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package utils
import (
"context"
"crypto/rand"
"crypto/rsa"
"net"
"os"
"path/filepath"
"time"
"github.com/ansible/receptor/pkg/certificates"
)
// GenerateCA generates a CA certificate and key.
func GenerateCA(name, commonName string) (string, string, error) {
dir, err := os.MkdirTemp("", "")
if err != nil {
return "", "", err
}
keyPath := filepath.Join(dir, name+".key")
crtPath := filepath.Join(dir, name+".crt")
// Create our certificate and private key
CA, err := certificates.CreateCA(&certificates.CertOptions{CommonName: commonName, Bits: 2048}, &certificates.RsaWrapper{})
if err != nil {
return "", "", err
}
err = certificates.SaveToPEMFile(crtPath, []interface{}{CA.Certificate}, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
err = certificates.SaveToPEMFile(keyPath, []interface{}{CA.PrivateKey}, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
return keyPath, crtPath, nil
}
// GenerateCert generates a private and public key for testing in the directory specified.
func GenerateCert(name, commonName string, dnsNames, nodeIDs []string) (string, string, error) {
dir, err := os.MkdirTemp("", "")
if err != nil {
return "", "", err
}
keyPath := filepath.Join(dir, name+".key")
crtPath := filepath.Join(dir, name+".crt")
// Create a temporary CA to sign this certificate
CA, err := certificates.CreateCA(&certificates.CertOptions{CommonName: "temp ca", Bits: 2048}, &certificates.RsaWrapper{})
if err != nil {
return "", "", err
}
// Create certificate request
req, key, err := certificates.CreateCertReqWithKey(&certificates.CertOptions{
CommonName: commonName,
Bits: 2048,
CertNames: certificates.CertNames{
DNSNames: dnsNames,
NodeIDs: nodeIDs,
},
})
if err != nil {
return "", "", err
}
// Sign the certificate
cert, err := certificates.SignCertReq(req, CA, &certificates.CertOptions{})
if err != nil {
return "", "", err
}
// Save cert and key to files
err = certificates.SaveToPEMFile(crtPath, []interface{}{cert}, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
err = certificates.SaveToPEMFile(keyPath, []interface{}{key}, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
return keyPath, crtPath, nil
}
// GenerateCertWithCA generates a private and public key for testing in the directory
// specified using the ca specified.
func GenerateCertWithCA(name, caKeyPath, caCrtPath, commonName string, dnsNames, nodeIDs []string) (string, string, error) {
dir, err := os.MkdirTemp("", "")
if err != nil {
return "", "", err
}
CA := &certificates.CA{}
CA.Certificate, err = certificates.LoadCertificate(caCrtPath, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
CA.PrivateKey, err = certificates.LoadPrivateKey(caKeyPath, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
keyPath := filepath.Join(dir, name+".key")
crtPath := filepath.Join(dir, name+".crt")
// Create certificate request
req, key, err := certificates.CreateCertReqWithKey(&certificates.CertOptions{
CommonName: commonName,
Bits: 2048,
CertNames: certificates.CertNames{
DNSNames: dnsNames,
NodeIDs: nodeIDs,
},
})
if err != nil {
return "", "", err
}
// Sign the certificate
cert, err := certificates.SignCertReq(req, CA, &certificates.CertOptions{})
if err != nil {
return "", "", err
}
// Save cert and key to files
err = certificates.SaveToPEMFile(crtPath, []interface{}{cert}, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
err = certificates.SaveToPEMFile(keyPath, []interface{}{key}, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
return keyPath, crtPath, nil
}
func GenerateRSAPair() (string, string, error) {
dir, err := os.MkdirTemp("", "")
if err != nil {
return "", "", err
}
privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
return "", "", err
}
publicKey := &privateKey.PublicKey
privateKeyPath := filepath.Join(dir, "private.pem")
err = certificates.SaveToPEMFile(privateKeyPath, []interface{}{privateKey}, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
publicKeyPath := filepath.Join(dir, "public.pem")
err = certificates.SaveToPEMFile(publicKeyPath, []interface{}{publicKey}, &certificates.OsWrapper{})
if err != nil {
return "", "", err
}
return privateKeyPath, publicKeyPath, nil
}
// CheckUntilTimeout Polls the check function until the context expires, in
// which case it returns false.
func CheckUntilTimeout(ctx context.Context, interval time.Duration, check func() bool) bool {
for ready := check(); !ready; ready = check() {
if ctx.Err() != nil {
return false
}
time.Sleep(interval)
}
return true
}
// CheckUntilTimeoutWithErr does the same as CheckUntilTimeout but requires the
// check function returns (bool, error), and will return an error immediately
// if the check function returns an error.
func CheckUntilTimeoutWithErr(ctx context.Context, interval time.Duration, check func() (bool, error)) (bool, error) {
for ready, err := check(); !ready; ready, err = check() {
if err != nil {
return false, err
}
if ctx.Err() != nil {
return false, nil //nolint:nilerr // Make this nice later.
}
time.Sleep(interval)
}
return true, nil
}
func GetFreeTCPPort() (int, error) {
addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
if err != nil {
return 0, err
}
l, err := net.ListenTCP("tcp", addr)
if err != nil {
return 0, err
}
defer l.Close()
return l.Addr().(*net.TCPAddr).Port, nil
}
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