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config.go
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config.go
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package keyStore
import (
"github.com/echocat/caretakerd/errors"
"github.com/echocat/caretakerd/values"
"strconv"
"strings"
)
var defaults = map[string]interface{}{
"Type": Generated,
"PemFile": values.String(""),
"Hints": values.String("algorithm:`rsa` bits:`1024`"),
"CaFile": values.String(""),
}
// # Description
//
// Defines the keyStore of caretakerd.
type Config struct {
// @default generated
//
// Defines the type of instance keyStore.
Type Type `json:"type" yaml:"type"`
// @default ""
//
// Defines the pemFile which contains the key and certificate to use.
// This have to be of type PEM and have to contain the certificate and private key.
// Currently the private key is only supported of type RSA.
//
// This property is only evaluated and required if {@ref #Type type} is set to
// {@ref .Type#FromFile fromFile}.
PemFile values.String `json:"pemFile,omitempty" yaml:"pemFile"`
// @default "algorithm:`rsa` bits:`1024`"
//
// Defines some hints for instance store in format ``[<key:`value`>...]``.
// Possible hints are:
//
// * ``algorithm``: Algorithm to use for creation of new keys. Currently only ``rsa`` is supported.
// * ``bits``: Number of bits to create a new key with.
Hints values.String `json:"hints,omitempty" yaml:"hints"`
// @default ""
//
// File where trusted certificates are stored in. This have to be in PEM format.
CaFile values.String `json:"caFile,omitempty" yaml:"caFile"`
}
// NewConfig creates a new instance of Config.
func NewConfig() Config {
result := Config{}
values.SetDefaultsTo(defaults, &result)
return result
}
// Validate do validate action on this object and return an error object if any.
func (instance Config) Validate() error {
err := instance.Type.Validate()
if err == nil {
err = instance.validateRequireStringOrNotValue(instance.PemFile, "pemFile", instance.Type.IsTakingFilename)
}
if err == nil {
err = instance.validateStringOnlyAllowedValue(instance.CaFile, "caFile", instance.Type.IsConsumingCAFile)
}
if err == nil {
algorithm := instance.GetHintsArgument("algorithm")
if len(algorithm) > 0 && strings.ToLower(algorithm) != "rsa" {
err = errors.New("Unsupported algorithm: %s", algorithm)
}
}
return err
}
func (instance Config) validateRequireStringOrNotValue(value values.String, fieldName string, isAllowedMethod func() bool) error {
if isAllowedMethod() {
if value.IsEmpty() {
return errors.New("There is no %s set for type %v.", fieldName, instance.Type)
}
} else {
if !value.IsEmpty() {
return errors.New("There is no %s allowed for type %v.", fieldName, instance.Type)
}
}
return nil
}
func (instance Config) validateStringOnlyAllowedValue(value values.String, fieldName string, isAllowedMethod func() bool) error {
if !isAllowedMethod() && !value.IsEmpty() {
return errors.New("There is no %s allowed for type %v.", fieldName, instance.Type)
}
return nil
}
// GetHintsArgument returns hints argument content for the given key.
// If there is no hint for this key and empty string is returned.
func (instance Config) GetHintsArgument(key string) string {
arguments := instance.Hints
for arguments != "" {
i := 0
for i < len(arguments) && arguments[i] == ' ' {
i++
}
arguments = arguments[i:]
if arguments == "" {
break
}
i = 0
for i < len(arguments) && arguments[i] > ' ' && arguments[i] != ':' && arguments[i] != '`' && arguments[i] != 0x7f {
i++
}
if i == 0 || i+1 >= len(arguments) || arguments[i] != ':' || arguments[i+1] != '`' {
break
}
name := string(arguments[:i])
arguments = arguments[i+1:]
i = 1
for i < len(arguments) && arguments[i] != '`' {
if arguments[i] == '\\' {
i++
}
i++
}
if i >= len(arguments) {
break
}
qvalue := string(arguments[:i+1])
arguments = arguments[i+1:]
if key == name {
value, err := strconv.Unquote(qvalue)
if err != nil {
break
}
return value
}
}
return ""
}