public async Task ValidES256Signature_Unsupported()
{
var ex = await Assert.ThrowsAsync <InvalidOperationException>(() => JsonWebSignature.VerifySignedTokenAsync(
FakeCertificateCache.Es256ForIap, BuildOptions(new MockClock(FakeCertificateCache.ValidEs256ForIap))));
Assert.Equal("ES256 signed token verification is not supported in this platform.", ex.Message);
}
public async Task ValidAudience()
{
var options = BuildOptions(trustedAudiences: new string[] { "233772281425-ab2mcbiqmv8kh0mdnqsrkrod97qk37h0.apps.googleusercontent.com" });
var payload = await JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, options);
Assert.NotNull(payload);
}
public void POST_Nonce_Empty()
{
AcmeResponse response = null;
using var provider = Application.CreateProvider();
IAcmeController controller = (IAcmeController)provider.GetService(typeof(IAcmeController));
var accountKey = RSA.Create(2048);
var token = new JsonWebSignature();
token.SetProtected(new JsonWebSignatureProtected
{
Url = $"{Application.BaseAddress}new-acct",
Algorithm = AlgorithmsEnum.RS256,
Key = new JsonWebKey(accountKey),
});
token.Sign(accountKey);
response = controller.CreateAccount(new AcmeRequest
{
Path = $"{Application.BaseAddress}new-acct",
Method = "POST",
Token = token,
});
Assert.Equal(400, response.StatusCode);
var content = response.GetContent <Protocol.Error>();
Assert.Equal(Protocol.ErrorType.Malformed, content.Type);
Assert.NotNull(content.Detail);
}
/// <summary>
/// Rotates the current Public key that is associated with this Account by the target ACME CA with a new Public key.
/// </summary>
/// <see cref="https://tools.ietf.org/html/draft-ietf-acme-acme-18#section-7.3.5"/>
public async Task <AcmeResponse <Protocol.Account> > AccountChangeKeyAsync(AsymmetricAlgorithm keyNew)
{
Logger.Info("Changing an ACME account key. Params:{@params}", keyNew);
var jws = new JsonWebSignature();
var jwk = new JsonWebKey(Key);
var jwkNew = new JsonWebKey(keyNew);
jws.SetPayload(new Protocol.Messages.ChangeKey
{
Account = Location,
Key = jwk,
});
jws.SetProtected(new JsonWebSignatureProtected
{
Algorithm = AlgorithmsEnum.RS256,
Url = Directory.KeyChange,
Key = jwkNew,
});
jws.Sign(keyNew);
var response = await Request(GetType(typeof(Protocol.Account)), Directory.KeyChange,
new RequestParams
{
Method = HttpMethod.Post,
Payload = jws
});
Key = keyNew;
return(response);
}
public async Task OidcTokenProvider_ComputeCredential()
{
// This test only executes on GCE so we are certain to have a ComputeCredential.
GoogleCredential credential = GoogleCredential.FromComputeCredential();
OidcToken token = await credential.GetOidcTokenAsync(
OidcTokenOptions.FromTargetAudience("https://this.is.a.test"));
// Check an access token (really id_token) is available.
Assert.NotNull(await token.GetAccessTokenAsync());
// If IdToken is set and AccessToken is not, AccessToken is set to
// IdToken, so we can always check here that AccessToken is not null.
Assert.NotNull(token.TokenResponse.AccessToken);
// The enpoint does not send an expiry, bu we set it to the id_token
// expiry.
Assert.NotNull(token.TokenResponse.ExpiresInSeconds);
var verificationOptions = new SignedTokenVerificationOptions();
verificationOptions.TrustedAudiences.Add("https://this.is.a.test");
var payload = await JsonWebSignature.VerifySignedTokenAsync(await token.GetAccessTokenAsync(), verificationOptions);
Assert.NotNull(payload);
Assert.Contains("https://this.is.a.test", payload.AudienceAsList);
}
public async Task Validate_Signature_Time()
{
var clockInvalid1 = new MockClock(FakeCertificateCache.BeforeValidJwtGoogleSigned);
var clockValid1 = new MockClock(FakeCertificateCache.ValidJwtGoogleSigned);
var clockInvalid2 = new MockClock(FakeCertificateCache.AfterValidJwtGoogleSigned);
// Test with no tolerance
Assert.NotNull(await JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, BuildOptions(clockValid1)));
var ex1 = await Assert.ThrowsAsync <InvalidJwtException>(() =>
JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, BuildOptions(clockInvalid1)));
Assert.Equal("JWT is not yet valid.", ex1.Message);
var ex2 = await Assert.ThrowsAsync <InvalidJwtException>(() =>
JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, BuildOptions(clockInvalid2)));
Assert.Equal("JWT has expired.", ex2.Message);
// Test with tolerance
await Assert.ThrowsAsync <InvalidJwtException>(() =>
JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, BuildOptions(clockInvalid1, clockTolerance: TimeSpan.FromSeconds(109))));
Assert.NotNull(await JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, BuildOptions(clockInvalid1, clockTolerance: TimeSpan.FromSeconds(111))));
Assert.NotNull(await JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, BuildOptions(clockInvalid2, clockTolerance: TimeSpan.FromSeconds(11))));
await Assert.ThrowsAsync <InvalidJwtException>(() =>
JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, BuildOptions(clockInvalid2, clockTolerance: TimeSpan.FromSeconds(9))));
}
/// <summary>
/// Account create with external account binding.
/// </summary>
/// <see cref="https://tools.ietf.org/html/draft-ietf-acme-acme-12#section-7.3.5"/>
public async Task <AcmeResponse <Protocol.Account> > AccountCreateAsync(Protocol.Messages.NewAccount account, string kid, string keyMac)
{
Logger.Info("Creating a new ACME account with external account binding. Params:{@params}", new
{
Account = account,
KeyId = kid,
KeyMac = keyMac,
});
var jws = new JsonWebSignature();
jws.SetProtected(new JsonWebSignatureProtected
{
Algorithm = AlgorithmsEnum.HS256,
KeyID = kid,
Url = Directory.NewAccount,
});
jws.SetPayload(new JsonWebKey(Key));
var key = HMAC.Create("HMACSHA256");
key.Key = Base64Url.Decode(keyMac);
jws.Sign(key);
account.ExternalAccountBinding = jws;
return(await AccountCreateAsync(account));
}
public async Task InvalidAudience()
{
var options = BuildOptions(trustedAudiences: new string[] { "audience1", "audience2" });
var ex = await Assert.ThrowsAsync <InvalidJwtException>(() =>
JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, options));
Assert.Equal("JWT contains untrusted 'aud' claim.", ex.Message);
}
public async Task ValidRS256Signature_CustomPayload()
{
var payload = await JsonWebSignature.VerifySignedTokenAsync <CustomPayload>(FakeCertificateCache.JwtGoogleSigned, BuildOptions());
Assert.NotNull(payload);
Assert.NotNull(payload.AuthorizedParty);
Assert.NotEmpty(payload.AuthorizedParty);
}
public async Task InvalidIssuer()
{
var options = BuildOptions(trustedIssuers: new string[] { "issuer1", "issuer2" });
var ex = await Assert.ThrowsAsync <InvalidJwtException>(() =>
JsonWebSignature.VerifySignedTokenAsync(FakeCertificateCache.JwtGoogleSigned, options));
Assert.Equal("JWT issuer incorrect. Must be one of: 'issuer1', 'issuer2'", ex.Message);
}
public async Task WrongAlgorithm()
{
string jwt = $"{UrlSafeBase64Encode("{\"alg\":\"HS256\"}")}.{UrlSafeBase64Encode("{}")}.";
var ex = await Assert.ThrowsAsync <InvalidJwtException>(() =>
JsonWebSignature.VerifySignedTokenAsync(jwt, BuildOptions()));
Assert.Equal("Signing algorithm must be either RS256 or ES256.", ex.Message);
}
public ActionResult PostOrders([FromBody] JsonWebSignature token)
{
var response = Controller.PostOrders(GetAcmeRequest(token));
ProcessOrders(response);
return(CreateActionResult(response));
}
private AcmeRequest GetAcmeRequest(JsonWebSignature token)
{
return(new AcmeRequest(token)
{
Method = Request.Method,
Query = GetQuery(),
Path = UriHelper.GetDisplayUrl(Request),
});
}
protected AcmeRequest GetAcmeRequest(JsonWebSignature token)
{
return(new AcmeRequest(token)
{
Method = Request.Method.Method,
Query = GetQuery(),
Path = Request.RequestUri.ToString(),
});
}
public async Task InvalidES256Signature_Unsupported()
{
// Lets just change the last character of the signed token to break the signature.
// But Headers and Payload are still valid so we guarantee that the only
// failure comes from the signature being invalid.
// The last character was an A, changing for a 4. If at some point the token used in tests changes
// and the new token ends in anything but a 4, this test will still be valid. If the new token ends in a 4
// this test will fail and then we'll have to replace the 4 by an A or any other character.
var invalidToken = FakeCertificateCache.Es256ForIap.Substring(0, FakeCertificateCache.Es256ForIap.Length - 1) + "4";
var ex = await Assert.ThrowsAsync <InvalidOperationException>(() =>
JsonWebSignature.VerifySignedTokenAsync(invalidToken, BuildOptions(new MockClock(FakeCertificateCache.ValidEs256ForIap))));
Assert.Equal("ES256 signed token verification is not supported in this platform.", ex.Message);
}
public async Task InvalidRS256Signature()
{
// Lets just change the last character of the Google signed token to break the signature.
// But Headers and Payload are still valid for a Google token so we guarantee that the only
// failure comes from the signature being invalid.
// The last character was a Q, changing for a 4. If at some point the token used in tests changes
// and the new token ends in anything but a 4, this test will still be valid. If the new token ends in a 4
// this test will fail and then we'll have to replace the 4 by a Q or any other character.
var invalidToken = FakeCertificateCache.JwtGoogleSigned.Substring(0, FakeCertificateCache.JwtGoogleSigned.Length - 1) + "4";
var ex = await Assert.ThrowsAsync <InvalidJwtException>(() =>
JsonWebSignature.VerifySignedTokenAsync(invalidToken, BuildOptions()));
Assert.Equal("JWT invalid, unable to verify signature.", ex.Message);
}
public void Account_New_TermsOfService_Enabled_TermsOfServiceAgreed_False()
{
AcmeResponse response = null;
using var provider = Application.CreateProvider(o =>
{
o.TermsOfService = "https://some.com/acme/terms.pdf";
});
IAcmeController controller = (IAcmeController)provider.GetService(typeof(IAcmeController));
// Get nonce
response = controller.GetNonce(new AcmeRequest
{
Path = $"{Application.BaseAddress}new-nonce",
Method = "HEAD",
});
// Create token
var accountKey = RSA.Create(2048);
var token = new JsonWebSignature();
token.SetProtected(new JsonWebSignatureProtected
{
Url = $"{Application.BaseAddress}new-acct",
Algorithm = AlgorithmsEnum.RS256,
Key = new JsonWebKey(accountKey),
Nonce = response.Headers.ReplayNonce,
});
token.SetPayload(new NewAccount
{
Contacts = new string[] { "mailto:[email protected]" },
TermsOfServiceAgreed = false,
});
token.Sign(accountKey);
// Create account
response = controller.CreateAccount(new AcmeRequest
{
Path = $"{Application.BaseAddress}new-acct",
Method = "POST",
Token = token,
});
Assert.Equal(400, response.StatusCode);
var content = response.GetContent <Protocol.Error>();
Assert.Equal(Protocol.ErrorType.Malformed, content.Type);
Assert.NotNull(content.Detail);
}
/// <summary>
/// Verifies a signed jwt token and returns its payload.
/// </summary>
/// <param name="signedJwt">The token to verify.</param>
/// <param name="expectedAudience">The audience that the token should be meant for.
/// Validation will fail if that's not the case.</param>
/// <param name="cancellationToken">The cancellation token to propagate cancellation requests.</param>
/// <returns>A task that when completed will have as its result the payload of the verified token.</returns>
/// <exception cref="InvalidJwtException">If verification failed. The message of the exception will contain
/// information as to why the token failed.</exception>
public async Task <JsonWebSignature.Payload> VerifyTokenAsync(
string signedJwt, string expectedAudience, CancellationToken cancellationToken = default)
{
SignedTokenVerificationOptions options = new SignedTokenVerificationOptions
{
// Use clock tolerance to account for possible clock differences
// between the issuer and the verifier.
IssuedAtClockTolerance = TimeSpan.FromMinutes(1),
ExpiryClockTolerance = TimeSpan.FromMinutes(1),
TrustedAudiences = { expectedAudience }
};
return(await JsonWebSignature.VerifySignedTokenAsync(signedJwt, options, cancellationToken : cancellationToken));
}
public void Account_New_TermsOfService_Disabled()
{
AcmeResponse response = null;
using var provider = Application.CreateProvider();
IAcmeController controller = (IAcmeController)provider.GetService(typeof(IAcmeController));
// Get nonce
response = controller.GetNonce(new AcmeRequest
{
Path = $"{Application.BaseAddress}new-nonce",
Method = "HEAD",
});
// Create token
var accountKey = RSA.Create(2048);
var token = new JsonWebSignature();
token.SetProtected(new JsonWebSignatureProtected
{
Url = $"{Application.BaseAddress}new-acct",
Algorithm = AlgorithmsEnum.RS256,
Key = new JsonWebKey(accountKey),
Nonce = response.Headers.ReplayNonce,
});
token.SetPayload(new NewAccount
{
Contacts = new string[] { "mailto:[email protected]" },
});
token.Sign(accountKey);
// Create account
response = controller.CreateAccount(new AcmeRequest
{
Path = $"{Application.BaseAddress}new-acct",
Method = "POST",
Token = token,
});
Assert.Equal(201, response.StatusCode);
var content = response.GetContent <Protocol.Account>();
Assert.Single(response.Headers.Link);
Assert.Equal("https://test.server.com/acme/acct/1", response.Headers.Location);
Assert.NotNull(content);
Assert.NotNull(content.Key);
Assert.Null(content.TermsOfServiceAgreed);
}
public ActionResult GetCertificate([FromBody] JsonWebSignature token, string id)
{
var response = Controller.GetCertificate(GetAcmeRequest(token), id);
if (response.Content is MediaTypeContent content)
{
foreach (var header in response.Headers.AllKeys)
{
Response.Headers.Add(header, response.Headers.Get(header));
}
return(new FileStreamResult(content.Content, content.Type));
}
else
{
return(CreateActionResult(response));
}
}
public void POST_Url_WrongTargetUrl()
{
/// The value of the "url" header
/// parameter MUST be a string representing the target URL
AcmeResponse response = null;
using var provider = Application.CreateProvider();
IAcmeController controller = (IAcmeController)provider.GetService(typeof(IAcmeController));
// Get nonce
response = controller.GetNonce(new AcmeRequest
{
Path = $"{Application.BaseAddress}new-nonce",
Method = "HEAD",
});
var accountKey = RSA.Create(2048);
var token = new JsonWebSignature();
token.SetProtected(new JsonWebSignatureProtected
{
Url = "https://wrong.com/acme/new-account",
Nonce = response.Headers.ReplayNonce,
Algorithm = AlgorithmsEnum.RS256,
Key = new JsonWebKey(accountKey),
});
token.Sign(accountKey);
response = controller.CreateAccount(new AcmeRequest
{
Path = $"{Application.BaseAddress}new-acct",
Method = "POST",
Token = token,
});
Assert.Equal(400, response.StatusCode);
var content = response.GetContent <Protocol.Error>();
Assert.Equal(Protocol.ErrorType.Malformed, content.Type);
Assert.NotNull(content.Detail);
}
/// <inheritdoc/>
public IExternalAccount Validate(JsonWebKey accountKey, JsonWebSignature token)
{
#region Check arguments
if (accountKey is null)
{
throw new ArgumentNullException(nameof(accountKey));
}
if (token is null)
{
throw new ArgumentNullException(nameof(token));
}
#endregion
var @prtoected = token.GetProtected();
var eabPayload = token.GetPayload <JsonWebKey>();
if (!eabPayload.Equals(accountKey))
{
throw new MalformedException("Signed content in externalAccountBinding doesn't match to requirement"); // TODO check rfc error
}
var externalAccount = GetById(@prtoected.KeyID);
if (externalAccount.Status != Protocol.ExternalAccountStatus.Pending)
{
throw new MalformedException("External account has wrong status"); // TODO check rfc error
}
var key = Base64Url.Decode(externalAccount.Key);
externalAccount.Status = token.Verify(key)
? Protocol.ExternalAccountStatus.Valid
: Protocol.ExternalAccountStatus.Invalid;
ExternalAccountRepository.Update(externalAccount);
Logger.Info("External account {id} status updated to {status}", externalAccount.Id, externalAccount.Status);
return(externalAccount);
}
public async Task <string> Run(string targetAudience, string credentialsFilePath, string uri)
{
ServiceAccountCredential saCredential;
using (var fs = new FileStream(credentialsFilePath, FileMode.Open, FileAccess.Read))
{
saCredential = ServiceAccountCredential.FromServiceAccountData(fs);
}
OidcToken oidcToken = await saCredential.GetOidcTokenAsync(OidcTokenOptions.FromTargetAudience(targetAudience).WithTokenFormat(OidcTokenFormat.Standard)).ConfigureAwait(false);
string token = await oidcToken.GetAccessTokenAsync().ConfigureAwait(false);
// the following snippet verifies an id token.
// this step is done on the receiving end of the oidc endpoint
// adding this step in here as just as a demo on how to do this
//var options = SignedTokenVerificationOptions.Default;
SignedTokenVerificationOptions options = new SignedTokenVerificationOptions
{
IssuedAtClockTolerance = TimeSpan.FromMinutes(1),
ExpiryClockTolerance = TimeSpan.FromMinutes(1),
TrustedAudiences = { targetAudience },
CertificatesUrl = "https://www.googleapis.com/oauth2/v3/certs" // default value
};
var payload = await JsonWebSignature.VerifySignedTokenAsync(token, options);
Console.WriteLine("Verified with audience " + payload.Audience);
// end verification
// use the token
using (var httpClient = new HttpClient())
{
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
string response = await httpClient.GetStringAsync(uri).ConfigureAwait(false);
Console.WriteLine(response);
return(response);
}
}
public void POST_Nonce_WrongEncoding()
{
AcmeResponse response = null;
using var provider = Application.CreateProvider();
IAcmeController controller = (IAcmeController)provider.GetService(typeof(IAcmeController));
var accountKey = RSA.Create(2048);
var token = new JsonWebSignature();
token.SetProtected(new JsonWebSignatureProtected
{
Url = $"{Application.BaseAddress}new-acct",
Algorithm = AlgorithmsEnum.RS256,
Key = new JsonWebKey(accountKey),
Nonce = "Wrong encoded nonce"
});
token.Sign(accountKey);
response = controller.CreateAccount(new AcmeRequest
{
Path = $"{Application.BaseAddress}new-acct",
Method = "POST",
Token = token,
});
// If the value of a "nonce" header parameter is not valid
// according to this encoding, then the verifier MUST reject the JWS as
// malformed.
Assert.Equal(400, response.StatusCode);
var content = response.GetContent <Protocol.Error>();
Assert.Equal(Protocol.ErrorType.Malformed, content.Type);
Assert.NotNull(content.Detail);
}
/// <summary>
/// Signs JWT token using the private key and returns the serialized assertion.
/// </summary>
/// <param name="payload">the JWT payload to sign.</param>
private string CreateAssertionFromPayload(JsonWebSignature.Payload payload)
{
string serializedHeader = CreateSerializedHeader();
string serializedPayload = NewtonsoftJsonSerializer.Instance.Serialize(payload);
StringBuilder assertion = new StringBuilder();
assertion.Append(UrlSafeBase64Encode(serializedHeader))
.Append(".")
.Append(UrlSafeBase64Encode(serializedPayload));
// Sign the header and the payload.
var hashAlg = new SHA256CryptoServiceProvider();
byte[] assertionHash = hashAlg.ComputeHash(Encoding.ASCII.GetBytes(assertion.ToString()));
var signature = UrlSafeBase64Encode(key.SignHash(assertionHash, "2.16.840.1.101.3.4.2.1" /* SHA256 OIG */));
assertion.Append(".").Append(signature);
return assertion.ToString();
}
/// <summary>
/// Signs JWT token using the private key and returns the serialized assertion.
/// </summary>
/// <param name="payload">the JWT payload to sign.</param>
private string CreateAssertionFromPayload(JsonWebSignature.Payload payload)
{
string serializedHeader = CreateSerializedHeader();
string serializedPayload = NewtonsoftJsonSerializer.Instance.Serialize(payload);
StringBuilder assertion = new StringBuilder();
assertion.Append(UrlSafeBase64Encode(serializedHeader))
.Append(".")
.Append(UrlSafeBase64Encode(serializedPayload));
// Sign the header and the payload.
var hashAlg = SHA256.Create();
byte[] assertionHash = hashAlg.ComputeHash(Encoding.ASCII.GetBytes(assertion.ToString()));
#if NETSTANDARD
var sigBytes = key.SignHash(assertionHash, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
#else
var sigBytes = key.SignHash(assertionHash, Sha256Oig);
#endif
var signature = UrlSafeBase64Encode(sigBytes);
assertion.Append(".").Append(signature);
return assertion.ToString();
}
public async Task ValidES256Signature() =>
Assert.NotNull(await JsonWebSignature.VerifySignedTokenAsync(
FakeCertificateCache.Es256ForIap, BuildOptions(new MockClock(FakeCertificateCache.ValidEs256ForIap))));
public async Task ValidRS256Signature() =>
Assert.NotNull(await JsonWebSignature.VerifySignedTokenAsync(
FakeCertificateCache.JwtGoogleSigned, BuildOptions()));
public ActionResult RevokeCertificate([FromBody] JsonWebSignature token)
{
var response = Controller.RevokeCertificate(GetAcmeRequest(token));
return(CreateActionResult(response));
}
public async Task TwoPartToken() =>
await Assert.ThrowsAsync <InvalidJwtException>(() =>
JsonWebSignature.VerifySignedTokenAsync("header.payload", BuildOptions()));
public async Task EmptyToken() =>
await Assert.ThrowsAsync <ArgumentException>(() =>
JsonWebSignature.VerifySignedTokenAsync("", BuildOptions()));
public async Task NullToken() =>
await Assert.ThrowsAsync <ArgumentNullException>(() =>
JsonWebSignature.VerifySignedTokenAsync(null, BuildOptions()));
