c# - dnx451 RC1 InMemorySymmetricSecurityKey 发生了什么？

Question

我一直在尝试使用简单的 key 创建和签署 JwtSecurityToken。经过大量研究，我发现的所有示例似乎都使用了 InMemorySymmetricSecurityKey类，但不幸的是，该类似乎不存在于最新版本的 System.IdentityModel 库中。

这些是我正在使用的依赖项:

"System.IdentityModel.Tokens": "5.0.0-rc1-211161024",
"System.IdentityModel.Tokens.Jwt": "5.0.0-rc1-211161024"

我还尝试使用它的基类 SymmetricSecurityKey但是在尝试创建 token 时出现以下异常:

"Value cannot be null.\r\nParameter name: IDX10000: The parameter 'signatureProvider' cannot be a 'null' or an empty object."

这是抛出异常的代码:

public static string CreateTokenHMAC()
{
    HMACSHA256 hmac = new HMACSHA256(Convert.FromBase64String("test"));

    var key = new SymmetricSecurityKey(hmac.Key);

    var signingCredentials = new SigningCredentials(key, SecurityAlgorithms.HmacSha256Signature);

    JwtSecurityToken token = _tokenHandler.CreateJwtSecurityToken(new SecurityTokenDescriptor()
    {
        Audience = AUDIENCE,
        Issuer = ISSUER,
        Expires = DateTime.UtcNow.AddHours(6),
        NotBefore = DateTime.Now,
        Claims = new List<Claim>()
        {
            new Claim(ClaimTypes.Email, "johndoe@example.com")
        },
        SigningCredentials = signingCredentials
    });

    return _tokenHandler.WriteToken(token);
}

这是我第一次使用 JwtSecurityToken，所以我猜我可能在某处遗漏了一个步骤

Answer 1

我无法使用已接受答案中提供的 RsaSecurityKey 示例让它工作，但这确实对我有用(使用 System.IdentityModel.Tokens.Jwt v5.1.3)。

var signingKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes("test"));
var signingCredentials = new SigningCredentials(signingKey, SecurityAlgorithms.HmacSha256);

var securityTokenDescriptor = new SecurityTokenDescriptor()
{
    Subject = new ClaimsIdentity(new List<Claim>()
    {
        new Claim(ClaimTypes.NameIdentifier, "johndoe@example.com"),
        new Claim(ClaimTypes.Role, "Administrator"),
    }, "Custom"),
    NotBefore = DateTime.Now,
    SigningCredentials = signingCredentials,
    Issuer = "self",
    IssuedAt = DateTime.Now,
    Expires = DateTime.Now.AddHours(3),
    Audience = "http://my.website.com"
};

var tokenHandler = new JwtSecurityTokenHandler();
var plainToken = tokenHandler.CreateToken(securityTokenDescriptor);
var signedAndEncodedToken = tokenHandler.WriteToken(plainToken);

并验证

var validationParameters = new TokenValidationParameters()
{
     ValidateAudience = true,
     ValidAudience = "http://my.website.com",
     ValidateIssuer = true,
     ValidIssuer = "self",
     ValidateIssuerSigningKey = true,
     IssuerSigningKey = signingKey,
     RequireExpirationTime = true,
     ValidateLifetime = true,
     ClockSkew = TimeSpan.Zero
};
try
{
    SecurityToken mytoken = new JwtSecurityToken();
    var myTokenHandler = new JwtSecurityTokenHandler();
    var myPrincipal = myTokenHandler.ValidateToken(signedAndEncodedToken, validationParameters, out mytoken);
} catch (Exception ex)
{
    System.Diagnostics.Debug.WriteLine("Authentication failed");
}