/// <summary>
/// 获取基于JWT的Token
/// </summary>
/// <param name="username"></param>
/// <returns></returns>
public static dynamic BuildJwtToken(Claim[] claims, PermissionRequirement permissionRequirement)
{
var now = DateTime.UtcNow;
var jwt = new JwtSecurityToken(
issuer: permissionRequirement.Issuer,
audience: permissionRequirement.Audience,
claims: claims,
notBefore: now,
expires: now.Add(permissionRequirement.Expiration),
signingCredentials: permissionRequirement.SigningCredentials
);
var encodedJwt = new JwtSecurityTokenHandler().WriteToken(jwt);
var response = new
{
Status = true,
access_token = encodedJwt,
expires_in = permissionRequirement.Expiration.TotalMilliseconds,
token_type = "Bearer"
};
return(response);
}
/// <summary>
///
/// </summary>
/// <param name="services"></param>
void AddAuth(IServiceCollection services)
{
//读取配置文件
var audienceConfig = Configuration.GetSection("Audience");
var symmetricKeyAsBase64 = audienceConfig["Secret"];
var keyByteArray = Encoding.ASCII.GetBytes(symmetricKeyAsBase64);
var signingKey = new SymmetricSecurityKey(keyByteArray);
var tokenValidationParameters = new TokenValidationParameters
{
ValidateIssuerSigningKey = true,
IssuerSigningKey = signingKey,
ValidateIssuer = true,
ValidIssuer = audienceConfig["Issuer"],
ValidateAudience = true,
ValidAudience = audienceConfig["Audience"],
ValidateLifetime = true,
ClockSkew = TimeSpan.Zero,
RequireExpirationTime = true,
};
var signingCredentials = new SigningCredentials(signingKey, SecurityAlgorithms.HmacSha256);
//这个集合模拟用户权限表,可从数据库中查询出来
var permission = new List <Permission> {
new Permission {
Url = "/adminapi", Name = "admin"
},
new Permission {
Url = "/systemapi", Name = "system"
}
};
//如果第三个参数，是ClaimTypes.Role，上面集合的每个元素的Name为角色名称，如果ClaimTypes.Name，即上面集合的每个元素的Name为用户名
var permissionRequirement = new PermissionRequirement(
"/api/denied", permission,
ClaimTypes.Role,
audienceConfig["Issuer"],
audienceConfig["Audience"],
signingCredentials,
expiration: TimeSpan.FromSeconds(1000000)//设置Token过期时间
);
services.AddAuthorization(options =>
{
options.AddPolicy("Permission", policy => policy.AddRequirements(permissionRequirement));
}).
AddAuthentication(options =>
{
options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(JwtBearerDefaults.AuthenticationScheme, o =>
{
//不使用https
o.RequireHttpsMetadata = false;
o.TokenValidationParameters = tokenValidationParameters;
o.Events = new JwtBearerEvents
{
OnTokenValidated = context =>
{
if (context.Request.Path.Value.ToString() == "/api/logout")
{
var token = ((context as TokenValidatedContext).SecurityToken as JwtSecurityToken).RawData;
}
return(Task.CompletedTask);
}
};
});
//注入授权Handler
services.AddSingleton <IAuthorizationHandler, PermissionHandler>();
services.AddSingleton(permissionRequirement);
}