertificateDetails bool `json:"IncludeCertificateDetails,omitempty"`
ProcessingTimeout string `json:"ProcessingTimeout,omitempty"`
}
type TppSshCertResponseInfo struct {
ErrorCode int
ErrorMessage string
Success bool
}
type TppSshCertRetrieveRequest struct {
Guid string
DN string
IncludePrivateKeyData bool
PrivateKeyPassphrase string
PrivateKeyFormat string
IncludeCertificateDetails bool
}
type TppSshCertOperationResponse struct {
ProcessingDetails ProcessingDetails
Guid string
DN string
CertificateData string
PrivateKeyData string
PublicKeyData string
CAGuid string
CADN string
CertificateDetails SshCertificateDetails
Response TppSshCertResponseInfo
}
type SshCertificateObject struct {
Guid string
DN string
CAGuid string
CADN string
CertificateData string
PrivateKeyData string
PublicKeyData string
CertificateDetails SshCertificateDetails
ProcessingDetails ProcessingDetails
}
type SshCertificateDetails struct {
KeyType string `json:"KeyType,omitempty"`
CertificateType string `json:"CertificateType,omitempty"`
CertificateFingerprintSHA256 string `json:"CertificateFingerprintSHA256,omitempty"`
CAFingerprintSHA256 string `json:"CAFingerprintSHA256,omitempty"`
KeyID string `json:"KeyID,omitempty"`
SerialNumber string `json:"SerialNumber,omitempty"`
Principals []string `json:"Principals,omitempty"`
ValidFrom int64 `json:"ValidFrom,omitempty"`
ValidTo int64 `json:"ValidTo,omitempty"`
ForceCommand string `json:"ForceCommand,omitempty"`
SourceAddresses []string `json:"SourceAddresses,omitempty"`
PublicKeyFingerprintSHA256 string `json:"PublicKeyFingerprintSHA256,omitempty"`
Extensions map[string]interface{} `json:"Extensions,omitempty"`
}
type ProcessingDetails struct {
Status string `json:"Status,omitempty"`
StatusDescription string `json:"StatusDescription,omitempty"`
}
type RevocationRequest struct {
CertificateDN string
Thumbprint string
Reason string
Comments string
Disable bool
}
type RetireRequest struct {
CertificateDN string
Thumbprint string
Description string
}
type RenewalRequest struct {
CertificateDN string // these fields are for certificate lookup on remote
Thumbprint string
CertificateRequest *Request // here CSR should be filled
}
type ImportRequest struct {
PolicyDN string
ObjectName string
CertificateData string
PrivateKeyData string
Password string
Reconcile bool
CustomFields []CustomField
}
type ImportResponse struct {
CertificateDN string `json:",omitempty"`
CertId string `json:",omitempty"`
CertificateVaultId int `json:",omitempty"`
Guid string `json:",omitempty"`
PrivateKeyVaultId int `json:",omitempty"`
}
type Sans struct {
DNS []string
Email []string `json:",omitempty"`
IP []string `json:",omitempty"`
URI []string `json:",omitempty"`
UPN []string `json:",omitempty"`
}
type CertificateInfo struct {
ID string `json:",omitempty"`
CN string
SANS Sans
Serial string
Thumbprint string
ValidFrom time.Time
ValidTo time.Time
}
type SearchRequest []string
type CertSearchResponse struct {
Certificates []CertSeachInfo `json:"Certificates"`
Count int `json:"TotalCount"`
}
type CertificateMetaData struct {
Approver []string `json:"Approver"`
CreatedOn string `json:"CreatedOn"`
CertificateAuthorityDN string `json:"CertificateAuthorityDN"`
Contact []string `json:"Contact"`
CreatedBy []string `json:"CreatedBy"`
CertificateDetails struct {
AIACAIssuerURL []string `json:"AIACAIssuerURL"`
AIAKeyIdentifier string `json:"AIAKeyIdentifier"`
C string `json:"C"`
CDPURI string `json:"CDPURI"`
CN string `json:"CN"`
EnhancedKeyUsage string `json:"EnhancedKeyUsage"`
Issuer string `json:"Issuer"`
KeyAlgorithm string `json:"KeyAlgorithm"`
KeySize int `json:"KeySize"`
KeyUsage string `json:"KeyUsage"`
L string `json:"L"`
O string `json:"O"`
OU []string `json:"OU"`
PublicKeyHash string `json:"PublicKeyHash"`
S string `json:"S"`
SKIKeyIdentifier string `json:"SKIKeyIdentifier"`
Serial string `json:"Serial"`
SignatureAlgorithm string `json:"SignatureAlgorithm"`
SignatureAlgorithmOID string `json:"SignatureAlgorithmOID"`
StoreAdded time.Time `json:"StoreAdded"`
Subject string `json:"Subject"`
TemplateMajorVersion string `json:"TemplateMajorVersion"`
TemplateMinorVersion string `json:"TemplateMinorVersion"`
TemplateName string `json:"TemplateName"`
TemplateOID string `json:"TemplateOID"`
Thumbprint string `json:"Thumbprint"`
ValidFrom time.Time `json:"ValidFrom"`
ValidTo time.Time `json:"ValidTo"`
} `json:"CertificateDetails"`
RenewalDetails struct {
City string `json:"City"`
Country string `json:"Country"`
KeySize int `json:"KeySize"`
Organization string `json:"Organization"`
OrganizationalUnit []string `json:"OrganizationalUnit"`
State string `json:"State"`
Subject string `json:"Subject"`
} `json:"RenewalDetails"`
ValidationDetails struct {
LastValidationStateUpdate time.Time `json:"LastValidationStateUpdate"`
NetworkValidationDisabled bool `json:"NetworkValidationDisabled"`
ValidationDisabled bool `json:"ValidationDisabled"`
} `json:"ValidationDetails"`
CustomFields []CustomFieldDetails `json:"CustomFields"`
DN string `json:"DN"`
Guid string `json:"Guid"`
ManagementType string `json:"ManagementType"`
Name string `json:"Name"`
Origin string `json:"Origin"`
ParentDn string `json:"ParentDn"`
SchemaClass string `json:"SchemaClass"`
}
type CustomFieldDetails struct {
Name string `json:"Name"`
Type string `json:"Type"`
Value []string `json:"Value"`
}
type CertSeachInfo struct {
CertificateRequestId string `json:"DN"`
CertificateRequestGuid string `json:"Guid"`
}
// Deprecated: GenerateRequest is deprecated
// Please use method Request.GenerateCSR()
// GenerateRequest generates a certificate request
// TODO: Remove usage from all libraries, deprecated
func GenerateRequest(request *Request, privateKey crypto.Signer) error {
pk := request.PrivateKey
request.PrivateKey = privateKey
err := request.GenerateCSR()
request.PrivateKey = pk
return err
}
func publicKey(priv crypto.Signer) crypto.PublicKey {
if priv != nil {
return priv.Public()
}
return nil
}
func PublicKey(priv crypto.Signer) crypto.PublicKey {
return publicKey(priv)
}
// GetPrivateKeyPEMBock gets the private key as a PEM data block
func GetPrivateKeyPEMBock(key crypto.Signer, format ...string) (*pem.Block, error) {
currentFormat := ""
if len(format) > 0 && format[0] != "" {
currentFormat = format[0]
}
switch k := key.(type) {
case *rsa.PrivateKey:
if currentFormat == "legacy-pem" {
return &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(k)}, nil
} else {
dataBytes, err := pkcs8.MarshalPrivateKey(key.(*rsa.PrivateKey), nil, nil)
if err != nil {
return nil, err
}
return &pem.Block{Type: "PRIVATE KEY", Bytes: dataBytes}, err
}
case *ecdsa.PrivateKey:
if currentFormat == "legacy-pem" {
b, err := x509.MarshalECPrivateKey(k)
if err != nil {
return nil, err
}
return &pem.Block{Type: "EC PRIVATE KEY", Bytes: b}, nil
} else {
dataBytes, err := pkcs8.MarshalPrivateKey(key.(*ecdsa.PrivateKey), nil, nil)
if err != nil {
return nil, err
}
return &pem.Block{Type: "PRIVATE KEY", Bytes: dataBytes}, err
}
case ed25519.PrivateKey:
if currentFormat == "legacy-pem" {
return nil, fmt.Errorf("%w: unable to format Key. Legacy format for ed25519 is not supported", verror.VcertError)
} else {
dataBytes, err := pkcs8.MarshalPrivateKey(key.(ed25519.PrivateKey), nil, nil)
if err != nil {
return nil, err
}
return &pem.Block{Type: "PRIVATE KEY", Bytes: dataBytes}, err
}
default:
return nil, fmt.Errorf("%w: unable to format Key", verror.VcertError)
}
}
// GetEncryptedPrivateKeyPEMBock gets the private key as an encrypted PEM data block
func GetEncryptedPrivateKeyPEMBock(key crypto.Signer, password []byte, format ...string) (*pem.Block, error) {
currentFormat := ""
if len(format) > 0 && format[0] != "" {
currentFormat = format[0]
}
switch k := key.(type) {
case *rsa.PrivateKey:
if currentFormat == "legacy-pem" {
return util.X509EncryptPEMBlock(rand.Reader, "RSA PRIVATE KEY", x509.MarshalPKCS1PrivateKey(k), password, util.PEMCipherAES256)
} else {
dataBytes, err := pkcs8.MarshalPrivateKey(key.(*rsa.PrivateKey), password, nil)
if err != nil {
return nil, err
}
return &pem.Block{Type: "ENCRYPTED PRIVATE KEY", Bytes: dataBytes}, err
}
case *ecdsa.PrivateKey:
if currentFormat == "legacy-pem" {
b, err := x509.MarshalECPrivateKey(k)
if err != nil {
return nil, err
}
return util.X509EncryptPEMBlock(rand.Reader, "EC PRIVATE KEY", b, password, util.PEMCipherAES256)
} else {
dataBytes, err := pkcs8.MarshalPrivateKey(key.(*ecdsa.PrivateKey), password, nil)
if err != nil {
return nil, err
}
return &pem.Block{Type: "ENCRYPTED PRIVATE KEY", Bytes: dataBytes}, err
}
case ed25519.PrivateKey:
if currentFormat == "legacy-pem" {
return nil, fmt.Errorf("%w: unable to format Key. Legacy format for ed25519 is not supported", verror.VcertError)
} else {
dataBytes, err := pkcs8.MarshalPrivateKey(key.(ed25519.PrivateKey), password, nil)
if err != nil {
return nil, err
}
return &pem.Block{Type: "ENCRYPTED PRIVATE KEY", Bytes: dataBytes}, err
}
default:
return nil, fmt.Errorf("%w: unable to format Key", verror.VcertError)
}
}
// GetCertificatePEMBlock gets the certificate as a PEM data block
func GetCertificatePEMBlock(cert []byte) *pem.Block {
return &pem.Block{Type: "CERTIFICATE", Bytes: cert}
}
// GetCertificateRequestPEMBlock gets the certificate request as a PEM data block
func GetCertificateRequestPEMBlock(request []byte) *pem.Block {
return &pem.Block{Type: "CERTIFICATE REQUEST", Bytes: request}
}
// GenerateECDSAPrivateKey generates a new ecdsa private key using the curve specified
func GenerateECDSAPrivateKey(curve EllipticCurve) (crypto.Signer, error) {
var priv crypto.Signer
var c elliptic.Curve
var err error
if curve == EllipticCurveNotSet {
curve = EllipticCurveDefault
}
switch curve {
case EllipticCurveP521:
c = elliptic.P521()
case EllipticCurveP384:
c = elliptic.P384()
case EllipticCurveP256:
c = elliptic.P256()
case EllipticCurveED25519:
return nil, fmt.Errorf("%w: unable to generate ECDSA key. ED25519 curve is not supported, use GenerateED25519PrivateKey instead", verror.VcertError)
}
priv, err = ecdsa.GenerateKey(c, rand.Reader)
if err != nil {
return nil, err
}
return priv, nil
}
func GenerateED25519PrivateKey() (crypto.Signer, error) {
_, priv, err := ed25519.GenerateKey(rand.Reader)
if err != nil {
return nil, err
}
return priv, nil
}
// GenerateRSAPrivateKey generates a new rsa private key using the size specified
func GenerateRSAPrivateKey(size int) (*rsa.PrivateKey, error) {
priv, err := rsa.GenerateKey(rand.Reader, size)
if err != nil {
return nil, err
}
return priv, nil
}
// NewRequest duplicates new Request object based on issued certificate
func NewRequest(cert *x509.Certificate) *Request {
req := &Request{}
// First populate with *cert content
req.Subject = cert.Subject
req.DNSNames = cert.DNSNames
req.EmailAddresses = cert.EmailAddresses
req.IPAddresses = cert.IPAddresses
req.URIs = cert.URIs
req.UPNs, _ = getUserPrincipalNameSANs(cert)
req.SignatureAlgorithm = cert.SignatureAlgorithm
switch pub := cert.PublicKey.(type) {
case *rsa.PublicKey:
req.KeyType = KeyTypeRSA
req.KeyLength = pub.N.BitLen()
case *ecdsa.PublicKey:
req.KeyType = KeyTypeECDSA
_ = req.KeyCurve.Set(pub.Curve.Params().Name)
case ed25519.PublicKey:
req.KeyType = KeyTypeED25519
_ = req.KeyCurve.Set("ed25519")
default:
// vcert only works with RSA, ECDSA & Ed25519 keys
}
return req
}
// FindNewestCertificateWithSans finds a certificate from a list of certificates whose Sans.DNS matches and is
// the newest
func FindNewestCertificateWithSans(certificates []*CertificateInfo, sans_ *Sans) (*CertificateInfo, error) {
sans := Sans{}
if sans_ != nil {
sans.DNS = sans_.DNS
}
// order provided SANS-DNS
sort.Strings(sans.DNS)
// create local variable to hold the newest certificate
var newestCertificate *CertificateInfo
for _, certificate := range certificates {
// order certificate SANS before comparison
if certificate.SANS.DNS != nil {
sort.Strings(certificate.SANS.DNS)
}
// exact match SANs
if reflect.DeepEqual(sans.DNS, certificate.SANS.DNS) {
// update the certificate to the newest match
if newestCertificate == nil || certificate.ValidTo.Unix() > newestCertificate.ValidTo.Unix() {
newestCertificate = certificate
}
}
}
// a valid certificate has been found, return it
if newestCertificate != nil {
return newestCertificate, nil
}
// fail, since no valid certificate was found at this point
return nil, verror.NoCertificateFoundError
}