dex/user/email_verification.go
Joe Bowers 85113748a8 server: unify password reset and email verification code and behavior
This patch proposes behavioral changes. In particular, referring
systems will need to provide client ids under all circumstances.
2015-10-16 14:47:58 -07:00

94 lines
3.1 KiB
Go

package user
import (
"fmt"
"net/url"
"time"
"github.com/jonboulle/clockwork"
"github.com/coreos/go-oidc/jose"
"github.com/coreos/go-oidc/key"
"github.com/coreos/go-oidc/oidc"
)
var (
clock = clockwork.NewRealClock()
)
// NewEmailVerification creates an object which can be sent to a user in serialized form to verify that they control an email address.
// The clientID is the ID of the registering user. The callback is where a user should land after verifying their email.
func NewEmailVerification(user User, clientID string, issuer url.URL, callback url.URL, expires time.Duration) EmailVerification {
claims := oidc.NewClaims(issuer.String(), user.ID, clientID, clock.Now(), clock.Now().Add(expires))
claims.Add(ClaimEmailVerificationCallback, callback.String())
claims.Add(ClaimEmailVerificationEmail, user.Email)
return EmailVerification{claims}
}
type EmailVerification struct {
Claims jose.Claims
}
// Assumes that parseAndVerifyTokenClaims has already been called on claims
func verifyEmailVerificationClaims(claims jose.Claims) (EmailVerification, error) {
email, ok, err := claims.StringClaim(ClaimEmailVerificationEmail)
if err != nil {
return EmailVerification{}, err
}
if !ok || email == "" {
return EmailVerification{}, fmt.Errorf("no %q claim", ClaimEmailVerificationEmail)
}
cb, ok, err := claims.StringClaim(ClaimEmailVerificationCallback)
if err != nil {
return EmailVerification{}, err
}
if !ok || cb == "" {
return EmailVerification{}, fmt.Errorf("no %q claim", ClaimEmailVerificationCallback)
}
if _, err := url.Parse(cb); err != nil {
return EmailVerification{}, fmt.Errorf("callback URL not parseable: %v", cb)
}
return EmailVerification{claims}, nil
}
// ParseAndVerifyEmailVerificationToken parses a string into a an EmailVerification, verifies the signature, and ensures that required claims are present.
// In addition to the usual claims required by the OIDC spec, "aud" and "sub" must be present as well as ClaimEmailVerificationCallback and ClaimEmailVerificationEmail.
func ParseAndVerifyEmailVerificationToken(token string, issuer url.URL, keys []key.PublicKey) (EmailVerification, error) {
tokenClaims, err := parseAndVerifyTokenClaims(token, issuer, keys)
if err != nil {
return EmailVerification{}, err
}
return verifyEmailVerificationClaims(tokenClaims.Claims)
}
func (e EmailVerification) UserID() string {
uid, ok, err := e.Claims.StringClaim("sub")
if !ok || err != nil {
panic("EmailVerification: no sub claim. This should be impossible.")
}
return uid
}
func (e EmailVerification) Email() string {
email, ok, err := e.Claims.StringClaim(ClaimEmailVerificationEmail)
if !ok || err != nil {
panic("EmailVerification: no email claim. This should be impossible.")
}
return email
}
func (e EmailVerification) Callback() *url.URL {
cb, ok, err := e.Claims.StringClaim(ClaimEmailVerificationCallback)
if !ok || err != nil {
panic("EmailVerification: no callback claim. This should be impossible.")
}
cbURL, err := url.Parse(cb)
if err != nil {
panic("EmailVerificaiton: can't parse callback. This should be impossible.")
}
return cbURL
}