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Add modern openssl key functionality #119

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30 changes: 26 additions & 4 deletions application-restricted-signed-jwt-tutorials/csharp/auth/JwtHandler.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,10 @@ public JwtHandler(String keyOrPfx, string audience, string clientId, string kid)
{
_signingCredentials = FromPrivateKey(keyOrPfx, kid);
}
else if (keyOrPfx.EndsWith(".pem"))
{
_signingCredentials = FromPemPrivateKey(keyOrPfx, kid);
}
else
{
throw new Exception("Can not recognise the certificate/key extension");
Expand All @@ -33,13 +37,13 @@ public JwtHandler(String keyOrPfx, string audience, string clientId, string kid)

public string GenerateJwt(int expInMinutes = 1)
{
var now = DateTime.UtcNow;
var now = DateTime.UtcNow;
var token = new JwtSecurityToken(
_clientId,
_audience,
new List<Claim>
{
new("jti", Guid.NewGuid().ToString()),
new(JwtClaimTypes.JwtId, Guid.NewGuid().ToString()),
new(JwtClaimTypes.Subject, _clientId),
},
now,
Expand Down Expand Up @@ -67,10 +71,28 @@ private SigningCredentials FromPrivateKey(string privateKeyPath, string kid)
privateKey = privateKey.Replace("-----BEGIN RSA PRIVATE KEY-----", "");
privateKey = privateKey.Replace("-----END RSA PRIVATE KEY-----", "");
var keyBytes = Convert.FromBase64String(privateKey);

var rsa = RSA.Create();
rsa.ImportRSAPrivateKey(keyBytes, out _);


var rsaSecurityKey = new RsaSecurityKey(rsa)
{
KeyId = kid
};

return new SigningCredentials(rsaSecurityKey, SecurityAlgorithms.RsaSha512)
{
CryptoProviderFactory = new CryptoProviderFactory { CacheSignatureProviders = false }
};
}

private SigningCredentials FromPemPrivateKey(string privteKeyPath, string kid)
{
var privateKey = File.ReadAllText(privteKeyPath);
var rsa = RSA.Create();

rsa.ImportFromPem(privateKey);

var rsaSecurityKey = new RsaSecurityKey(rsa)
{
KeyId = kid
Expand Down