// Generate JWT [JSON Web Token]
public static string GetToken(UserView user)
{
var config = BaseHelpers.GetService <IConfiguration>();
// get the secret string
var secret = GetSecretKey();
// hashing the secret string
var creds = new SigningCredentials(secret, SecurityAlgorithms.HmacSha256);
// get the token Lifetime in hours
int hours = config.GetValue <int>("JWT:Lifetime");
// get all user properties excluding any [Type = Collection]
// then return new Collection<Claims> [ holding KeyValue pair of each User Property ]
var claims = user.GetProperties()
.Where(property => !property.PropertyType.FullName.Contains("Collections"))
.Select(property => new Claim(property.Name, (property.GetValue(user) != null) ? property.GetValue(user).ToString() : ""));
// Create Token with Token Options
var token = new JwtSecurityToken(
issuer: config.GetValue <string>("JWT:Issuer"),
audience: config.GetValue <string>("JWT:Audience"),
claims: claims,
expires: DateTime.UtcNow.AddHours(hours),
signingCredentials: creds);
// finally return the Token String
return(new JwtSecurityTokenHandler().WriteToken(token));
}
// A Function to return new TokenValidationParameters object
public static TokenValidationParameters GetTokenValidationOptions(bool validateLifetime)
{
var config = BaseHelpers.GetService <IConfiguration>();
return(new TokenValidationParameters
{
ValidateLifetime = validateLifetime,
ValidateIssuer = true,
ValidateAudience = true,
ValidateIssuerSigningKey = true,
ValidIssuer = config.GetValue <string>("JWT:Issuer"),
ValidAudience = config.GetValue <string>("JWT:Audience"),
IssuerSigningKey = GetSecretKey()
});
}
// get SecretKey from appsettings.json file
public static SymmetricSecurityKey GetSecretKey()
{
string secret = BaseHelpers.GetService <IConfiguration>().GetValue <string>("SecretKey"); // "appsettings.json".GetJsonValue<AppSettings>("SecretKey");
return(new SymmetricSecurityKey(Encoding.UTF8.GetBytes(secret)));
}
