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keystore.go
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keystore.go
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package secrets
import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"io"
"math"
"math/big"
"time"
"github.com/pavlo-v-chernykh/keystore-go/v4"
)
func GenerateKeystore(
storepass,
keypass,
alias,
cname string,
validity time.Duration,
bits uint32,
writer io.Writer,
) error {
// Generate private key
key, err := rsa.GenerateKey(rand.Reader, int(bits))
if err != nil {
return err
}
rawKey, err := x509.MarshalPKCS8PrivateKey(key)
if err != nil {
return err
}
// Generate certificate
serialNumber, err := rand.Int(rand.Reader, big.NewInt(math.MaxInt64))
if err != nil {
return err
}
now := time.Now()
tpl := &x509.Certificate{
SerialNumber: serialNumber,
NotBefore: now,
NotAfter: now.Add(validity),
Subject: pkix.Name{
CommonName: cname,
},
Issuer: pkix.Name{
CommonName: cname,
},
}
cert, err := x509.CreateCertificate(rand.Reader, tpl, tpl, &key.PublicKey, key)
if err != nil {
return err
}
// Generate & write keystore
ks := keystore.New()
if err := ks.SetPrivateKeyEntry(
alias,
keystore.PrivateKeyEntry{
CreationTime: time.Now(),
PrivateKey: rawKey,
CertificateChain: []keystore.Certificate{
{
Type: "X509",
Content: cert,
},
},
},
[]byte(keypass),
); err != nil {
return err
}
return ks.Store(writer, []byte(storepass))
}