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Fix FIDO2 client bugs (#3056)
* fix: blockedUris null issue * fix: trailing slash in origin breaking check
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@ -32,11 +32,11 @@ namespace Bit.Core.Services
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_makeCredentialUserInterface = makeCredentialUserInterface;
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}
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public async Task<Fido2ClientCreateCredentialResult> CreateCredentialAsync(Fido2ClientCreateCredentialParams createCredentialParams)
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public async Task<Fido2ClientCreateCredentialResult> CreateCredentialAsync(Fido2ClientCreateCredentialParams createCredentialParams)
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{
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var blockedUris = await _stateService.GetAutofillBlacklistedUrisAsync();
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var domain = CoreHelpers.GetHostname(createCredentialParams.Origin);
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if (blockedUris.Contains(domain))
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if (blockedUris != null && blockedUris.Contains(domain))
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{
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throw new Fido2ClientException(
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Fido2ClientException.ErrorCode.UriBlockedError,
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@ -90,7 +90,7 @@ namespace Bit.Core.Services
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{
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// Filter out all unsupported algorithms
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credTypesAndPubKeyAlgs = createCredentialParams.PubKeyCredParams
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.Where(kp => kp.Alg == (int) Fido2AlgorithmIdentifier.ES256 && kp.Type == Constants.DefaultFido2CredentialType)
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.Where(kp => kp.Alg == (int)Fido2AlgorithmIdentifier.ES256 && kp.Type == Constants.DefaultFido2CredentialType)
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.ToArray();
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}
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else
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@ -107,7 +107,8 @@ namespace Bit.Core.Services
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throw new Fido2ClientException(Fido2ClientException.ErrorCode.NotSupportedError, "No supported algorithms found");
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}
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var clientDataJSON = JsonSerializer.Serialize(new {
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var clientDataJSON = JsonSerializer.Serialize(new
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{
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type = "webauthn.create",
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challenge = CoreHelpers.Base64UrlEncode(createCredentialParams.Challenge),
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origin = createCredentialParams.Origin,
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@ -118,10 +119,12 @@ namespace Bit.Core.Services
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var clientDataHash = await _cryptoFunctionService.HashAsync(clientDataJSONBytes, CryptoHashAlgorithm.Sha256);
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var makeCredentialParams = MapToMakeCredentialParams(createCredentialParams, credTypesAndPubKeyAlgs, clientDataHash);
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try {
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try
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{
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var makeCredentialResult = await _fido2AuthenticatorService.MakeCredentialAsync(makeCredentialParams, _makeCredentialUserInterface);
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return new Fido2ClientCreateCredentialResult {
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return new Fido2ClientCreateCredentialResult
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{
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CredentialId = makeCredentialResult.CredentialId,
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AttestationObject = makeCredentialResult.AttestationObject,
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AuthData = makeCredentialResult.AuthData,
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@ -130,9 +133,13 @@ namespace Bit.Core.Services
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PublicKeyAlgorithm = makeCredentialResult.PublicKeyAlgorithm,
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Transports = createCredentialParams.Rp.Id == "google.com" ? ["internal", "usb"] : ["internal"] // workaround for a bug on Google's side
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};
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} catch (InvalidStateError) {
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}
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catch (InvalidStateError)
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{
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throw new Fido2ClientException(Fido2ClientException.ErrorCode.InvalidStateError, "Unknown invalid state encountered");
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} catch (Exception) {
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}
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catch (Exception)
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{
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throw new Fido2ClientException(Fido2ClientException.ErrorCode.UnknownError, $"An unknown error occurred");
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}
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}
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@ -141,7 +148,7 @@ namespace Bit.Core.Services
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{
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var blockedUris = await _stateService.GetAutofillBlacklistedUrisAsync();
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var domain = CoreHelpers.GetHostname(assertCredentialParams.Origin);
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if (blockedUris.Contains(domain))
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if (blockedUris != null && blockedUris.Contains(domain))
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{
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throw new Fido2ClientException(
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Fido2ClientException.ErrorCode.UriBlockedError,
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@ -176,7 +183,8 @@ namespace Bit.Core.Services
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"RP ID cannot be used with this origin");
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}
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var clientDataJSON = JsonSerializer.Serialize(new {
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var clientDataJSON = JsonSerializer.Serialize(new
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{
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type = "webauthn.get",
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challenge = CoreHelpers.Base64UrlEncode(assertCredentialParams.Challenge),
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origin = assertCredentialParams.Origin,
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@ -186,10 +194,12 @@ namespace Bit.Core.Services
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var clientDataHash = await _cryptoFunctionService.HashAsync(clientDataJSONBytes, CryptoHashAlgorithm.Sha256);
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var getAssertionParams = MapToGetAssertionParams(assertCredentialParams, clientDataHash);
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try {
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try
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{
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var getAssertionResult = await _fido2AuthenticatorService.GetAssertionAsync(getAssertionParams, _getAssertionUserInterface);
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return new Fido2ClientAssertCredentialResult {
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return new Fido2ClientAssertCredentialResult
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{
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AuthenticatorData = getAssertionResult.AuthenticatorData,
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ClientDataJSON = clientDataJSONBytes,
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Id = CoreHelpers.Base64UrlEncode(getAssertionResult.SelectedCredential.Id),
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@ -197,9 +207,13 @@ namespace Bit.Core.Services
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Signature = getAssertionResult.Signature,
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UserHandle = getAssertionResult.SelectedCredential.UserHandle
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};
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} catch (InvalidStateError) {
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}
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catch (InvalidStateError)
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{
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throw new Fido2ClientException(Fido2ClientException.ErrorCode.InvalidStateError, "Unknown invalid state encountered");
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} catch (Exception) {
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}
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catch (Exception)
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{
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throw new Fido2ClientException(Fido2ClientException.ErrorCode.UnknownError, $"An unknown error occurred");
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}
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@ -215,12 +229,13 @@ namespace Bit.Core.Services
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createCredentialParams.AuthenticatorSelection?.ResidentKey == "preferred" ||
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(createCredentialParams.AuthenticatorSelection?.ResidentKey == null &&
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createCredentialParams.AuthenticatorSelection?.RequireResidentKey == true);
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var requireUserVerification = createCredentialParams.AuthenticatorSelection?.UserVerification == "required" ||
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createCredentialParams.AuthenticatorSelection?.UserVerification == "preferred" ||
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createCredentialParams.AuthenticatorSelection?.UserVerification == null;
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return new Fido2AuthenticatorMakeCredentialParams {
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return new Fido2AuthenticatorMakeCredentialParams
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{
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RequireResidentKey = requireResidentKey,
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RequireUserVerification = requireUserVerification,
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ExcludeCredentialDescriptorList = createCredentialParams.ExcludeCredentials,
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@ -240,7 +255,8 @@ namespace Bit.Core.Services
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assertCredentialParams.UserVerification == "preferred" ||
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assertCredentialParams.UserVerification == null;
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return new Fido2AuthenticatorGetAssertionParams {
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return new Fido2AuthenticatorGetAssertionParams
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{
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RpId = assertCredentialParams.RpId,
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Challenge = assertCredentialParams.Challenge,
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AllowCredentialDescriptorList = assertCredentialParams.AllowCredentials,
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@ -16,18 +16,18 @@ namespace Bit.Core.Utilities.Fido2
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// We only care about the domain part of the origin, not the protocol or port so we remove them here,
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// while still keeping ipv6 intact.
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// https is enforced in the client, so we don't need to worry about that here
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var originWithoutProtocolOrPort = Regex.Replace(origin, @"(https?://)?([^:/]+)(:\d+)?(/.*)?", "$2$4");
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if (Uri.CheckHostName(rpId) != UriHostNameType.Dns || Uri.CheckHostName(originWithoutProtocolOrPort) != UriHostNameType.Dns)
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var originWithoutProtocolPortOrPath = Regex.Replace(origin, @"(https?://)?([^:/]+)(:\d+)?(/.*)?$", "$2");
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if (Uri.CheckHostName(rpId) != UriHostNameType.Dns || Uri.CheckHostName(originWithoutProtocolPortOrPath) != UriHostNameType.Dns)
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{
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return false;
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}
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if (rpId == originWithoutProtocolOrPort)
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if (rpId == originWithoutProtocolPortOrPath)
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{
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return true;
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}
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if (!DomainName.TryParse(rpId, out var parsedRpId) || !DomainName.TryParse(originWithoutProtocolOrPort, out var parsedOrgin))
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if (!DomainName.TryParse(rpId, out var parsedRpId) || !DomainName.TryParse(originWithoutProtocolPortOrPath, out var parsedOrgin))
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{
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return false;
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}
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@ -37,6 +37,17 @@ namespace Bit.Core.Test.Utilities.Fido2
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[InlineData("bitwarden.com", "https://login.bitwarden.com:1337", true)]
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[InlineData("login.bitwarden.com", "https://login.bitwarden.com:1337", true)]
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[InlineData("login.bitwarden.com", "https://sub.login.bitwarden.com:1337", true)]
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// Origin with trailing slash
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[InlineData("sub.login.bitwarden.com", "https://login.bitwarden.com:1337/", false)]
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[InlineData("passwordless.dev", "https://login.bitwarden.com:1337/", false)]
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[InlineData("login.passwordless.dev", "https://login.bitwarden.com:1337/", false)]
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[InlineData("bitwarden", "localhost/", false)]
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[InlineData("bitwarden", "bitwarden/", true)]
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[InlineData("localhost", "https://localhost:8080/", true)]
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[InlineData("bitwarden.com", "https://bitwarden.com/", true)]
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[InlineData("bitwarden.com", "https://login.bitwarden.com:1337/", true)]
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[InlineData("login.bitwarden.com", "https://login.bitwarden.com:1337/", true)]
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[InlineData("login.bitwarden.com", "https://sub.login.bitwarden.com:1337/", true)]
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public void ValidateRpId(string rpId, string origin, bool isValid)
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{
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Assert.Equal(isValid, Fido2DomainUtils.IsValidRpId(rpId, origin));
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