81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
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package cmd
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import (
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"bytes"
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"crypto/x509/pkix"
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"encoding/pem"
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"log"
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"math/big"
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"os"
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"time"
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)
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func generateCert() {
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ca := &x509.Certificate{
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SerialNumber: big.NewInt(2024),
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Subject: pkix.Name{
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Organization: []string{"Company, INC."},
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Country: []string{"US"},
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Province: []string{""},
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Locality: []string{"San Francisco sucks"},
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StreetAddress: []string{"Golden Gate Bridge"},
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PostalCode: []string{"94016"},
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},
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NotBefore: time.Now(),
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NotAfter: time.Now().AddDate(10, 0, 0),
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IsCA: true,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
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KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
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BasicConstraintsValid: true,
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}
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caPrivKey, err := rsa.GenerateKey(rand.Reader, 3072)
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if err != nil {
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log.Fatalf("Error happened generating private key: %v\n", err)
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}
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caBytes, err := x509.CreateCertificate(rand.Reader, ca, ca, &caPrivKey.PublicKey, caPrivKey)
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if err != nil {
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log.Fatalf("Error happened creating certificate: %v\n", err)
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}
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//////
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key, err := os.OpenFile("./server.key", os.O_WRONLY|os.O_CREATE, 0600)
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if err != nil {
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log.Fatalf("Error happened opening file: %v\n", err)
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}
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defer key.Close()
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cert, err := os.OpenFile("./server.crt", os.O_WRONLY|os.O_CREATE, 0600)
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if err != nil {
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log.Fatalf("Error happened opening file: %v\n", err)
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}
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defer cert.Close()
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//////
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caPEM := new(bytes.Buffer)
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pem.Encode(caPEM, &pem.Block{
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Type: "CERTIFICATE",
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Bytes: caBytes,
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})
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caPrivKeyPEM := new(bytes.Buffer)
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pem.Encode(caPrivKeyPEM, &pem.Block{
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Type: "RSA PRIVATE KEY",
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Bytes: x509.MarshalPKCS1PrivateKey(caPrivKey),
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})
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// readCert, err := io.ReadAll(caPEM)
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// if err != nil {
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// log.Fatalf("Error happened preparing to write cert: %v\n", err)
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// }
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cert.WriteString(string(caPEM.Bytes()))
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// readKey, err := io.ReadAll(caPrivKeyPEM)
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// if err != nil {
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// log.Fatalf("Error happened preparing to write key: %v\n", err)
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// }
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key.WriteString(string(caPrivKeyPEM.Bytes()))
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}
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