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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package auth
import (
"context"
"fmt"
"strings"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
"github.com/go-webauthn/webauthn/webauthn"
)
// ErrWebAuthnCredentialNotExist represents a "ErrWebAuthnCRedentialNotExist" kind of error.
type ErrWebAuthnCredentialNotExist struct {
ID int64
CredentialID []byte
}
func (err ErrWebAuthnCredentialNotExist) Error() string {
if len(err.CredentialID) == 0 {
return fmt.Sprintf("WebAuthn credential does not exist [id: %d]", err.ID)
}
return fmt.Sprintf("WebAuthn credential does not exist [credential_id: %x]", err.CredentialID)
}
// Unwrap unwraps this as a ErrNotExist err
func (err ErrWebAuthnCredentialNotExist) Unwrap() error {
return util.ErrNotExist
}
// IsErrWebAuthnCredentialNotExist checks if an error is a ErrWebAuthnCredentialNotExist.
func IsErrWebAuthnCredentialNotExist(err error) bool {
_, ok := err.(ErrWebAuthnCredentialNotExist)
return ok
}
// WebAuthnCredential represents the WebAuthn credential data for a public-key
// credential conformant to WebAuthn Level 3
type WebAuthnCredential struct {
ID int64 `xorm:"pk autoincr"`
Name string
LowerName string `xorm:"unique(s)"`
UserID int64 `xorm:"INDEX unique(s)"`
CredentialID []byte `xorm:"INDEX VARBINARY(1024)"`
PublicKey []byte
AttestationType string
AAGUID []byte
SignCount uint32 `xorm:"BIGINT"`
CloneWarning bool
BackupEligible bool `XORM:"NOT NULL DEFAULT false"`
BackupState bool `XORM:"NOT NULL DEFAULT false"`
// If legacy is set to true, backup_eligible and backup_state isn't set.
Legacy bool `XORM:"NOT NULL DEFAULT true"`
CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
}
func init() {
db.RegisterModel(new(WebAuthnCredential))
}
// TableName returns a better table name for WebAuthnCredential
func (cred WebAuthnCredential) TableName() string {
return "webauthn_credential"
}
// UpdateSignCount will update the database value of SignCount
func (cred *WebAuthnCredential) UpdateSignCount(ctx context.Context) error {
_, err := db.GetEngine(ctx).ID(cred.ID).Cols("sign_count").Update(cred)
return err
}
// UpdateFromLegacy update the values that aren't present on legacy credentials.
func (cred *WebAuthnCredential) UpdateFromLegacy(ctx context.Context) error {
_, err := db.GetEngine(ctx).ID(cred.ID).Cols("legacy", "backup_eligible", "backup_state").Update(cred)
return err
}
// BeforeInsert will be invoked by XORM before updating a record
func (cred *WebAuthnCredential) BeforeInsert() {
cred.LowerName = strings.ToLower(cred.Name)
}
// BeforeUpdate will be invoked by XORM before updating a record
func (cred *WebAuthnCredential) BeforeUpdate() {
cred.LowerName = strings.ToLower(cred.Name)
}
// AfterLoad is invoked from XORM after setting the values of all fields of this object.
func (cred *WebAuthnCredential) AfterLoad() {
cred.LowerName = strings.ToLower(cred.Name)
}
// WebAuthnCredentialList is a list of *WebAuthnCredential
type WebAuthnCredentialList []*WebAuthnCredential
// ToCredentials will convert all WebAuthnCredentials to webauthn.Credentials
func (list WebAuthnCredentialList) ToCredentials() []webauthn.Credential {
creds := make([]webauthn.Credential, 0, len(list))
for _, cred := range list {
creds = append(creds, webauthn.Credential{
ID: cred.CredentialID,
PublicKey: cred.PublicKey,
AttestationType: cred.AttestationType,
Flags: webauthn.CredentialFlags{
BackupEligible: cred.BackupEligible,
BackupState: cred.BackupState,
},
Authenticator: webauthn.Authenticator{
AAGUID: cred.AAGUID,
SignCount: cred.SignCount,
CloneWarning: cred.CloneWarning,
},
})
}
return creds
}
// GetWebAuthnCredentialsByUID returns all WebAuthn credentials of the given user
func GetWebAuthnCredentialsByUID(ctx context.Context, uid int64) (WebAuthnCredentialList, error) {
creds := make(WebAuthnCredentialList, 0)
return creds, db.GetEngine(ctx).Where("user_id = ?", uid).Find(&creds)
}
// ExistsWebAuthnCredentialsForUID returns if the given user has credentials
func ExistsWebAuthnCredentialsForUID(ctx context.Context, uid int64) (bool, error) {
return db.GetEngine(ctx).Where("user_id = ?", uid).Exist(&WebAuthnCredential{})
}
// GetWebAuthnCredentialByName returns WebAuthn credential by id
func GetWebAuthnCredentialByName(ctx context.Context, uid int64, name string) (*WebAuthnCredential, error) {
cred := new(WebAuthnCredential)
if found, err := db.GetEngine(ctx).Where("user_id = ? AND lower_name = ?", uid, strings.ToLower(name)).Get(cred); err != nil {
return nil, err
} else if !found {
return nil, ErrWebAuthnCredentialNotExist{}
}
return cred, nil
}
// GetWebAuthnCredentialByID returns WebAuthn credential by id
func GetWebAuthnCredentialByID(ctx context.Context, id int64) (*WebAuthnCredential, error) {
cred := new(WebAuthnCredential)
if found, err := db.GetEngine(ctx).ID(id).Get(cred); err != nil {
return nil, err
} else if !found {
return nil, ErrWebAuthnCredentialNotExist{ID: id}
}
return cred, nil
}
// HasWebAuthnRegistrationsByUID returns whether a given user has WebAuthn registrations
func HasWebAuthnRegistrationsByUID(ctx context.Context, uid int64) (bool, error) {
return db.GetEngine(ctx).Where("user_id = ?", uid).Exist(&WebAuthnCredential{})
}
// GetWebAuthnCredentialByCredID returns WebAuthn credential by credential ID
func GetWebAuthnCredentialByCredID(ctx context.Context, userID int64, credID []byte) (*WebAuthnCredential, error) {
cred := new(WebAuthnCredential)
if found, err := db.GetEngine(ctx).Where("user_id = ? AND credential_id = ?", userID, credID).Get(cred); err != nil {
return nil, err
} else if !found {
return nil, ErrWebAuthnCredentialNotExist{CredentialID: credID}
}
return cred, nil
}
// CreateCredential will create a new WebAuthnCredential from the given Credential
func CreateCredential(ctx context.Context, userID int64, name string, cred *webauthn.Credential) (*WebAuthnCredential, error) {
c := &WebAuthnCredential{
UserID: userID,
Name: name,
CredentialID: cred.ID,
PublicKey: cred.PublicKey,
AttestationType: cred.AttestationType,
AAGUID: cred.Authenticator.AAGUID,
SignCount: cred.Authenticator.SignCount,
CloneWarning: false,
BackupEligible: cred.Flags.BackupEligible,
BackupState: cred.Flags.BackupState,
Legacy: false,
}
if err := db.Insert(ctx, c); err != nil {
return nil, err
}
return c, nil
}
// DeleteCredential will delete WebAuthnCredential
func DeleteCredential(ctx context.Context, id, userID int64) (bool, error) {
had, err := db.GetEngine(ctx).ID(id).Where("user_id = ?", userID).Delete(&WebAuthnCredential{})
return had > 0, err
}
// WebAuthnCredentials implementns the webauthn.User interface
func WebAuthnCredentials(ctx context.Context, userID int64) ([]webauthn.Credential, error) {
dbCreds, err := GetWebAuthnCredentialsByUID(ctx, userID)
if err != nil {
return nil, err
}
return dbCreds.ToCredentials(), nil
}
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