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config.go
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config.go
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package main
import (
"bufio"
"bytes"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"errors"
"fmt"
"html/template"
"io/ioutil"
"math/big"
"os"
"path/filepath"
"strings"
"time"
"github.com/Symantec/keymaster/keymasterd/admincache"
"github.com/Symantec/keymaster/lib/pwauth/command"
"github.com/Symantec/keymaster/lib/pwauth/ldap"
"github.com/Symantec/keymaster/lib/vip"
"github.com/howeyc/gopass"
"golang.org/x/crypto/openpgp"
"golang.org/x/crypto/openpgp/armor"
"golang.org/x/crypto/ssh"
"golang.org/x/oauth2"
"gopkg.in/yaml.v2"
)
type baseConfig struct {
HttpAddress string `yaml:"http_address"`
AdminAddress string `yaml:"admin_address"`
TLSCertFilename string `yaml:"tls_cert_filename"`
TLSKeyFilename string `yaml:"tls_key_filename"`
//RequiredAuthForCert string `yaml:"required_auth_for_cert"`
SSHCAFilename string `yaml:"ssh_ca_filename"`
HtpasswdFilename string `yaml:"htpasswd_filename"`
ExternalAuthCmd string `yaml:"external_auth_command"`
ClientCAFilename string `yaml:"client_ca_filename"`
KeymasterPublicKeysFilename string `yaml:"keymaster_public_keys_filename"`
HostIdentity string `yaml:"host_identity"`
KerberosRealm string `yaml:"kerberos_realm"`
DataDirectory string `yaml:"data_directory"`
SharedDataDirectory string `yaml:"shared_data_directory"`
HideStandardLogin bool `yaml:"hide_standard_login"`
AllowedAuthBackendsForCerts []string `yaml:"allowed_auth_backends_for_certs"`
AllowedAuthBackendsForWebUI []string `yaml:"allowed_auth_backends_for_webui"`
AdminUsers []string `yaml:"admin_users"`
AdminGroups []string `yaml:"admin_groups"`
PublicLogs bool `yaml:"public_logs"`
}
type LdapConfig struct {
BindPattern string `yaml:"bind_pattern"`
LDAPTargetURLs string `yaml:"ldap_target_urls"`
DisablePasswordCache bool `yaml:"disable_password_cache"`
}
type UserInfoLDAPSource struct {
BindUsername string `yaml:"bind_username"`
BindPassword string `yaml:"bind_password"`
LDAPTargetURLs string `yaml:"ldap_target_urls"`
UserSearchBaseDNs []string `yaml:"user_search_base_dns"`
UserSearchFilter string `yaml:"user_search_filter"`
GroupSearchBaseDNs []string `yaml:"group_search_base_dns"`
GroupSearchFilter string `yaml:"group_search_filter"`
}
type UserInfoSouces struct {
Ldap UserInfoLDAPSource
}
type Oauth2Config struct {
Config *oauth2.Config
Enabled bool `yaml:"enabled"`
ClientID string `yaml:"client_id"`
ClientSecret string `yaml:"client_secret"`
TokenUrl string `yaml:"token_url"`
AuthUrl string `yaml:"auth_url"`
UserinfoUrl string `yaml:"userinfo_url"`
Scopes string `yaml:"scopes"`
//Todo add allowed orgs...
}
type OpenIDConnectClientConfig struct {
ClientID string `yaml:"client_id"`
ClientSecret string `yaml:"client_secret"`
AllowedRedirectURLRE []string `yaml:"allowed_redirect_url_re"`
}
type OpenIDConnectIDPConfig struct {
DefaultEmailDomain string `yaml:"default_email_domain"`
Client []OpenIDConnectClientConfig `yaml:"clients"`
}
type ProfileStorageConfig struct {
StorageUrl string `yaml:"storage_url"`
TLSRootCertFilename string `yaml:"tls_root_cert_filename"`
}
type SymantecVIPConfig struct {
Client *vip.Client
Enabled bool `yaml:"enabled"`
CertFile string `yaml:"cert_file"`
KeyFile string `yaml:"key_file"`
}
type AppConfigFile struct {
Base baseConfig
Ldap LdapConfig
UserInfo UserInfoSouces `yaml:"userinfo_sources"`
Oauth2 Oauth2Config
OpenIDConnectIDP OpenIDConnectIDPConfig `yaml:"openid_connect_idp"`
SymantecVIP SymantecVIPConfig
ProfileStorage ProfileStorageConfig
}
const defaultRSAKeySize = 3072
func (state *RuntimeState) loadTemplates() (err error) {
//Load extra templates
templatesPath := filepath.Join(state.Config.Base.SharedDataDirectory, "customization_data", "templates")
if _, err = os.Stat(templatesPath); err != nil {
return err
}
state.htmlTemplate = template.New("main")
templateFiles := []string{"footer_extra.tmpl", "header_extra.tmpl", "login_extra.tmpl"}
for _, templateFilename := range templateFiles {
templatePath := filepath.Join(templatesPath, templateFilename)
_, err = state.htmlTemplate.ParseFiles(templatePath)
if err != nil {
return err
}
}
/// Load the oter built in templates
extraTemplates := []string{footerTemplateText, loginFormText, secondFactorAuthFormText, profileHTML, usersHTML, headerTemplateText}
for _, templateString := range extraTemplates {
_, err = state.htmlTemplate.Parse(templateString)
if err != nil {
return err
}
}
return nil
}
func (state *RuntimeState) signerPublicKeyToKeymasterKeys() error {
logger.Debugf(3, "number of pk known=%d", len(state.KeymasterPublicKeys))
signerPKFingerprint, err := getKeyFingerprint(state.Signer.Public())
if err != nil {
return err
}
found := false
for _, key := range state.KeymasterPublicKeys {
fp, err := getKeyFingerprint(key)
if err != nil {
return err
}
if signerPKFingerprint == fp {
found = true
}
}
if !found {
state.KeymasterPublicKeys = append(state.KeymasterPublicKeys, state.Signer.Public())
}
logger.Debugf(3, "number of pk known=%d", len(state.KeymasterPublicKeys))
return nil
}
func loadVerifyConfigFile(configFilename string) (RuntimeState, error) {
var runtimeState RuntimeState
runtimeState.isAdminCache = admincache.New(5 * time.Minute)
if _, err := os.Stat(configFilename); os.IsNotExist(err) {
err = errors.New("mising config file failure")
return runtimeState, err
}
source, err := ioutil.ReadFile(configFilename)
if err != nil {
err = errors.New("cannot read config file")
return runtimeState, err
}
err = yaml.Unmarshal(source, &runtimeState.Config)
if err != nil {
err = errors.New("Cannot parse config file")
return runtimeState, err
}
//share config
//runtimeState.userProfile = make(map[string]userProfile)
runtimeState.pendingOauth2 = make(map[string]pendingAuth2Request)
runtimeState.SignerIsReady = make(chan bool, 1)
runtimeState.localAuthData = make(map[string]localUserData)
runtimeState.vipPushCookie = make(map[string]pushPollTransaction)
//verify config
if len(runtimeState.Config.Base.HostIdentity) > 0 {
runtimeState.HostIdentity = runtimeState.Config.Base.HostIdentity
} else {
runtimeState.HostIdentity, err = getHostIdentity()
if err != nil {
return runtimeState, err
}
}
// TODO: This assumes httpAddress is just the port..
u2fAppID = "https://" + runtimeState.HostIdentity
if runtimeState.Config.Base.HttpAddress != ":443" {
u2fAppID = u2fAppID + runtimeState.Config.Base.HttpAddress
}
u2fTrustedFacets = append(u2fTrustedFacets, u2fAppID)
if len(runtimeState.Config.Base.KerberosRealm) > 0 {
runtimeState.KerberosRealm = &runtimeState.Config.Base.KerberosRealm
}
_, err = exitsAndCanRead(runtimeState.Config.Base.TLSCertFilename, "http cert file")
if err != nil {
return runtimeState, err
}
_, err = exitsAndCanRead(runtimeState.Config.Base.TLSKeyFilename, "http key file")
if err != nil {
return runtimeState, err
}
sshCAFilename := runtimeState.Config.Base.SSHCAFilename
runtimeState.SSHCARawFileContent, err = exitsAndCanRead(sshCAFilename, "ssh CA File")
if err != nil {
logger.Printf("Cannot load ssh CA File")
return runtimeState, err
}
if len(runtimeState.Config.Base.ClientCAFilename) > 0 {
buffer, err := exitsAndCanRead(
runtimeState.Config.Base.ClientCAFilename, "client CA file")
if err != nil {
logger.Printf("Cannot load client CA File")
return runtimeState, err
}
runtimeState.ClientCAPool = x509.NewCertPool()
ok := runtimeState.ClientCAPool.AppendCertsFromPEM(buffer)
if !ok {
err = errors.New("Cannot append any certs from Client CA file")
return runtimeState, err
}
logger.Debugf(3, "client ca file loaded %d ", len(runtimeState.ClientCAPool.Subjects()))
}
if len(runtimeState.Config.Base.KeymasterPublicKeysFilename) > 0 {
filename := runtimeState.Config.Base.KeymasterPublicKeysFilename
if _, err := os.Stat(filename); os.IsNotExist(err) {
logger.Printf("keymaster_public_keys_filename defined but file does not exist")
return runtimeState, err
}
inFile, err := os.Open(filename)
if err != nil {
logger.Printf("keymaster_public_keys_filename cannot be opened")
return runtimeState, err
}
defer inFile.Close()
scanner := bufio.NewScanner(inFile)
scanner.Split(bufio.ScanLines)
for scanner.Scan() {
logger.Debugf(2, "line='%s'", scanner.Text())
userPubKey := scanner.Text()
sshPubKey, _, _, _, err := ssh.ParseAuthorizedKey([]byte(userPubKey))
if err != nil {
return runtimeState, err
}
//
cryptokey, ok := sshPubKey.(ssh.CryptoPublicKey)
if !ok {
err := errors.New("cannot cast public key!")
return runtimeState, err
}
logger.Debugf(3, "adding")
runtimeState.KeymasterPublicKeys = append(runtimeState.KeymasterPublicKeys, cryptokey.CryptoPublicKey())
}
}
if strings.HasPrefix(string(runtimeState.SSHCARawFileContent[:]), "-----BEGIN RSA PRIVATE KEY-----") {
signer, err := getSignerFromPEMBytes(runtimeState.SSHCARawFileContent)
if err != nil {
logger.Printf("Cannot parse Priave Key file")
return runtimeState, err
}
runtimeState.caCertDer, err = generateCADer(&runtimeState, signer)
if err != nil {
logger.Printf("Cannot generate CA Der")
return runtimeState, err
}
// Assignmet of signer MUST be the last operation after
// all error checks
runtimeState.Signer = signer
runtimeState.signerPublicKeyToKeymasterKeys()
runtimeState.SignerIsReady <- true
} else {
if runtimeState.ClientCAPool == nil {
err := errors.New("Invalid ssh CA private key file and NO clientCA")
return runtimeState, err
}
//check that the loaded date seems like an openpgp armored file
fileAsString := string(runtimeState.SSHCARawFileContent[:])
if !strings.HasPrefix(fileAsString, "-----BEGIN PGP MESSAGE-----") {
err = errors.New("Have a client CA but the CA file does NOT look like and PGP file")
return runtimeState, err
}
}
//create the oath2 config
if runtimeState.Config.Oauth2.Enabled == true {
logger.Printf("oath2 is enabled")
runtimeState.Config.Oauth2.Config = &oauth2.Config{
ClientID: runtimeState.Config.Oauth2.ClientID,
ClientSecret: runtimeState.Config.Oauth2.ClientSecret,
Endpoint: oauth2.Endpoint{
AuthURL: runtimeState.Config.Oauth2.AuthUrl,
TokenURL: runtimeState.Config.Oauth2.TokenUrl},
RedirectURL: "https://" + runtimeState.HostIdentity + runtimeState.Config.Base.HttpAddress + redirectPath,
Scopes: strings.Split(runtimeState.Config.Oauth2.Scopes, " ")}
}
if runtimeState.Config.SymantecVIP.Enabled == true {
logger.Printf("symantec VIP is enabled")
certPem, err := exitsAndCanRead(runtimeState.Config.SymantecVIP.CertFile, "VIP certificate file")
if err != nil {
return runtimeState, err
}
keyPem, err := exitsAndCanRead(runtimeState.Config.SymantecVIP.KeyFile, "VIP key file")
if err != nil {
return runtimeState, err
}
client, err := vip.NewClient(certPem, keyPem)
if err != nil {
return runtimeState, err
}
client.VipPushMessageText = "Keymaster Push Authentication Request"
client.VipPushDisplayMessageText = "Keymaster 2FA request from:"
client.VipPushDisplayMessageProfile = u2fAppID //TODO change this for host identity
runtimeState.Config.SymantecVIP.Client = &client
}
//
if runtimeState.Config.Base.HideStandardLogin && !runtimeState.Config.Oauth2.Enabled {
err := errors.New("invalid configuration... cannot hide std login without enabling oath2")
return runtimeState, err
}
//Load extra templates
err = runtimeState.loadTemplates()
if err != nil {
return runtimeState, err
}
// ExtAuthCommand
if len(runtimeState.Config.Base.ExternalAuthCmd) > 0 {
runtimeState.passwordChecker, err = command.New(runtimeState.Config.Base.ExternalAuthCmd, nil, logger)
if err != nil {
return runtimeState, err
}
}
if len(runtimeState.Config.Ldap.LDAPTargetURLs) > 0 {
const timeoutSecs = 3
pwdCache := &runtimeState
if runtimeState.Config.Ldap.DisablePasswordCache {
pwdCache = nil
}
runtimeState.passwordChecker, err = ldap.New(
strings.Split(runtimeState.Config.Ldap.LDAPTargetURLs, ","),
[]string{runtimeState.Config.Ldap.BindPattern},
timeoutSecs, nil, pwdCache,
logger)
if err != nil {
return runtimeState, err
}
logger.Debugf(1, "passwordChecker= %+v", runtimeState.passwordChecker)
}
logger.Debugf(1, "End of config initialization: %+v", runtimeState)
// DB initialization
err = initDB(&runtimeState)
if err != nil {
return runtimeState, err
}
// and we start the cleanup
go runtimeState.performStateCleanup(secsBetweenCleanup)
return runtimeState, nil
}
func generateArmoredEncryptedCAPritaveKey(passphrase []byte, filepath string) error {
privateKey, err := rsa.GenerateKey(rand.Reader, defaultRSAKeySize)
if err != nil {
return err
}
sshPublicKey, err := ssh.NewPublicKey(&privateKey.PublicKey)
if err != nil {
return err
}
publicKeyBytes := ssh.MarshalAuthorizedKey(sshPublicKey)
err = ioutil.WriteFile(filepath+".pub", publicKeyBytes, 0644)
if err != nil {
return err
}
encryptionType := "PGP MESSAGE"
armoredBuf := new(bytes.Buffer)
armoredWriter, err := armor.Encode(armoredBuf, encryptionType, nil)
if err != nil {
return err
}
plaintextWriter, err := openpgp.SymmetricallyEncrypt(armoredWriter, passphrase, nil, nil)
if err != nil {
return err
}
privateKeyPEM := &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(privateKey)}
if err := pem.Encode(plaintextWriter, privateKeyPEM); err != nil {
return err
}
plaintextWriter.Close()
armoredWriter.Close()
//os.Remove(filepath)
return ioutil.WriteFile(filepath, armoredBuf.Bytes(), 0600)
}
func getPassphrase() ([]byte, error) {
///matching := false
for {
fmt.Printf("Please enter your passphrase:\n")
passphrase1, err := gopass.GetPasswd()
if err != nil {
return nil, err
}
fmt.Printf("Please re-enter your passphrase:\n")
passphrase2, err := gopass.GetPasswd()
if err != nil {
return nil, err
}
if bytes.Equal(passphrase1, passphrase2) {
return passphrase1, nil
}
fmt.Printf("Passphrases dont match, lets try again ")
}
}
func getUserString(reader *bufio.Reader, displayValue, defaultValue string) (string, error) {
fmt.Printf("%s[%s]:", displayValue, defaultValue)
text, err := reader.ReadString('\n')
if err != nil {
return "", err
}
if len(text) > 1 {
return text, nil
}
return defaultValue, nil
}
func generateRSAKeyAndSaveInFile(filename string, bits int) (*rsa.PrivateKey, error) {
if bits < 2048 {
bits = defaultRSAKeySize
}
privateKey, err := rsa.GenerateKey(rand.Reader, bits)
if err != nil {
return nil, err
}
file, err := os.Create(filename)
if err != nil {
return nil, err
}
defer file.Close()
privateKeyPEM := &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(privateKey)}
if err := pem.Encode(file, privateKeyPEM); err != nil {
return nil, err
}
return privateKey, nil
}
func generateCertAndWriteToFile(filename string, template, parent *x509.Certificate, pub, priv interface{}) ([]byte, error) {
derBytes, err := x509.CreateCertificate(rand.Reader, template, parent, pub, priv)
if err != nil {
logger.Printf("Failed to create certificate: %s", err)
return nil, err
}
certOut, err := os.Create(filename)
if err != nil {
logger.Printf("failed to open cert.pem for writing: %s", err)
return nil, err
}
defer certOut.Close()
pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
logger.Print("written cert.pem\n")
return derBytes, nil
}
func generateCerts(configDir string, config *baseConfig, rsaKeySize int) error {
//First generate a self signeed cert for itelf
serverKeyFilename := configDir + "/server.key"
serverKey, err := generateRSAKeyAndSaveInFile(serverKeyFilename, rsaKeySize)
if err != nil {
return err
}
// Now make the cert
notBefore := time.Now()
validFor := time.Duration(5 * 365 * 24 * time.Hour)
notAfter := notBefore.Add(validFor)
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
if err != nil {
logger.Printf("failed to generate serial number: %s", err)
return err
}
template := x509.Certificate{
SerialNumber: serialNumber,
Subject: pkix.Name{
Organization: []string{"Acme Co"},
},
NotBefore: notBefore,
NotAfter: notAfter,
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
BasicConstraintsValid: true,
}
template.DNSNames = append(template.DNSNames, "localhost")
serverCertFilename := configDir + "/server.pem"
_, err = generateCertAndWriteToFile(serverCertFilename, &template, &template, &serverKey.PublicKey, serverKey)
if err != nil {
logger.Printf("Failed to create certificate: %s", err)
return err
}
//now the admin CA
adminCAKeyFilename := configDir + "/adminCA.key"
adminCAKey, err := generateRSAKeyAndSaveInFile(adminCAKeyFilename, rsaKeySize)
if err != nil {
return err
}
//
caTemplate := template
serialNumber, err = rand.Int(rand.Reader, serialNumberLimit)
if err != nil {
logger.Printf("failed to generate serial number: %s", err)
return err
}
caTemplate.DNSNames = nil
caTemplate.SerialNumber = serialNumber
caTemplate.IsCA = true
caTemplate.KeyUsage |= x509.KeyUsageCertSign
caTemplate.ExtKeyUsage = []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth}
caTemplate.Subject = pkix.Name{Organization: []string{"Acme Co CA"}}
adminCACertFilename := configDir + "/adminCA.pem"
caDer, err := generateCertAndWriteToFile(adminCACertFilename, &caTemplate, &caTemplate, &adminCAKey.PublicKey, adminCAKey)
if err != nil {
logger.Printf("Failed to create certificate: %s", err)
return err
}
// Now the admin client
caCert, err := x509.ParseCertificate(caDer)
if err != nil {
logger.Printf("Failed to parse certificate: %s", err)
return err
}
clientKeyFilename := configDir + "/adminClient.key"
clientKey, err := generateRSAKeyAndSaveInFile(clientKeyFilename, rsaKeySize)
if err != nil {
logger.Printf("Failed to generate file for key: %s", err)
return err
}
//Fix template!
clientTemplate := template
//client.KeyUsage |= ExtKeyUsageClientAuth
clientTemplate.ExtKeyUsage = []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth}
clientCertFilename := configDir + "/adminClient.pem"
_, err = generateCertAndWriteToFile(clientCertFilename, &clientTemplate, caCert, &clientKey.PublicKey, adminCAKey)
if err != nil {
logger.Printf("Failed to create certificate: %s", err)
return err
}
config.TLSKeyFilename = serverKeyFilename
config.TLSCertFilename = serverCertFilename
config.ClientCAFilename = adminCACertFilename
return nil
}
func generateNewConfig(configFilename string) error {
reader := bufio.NewReader(os.Stdin)
const rsaKeySize = 3072
passphrase, err := getPassphrase()
if err != nil {
logger.Printf("error getting passphrase")
return err
}
return generateNewConfigInternal(reader, configFilename, rsaKeySize, passphrase)
}
// Generates a simple base config via an interview like process
func generateNewConfigInternal(reader *bufio.Reader, configFilename string, rsaKeySize int, passphrase []byte) error {
var config AppConfigFile
//Get base dir
baseDir, err := getUserString(reader, "Default base Dir", "/tmp")
if err != nil {
return err
}
baseDir = strings.Trim(baseDir, "\r\n")
//make dest tartget
configDir := filepath.Join(baseDir, "/etc/keymaster")
logger.Printf("configdir = '%s'", configDir)
err = os.MkdirAll(configDir, os.ModeDir|0755)
if err != nil {
return err
}
//fmt.Println(baseDir)
config.Base.DataDirectory, err = getUserString(reader, "Data Directory", baseDir+"/var/lib/keymaster")
if err != nil {
return err
}
err = os.MkdirAll(config.Base.DataDirectory, os.ModeDir|0755)
if err != nil {
return err
}
// TODO: Add check that directory exists.
defaultHttpAddress := ":443"
config.Base.HttpAddress, err = getUserString(reader, "HttpAddress", defaultHttpAddress)
if err != nil {
return err
}
// Todo check if valid
defaultAdminAddress := ":6920"
config.Base.AdminAddress, err = getUserString(reader, "AdminAddress", defaultAdminAddress)
if err != nil {
return err
}
config.Base.SSHCAFilename = filepath.Join(configDir, "masterKey.asc")
err = generateArmoredEncryptedCAPritaveKey(passphrase, config.Base.SSHCAFilename)
if err != nil {
return err
}
//generatecerts
err = generateCerts(configDir, &config.Base, rsaKeySize)
if err != nil {
return err
}
//make sample apache config file
// This DB has user 'username' with password 'password'
const userdbContent = `username:$2y$05$D4qQmZbWYqfgtGtez2EGdOkcNne40EdEznOqMvZegQypT8Jdz42Jy`
httpPassFilename := filepath.Join(configDir, "passfile.htpass")
err = ioutil.WriteFile(httpPassFilename, []byte(userdbContent), 0644)
if err != nil {
return err
}
config.Base.HtpasswdFilename = httpPassFilename
logger.Debugf(1, "%+v", config)
configText, err := yaml.Marshal(&config)
if err != nil {
return err
}
err = ioutil.WriteFile(configFilename, configText, 0640)
if err != nil {
return err
}
fmt.Printf("--- config dump:\n%s\n\n", string(configText))
return nil
}