/*
 * Internet Security and Zone Manager
 *
 * Copyright (c) 2004 Huw D M Davies
 * Copyright 2004 Jacek Caban
 * Copyright 2009 Detlef Riekenberg
 *
 * 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 <stdio.h>

#include "urlmon_main.h"
#include "winreg.h"
#include "wininet.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(urlmon);

static const WCHAR currentlevelW[] = {'C','u','r','r','e','n','t','L','e','v','e','l',0};
static const WCHAR descriptionW[] = {'D','e','s','c','r','i','p','t','i','o','n',0};
static const WCHAR displaynameW[] = {'D','i','s','p','l','a','y','N','a','m','e',0};
static const WCHAR fileW[] = {'f','i','l','e',0};
static const WCHAR flagsW[] = {'F','l','a','g','s',0};
static const WCHAR iconW[] = {'I','c','o','n',0};
static const WCHAR minlevelW[] = {'M','i','n','L','e','v','e','l',0};
static const WCHAR recommendedlevelW[] = {'R','e','c','o','m','m','e','n','d','e','d',
                                          'L','e','v','e','l',0};
static const WCHAR wszZonesKey[] = {'S','o','f','t','w','a','r','e','\\',
                                    'M','i','c','r','o','s','o','f','t','\\',
                                    'W','i','n','d','o','w','s','\\',
                                    'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
                                    'I','n','t','e','r','n','e','t',' ','S','e','t','t','i','n','g','s','\\',
                                    'Z','o','n','e','s','\\',0};

/********************************************************************
 * get_string_from_reg [internal]
 *
 * helper to get a string from the reg.
 *
 */
static void get_string_from_reg(HKEY hcu, HKEY hklm, LPCWSTR name, LPWSTR out, DWORD maxlen)
{
    DWORD type = REG_SZ;
    DWORD len = maxlen * sizeof(WCHAR);
    DWORD res;

    res = RegQueryValueExW(hcu, name, NULL, &type, (LPBYTE) out, &len);

    if (res && hklm) {
        len = maxlen * sizeof(WCHAR);
        type = REG_SZ;
        res = RegQueryValueExW(hklm, name, NULL, &type, (LPBYTE) out, &len);
    }

    if (res) {
        TRACE("%s failed: %d\n", debugstr_w(name), res);
        *out = '\0';
    }
}

/********************************************************************
 * get_dword_from_reg [internal]
 *
 * helper to get a dword from the reg.
 *
 */
static void get_dword_from_reg(HKEY hcu, HKEY hklm, LPCWSTR name, LPDWORD out)
{
    DWORD type = REG_DWORD;
    DWORD len = sizeof(DWORD);
    DWORD res;

    res = RegQueryValueExW(hcu, name, NULL, &type, (LPBYTE) out, &len);

    if (res && hklm) {
        len = sizeof(DWORD);
        type = REG_DWORD;
        res = RegQueryValueExW(hklm, name, NULL, &type, (LPBYTE) out, &len);
    }

    if (res) {
        TRACE("%s failed: %d\n", debugstr_w(name), res);
        *out = 0;
    }
}

static HRESULT get_zone_from_reg(LPCWSTR schema, DWORD *zone)
{
    DWORD res, size;
    HKEY hkey;

    static const WCHAR wszZoneMapProtocolKey[] =
        {'S','o','f','t','w','a','r','e','\\',
         'M','i','c','r','o','s','o','f','t','\\',
         'W','i','n','d','o','w','s','\\',
         'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
         'I','n','t','e','r','n','e','t',' ','S','e','t','t','i','n','g','s','\\',
         'Z','o','n','e','M','a','p','\\',
         'P','r','o','t','o','c','o','l','D','e','f','a','u','l','t','s',0};

    res = RegOpenKeyW(HKEY_CURRENT_USER, wszZoneMapProtocolKey, &hkey);
    if(res != ERROR_SUCCESS) {
        ERR("Could not open key %s\n", debugstr_w(wszZoneMapProtocolKey));
        return E_UNEXPECTED;
    }

    size = sizeof(DWORD);
    res = RegQueryValueExW(hkey, schema, NULL, NULL, (PBYTE)zone, &size);
    RegCloseKey(hkey);
    if(res == ERROR_SUCCESS)
        return S_OK;

    res = RegOpenKeyW(HKEY_LOCAL_MACHINE, wszZoneMapProtocolKey, &hkey);
    if(res != ERROR_SUCCESS) {
        ERR("Could not open key %s\n", debugstr_w(wszZoneMapProtocolKey));
        return E_UNEXPECTED;
    }

    size = sizeof(DWORD);
    res = RegQueryValueExW(hkey, schema, NULL, NULL, (PBYTE)zone, &size);
    RegCloseKey(hkey);
    if(res == ERROR_SUCCESS)
        return S_OK;

    *zone = 3;
    return S_OK;
}

static HRESULT map_url_to_zone(LPCWSTR url, DWORD *zone, LPWSTR *ret_url)
{
    LPWSTR secur_url;
    WCHAR schema[64];
    DWORD size=0;
    HRESULT hres;

    *zone = -1;

    hres = CoInternetGetSecurityUrl(url, &secur_url, PSU_SECURITY_URL_ONLY, 0);
    if(hres != S_OK) {
        size = strlenW(url)*sizeof(WCHAR);

        secur_url = heap_alloc(size);
        if(!secur_url)
            return E_OUTOFMEMORY;

        memcpy(secur_url, url, size);
    }

    hres = CoInternetParseUrl(secur_url, PARSE_SCHEMA, 0, schema, sizeof(schema)/sizeof(WCHAR), &size, 0);
    if(FAILED(hres) || !*schema) {
        heap_free(secur_url);
        return E_INVALIDARG;
    }

    /* file protocol is a special case */
    if(!strcmpW(schema, fileW)) {
        WCHAR path[MAX_PATH], root[20];
        WCHAR *ptr;

        hres = CoInternetParseUrl(secur_url, PARSE_PATH_FROM_URL, 0, path,
                sizeof(path)/sizeof(WCHAR), &size, 0);

        if(SUCCEEDED(hres) && (ptr = strchrW(path, '\\')) && ptr-path < sizeof(root)/sizeof(WCHAR)) {
            UINT type;

            memcpy(root, path, (ptr-path)*sizeof(WCHAR));
            root[ptr-path] = 0;

            type = GetDriveTypeW(root);

            switch(type) {
            case DRIVE_UNKNOWN:
            case DRIVE_NO_ROOT_DIR:
                break;
            case DRIVE_REMOVABLE:
            case DRIVE_FIXED:
            case DRIVE_CDROM:
            case DRIVE_RAMDISK:
                *zone = 0;
                hres = S_OK;
                break;
            case DRIVE_REMOTE:
                *zone = 3;
                hres = S_OK;
                break;
            default:
                FIXME("unsupported drive type %d\n", type);
            }
        }
    }

    if(*zone == -1) {
        WARN("domains are not yet implemented\n");
        hres = get_zone_from_reg(schema, zone);
    }

    if(FAILED(hres) || !ret_url)
        heap_free(secur_url);
    else
        *ret_url = secur_url;

    return hres;
}

static HRESULT open_zone_key(HKEY parent_key, DWORD zone, HKEY *hkey)
{
    static const WCHAR wszFormat[] = {'%','s','%','l','d',0};

    WCHAR key_name[sizeof(wszZonesKey)/sizeof(WCHAR)+8];
    DWORD res;

    wsprintfW(key_name, wszFormat, wszZonesKey, zone);

    res = RegOpenKeyW(parent_key, key_name, hkey);

    if(res != ERROR_SUCCESS) {
        WARN("RegOpenKey failed\n");
        return E_INVALIDARG;
    }

    return S_OK;
}

static HRESULT get_action_policy(DWORD zone, DWORD action, BYTE *policy, DWORD size, URLZONEREG zone_reg)
{
    HKEY parent_key;
    HKEY hkey;
    LONG res;
    HRESULT hres;

    switch(action) {
    case URLACTION_SCRIPT_OVERRIDE_SAFETY:
    case URLACTION_ACTIVEX_OVERRIDE_SCRIPT_SAFETY:
        *(DWORD*)policy = URLPOLICY_DISALLOW;
        return S_OK;
    }

    switch(zone_reg) {
    case URLZONEREG_DEFAULT:
    case URLZONEREG_HKCU:
        parent_key = HKEY_CURRENT_USER;
        break;
    case URLZONEREG_HKLM:
        parent_key = HKEY_LOCAL_MACHINE;
        break;
    default:
        WARN("Unknown URLZONEREG: %d\n", zone_reg);
        return E_FAIL;
    };

    hres = open_zone_key(parent_key, zone, &hkey);
    if(SUCCEEDED(hres)) {
        WCHAR action_str[16];
        DWORD len = size;

        static const WCHAR formatW[] = {'%','X',0};

        wsprintfW(action_str, formatW, action);

        res = RegQueryValueExW(hkey, action_str, NULL, NULL, policy, &len);
        if(res == ERROR_MORE_DATA) {
            hres = E_INVALIDARG;
        }else if(res == ERROR_FILE_NOT_FOUND) {
            hres = E_FAIL;
        }else if(res != ERROR_SUCCESS) {
            ERR("RegQueryValue failed: %d\n", res);
            hres = E_UNEXPECTED;
        }

        RegCloseKey(hkey);
    }

    if(FAILED(hres) && zone_reg == URLZONEREG_DEFAULT)
        return get_action_policy(zone, action, policy, size, URLZONEREG_HKLM);

    return hres;
}

/***********************************************************************
 *           InternetSecurityManager implementation
 *
 */
typedef struct {
    IInternetSecurityManager IInternetSecurityManager_iface;

    LONG ref;

    IInternetSecurityMgrSite *mgrsite;
    IInternetSecurityManager *custom_manager;
} SecManagerImpl;

static inline SecManagerImpl *impl_from_IInternetSecurityManager(IInternetSecurityManager *iface)
{
    return CONTAINING_RECORD(iface, SecManagerImpl, IInternetSecurityManager_iface);
}

static HRESULT WINAPI SecManagerImpl_QueryInterface(IInternetSecurityManager* iface,REFIID riid,void** ppvObject)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);

    TRACE("(%p)->(%s,%p)\n",This,debugstr_guid(riid),ppvObject);

    /* Perform a sanity check on the parameters.*/
    if ( (This==0) || (ppvObject==0) )
	return E_INVALIDARG;

    /* Initialize the return parameter */
    *ppvObject = 0;

    /* Compare the riid with the interface IDs implemented by this object.*/
    if (IsEqualIID(&IID_IUnknown, riid) ||
        IsEqualIID(&IID_IInternetSecurityManager, riid))
        *ppvObject = iface;

    /* Check that we obtained an interface.*/
    if (!*ppvObject) {
        WARN("not supported interface %s\n", debugstr_guid(riid));
        return E_NOINTERFACE;
    }

    /* Query Interface always increases the reference count by one when it is successful */
    IInternetSecurityManager_AddRef(iface);

    return S_OK;
}

static ULONG WINAPI SecManagerImpl_AddRef(IInternetSecurityManager* iface)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);
    ULONG refCount = InterlockedIncrement(&This->ref);

    TRACE("(%p) ref=%u\n", This, refCount);

    return refCount;
}

static ULONG WINAPI SecManagerImpl_Release(IInternetSecurityManager* iface)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);
    ULONG refCount = InterlockedDecrement(&This->ref);

    TRACE("(%p) ref=%u\n", This, refCount);

    /* destroy the object if there's no more reference on it */
    if (!refCount){
        if(This->mgrsite)
            IInternetSecurityMgrSite_Release(This->mgrsite);
        if(This->custom_manager)
            IInternetSecurityManager_Release(This->custom_manager);

        heap_free(This);

        URLMON_UnlockModule();
    }

    return refCount;
}

static HRESULT WINAPI SecManagerImpl_SetSecuritySite(IInternetSecurityManager *iface,
                                                     IInternetSecurityMgrSite *pSite)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);

    TRACE("(%p)->(%p)\n", This, pSite);

    if(This->mgrsite)
        IInternetSecurityMgrSite_Release(This->mgrsite);

    if(This->custom_manager) {
        IInternetSecurityManager_Release(This->custom_manager);
        This->custom_manager = NULL;
    }

    This->mgrsite = pSite;

    if(pSite) {
        IServiceProvider *servprov;
        HRESULT hres;

        IInternetSecurityMgrSite_AddRef(pSite);

        hres = IInternetSecurityMgrSite_QueryInterface(pSite, &IID_IServiceProvider,
                (void**)&servprov);
        if(SUCCEEDED(hres)) {
            IServiceProvider_QueryService(servprov, &SID_SInternetSecurityManager,
                    &IID_IInternetSecurityManager, (void**)&This->custom_manager);
            IServiceProvider_Release(servprov);
        }
    }

    return S_OK;
}

static HRESULT WINAPI SecManagerImpl_GetSecuritySite(IInternetSecurityManager *iface,
                                                     IInternetSecurityMgrSite **ppSite)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);

    TRACE("(%p)->(%p)\n", This, ppSite);

    if(!ppSite)
        return E_INVALIDARG;

    if(This->mgrsite)
        IInternetSecurityMgrSite_AddRef(This->mgrsite);

    *ppSite = This->mgrsite;
    return S_OK;
}

static HRESULT WINAPI SecManagerImpl_MapUrlToZone(IInternetSecurityManager *iface,
                                                  LPCWSTR pwszUrl, DWORD *pdwZone,
                                                  DWORD dwFlags)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);
    HRESULT hres;

    TRACE("(%p)->(%s %p %08x)\n", iface, debugstr_w(pwszUrl), pdwZone, dwFlags);

    if(This->custom_manager) {
        hres = IInternetSecurityManager_MapUrlToZone(This->custom_manager,
                pwszUrl, pdwZone, dwFlags);
        if(hres != INET_E_DEFAULT_ACTION)
            return hres;
    }

    if(!pwszUrl) {
        *pdwZone = -1;
        return E_INVALIDARG;
    }

    if(dwFlags)
        FIXME("not supported flags: %08x\n", dwFlags);

    return map_url_to_zone(pwszUrl, pdwZone, NULL);
}

static HRESULT WINAPI SecManagerImpl_GetSecurityId(IInternetSecurityManager *iface, 
        LPCWSTR pwszUrl, BYTE *pbSecurityId, DWORD *pcbSecurityId, DWORD_PTR dwReserved)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);
    LPWSTR url, ptr, ptr2;
    DWORD zone, len;
    HRESULT hres;

    static const WCHAR wszFile[] = {'f','i','l','e',':'};

    TRACE("(%p)->(%s %p %p %08lx)\n", iface, debugstr_w(pwszUrl), pbSecurityId,
          pcbSecurityId, dwReserved);

    if(This->custom_manager) {
        hres = IInternetSecurityManager_GetSecurityId(This->custom_manager,
                pwszUrl, pbSecurityId, pcbSecurityId, dwReserved);
        if(hres != INET_E_DEFAULT_ACTION)
            return hres;
    }

    if(!pwszUrl || !pbSecurityId || !pcbSecurityId)
        return E_INVALIDARG;

    if(dwReserved)
        FIXME("dwReserved is not supported\n");

    hres = map_url_to_zone(pwszUrl, &zone, &url);
    if(FAILED(hres))
        return hres == 0x80041001 ? E_INVALIDARG : hres;

    /* file protocol is a special case */
    if(strlenW(url) >= sizeof(wszFile)/sizeof(WCHAR)
            && !memcmp(url, wszFile, sizeof(wszFile)) && strchrW(url, '\\')) {

        static const BYTE secidFile[] = {'f','i','l','e',':'};

        heap_free(url);

        if(*pcbSecurityId < sizeof(secidFile)+sizeof(zone))
            return HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);

        memcpy(pbSecurityId, secidFile, sizeof(secidFile));
        *(DWORD*)(pbSecurityId+sizeof(secidFile)) = zone;

        *pcbSecurityId = sizeof(secidFile)+sizeof(zone);
        return S_OK;
    }

    ptr = strchrW(url, ':');
    ptr2 = ++ptr;
    while(*ptr2 == '/')
        ptr2++;
    if(ptr2 != ptr)
        memmove(ptr, ptr2, (strlenW(ptr2)+1)*sizeof(WCHAR));

    ptr = strchrW(ptr, '/');
    if(ptr)
        *ptr = 0;

    len = WideCharToMultiByte(CP_ACP, 0, url, -1, NULL, 0, NULL, NULL)-1;

    if(len+sizeof(DWORD) > *pcbSecurityId) {
        heap_free(url);
        return HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
    }

    WideCharToMultiByte(CP_ACP, 0, url, -1, (LPSTR)pbSecurityId, len, NULL, NULL);
    heap_free(url);

    *(DWORD*)(pbSecurityId+len) = zone;

    *pcbSecurityId = len+sizeof(DWORD);

    return S_OK;
}


static HRESULT WINAPI SecManagerImpl_ProcessUrlAction(IInternetSecurityManager *iface,
                                                      LPCWSTR pwszUrl, DWORD dwAction,
                                                      BYTE *pPolicy, DWORD cbPolicy,
                                                      BYTE *pContext, DWORD cbContext,
                                                      DWORD dwFlags, DWORD dwReserved)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);
    DWORD zone, policy;
    HRESULT hres;

    TRACE("(%p)->(%s %08x %p %08x %p %08x %08x %08x)\n", iface, debugstr_w(pwszUrl), dwAction,
          pPolicy, cbPolicy, pContext, cbContext, dwFlags, dwReserved);

    if(This->custom_manager) {
        hres = IInternetSecurityManager_ProcessUrlAction(This->custom_manager, pwszUrl, dwAction,
                pPolicy, cbPolicy, pContext, cbContext, dwFlags, dwReserved);
        if(hres != INET_E_DEFAULT_ACTION)
            return hres;
    }

    if(dwFlags || dwReserved)
        FIXME("Unsupported arguments\n");

    if(!pwszUrl)
        return E_INVALIDARG;

    hres = map_url_to_zone(pwszUrl, &zone, NULL);
    if(FAILED(hres))
        return hres;

    hres = get_action_policy(zone, dwAction, (BYTE*)&policy, sizeof(policy), URLZONEREG_DEFAULT);
    if(FAILED(hres))
        return hres;

    TRACE("policy %x\n", policy);
    if(cbPolicy >= sizeof(DWORD))
        *(DWORD*)pPolicy = policy;

    switch(GetUrlPolicyPermissions(policy)) {
    case URLPOLICY_ALLOW:
    case URLPOLICY_CHANNEL_SOFTDIST_PRECACHE:
        return S_OK;
    case URLPOLICY_DISALLOW:
        return S_FALSE;
    case URLPOLICY_QUERY:
        FIXME("URLPOLICY_QUERY not implemented\n");
        return E_FAIL;
    default:
        FIXME("Not implemented policy %x\n", policy);
    }

    return E_FAIL;
}
                                               

static HRESULT WINAPI SecManagerImpl_QueryCustomPolicy(IInternetSecurityManager *iface,
                                                       LPCWSTR pwszUrl, REFGUID guidKey,
                                                       BYTE **ppPolicy, DWORD *pcbPolicy,
                                                       BYTE *pContext, DWORD cbContext,
                                                       DWORD dwReserved)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);
    HRESULT hres;

    TRACE("(%p)->(%s %s %p %p %p %08x %08x )\n", iface, debugstr_w(pwszUrl), debugstr_guid(guidKey),
          ppPolicy, pcbPolicy, pContext, cbContext, dwReserved);

    if(This->custom_manager) {
        hres = IInternetSecurityManager_QueryCustomPolicy(This->custom_manager, pwszUrl, guidKey,
                ppPolicy, pcbPolicy, pContext, cbContext, dwReserved);
        if(hres != INET_E_DEFAULT_ACTION)
            return hres;
    }

    WARN("Unknown guidKey %s\n", debugstr_guid(guidKey));
    return HRESULT_FROM_WIN32(ERROR_NOT_FOUND);
}

static HRESULT WINAPI SecManagerImpl_SetZoneMapping(IInternetSecurityManager *iface,
                                                    DWORD dwZone, LPCWSTR pwszPattern, DWORD dwFlags)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);
    HRESULT hres;

    TRACE("(%p)->(%08x %s %08x)\n", iface, dwZone, debugstr_w(pwszPattern),dwFlags);

    if(This->custom_manager) {
        hres = IInternetSecurityManager_SetZoneMapping(This->custom_manager, dwZone,
                pwszPattern, dwFlags);
        if(hres != INET_E_DEFAULT_ACTION)
            return hres;
    }

    FIXME("Default action is not implemented\n");
    return E_NOTIMPL;
}

static HRESULT WINAPI SecManagerImpl_GetZoneMappings(IInternetSecurityManager *iface,
        DWORD dwZone, IEnumString **ppenumString, DWORD dwFlags)
{
    SecManagerImpl *This = impl_from_IInternetSecurityManager(iface);
    HRESULT hres;

    TRACE("(%p)->(%08x %p %08x)\n", iface, dwZone, ppenumString,dwFlags);

    if(This->custom_manager) {
        hres = IInternetSecurityManager_GetZoneMappings(This->custom_manager, dwZone,
                ppenumString, dwFlags);
        if(hres != INET_E_DEFAULT_ACTION)
            return hres;
    }

    FIXME("Default action is not implemented\n");
    return E_NOTIMPL;
}

static const IInternetSecurityManagerVtbl VT_SecManagerImpl =
{
    SecManagerImpl_QueryInterface,
    SecManagerImpl_AddRef,
    SecManagerImpl_Release,
    SecManagerImpl_SetSecuritySite,
    SecManagerImpl_GetSecuritySite,
    SecManagerImpl_MapUrlToZone,
    SecManagerImpl_GetSecurityId,
    SecManagerImpl_ProcessUrlAction,
    SecManagerImpl_QueryCustomPolicy,
    SecManagerImpl_SetZoneMapping,
    SecManagerImpl_GetZoneMappings
};

HRESULT SecManagerImpl_Construct(IUnknown *pUnkOuter, LPVOID *ppobj)
{
    SecManagerImpl *This;

    TRACE("(%p,%p)\n",pUnkOuter,ppobj);
    This = heap_alloc(sizeof(*This));

    /* Initialize the virtual function table. */
    This->IInternetSecurityManager_iface.lpVtbl = &VT_SecManagerImpl;

    This->ref = 1;
    This->mgrsite = NULL;
    This->custom_manager = NULL;

    *ppobj = This;

    URLMON_LockModule();

    return S_OK;
}

/***********************************************************************
 *           InternetZoneManager implementation
 *
 */
typedef struct {
    IInternetZoneManagerEx2 IInternetZoneManagerEx2_iface;
    LONG ref;
    LPDWORD *zonemaps;
    DWORD zonemap_count;
} ZoneMgrImpl;

static inline ZoneMgrImpl *impl_from_IInternetZoneManagerEx2(IInternetZoneManagerEx2 *iface)
{
    return CONTAINING_RECORD(iface, ZoneMgrImpl, IInternetZoneManagerEx2_iface);
}


/***********************************************************************
 * build_zonemap_from_reg [internal]
 *
 * Enumerate the Zones in the Registry and return the Zones in a DWORD-array
 * The number of the Zones is returned in data[0]
 */
static LPDWORD build_zonemap_from_reg(void)
{
    WCHAR name[32];
    HKEY hkey;
    LPDWORD data = NULL;
    DWORD allocated = 6; /* space for the zonecount and Zone "0" up to Zone "4" */
    DWORD used = 0;
    DWORD res;
    DWORD len;


    res = RegOpenKeyW(HKEY_CURRENT_USER, wszZonesKey, &hkey);
    if (res)
        return NULL;

    data = heap_alloc(allocated * sizeof(DWORD));
    if (!data)
        goto cleanup;

    while (!res) {
        name[0] = '\0';
        len = sizeof(name) / sizeof(name[0]);
        res = RegEnumKeyExW(hkey, used, name, &len, NULL, NULL, NULL, NULL);

        if (!res) {
            used++;
            if (used == allocated) {
                LPDWORD new_data;

                allocated *= 2;
                new_data = heap_realloc_zero(data, allocated * sizeof(DWORD));
                if (!new_data)
                    goto cleanup;

                data = new_data;
            }
            data[used] = atoiW(name);
        }
    }
    if (used) {
        RegCloseKey(hkey);
        data[0] = used;
        return data;
    }

cleanup:
    /* something failed */
    RegCloseKey(hkey);
    heap_free(data);
    return NULL;
}

/********************************************************************
 *      IInternetZoneManager_QueryInterface
 */
static HRESULT WINAPI ZoneMgrImpl_QueryInterface(IInternetZoneManagerEx2* iface, REFIID riid, void** ppvObject)
{
    ZoneMgrImpl* This = impl_from_IInternetZoneManagerEx2(iface);

    TRACE("(%p)->(%s,%p)\n", This, debugstr_guid(riid), ppvObject);

    if(!This || !ppvObject)
        return E_INVALIDARG;

    if(IsEqualIID(&IID_IUnknown, riid)) {
        TRACE("(%p)->(IID_IUnknown %p)\n", This, ppvObject);
    }else if(IsEqualIID(&IID_IInternetZoneManager, riid)) {
        TRACE("(%p)->(IID_InternetZoneManager %p)\n", This, ppvObject);
    }else if(IsEqualIID(&IID_IInternetZoneManagerEx, riid)) {
        TRACE("(%p)->(IID_InternetZoneManagerEx %p)\n", This, ppvObject);
    }else if(IsEqualIID(&IID_IInternetZoneManagerEx2, riid)) {
        TRACE("(%p)->(IID_InternetZoneManagerEx2 %p)\n", This, ppvObject);
    }
    else
    {
        FIXME("Unknown interface: %s\n", debugstr_guid(riid));
        *ppvObject = NULL;
        return E_NOINTERFACE;
    }

    *ppvObject = iface;
    IInternetZoneManager_AddRef(iface);
    return S_OK;
}

/********************************************************************
 *      IInternetZoneManager_AddRef
 */
static ULONG WINAPI ZoneMgrImpl_AddRef(IInternetZoneManagerEx2* iface)
{
    ZoneMgrImpl* This = impl_from_IInternetZoneManagerEx2(iface);
    ULONG refCount = InterlockedIncrement(&This->ref);

    TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);

    return refCount;
}

/********************************************************************
 *      IInternetZoneManager_Release
 */
static ULONG WINAPI ZoneMgrImpl_Release(IInternetZoneManagerEx2* iface)
{
    ZoneMgrImpl* This = impl_from_IInternetZoneManagerEx2(iface);
    ULONG refCount = InterlockedDecrement(&This->ref);

    TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);

    if(!refCount) {
        while (This->zonemap_count) heap_free(This->zonemaps[--This->zonemap_count]);
        heap_free(This->zonemaps);
        heap_free(This);
        URLMON_UnlockModule();
    }
    
    return refCount;
}

/********************************************************************
 *      IInternetZoneManager_GetZoneAttributes
 */
static HRESULT WINAPI ZoneMgrImpl_GetZoneAttributes(IInternetZoneManagerEx2* iface,
                                                    DWORD dwZone,
                                                    ZONEATTRIBUTES* pZoneAttributes)
{
    ZoneMgrImpl* This = impl_from_IInternetZoneManagerEx2(iface);
    HRESULT hr;
    HKEY hcu;
    HKEY hklm = NULL;

    TRACE("(%p)->(%d %p)\n", This, dwZone, pZoneAttributes);

    if (!pZoneAttributes)
        return E_INVALIDARG;

    hr = open_zone_key(HKEY_CURRENT_USER, dwZone, &hcu);
    if (FAILED(hr))
        return S_OK;  /* IE6 and older returned E_FAIL here */

    hr = open_zone_key(HKEY_LOCAL_MACHINE, dwZone, &hklm);
    if (FAILED(hr))
        TRACE("Zone %d not in HKLM\n", dwZone);

    get_string_from_reg(hcu, hklm, displaynameW, pZoneAttributes->szDisplayName, MAX_ZONE_PATH);
    get_string_from_reg(hcu, hklm, descriptionW, pZoneAttributes->szDescription, MAX_ZONE_DESCRIPTION);
    get_string_from_reg(hcu, hklm, iconW, pZoneAttributes->szIconPath, MAX_ZONE_PATH);
    get_dword_from_reg(hcu, hklm, minlevelW, &pZoneAttributes->dwTemplateMinLevel);
    get_dword_from_reg(hcu, hklm, currentlevelW, &pZoneAttributes->dwTemplateCurrentLevel);
    get_dword_from_reg(hcu, hklm, recommendedlevelW, &pZoneAttributes->dwTemplateRecommended);
    get_dword_from_reg(hcu, hklm, flagsW, &pZoneAttributes->dwFlags);

    RegCloseKey(hklm);
    RegCloseKey(hcu);
    return S_OK;
}

/********************************************************************
 *      IInternetZoneManager_SetZoneAttributes
 */
static HRESULT WINAPI ZoneMgrImpl_SetZoneAttributes(IInternetZoneManagerEx2* iface,
                                                    DWORD dwZone,
                                                    ZONEATTRIBUTES* pZoneAttributes)
{
    FIXME("(%p)->(%08x %p) stub\n", iface, dwZone, pZoneAttributes);
    return E_NOTIMPL;
}

/********************************************************************
 *      IInternetZoneManager_GetZoneCustomPolicy
 */
static HRESULT WINAPI ZoneMgrImpl_GetZoneCustomPolicy(IInternetZoneManagerEx2* iface,
                                                      DWORD dwZone,
                                                      REFGUID guidKey,
                                                      BYTE** ppPolicy,
                                                      DWORD* pcbPolicy,
                                                      URLZONEREG ulrZoneReg)
{
    FIXME("(%p)->(%08x %s %p %p %08x) stub\n", iface, dwZone, debugstr_guid(guidKey),
                                                    ppPolicy, pcbPolicy, ulrZoneReg);
    return E_NOTIMPL;
}

/********************************************************************
 *      IInternetZoneManager_SetZoneCustomPolicy
 */
static HRESULT WINAPI ZoneMgrImpl_SetZoneCustomPolicy(IInternetZoneManagerEx2* iface,
                                                      DWORD dwZone,
                                                      REFGUID guidKey,
                                                      BYTE* ppPolicy,
                                                      DWORD cbPolicy,
                                                      URLZONEREG ulrZoneReg)
{
    FIXME("(%p)->(%08x %s %p %08x %08x) stub\n", iface, dwZone, debugstr_guid(guidKey),
                                                    ppPolicy, cbPolicy, ulrZoneReg);
    return E_NOTIMPL;
}

/********************************************************************
 *      IInternetZoneManager_GetZoneActionPolicy
 */
static HRESULT WINAPI ZoneMgrImpl_GetZoneActionPolicy(IInternetZoneManagerEx2* iface,
        DWORD dwZone, DWORD dwAction, BYTE* pPolicy, DWORD cbPolicy, URLZONEREG urlZoneReg)
{
    TRACE("(%p)->(%d %08x %p %d %d)\n", iface, dwZone, dwAction, pPolicy,
            cbPolicy, urlZoneReg);

    if(!pPolicy)
        return E_INVALIDARG;

    return get_action_policy(dwZone, dwAction, pPolicy, cbPolicy, urlZoneReg);
}

/********************************************************************
 *      IInternetZoneManager_SetZoneActionPolicy
 */
static HRESULT WINAPI ZoneMgrImpl_SetZoneActionPolicy(IInternetZoneManagerEx2* iface,
                                                      DWORD dwZone,
                                                      DWORD dwAction,
                                                      BYTE* pPolicy,
                                                      DWORD cbPolicy,
                                                      URLZONEREG urlZoneReg)
{
    FIXME("(%p)->(%08x %08x %p %08x %08x) stub\n", iface, dwZone, dwAction, pPolicy,
                                                       cbPolicy, urlZoneReg);
    return E_NOTIMPL;
}

/********************************************************************
 *      IInternetZoneManager_PromptAction
 */
static HRESULT WINAPI ZoneMgrImpl_PromptAction(IInternetZoneManagerEx2* iface,
                                               DWORD dwAction,
                                               HWND hwndParent,
                                               LPCWSTR pwszUrl,
                                               LPCWSTR pwszText,
                                               DWORD dwPromptFlags)
{
    FIXME("%p %08x %p %s %s %08x\n", iface, dwAction, hwndParent,
          debugstr_w(pwszUrl), debugstr_w(pwszText), dwPromptFlags );
    return E_NOTIMPL;
}

/********************************************************************
 *      IInternetZoneManager_LogAction
 */
static HRESULT WINAPI ZoneMgrImpl_LogAction(IInternetZoneManagerEx2* iface,
                                            DWORD dwAction,
                                            LPCWSTR pwszUrl,
                                            LPCWSTR pwszText,
                                            DWORD dwLogFlags)
{
    FIXME("(%p)->(%08x %s %s %08x) stub\n", iface, dwAction, debugstr_w(pwszUrl),
                                              debugstr_w(pwszText), dwLogFlags);
    return E_NOTIMPL;
}

/********************************************************************
 *      IInternetZoneManager_CreateZoneEnumerator
 */
static HRESULT WINAPI ZoneMgrImpl_CreateZoneEnumerator(IInternetZoneManagerEx2* iface,
                                                       DWORD* pdwEnum,
                                                       DWORD* pdwCount,
                                                       DWORD dwFlags)
{
    ZoneMgrImpl* This = impl_from_IInternetZoneManagerEx2(iface);
    LPDWORD * new_maps;
    LPDWORD data;
    DWORD i;

    TRACE("(%p)->(%p, %p, 0x%08x)\n", This, pdwEnum, pdwCount, dwFlags);
    if (!pdwEnum || !pdwCount || (dwFlags != 0))
        return E_INVALIDARG;

    data = build_zonemap_from_reg();
    TRACE("found %d zones\n", data ? data[0] : -1);

    if (!data)
        return E_FAIL;

    for (i = 0; i < This->zonemap_count; i++) {
        if (This->zonemaps && !This->zonemaps[i]) {
            This->zonemaps[i] = data;
            *pdwEnum = i;
            *pdwCount = data[0];
            return S_OK;
        }
    }

    if (This->zonemaps) {
        /* try to double the nr. of pointers in the array */
        new_maps = heap_realloc_zero(This->zonemaps, This->zonemap_count * 2 * sizeof(LPDWORD));
        if (new_maps)
            This->zonemap_count *= 2;
    }
    else
    {
        This->zonemap_count = 2;
        new_maps = heap_alloc_zero(This->zonemap_count * sizeof(LPDWORD));
    }

    if (!new_maps) {
        heap_free(data);
        return E_FAIL;
    }
    This->zonemaps = new_maps;
    This->zonemaps[i] = data;
    *pdwEnum = i;
    *pdwCount = data[0];
    return S_OK;
}

/********************************************************************
 *      IInternetZoneManager_GetZoneAt
 */
static HRESULT WINAPI ZoneMgrImpl_GetZoneAt(IInternetZoneManagerEx2* iface,
                                            DWORD dwEnum,
                                            DWORD dwIndex,
                                            DWORD* pdwZone)
{
    ZoneMgrImpl* This = impl_from_IInternetZoneManagerEx2(iface);
    LPDWORD data;

    TRACE("(%p)->(0x%08x, %d, %p)\n", This, dwEnum, dwIndex, pdwZone);

    /* make sure, that dwEnum and dwIndex are in the valid range */
    if (dwEnum < This->zonemap_count) {
        if ((data = This->zonemaps[dwEnum])) {
            if (dwIndex < data[0]) {
                *pdwZone = data[dwIndex + 1];
                return S_OK;
            }
        }
    }
    return E_INVALIDARG;
}

/********************************************************************
 *      IInternetZoneManager_DestroyZoneEnumerator
 */
static HRESULT WINAPI ZoneMgrImpl_DestroyZoneEnumerator(IInternetZoneManagerEx2* iface,
                                                        DWORD dwEnum)
{
    ZoneMgrImpl* This = impl_from_IInternetZoneManagerEx2(iface);
    LPDWORD data;

    TRACE("(%p)->(0x%08x)\n", This, dwEnum);
    /* make sure, that dwEnum is valid */
    if (dwEnum < This->zonemap_count) {
        if ((data = This->zonemaps[dwEnum])) {
            This->zonemaps[dwEnum] = NULL;
            heap_free(data);
            return S_OK;
        }
    }
    return E_INVALIDARG;
}

/********************************************************************
 *      IInternetZoneManager_CopyTemplatePoliciesToZone
 */
static HRESULT WINAPI ZoneMgrImpl_CopyTemplatePoliciesToZone(IInternetZoneManagerEx2* iface,
                                                             DWORD dwTemplate,
                                                             DWORD dwZone,
                                                             DWORD dwReserved)
{
    FIXME("(%p)->(%08x %08x %08x) stub\n", iface, dwTemplate, dwZone, dwReserved);
    return E_NOTIMPL;
}

/********************************************************************
 *      IInternetZoneManagerEx_GetZoneActionPolicyEx
 */
static HRESULT WINAPI ZoneMgrImpl_GetZoneActionPolicyEx(IInternetZoneManagerEx2* iface,
                                                        DWORD dwZone,
                                                        DWORD dwAction,
                                                        BYTE* pPolicy,
                                                        DWORD cbPolicy,
                                                        URLZONEREG urlZoneReg,
                                                        DWORD dwFlags)
{
    TRACE("(%p)->(%d, 0x%x, %p, %d, %d, 0x%x)\n", iface, dwZone,
            dwAction, pPolicy, cbPolicy, urlZoneReg, dwFlags);

    if(!pPolicy)
        return E_INVALIDARG;

    if (dwFlags)
        FIXME("dwFlags 0x%x ignored\n", dwFlags);

    return get_action_policy(dwZone, dwAction, pPolicy, cbPolicy, urlZoneReg);
}

/********************************************************************
 *      IInternetZoneManagerEx_SetZoneActionPolicyEx
 */
static HRESULT WINAPI ZoneMgrImpl_SetZoneActionPolicyEx(IInternetZoneManagerEx2* iface,
                                                        DWORD dwZone,
                                                        DWORD dwAction,
                                                        BYTE* pPolicy,
                                                        DWORD cbPolicy,
                                                        URLZONEREG urlZoneReg,
                                                        DWORD dwFlags)
{
    FIXME("(%p)->(%d, 0x%x, %p, %d, %d, 0x%x) stub\n", iface, dwZone, dwAction, pPolicy,
                                                       cbPolicy, urlZoneReg, dwFlags);
    return E_NOTIMPL;
}

/********************************************************************
 *      IInternetZoneManagerEx2_GetZoneAttributesEx
 */
static HRESULT WINAPI ZoneMgrImpl_GetZoneAttributesEx(IInternetZoneManagerEx2* iface,
                                                      DWORD dwZone,
                                                      ZONEATTRIBUTES* pZoneAttributes,
                                                      DWORD dwFlags)
{
    TRACE("(%p)->(%d, %p, 0x%x)\n", iface, dwZone, pZoneAttributes, dwFlags);

    if (dwFlags)
        FIXME("dwFlags 0x%x ignored\n", dwFlags);

    return IInternetZoneManager_GetZoneAttributes(iface, dwZone, pZoneAttributes);
}


/********************************************************************
 *      IInternetZoneManagerEx2_GetZoneSecurityState
 */
static HRESULT WINAPI ZoneMgrImpl_GetZoneSecurityState(IInternetZoneManagerEx2* iface,
                                                       DWORD dwZoneIndex,
                                                       BOOL fRespectPolicy,
                                                       LPDWORD pdwState,
                                                       BOOL *pfPolicyEncountered)
{
    FIXME("(%p)->(%d, %d, %p, %p) stub\n", iface, dwZoneIndex, fRespectPolicy,
                                           pdwState, pfPolicyEncountered);

    *pdwState = SECURITY_IE_STATE_GREEN;

    if (pfPolicyEncountered)
        *pfPolicyEncountered = FALSE;

    return S_OK;
}

/********************************************************************
 *      IInternetZoneManagerEx2_GetIESecurityState
 */
static HRESULT WINAPI ZoneMgrImpl_GetIESecurityState(IInternetZoneManagerEx2* iface,
                                                     BOOL fRespectPolicy,
                                                     LPDWORD pdwState,
                                                     BOOL *pfPolicyEncountered,
                                                     BOOL fNoCache)
{
    FIXME("(%p)->(%d, %p, %p, %d) stub\n", iface, fRespectPolicy, pdwState,
                                           pfPolicyEncountered, fNoCache);

    *pdwState = SECURITY_IE_STATE_GREEN;

    if (pfPolicyEncountered)
        *pfPolicyEncountered = FALSE;

    return S_OK;
}

/********************************************************************
 *      IInternetZoneManagerEx2_FixInsecureSettings
 */
static HRESULT WINAPI ZoneMgrImpl_FixInsecureSettings(IInternetZoneManagerEx2* iface)
{
    FIXME("(%p) stub\n", iface);
    return S_OK;
}

/********************************************************************
 *      IInternetZoneManager_Construct
 */
static const IInternetZoneManagerEx2Vtbl ZoneMgrImplVtbl = {
    ZoneMgrImpl_QueryInterface,
    ZoneMgrImpl_AddRef,
    ZoneMgrImpl_Release,
    /* IInternetZoneManager */
    ZoneMgrImpl_GetZoneAttributes,
    ZoneMgrImpl_SetZoneAttributes,
    ZoneMgrImpl_GetZoneCustomPolicy,
    ZoneMgrImpl_SetZoneCustomPolicy,
    ZoneMgrImpl_GetZoneActionPolicy,
    ZoneMgrImpl_SetZoneActionPolicy,
    ZoneMgrImpl_PromptAction,
    ZoneMgrImpl_LogAction,
    ZoneMgrImpl_CreateZoneEnumerator,
    ZoneMgrImpl_GetZoneAt,
    ZoneMgrImpl_DestroyZoneEnumerator,
    ZoneMgrImpl_CopyTemplatePoliciesToZone,
    /* IInternetZoneManagerEx */
    ZoneMgrImpl_GetZoneActionPolicyEx,
    ZoneMgrImpl_SetZoneActionPolicyEx,
    /* IInternetZoneManagerEx2 */
    ZoneMgrImpl_GetZoneAttributesEx,
    ZoneMgrImpl_GetZoneSecurityState,
    ZoneMgrImpl_GetIESecurityState,
    ZoneMgrImpl_FixInsecureSettings,
};

HRESULT ZoneMgrImpl_Construct(IUnknown *pUnkOuter, LPVOID *ppobj)
{
    ZoneMgrImpl* ret = heap_alloc_zero(sizeof(ZoneMgrImpl));

    TRACE("(%p %p)\n", pUnkOuter, ppobj);
    ret->IInternetZoneManagerEx2_iface.lpVtbl = &ZoneMgrImplVtbl;
    ret->ref = 1;
    *ppobj = (IInternetZoneManagerEx*)ret;

    URLMON_LockModule();

    return S_OK;
}

/***********************************************************************
 *           CoInternetCreateSecurityManager (URLMON.@)
 *
 */
HRESULT WINAPI CoInternetCreateSecurityManager( IServiceProvider *pSP,
    IInternetSecurityManager **ppSM, DWORD dwReserved )
{
    TRACE("%p %p %d\n", pSP, ppSM, dwReserved );

    if(pSP)
        FIXME("pSP not supported\n");

    return SecManagerImpl_Construct(NULL, (void**) ppSM);
}

/********************************************************************
 *      CoInternetCreateZoneManager (URLMON.@)
 */
HRESULT WINAPI CoInternetCreateZoneManager(IServiceProvider* pSP, IInternetZoneManager** ppZM, DWORD dwReserved)
{
    TRACE("(%p %p %x)\n", pSP, ppZM, dwReserved);
    return ZoneMgrImpl_Construct(NULL, (void**)ppZM);
}

/********************************************************************
 *      CoInternetGetSecurityUrl (URLMON.@)
 */
HRESULT WINAPI CoInternetGetSecurityUrl(LPCWSTR pwzUrl, LPWSTR *ppwzSecUrl, PSUACTION psuAction, DWORD dwReserved)
{
    WCHAR buf1[INTERNET_MAX_URL_LENGTH], buf2[INTERNET_MAX_URL_LENGTH];
    LPWSTR url, domain;
    DWORD len;
    HRESULT hres;

    TRACE("(%p,%p,%u,%u)\n", pwzUrl, ppwzSecUrl, psuAction, dwReserved);

    url = buf1;
    domain = buf2;
    strcpyW(url, pwzUrl);

    while(1) {
        hres = CoInternetParseUrl(url, PARSE_SECURITY_URL, 0, domain, INTERNET_MAX_URL_LENGTH, &len, 0);
        if(hres!=S_OK || !strcmpW(url, domain))
            break;

        if(url == buf1) {
            url = buf2;
            domain = buf1;
        } else {
            url = buf1;
            domain = buf2;
        }
    }

    if(psuAction==PSU_SECURITY_URL_ONLY) {
        len = lstrlenW(url)+1;
        *ppwzSecUrl = CoTaskMemAlloc(len*sizeof(WCHAR));
        if(!*ppwzSecUrl)
            return E_OUTOFMEMORY;

        memcpy(*ppwzSecUrl, url, len*sizeof(WCHAR));
        return S_OK;
    }

    hres = CoInternetParseUrl(url, PARSE_SECURITY_DOMAIN, 0, domain,
            INTERNET_MAX_URL_LENGTH, &len, 0);
    if(SUCCEEDED(hres)) {
        len++;
        *ppwzSecUrl = CoTaskMemAlloc(len*sizeof(WCHAR));
        if(!*ppwzSecUrl)
            return E_OUTOFMEMORY;

        memcpy(*ppwzSecUrl, domain, len*sizeof(WCHAR));
        return S_OK;
    }

    hres = CoInternetParseUrl(url, PARSE_SCHEMA, 0, domain,
            INTERNET_MAX_URL_LENGTH, &len, 0);
    if(hres == S_OK){
        const WCHAR fileW[] = {'f','i','l','e',0};
        if(!strcmpW(domain, fileW)){
            hres = CoInternetParseUrl(url, PARSE_ROOTDOCUMENT, 0, domain, INTERNET_MAX_URL_LENGTH, &len, 0);
        }else{
            domain[len] = ':';
            hres = CoInternetParseUrl(url, PARSE_DOMAIN, 0, domain+len+1,
                    INTERNET_MAX_URL_LENGTH-len-1, &len, 0);
            if(hres == S_OK) {
                len = lstrlenW(domain)+1;
                *ppwzSecUrl = CoTaskMemAlloc(len*sizeof(WCHAR));
                if(!*ppwzSecUrl)
                    return E_OUTOFMEMORY;

                memcpy(*ppwzSecUrl, domain, len*sizeof(WCHAR));
                return S_OK;
            }
        }
    }else
        return hres;

    len = lstrlenW(url)+1;
    *ppwzSecUrl = CoTaskMemAlloc(len*sizeof(WCHAR));
    if(!*ppwzSecUrl)
        return E_OUTOFMEMORY;

    memcpy(*ppwzSecUrl, url, len*sizeof(WCHAR));
    return S_OK;
}