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ssl.go
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ssl.go
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package afssl
import (
"crypto/ecdsa"
"crypto/ed25519"
"crypto/rand"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"fmt"
"github.com/aacfactory/afssl/gmsm/sm2"
"github.com/aacfactory/afssl/gmsm/smx509"
"github.com/aacfactory/afssl/gmsm/tlcp"
"math/big"
"net"
"strings"
"time"
)
type GenerateCertificateOption func(*GenerateCertificateOptions) error
func WithSerialNumber(sn uint64) GenerateCertificateOption {
return func(options *GenerateCertificateOptions) error {
if sn < 1 {
return fmt.Errorf("invalid serial number")
}
options.serialNumber.SetUint64(sn)
return nil
}
}
func CA() GenerateCertificateOption {
return func(options *GenerateCertificateOptions) error {
options.isCA = true
return nil
}
}
func WithExpirationDays(days int) GenerateCertificateOption {
return func(options *GenerateCertificateOptions) error {
if days < 1 {
return fmt.Errorf("invalid expiration days")
}
options.expire = time.Duration(days) * 24 * time.Hour
return nil
}
}
func WithKeyType(keyType KeyType) GenerateCertificateOption {
return func(options *GenerateCertificateOptions) error {
options.keyType = keyType
return nil
}
}
func WithParent(certPEM []byte, keyPEM []byte) GenerateCertificateOption {
return func(options *GenerateCertificateOptions) error {
key, keyType, parseKeyErr := ParsePrivateKey(keyPEM)
if parseKeyErr != nil {
return parseKeyErr
}
options.keyType = keyType
options.parentKey = key
certBlock, _ := pem.Decode(certPEM)
if certBlock.Type != "CERTIFICATE" {
return fmt.Errorf("invalid cert pem")
}
switch keyType.Name() {
case sm2KeyTypeName, sm9KeyTypeName:
cert, parseCertErr := smx509.ParseCertificate(certBlock.Bytes)
if parseCertErr != nil {
return parseCertErr
}
options.parent = cert
options.expire = cert.NotAfter.Sub(time.Now())/24 - 1
break
default:
cert, parseCertErr := x509.ParseCertificate(certBlock.Bytes)
if parseCertErr != nil {
return parseCertErr
}
options.parent = cert
options.expire = cert.NotAfter.Sub(time.Now())/24 - 1
break
}
return nil
}
}
type GenerateCertificateOptions struct {
keyType KeyType
serialNumber *big.Int
expire time.Duration
isCA bool
parent any
parentKey any
}
type CertificatePkixName struct {
Country string
Province string
Locality string
Organization string
OrganizationalUnit string
StreetAddress string
PostalCode string
SerialNumber string
CommonName string
}
func (pn *CertificatePkixName) Name() pkix.Name {
return pkix.Name{
Country: []string{strings.TrimSpace(pn.Country)},
Organization: []string{strings.TrimSpace(pn.Organization)},
OrganizationalUnit: []string{strings.TrimSpace(pn.OrganizationalUnit)},
Locality: []string{strings.TrimSpace(pn.Locality)},
Province: []string{strings.TrimSpace(pn.Province)},
StreetAddress: []string{strings.TrimSpace(pn.StreetAddress)},
PostalCode: []string{strings.TrimSpace(pn.PostalCode)},
SerialNumber: strings.TrimSpace(pn.SerialNumber),
CommonName: strings.TrimSpace(pn.CommonName),
Names: nil,
ExtraNames: nil,
}
}
type CertificateConfig struct {
Issuer *CertificatePkixName
Subject *CertificatePkixName
IPs []string
Emails []string
DNSNames []string
}
var defaultPkixName = &CertificatePkixName{
Country: "CN",
Province: "",
Organization: "FNS",
OrganizationalUnit: "",
StreetAddress: "",
PostalCode: "",
SerialNumber: "",
CommonName: "AFSSL",
}
func GenerateCertificate(config CertificateConfig, opts ...GenerateCertificateOption) (certPEM []byte, keyPEM []byte, err error) {
// SN
serialNumber, randSNErr := rand.Int(rand.Reader, new(big.Int).Lsh(big.NewInt(1), 128))
if randSNErr != nil {
err = fmt.Errorf("afssl: generate certificate failed, rand serial number failed, %v", randSNErr)
return
}
// OPT
opt := &GenerateCertificateOptions{
keyType: ECDSA(),
serialNumber: serialNumber,
expire: 365 * 24 * time.Hour,
isCA: false,
parent: nil,
parentKey: nil,
}
if opts != nil {
for _, option := range opts {
optErr := option(opt)
if optErr != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", optErr)
return
}
}
}
if opt.expire < 1 {
err = fmt.Errorf("afssl: generate certificate failed, invalid expire days")
return
}
// KEY
var key any
var isGM bool
var signatureAlgorithm int
var pub any
switch opt.keyType.Name() {
case rsaKeyTypeName:
kt := opt.keyType.(*rsaKeyType)
key, err = rsa.GenerateKey(rand.Reader, kt.keyBits)
if err != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", err)
return
}
signatureAlgorithm = int(x509.SHA256WithRSA)
pub = &(key.(*rsa.PrivateKey).PublicKey)
break
case ecdsaKeyTypeName:
kt := opt.keyType.(*ecdsaKeyType)
key, err = ecdsa.GenerateKey(kt.curve, rand.Reader)
if err != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", err)
return
}
signatureAlgorithm = int(x509.ECDSAWithSHA256)
pub = &(key.(*ecdsa.PrivateKey).PublicKey)
break
case ed25519KeyTypeName:
kt := opt.keyType.(*ed25519KeyType)
if len(kt.seed) == 0 {
_, key, err = ed25519.GenerateKey(rand.Reader)
if err != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", err)
return
}
} else {
key = ed25519.NewKeyFromSeed(kt.seed)
}
signatureAlgorithm = int(x509.PureEd25519)
pub = key.(*ed25519.PrivateKey).Public()
break
case sm2KeyTypeName:
key, err = sm2.GenerateKey(rand.Reader)
if err != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", err)
return
}
isGM = true
signatureAlgorithm = int(smx509.SM2WithSM3)
pub = &(key.(*sm2.PrivateKey).PublicKey)
break
default:
err = fmt.Errorf("afssl: generate certificate failed, key type is not supported")
return
}
var keyDER []byte
if isGM {
keyDER, err = smx509.MarshalPKCS8PrivateKey(key)
if err != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", err)
return
}
} else {
keyDER, err = x509.MarshalPKCS8PrivateKey(key)
if err != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", err)
return
}
}
issuer := defaultPkixName
if config.Issuer != nil {
issuer = config.Issuer
}
subject := defaultPkixName
if config.Subject != nil {
subject = config.Subject
}
// CERT
ips := make([]net.IP, 0, 1)
if config.IPs != nil {
for _, e := range config.IPs {
if ip := net.ParseIP(e); ip != nil {
ips = append(ips, ip)
}
}
}
basicConstraintsValid := false
ku := x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature
if opt.isCA {
ku = ku | x509.KeyUsageCertSign
basicConstraintsValid = true
}
var certDER []byte
if isGM {
cert := &smx509.Certificate{
Signature: nil,
SignatureAlgorithm: x509.SignatureAlgorithm(signatureAlgorithm),
PublicKey: pub,
Version: 0,
SerialNumber: serialNumber,
Issuer: issuer.Name(),
Subject: subject.Name(),
NotBefore: time.Now().Add(-24 * time.Hour),
NotAfter: time.Now().Add(opt.expire),
KeyUsage: ku,
Extensions: []pkix.Extension{},
ExtraExtensions: []pkix.Extension{},
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
UnknownExtKeyUsage: nil,
BasicConstraintsValid: basicConstraintsValid,
IsCA: opt.isCA,
DNSNames: config.DNSNames,
EmailAddresses: config.Emails,
IPAddresses: ips,
}
parent := cert
parentKey := key
if opt.parent != nil {
parent = opt.parent.(*smx509.Certificate)
parentKey = opt.parentKey
}
certDER, err = smx509.CreateCertificate(rand.Reader, cert, parent, pub, parentKey)
if err != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", err)
return
}
} else {
cert := &x509.Certificate{
Signature: nil,
SignatureAlgorithm: x509.SignatureAlgorithm(signatureAlgorithm),
PublicKey: pub,
Version: 0,
SerialNumber: serialNumber,
Issuer: issuer.Name(),
Subject: subject.Name(),
NotBefore: time.Now().Add(-24 * time.Hour),
NotAfter: time.Now().Add(opt.expire),
KeyUsage: ku,
Extensions: []pkix.Extension{},
//ExtraExtensions: []pkix.Extension{{
// Id: asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 44363, 44},
// Critical: false,
// Value: []byte{0x05, 0x00}, // ASN.1 NULL
//}},
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
UnknownExtKeyUsage: nil,
BasicConstraintsValid: basicConstraintsValid,
IsCA: opt.isCA,
DNSNames: config.DNSNames,
EmailAddresses: config.Emails,
IPAddresses: ips,
}
parent := cert
parentKey := key
if opt.parent != nil {
parent = opt.parent.(*x509.Certificate)
parentKey = opt.parentKey
}
certDER, err = x509.CreateCertificate(rand.Reader, cert, parent, pub, parentKey)
if err != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", err)
return
}
}
// PEM
certPEM = pem.EncodeToMemory(&pem.Block{
Type: "CERTIFICATE",
Bytes: certDER,
})
keyPEM = pem.EncodeToMemory(&pem.Block{
Type: "PRIVATE KEY",
Bytes: keyDER,
})
// verify
if isGM {
_, err = tlcp.X509KeyPair(certPEM, keyPEM)
} else {
_, err = tls.X509KeyPair(certPEM, keyPEM)
}
if err != nil {
err = fmt.Errorf("afssl: generate certificate failed, %v", err)
return
}
return
}