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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#ifndef __WEBAUTHN_H_
+#define __WEBAUTHN_H_
+
+#pragma once
+
+#include <winapifamily.h>
+
+#ifdef _MSC_VER
+#pragma region Desktop Family or OneCore Family
+#endif
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef WINAPI
+#define WINAPI __stdcall
+#endif
+
+#ifndef INITGUID
+#define INITGUID
+#include <guiddef.h>
+#undef INITGUID
+#else
+#include <guiddef.h>
+#endif
+
+//+------------------------------------------------------------------------------------------
+// API Version Information.
+// Caller should check for WebAuthNGetApiVersionNumber to check the presence of relevant APIs
+// and features for their usage.
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_API_VERSION_1 1
+// WEBAUTHN_API_VERSION_1 : Baseline Version
+// Data Structures and their sub versions:
+// - WEBAUTHN_RP_ENTITY_INFORMATION : 1
+// - WEBAUTHN_USER_ENTITY_INFORMATION : 1
+// - WEBAUTHN_CLIENT_DATA : 1
+// - WEBAUTHN_COSE_CREDENTIAL_PARAMETER : 1
+// - WEBAUTHN_COSE_CREDENTIAL_PARAMETERS : Not Applicable
+// - WEBAUTHN_CREDENTIAL : 1
+// - WEBAUTHN_CREDENTIALS : Not Applicable
+// - WEBAUTHN_CREDENTIAL_EX : 1
+// - WEBAUTHN_CREDENTIAL_LIST : Not Applicable
+// - WEBAUTHN_EXTENSION : Not Applicable
+// - WEBAUTHN_EXTENSIONS : Not Applicable
+// - WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS : 3
+// - WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS : 4
+// - WEBAUTHN_COMMON_ATTESTATION : 1
+// - WEBAUTHN_CREDENTIAL_ATTESTATION : 3
+// - WEBAUTHN_ASSERTION : 1
+// Extensions:
+// - WEBAUTHN_EXTENSIONS_IDENTIFIER_HMAC_SECRET
+// APIs:
+// - WebAuthNGetApiVersionNumber
+// - WebAuthNIsUserVerifyingPlatformAuthenticatorAvailable
+// - WebAuthNAuthenticatorMakeCredential
+// - WebAuthNAuthenticatorGetAssertion
+// - WebAuthNFreeCredentialAttestation
+// - WebAuthNFreeAssertion
+// - WebAuthNGetCancellationId
+// - WebAuthNCancelCurrentOperation
+// - WebAuthNGetErrorName
+// - WebAuthNGetW3CExceptionDOMError
+
+#define WEBAUTHN_API_VERSION_2 2
+// WEBAUTHN_API_VERSION_2 : Delta From WEBAUTHN_API_VERSION_1
+// Added Extensions:
+// - WEBAUTHN_EXTENSIONS_IDENTIFIER_CRED_PROTECT
+//
+
+#define WEBAUTHN_API_VERSION_3 3
+// WEBAUTHN_API_VERSION_3 : Delta From WEBAUTHN_API_VERSION_2
+// Data Structures and their sub versions:
+// - WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS : 4
+// - WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS : 5
+// - WEBAUTHN_CREDENTIAL_ATTESTATION : 4
+// - WEBAUTHN_ASSERTION : 2
+// Added Extensions:
+// - WEBAUTHN_EXTENSIONS_IDENTIFIER_CRED_BLOB
+// - WEBAUTHN_EXTENSIONS_IDENTIFIER_MIN_PIN_LENGTH
+//
+
+#define WEBAUTHN_API_VERSION_4 4
+// WEBAUTHN_API_VERSION_4 : Delta From WEBAUTHN_API_VERSION_3
+// Data Structures and their sub versions:
+// - WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS : 5
+// - WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS : 6
+// - WEBAUTHN_ASSERTION : 3
+// APIs:
+// - WebAuthNGetPlatformCredentialList
+// - WebAuthNFreePlatformCredentialList
+//
+
+#define WEBAUTHN_API_CURRENT_VERSION WEBAUTHN_API_VERSION_4
+
+//+------------------------------------------------------------------------------------------
+// Information about an RP Entity
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_RP_ENTITY_INFORMATION_CURRENT_VERSION 1
+
+typedef struct _WEBAUTHN_RP_ENTITY_INFORMATION {
+ // Version of this structure, to allow for modifications in the future.
+ // This field is required and should be set to CURRENT_VERSION above.
+ DWORD dwVersion;
+
+ // Identifier for the RP. This field is required.
+ PCWSTR pwszId;
+
+ // Contains the friendly name of the Relying Party, such as "Acme Corporation", "Widgets Inc" or "Awesome Site".
+ // This field is required.
+ PCWSTR pwszName;
+
+ // Optional URL pointing to RP's logo.
+ PCWSTR pwszIcon;
+} WEBAUTHN_RP_ENTITY_INFORMATION, *PWEBAUTHN_RP_ENTITY_INFORMATION;
+typedef const WEBAUTHN_RP_ENTITY_INFORMATION *PCWEBAUTHN_RP_ENTITY_INFORMATION;
+
+//+------------------------------------------------------------------------------------------
+// Information about an User Entity
+//-------------------------------------------------------------------------------------------
+#define WEBAUTHN_MAX_USER_ID_LENGTH 64
+
+#define WEBAUTHN_USER_ENTITY_INFORMATION_CURRENT_VERSION 1
+
+typedef struct _WEBAUTHN_USER_ENTITY_INFORMATION {
+ // Version of this structure, to allow for modifications in the future.
+ // This field is required and should be set to CURRENT_VERSION above.
+ DWORD dwVersion;
+
+ // Identifier for the User. This field is required.
+ DWORD cbId;
+ _Field_size_bytes_(cbId)
+ PBYTE pbId;
+
+ // Contains a detailed name for this account, such as "john.p.smith@example.com".
+ PCWSTR pwszName;
+
+ // Optional URL that can be used to retrieve an image containing the user's current avatar,
+ // or a data URI that contains the image data.
+ PCWSTR pwszIcon;
+
+ // For User: Contains the friendly name associated with the user account by the Relying Party, such as "John P. Smith".
+ PCWSTR pwszDisplayName;
+} WEBAUTHN_USER_ENTITY_INFORMATION, *PWEBAUTHN_USER_ENTITY_INFORMATION;
+typedef const WEBAUTHN_USER_ENTITY_INFORMATION *PCWEBAUTHN_USER_ENTITY_INFORMATION;
+
+//+------------------------------------------------------------------------------------------
+// Information about client data.
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_HASH_ALGORITHM_SHA_256 L"SHA-256"
+#define WEBAUTHN_HASH_ALGORITHM_SHA_384 L"SHA-384"
+#define WEBAUTHN_HASH_ALGORITHM_SHA_512 L"SHA-512"
+
+#define WEBAUTHN_CLIENT_DATA_CURRENT_VERSION 1
+
+typedef struct _WEBAUTHN_CLIENT_DATA {
+ // Version of this structure, to allow for modifications in the future.
+ // This field is required and should be set to CURRENT_VERSION above.
+ DWORD dwVersion;
+
+ // Size of the pbClientDataJSON field.
+ DWORD cbClientDataJSON;
+ // UTF-8 encoded JSON serialization of the client data.
+ _Field_size_bytes_(cbClientDataJSON)
+ PBYTE pbClientDataJSON;
+
+ // Hash algorithm ID used to hash the pbClientDataJSON field.
+ LPCWSTR pwszHashAlgId;
+} WEBAUTHN_CLIENT_DATA, *PWEBAUTHN_CLIENT_DATA;
+typedef const WEBAUTHN_CLIENT_DATA *PCWEBAUTHN_CLIENT_DATA;
+
+//+------------------------------------------------------------------------------------------
+// Information about credential parameters.
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_CREDENTIAL_TYPE_PUBLIC_KEY L"public-key"
+
+#define WEBAUTHN_COSE_ALGORITHM_ECDSA_P256_WITH_SHA256 -7
+#define WEBAUTHN_COSE_ALGORITHM_ECDSA_P384_WITH_SHA384 -35
+#define WEBAUTHN_COSE_ALGORITHM_ECDSA_P521_WITH_SHA512 -36
+
+#define WEBAUTHN_COSE_ALGORITHM_RSASSA_PKCS1_V1_5_WITH_SHA256 -257
+#define WEBAUTHN_COSE_ALGORITHM_RSASSA_PKCS1_V1_5_WITH_SHA384 -258
+#define WEBAUTHN_COSE_ALGORITHM_RSASSA_PKCS1_V1_5_WITH_SHA512 -259
+
+#define WEBAUTHN_COSE_ALGORITHM_RSA_PSS_WITH_SHA256 -37
+#define WEBAUTHN_COSE_ALGORITHM_RSA_PSS_WITH_SHA384 -38
+#define WEBAUTHN_COSE_ALGORITHM_RSA_PSS_WITH_SHA512 -39
+
+#define WEBAUTHN_COSE_CREDENTIAL_PARAMETER_CURRENT_VERSION 1
+
+typedef struct _WEBAUTHN_COSE_CREDENTIAL_PARAMETER {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // Well-known credential type specifying a credential to create.
+ LPCWSTR pwszCredentialType;
+
+ // Well-known COSE algorithm specifying the algorithm to use for the credential.
+ LONG lAlg;
+} WEBAUTHN_COSE_CREDENTIAL_PARAMETER, *PWEBAUTHN_COSE_CREDENTIAL_PARAMETER;
+typedef const WEBAUTHN_COSE_CREDENTIAL_PARAMETER *PCWEBAUTHN_COSE_CREDENTIAL_PARAMETER;
+
+typedef struct _WEBAUTHN_COSE_CREDENTIAL_PARAMETERS {
+ DWORD cCredentialParameters;
+ _Field_size_(cCredentialParameters)
+ PWEBAUTHN_COSE_CREDENTIAL_PARAMETER pCredentialParameters;
+} WEBAUTHN_COSE_CREDENTIAL_PARAMETERS, *PWEBAUTHN_COSE_CREDENTIAL_PARAMETERS;
+typedef const WEBAUTHN_COSE_CREDENTIAL_PARAMETERS *PCWEBAUTHN_COSE_CREDENTIAL_PARAMETERS;
+
+//+------------------------------------------------------------------------------------------
+// Information about credential.
+//-------------------------------------------------------------------------------------------
+#define WEBAUTHN_CREDENTIAL_CURRENT_VERSION 1
+
+typedef struct _WEBAUTHN_CREDENTIAL {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // Size of pbID.
+ DWORD cbId;
+ // Unique ID for this particular credential.
+ _Field_size_bytes_(cbId)
+ PBYTE pbId;
+
+ // Well-known credential type specifying what this particular credential is.
+ LPCWSTR pwszCredentialType;
+} WEBAUTHN_CREDENTIAL, *PWEBAUTHN_CREDENTIAL;
+typedef const WEBAUTHN_CREDENTIAL *PCWEBAUTHN_CREDENTIAL;
+
+typedef struct _WEBAUTHN_CREDENTIALS {
+ DWORD cCredentials;
+ _Field_size_(cCredentials)
+ PWEBAUTHN_CREDENTIAL pCredentials;
+} WEBAUTHN_CREDENTIALS, *PWEBAUTHN_CREDENTIALS;
+typedef const WEBAUTHN_CREDENTIALS *PCWEBAUTHN_CREDENTIALS;
+
+//+------------------------------------------------------------------------------------------
+// Information about credential with extra information, such as, dwTransports
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_CTAP_TRANSPORT_USB 0x00000001
+#define WEBAUTHN_CTAP_TRANSPORT_NFC 0x00000002
+#define WEBAUTHN_CTAP_TRANSPORT_BLE 0x00000004
+#define WEBAUTHN_CTAP_TRANSPORT_TEST 0x00000008
+#define WEBAUTHN_CTAP_TRANSPORT_INTERNAL 0x00000010
+#define WEBAUTHN_CTAP_TRANSPORT_FLAGS_MASK 0x0000001F
+
+#define WEBAUTHN_CREDENTIAL_EX_CURRENT_VERSION 1
+
+typedef struct _WEBAUTHN_CREDENTIAL_EX {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // Size of pbID.
+ DWORD cbId;
+ // Unique ID for this particular credential.
+ _Field_size_bytes_(cbId)
+ PBYTE pbId;
+
+ // Well-known credential type specifying what this particular credential is.
+ LPCWSTR pwszCredentialType;
+
+ // Transports. 0 implies no transport restrictions.
+ DWORD dwTransports;
+} WEBAUTHN_CREDENTIAL_EX, *PWEBAUTHN_CREDENTIAL_EX;
+typedef const WEBAUTHN_CREDENTIAL_EX *PCWEBAUTHN_CREDENTIAL_EX;
+
+//+------------------------------------------------------------------------------------------
+// Information about credential list with extra information
+//-------------------------------------------------------------------------------------------
+
+typedef struct _WEBAUTHN_CREDENTIAL_LIST {
+ DWORD cCredentials;
+ _Field_size_(cCredentials)
+ PWEBAUTHN_CREDENTIAL_EX *ppCredentials;
+} WEBAUTHN_CREDENTIAL_LIST, *PWEBAUTHN_CREDENTIAL_LIST;
+typedef const WEBAUTHN_CREDENTIAL_LIST *PCWEBAUTHN_CREDENTIAL_LIST;
+
+//+------------------------------------------------------------------------------------------
+// Credential Information for WebAuthNGetPlatformCredentialList API
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_CREDENTIAL_DETAILS_VERSION_1 1
+#define WEBAUTHN_CREDENTIAL_DETAILS_CURRENT_VERSION WEBAUTHN_CREDENTIAL_DETAILS_VERSION_1
+
+typedef struct _WEBAUTHN_CREDENTIAL_DETAILS {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // Size of pbCredentialID.
+ DWORD cbCredentialID;
+ _Field_size_bytes_(cbCredentialID)
+ PBYTE pbCredentialID;
+
+ // RP Info
+ PWEBAUTHN_RP_ENTITY_INFORMATION pRpInformation;
+
+ // User Info
+ PWEBAUTHN_USER_ENTITY_INFORMATION pUserInformation;
+} WEBAUTHN_CREDENTIAL_DETAILS, *PWEBAUTHN_CREDENTIAL_DETAILS;
+typedef const WEBAUTHN_CREDENTIAL_DETAILS *PCWEBAUTHN_CREDENTIAL_DETAILS;
+
+typedef struct _WEBAUTHN_CREDENTIAL_DETAILS_LIST {
+ DWORD cCredentialDetails;
+ _Field_size_(cCredentialDetails)
+ PWEBAUTHN_CREDENTIAL_DETAILS *ppCredentialDetails;
+} WEBAUTHN_CREDENTIAL_DETAILS_LIST, *PWEBAUTHN_CREDENTIAL_DETAILS_LIST;
+typedef const WEBAUTHN_CREDENTIAL_DETAILS_LIST *PCWEBAUTHN_CREDENTIAL_DETAILS_LIST;
+
+#define WEBAUTHN_GET_CREDENTIALS_OPTIONS_VERSION_1 1
+#define WEBAUTHN_GET_CREDENTIALS_OPTIONS_CURRENT_VERSION WEBAUTHN_GET_CREDENTIALS_OPTIONS_VERSION_1
+
+typedef struct _WEBAUTHN_GET_CREDENTIALS_OPTIONS {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // RPID
+ LPCWSTR pwszRpId;
+
+ // Optional. BrowserInPrivate Mode. Defaulting to FALSE.
+ BOOL bBrowserInPrivateMode;
+} WEBAUTHN_GET_CREDENTIALS_OPTIONS, *PWEBAUTHN_GET_CREDENTIALS_OPTIONS;
+typedef const WEBAUTHN_GET_CREDENTIALS_OPTIONS *PCWEBAUTHN_GET_CREDENTIALS_OPTIONS;
+
+//+------------------------------------------------------------------------------------------
+// PRF values.
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_CTAP_ONE_HMAC_SECRET_LENGTH 32
+
+// SALT values below by default are converted into RAW Hmac-Secret values as per PRF extension.
+// - SHA-256(UTF8Encode("WebAuthn PRF") || 0x00 || Value)
+//
+// Set WEBAUTHN_CTAP_HMAC_SECRET_VALUES_FLAG in dwFlags in WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS,
+// if caller wants to provide RAW Hmac-Secret SALT values directly. In that case,
+// values if provided MUST be of WEBAUTHN_CTAP_ONE_HMAC_SECRET_LENGTH size.
+
+typedef struct _WEBAUTHN_HMAC_SECRET_SALT {
+ // Size of pbFirst.
+ DWORD cbFirst;
+ _Field_size_bytes_(cbFirst)
+ PBYTE pbFirst; // Required
+
+ // Size of pbSecond.
+ DWORD cbSecond;
+ _Field_size_bytes_(cbSecond)
+ PBYTE pbSecond;
+} WEBAUTHN_HMAC_SECRET_SALT, *PWEBAUTHN_HMAC_SECRET_SALT;
+typedef const WEBAUTHN_HMAC_SECRET_SALT *PCWEBAUTHN_HMAC_SECRET_SALT;
+
+typedef struct _WEBAUTHN_CRED_WITH_HMAC_SECRET_SALT {
+ // Size of pbCredID.
+ DWORD cbCredID;
+ _Field_size_bytes_(cbCredID)
+ PBYTE pbCredID; // Required
+
+ // PRF Values for above credential
+ PWEBAUTHN_HMAC_SECRET_SALT pHmacSecretSalt; // Required
+} WEBAUTHN_CRED_WITH_HMAC_SECRET_SALT, *PWEBAUTHN_CRED_WITH_HMAC_SECRET_SALT;
+typedef const WEBAUTHN_CRED_WITH_HMAC_SECRET_SALT *PCWEBAUTHN_CRED_WITH_HMAC_SECRET_SALT;
+
+typedef struct _WEBAUTHN_HMAC_SECRET_SALT_VALUES {
+ PWEBAUTHN_HMAC_SECRET_SALT pGlobalHmacSalt;
+
+ DWORD cCredWithHmacSecretSaltList;
+ _Field_size_(cCredWithHmacSecretSaltList)
+ PWEBAUTHN_CRED_WITH_HMAC_SECRET_SALT pCredWithHmacSecretSaltList;
+} WEBAUTHN_HMAC_SECRET_SALT_VALUES, *PWEBAUTHN_HMAC_SECRET_SALT_VALUES;
+typedef const WEBAUTHN_HMAC_SECRET_SALT_VALUES *PCWEBAUTHN_HMAC_SECRET_SALT_VALUES;
+
+//+------------------------------------------------------------------------------------------
+// Hmac-Secret extension
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_EXTENSIONS_IDENTIFIER_HMAC_SECRET L"hmac-secret"
+// Below type definitions is for WEBAUTHN_EXTENSIONS_IDENTIFIER_HMAC_SECRET
+// MakeCredential Input Type: BOOL.
+// - pvExtension must point to a BOOL with the value TRUE.
+// - cbExtension must contain the sizeof(BOOL).
+// MakeCredential Output Type: BOOL.
+// - pvExtension will point to a BOOL with the value TRUE if credential
+// was successfully created with HMAC_SECRET.
+// - cbExtension will contain the sizeof(BOOL).
+// GetAssertion Input Type: Not Supported
+// GetAssertion Output Type: Not Supported
+
+//+------------------------------------------------------------------------------------------
+// credProtect extension
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_USER_VERIFICATION_ANY 0
+#define WEBAUTHN_USER_VERIFICATION_OPTIONAL 1
+#define WEBAUTHN_USER_VERIFICATION_OPTIONAL_WITH_CREDENTIAL_ID_LIST 2
+#define WEBAUTHN_USER_VERIFICATION_REQUIRED 3
+
+typedef struct _WEBAUTHN_CRED_PROTECT_EXTENSION_IN {
+ // One of the above WEBAUTHN_USER_VERIFICATION_* values
+ DWORD dwCredProtect;
+ // Set the following to TRUE to require authenticator support for the credProtect extension
+ BOOL bRequireCredProtect;
+} WEBAUTHN_CRED_PROTECT_EXTENSION_IN, *PWEBAUTHN_CRED_PROTECT_EXTENSION_IN;
+typedef const WEBAUTHN_CRED_PROTECT_EXTENSION_IN *PCWEBAUTHN_CRED_PROTECT_EXTENSION_IN;
+
+
+#define WEBAUTHN_EXTENSIONS_IDENTIFIER_CRED_PROTECT L"credProtect"
+// Below type definitions is for WEBAUTHN_EXTENSIONS_IDENTIFIER_CRED_PROTECT
+// MakeCredential Input Type: WEBAUTHN_CRED_PROTECT_EXTENSION_IN.
+// - pvExtension must point to a WEBAUTHN_CRED_PROTECT_EXTENSION_IN struct
+// - cbExtension will contain the sizeof(WEBAUTHN_CRED_PROTECT_EXTENSION_IN).
+// MakeCredential Output Type: DWORD.
+// - pvExtension will point to a DWORD with one of the above WEBAUTHN_USER_VERIFICATION_* values
+// if credential was successfully created with CRED_PROTECT.
+// - cbExtension will contain the sizeof(DWORD).
+// GetAssertion Input Type: Not Supported
+// GetAssertion Output Type: Not Supported
+
+//+------------------------------------------------------------------------------------------
+// credBlob extension
+//-------------------------------------------------------------------------------------------
+
+typedef struct _WEBAUTHN_CRED_BLOB_EXTENSION {
+ // Size of pbCredBlob.
+ DWORD cbCredBlob;
+ _Field_size_bytes_(cbCredBlob)
+ PBYTE pbCredBlob;
+} WEBAUTHN_CRED_BLOB_EXTENSION, *PWEBAUTHN_CRED_BLOB_EXTENSION;
+typedef const WEBAUTHN_CRED_BLOB_EXTENSION *PCWEBAUTHN_CRED_BLOB_EXTENSION;
+
+
+#define WEBAUTHN_EXTENSIONS_IDENTIFIER_CRED_BLOB L"credBlob"
+// Below type definitions is for WEBAUTHN_EXTENSIONS_IDENTIFIER_CRED_BLOB
+// MakeCredential Input Type: WEBAUTHN_CRED_BLOB_EXTENSION.
+// - pvExtension must point to a WEBAUTHN_CRED_BLOB_EXTENSION struct
+// - cbExtension must contain the sizeof(WEBAUTHN_CRED_BLOB_EXTENSION).
+// MakeCredential Output Type: BOOL.
+// - pvExtension will point to a BOOL with the value TRUE if credBlob was successfully created
+// - cbExtension will contain the sizeof(BOOL).
+// GetAssertion Input Type: BOOL.
+// - pvExtension must point to a BOOL with the value TRUE to request the credBlob.
+// - cbExtension must contain the sizeof(BOOL).
+// GetAssertion Output Type: WEBAUTHN_CRED_BLOB_EXTENSION.
+// - pvExtension will point to a WEBAUTHN_CRED_BLOB_EXTENSION struct if the authenticator
+// returns the credBlob in the signed extensions
+// - cbExtension will contain the sizeof(WEBAUTHN_CRED_BLOB_EXTENSION).
+
+//+------------------------------------------------------------------------------------------
+// minPinLength extension
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_EXTENSIONS_IDENTIFIER_MIN_PIN_LENGTH L"minPinLength"
+// Below type definitions is for WEBAUTHN_EXTENSIONS_IDENTIFIER_MIN_PIN_LENGTH
+// MakeCredential Input Type: BOOL.
+// - pvExtension must point to a BOOL with the value TRUE to request the minPinLength.
+// - cbExtension must contain the sizeof(BOOL).
+// MakeCredential Output Type: DWORD.
+// - pvExtension will point to a DWORD with the minimum pin length if returned by the authenticator
+// - cbExtension will contain the sizeof(DWORD).
+// GetAssertion Input Type: Not Supported
+// GetAssertion Output Type: Not Supported
+
+//+------------------------------------------------------------------------------------------
+// Information about Extensions.
+//-------------------------------------------------------------------------------------------
+typedef struct _WEBAUTHN_EXTENSION {
+ LPCWSTR pwszExtensionIdentifier;
+ DWORD cbExtension;
+ PVOID pvExtension;
+} WEBAUTHN_EXTENSION, *PWEBAUTHN_EXTENSION;
+typedef const WEBAUTHN_EXTENSION *PCWEBAUTHN_EXTENSION;
+
+typedef struct _WEBAUTHN_EXTENSIONS {
+ DWORD cExtensions;
+ _Field_size_(cExtensions)
+ PWEBAUTHN_EXTENSION pExtensions;
+} WEBAUTHN_EXTENSIONS, *PWEBAUTHN_EXTENSIONS;
+typedef const WEBAUTHN_EXTENSIONS *PCWEBAUTHN_EXTENSIONS;
+
+//+------------------------------------------------------------------------------------------
+// Options.
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_AUTHENTICATOR_ATTACHMENT_ANY 0
+#define WEBAUTHN_AUTHENTICATOR_ATTACHMENT_PLATFORM 1
+#define WEBAUTHN_AUTHENTICATOR_ATTACHMENT_CROSS_PLATFORM 2
+#define WEBAUTHN_AUTHENTICATOR_ATTACHMENT_CROSS_PLATFORM_U2F_V2 3
+
+#define WEBAUTHN_USER_VERIFICATION_REQUIREMENT_ANY 0
+#define WEBAUTHN_USER_VERIFICATION_REQUIREMENT_REQUIRED 1
+#define WEBAUTHN_USER_VERIFICATION_REQUIREMENT_PREFERRED 2
+#define WEBAUTHN_USER_VERIFICATION_REQUIREMENT_DISCOURAGED 3
+
+#define WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_ANY 0
+#define WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_NONE 1
+#define WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_INDIRECT 2
+#define WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_DIRECT 3
+
+#define WEBAUTHN_ENTERPRISE_ATTESTATION_NONE 0
+#define WEBAUTHN_ENTERPRISE_ATTESTATION_VENDOR_FACILITATED 1
+#define WEBAUTHN_ENTERPRISE_ATTESTATION_PLATFORM_MANAGED 2
+
+#define WEBAUTHN_LARGE_BLOB_SUPPORT_NONE 0
+#define WEBAUTHN_LARGE_BLOB_SUPPORT_REQUIRED 1
+#define WEBAUTHN_LARGE_BLOB_SUPPORT_PREFERRED 2
+
+#define WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_1 1
+#define WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_2 2
+#define WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_3 3
+#define WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_4 4
+#define WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_5 5
+#define WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_CURRENT_VERSION WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_5
+
+typedef struct _WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // Time that the operation is expected to complete within.
+ // This is used as guidance, and can be overridden by the platform.
+ DWORD dwTimeoutMilliseconds;
+
+ // Credentials used for exclusion.
+ WEBAUTHN_CREDENTIALS CredentialList;
+
+ // Optional extensions to parse when performing the operation.
+ WEBAUTHN_EXTENSIONS Extensions;
+
+ // Optional. Platform vs Cross-Platform Authenticators.
+ DWORD dwAuthenticatorAttachment;
+
+ // Optional. Require key to be resident or not. Defaulting to FALSE.
+ BOOL bRequireResidentKey;
+
+ // User Verification Requirement.
+ DWORD dwUserVerificationRequirement;
+
+ // Attestation Conveyance Preference.
+ DWORD dwAttestationConveyancePreference;
+
+ // Reserved for future Use
+ DWORD dwFlags;
+
+ //
+ // The following fields have been added in WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_2
+ //
+
+ // Cancellation Id - Optional - See WebAuthNGetCancellationId
+ GUID *pCancellationId;
+
+ //
+ // The following fields have been added in WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_3
+ //
+
+ // Exclude Credential List. If present, "CredentialList" will be ignored.
+ PWEBAUTHN_CREDENTIAL_LIST pExcludeCredentialList;
+
+ //
+ // The following fields have been added in WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_4
+ //
+
+ // Enterprise Attestation
+ DWORD dwEnterpriseAttestation;
+
+ // Large Blob Support: none, required or preferred
+ //
+ // NTE_INVALID_PARAMETER when large blob required or preferred and
+ // bRequireResidentKey isn't set to TRUE
+ DWORD dwLargeBlobSupport;
+
+ // Optional. Prefer key to be resident. Defaulting to FALSE. When TRUE,
+ // overrides the above bRequireResidentKey.
+ BOOL bPreferResidentKey;
+
+ //
+ // The following fields have been added in WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_VERSION_5
+ //
+
+ // Optional. BrowserInPrivate Mode. Defaulting to FALSE.
+ BOOL bBrowserInPrivateMode;
+
+} WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS, *PWEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS;
+typedef const WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS *PCWEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS;
+
+#define WEBAUTHN_CRED_LARGE_BLOB_OPERATION_NONE 0
+#define WEBAUTHN_CRED_LARGE_BLOB_OPERATION_GET 1
+#define WEBAUTHN_CRED_LARGE_BLOB_OPERATION_SET 2
+#define WEBAUTHN_CRED_LARGE_BLOB_OPERATION_DELETE 3
+
+#define WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_1 1
+#define WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_2 2
+#define WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_3 3
+#define WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_4 4
+#define WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_5 5
+#define WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_6 6
+#define WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_CURRENT_VERSION WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_6
+
+/*
+ Information about flags.
+*/
+
+#define WEBAUTHN_AUTHENTICATOR_HMAC_SECRET_VALUES_FLAG 0x00100000
+
+typedef struct _WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // Time that the operation is expected to complete within.
+ // This is used as guidance, and can be overridden by the platform.
+ DWORD dwTimeoutMilliseconds;
+
+ // Allowed Credentials List.
+ WEBAUTHN_CREDENTIALS CredentialList;
+
+ // Optional extensions to parse when performing the operation.
+ WEBAUTHN_EXTENSIONS Extensions;
+
+ // Optional. Platform vs Cross-Platform Authenticators.
+ DWORD dwAuthenticatorAttachment;
+
+ // User Verification Requirement.
+ DWORD dwUserVerificationRequirement;
+
+ // Flags
+ DWORD dwFlags;
+
+ //
+ // The following fields have been added in WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_2
+ //
+
+ // Optional identifier for the U2F AppId. Converted to UTF8 before being hashed. Not lower cased.
+ PCWSTR pwszU2fAppId;
+
+ // If the following is non-NULL, then, set to TRUE if the above pwszU2fAppid was used instead of
+ // PCWSTR pwszRpId;
+ BOOL *pbU2fAppId;
+
+ //
+ // The following fields have been added in WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_3
+ //
+
+ // Cancellation Id - Optional - See WebAuthNGetCancellationId
+ GUID *pCancellationId;
+
+ //
+ // The following fields have been added in WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_4
+ //
+
+ // Allow Credential List. If present, "CredentialList" will be ignored.
+ PWEBAUTHN_CREDENTIAL_LIST pAllowCredentialList;
+
+ //
+ // The following fields have been added in WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_5
+ //
+
+ DWORD dwCredLargeBlobOperation;
+
+ // Size of pbCredLargeBlob
+ DWORD cbCredLargeBlob;
+ _Field_size_bytes_(cbCredLargeBlob)
+ PBYTE pbCredLargeBlob;
+
+ //
+ // The following fields have been added in WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_VERSION_6
+ //
+
+ // PRF values which will be converted into HMAC-SECRET values according to WebAuthn Spec.
+ PWEBAUTHN_HMAC_SECRET_SALT_VALUES pHmacSecretSaltValues;
+
+ // Optional. BrowserInPrivate Mode. Defaulting to FALSE.
+ BOOL bBrowserInPrivateMode;
+
+} WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS, *PWEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS;
+typedef const WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS *PCWEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS;
+
+
+//+------------------------------------------------------------------------------------------
+// Attestation Info.
+//
+//-------------------------------------------------------------------------------------------
+#define WEBAUTHN_ATTESTATION_DECODE_NONE 0
+#define WEBAUTHN_ATTESTATION_DECODE_COMMON 1
+// WEBAUTHN_ATTESTATION_DECODE_COMMON supports format types
+// L"packed"
+// L"fido-u2f"
+
+#define WEBAUTHN_ATTESTATION_VER_TPM_2_0 L"2.0"
+
+typedef struct _WEBAUTHN_X5C {
+ // Length of X.509 encoded certificate
+ DWORD cbData;
+ // X.509 encoded certificate bytes
+ _Field_size_bytes_(cbData)
+ PBYTE pbData;
+} WEBAUTHN_X5C, *PWEBAUTHN_X5C;
+
+// Supports either Self or Full Basic Attestation
+
+// Note, new fields will be added to the following data structure to
+// support additional attestation format types, such as, TPM.
+// When fields are added, the dwVersion will be incremented.
+//
+// Therefore, your code must make the following check:
+// "if (dwVersion >= WEBAUTHN_COMMON_ATTESTATION_CURRENT_VERSION)"
+
+#define WEBAUTHN_COMMON_ATTESTATION_CURRENT_VERSION 1
+
+typedef struct _WEBAUTHN_COMMON_ATTESTATION {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // Hash and Padding Algorithm
+ //
+ // The following won't be set for "fido-u2f" which assumes "ES256".
+ PCWSTR pwszAlg;
+ LONG lAlg; // COSE algorithm
+
+ // Signature that was generated for this attestation.
+ DWORD cbSignature;
+ _Field_size_bytes_(cbSignature)
+ PBYTE pbSignature;
+
+ // Following is set for Full Basic Attestation. If not, set then, this is Self Attestation.
+ // Array of X.509 DER encoded certificates. The first certificate is the signer, leaf certificate.
+ DWORD cX5c;
+ _Field_size_(cX5c)
+ PWEBAUTHN_X5C pX5c;
+
+ // Following are also set for tpm
+ PCWSTR pwszVer; // L"2.0"
+ DWORD cbCertInfo;
+ _Field_size_bytes_(cbCertInfo)
+ PBYTE pbCertInfo;
+ DWORD cbPubArea;
+ _Field_size_bytes_(cbPubArea)
+ PBYTE pbPubArea;
+} WEBAUTHN_COMMON_ATTESTATION, *PWEBAUTHN_COMMON_ATTESTATION;
+typedef const WEBAUTHN_COMMON_ATTESTATION *PCWEBAUTHN_COMMON_ATTESTATION;
+
+#define WEBAUTHN_ATTESTATION_TYPE_PACKED L"packed"
+#define WEBAUTHN_ATTESTATION_TYPE_U2F L"fido-u2f"
+#define WEBAUTHN_ATTESTATION_TYPE_TPM L"tpm"
+#define WEBAUTHN_ATTESTATION_TYPE_NONE L"none"
+
+#define WEBAUTHN_CREDENTIAL_ATTESTATION_VERSION_1 1
+#define WEBAUTHN_CREDENTIAL_ATTESTATION_VERSION_2 2
+#define WEBAUTHN_CREDENTIAL_ATTESTATION_VERSION_3 3
+#define WEBAUTHN_CREDENTIAL_ATTESTATION_VERSION_4 4
+#define WEBAUTHN_CREDENTIAL_ATTESTATION_CURRENT_VERSION WEBAUTHN_CREDENTIAL_ATTESTATION_VERSION_4
+
+typedef struct _WEBAUTHN_CREDENTIAL_ATTESTATION {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // Attestation format type
+ PCWSTR pwszFormatType;
+
+ // Size of cbAuthenticatorData.
+ DWORD cbAuthenticatorData;
+ // Authenticator data that was created for this credential.
+ _Field_size_bytes_(cbAuthenticatorData)
+ PBYTE pbAuthenticatorData;
+
+ // Size of CBOR encoded attestation information
+ //0 => encoded as CBOR null value.
+ DWORD cbAttestation;
+ //Encoded CBOR attestation information
+ _Field_size_bytes_(cbAttestation)
+ PBYTE pbAttestation;
+
+ DWORD dwAttestationDecodeType;
+ // Following depends on the dwAttestationDecodeType
+ // WEBAUTHN_ATTESTATION_DECODE_NONE
+ // NULL - not able to decode the CBOR attestation information
+ // WEBAUTHN_ATTESTATION_DECODE_COMMON
+ // PWEBAUTHN_COMMON_ATTESTATION;
+ PVOID pvAttestationDecode;
+
+ // The CBOR encoded Attestation Object to be returned to the RP.
+ DWORD cbAttestationObject;
+ _Field_size_bytes_(cbAttestationObject)
+ PBYTE pbAttestationObject;
+
+ // The CredentialId bytes extracted from the Authenticator Data.
+ // Used by Edge to return to the RP.
+ DWORD cbCredentialId;
+ _Field_size_bytes_(cbCredentialId)
+ PBYTE pbCredentialId;
+
+ //
+ // Following fields have been added in WEBAUTHN_CREDENTIAL_ATTESTATION_VERSION_2
+ //
+
+ WEBAUTHN_EXTENSIONS Extensions;
+
+ //
+ // Following fields have been added in WEBAUTHN_CREDENTIAL_ATTESTATION_VERSION_3
+ //
+
+ // One of the WEBAUTHN_CTAP_TRANSPORT_* bits will be set corresponding to
+ // the transport that was used.
+ DWORD dwUsedTransport;
+
+ //
+ // Following fields have been added in WEBAUTHN_CREDENTIAL_ATTESTATION_VERSION_4
+ //
+
+ BOOL bEpAtt;
+ BOOL bLargeBlobSupported;
+ BOOL bResidentKey;
+
+} WEBAUTHN_CREDENTIAL_ATTESTATION, *PWEBAUTHN_CREDENTIAL_ATTESTATION;
+typedef const WEBAUTHN_CREDENTIAL_ATTESTATION *PCWEBAUTHN_CREDENTIAL_ATTESTATION;
+
+
+//+------------------------------------------------------------------------------------------
+// authenticatorGetAssertion output.
+//-------------------------------------------------------------------------------------------
+
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_NONE 0
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_SUCCESS 1
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_NOT_SUPPORTED 2
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_INVALID_DATA 3
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_INVALID_PARAMETER 4
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_NOT_FOUND 5
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_MULTIPLE_CREDENTIALS 6
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_LACK_OF_SPACE 7
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_PLATFORM_ERROR 8
+#define WEBAUTHN_CRED_LARGE_BLOB_STATUS_AUTHENTICATOR_ERROR 9
+
+#define WEBAUTHN_ASSERTION_VERSION_1 1
+#define WEBAUTHN_ASSERTION_VERSION_2 2
+#define WEBAUTHN_ASSERTION_VERSION_3 3
+#define WEBAUTHN_ASSERTION_CURRENT_VERSION WEBAUTHN_ASSERTION_VERSION_3
+
+typedef struct _WEBAUTHN_ASSERTION {
+ // Version of this structure, to allow for modifications in the future.
+ DWORD dwVersion;
+
+ // Size of cbAuthenticatorData.
+ DWORD cbAuthenticatorData;
+ // Authenticator data that was created for this assertion.
+ _Field_size_bytes_(cbAuthenticatorData)
+ PBYTE pbAuthenticatorData;
+
+ // Size of pbSignature.
+ DWORD cbSignature;
+ // Signature that was generated for this assertion.
+ _Field_size_bytes_(cbSignature)
+ PBYTE pbSignature;
+
+ // Credential that was used for this assertion.
+ WEBAUTHN_CREDENTIAL Credential;
+
+ // Size of User Id
+ DWORD cbUserId;
+ // UserId
+ _Field_size_bytes_(cbUserId)
+ PBYTE pbUserId;
+
+ //
+ // Following fields have been added in WEBAUTHN_ASSERTION_VERSION_2
+ //
+
+ WEBAUTHN_EXTENSIONS Extensions;
+
+ // Size of pbCredLargeBlob
+ DWORD cbCredLargeBlob;
+ _Field_size_bytes_(cbCredLargeBlob)
+ PBYTE pbCredLargeBlob;
+
+ DWORD dwCredLargeBlobStatus;
+
+ //
+ // Following fields have been added in WEBAUTHN_ASSERTION_VERSION_3
+ //
+
+ PWEBAUTHN_HMAC_SECRET_SALT pHmacSecret;
+
+} WEBAUTHN_ASSERTION, *PWEBAUTHN_ASSERTION;
+typedef const WEBAUTHN_ASSERTION *PCWEBAUTHN_ASSERTION;
+
+//+------------------------------------------------------------------------------------------
+// APIs.
+//-------------------------------------------------------------------------------------------
+
+DWORD
+WINAPI
+WebAuthNGetApiVersionNumber();
+
+HRESULT
+WINAPI
+WebAuthNIsUserVerifyingPlatformAuthenticatorAvailable(
+ _Out_ BOOL *pbIsUserVerifyingPlatformAuthenticatorAvailable);
+
+
+HRESULT
+WINAPI
+WebAuthNAuthenticatorMakeCredential(
+ _In_ HWND hWnd,
+ _In_ PCWEBAUTHN_RP_ENTITY_INFORMATION pRpInformation,
+ _In_ PCWEBAUTHN_USER_ENTITY_INFORMATION pUserInformation,
+ _In_ PCWEBAUTHN_COSE_CREDENTIAL_PARAMETERS pPubKeyCredParams,
+ _In_ PCWEBAUTHN_CLIENT_DATA pWebAuthNClientData,
+ _In_opt_ PCWEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS pWebAuthNMakeCredentialOptions,
+ _Outptr_result_maybenull_ PWEBAUTHN_CREDENTIAL_ATTESTATION *ppWebAuthNCredentialAttestation);
+
+
+HRESULT
+WINAPI
+WebAuthNAuthenticatorGetAssertion(
+ _In_ HWND hWnd,
+ _In_ LPCWSTR pwszRpId,
+ _In_ PCWEBAUTHN_CLIENT_DATA pWebAuthNClientData,
+ _In_opt_ PCWEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS pWebAuthNGetAssertionOptions,
+ _Outptr_result_maybenull_ PWEBAUTHN_ASSERTION *ppWebAuthNAssertion);
+
+void
+WINAPI
+WebAuthNFreeCredentialAttestation(
+ _In_opt_ PWEBAUTHN_CREDENTIAL_ATTESTATION pWebAuthNCredentialAttestation);
+
+void
+WINAPI
+WebAuthNFreeAssertion(
+ _In_ PWEBAUTHN_ASSERTION pWebAuthNAssertion);
+
+HRESULT
+WINAPI
+WebAuthNGetCancellationId(
+ _Out_ GUID* pCancellationId);
+
+HRESULT
+WINAPI
+WebAuthNCancelCurrentOperation(
+ _In_ const GUID* pCancellationId);
+
+HRESULT
+WINAPI
+WebAuthNGetPlatformCredentialList(
+ _In_ PCWEBAUTHN_GET_CREDENTIALS_OPTIONS pGetCredentialsOptions,
+ _Outptr_result_maybenull_ PWEBAUTHN_CREDENTIAL_DETAILS_LIST *ppCredentialDetailsList);
+
+void
+WINAPI
+WebAuthNFreePlatformCredentialList(
+ _In_ PWEBAUTHN_CREDENTIAL_DETAILS_LIST pCredentialDetailsList);
+
+//
+// Returns the following Error Names:
+// L"Success" - S_OK
+// L"InvalidStateError" - NTE_EXISTS
+// L"ConstraintError" - HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED),
+// NTE_NOT_SUPPORTED,
+// NTE_TOKEN_KEYSET_STORAGE_FULL
+// L"NotSupportedError" - NTE_INVALID_PARAMETER
+// L"NotAllowedError" - NTE_DEVICE_NOT_FOUND,
+// NTE_NOT_FOUND,
+// HRESULT_FROM_WIN32(ERROR_CANCELLED),
+// NTE_USER_CANCELLED,
+// HRESULT_FROM_WIN32(ERROR_TIMEOUT)
+// L"UnknownError" - All other hr values
+//
+PCWSTR
+WINAPI
+WebAuthNGetErrorName(
+ _In_ HRESULT hr);
+
+HRESULT
+WINAPI
+WebAuthNGetW3CExceptionDOMError(
+ _In_ HRESULT hr);
+
+
+#ifdef __cplusplus
+} // Balance extern "C" above
+#endif
+
+#endif // WINAPI_FAMILY_PARTITION
+#ifdef _MSC_VER
+#pragma endregion
+#endif
+
+#endif // __WEBAUTHN_H_