x509

Documentation

Overview

Package x509 provides a request authenticator that validates and extracts user information from client certificates

Index

• Variables
• func DefaultVerifyOptions() x509.VerifyOptions
• type Authenticator
  • func New(opts x509.VerifyOptions, user UserConversion) *Authenticator
  • func (a *Authenticator) AuthenticateRequest(req *http.Request) (user.Info, bool, error)
• type UserConversion
• type UserConversionFunc
  • func (f UserConversionFunc) User(chain []*x509.Certificate) (user.Info, bool, error)

Variables

var CommonNameUserConversion = UserConversionFunc(func(chain []*x509.Certificate) (user.Info, bool, error) {
	if len(chain[0].Subject.CommonName) == 0 {
		return nil, false, nil
	}
	return &user.DefaultInfo{Name: chain[0].Subject.CommonName}, true, nil
})

CommonNameUserConversion builds user info from a certificate chain using the subject's CommonName

var DNSNameUserConversion = UserConversionFunc(func(chain []*x509.Certificate) (user.Info, bool, error) {
	if len(chain[0].DNSNames) == 0 {
		return nil, false, nil
	}
	return &user.DefaultInfo{Name: chain[0].DNSNames[0]}, true, nil
})

DNSNameUserConversion builds user info from a certificate chain using the first DNSName on the certificate

var EmailAddressUserConversion = UserConversionFunc(func(chain []*x509.Certificate) (user.Info, bool, error) {
	var emailAddressOID asn1.ObjectIdentifier = []int{1, 2, 840, 113549, 1, 9, 1}
	if len(chain[0].EmailAddresses) == 0 {
		for _, name := range chain[0].Subject.Names {
			if name.Type.Equal(emailAddressOID) {
				return &user.DefaultInfo{Name: name.Value.(string)}, true, nil
			}
		}
		return nil, false, nil
	}
	return &user.DefaultInfo{Name: chain[0].EmailAddresses[0]}, true, nil
})

EmailAddressUserConversion builds user info from a certificate chain using the first EmailAddress on the certificate

Functions

func DefaultVerifyOptions

func DefaultVerifyOptions() x509.VerifyOptions

DefaultVerifyOptions returns VerifyOptions that use the system root certificates, current time, and requires certificates to be valid for client auth (x509.ExtKeyUsageClientAuth)

Types

type Authenticator

type Authenticator struct {
	// contains filtered or unexported fields
}

Authenticator implements request.Authenticator by extracting user info from verified client certificates

func New

func New(opts x509.VerifyOptions, user UserConversion) *Authenticator

New returns a request.Authenticator that verifies client certificates using the provided VerifyOptions, and converts valid certificate chains into user.Info using the provided UserConversion

func (*Authenticator) AuthenticateRequest

func (a *Authenticator) AuthenticateRequest(req *http.Request) (user.Info, bool, error)

AuthenticateRequest authenticates the request using presented client certificates

type UserConversion

type UserConversion interface {
	User(chain []*x509.Certificate) (user.Info, bool, error)
}

UserConversion defines an interface for extracting user info from a client certificate chain

type UserConversionFunc

type UserConversionFunc func(chain []*x509.Certificate) (user.Info, bool, error)

UserConversionFunc is a function that implements the UserConversion interface.

func (UserConversionFunc) User

func (f UserConversionFunc) User(chain []*x509.Certificate) (user.Info, bool, error)

User implements x509.UserConversion