79 lines
1.9 KiB
Go
79 lines
1.9 KiB
Go
package core
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/tls"
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"crypto/x509"
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"crypto/x509/pkix"
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"fmt"
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"io/ioutil"
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"math/big"
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"time"
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"github.com/kgretzky/pwndrop/utils"
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)
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func GenerateTLSCertificate(common string) (*tls.Certificate, error) {
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private_key, err := rsa.GenerateKey(rand.Reader, 2048)
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if err != nil {
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return nil, err
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}
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notBefore := time.Now()
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aYear := time.Duration(10*365*24) * time.Hour
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notAfter := notBefore.Add(aYear)
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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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if common == "" {
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common = utils.GenRandomString(8)
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}
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template := x509.Certificate{
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SerialNumber: serialNumber,
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Subject: pkix.Name{
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Country: []string{},
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Locality: []string{},
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Organization: []string{},
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OrganizationalUnit: []string{},
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CommonName: common,
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},
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NotBefore: notBefore,
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NotAfter: notAfter,
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KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
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BasicConstraintsValid: true,
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IsCA: false,
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}
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cert, err := x509.CreateCertificate(rand.Reader, &template, &template, &private_key.PublicKey, private_key)
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if err != nil {
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return nil, err
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}
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ret_tls := &tls.Certificate{
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Certificate: [][]byte{cert},
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PrivateKey: private_key,
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}
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return ret_tls, nil
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}
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func LoadTLSCertificate(pub_path string, pkey_path string) (*tls.Certificate, error) {
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pkey, err := ioutil.ReadFile(pkey_path)
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if err != nil {
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return nil, fmt.Errorf("TLS private key not found at: %s", pkey_path)
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}
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pubkey, err := ioutil.ReadFile(pub_path)
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if err != nil {
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return nil, fmt.Errorf("TLS public key not found at: %s", pub_path)
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}
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cert, err := tls.X509KeyPair(pubkey, pkey)
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if err != nil {
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return nil, err
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}
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return &cert, nil
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}
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