/*
 * Copyright 2005, 2006 Kai Blin
 * Copyright 2016 Jacek Caban for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <assert.h>
#include <stdarg.h>
#include <stdio.h>

#include "windef.h"
#include "winbase.h"
#include "rpc.h"
#include "sspi.h"

#include "secur32_priv.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(secur32);

#define KERBEROS_MAX_BUF 12000

/***********************************************************************
 *              QueryCredentialsAttributesA
 */
static SECURITY_STATUS SEC_ENTRY kerberos_QueryCredentialsAttributesA(CredHandle *phCredential, ULONG ulAttribute, void *pBuffer)
{
    FIXME("(%p %d %p)\n", phCredential, ulAttribute, pBuffer);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              QueryCredentialsAttributesW
 */
static SECURITY_STATUS SEC_ENTRY kerberos_QueryCredentialsAttributesW(CredHandle *phCredential, ULONG ulAttribute, void *pBuffer)
{
    FIXME("(%p, %d, %p)\n", phCredential, ulAttribute, pBuffer);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              AcquireCredentialsHandleW
 */
static SECURITY_STATUS SEC_ENTRY kerberos_AcquireCredentialsHandleW(SEC_WCHAR *pszPrincipal, SEC_WCHAR *pszPackage, ULONG fCredentialUse,
        LUID *pLogonID, void *pAuthData, SEC_GET_KEY_FN pGetKeyFn, void *pGetKeyArgument, CredHandle *phCredential, TimeStamp *ptsExpiry)
{
    FIXME("(%s %s 0x%08x %p %p %p %p %p %p)\n", debugstr_w(pszPrincipal), debugstr_w(pszPackage), fCredentialUse,
          pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
    return SEC_E_NO_CREDENTIALS;
}

/***********************************************************************
 *              AcquireCredentialsHandleA
 */
static SECURITY_STATUS SEC_ENTRY kerberos_AcquireCredentialsHandleA(SEC_CHAR *pszPrincipal, SEC_CHAR *pszPackage, ULONG fCredentialUse,
        LUID *pLogonID, void *pAuthData, SEC_GET_KEY_FN pGetKeyFn, void *pGetKeyArgument, CredHandle *phCredential, TimeStamp *ptsExpiry)
{
    FIXME("(%s %s 0x%08x %p %p %p %p %p %p)\n", debugstr_a(pszPrincipal), debugstr_a(pszPackage), fCredentialUse,
          pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              InitializeSecurityContextW
 */
static SECURITY_STATUS SEC_ENTRY kerberos_InitializeSecurityContextW(CredHandle *phCredential, CtxtHandle *phContext, SEC_WCHAR *pszTargetName,
        ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep, SecBufferDesc *pInput, ULONG Reserved2, CtxtHandle *phNewContext,
        SecBufferDesc *pOutput, ULONG *pfContextAttr, TimeStamp *ptsExpiry)
{
    FIXME("(%p %p %s 0x%08x %d %d %p %d %p %p %p %p)\n", phCredential, phContext, debugstr_w(pszTargetName),
          fContextReq, Reserved1, TargetDataRep, pInput, Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              InitializeSecurityContextA
 */
static SECURITY_STATUS SEC_ENTRY kerberos_InitializeSecurityContextA(CredHandle *phCredential, CtxtHandle *phContext, SEC_CHAR *pszTargetName,
        ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep, SecBufferDesc *pInput, ULONG Reserved2, CtxtHandle *phNewContext,
        SecBufferDesc *pOutput, ULONG *pfContextAttr, TimeStamp *ptsExpiry)
{
    FIXME("%p %p %s %d %d %d %p %d %p %p %p %p\n", phCredential, phContext, debugstr_a(pszTargetName), fContextReq,
          Reserved1, TargetDataRep, pInput, Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              AcceptSecurityContext
 */
static SECURITY_STATUS SEC_ENTRY kerberos_AcceptSecurityContext(CredHandle *phCredential, CtxtHandle *phContext, SecBufferDesc *pInput,
        ULONG fContextReq, ULONG TargetDataRep, CtxtHandle *phNewContext, SecBufferDesc *pOutput, ULONG *pfContextAttr, TimeStamp *ptsExpiry)
{
    FIXME("(%p %p %p %d %d %p %p %p %p)\n", phCredential, phContext, pInput, fContextReq, TargetDataRep, phNewContext, pOutput,
          pfContextAttr, ptsExpiry);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              CompleteAuthToken
 */
static SECURITY_STATUS SEC_ENTRY kerberos_CompleteAuthToken(CtxtHandle *phContext, SecBufferDesc *pToken)
{
    FIXME("(%p %p)\n", phContext, pToken);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              DeleteSecurityContext
 */
static SECURITY_STATUS SEC_ENTRY kerberos_DeleteSecurityContext(CtxtHandle *phContext)
{
    FIXME("(%p)\n", phContext);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              QueryContextAttributesW
 */
static SECURITY_STATUS SEC_ENTRY kerberos_QueryContextAttributesW(CtxtHandle *phContext, ULONG ulAttribute, void *pBuffer)
{
    FIXME("(%p %d %p)\n", phContext, ulAttribute, pBuffer);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              QueryContextAttributesA
 */
static SECURITY_STATUS SEC_ENTRY kerberos_QueryContextAttributesA(CtxtHandle *phContext, ULONG ulAttribute, void *pBuffer)
{
    FIXME("(%p %d %p)\n", phContext, ulAttribute, pBuffer);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              ImpersonateSecurityContext
 */
static SECURITY_STATUS SEC_ENTRY kerberos_ImpersonateSecurityContext(CtxtHandle *phContext)
{
    FIXME("(%p)\n", phContext);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              RevertSecurityContext
 */
static SECURITY_STATUS SEC_ENTRY kerberos_RevertSecurityContext(CtxtHandle *phContext)
{
    FIXME("(%p)\n", phContext);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              MakeSignature
 */
static SECURITY_STATUS SEC_ENTRY kerberos_MakeSignature(CtxtHandle *phContext, ULONG fQOP, SecBufferDesc *pMessage, ULONG MessageSeqNo)
{
    FIXME("(%p %d %p %d)\n", phContext, fQOP, pMessage, MessageSeqNo);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *              VerifySignature
 */
static SECURITY_STATUS SEC_ENTRY kerberos_VerifySignature(CtxtHandle *phContext, SecBufferDesc *pMessage, ULONG MessageSeqNo, PULONG pfQOP)
{
    FIXME("(%p %p %d %p)\n", phContext, pMessage, MessageSeqNo, pfQOP);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *             FreeCredentialsHandle
 */
static SECURITY_STATUS SEC_ENTRY kerberos_FreeCredentialsHandle(PCredHandle phCredential)
{
    FIXME("(%p)\n", phCredential);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *             EncryptMessage
 */
static SECURITY_STATUS SEC_ENTRY kerberos_EncryptMessage(CtxtHandle *phContext, ULONG fQOP, SecBufferDesc *pMessage, ULONG MessageSeqNo)
{
    FIXME("(%p %d %p %d)\n", phContext, fQOP, pMessage, MessageSeqNo);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

/***********************************************************************
 *             DecryptMessage
 */
static SECURITY_STATUS SEC_ENTRY kerberos_DecryptMessage(CtxtHandle *phContext, SecBufferDesc *pMessage, ULONG MessageSeqNo, PULONG pfQOP)
{
    FIXME("(%p %p %d %p)\n", phContext, pMessage, MessageSeqNo, pfQOP);
    return SEC_E_UNSUPPORTED_FUNCTION;
}

static const SecurityFunctionTableA kerberosTableA = {
    1,
    NULL,   /* EnumerateSecurityPackagesA */
    kerberos_QueryCredentialsAttributesA,   /* QueryCredentialsAttributesA */
    kerberos_AcquireCredentialsHandleA,     /* AcquireCredentialsHandleA */
    kerberos_FreeCredentialsHandle,         /* FreeCredentialsHandle */
    NULL,   /* Reserved2 */
    kerberos_InitializeSecurityContextA,    /* InitializeSecurityContextA */
    kerberos_AcceptSecurityContext,         /* AcceptSecurityContext */
    kerberos_CompleteAuthToken,             /* CompleteAuthToken */
    kerberos_DeleteSecurityContext,         /* DeleteSecurityContext */
    NULL,  /* ApplyControlToken */
    kerberos_QueryContextAttributesA,       /* QueryContextAttributesA */
    kerberos_ImpersonateSecurityContext,    /* ImpersonateSecurityContext */
    kerberos_RevertSecurityContext,         /* RevertSecurityContext */
    kerberos_MakeSignature,                 /* MakeSignature */
    kerberos_VerifySignature,               /* VerifySignature */
    FreeContextBuffer,                      /* FreeContextBuffer */
    NULL,   /* QuerySecurityPackageInfoA */
    NULL,   /* Reserved3 */
    NULL,   /* Reserved4 */
    NULL,   /* ExportSecurityContext */
    NULL,   /* ImportSecurityContextA */
    NULL,   /* AddCredentialsA */
    NULL,   /* Reserved8 */
    NULL,   /* QuerySecurityContextToken */
    kerberos_EncryptMessage,                /* EncryptMessage */
    kerberos_DecryptMessage,                /* DecryptMessage */
    NULL,   /* SetContextAttributesA */
};

static const SecurityFunctionTableW kerberosTableW = {
    1,
    NULL,   /* EnumerateSecurityPackagesW */
    kerberos_QueryCredentialsAttributesW,   /* QueryCredentialsAttributesW */
    kerberos_AcquireCredentialsHandleW,     /* AcquireCredentialsHandleW */
    kerberos_FreeCredentialsHandle,         /* FreeCredentialsHandle */
    NULL,   /* Reserved2 */
    kerberos_InitializeSecurityContextW,    /* InitializeSecurityContextW */
    kerberos_AcceptSecurityContext,         /* AcceptSecurityContext */
    kerberos_CompleteAuthToken,             /* CompleteAuthToken */
    kerberos_DeleteSecurityContext,         /* DeleteSecurityContext */
    NULL,  /* ApplyControlToken */
    kerberos_QueryContextAttributesW,       /* QueryContextAttributesW */
    kerberos_ImpersonateSecurityContext,    /* ImpersonateSecurityContext */
    kerberos_RevertSecurityContext,         /* RevertSecurityContext */
    kerberos_MakeSignature,                 /* MakeSignature */
    kerberos_VerifySignature,               /* VerifySignature */
    FreeContextBuffer,                      /* FreeContextBuffer */
    NULL,   /* QuerySecurityPackageInfoW */
    NULL,   /* Reserved3 */
    NULL,   /* Reserved4 */
    NULL,   /* ExportSecurityContext */
    NULL,   /* ImportSecurityContextW */
    NULL,   /* AddCredentialsW */
    NULL,   /* Reserved8 */
    NULL,   /* QuerySecurityContextToken */
    kerberos_EncryptMessage,                /* EncryptMessage */
    kerberos_DecryptMessage,                /* DecryptMessage */
    NULL,   /* SetContextAttributesW */
};

#define KERBEROS_COMMENT \
    {'M','i','c','r','o','s','o','f','t',' ','K','e','r','b','e','r','o','s',' ','V','1','.','0',0}
static CHAR kerberos_comment_A[] = KERBEROS_COMMENT;
static WCHAR kerberos_comment_W[] = KERBEROS_COMMENT;

#define KERBEROS_NAME {'K','e','r','b','e','r','o','s',0}
static char kerberos_name_A[] = KERBEROS_NAME;
static WCHAR kerberos_name_W[] = KERBEROS_NAME;

#define CAPS \
    ( SECPKG_FLAG_INTEGRITY \
    | SECPKG_FLAG_PRIVACY \
    | SECPKG_FLAG_TOKEN_ONLY \
    | SECPKG_FLAG_DATAGRAM \
    | SECPKG_FLAG_CONNECTION \
    | SECPKG_FLAG_MULTI_REQUIRED \
    | SECPKG_FLAG_EXTENDED_ERROR \
    | SECPKG_FLAG_IMPERSONATION \
    | SECPKG_FLAG_ACCEPT_WIN32_NAME \
    | SECPKG_FLAG_NEGOTIABLE \
    | SECPKG_FLAG_GSS_COMPATIBLE \
    | SECPKG_FLAG_LOGON \
    | SECPKG_FLAG_MUTUAL_AUTH \
    | SECPKG_FLAG_DELEGATION \
    | SECPKG_FLAG_READONLY_WITH_CHECKSUM \
    | SECPKG_FLAG_RESTRICTED_TOKENS \
    | SECPKG_FLAG_APPCONTAINER_CHECKS)

static const SecPkgInfoW infoW = {
    CAPS,
    1,
    RPC_C_AUTHN_GSS_KERBEROS,
    KERBEROS_MAX_BUF,
    kerberos_name_W,
    kerberos_comment_W
};

static const SecPkgInfoA infoA = {
    CAPS,
    1,
    RPC_C_AUTHN_GSS_KERBEROS,
    KERBEROS_MAX_BUF,
    kerberos_name_A,
    kerberos_comment_A
};

void SECUR32_initKerberosSP(void)
{
    SecureProvider *provider = SECUR32_addProvider(&kerberosTableA, &kerberosTableW, NULL);
    SECUR32_addPackages(provider, 1, &infoA, &infoW);
}