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| @@ -0,0 +1,124 @@ | ||
| // Copyright (c) 2021-2024 MinIO, Inc. | ||
| // | ||
| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Affero General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Affero General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Affero General Public License | ||
| // along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "crypto/ecdsa" | ||
| "crypto/elliptic" | ||
| crand "crypto/rand" | ||
| "crypto/rsa" | ||
| "crypto/x509" | ||
| "crypto/x509/pkix" | ||
| "encoding/pem" | ||
| "fmt" | ||
| "math/big" | ||
| "net" | ||
| "os" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| // generateTLSCertKey creates valid key/cert with registered DNS or IP address | ||
| // depending on the passed parameter. That way, we can use tls config without | ||
| // passing InsecureSkipVerify flag. This code is a simplified version of | ||
| // https://golang.org/src/crypto/tls/generate_cert.go | ||
| func generateTLSCertKey(host string) ([]byte, []byte, error) { | ||
| validFor := 365 * 24 * time.Hour | ||
| if len(host) == 0 { | ||
| return nil, nil, fmt.Errorf("Missing host parameter") | ||
| } | ||
|
|
||
| publicKey := func(priv interface{}) interface{} { | ||
| switch k := priv.(type) { | ||
| case *rsa.PrivateKey: | ||
| return &k.PublicKey | ||
| case *ecdsa.PrivateKey: | ||
| return &k.PublicKey | ||
| default: | ||
| return nil | ||
| } | ||
| } | ||
|
|
||
| pemBlockForKey := func(priv interface{}) *pem.Block { | ||
| switch k := priv.(type) { | ||
| case *rsa.PrivateKey: | ||
| return &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(k)} | ||
| case *ecdsa.PrivateKey: | ||
| b, err := x509.MarshalECPrivateKey(k) | ||
| if err != nil { | ||
| fmt.Fprintf(os.Stderr, "Unable to marshal ECDSA private key: %v", err) | ||
| os.Exit(2) | ||
| } | ||
| return &pem.Block{Type: "EC PRIVATE KEY", Bytes: b} | ||
| default: | ||
| return nil | ||
| } | ||
| } | ||
|
|
||
| var priv interface{} | ||
| var err error | ||
| priv, err = ecdsa.GenerateKey(elliptic.P256(), crand.Reader) | ||
| if err != nil { | ||
| return nil, nil, fmt.Errorf("failed to generate private key: %w", err) | ||
| } | ||
| notBefore := time.Now() | ||
| notAfter := notBefore.Add(validFor) | ||
|
|
||
| serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128) | ||
| serialNumber, err := crand.Int(crand.Reader, serialNumberLimit) | ||
| if err != nil { | ||
| return nil, nil, fmt.Errorf("failed to generate serial number: %w", err) | ||
| } | ||
|
|
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| template := x509.Certificate{ | ||
| SerialNumber: serialNumber, | ||
| Subject: pkix.Name{ | ||
| Organization: []string{"Acme Co"}, | ||
| }, | ||
| NotBefore: notBefore, | ||
| NotAfter: notAfter, | ||
|
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| KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature, | ||
| ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth}, | ||
| BasicConstraintsValid: true, | ||
| } | ||
|
|
||
| hosts := strings.Split(host, ",") | ||
| for _, h := range hosts { | ||
| if ip := net.ParseIP(h); ip != nil { | ||
| template.IPAddresses = append(template.IPAddresses, ip) | ||
| } else { | ||
| template.DNSNames = append(template.DNSNames, h) | ||
| } | ||
| } | ||
|
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||
| template.IsCA = true | ||
| template.KeyUsage |= x509.KeyUsageCertSign | ||
|
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| derBytes, err := x509.CreateCertificate(crand.Reader, &template, &template, publicKey(priv), priv) | ||
| if err != nil { | ||
| return nil, nil, fmt.Errorf("Failed to create certificate: %w", err) | ||
| } | ||
|
|
||
| certOut := bytes.NewBuffer([]byte{}) | ||
| pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}) | ||
|
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| keyOut := bytes.NewBuffer([]byte{}) | ||
| pem.Encode(keyOut, pemBlockForKey(priv)) | ||
|
|
||
| return certOut.Bytes(), keyOut.Bytes(), nil | ||
| } |