117 lines
3.2 KiB
Go
117 lines
3.2 KiB
Go
package server
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import (
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/tls"
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"crypto/x509"
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"crypto/x509/pkix"
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"encoding/pem"
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"math/big"
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"net"
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"time"
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"github.com/ethereum/go-ethereum/log"
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"github.com/status-im/status-go/timesource"
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)
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var globalMediaCertificate *tls.Certificate = nil
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var globalMediaPem string
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func makeRandomSerialNumber() (*big.Int, error) {
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serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
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return rand.Int(rand.Reader, serialNumberLimit)
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}
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func GenerateX509Cert(sn *big.Int, from, to time.Time, IPAddresses []net.IP, DNSNames []string) *x509.Certificate {
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return &x509.Certificate{
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SerialNumber: sn,
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Subject: pkix.Name{Organization: []string{"Self-signed cert"}},
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NotBefore: from,
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NotAfter: to,
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KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
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BasicConstraintsValid: true,
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IsCA: true,
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IPAddresses: IPAddresses,
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DNSNames: DNSNames,
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}
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}
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func GenerateX509PEMs(cert *x509.Certificate, key *ecdsa.PrivateKey) (certPem, keyPem []byte, err error) {
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derBytes, err := x509.CreateCertificate(rand.Reader, cert, cert, &key.PublicKey, key)
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if err != nil {
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return
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}
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certPem = pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
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privBytes, err := x509.MarshalPKCS8PrivateKey(key)
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if err != nil {
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return
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}
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keyPem = pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: privBytes})
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return
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}
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func GenerateTLSCert(notBefore, notAfter time.Time, IPAddresses []net.IP, DNSNames []string) (*tls.Certificate, []byte, error) {
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priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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if err != nil {
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return nil, nil, err
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}
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sn, err := makeRandomSerialNumber()
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if err != nil {
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return nil, nil, err
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}
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cert := GenerateX509Cert(sn, notBefore, notAfter, IPAddresses, DNSNames)
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certPem, keyPem, err := GenerateX509PEMs(cert, priv)
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if err != nil {
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return nil, nil, err
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}
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finalCert, err := tls.X509KeyPair(certPem, keyPem)
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return &finalCert, certPem, err
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}
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func generateMediaTLSCert() error {
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if globalMediaCertificate != nil {
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return nil
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}
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notBefore := timesource.GetCurrentTime()
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notAfter := notBefore.Add(365 * 24 * time.Hour)
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log.Debug("generate media cert", "system time", time.Now().String(), "cert notBefore", notBefore.String(), "cert notAfter", notAfter.String())
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finalCert, certPem, err := GenerateTLSCert(notBefore, notAfter, []net.IP{}, []string{Localhost})
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if err != nil {
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return err
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}
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globalMediaCertificate = finalCert
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globalMediaPem = string(certPem)
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return nil
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}
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func PublicMediaTLSCert() (string, error) {
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err := generateMediaTLSCert()
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if err != nil {
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return "", err
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}
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return globalMediaPem, nil
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}
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// ToECDSA takes a []byte of D and uses it to create an ecdsa.PublicKey on the elliptic.P256 curve
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// this function is basically a P256 curve version of eth-node/crypto.ToECDSA without all the nice validation
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func ToECDSA(d []byte) *ecdsa.PrivateKey {
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k := new(ecdsa.PrivateKey)
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k.D = new(big.Int).SetBytes(d)
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k.PublicKey.Curve = elliptic.P256()
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k.PublicKey.X, k.PublicKey.Y = k.PublicKey.Curve.ScalarBaseMult(d)
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return k
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}
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