local-server/cmd/dkl-local-server/cluster-render-context.go
2023-12-17 17:29:17 +01:00

186 lines
4.0 KiB
Go

package main
import (
"crypto/rand"
"encoding/base32"
"encoding/json"
"fmt"
"log"
"path"
"strconv"
"strings"
cfsslconfig "github.com/cloudflare/cfssl/config"
"github.com/cloudflare/cfssl/csr"
yaml "gopkg.in/yaml.v2"
"novit.tech/direktil/pkg/bootstrapconfig"
"novit.tech/direktil/pkg/config"
)
func templateFuncs(sslCfg *cfsslconfig.Config) map[string]any {
getKeyCert := func(cluster, caName, name, profile, label, reqJson string) (kc KeyCert, err error) {
certReq := &csr.CertificateRequest{
KeyRequest: csr.NewKeyRequest(),
}
err = json.Unmarshal([]byte(reqJson), certReq)
if err != nil {
log.Print("CSR unmarshal failed on: ", reqJson)
return
}
return getUsableKeyCert(cluster, caName, name, profile, label, certReq, sslCfg)
}
hash := func(plain, seed []byte, hashAlg string) (hashed string, err error) {
switch hashAlg {
case "sha512crypt":
return sha512crypt(plain, seed)
case "bootstrap":
return bootstrapconfig.JoinSeedAndHash(seed, bootstrapconfig.PasswordHashFromSeed(seed, plain)), nil
default:
return "", fmt.Errorf("unknown hash alg: %q", hashAlg)
}
}
return map[string]any{
"quote": strconv.Quote,
"password": func(cluster, name, hashAlg string) (password string, err error) {
key := cluster + "/" + name
seed, err := seeds.GetOrCreate(key, func() (seed []byte, err error) {
seed = make([]byte, 16)
_, err = rand.Read(seed)
return
})
if err != nil {
return "", fmt.Errorf("failed to get seed: %w", err)
}
password, err = clusterPasswords.GetOrCreate(key, func() (password string, err error) {
raw := make([]byte, 10)
_, err = rand.Read(raw)
if err != nil {
return "", fmt.Errorf("failed to generate password: %w", err)
}
password = strings.ToLower(base32.StdEncoding.WithPadding(base32.NoPadding).EncodeToString(raw))
return
})
if err != nil {
return
}
return hash([]byte(password), seed, hashAlg)
},
"token": getOrCreateClusterToken,
"ca_key": func(cluster, name string) (s string, err error) {
ca, err := getUsableClusterCA(cluster, name)
if err != nil {
return
}
s = string(ca.Key)
return
},
"ca_crt": func(cluster, name string) (s string, err error) {
ca, err := getUsableClusterCA(cluster, name)
if err != nil {
return
}
s = string(ca.Cert)
return
},
"ca_dir": func(cluster, name string) (s string, err error) {
ca, err := getUsableClusterCA(cluster, name)
if err != nil {
return
}
dir := "/etc/tls-ca/" + name
return asYaml([]config.FileDef{
{
Path: path.Join(dir, "ca.crt"),
Mode: 0644,
Content: string(ca.Cert),
},
{
Path: path.Join(dir, "ca.key"),
Mode: 0600,
Content: string(ca.Key),
},
})
},
"tls_key": func(cluster, caName, name, profile, label, reqJson string) (s string, err error) {
kc, err := getKeyCert(cluster, caName, name, profile, label, reqJson)
if err != nil {
return
}
s = string(kc.Key)
return
},
"tls_crt": func(cluster, caName, name, profile, label, reqJson string) (s string, err error) {
kc, err := getKeyCert(cluster, caName, name, profile, label, reqJson)
if err != nil {
return
}
s = string(kc.Cert)
return
},
"tls_dir": func(dir, cluster, caName, name, profile, label, reqJson string) (s string, err error) {
ca, err := getUsableClusterCA(cluster, caName)
if err != nil {
return
}
kc, err := getKeyCert(cluster, caName, name, profile, label, reqJson)
if err != nil {
return
}
return asYaml([]config.FileDef{
{
Path: path.Join(dir, "ca.crt"),
Mode: 0644,
Content: string(ca.Cert),
},
{
Path: path.Join(dir, "tls.crt"),
Mode: 0644,
Content: string(kc.Cert),
},
{
Path: path.Join(dir, "tls.key"),
Mode: 0600,
Content: string(kc.Key),
},
})
},
}
}
func asYaml(v interface{}) (string, error) {
ba, err := yaml.Marshal(v)
if err != nil {
return "", err
}
return string(ba), nil
}