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mkcert-cache.go
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mkcert-cache.go
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package providers
import (
"crypto/md5"
"encoding/hex"
"fmt"
"net/url"
"os"
"path/filepath"
"sort"
"strings"
"sync"
"github.com/pydio/cells/common/config"
"github.com/pydio/cells/common/proto/install"
"github.com/pydio/cells/common/utils/net"
)
var cache *MkCertCache
func init() {
cache = &MkCertCache{
data: make(map[string]*pair),
lock: &sync.Mutex{},
}
}
type pair struct {
cert string
key string
}
type MkCertCache struct {
lock *sync.Mutex
data map[string]*pair
}
func GetMkCertCache() *MkCertCache {
return cache
}
func (m *MkCertCache) Uuid(hosts []string) string {
sort.Strings(hosts)
hh := strings.Join(hosts, "##")
hash := md5.New()
hash.Write([]byte(hh))
return hex.EncodeToString(hash.Sum(nil))
}
func (m *MkCertCache) LoadCertificates(config *install.ProxyConfig) (certFile string, keyFile string, err error) {
hosts := m.loadHosts(config)
uuid := cache.Uuid(hosts)
cache.lock.Lock()
defer cache.lock.Unlock()
if p, o := cache.data[uuid]; o {
return p.cert, p.key, nil
} else {
certFile, keyFile, err = cache.findOrGenerate(uuid, hosts)
if err == nil {
cache.data[uuid] = &pair{cert: certFile, key: keyFile}
}
return
}
}
func (m *MkCertCache) loadHosts(site *install.ProxyConfig) []string {
hns := site.GetSelfSigned().GetHostnames()
if len(hns) == 0 {
bindAll := false
// get hosts from default
for _, bind := range site.Binds {
u, err := url.Parse("https://" + bind)
if err != nil {
continue
}
bindHost := u.Hostname()
if bindHost == "0.0.0.0" || bindHost == "" {
bindAll = true
} else {
hns = append(hns, bindHost)
}
}
if bindAll {
// Special case for 0.0.0.0 => use all interfaces and external
ii, _ := net.GetAvailableIPs()
for _, i := range ii {
hns = append(hns, i.String())
}
if other, e := net.HostsFileLookup(); e == nil && len(other) > 0 {
hns = append(hns, other...)
}
}
}
return hns
}
func (m *MkCertCache) findOrGenerate(uuid string, hns []string) (certFile, keyFile string, err error) {
storageLocation := filepath.Join(config.ApplicationWorkingDir(), "certs")
os.MkdirAll(storageLocation, 0700)
mk := NewMkCert(storageLocation)
cn := filepath.Join(storageLocation, uuid+".pem")
kn := filepath.Join(storageLocation, uuid+"-key.pem")
_, e1 := os.Stat(cn)
_, e2 := os.Stat(kn)
if e1 == nil && e2 == nil {
certFile = cn
keyFile = kn
return
}
err = mk.MakeCert(hns, uuid)
if err != nil {
return
}
certFile, keyFile, _, _ = mk.GeneratedResources()
fmt.Println("")
fmt.Println("")
fmt.Println("👉 If you are behind a reverse proxy, you can either install the RootCA on the proxy machine " +
"trust store, or configure your proxy to `insecure_skip_verify` for pointing to Cells.")
fmt.Println("👉 If you are developing locally, you may install the RootCA in your system trust store to " +
"see a green light in your browser!")
fmt.Println("🗒 To easily install the RootCA in your trust store, use https://github.com/FiloSottile/mkcert. " +
"Set the $CAROOT environment variable to the rootCA folder then use 'mkcert -install'")
fmt.Println("")
return
}