如何撤销/取消/取消旧电子邮件确认令牌(身份)

时间:2017-05-29 13:12:27

标签: asp.net asp.net-mvc asp.net-core asp.net-identity asp.net-identity-2

我允许新创建的用户知道他们的密码并且尚未确认更改他们的注册电子邮件(只要它没有在我的数据库中注册)

问题是,如果他们更改了电子邮件,我会生成新的电子邮件确认令牌,但旧令牌仍然可以验证它们(我在注册时发出的那个),这几乎可能意味着人们可以使用他们的注册邮件首先,将其更改为他们无法访问的其他邮件,并从旧邮件中进行验证,这对我来说是一个很大的安全漏洞

有没有办法删除/撤销旧令牌? (从技术上讲,我可以创建一个新用户并删除旧用户,旧令牌不会对新用户起作用,但我认为应该有更好的解决方案)

1 个答案:

答案 0 :(得分:4)

我将以下属性添加到ApplicationUser

public class ApplicationUser : IdentityUser {
    public string EmailConfirmationToken { get; set; }
    public string ResetPasswordToken { get; set; }
}

这样可以确认在确认电子邮件令牌时要验证的确认令牌。

然后我将以下内容添加到我的ApplicationUserManager UserManager<ApplicationUser>派生类中。

public override async System.Threading.Tasks.Task<string> GenerateEmailConfirmationTokenAsync(string userId) {
    /* NOTE:
     * The default UserTokenProvider generates tokens based on the users's SecurityStamp, so until that changes
     * (like when the user's password changes), the tokens will always be the same, and remain valid. 
     * So if you want to simply invalidate old tokens, just call manager.UpdateSecurityStampAsync().
     */
    //await base.UpdateSecurityStampAsync(userId);

    var token = await base.GenerateEmailConfirmationTokenAsync(userId);
    if (!string.IsNullOrEmpty(token)) {
        var user = await FindByIdAsync(userId);
        user.EmailConfirmationToken = token;
        user.EmailConfirmed = false;
        await UpdateAsync(user);
    }
    return token;
}

public override async System.Threading.Tasks.Task<string> GeneratePasswordResetTokenAsync(string userId) {
    var token = await base.GeneratePasswordResetTokenAsync(userId);
    if (!string.IsNullOrEmpty(token)) {
        var x = await FindByIdAsync(userId);
        x.ResetPasswordToken = token;
        await UpdateAsync(x);
    }
    return token;
}

public override async System.Threading.Tasks.Task<IdentityResult> ConfirmEmailAsync(string userId, string token) {
    var result = await base.ConfirmEmailAsync(userId, token);
    if (result.Succeeded) {
        var x = await FindByIdAsync(userId);
        x.EmailConfirmationToken = null;
        await UpdateAsync(x);
    }
    return result;
}

public override async System.Threading.Tasks.Task<IdentityResult> ResetPasswordAsync(string userId, string token, string newPassword) {
    var result = await base.ResetPasswordAsync(userId, token, newPassword);
    if (result.Succeeded) {
        var x = await FindByIdAsync(userId);
        x.ResetPasswordToken = null;
        await UpdateAsync(x);
    }
    return result;
}

添加了以下扩展程序,以便能够根据用户存储的令牌找到用户。

public static class ApplicationUserManagerExtension {
    public static Task<string> FindIdByEmailConfirmationTokenAsync(this UserManager<ApplicationUser> manager, string confirmationToken) {
        string result = null;

        ApplicationUser user = manager.Users.SingleOrDefault(u => u.EmailConfirmationToken != null && u.EmailConfirmationToken == confirmationToken);

        if (user != null) {
            result = user.Id;
        }

        return Task.FromResult(result);
    }

    public static Task<string> FindIdByResetPasswordTokenAsync(this UserManager<ApplicationUser> manager, string token) {
        string result = null;

        ApplicationUser user = manager.Users.SingleOrDefault(u => u.ResetPasswordToken != null && u.ResetPasswordToken == token);

        if (user != null) {
            result = user.Id;
        }

        return Task.FromResult(result);
    }
}