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package acme
import (
"crypto"
"encoding/base64"
"encoding/json"
"time"
"go.step.sm/crypto/jose"
"github.com/smallstep/certificates/authority/policy"
)
// Account is a subset of the internal account type containing only those
// attributes required for responses in the ACME protocol.
type Account struct {
ID string `json:"-"`
Key *jose.JSONWebKey `json:"-"`
Contact []string `json:"contact,omitempty"`
Status Status `json:"status"`
OrdersURL string `json:"orders"`
ExternalAccountBinding interface{} `json:"externalAccountBinding,omitempty"`
LocationPrefix string `json:"-"`
ProvisionerID string `json:"-"`
ProvisionerName string `json:"-"`
}
// GetLocation returns the URL location of the given account.
func (a *Account) GetLocation() string {
if a.LocationPrefix == "" {
return ""
}
return a.LocationPrefix + a.ID
}
// ToLog enables response logging.
func (a *Account) ToLog() (interface{}, error) {
b, err := json.Marshal(a)
if err != nil {
return nil, WrapErrorISE(err, "error marshaling account for logging")
}
return string(b), nil
}
// IsValid returns true if the Account is valid.
func (a *Account) IsValid() bool {
return a.Status == StatusValid
}
// KeyToID converts a JWK to a thumbprint.
func KeyToID(jwk *jose.JSONWebKey) (string, error) {
kid, err := jwk.Thumbprint(crypto.SHA256)
if err != nil {
return "", WrapErrorISE(err, "error generating jwk thumbprint")
}
return base64.RawURLEncoding.EncodeToString(kid), nil
}
// PolicyNames contains ACME account level policy names
type PolicyNames struct {
DNSNames []string `json:"dns"`
IPRanges []string `json:"ips"`
}
// X509Policy contains ACME account level X.509 policy
type X509Policy struct {
Allowed PolicyNames `json:"allow"`
Denied PolicyNames `json:"deny"`
AllowWildcardNames bool `json:"allowWildcardNames"`
}
// Policy is an ACME Account level policy
type Policy struct {
X509 X509Policy `json:"x509"`
}
func (p *Policy) GetAllowedNameOptions() *policy.X509NameOptions {
if p == nil {
return nil
}
return &policy.X509NameOptions{
DNSDomains: p.X509.Allowed.DNSNames,
IPRanges: p.X509.Allowed.IPRanges,
}
}
func (p *Policy) GetDeniedNameOptions() *policy.X509NameOptions {
if p == nil {
return nil
}
return &policy.X509NameOptions{
DNSDomains: p.X509.Denied.DNSNames,
IPRanges: p.X509.Denied.IPRanges,
}
}
// AreWildcardNamesAllowed returns if wildcard names
// like *.example.com are allowed to be signed.
// Defaults to false.
func (p *Policy) AreWildcardNamesAllowed() bool {
if p == nil {
return false
}
return p.X509.AllowWildcardNames
}
// ExternalAccountKey is an ACME External Account Binding key.
type ExternalAccountKey struct {
ID string `json:"id"`
ProvisionerID string `json:"provisionerID"`
Reference string `json:"reference"`
AccountID string `json:"-"`
HmacKey []byte `json:"-"`
CreatedAt time.Time `json:"createdAt"`
BoundAt time.Time `json:"boundAt,omitempty"`
Policy *Policy `json:"policy,omitempty"`
}
// AlreadyBound returns whether this EAK is already bound to
// an ACME Account or not.
func (eak *ExternalAccountKey) AlreadyBound() bool {
return !eak.BoundAt.IsZero()
}
// BindTo binds the EAK to an Account.
// It returns an error if it's already bound.
func (eak *ExternalAccountKey) BindTo(account *Account) error {
if eak.AlreadyBound() {
return NewError(ErrorUnauthorizedType, "external account binding key with id '%s' was already bound to account '%s' on %s", eak.ID, eak.AccountID, eak.BoundAt)
}
eak.AccountID = account.ID
eak.BoundAt = time.Now()
eak.HmacKey = []byte{} // clearing the key bytes; can only be used once
return nil
}
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