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chore(pkg/server): implement automatic generation of self-signed HTTP…
…S certificate - add --auto-cert flag to enable automatic HTTPS certificate generation; - properly initialize client used by grpc-gateway when TLS is used. Signed-off-by: Stefano Scafiti <stefano.scafiti96@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| /* | ||
| Copyright 2024 Codenotary Inc. All rights reserved. | ||
| SPDX-License-Identifier: BUSL-1.1 | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| https://mariadb.com/bsl11/ | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package cert | ||
|
|
||
| import ( | ||
| "crypto/rand" | ||
| "crypto/rsa" | ||
| "crypto/x509" | ||
| "crypto/x509/pkix" | ||
| "encoding/pem" | ||
| "fmt" | ||
| "math/big" | ||
| "net" | ||
| "os" | ||
| "path" | ||
| "time" | ||
| ) | ||
|
|
||
| func GenerateSelfSignedCert(certPath, keyPath string, org string, expiration time.Duration) error { | ||
| priv, err := rsa.GenerateKey(rand.Reader, 2048) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to generate RSA key: %w", err) | ||
| } | ||
|
|
||
| notBefore := time.Now() | ||
| notAfter := notBefore.Add(expiration) | ||
|
|
||
| serialNumber, err := rand.Int(rand.Reader, new(big.Int).Lsh(big.NewInt(1), 128)) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to generate serial number: %w", err) | ||
| } | ||
|
|
||
| hostname, err := os.Hostname() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| ips, err := listIPs() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| ips = append(ips, net.ParseIP("0.0.0.0")) | ||
|
|
||
| issuerOrSubject := pkix.Name{ | ||
| Organization: []string{org}, | ||
| } | ||
|
|
||
| template := x509.Certificate{ | ||
| Issuer: issuerOrSubject, | ||
| SerialNumber: serialNumber, | ||
| Subject: issuerOrSubject, | ||
| DNSNames: []string{"localhost", hostname}, | ||
| NotBefore: notBefore, | ||
| NotAfter: notAfter, | ||
| IPAddresses: ips, | ||
| KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature, | ||
| ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth}, | ||
| } | ||
|
|
||
| certBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &priv.PublicKey, priv) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to create certificate: %w", err) | ||
| } | ||
|
|
||
| if err := os.MkdirAll(path.Dir(certPath), 0755); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| certBytesPem := encodePEM(certBytes, "CERTIFICATE") | ||
| if err := os.WriteFile(certPath, certBytesPem, 0644); err != nil { | ||
| return fmt.Errorf("failed to write cert file: %w", err) | ||
| } | ||
|
|
||
| privBytes := x509.MarshalPKCS1PrivateKey(priv) | ||
| privBytesPem := encodePEM(privBytes, "PRIVATE KEY") | ||
|
|
||
| if err := os.WriteFile(keyPath, privBytesPem, 0600); err != nil { | ||
| return fmt.Errorf("failed to write key file: %w", err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func encodePEM(data []byte, blockType string) []byte { | ||
| block := &pem.Block{ | ||
| Type: blockType, | ||
| Bytes: data, | ||
| } | ||
| return pem.EncodeToMemory(block) | ||
| } | ||
|
|
||
| func listIPs() ([]net.IP, error) { | ||
| addresses, err := net.InterfaceAddrs() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| ips := make([]net.IP, 0, len(addresses)) | ||
| for _, addr := range addresses { | ||
| ipNet, ok := addr.(*net.IPNet) | ||
| if ok { | ||
| ips = append(ips, ipNet.IP) | ||
| } | ||
| } | ||
| return ips, nil | ||
| } |
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