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Signed-off-by: Dmitry S <[email protected]>
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| // Copyright 2023 The Sigstore Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // 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. | ||
|
|
||
| // code is based on the snippet https://gist.github.com/shaneutt/5e1995295cff6721c89a71d13a71c251 | ||
| // with a permissive (Public Domain) License. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "crypto/rand" | ||
| "crypto/rsa" | ||
| "crypto/x509" | ||
| "crypto/x509/pkix" | ||
| "encoding/pem" | ||
| "log" | ||
| "math/big" | ||
| "net" | ||
| "os" | ||
| "time" | ||
| ) | ||
|
|
||
| func main() { | ||
| // set up our CA certificate | ||
| ca := &x509.Certificate{ | ||
| SerialNumber: big.NewInt(2019), | ||
| Subject: pkix.Name{ | ||
| Organization: []string{"CA Company, INC."}, | ||
| Country: []string{"US"}, | ||
| Province: []string{""}, | ||
| Locality: []string{"San Francisco"}, | ||
| StreetAddress: []string{"Golden Gate Bridge"}, | ||
| PostalCode: []string{"94016"}, | ||
| }, | ||
| NotBefore: time.Now(), | ||
| NotAfter: time.Now().AddDate(10, 0, 0), | ||
| IsCA: true, | ||
| ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageCodeSigning /*, x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth */}, | ||
| KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign, | ||
| BasicConstraintsValid: true, | ||
| EmailAddresses: []string{"[email protected]"}, | ||
| } | ||
|
|
||
| // create our private and public key | ||
| caPrivKey, err := rsa.GenerateKey(rand.Reader, 4096) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| // create the CA | ||
| caBytes, err := x509.CreateCertificate(rand.Reader, ca, ca, &caPrivKey.PublicKey, caPrivKey) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| // pem encode | ||
| caCertFile, err := os.OpenFile("cacert.pem", os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644) | ||
| if err != nil { | ||
| log.Fatalf("unable to write to cacert.pem: %v", err) | ||
| } | ||
| err = pem.Encode(caCertFile, &pem.Block{ | ||
| Type: "CERTIFICATE", | ||
| Bytes: caBytes, | ||
| }) | ||
| if err != nil { | ||
| log.Fatalf("unable to write to cacert.pem: %v", err) | ||
| } | ||
|
|
||
| caPrivKeyFile, err := os.OpenFile("ca-key.pem", os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0400) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| defer caPrivKeyFile.Close() | ||
| err = pem.Encode(caPrivKeyFile, &pem.Block{ | ||
| Type: "RSA PRIVATE KEY", | ||
| Bytes: x509.MarshalPKCS1PrivateKey(caPrivKey), | ||
| }) | ||
| if err != nil { | ||
| log.Fatalf("unable to create to ca-key.pem: %v", err) //nolint:gocritic | ||
| } | ||
|
|
||
| // set up our server certificate | ||
| cert := &x509.Certificate{ | ||
| SerialNumber: big.NewInt(2019), | ||
| Subject: pkix.Name{ | ||
| Organization: []string{"Company, INC."}, | ||
| Country: []string{"US"}, | ||
| Province: []string{""}, | ||
| Locality: []string{"San Francisco"}, | ||
| StreetAddress: []string{"Golden Gate Bridge"}, | ||
| PostalCode: []string{"94016"}, | ||
| }, | ||
| IPAddresses: []net.IP{net.IPv4(127, 0, 0, 1), net.IPv6loopback}, | ||
| NotBefore: time.Now(), | ||
| NotAfter: time.Now().AddDate(10, 0, 0), | ||
| SubjectKeyId: []byte{1, 2, 3, 4, 6}, | ||
| ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageCodeSigning /* x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth */}, | ||
| KeyUsage: x509.KeyUsageDigitalSignature, | ||
| EmailAddresses: []string{"[email protected]"}, | ||
| DNSNames: []string{"next.hugeunicorn.xyz"}, | ||
| } | ||
|
|
||
| certPrivKey, err := rsa.GenerateKey(rand.Reader, 4096) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| certBytes, err := x509.CreateCertificate(rand.Reader, cert, ca, &certPrivKey.PublicKey, caPrivKey) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| certFile, err := os.OpenFile("cert.pem", os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| defer certFile.Close() | ||
| err = pem.Encode(certFile, &pem.Block{ | ||
| Type: "CERTIFICATE", | ||
| Bytes: certBytes, | ||
| }) | ||
| if err != nil { | ||
| log.Fatalf("failed to encode cert: %v", err) | ||
| } | ||
|
|
||
| keyFile, err := os.OpenFile("key.pem", os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0400) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| defer keyFile.Close() | ||
| err = pem.Encode(keyFile, &pem.Block{ | ||
| Type: "RSA PRIVATE KEY", | ||
| Bytes: x509.MarshalPKCS1PrivateKey(certPrivKey), | ||
| }) | ||
| if err != nil { | ||
| log.Fatalf("failed to encode private key: %v", err) | ||
| } | ||
| } |
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