certificates/authority/provisioner/sign_options.go

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package provisioner
import (
"crypto/x509"
"github.com/pkg/errors"
"github.com/smallstep/cli/crypto/x509util"
)
// SignOption is the interface used to collect all extra options used in the
// Sign method.
type SignOption interface{}
// CertificateValidator is the interface used to validate a X.509 certificate.
type CertificateValidator interface {
SignOption
Valid(crt *x509.Certificate) error
}
// CertificateRequestValidator is the interface used to validate a X.509
// certificate request.
type CertificateRequestValidator interface {
SignOption
Valid(req *x509.CertificateRequest)
}
// ProfileWithOption is the interface used to add custom options to the profile
// constructor. The options are used to modify the final certificate.
type ProfileWithOption interface {
SignOption
Option() x509util.WithOption
}
// emailOnlyIdentity is a CertificateRequestValidator that checks that the only
// SAN provided is the given email address.
type emailOnlyIdentity string
func (e emailOnlyIdentity) Valid(req *x509.CertificateRequest) error {
switch {
case len(req.DNSNames) > 0:
return errors.New("certificate request cannot contain DNS names")
case len(req.IPAddresses) > 0:
return errors.New("certificate request cannot contain IP addresses")
case len(req.URIs) > 0:
return errors.New("certificate request cannot contain URIs")
case len(req.EmailAddresses) == 0:
return errors.New("certificate request does not contain any email address")
case len(req.EmailAddresses) > 1:
return errors.New("certificate request does not contain too many email addresses")
case req.EmailAddresses[0] != string(e):
return errors.New("certificate request does not contain the valid email address")
default:
return nil
}
}