51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
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package server
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import (
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"crypto/ecdsa"
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"crypto/rand"
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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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"time"
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)
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func GenerateX509Cert(from, to time.Time) (*x509.Certificate, error) {
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serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
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serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
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if err != nil {
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return nil, err
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}
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template := &x509.Certificate{
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SerialNumber: serialNumber,
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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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DNSNames: []string{"localhost"},
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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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}
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return template, nil
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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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