ASP.NET Core encryption and SQL Server - sql-server

Question

I am creating a default user for my system. However I am creating through SQL Server database.
I use ASP.NET Core and Entity Framework to handle logins, by default Entity Framework creates a table called AspNetUsers; this table has a column called PasswordHash, I believe the encryption used is of the Hash type.
I am entering the password on this user by the database as follows:
DECLARE #HashThis nvarchar(4000);
SET #HashThis = CONVERT(nvarchar(4000),'Administrador');
SELECT HASHBYTES('SHA1', #HashThis)
UPDATE AspNetUsers
SET PasswordHash = HASHBYTES('SHA1', #HashThis),
SecurityStamp = '0b12450e-016d-4cd6-af7b-fa6d2198586f',
ConcurrencyStamp = 'a63a5236-4020-4f69-93b1-9f077ba014cd',
UserName = 'administrador#administrador.com.br'
But the password column is getting strange characters in Japanese, it follows the image:
The biggest issue and when I log in ASP.NET Core, only the password invalidates.
How can I do to bypass this?
Observation: when I create the user through ASP.NET Core, it works normally.

Answer 1

Here is one example how you can seed you user:
In you SecurityDbContext you can create following methods (I added SeedRoles in case you need them):
public static async Task Seed(IServiceProvider serviceProvider)
{
await SeedRoles(serviceProvider);
await SeedUsers(serviceProvider);
}
Seed Roles:
public static async Task SeedRoles(IServiceProvider serviceProvider)
{
RoleManager<ApplicationRole> roleManager = serviceProvider.GetRequiredService<RoleManager<ApplicationRole>>();
string[] roles = ...;
foreach(var role in roles)
{
ApplicationRole appRole = await roleManager.FindByNameAsync(role);
if (appRole == null)
{
await roleManager.CreateAsync(new ApplicationRole(role));
}
}
}
Seed User:
public static async Task SeedUser(IServiceProvider serviceProvider, UserManager<ApplicationUser> userManager, string email, string password, string roleName = "")
{
string userName = roleName;
ApplicationUser user = await userManager.FindByNameAsync(userName);
if (user == null)
{
// Create user account if it doesn't exist
user = new ApplicationUser
{
UserName = userName,
Email = email
};
IdentityResult result = await userManager.CreateAsync(user, password);
// Assign role to the user
if (result.Succeeded)
{
user = await userManager.FindByNameAsync(userName);
}
}
if (user != null && roleName.Length > 0)
{
await userManager.AddToRoleAsync(user, roleName);
}
}
From SeedUsers method, just call SeedUser as many times as you need.
And then just simply call Seed method from Startup.cs Configure method:
SecurityDbContextSeed.Seed(app.ApplicationServices).Wait();