.NET 5用のIdentityModel拡張を使用してJWTトークンを生成する方法
。NETのIdentityModel Extensions バージョン4を使用して、対称キーおよびSHA256以下のように、完全に機能します：
var tokenDescriptor = new SecurityTokenDescriptor
{
Subject = new ClaimsIdentity(claims),
TokenIssuerName = Issuer,
AppliesToAddress = Audience,
Lifetime = new Lifetime(now, expirationTime),
SigningCredentials = new SigningCredentials(
new InMemorySymmetricSecurityKey(symmetricKey),
"http://www.w3.org/2001/04/xmldsig-more#hmac-sha256",
"http://www.w3.org/2001/04/xmlenc#sha256"),
};
var securityToken = tokenHandler.CreateToken(tokenDescriptor);
var token = tokenHandler.WriteToken(securitytoken);
しかし、以下のコードのように.NET 5用のIdentityModel Extensionsにアップグレードしようとしたとき：
var tokenDescriptor = new SecurityTokenDescriptor
{
Subject = new ClaimsIdentity(claims),
Issuer = Issuer,
Audience = Audience,
Expires = expirationTime,
SigningCredentials = new SigningCredentials(
new SymmetricSecurityKey(symmetricKey), "SHA256")
};
var securityToken = tokenHandler.CreateToken(tokenDescriptor);
var token = tokenHandler.WriteToken(stoken);
私は例外を得ました：
IDX10634：SignatureProviderを作成できません。
SignatureAlgorithm： 'SHA256'、SecurityKey： 'Microsoft.IdentityModel.Tokens.SymmetricSecurityKey'はサポートされていません。
バージョン5を使用した新しいコードの何が問題になっていますか？.
彼らは実装を少し変えたので
変化する
SigningCredentials = new SigningCredentials(
new SymmetricSecurityKey(symmetricKey), "SHA256")
に
SigningCredentials = new SigningCredentials(
new SymmetricSecurityKey(symmetricKey), Microsoft.IdentityModel.Tokens.SecurityAlgorithms.HmacSha256Signature)
これが解決策です、それは働いています
using Microsoft.IdentityModel.Tokens;
using System;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Text;
namespace ConsoleApplication2
{
private class JWT
{
private bool verbose = false;
public string GenerateJWT()
{
DateTime UnixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
// Provide proper private key
string privateSecretKey = "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";
rsa = DecodeRSAPrivateKey(FromBase64Url(privateSecretKey));
//convert to csp format
var bytes = rsa.ExportCspBlob(false);
var publicKey = Convert.ToBase64String(bytes);
//
RsaSecurityKey _signingKey = new RsaSecurityKey(rsa);
Microsoft.IdentityModel.Tokens.SigningCredentials signingCredentials =
new Microsoft.IdentityModel.Tokens.SigningCredentials(_signingKey, SecurityAlgorithms.RsaSha256);
JwtHeader head = new JwtHeader(signingCredentials);
head.Add("kid", "lzo-firstpublickey");
string sNewGuid = Guid.NewGuid().ToString("n");
var claims = new[]
{
new Claim(JwtRegisteredClaimNames.Iss, "s6BhdRkqt3"),
new Claim(JwtRegisteredClaimNames.Sub, "s6BhdRkqt3"),
new Claim(JwtRegisteredClaimNames.Aud, "https://cis.ncrs/connect/token"),
new Claim(JwtRegisteredClaimNames.Jti, sNewGuid),
new Claim(JwtRegisteredClaimNames.Exp, ((Int64)DateTime.Now.AddMinutes(55).Subtract(UnixEpoch).TotalSeconds).ToString(System.Globalization.CultureInfo.InvariantCulture), ClaimValueTypes.Integer64),
new Claim(JwtRegisteredClaimNames.Iat, ((Int64)DateTime.Now.Subtract(UnixEpoch).TotalSeconds).ToString(System.Globalization.CultureInfo.InvariantCulture), ClaimValueTypes.Integer64)
};
JwtPayload payload = new JwtPayload(claims);
JwtSecurityToken jwt = new JwtSecurityToken(head, payload);
jwt.SigningKey = _signingKey;
var encodedJwt = new JwtSecurityTokenHandler().WriteToken(jwt);
return encodedJwt;
}
private static byte[] FromBase64Url(string base64Url)
{
string base64 = string.Empty;
if (!string.IsNullOrEmpty(base64Url))
{
string padded = base64Url.Length % 4 == 0
? base64Url : base64Url + "====".Substring(base64Url.Length % 4);
base64 = padded.Replace("_", "/")
.Replace("-", "+");
}
return Convert.FromBase64String(base64);
}
private RSACryptoServiceProvider DecodeRSAPrivateKey(byte[] privkey)
{
byte[] MODULUS, E, D, P, Q, DP, DQ, IQ;
// --------- Set up stream to decode the asn.1 encoded RSA private key ------
System.IO.MemoryStream mem = new System.IO.MemoryStream(privkey);
System.IO.BinaryReader binr = new System.IO.BinaryReader(mem); //wrap Memory Stream with BinaryReader for easy reading
byte bt = 0;
ushort twobytes = 0;
int elems = 0;
try
{
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8230)
binr.ReadInt16(); //advance 2 bytes
else
return null;
twobytes = binr.ReadUInt16();
if (twobytes != 0x0102) //version number
return null;
bt = binr.ReadByte();
if (bt != 0x00)
return null;
//------ all private key components are Integer sequences ----
elems = GetIntegerSize(binr);
MODULUS = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
E = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
D = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
P = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
Q = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
DP = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
DQ = binr.ReadBytes(elems);
elems = GetIntegerSize(binr);
IQ = binr.ReadBytes(elems);
Console.WriteLine("showing components ..");
if (verbose)
{
showBytes("\nModulus", MODULUS);
showBytes("\nExponent", E);
showBytes("\nD", D);
showBytes("\nP", P);
showBytes("\nQ", Q);
showBytes("\nDP", DP);
showBytes("\nDQ", DQ);
showBytes("\nIQ", IQ);
}
// ------- create RSACryptoServiceProvider instance and initialize with public key -----
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSAParameters RSAparams = new RSAParameters();
RSAparams.Modulus = MODULUS;
RSAparams.Exponent = E;
RSAparams.D = D;
RSAparams.P = P;
RSAparams.Q = Q;
RSAparams.DP = DP;
RSAparams.DQ = DQ;
RSAparams.InverseQ = IQ;
RSA.ImportParameters(RSAparams);
return RSA;
}
catch (Exception)
{
return null;
}
finally
{
binr.Close();
}
}
private void showBytes(String info, byte[] data)
{
Console.WriteLine("{0} [{1} bytes]", info, data.Length);
for (int i = 1; i <= data.Length; i++)
{
Console.Write("{0:X2} ", data[i - 1]);
if (i % 16 == 0)
Console.WriteLine();
}
Console.WriteLine("\n\n");
}
private int GetIntegerSize(System.IO.BinaryReader binr)
{
byte bt = 0;
byte lowbyte = 0x00;
byte highbyte = 0x00;
int count = 0;
bt = binr.ReadByte();
if (bt != 0x02) //expect integer
return 0;
bt = binr.ReadByte();
if (bt == 0x81)
count = binr.ReadByte(); // data size in next byte
else
if (bt == 0x82)
{
highbyte = binr.ReadByte(); // data size in next 2 bytes
lowbyte = binr.ReadByte();
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 };
count = BitConverter.ToInt32(modint, 0);
}
else
{
count = bt; // we already have the data size
}
while (binr.ReadByte() == 0x00)
{ //remove high order zeros in data
count -= 1;
}
binr.BaseStream.Seek(-1, System.IO.SeekOrigin.Current); //last ReadByte wasn't a removed zero, so back up a byte
return count;
}
}
}