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/*
*
* gocommon - Go library to interact with the JoyentCloud
*
*
* Copyright (c) 2016 Joyent Inc.
*
* Written by Daniele Stroppa <daniele.stroppa@joyent.com>
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package jpc
import (
"fmt"
"io/ioutil"
"os"
"reflect"
"runtime"
"github.com/joyent/gosign/auth"
)
const (
// Environment variables
TritonAccount = "TRITON_ACCOUNT"
TritonKeyId = "TRITON_KEY_ID"
TritonUrl = "TRITON_URL"
SdcAccount = "SDC_ACCOUNT"
SdcKeyId = "SDC_KEY_ID"
SdcUrl = "SDC_URL"
MantaUser = "MANTA_USER"
MantaKeyId = "MANTA_KEY_ID"
MantaUrl = "MANTA_URL"
)
var Locations = map[string]string{
"us-east-1": "America/New_York",
"us-west-1": "America/Los_Angeles",
"us-sw-1": "America/Los_Angeles",
"eu-ams-1": "Europe/Amsterdam",
}
// getConfig returns the value of the first available environment
// variable, among the given ones.
func getConfig(envVars ...string) (value string) {
value = ""
for _, v := range envVars {
value = os.Getenv(v)
if value != "" {
break
}
}
return
}
// getUserHome returns the value of HOME environment
// variable for the user environment.
func getUserHome() string {
if runtime.GOOS == "windows" {
return os.Getenv("APPDATA")
} else {
return os.Getenv("HOME")
}
}
// credentialsFromEnv creates and initializes the credentials from the
// environment variables.
func credentialsFromEnv(key string) (*auth.Credentials, error) {
var keyName string
if key == "" {
keyName = getUserHome() + "/.ssh/id_rsa"
} else {
keyName = key
}
privateKey, err := ioutil.ReadFile(keyName)
if err != nil {
return nil, err
}
authentication, err := auth.NewAuth(getConfig(TritonAccount, SdcAccount, MantaUser), string(privateKey), "rsa-sha256")
if err != nil {
return nil, err
}
return &auth.Credentials{
UserAuthentication: authentication,
SdcKeyId: getConfig(TritonKeyId, SdcKeyId),
SdcEndpoint: auth.Endpoint{URL: getConfig(TritonUrl, SdcUrl)},
MantaKeyId: getConfig(MantaKeyId),
MantaEndpoint: auth.Endpoint{URL: getConfig(MantaUrl)},
}, nil
}
// CompleteCredentialsFromEnv gets and verifies all the required
// authentication parameters have values in the environment.
func CompleteCredentialsFromEnv(keyName string) (cred *auth.Credentials, err error) {
cred, err = credentialsFromEnv(keyName)
if err != nil {
return nil, err
}
v := reflect.ValueOf(cred).Elem()
t := v.Type()
for i := 0; i < v.NumField(); i++ {
f := v.Field(i)
if f.String() == "" {
return nil, fmt.Errorf("Required environment variable not set for credentials attribute: %s", t.Field(i).Name)
}
}
return cred, nil
}
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