/*
 * Copyright 2002 Mike McCormack for CodeWeavers
 * Copyright 2004-2006 Juan Lang
 *
 * 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
 *
 * FIXME:
 * - As you can see in the stubs below, support for CRLs and CTLs is missing.
 *   Mostly this should be copy-paste work, and some code (e.g. extended
 *   properties) could be shared between them.
 * - The concept of physical stores and locations isn't implemented.  (This
 *   doesn't mean registry stores et al aren't implemented.  See the PSDK for
 *   registering and enumerating physical stores and locations.)
 * - Many flags, options and whatnot are unimplemented.
 */

#include <assert.h>
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "winreg.h"
#include "winuser.h"
#include "wincrypt.h"
#include "wine/debug.h"
#include "wine/list.h"
#include "excpt.h"
#include "wine/exception.h"
#include "crypt32_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(crypt);

#define WINE_CRYPTCERTSTORE_MAGIC 0x74726563

static const WINE_CONTEXT_INTERFACE gCertInterface = {
    (CreateContextFunc)CertCreateCertificateContext,
    (AddContextToStoreFunc)CertAddCertificateContextToStore,
    (AddEncodedContextToStoreFunc)CertAddEncodedCertificateToStore,
    (DuplicateContextFunc)CertDuplicateCertificateContext,
    (EnumContextsInStoreFunc)CertEnumCertificatesInStore,
    (GetContextPropertyFunc)CertGetCertificateContextProperty,
    (SetContextPropertyFunc)CertSetCertificateContextProperty,
    (SerializeElementFunc)CertSerializeCertificateStoreElement,
    (FreeContextFunc)CertFreeCertificateContext,
    (DeleteContextFunc)CertDeleteCertificateFromStore,
};
PCWINE_CONTEXT_INTERFACE pCertInterface = &gCertInterface;

static const WINE_CONTEXT_INTERFACE gCRLInterface = {
    (CreateContextFunc)CertCreateCRLContext,
    (AddContextToStoreFunc)CertAddCRLContextToStore,
    (AddEncodedContextToStoreFunc)CertAddEncodedCRLToStore,
    (DuplicateContextFunc)CertDuplicateCRLContext,
    (EnumContextsInStoreFunc)CertEnumCRLsInStore,
    (GetContextPropertyFunc)CertGetCRLContextProperty,
    (SetContextPropertyFunc)CertSetCRLContextProperty,
    (SerializeElementFunc)CertSerializeCRLStoreElement,
    (FreeContextFunc)CertFreeCRLContext,
    (DeleteContextFunc)CertDeleteCRLFromStore,
};
PCWINE_CONTEXT_INTERFACE pCRLInterface = &gCRLInterface;

static const WINE_CONTEXT_INTERFACE gCTLInterface = {
    (CreateContextFunc)CertCreateCTLContext,
    (AddContextToStoreFunc)CertAddCTLContextToStore,
    (AddEncodedContextToStoreFunc)CertAddEncodedCTLToStore,
    (DuplicateContextFunc)CertDuplicateCTLContext,
    (EnumContextsInStoreFunc)CertEnumCTLsInStore,
    (GetContextPropertyFunc)CertGetCTLContextProperty,
    (SetContextPropertyFunc)CertSetCTLContextProperty,
    (SerializeElementFunc)CertSerializeCTLStoreElement,
    (FreeContextFunc)CertFreeCTLContext,
    (DeleteContextFunc)CertDeleteCTLFromStore,
};
PCWINE_CONTEXT_INTERFACE pCTLInterface = &gCTLInterface;

struct WINE_CRYPTCERTSTORE;

typedef struct WINE_CRYPTCERTSTORE * (*StoreOpenFunc)(HCRYPTPROV hCryptProv,
 DWORD dwFlags, const void *pvPara);

struct _WINE_CERT_CONTEXT;

/* Called to enumerate the next certificate in a store. */
typedef struct _WINE_CERT_CONTEXT * (*EnumCertFunc)
 (struct WINE_CRYPTCERTSTORE *store, struct _WINE_CERT_CONTEXT *pPrev);

/* Called to add a certificate context to a store.  If toReplace is not NULL,
 * context replaces toReplace in the store, and access checks should not be
 * performed.  Otherwise context is a new context, and it should only be
 * added if the store allows it.  If ppStoreContext is not NULL, the added
 * context should be returned in *ppStoreContext.
 */
typedef BOOL (*AddCertFunc)(struct WINE_CRYPTCERTSTORE *store,
 struct _WINE_CERT_CONTEXT *context, struct _WINE_CERT_CONTEXT *toReplace,
 PCCERT_CONTEXT *ppStoreContext);

typedef enum _CertStoreType {
    StoreTypeMem,
    StoreTypeCollection,
    StoreTypeProvider,
} CertStoreType;

/* A cert store is polymorphic through the use of function pointers.  A type
 * is still needed to distinguish collection stores from other types.
 * On the function pointers:
 * - closeStore is called when the store's ref count becomes 0
 * - control is optional, but should be implemented by any store that supports
 *   persistence
 */
typedef struct WINE_CRYPTCERTSTORE
{
    DWORD                           dwMagic;
    LONG                            ref;
    DWORD                           dwOpenFlags;
    HCRYPTPROV                      cryptProv;
    CertStoreType                   type;
    PFN_CERT_STORE_PROV_CLOSE       closeStore;
    AddCertFunc                     addCert;
    EnumCertFunc                    enumCert;
    PFN_CERT_STORE_PROV_DELETE_CERT deleteCert;
    PFN_CERT_STORE_PROV_CONTROL     control;    /* optional */
} WINECRYPT_CERTSTORE, *PWINECRYPT_CERTSTORE;

typedef enum _ContextType {
    ContextTypeData,
    ContextTypeLink,
} ContextType;

/* A certificate context.  This is the base type, and the two real types
 * (data and link) derive from it.  Each one can be cast to a PCCERT_CONTEXT.
 */
typedef struct _WINE_CERT_CONTEXT
{
    CERT_CONTEXT cert;
    LONG         ref;
    ContextType  type;
} WINE_CERT_CONTEXT, *PWINE_CERT_CONTEXT;
typedef const struct _WINE_CERT_CONTEXT *PCWINE_CERT_CONTEXT;

typedef struct _WINE_CERT_CONTEXT_DATA
{
    CERT_CONTEXT           cert;
    LONG                   ref;
    ContextType            type; /* always ContextTypeData */
    PCONTEXT_PROPERTY_LIST properties;
} WINE_CERT_CONTEXT_DATA, *PWINE_CERT_CONTEXT_DATA;
typedef const struct _WINE_CERT_CONTEXT_DATA PCWINE_CERT_CONTEXT_DATA;

typedef struct _WINE_CERT_CONTEXT_LINK
{
    CERT_CONTEXT       cert;
    LONG               ref;
    ContextType        type; /* always ContextTypeLink */
    PWINE_CERT_CONTEXT linked;
} WINE_CERT_CONTEXT_LINK, *PWINE_CERT_CONTEXT_LINK;
typedef const struct _WINE_CERT_CONTEXT_LINK PCWINE_CERT_CONTEXT_LINK;

/* A mem store has a list of these.  They're also returned by the mem store
 * during enumeration.
 */
typedef struct _WINE_CERT_LIST_ENTRY
{
    WINE_CERT_CONTEXT_LINK cert;
    struct list entry;
} WINE_CERT_LIST_ENTRY, *PWINE_CERT_LIST_ENTRY;

typedef struct _WINE_MEMSTORE
{
    WINECRYPT_CERTSTORE hdr;
    CRITICAL_SECTION    cs;
    struct list         certs;
} WINE_MEMSTORE, *PWINE_MEMSTORE;

typedef struct _WINE_HASH_TO_DELETE
{
    BYTE        hash[20];
    struct list entry;
} WINE_HASH_TO_DELETE, *PWINE_HASH_TO_DELETE;

typedef struct _WINE_REGSTOREINFO
{
    DWORD                dwOpenFlags;
    HCRYPTPROV           cryptProv;
    PWINECRYPT_CERTSTORE memStore;
    HKEY                 key;
    BOOL                 dirty;
    CRITICAL_SECTION     cs;
    struct list          certsToDelete;
} WINE_REGSTOREINFO, *PWINE_REGSTOREINFO;

typedef struct _WINE_STORE_LIST_ENTRY
{
    PWINECRYPT_CERTSTORE store;
    DWORD                dwUpdateFlags;
    DWORD                dwPriority;
    struct list          entry;
} WINE_STORE_LIST_ENTRY, *PWINE_STORE_LIST_ENTRY;

/* Returned by a collection store during enumeration.
 * Note: relies on the list entry being valid after use, which a number of
 * conditions might make untrue (reentrancy, closing a collection store before
 * continuing an enumeration on it, ...).  The tests seem to indicate this
 * sort of unsafety is okay, since Windows isn't well-behaved in these
 * scenarios either.
 */
typedef struct _WINE_COLLECTION_CERT_CONTEXT
{
    WINE_CERT_CONTEXT_LINK  cert;
    PWINE_STORE_LIST_ENTRY storeEntry;
} WINE_COLLECTION_CERT_CONTEXT, *PWINE_COLLECTION_CERT_CONTEXT;

typedef struct _WINE_COLLECTIONSTORE
{
    WINECRYPT_CERTSTORE hdr;
    CRITICAL_SECTION    cs;
    struct list         stores;
} WINE_COLLECTIONSTORE, *PWINE_COLLECTIONSTORE;

typedef struct _WINE_PROVIDERSTORE
{
    WINECRYPT_CERTSTORE             hdr;
    DWORD                           dwStoreProvFlags;
    PWINECRYPT_CERTSTORE            memStore;
    HCERTSTOREPROV                  hStoreProv;
    PFN_CERT_STORE_PROV_CLOSE       provCloseStore;
    PFN_CERT_STORE_PROV_WRITE_CERT  provWriteCert;
    PFN_CERT_STORE_PROV_DELETE_CERT provDeleteCert;
    PFN_CERT_STORE_PROV_CONTROL     provControl;
} WINE_PROVIDERSTORE, *PWINE_PROVIDERSTORE;

/* Internal version of CertGetCertificateContextProperty that gets properties
 * directly from the context (or the context it's linked to, depending on its
 * type.) Doesn't handle special-case properties, since they are handled by
 * CertGetCertificateContextProperty, and are particular to the store in which
 * the property exists (which is separate from the context.)
 */
static BOOL WINAPI CertContext_GetProperty(PWINE_CERT_CONTEXT context,
  DWORD dwPropId, void *pvData, DWORD *pcbData);

/* Internal version of CertSetCertificateContextProperty that sets properties
 * directly on the context (or the context it's linked to, depending on its
 * type.) Doesn't handle special cases, since they're handled by
 * CertSetCertificateContextProperty anyway.
 */
static BOOL WINAPI CertContext_SetProperty(PWINE_CERT_CONTEXT context,
 DWORD dwPropId, DWORD dwFlags, const void *pvData);

static void CRYPT_InitStore(WINECRYPT_CERTSTORE *store, HCRYPTPROV hCryptProv,
 DWORD dwFlags, CertStoreType type)
{
    store->ref = 1;
    store->dwMagic = WINE_CRYPTCERTSTORE_MAGIC;
    store->type = type;
    if (!hCryptProv)
    {
        hCryptProv = CRYPT_GetDefaultProvider();
        dwFlags |= CERT_STORE_NO_CRYPT_RELEASE_FLAG;
    }
    store->cryptProv = hCryptProv;
    store->dwOpenFlags = dwFlags;
}

/* Initializes the reference ref to point to context, and increments context's
 * reference count.  Also sets the hCertStore member of the reference to store.
 */
static void CRYPT_InitCertRef(PWINE_CERT_CONTEXT_LINK ref,
 PWINE_CERT_CONTEXT context, HCERTSTORE store)
{
    TRACE("(%p, %p)\n", ref, context);
    memcpy(&ref->cert, context, sizeof(ref->cert));
    ref->ref = 1;
    ref->type = ContextTypeLink;
    ref->linked = context;
    InterlockedIncrement(&context->ref);
    TRACE("%p's ref count is %ld\n", context, context->ref);
    ref->cert.hCertStore = store;
}

static BOOL CRYPT_MemAddCert(PWINECRYPT_CERTSTORE store,
 PWINE_CERT_CONTEXT cert, PWINE_CERT_CONTEXT toReplace,
 PCCERT_CONTEXT *ppStoreContext)
{
    WINE_MEMSTORE *ms = (WINE_MEMSTORE *)store;
    PWINE_CERT_LIST_ENTRY entry = CryptMemAlloc(sizeof(WINE_CERT_LIST_ENTRY));
    BOOL ret;

    TRACE("(%p, %p, %p, %p)\n", store, cert, toReplace, ppStoreContext);

    if (entry)
    {
        PWINE_CERT_LIST_ENTRY existing = (PWINE_CERT_LIST_ENTRY)toReplace;

        TRACE("adding %p\n", entry);
        CRYPT_InitCertRef(&entry->cert, (PWINE_CERT_CONTEXT)cert, store);
        EnterCriticalSection(&ms->cs);
        if (existing)
        {
            entry->entry.prev = existing->entry.prev;
            entry->entry.next = existing->entry.next;
            entry->entry.prev->next = &entry->entry;
            entry->entry.next->prev = &entry->entry;
            existing->entry.prev = existing->entry.next = &existing->entry;
            CertFreeCertificateContext((PCCERT_CONTEXT)existing);
        }
        else
            list_add_tail(&ms->certs, &entry->entry);
        LeaveCriticalSection(&ms->cs);
        if (ppStoreContext)
            *ppStoreContext =
             CertDuplicateCertificateContext((PCCERT_CONTEXT)entry);
        ret = TRUE;
    }
    else
        ret = FALSE;
    TRACE("returning %d\n", ret);
    return ret;
}

static PWINE_CERT_CONTEXT CRYPT_MemEnumCert(PWINECRYPT_CERTSTORE store,
 PWINE_CERT_CONTEXT pPrev)
{
    WINE_MEMSTORE *ms = (WINE_MEMSTORE *)store;
    PWINE_CERT_LIST_ENTRY prevEntry = (PWINE_CERT_LIST_ENTRY)pPrev;
    PWINE_CERT_CONTEXT ret;
    struct list *listNext;

    TRACE("(%p, %p)\n", store, pPrev);
    EnterCriticalSection(&ms->cs);
    if (prevEntry)
    {
        listNext = list_next(&ms->certs, &prevEntry->entry);
        CertFreeCertificateContext((PCCERT_CONTEXT)pPrev);
    }
    else
        listNext = list_next(&ms->certs, &ms->certs);
    if (listNext)
        ret = (PWINE_CERT_CONTEXT)CertDuplicateCertificateContext(
         (PCCERT_CONTEXT)LIST_ENTRY(listNext, WINE_CERT_LIST_ENTRY, entry));
    else
    {
        SetLastError(CRYPT_E_NOT_FOUND);
        ret = NULL;
    }
    LeaveCriticalSection(&ms->cs);

    TRACE("returning %p\n", ret);
    return ret;
}

static BOOL WINAPI CRYPT_MemDeleteCert(HCERTSTORE hCertStore,
 PCCERT_CONTEXT pCertContext, DWORD dwFlags)
{
    WINE_MEMSTORE *store = (WINE_MEMSTORE *)hCertStore;
    PWINE_CERT_LIST_ENTRY cert = (PWINE_CERT_LIST_ENTRY)pCertContext;
    BOOL ret;

    /* The passed-in context is itself a list entry, so just remove it. */
    EnterCriticalSection(&store->cs);
    list_remove(&cert->entry);
    ret = CertFreeCertificateContext(pCertContext);
    LeaveCriticalSection(&store->cs);
    return ret;
}

static void CRYPT_MemEmptyStore(PWINE_MEMSTORE store)
{
    PWINE_CERT_LIST_ENTRY cert, next;

    EnterCriticalSection(&store->cs);
    LIST_FOR_EACH_ENTRY_SAFE(cert, next, &store->certs, WINE_CERT_LIST_ENTRY,
     entry)
    {
        TRACE("removing %p\n", cert);
        list_remove(&cert->entry);
        CertFreeCertificateContext((PCCERT_CONTEXT)cert);
    }
    LeaveCriticalSection(&store->cs);
}

static void WINAPI CRYPT_MemCloseStore(HCERTSTORE hCertStore, DWORD dwFlags)
{
    WINE_MEMSTORE *store = (WINE_MEMSTORE *)hCertStore;

    TRACE("(%p, %08lx)\n", store, dwFlags);
    if (dwFlags)
        FIXME("Unimplemented flags: %08lx\n", dwFlags);

    CRYPT_MemEmptyStore(store);
    DeleteCriticalSection(&store->cs);
    CryptMemFree(store);
}

static WINECRYPT_CERTSTORE *CRYPT_MemOpenStore(HCRYPTPROV hCryptProv,
 DWORD dwFlags, const void *pvPara)
{
    PWINE_MEMSTORE store;

    TRACE("(%ld, %08lx, %p)\n", hCryptProv, dwFlags, pvPara);

    if (dwFlags & CERT_STORE_DELETE_FLAG)
    {
        SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
        store = NULL;
    }
    else
    {
        store = CryptMemAlloc(sizeof(WINE_MEMSTORE));
        if (store)
        {
            memset(store, 0, sizeof(WINE_MEMSTORE));
            CRYPT_InitStore(&store->hdr, hCryptProv, dwFlags, StoreTypeMem);
            store->hdr.closeStore    = CRYPT_MemCloseStore;
            store->hdr.addCert       = CRYPT_MemAddCert;
            store->hdr.enumCert      = CRYPT_MemEnumCert;
            store->hdr.deleteCert    = CRYPT_MemDeleteCert;
            store->hdr.control       = NULL;
            InitializeCriticalSection(&store->cs);
            list_init(&store->certs);
        }
    }
    return (PWINECRYPT_CERTSTORE)store;
}

static PWINE_COLLECTION_CERT_CONTEXT CRYPT_CollectionCreateContextFromChild(
 PWINE_COLLECTIONSTORE store, PWINE_STORE_LIST_ENTRY storeEntry,
 PWINE_CERT_CONTEXT child)
{
    PWINE_COLLECTION_CERT_CONTEXT ret =
     CryptMemAlloc(sizeof(WINE_COLLECTION_CERT_CONTEXT));

    if (ret)
    {
        CRYPT_InitCertRef((PWINE_CERT_CONTEXT_LINK)ret, child, store);
        /* The child has already been addref'd, and CRYPT_InitCertRef does
         * again, so free child once to get the ref count right.  (Not doing so
         * will leak memory if the caller calls CertFreeCertificateContext
         * rather than CertEnumCertificatesInStore.)
         */
        CertFreeCertificateContext((PCCERT_CONTEXT)child);
        ret->storeEntry = storeEntry;
    }
    else
        CertFreeCertificateContext((PCCERT_CONTEXT)child);
    return ret;
}

static BOOL CRYPT_CollectionAddCert(PWINECRYPT_CERTSTORE store,
 PWINE_CERT_CONTEXT cert, PWINE_CERT_CONTEXT toReplace,
 PCCERT_CONTEXT *ppStoreContext)
{
    BOOL ret;
    PCCERT_CONTEXT childContext = NULL;
    PWINE_STORE_LIST_ENTRY storeEntry = NULL;

    TRACE("(%p, %p, %p, %p)\n", store, cert, toReplace, ppStoreContext);

    ret = FALSE;
    if (toReplace)
    {
        PWINE_COLLECTION_CERT_CONTEXT existing =
         (PWINE_COLLECTION_CERT_CONTEXT)toReplace;

        storeEntry = existing->storeEntry;
        ret = storeEntry->store->addCert(storeEntry->store, cert,
         existing->cert.linked, &childContext);
    }
    else
    {
        PWINE_COLLECTIONSTORE cs = (PWINE_COLLECTIONSTORE)store;
        PWINE_STORE_LIST_ENTRY entry, next;

        EnterCriticalSection(&cs->cs);
        LIST_FOR_EACH_ENTRY_SAFE(entry, next, &cs->stores,
         WINE_STORE_LIST_ENTRY, entry)
        {
            if (entry->dwUpdateFlags & CERT_PHYSICAL_STORE_ADD_ENABLE_FLAG)
            {
                storeEntry = entry;
                ret = entry->store->addCert(entry->store, cert, NULL,
                 &childContext);
                break;
            }
        }
        LeaveCriticalSection(&cs->cs);
        if (!storeEntry)
            SetLastError(E_ACCESSDENIED);
    }
    if (ppStoreContext && childContext)
    {
        *ppStoreContext =
         (PCCERT_CONTEXT)CRYPT_CollectionCreateContextFromChild(
         (PWINE_COLLECTIONSTORE)store, storeEntry,
         (PWINE_CERT_CONTEXT)childContext);
    }
    CertFreeCertificateContext(childContext);
    return ret;
}

static void WINAPI CRYPT_CollectionCloseStore(HCERTSTORE store, DWORD dwFlags)
{
    PWINE_COLLECTIONSTORE cs = (PWINE_COLLECTIONSTORE)store;
    PWINE_STORE_LIST_ENTRY entry, next;

    TRACE("(%p, %08lx)\n", store, dwFlags);

    LIST_FOR_EACH_ENTRY_SAFE(entry, next, &cs->stores, WINE_STORE_LIST_ENTRY,
     entry)
    {
        TRACE("closing %p\n", entry);
        CertCloseStore((HCERTSTORE)entry->store, dwFlags);
        CryptMemFree(entry);
    }
    DeleteCriticalSection(&cs->cs);
    CryptMemFree(cs);
}

/* Advances a collection enumeration by one cert, if possible, where advancing
 * means:
 * - calling the current store's enumeration function once, and returning
 *   the enumerated cert if one is returned
 * - moving to the next store if the current store has no more items, and
 *   recursively calling itself to get the next item.
 * Returns NULL if the collection contains no more items or on error.
 * Assumes the collection store's lock is held.
 */
static PWINE_COLLECTION_CERT_CONTEXT CRYPT_CollectionAdvanceEnum(
 PWINE_COLLECTIONSTORE store, PWINE_STORE_LIST_ENTRY storeEntry,
 PWINE_COLLECTION_CERT_CONTEXT pPrev)
{
    PWINE_COLLECTION_CERT_CONTEXT ret;
    PWINE_CERT_CONTEXT child;
    struct list *storeNext = list_next(&store->stores, &storeEntry->entry);

    TRACE("(%p, %p, %p)\n", store, storeEntry, pPrev);

    if (pPrev)
    {
        /* Ref-counting funny business: "duplicate" (addref) the child, because
         * the CertFreeCertificateContext(pPrev) below can cause the ref count
         * to become negative.  See comment in
         * CRYPT_CollectionCreateContextFromChild as well.
         */
        child = ((PWINE_COLLECTION_CERT_CONTEXT)pPrev)->cert.linked;
        CertDuplicateCertificateContext((PCCERT_CONTEXT)child);
        child = storeEntry->store->enumCert((HCERTSTORE)storeEntry->store,
         child);
        CertFreeCertificateContext((PCCERT_CONTEXT)pPrev);
        pPrev = NULL;
    }
    else
        child = storeEntry->store->enumCert((HCERTSTORE)storeEntry->store,
         NULL);
    if (child)
        ret = CRYPT_CollectionCreateContextFromChild(store, storeEntry, child);
    else
    {
        if (storeNext)
        {
            storeEntry = LIST_ENTRY(storeNext, WINE_STORE_LIST_ENTRY, entry);
            ret = CRYPT_CollectionAdvanceEnum(store, storeEntry, NULL);
        }
        else
        {
            SetLastError(CRYPT_E_NOT_FOUND);
            ret = NULL;
        }
    }
    TRACE("returning %p\n", ret);
    return ret;
}

static PWINE_CERT_CONTEXT CRYPT_CollectionEnumCert(PWINECRYPT_CERTSTORE store,
 PWINE_CERT_CONTEXT pPrev)
{
    PWINE_COLLECTIONSTORE cs = (PWINE_COLLECTIONSTORE)store;
    PWINE_COLLECTION_CERT_CONTEXT prevEntry =
     (PWINE_COLLECTION_CERT_CONTEXT)pPrev, ret;

    TRACE("(%p, %p)\n", store, pPrev);

    if (prevEntry)
    {
        EnterCriticalSection(&cs->cs);
        ret = CRYPT_CollectionAdvanceEnum(cs, prevEntry->storeEntry, prevEntry);
        LeaveCriticalSection(&cs->cs);
    }
    else
    {
        EnterCriticalSection(&cs->cs);
        if (!list_empty(&cs->stores))
        {
            PWINE_STORE_LIST_ENTRY storeEntry;

            storeEntry = LIST_ENTRY(cs->stores.next, WINE_STORE_LIST_ENTRY,
             entry);
            ret = CRYPT_CollectionAdvanceEnum(cs, storeEntry, NULL);
        }
        else
        {
            SetLastError(CRYPT_E_NOT_FOUND);
            ret = NULL;
        }
        LeaveCriticalSection(&cs->cs);
    }
    TRACE("returning %p\n", ret);
    return (PWINE_CERT_CONTEXT)ret;
}

static BOOL WINAPI CRYPT_CollectionDeleteCert(HCERTSTORE hCertStore,
 PCCERT_CONTEXT pCertContext, DWORD dwFlags)
{
    PWINE_COLLECTION_CERT_CONTEXT context =
     (PWINE_COLLECTION_CERT_CONTEXT)pCertContext;
    BOOL ret;

    TRACE("(%p, %p, %08lx)\n", hCertStore, pCertContext, dwFlags);

    ret = CertDeleteCertificateFromStore((PCCERT_CONTEXT)context->cert.linked);
    return ret;
}

static WINECRYPT_CERTSTORE *CRYPT_CollectionOpenStore(HCRYPTPROV hCryptProv,
 DWORD dwFlags, const void *pvPara)
{
    PWINE_COLLECTIONSTORE store;

    if (dwFlags & CERT_STORE_DELETE_FLAG)
    {
        SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
        store = NULL;
    }
    else
    {
        store = CryptMemAlloc(sizeof(WINE_COLLECTIONSTORE));
        if (store)
        {
            memset(store, 0, sizeof(WINE_COLLECTIONSTORE));
            CRYPT_InitStore(&store->hdr, hCryptProv, dwFlags,
             StoreTypeCollection);
            store->hdr.closeStore    = CRYPT_CollectionCloseStore;
            store->hdr.addCert       = CRYPT_CollectionAddCert;
            store->hdr.enumCert      = CRYPT_CollectionEnumCert;
            store->hdr.deleteCert    = CRYPT_CollectionDeleteCert;
            InitializeCriticalSection(&store->cs);
            list_init(&store->stores);
        }
    }
    return (PWINECRYPT_CERTSTORE)store;
}

static void WINAPI CRYPT_ProvCloseStore(HCERTSTORE hCertStore, DWORD dwFlags)
{
    PWINE_PROVIDERSTORE store = (PWINE_PROVIDERSTORE)hCertStore;

    TRACE("(%p, %08lx)\n", store, dwFlags);

    if (store->provCloseStore)
        store->provCloseStore(store->hStoreProv, dwFlags);
    if (!(store->dwStoreProvFlags & CERT_STORE_PROV_EXTERNAL_FLAG))
        CertCloseStore(store->memStore, dwFlags);
    CryptMemFree(store);
}

static BOOL CRYPT_ProvAddCert(PWINECRYPT_CERTSTORE store,
 PWINE_CERT_CONTEXT cert, PWINE_CERT_CONTEXT toReplace,
 PCCERT_CONTEXT *ppStoreContext)
{
    PWINE_PROVIDERSTORE ps = (PWINE_PROVIDERSTORE)store;
    BOOL ret;

    TRACE("(%p, %p, %p, %p)\n", store, cert, toReplace, ppStoreContext);

    if (toReplace)
        ret = ps->memStore->addCert(ps->memStore, cert, toReplace,
         ppStoreContext);
    else
    {
        if (ps->hdr.dwOpenFlags & CERT_STORE_READONLY_FLAG)
        {
            SetLastError(ERROR_ACCESS_DENIED);
            ret = FALSE;
        }
        else
        {
            ret = TRUE;
            if (ps->provWriteCert)
                ret = ps->provWriteCert(ps->hStoreProv, (PCCERT_CONTEXT)cert,
                 CERT_STORE_PROV_WRITE_ADD_FLAG);
            if (ret)
                ret = ps->memStore->addCert(ps->memStore, cert, NULL,
                 ppStoreContext);
        }
    }
    /* dirty trick: replace the returned context's hCertStore with
     * store.
     */
    if (ppStoreContext)
        (*(PCERT_CONTEXT *)ppStoreContext)->hCertStore = store;
    return ret;
}

static PWINE_CERT_CONTEXT CRYPT_ProvEnumCert(PWINECRYPT_CERTSTORE store,
 PWINE_CERT_CONTEXT pPrev)
{
    PWINE_PROVIDERSTORE ps = (PWINE_PROVIDERSTORE)store;
    PWINE_CERT_CONTEXT ret;

    ret = ps->memStore->enumCert(ps->memStore, pPrev);
    if (ret)
    {
        /* same dirty trick: replace the returned context's hCertStore with
         * store.
         */
        ret->cert.hCertStore = store;
    }
    return ret;
}

static BOOL WINAPI CRYPT_ProvDeleteCert(HCERTSTORE hCertStore,
 PCCERT_CONTEXT cert, DWORD dwFlags)
{
    PWINE_PROVIDERSTORE store = (PWINE_PROVIDERSTORE)hCertStore;
    BOOL ret = TRUE;

    TRACE("(%p, %p, %08lx)\n", hCertStore, cert, dwFlags);

    if (store->provDeleteCert)
        ret = store->provDeleteCert(store->hStoreProv, cert, dwFlags);
    if (ret)
        ret = store->memStore->deleteCert(store->memStore, cert, dwFlags);
    return ret;
}

static BOOL WINAPI CRYPT_ProvControl(HCERTSTORE hCertStore, DWORD dwFlags,
 DWORD dwCtrlType, void const *pvCtrlPara)
{
    PWINE_PROVIDERSTORE store = (PWINE_PROVIDERSTORE)hCertStore;
    BOOL ret = TRUE;

    TRACE("(%p, %08lx, %ld, %p)\n", hCertStore, dwFlags, dwCtrlType,
     pvCtrlPara);

    if (store->provControl)
        ret = store->provControl(store->hStoreProv, dwFlags, dwCtrlType,
         pvCtrlPara);
    return ret;
}

static PWINECRYPT_CERTSTORE CRYPT_ProvCreateStore(HCRYPTPROV hCryptProv,
 DWORD dwFlags, PWINECRYPT_CERTSTORE memStore, PCERT_STORE_PROV_INFO pProvInfo)
{
    PWINE_PROVIDERSTORE ret = (PWINE_PROVIDERSTORE)CryptMemAlloc(
     sizeof(WINE_PROVIDERSTORE));

    if (ret)
    {
        CRYPT_InitStore(&ret->hdr, hCryptProv, dwFlags,
         StoreTypeProvider);
        ret->dwStoreProvFlags = pProvInfo->dwStoreProvFlags;
        if (ret->dwStoreProvFlags & CERT_STORE_PROV_EXTERNAL_FLAG)
        {
            CertCloseStore(memStore, 0);
            ret->memStore = NULL;
        }
        else
            ret->memStore = memStore;
        ret->hStoreProv = pProvInfo->hStoreProv;
        ret->hdr.closeStore = CRYPT_ProvCloseStore;
        ret->hdr.addCert = CRYPT_ProvAddCert;
        ret->hdr.enumCert = CRYPT_ProvEnumCert;
        ret->hdr.deleteCert = CRYPT_ProvDeleteCert;
        ret->hdr.control = CRYPT_ProvControl;
        if (pProvInfo->cStoreProvFunc > CERT_STORE_PROV_CLOSE_FUNC)
            ret->provCloseStore =
             pProvInfo->rgpvStoreProvFunc[CERT_STORE_PROV_CLOSE_FUNC];
        else
            ret->provCloseStore = NULL;
        if (pProvInfo->cStoreProvFunc >
         CERT_STORE_PROV_WRITE_CERT_FUNC)
            ret->provWriteCert = pProvInfo->rgpvStoreProvFunc[
             CERT_STORE_PROV_WRITE_CERT_FUNC];
        else
            ret->provWriteCert = NULL;
        if (pProvInfo->cStoreProvFunc >
         CERT_STORE_PROV_DELETE_CERT_FUNC)
            ret->provDeleteCert = pProvInfo->rgpvStoreProvFunc[
             CERT_STORE_PROV_DELETE_CERT_FUNC];
        else
            ret->provDeleteCert = NULL;
        if (pProvInfo->cStoreProvFunc >
         CERT_STORE_PROV_CONTROL_FUNC)
            ret->provControl = pProvInfo->rgpvStoreProvFunc[
             CERT_STORE_PROV_CONTROL_FUNC];
        else
            ret->provControl = NULL;
    }
    return (PWINECRYPT_CERTSTORE)ret;
}

static PWINECRYPT_CERTSTORE CRYPT_ProvOpenStore(LPCSTR lpszStoreProvider,
 DWORD dwEncodingType, HCRYPTPROV hCryptProv, DWORD dwFlags, const void *pvPara)
{
    static HCRYPTOIDFUNCSET set = NULL;
    PFN_CERT_DLL_OPEN_STORE_PROV_FUNC provOpenFunc;
    HCRYPTOIDFUNCADDR hFunc;
    PWINECRYPT_CERTSTORE ret = NULL;

    if (!set)
        set = CryptInitOIDFunctionSet(CRYPT_OID_OPEN_STORE_PROV_FUNC, 0);
    CryptGetOIDFunctionAddress(set, dwEncodingType, lpszStoreProvider, 0,
     (void **)&provOpenFunc, &hFunc);
    if (provOpenFunc)
    {
        CERT_STORE_PROV_INFO provInfo = { 0 };

        provInfo.cbSize = sizeof(provInfo);
        if (dwFlags & CERT_STORE_DELETE_FLAG)
            provOpenFunc(lpszStoreProvider, dwEncodingType, hCryptProv,
             dwFlags, pvPara, NULL, &provInfo);
        else
        {
            HCERTSTORE memStore;

            memStore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0,
             CERT_STORE_CREATE_NEW_FLAG, NULL);
            if (memStore)
            {
                if (provOpenFunc(lpszStoreProvider, dwEncodingType, hCryptProv,
                 dwFlags, pvPara, memStore, &provInfo))
                    ret = CRYPT_ProvCreateStore(hCryptProv, dwFlags, memStore,
                     &provInfo);
                else
                    CertCloseStore(memStore, 0);
            }
        }
        CryptFreeOIDFunctionAddress(hFunc, 0);
    }
    else
        SetLastError(ERROR_FILE_NOT_FOUND);
    return ret;
}

static void CRYPT_HashToStr(LPBYTE hash, LPWSTR asciiHash)
{
    static const WCHAR fmt[] = { '%','0','2','X',0 };
    DWORD i;

    assert(hash);
    assert(asciiHash);

    for (i = 0; i < 20; i++)
        wsprintfW(asciiHash + i * 2, fmt, hash[i]);
}

static const WCHAR CertsW[] = { 'C','e','r','t','i','f','i','c','a','t','e','s',
 0 };
static const WCHAR CRLsW[] = { 'C','R','L','s',0 };
static const WCHAR CTLsW[] = { 'C','T','L','s',0 };
static const WCHAR BlobW[] = { 'B','l','o','b',0 };

static void CRYPT_RegReadSerializedFromReg(PWINE_REGSTOREINFO store, HKEY key,
 DWORD contextType)
{
    LONG rc;
    DWORD index = 0;
    WCHAR subKeyName[MAX_PATH];

    do {
        DWORD size = sizeof(subKeyName) / sizeof(WCHAR);

        rc = RegEnumKeyExW(key, index++, subKeyName, &size, NULL, NULL, NULL,
         NULL);
        if (!rc)
        {
            HKEY subKey;

            rc = RegOpenKeyExW(key, subKeyName, 0, KEY_READ, &subKey);
            if (!rc)
            {
                LPBYTE buf = NULL;

                size = 0;
                rc = RegQueryValueExW(subKey, BlobW, NULL, NULL, NULL, &size);
                if (!rc)
                    buf = CryptMemAlloc(size);
                if (buf)
                {
                    rc = RegQueryValueExW(subKey, BlobW, NULL, NULL, buf,
                     &size);
                    if (!rc)
                    {
                        const void *context;
                        DWORD addedType;

                        TRACE("Adding cert with hash %s\n",
                         debugstr_w(subKeyName));
                        context = CRYPT_ReadSerializedElement(buf, size,
                         contextType, &addedType);
                        if (context)
                        {
                            const WINE_CONTEXT_INTERFACE *contextInterface;
                            BYTE hash[20];

                            switch (addedType)
                            {
                            case CERT_STORE_CERTIFICATE_CONTEXT:
                                contextInterface = &gCertInterface;
                                break;
                            case CERT_STORE_CRL_CONTEXT:
                                contextInterface = &gCRLInterface;
                                break;
                            case CERT_STORE_CTL_CONTEXT:
                                contextInterface = &gCTLInterface;
                                break;
                            default:
                                contextInterface = NULL;
                            }
                            if (contextInterface)
                            {
                                size = sizeof(hash);
                                if (contextInterface->getProp(context,
                                 CERT_HASH_PROP_ID, hash, &size))
                                {
                                    WCHAR asciiHash[20 * 2 + 1];

                                    CRYPT_HashToStr(hash, asciiHash);
                                    TRACE("comparing %s\n",
                                     debugstr_w(asciiHash));
                                    TRACE("with %s\n", debugstr_w(subKeyName));
                                    if (!lstrcmpW(asciiHash, subKeyName))
                                    {
                                        TRACE("hash matches, adding\n");
                                        contextInterface->addContextToStore(
                                         store->memStore, context,
                                         CERT_STORE_ADD_REPLACE_EXISTING, NULL);
                                    }
                                    else
                                        TRACE("hash doesn't match, ignoring\n");
                                }
                                contextInterface->free(context);
                            }
                        }
                    }
                    CryptMemFree(buf);
                }
                RegCloseKey(subKey);
            }
            /* Ignore intermediate errors, continue enumerating */
            rc = ERROR_SUCCESS;
        }
    } while (!rc);
}

static void CRYPT_RegReadFromReg(PWINE_REGSTOREINFO store)
{
    static const WCHAR *subKeys[] = { CertsW, CRLsW, CTLsW };
    static const DWORD contextFlags[] = { CERT_STORE_CERTIFICATE_CONTEXT_FLAG,
     CERT_STORE_CRL_CONTEXT_FLAG, CERT_STORE_CTL_CONTEXT_FLAG };
    DWORD i;

    for (i = 0; i < sizeof(subKeys) / sizeof(subKeys[0]); i++)
    {
        HKEY key;
        LONG rc;

        rc = RegCreateKeyExW(store->key, subKeys[i], 0, NULL, 0, KEY_READ, NULL,
         &key, NULL);
        if (!rc)
        {
            CRYPT_RegReadSerializedFromReg(store, key, contextFlags[i]);
            RegCloseKey(key);
        }
    }
}

/* Hash is assumed to be 20 bytes in length (a SHA-1 hash) */
static BOOL CRYPT_WriteSerializedToReg(HKEY key, LPBYTE hash, LPBYTE buf,
 DWORD len)
{
    WCHAR asciiHash[20 * 2 + 1];
    LONG rc;
    HKEY subKey;
    BOOL ret;

    CRYPT_HashToStr(hash, asciiHash);
    rc = RegCreateKeyExW(key, asciiHash, 0, NULL, 0, KEY_ALL_ACCESS, NULL,
     &subKey, NULL);
    if (!rc)
    {
        rc = RegSetValueExW(subKey, BlobW, 0, REG_BINARY, buf, len);
        RegCloseKey(subKey);
    }
    if (!rc)
        ret = TRUE;
    else
    {
        SetLastError(rc);
        ret = FALSE;
    }
    return ret;
}

static BOOL CRYPT_SerializeContextsToReg(HKEY key,
 const WINE_CONTEXT_INTERFACE *contextInterface, HCERTSTORE memStore)
{
    const void *context = NULL;
    BOOL ret;

    do {
        context = contextInterface->enumContextsInStore(memStore, context);
        if (context)
        {
            BYTE hash[20];
            DWORD hashSize = sizeof(hash);

            ret = contextInterface->getProp(context, CERT_HASH_PROP_ID, hash,
             &hashSize);
            if (ret)
            {
                DWORD size = 0;
                LPBYTE buf = NULL;

                ret = contextInterface->serialize(context, 0, NULL, &size);
                if (size)
                    buf = CryptMemAlloc(size);
                if (buf)
                {
                    ret = contextInterface->serialize(context, 0, buf, &size);
                    if (ret)
                        ret = CRYPT_WriteSerializedToReg(key, hash, buf, size);
                }
                CryptMemFree(buf);
            }
        }
        else
            ret = TRUE;
    } while (ret && context != NULL);
    if (context)
        contextInterface->free(context);
    return ret;
}

static BOOL CRYPT_RegWriteToReg(PWINE_REGSTOREINFO store)
{
    static const WCHAR *subKeys[] = { CertsW, CRLsW, CTLsW };
    static const WINE_CONTEXT_INTERFACE *interfaces[] = { &gCertInterface,
     &gCRLInterface, &gCTLInterface };
    struct list *listToDelete[] = { &store->certsToDelete, NULL, NULL };
    BOOL ret = TRUE;
    DWORD i;

    for (i = 0; ret && i < sizeof(subKeys) / sizeof(subKeys[0]); i++)
    {
        HKEY key;
        LONG rc = RegCreateKeyExW(store->key, subKeys[i], 0, NULL, 0,
         KEY_ALL_ACCESS, NULL, &key, NULL);

        if (!rc)
        {
            if (listToDelete[i])
            {
                PWINE_HASH_TO_DELETE toDelete, next;
                WCHAR asciiHash[20 * 2 + 1];

                EnterCriticalSection(&store->cs);
                LIST_FOR_EACH_ENTRY_SAFE(toDelete, next, listToDelete[i],
                 WINE_HASH_TO_DELETE, entry)
                {
                    LONG rc;

                    CRYPT_HashToStr(toDelete->hash, asciiHash);
                    TRACE("Removing %s\n", debugstr_w(asciiHash));
                    rc = RegDeleteKeyW(key, asciiHash);
                    if (rc != ERROR_SUCCESS && rc != ERROR_FILE_NOT_FOUND)
                    {
                        SetLastError(rc);
                        ret = FALSE;
                    }
                    list_remove(&toDelete->entry);
                    CryptMemFree(toDelete);
                }
                LeaveCriticalSection(&store->cs);
            }
            ret = CRYPT_SerializeContextsToReg(key, interfaces[i],
             store->memStore);
            RegCloseKey(key);
        }
        else
        {
            SetLastError(rc);
            ret = FALSE;
        }
    }
    return ret;
}

/* If force is true or the registry store is dirty, writes the contents of the
 * store to the registry.
 */
static BOOL CRYPT_RegFlushStore(PWINE_REGSTOREINFO store, BOOL force)
{
    BOOL ret;

    TRACE("(%p, %d)\n", store, force);

    if (store->dirty || force)
        ret = CRYPT_RegWriteToReg(store);
    else
        ret = TRUE;
    return ret;
}

static void WINAPI CRYPT_RegCloseStore(HCERTSTORE hCertStore, DWORD dwFlags)
{
    PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;

    TRACE("(%p, %08lx)\n", store, dwFlags);
    if (dwFlags)
        FIXME("Unimplemented flags: %08lx\n", dwFlags);

    CRYPT_RegFlushStore(store, FALSE);
    RegCloseKey(store->key);
    DeleteCriticalSection(&store->cs);
    CryptMemFree(store);
}

static BOOL WINAPI CRYPT_RegWriteCert(HCERTSTORE hCertStore,
 PCCERT_CONTEXT cert, DWORD dwFlags)
{
    PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;
    BOOL ret;

    TRACE("(%p, %p, %ld)\n", hCertStore, cert, dwFlags);

    if (dwFlags & CERT_STORE_PROV_WRITE_ADD_FLAG)
    {
        store->dirty = TRUE;
        ret = TRUE;
    }
    else
        ret = FALSE;
    return ret;
}

static BOOL WINAPI CRYPT_RegDeleteCert(HCERTSTORE hCertStore,
 PCCERT_CONTEXT pCertContext, DWORD dwFlags)
{
    PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;
    BOOL ret;

    TRACE("(%p, %p, %08lx)\n", store, pCertContext, dwFlags);

    if (store->dwOpenFlags & CERT_STORE_READONLY_FLAG)
    {
        SetLastError(ERROR_ACCESS_DENIED);
        ret = FALSE;
    }
    else
    {
        PWINE_HASH_TO_DELETE toDelete =
         CryptMemAlloc(sizeof(WINE_HASH_TO_DELETE));

        if (toDelete)
        {
            DWORD size = sizeof(toDelete->hash);

            ret = CertGetCertificateContextProperty(pCertContext,
             CERT_HASH_PROP_ID, toDelete->hash, &size);
            if (ret)
            {
                EnterCriticalSection(&store->cs);
                list_add_tail(&store->certsToDelete, &toDelete->entry);
                LeaveCriticalSection(&store->cs);
            }
            else
            {
                CryptMemFree(toDelete);
                ret = FALSE;
            }
        }
        else
            ret = FALSE;
        if (ret)
            store->dirty = TRUE;
    }
    return ret;
}

static BOOL WINAPI CRYPT_RegControl(HCERTSTORE hCertStore, DWORD dwFlags,
 DWORD dwCtrlType, void const *pvCtrlPara)
{
    PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;
    BOOL ret;

    TRACE("(%p, %08lx, %ld, %p)\n", hCertStore, dwFlags, dwCtrlType,
     pvCtrlPara);

    switch (dwCtrlType)
    {
    case CERT_STORE_CTRL_RESYNC:
        CRYPT_RegFlushStore(store, FALSE);
        CRYPT_MemEmptyStore((PWINE_MEMSTORE)store->memStore);
        CRYPT_RegReadFromReg(store);
        ret = TRUE;
        break;
    case CERT_STORE_CTRL_COMMIT:
        ret = CRYPT_RegFlushStore(store,
         dwFlags & CERT_STORE_CTRL_COMMIT_FORCE_FLAG);
        break;
    default:
        FIXME("%ld: stub\n", dwCtrlType);
        ret = FALSE;
    }
    return ret;
}

/* Copied from shlwapi's SHDeleteKeyW, and reformatted to match this file. */
static DWORD CRYPT_RecurseDeleteKey(HKEY hKey, LPCWSTR lpszSubKey)
{
    DWORD dwRet, dwKeyCount = 0, dwMaxSubkeyLen = 0, dwSize, i;
    WCHAR szNameBuf[MAX_PATH], *lpszName = szNameBuf;
    HKEY hSubKey = 0;

    TRACE("(hkey=%p,%s)\n", hKey, debugstr_w(lpszSubKey));

    dwRet = RegOpenKeyExW(hKey, lpszSubKey, 0, KEY_READ, &hSubKey);
    if (!dwRet)
    {
        /* Find how many subkeys there are */
        dwRet = RegQueryInfoKeyW(hSubKey, NULL, NULL, NULL, &dwKeyCount,
         &dwMaxSubkeyLen, NULL, NULL, NULL, NULL, NULL, NULL);
        if (!dwRet)
        {
            dwMaxSubkeyLen++;
            if (dwMaxSubkeyLen > sizeof(szNameBuf)/sizeof(WCHAR))
            {
                /* Name too big: alloc a buffer for it */
                lpszName = CryptMemAlloc(dwMaxSubkeyLen*sizeof(WCHAR));
            }

            if (!lpszName)
                dwRet = ERROR_NOT_ENOUGH_MEMORY;
            else
            {
                /* Recursively delete all the subkeys */
                for (i = 0; i < dwKeyCount && !dwRet; i++)
                {
                    dwSize = dwMaxSubkeyLen;
                    dwRet = RegEnumKeyExW(hSubKey, i, lpszName, &dwSize, NULL,
                     NULL, NULL, NULL);
                    if (!dwRet)
                        dwRet = CRYPT_RecurseDeleteKey(hSubKey, lpszName);
                }

                if (lpszName != szNameBuf)
                {
                    /* Free buffer if allocated */
                    CryptMemFree(lpszName);
                }
            }
        }

        RegCloseKey(hSubKey);
        if (!dwRet)
            dwRet = RegDeleteKeyW(hKey, lpszSubKey);
    }
    return dwRet;
}

static void *regProvFuncs[] = {
    CRYPT_RegCloseStore,
    NULL, /* CERT_STORE_PROV_READ_CERT_FUNC */
    CRYPT_RegWriteCert,
    CRYPT_RegDeleteCert,
    NULL, /* CERT_STORE_PROV_SET_CERT_PROPERTY_FUNC */
    NULL, /* CERT_STORE_PROV_READ_CRL_FUNC */
    NULL, /* CERT_STORE_PROV_WRITE_CRL_FUNC */
    NULL, /* CERT_STORE_PROV_DELETE_CRL_FUNC */
    NULL, /* CERT_STORE_PROV_SET_CRL_PROPERTY_FUNC */
    NULL, /* CERT_STORE_PROV_READ_CTL_FUNC */
    NULL, /* CERT_STORE_PROV_WRITE_CTL_FUNC */
    NULL, /* CERT_STORE_PROV_DELETE_CTL_FUNC */
    NULL, /* CERT_STORE_PROV_SET_CTL_PROPERTY_FUNC */
    CRYPT_RegControl,
};

static WINECRYPT_CERTSTORE *CRYPT_RegOpenStore(HCRYPTPROV hCryptProv,
 DWORD dwFlags, const void *pvPara)
{
    PWINECRYPT_CERTSTORE store = NULL;

    TRACE("(%ld, %08lx, %p)\n", hCryptProv, dwFlags, pvPara);

    if (dwFlags & CERT_STORE_DELETE_FLAG)
    {
        DWORD rc = CRYPT_RecurseDeleteKey((HKEY)pvPara, CertsW);

        if (rc == ERROR_SUCCESS || rc == ERROR_NO_MORE_ITEMS)
            rc = CRYPT_RecurseDeleteKey((HKEY)pvPara, CRLsW);
        if (rc == ERROR_SUCCESS || rc == ERROR_NO_MORE_ITEMS)
            rc = CRYPT_RecurseDeleteKey((HKEY)pvPara, CTLsW);
        if (rc == ERROR_NO_MORE_ITEMS)
            rc = ERROR_SUCCESS;
        SetLastError(rc);
    }
    else
    {
        HKEY key;

        if (DuplicateHandle(GetCurrentProcess(), (HANDLE)pvPara,
         GetCurrentProcess(), (LPHANDLE)&key,
         dwFlags & CERT_STORE_READONLY_FLAG ? KEY_READ : KEY_ALL_ACCESS,
         TRUE, 0))
        {
            PWINECRYPT_CERTSTORE memStore;

            memStore = CRYPT_MemOpenStore(hCryptProv, dwFlags, NULL);
            if (memStore)
            {
                PWINE_REGSTOREINFO regInfo = CryptMemAlloc(
                 sizeof(WINE_REGSTOREINFO));

                if (regInfo)
                {
                    CERT_STORE_PROV_INFO provInfo = { 0 };

                    regInfo->dwOpenFlags = dwFlags;
                    regInfo->cryptProv = hCryptProv;
                    regInfo->memStore = memStore;
                    regInfo->key = key;
                    InitializeCriticalSection(&regInfo->cs);
                    list_init(&regInfo->certsToDelete);
                    CRYPT_RegReadFromReg(regInfo);
                    regInfo->dirty = FALSE;
                    provInfo.cbSize = sizeof(provInfo);
                    provInfo.cStoreProvFunc = sizeof(regProvFuncs) /
                     sizeof(regProvFuncs[0]);
                    provInfo.rgpvStoreProvFunc = regProvFuncs;
                    provInfo.hStoreProv = regInfo;
                    store = CRYPT_ProvCreateStore(hCryptProv, dwFlags, memStore,
                     &provInfo);
                }
            }
        }
    }
    TRACE("returning %p\n", store);
    return store;
}

/* FIXME: this isn't complete for the Root store, in which the top-level
 * self-signed CA certs reside.  Adding a cert to the Root store should present
 * the user with a dialog indicating the consequences of doing so, and asking
 * the user to confirm whether the cert should be added.
 */
static PWINECRYPT_CERTSTORE CRYPT_SysRegOpenStoreW(HCRYPTPROV hCryptProv,
 DWORD dwFlags, const void *pvPara)
{
    static const WCHAR fmt[] = { '%','s','\\','%','s',0 };
    LPCWSTR storeName = (LPCWSTR)pvPara;
    LPWSTR storePath;
    PWINECRYPT_CERTSTORE store = NULL;
    HKEY root;
    LPCWSTR base;
    BOOL ret;

    TRACE("(%ld, %08lx, %s)\n", hCryptProv, dwFlags,
     debugstr_w((LPCWSTR)pvPara));

    if (!pvPara)
    {
        SetLastError(E_INVALIDARG);
        return NULL;
    }

    ret = TRUE;
    switch (dwFlags & CERT_SYSTEM_STORE_LOCATION_MASK)
    {
    case CERT_SYSTEM_STORE_LOCAL_MACHINE:
        root = HKEY_LOCAL_MACHINE;
        base = CERT_LOCAL_MACHINE_SYSTEM_STORE_REGPATH;
        break;
    case CERT_SYSTEM_STORE_CURRENT_USER:
        root = HKEY_CURRENT_USER;
        base = CERT_LOCAL_MACHINE_SYSTEM_STORE_REGPATH;
        break;
    case CERT_SYSTEM_STORE_CURRENT_SERVICE:
        /* hklm\Software\Microsoft\Cryptography\Services\servicename\
         * SystemCertificates
         */
        FIXME("CERT_SYSTEM_STORE_CURRENT_SERVICE, %s: stub\n",
         debugstr_w(storeName));
        return NULL;
    case CERT_SYSTEM_STORE_SERVICES:
        /* hklm\Software\Microsoft\Cryptography\Services\servicename\
         * SystemCertificates
         */
        FIXME("CERT_SYSTEM_STORE_SERVICES, %s: stub\n",
         debugstr_w(storeName));
        return NULL;
    case CERT_SYSTEM_STORE_USERS:
        /* hku\user sid\Software\Microsoft\SystemCertificates */
        FIXME("CERT_SYSTEM_STORE_USERS, %s: stub\n",
         debugstr_w(storeName));
        return NULL;
    case CERT_SYSTEM_STORE_CURRENT_USER_GROUP_POLICY:
        root = HKEY_CURRENT_USER;
        base = CERT_GROUP_POLICY_SYSTEM_STORE_REGPATH;
        break;
    case CERT_SYSTEM_STORE_LOCAL_MACHINE_GROUP_POLICY:
        root = HKEY_LOCAL_MACHINE;
        base = CERT_GROUP_POLICY_SYSTEM_STORE_REGPATH;
        break;
    case CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE:
        /* hklm\Software\Microsoft\EnterpriseCertificates */
        FIXME("CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE, %s: stub\n",
         debugstr_w(storeName));
        return NULL;
    default:
        SetLastError(E_INVALIDARG);
        return NULL;
    }

    storePath = CryptMemAlloc((lstrlenW(base) + lstrlenW(storeName) + 2) *
     sizeof(WCHAR));
    if (storePath)
    {
        LONG rc;
        HKEY key;
        REGSAM sam = dwFlags & CERT_STORE_READONLY_FLAG ? KEY_READ :
            KEY_ALL_ACCESS;

        wsprintfW(storePath, fmt, base, storeName);
        if (dwFlags & CERT_STORE_OPEN_EXISTING_FLAG)
            rc = RegOpenKeyExW(root, storePath, 0, sam, &key);
        else
        {
            DWORD disp;

            rc = RegCreateKeyExW(root, storePath, 0, NULL, 0, sam, NULL,
                                 &key, &disp);
            if (!rc && dwFlags & CERT_STORE_CREATE_NEW_FLAG &&
                disp == REG_OPENED_EXISTING_KEY)
            {
                RegCloseKey(key);
                rc = ERROR_FILE_EXISTS;
            }
        }
        if (!rc)
        {
            store = CRYPT_RegOpenStore(hCryptProv, dwFlags, key);
            RegCloseKey(key);
        }
        else
            SetLastError(rc);
        CryptMemFree(storePath);
    }
    return store;
}

static PWINECRYPT_CERTSTORE CRYPT_SysRegOpenStoreA(HCRYPTPROV hCryptProv,
 DWORD dwFlags, const void *pvPara)
{
    int len;
    PWINECRYPT_CERTSTORE ret = NULL;

    TRACE("(%ld, %08lx, %s)\n", hCryptProv, dwFlags,
     debugstr_a((LPCSTR)pvPara));

    if (!pvPara)
    {
        SetLastError(ERROR_FILE_NOT_FOUND);
        return NULL;
    }
    len = MultiByteToWideChar(CP_ACP, 0, (LPCSTR)pvPara, -1, NULL, 0);
    if (len)
    {
        LPWSTR storeName = CryptMemAlloc(len * sizeof(WCHAR));

        if (storeName)
        {
            MultiByteToWideChar(CP_ACP, 0, (LPCSTR)pvPara, -1, storeName, len);
            ret = CRYPT_SysRegOpenStoreW(hCryptProv, dwFlags, storeName);
            CryptMemFree(storeName);
        }
    }
    return ret;
}

static PWINECRYPT_CERTSTORE CRYPT_SysOpenStoreW(HCRYPTPROV hCryptProv,
 DWORD dwFlags, const void *pvPara)
{
    HCERTSTORE store = 0;
    BOOL ret;

    TRACE("(%ld, %08lx, %s)\n", hCryptProv, dwFlags,
     debugstr_w((LPCWSTR)pvPara));

    if (!pvPara)
    {
        SetLastError(ERROR_FILE_NOT_FOUND);
        return NULL;
    }
    /* This returns a different error than system registry stores if the
     * location is invalid.
     */
    switch (dwFlags & CERT_SYSTEM_STORE_LOCATION_MASK)
    {
    case CERT_SYSTEM_STORE_LOCAL_MACHINE:
    case CERT_SYSTEM_STORE_CURRENT_USER:
    case CERT_SYSTEM_STORE_CURRENT_SERVICE:
    case CERT_SYSTEM_STORE_SERVICES:
    case CERT_SYSTEM_STORE_USERS:
    case CERT_SYSTEM_STORE_CURRENT_USER_GROUP_POLICY:
    case CERT_SYSTEM_STORE_LOCAL_MACHINE_GROUP_POLICY:
    case CERT_SYSTEM_STORE_LOCAL_MACHINE_ENTERPRISE:
        ret = TRUE;
        break;
    default:
        SetLastError(ERROR_FILE_NOT_FOUND);
        ret = FALSE;
    }
    if (ret)
    {
        HCERTSTORE regStore = CertOpenStore(CERT_STORE_PROV_SYSTEM_REGISTRY_W,
         0, hCryptProv, dwFlags, pvPara);

        if (regStore)
        {
            store = CertOpenStore(CERT_STORE_PROV_COLLECTION, 0, 0,
             CERT_STORE_CREATE_NEW_FLAG, NULL);
            CertAddStoreToCollection(store, regStore,
             dwFlags & CERT_STORE_READONLY_FLAG ? 0 :
             CERT_PHYSICAL_STORE_ADD_ENABLE_FLAG, 0);
            CertCloseStore(regStore, 0);
            /* CERT_SYSTEM_STORE_CURRENT_USER returns both the HKCU and HKLM
             * stores.
             */
            if ((dwFlags & CERT_SYSTEM_STORE_LOCATION_MASK) ==
             CERT_SYSTEM_STORE_CURRENT_USER)
            {
                dwFlags &= ~CERT_SYSTEM_STORE_CURRENT_USER;
                dwFlags |= CERT_SYSTEM_STORE_LOCAL_MACHINE;
                regStore = CertOpenStore(CERT_STORE_PROV_SYSTEM_REGISTRY_W, 0,
                 hCryptProv, dwFlags, pvPara);
                if (regStore)
                {
                    CertAddStoreToCollection(store, regStore,
                     dwFlags & CERT_STORE_READONLY_FLAG ? 0 :
                     CERT_PHYSICAL_STORE_ADD_ENABLE_FLAG, 0);
                    CertCloseStore(regStore, 0);
                }
            }
        }
    }
    return (PWINECRYPT_CERTSTORE)store;
}

static PWINECRYPT_CERTSTORE CRYPT_SysOpenStoreA(HCRYPTPROV hCryptProv,
 DWORD dwFlags, const void *pvPara)
{
    int len;
    PWINECRYPT_CERTSTORE ret = NULL;

    TRACE("(%ld, %08lx, %s)\n", hCryptProv, dwFlags,
     debugstr_a((LPCSTR)pvPara));

    if (!pvPara)
    {
        SetLastError(ERROR_FILE_NOT_FOUND);
        return NULL;
    }
    len = MultiByteToWideChar(CP_ACP, 0, (LPCSTR)pvPara, -1, NULL, 0);
    if (len)
    {
        LPWSTR storeName = CryptMemAlloc(len * sizeof(WCHAR));

        if (storeName)
        {
            MultiByteToWideChar(CP_ACP, 0, (LPCSTR)pvPara, -1, storeName, len);
            ret = CRYPT_SysOpenStoreW(hCryptProv, dwFlags, storeName);
            CryptMemFree(storeName);
        }
    }
    return ret;
}

HCERTSTORE WINAPI CertOpenStore(LPCSTR lpszStoreProvider,
 DWORD dwMsgAndCertEncodingType, HCRYPTPROV hCryptProv, DWORD dwFlags,
 const void* pvPara)
{
    WINECRYPT_CERTSTORE *hcs;
    StoreOpenFunc openFunc = NULL;

    TRACE("(%s, %08lx, %08lx, %08lx, %p)\n", debugstr_a(lpszStoreProvider),
          dwMsgAndCertEncodingType, hCryptProv, dwFlags, pvPara);

    if (!HIWORD(lpszStoreProvider))
    {
        switch (LOWORD(lpszStoreProvider))
        {
        case (int)CERT_STORE_PROV_MEMORY:
            openFunc = CRYPT_MemOpenStore;
            break;
        case (int)CERT_STORE_PROV_REG:
            openFunc = CRYPT_RegOpenStore;
            break;
        case (int)CERT_STORE_PROV_COLLECTION:
            openFunc = CRYPT_CollectionOpenStore;
            break;
        case (int)CERT_STORE_PROV_SYSTEM_A:
            openFunc = CRYPT_SysOpenStoreA;
            break;
        case (int)CERT_STORE_PROV_SYSTEM_W:
            openFunc = CRYPT_SysOpenStoreW;
            break;
        case (int)CERT_STORE_PROV_SYSTEM_REGISTRY_A:
            openFunc = CRYPT_SysRegOpenStoreA;
            break;
        case (int)CERT_STORE_PROV_SYSTEM_REGISTRY_W:
            openFunc = CRYPT_SysRegOpenStoreW;
            break;
        default:
            if (LOWORD(lpszStoreProvider))
                FIXME("unimplemented type %d\n", LOWORD(lpszStoreProvider));
        }
    }
    else if (!strcasecmp(lpszStoreProvider, sz_CERT_STORE_PROV_MEMORY))
        openFunc = CRYPT_MemOpenStore;
    else if (!strcasecmp(lpszStoreProvider, sz_CERT_STORE_PROV_SYSTEM))
        openFunc = CRYPT_SysOpenStoreW;
    else if (!strcasecmp(lpszStoreProvider, sz_CERT_STORE_PROV_COLLECTION))
        openFunc = CRYPT_CollectionOpenStore;
    else if (!strcasecmp(lpszStoreProvider, sz_CERT_STORE_PROV_SYSTEM_REGISTRY))
        openFunc = CRYPT_SysRegOpenStoreW;
    else
    {
        FIXME("unimplemented type %s\n", lpszStoreProvider);
        openFunc = NULL;
    }

    if (!openFunc)
        hcs = CRYPT_ProvOpenStore(lpszStoreProvider, dwMsgAndCertEncodingType,
         hCryptProv, dwFlags, pvPara);
    else
        hcs = openFunc(hCryptProv, dwFlags, pvPara);
    return (HCERTSTORE)hcs;
}

HCERTSTORE WINAPI CertOpenSystemStoreA(HCRYPTPROV hProv,
 LPCSTR szSubSystemProtocol)
{
    if (!szSubSystemProtocol)
    {
        SetLastError(E_INVALIDARG);
        return 0;
    }
    return CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, hProv,
     CERT_SYSTEM_STORE_CURRENT_USER, szSubSystemProtocol);
}

HCERTSTORE WINAPI CertOpenSystemStoreW(HCRYPTPROV hProv,
 LPCWSTR szSubSystemProtocol)
{
    if (!szSubSystemProtocol)
    {
        SetLastError(E_INVALIDARG);
        return 0;
    }
    return CertOpenStore(CERT_STORE_PROV_SYSTEM_W, 0, hProv,
     CERT_SYSTEM_STORE_CURRENT_USER, szSubSystemProtocol);
}

BOOL WINAPI CertSaveStore(HCERTSTORE hCertStore, DWORD dwMsgAndCertEncodingType,
             DWORD dwSaveAs, DWORD dwSaveTo, void* pvSaveToPara, DWORD dwFlags)
{
    FIXME("(%p,%ld,%ld,%ld,%p,%08lx) stub!\n", hCertStore, 
          dwMsgAndCertEncodingType, dwSaveAs, dwSaveTo, pvSaveToPara, dwFlags);
    return TRUE;
}

PCCRL_CONTEXT WINAPI CertCreateCRLContext( DWORD dwCertEncodingType,
  const BYTE* pbCrlEncoded, DWORD cbCrlEncoded)
{
    PCRL_CONTEXT pcrl;
    BYTE* data;

    TRACE("%08lx %p %08lx\n", dwCertEncodingType, pbCrlEncoded, cbCrlEncoded);

    /* FIXME: semi-stub, need to use CryptDecodeObjectEx to decode the CRL. */
    pcrl = CryptMemAlloc( sizeof (CRL_CONTEXT) );
    if( !pcrl )
        return NULL;

    data = CryptMemAlloc( cbCrlEncoded );
    if( !data )
    {
        CryptMemFree( pcrl );
        return NULL;
    }

    pcrl->dwCertEncodingType = dwCertEncodingType;
    pcrl->pbCrlEncoded       = data;
    pcrl->cbCrlEncoded       = cbCrlEncoded;
    pcrl->pCrlInfo           = NULL;
    pcrl->hCertStore         = 0;

    return pcrl;
}

PCCERT_CONTEXT WINAPI CertCreateCertificateContext(DWORD dwCertEncodingType,
 const BYTE *pbCertEncoded, DWORD cbCertEncoded)
{
    PWINE_CERT_CONTEXT_DATA cert = NULL;
    BOOL ret;
    PCERT_SIGNED_CONTENT_INFO signedCert = NULL;
    PCERT_INFO certInfo = NULL;
    DWORD size = 0;

    TRACE("(%08lx, %p, %ld)\n", dwCertEncodingType, pbCertEncoded,
     cbCertEncoded);

    /* First try to decode it as a signed cert. */
    ret = CryptDecodeObjectEx(dwCertEncodingType, X509_CERT, pbCertEncoded,
     cbCertEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL, (BYTE *)&signedCert, &size);
    if (ret)
    {
        size = 0;
        ret = CryptDecodeObjectEx(dwCertEncodingType, X509_CERT_TO_BE_SIGNED,
         signedCert->ToBeSigned.pbData, signedCert->ToBeSigned.cbData,
         CRYPT_DECODE_ALLOC_FLAG, NULL, (BYTE *)&certInfo, &size);
        LocalFree(signedCert);
    }
    /* Failing that, try it as an unsigned cert */
    if (!ret)
    {
        size = 0;
        ret = CryptDecodeObjectEx(dwCertEncodingType, X509_CERT_TO_BE_SIGNED,
         pbCertEncoded, cbCertEncoded,
         CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
         (BYTE *)&certInfo, &size);
    }
    if (ret)
    {
        BYTE *data = NULL;

        cert = CryptMemAlloc(sizeof(WINE_CERT_CONTEXT_DATA));
        if (!cert)
            goto end;
        data = CryptMemAlloc(cbCertEncoded);
        if (!data)
        {
            CryptMemFree(cert);
            cert = NULL;
            goto end;
        }
        memcpy(data, pbCertEncoded, cbCertEncoded);
        cert->cert.dwCertEncodingType = dwCertEncodingType;
        cert->cert.pbCertEncoded      = data;
        cert->cert.cbCertEncoded      = cbCertEncoded;
        cert->cert.pCertInfo          = certInfo;
        cert->cert.hCertStore         = 0;
        cert->ref = 1;
        cert->type = ContextTypeData;
        cert->properties = ContextPropertyList_Create();
    }

end:
    return (PCCERT_CONTEXT)cert;
}

/* If context is a link, follows it to its linked context (recursively, if
 * necessary) and returns the data context associated with the link.
 * Otherwise just returns context.
 */
static inline PWINE_CERT_CONTEXT_DATA CertContext_GetDataContext(
 PWINE_CERT_CONTEXT context)
{
    PWINE_CERT_CONTEXT ptr = context;

    while (ptr && ptr->type == ContextTypeLink)
        ptr = ((PWINE_CERT_CONTEXT_LINK)ptr)->linked;
    return (ptr && ptr->type == ContextTypeData) ?
     (PWINE_CERT_CONTEXT_DATA)ptr : NULL;
}

DWORD WINAPI CertEnumCertificateContextProperties(PCCERT_CONTEXT pCertContext,
 DWORD dwPropId)
{
    PWINE_CERT_CONTEXT_DATA linked = CertContext_GetDataContext(
     (PWINE_CERT_CONTEXT)pCertContext);
    DWORD ret;

    TRACE("(%p, %ld)\n", pCertContext, dwPropId);

    if (linked)
        ret = ContextPropertyList_EnumPropIDs(linked->properties, dwPropId);
    else
        ret = 0;
    return ret;
}

static BOOL CertContext_GetHashProp(PWINE_CERT_CONTEXT context, DWORD dwPropId,
 ALG_ID algID, const BYTE *toHash, DWORD toHashLen, void *pvData,
 DWORD *pcbData)
{
    BOOL ret = CryptHashCertificate(0, algID, 0, toHash, toHashLen, pvData,
     pcbData);
    if (ret)
    {
        CRYPT_DATA_BLOB blob = { *pcbData, pvData };

        ret = CertContext_SetProperty(context, dwPropId, 0, &blob);
    }
    return ret;
}

static BOOL WINAPI CertContext_GetProperty(PWINE_CERT_CONTEXT context,
 DWORD dwPropId, void *pvData, DWORD *pcbData)
{
    PWINE_CERT_CONTEXT_DATA linked = CertContext_GetDataContext(context);
    BOOL ret;
    CRYPT_DATA_BLOB blob;

    TRACE("(%p, %ld, %p, %p)\n", context, dwPropId, pvData, pcbData);

    if (linked)
        ret = ContextPropertyList_FindProperty(linked->properties, dwPropId,
         &blob);
    else
        ret = FALSE;
    if (ret)
    {
        if (!pvData)
        {
            *pcbData = blob.cbData;
            ret = TRUE;
        }
        else if (*pcbData < blob.cbData)
        {
            SetLastError(ERROR_MORE_DATA);
            *pcbData = blob.cbData;
        }
        else
        {
            memcpy(pvData, blob.pbData, blob.cbData);
            *pcbData = blob.cbData;
            ret = TRUE;
        }
    }
    else
    {
        /* Implicit properties */
        switch (dwPropId)
        {
        case CERT_SHA1_HASH_PROP_ID:
            ret = CertContext_GetHashProp(context, dwPropId, CALG_SHA1,
             context->cert.pbCertEncoded, context->cert.cbCertEncoded, pvData,
             pcbData);
            break;
        case CERT_MD5_HASH_PROP_ID:
            ret = CertContext_GetHashProp(context, dwPropId, CALG_MD5,
             context->cert.pbCertEncoded, context->cert.cbCertEncoded, pvData,
             pcbData);
            break;
        case CERT_SUBJECT_NAME_MD5_HASH_PROP_ID:
            ret = CertContext_GetHashProp(context, dwPropId, CALG_MD5,
             context->cert.pCertInfo->Subject.pbData,
             context->cert.pCertInfo->Subject.cbData,
             pvData, pcbData);
            break;
        case CERT_SUBJECT_PUBLIC_KEY_MD5_HASH_PROP_ID:
            ret = CertContext_GetHashProp(context, dwPropId, CALG_MD5,
             context->cert.pCertInfo->SubjectPublicKeyInfo.PublicKey.pbData,
             context->cert.pCertInfo->SubjectPublicKeyInfo.PublicKey.cbData,
             pvData, pcbData);
            break;
        case CERT_ISSUER_SERIAL_NUMBER_MD5_HASH_PROP_ID:
            ret = CertContext_GetHashProp(context, dwPropId, CALG_MD5,
             context->cert.pCertInfo->SerialNumber.pbData,
             context->cert.pCertInfo->SerialNumber.cbData,
             pvData, pcbData);
            break;
        case CERT_SIGNATURE_HASH_PROP_ID:
            FIXME("CERT_SIGNATURE_HASH_PROP_ID unimplemented\n");
            SetLastError(CRYPT_E_NOT_FOUND);
            break;
        default:
            SetLastError(CRYPT_E_NOT_FOUND);
        }
    }
    TRACE("returning %d\n", ret);
    return ret;
}

/* info is assumed to be a CRYPT_KEY_PROV_INFO, followed by its container name,
 * provider name, and any provider parameters, in a contiguous buffer, but
 * where info's pointers are assumed to be invalid.  Upon return, info's
 * pointers point to the appropriate memory locations.
 */
static void CRYPT_FixKeyProvInfoPointers(PCRYPT_KEY_PROV_INFO info)
{
    DWORD i, containerLen, provNameLen;
    LPBYTE data = (LPBYTE)info + sizeof(CRYPT_KEY_PROV_INFO);

    info->pwszContainerName = (LPWSTR)data;
    containerLen = (lstrlenW(info->pwszContainerName) + 1) * sizeof(WCHAR);
    data += containerLen;

    info->pwszProvName = (LPWSTR)data;
    provNameLen = (lstrlenW(info->pwszProvName) + 1) * sizeof(WCHAR);
    data += provNameLen;

    info->rgProvParam = (PCRYPT_KEY_PROV_PARAM)data;
    data += info->cProvParam * sizeof(CRYPT_KEY_PROV_PARAM);

    for (i = 0; i < info->cProvParam; i++)
    {
        info->rgProvParam[i].pbData = data;
        data += info->rgProvParam[i].cbData;
    }
}

BOOL WINAPI CertGetCertificateContextProperty(PCCERT_CONTEXT pCertContext,
 DWORD dwPropId, void *pvData, DWORD *pcbData)
{
    BOOL ret;

    TRACE("(%p, %ld, %p, %p)\n", pCertContext, dwPropId, pvData, pcbData);

    switch (dwPropId)
    {
    case 0:
    case CERT_CERT_PROP_ID:
    case CERT_CRL_PROP_ID:
    case CERT_CTL_PROP_ID:
        SetLastError(E_INVALIDARG);
        ret = FALSE;
        break;
    case CERT_ACCESS_STATE_PROP_ID:
        if (!pvData)
        {
            *pcbData = sizeof(DWORD);
            ret = TRUE;
        }
        else if (*pcbData < sizeof(DWORD))
        {
            SetLastError(ERROR_MORE_DATA);
            *pcbData = sizeof(DWORD);
            ret = FALSE;
        }
        else
        {
            DWORD state = 0;

            if (pCertContext->hCertStore)
            {
                PWINECRYPT_CERTSTORE store =
                 (PWINECRYPT_CERTSTORE)pCertContext->hCertStore;

                if (!(store->dwOpenFlags & CERT_STORE_READONLY_FLAG))
                    state |= CERT_ACCESS_STATE_WRITE_PERSIST_FLAG;
            }
            *(DWORD *)pvData = state;
            ret = TRUE;
        }
        break;
    case CERT_KEY_PROV_INFO_PROP_ID:
        ret = CertContext_GetProperty((PWINE_CERT_CONTEXT)pCertContext,
         dwPropId, pvData, pcbData);
        if (ret && pvData)
            CRYPT_FixKeyProvInfoPointers((PCRYPT_KEY_PROV_INFO)pvData);
        break;
    default:
        ret = CertContext_GetProperty((PWINE_CERT_CONTEXT)pCertContext,
         dwPropId, pvData, pcbData);
    }

    TRACE("returning %d\n", ret);
    return ret;
}

/* Copies key provider info from from into to, where to is assumed to be a
 * contiguous buffer of memory large enough for from and all its associated
 * data, but whose pointers are uninitialized.
 * Upon return, to contains a contiguous copy of from, packed in the following
 * order:
 * - CRYPT_KEY_PROV_INFO
 * - pwszContainerName
 * - pwszProvName
 * - rgProvParam[0]...
 */
static void CRYPT_CopyKeyProvInfo(PCRYPT_KEY_PROV_INFO to,
 PCRYPT_KEY_PROV_INFO from)
{
    DWORD i;
    LPBYTE nextData = (LPBYTE)to + sizeof(CRYPT_KEY_PROV_INFO);

    to->pwszContainerName = (LPWSTR)nextData;
    lstrcpyW(to->pwszContainerName, from->pwszContainerName);
    nextData += (lstrlenW(from->pwszContainerName) + 1) * sizeof(WCHAR);
    to->pwszProvName = (LPWSTR)nextData;
    lstrcpyW(to->pwszProvName, from->pwszProvName);
    nextData += (lstrlenW(from->pwszProvName) + 1) * sizeof(WCHAR);
    to->dwProvType = from->dwProvType;
    to->dwFlags = from->dwFlags;
    to->cProvParam = from->cProvParam;
    to->rgProvParam = (PCRYPT_KEY_PROV_PARAM)nextData;
    nextData += to->cProvParam * sizeof(CRYPT_KEY_PROV_PARAM);
    to->dwKeySpec = from->dwKeySpec;
    for (i = 0; i < to->cProvParam; i++)
    {
        memcpy(&to->rgProvParam[i], &from->rgProvParam[i],
         sizeof(CRYPT_KEY_PROV_PARAM));
        to->rgProvParam[i].pbData = nextData;
        memcpy(to->rgProvParam[i].pbData, from->rgProvParam[i].pbData,
         from->rgProvParam[i].cbData);
        nextData += from->rgProvParam[i].cbData;
    }
}

static BOOL CertContext_SetKeyProvInfoProperty(PWINE_CERT_CONTEXT_DATA linked,
 PCRYPT_KEY_PROV_INFO info)
{
    BOOL ret;
    LPBYTE buf = NULL;
    DWORD size = sizeof(CRYPT_KEY_PROV_INFO), i, containerSize, provNameSize;

    containerSize = (lstrlenW(info->pwszContainerName) + 1) * sizeof(WCHAR);
    provNameSize = (lstrlenW(info->pwszProvName) + 1) * sizeof(WCHAR);
    size += containerSize + provNameSize;
    for (i = 0; i < info->cProvParam; i++)
        size += sizeof(CRYPT_KEY_PROV_PARAM) + info->rgProvParam[i].cbData;
    buf = CryptMemAlloc(size);
    if (buf)
    {
        CRYPT_CopyKeyProvInfo((PCRYPT_KEY_PROV_INFO)buf, info);
        ret = ContextPropertyList_SetProperty(linked->properties,
         CERT_KEY_PROV_INFO_PROP_ID, buf, size);
        CryptMemFree(buf);
    }
    else
        ret = FALSE;
    return ret;
}

static BOOL WINAPI CertContext_SetProperty(PWINE_CERT_CONTEXT context,
 DWORD dwPropId, DWORD dwFlags, const void *pvData)
{
    PWINE_CERT_CONTEXT_DATA linked = CertContext_GetDataContext(context);
    BOOL ret;

    TRACE("(%p, %ld, %08lx, %p)\n", context, dwPropId, dwFlags, pvData);

    if (!linked)
        ret = FALSE;
    else if (!pvData)
    {
        ContextPropertyList_RemoveProperty(linked->properties, dwPropId);
        ret = TRUE;
    }
    else
    {
        switch (dwPropId)
        {
        case CERT_AUTO_ENROLL_PROP_ID:
        case CERT_CTL_USAGE_PROP_ID: /* same as CERT_ENHKEY_USAGE_PROP_ID */
        case CERT_DESCRIPTION_PROP_ID:
        case CERT_FRIENDLY_NAME_PROP_ID:
        case CERT_HASH_PROP_ID:
        case CERT_KEY_IDENTIFIER_PROP_ID:
        case CERT_MD5_HASH_PROP_ID:
        case CERT_NEXT_UPDATE_LOCATION_PROP_ID:
        case CERT_PUBKEY_ALG_PARA_PROP_ID:
        case CERT_PVK_FILE_PROP_ID:
        case CERT_SIGNATURE_HASH_PROP_ID:
        case CERT_ISSUER_PUBLIC_KEY_MD5_HASH_PROP_ID:
        case CERT_SUBJECT_NAME_MD5_HASH_PROP_ID:
        case CERT_SUBJECT_PUBLIC_KEY_MD5_HASH_PROP_ID:
        case CERT_ENROLLMENT_PROP_ID:
        case CERT_CROSS_CERT_DIST_POINTS_PROP_ID:
        case CERT_RENEWAL_PROP_ID:
        {
            PCRYPT_DATA_BLOB blob = (PCRYPT_DATA_BLOB)pvData;

            ret = ContextPropertyList_SetProperty(linked->properties, dwPropId,
             blob->pbData, blob->cbData);
            break;
        }
        case CERT_DATE_STAMP_PROP_ID:
            ret = ContextPropertyList_SetProperty(linked->properties, dwPropId,
             (LPBYTE)pvData, sizeof(FILETIME));
            break;
        case CERT_KEY_PROV_INFO_PROP_ID:
            ret = CertContext_SetKeyProvInfoProperty(linked,
             (PCRYPT_KEY_PROV_INFO)pvData);
            break;
        default:
            FIXME("%ld: stub\n", dwPropId);
            ret = FALSE;
        }
    }
    TRACE("returning %d\n", ret);
    return ret;
}

BOOL WINAPI CertSetCertificateContextProperty(PCCERT_CONTEXT pCertContext,
 DWORD dwPropId, DWORD dwFlags, const void *pvData)
{
    BOOL ret;

    TRACE("(%p, %ld, %08lx, %p)\n", pCertContext, dwPropId, dwFlags, pvData);

    /* Handle special cases for "read-only"/invalid prop IDs.  Windows just
     * crashes on most of these, I'll be safer.
     */
    switch (dwPropId)
    {
    case 0:
    case CERT_ACCESS_STATE_PROP_ID:
    case CERT_CERT_PROP_ID:
    case CERT_CRL_PROP_ID:
    case CERT_CTL_PROP_ID:
        SetLastError(E_INVALIDARG);
        return FALSE;
    }
    ret = CertContext_SetProperty((PWINE_CERT_CONTEXT)pCertContext, dwPropId,
     dwFlags, pvData);
    TRACE("returning %d\n", ret);
    return ret;
}

PCCERT_CONTEXT WINAPI CertDuplicateCertificateContext(
 PCCERT_CONTEXT pCertContext)
{
    PWINE_CERT_CONTEXT context = (PWINE_CERT_CONTEXT)pCertContext;

    TRACE("(%p)\n", pCertContext);
    InterlockedIncrement(&context->ref);
    return pCertContext;
}

static void CertContext_CopyProperties(PCCERT_CONTEXT to, PCCERT_CONTEXT from)
{
    PWINE_CERT_CONTEXT_DATA toData, fromData;

    toData = CertContext_GetDataContext((PWINE_CERT_CONTEXT)to);
    fromData = CertContext_GetDataContext((PWINE_CERT_CONTEXT)from);
    ContextPropertyList_Copy(toData->properties, fromData->properties);
}

BOOL WINAPI CertAddCertificateContextToStore(HCERTSTORE hCertStore,
 PCCERT_CONTEXT pCertContext, DWORD dwAddDisposition,
 PCCERT_CONTEXT *ppStoreContext)
{
    PWINECRYPT_CERTSTORE store = (PWINECRYPT_CERTSTORE)hCertStore;
    BOOL ret = TRUE;
    PCCERT_CONTEXT toAdd = NULL, existing = NULL;

    TRACE("(%p, %p, %08lx, %p)\n", hCertStore, pCertContext,
     dwAddDisposition, ppStoreContext);

    if (dwAddDisposition != CERT_STORE_ADD_ALWAYS)
    {
        BYTE hashToAdd[20];
        DWORD size = sizeof(hashToAdd);

        ret = CertContext_GetProperty((PWINE_CERT_CONTEXT)pCertContext,
         CERT_HASH_PROP_ID, hashToAdd, &size);
        if (ret)
        {
            CRYPT_HASH_BLOB blob = { sizeof(hashToAdd), hashToAdd };

            existing = CertFindCertificateInStore(hCertStore,
             pCertContext->dwCertEncodingType, 0, CERT_FIND_SHA1_HASH, &blob,
             NULL);
        }
    }

    switch (dwAddDisposition)
    {
    case CERT_STORE_ADD_ALWAYS:
        toAdd = CertDuplicateCertificateContext(pCertContext);
        break;
    case CERT_STORE_ADD_NEW:
        if (existing)
        {
            TRACE("found matching certificate, not adding\n");
            SetLastError(CRYPT_E_EXISTS);
            ret = FALSE;
        }
        else
            toAdd = CertDuplicateCertificateContext(pCertContext);
        break;
    case CERT_STORE_ADD_REPLACE_EXISTING:
        toAdd = CertDuplicateCertificateContext(pCertContext);
        break;
    case CERT_STORE_ADD_REPLACE_EXISTING_INHERIT_PROPERTIES:
        toAdd = CertDuplicateCertificateContext(pCertContext);
        if (existing)
            CertContext_CopyProperties(toAdd, existing);
        break;
    case CERT_STORE_ADD_USE_EXISTING:
        if (existing)
            CertContext_CopyProperties(existing, pCertContext);
        break;
    default:
        FIXME("Unimplemented add disposition %ld\n", dwAddDisposition);
        ret = FALSE;
    }

    if (toAdd)
    {
        ret = store->addCert(store, (PWINE_CERT_CONTEXT)toAdd,
         (PWINE_CERT_CONTEXT)existing, ppStoreContext);
        CertFreeCertificateContext(toAdd);
    }
    CertFreeCertificateContext(existing);

    TRACE("returning %d\n", ret);
    return ret;
}

BOOL WINAPI CertAddEncodedCertificateToStore(HCERTSTORE hCertStore,
 DWORD dwCertEncodingType, const BYTE *pbCertEncoded, DWORD cbCertEncoded,
 DWORD dwAddDisposition, PCCERT_CONTEXT *ppCertContext)
{
    WINECRYPT_CERTSTORE *hcs = (WINECRYPT_CERTSTORE *)hCertStore;
    BOOL ret;

    TRACE("(%p, %08lx, %p, %ld, %08lx, %p)\n", hCertStore, dwCertEncodingType,
     pbCertEncoded, cbCertEncoded, dwAddDisposition, ppCertContext);

    if (!hcs)
        ret = FALSE;
    else if (hcs->dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
        ret = FALSE;
    else
    {
        PCCERT_CONTEXT cert = CertCreateCertificateContext(
         dwCertEncodingType, pbCertEncoded, cbCertEncoded);

        if (cert)
        {
            ret = CertAddCertificateContextToStore(hCertStore,
             cert, dwAddDisposition, ppCertContext);
            CertFreeCertificateContext(cert);
        }
        else
            ret = FALSE;
    }
    return ret;
}

PCCERT_CONTEXT WINAPI CertEnumCertificatesInStore(HCERTSTORE hCertStore,
 PCCERT_CONTEXT pPrev)
{
    WINECRYPT_CERTSTORE *hcs = (WINECRYPT_CERTSTORE *)hCertStore;
    PCCERT_CONTEXT ret;

    TRACE("(%p, %p)\n", hCertStore, pPrev);
    if (!hCertStore)
        ret = NULL;
    else if (hcs->dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
        ret = NULL;
    else
        ret = (PCCERT_CONTEXT)hcs->enumCert(hcs, (PWINE_CERT_CONTEXT)pPrev);
    return ret;
}

BOOL WINAPI CertDeleteCertificateFromStore(PCCERT_CONTEXT pCertContext)
{
    BOOL ret;

    TRACE("(%p)\n", pCertContext);

    if (!pCertContext)
        ret = TRUE;
    else if (!pCertContext->hCertStore)
    {
        ret = TRUE;
        CertFreeCertificateContext(pCertContext);
    }
    else
    {
        PWINECRYPT_CERTSTORE hcs =
         (PWINECRYPT_CERTSTORE)pCertContext->hCertStore;

        if (hcs->dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
            ret = FALSE;
        else
            ret = hcs->deleteCert(hcs, pCertContext, 0);
        CertFreeCertificateContext(pCertContext);
    }
    return ret;
}

BOOL WINAPI CertAddEncodedCRLToStore(HCERTSTORE hCertStore,
 DWORD dwCertEncodingType, const BYTE *pbCrlEncoded, DWORD cbCrlEncoded,
 DWORD dwAddDisposition, PCCRL_CONTEXT *ppCrlContext)
{
    FIXME("(%p, %08lx, %p, %ld, %08lx, %p): stub\n", hCertStore,
     dwCertEncodingType, pbCrlEncoded, cbCrlEncoded, dwAddDisposition,
     ppCrlContext);
    return FALSE;
}

BOOL WINAPI CertAddCRLContextToStore( HCERTSTORE hCertStore,
             PCCRL_CONTEXT pCrlContext, DWORD dwAddDisposition,
             PCCRL_CONTEXT* ppStoreContext )
{
    FIXME("%p %p %08lx %p\n", hCertStore, pCrlContext,
          dwAddDisposition, ppStoreContext);
    return TRUE;
}

PCCRL_CONTEXT WINAPI CertDuplicateCRLContext(PCCRL_CONTEXT pCrlContext)
{
    FIXME("(%p): stub\n", pCrlContext);
    return pCrlContext;
}

BOOL WINAPI CertFreeCRLContext( PCCRL_CONTEXT pCrlContext)
{
    FIXME("%p\n", pCrlContext );

    return TRUE;
}

BOOL WINAPI CertDeleteCRLFromStore(PCCRL_CONTEXT pCrlContext)
{
    FIXME("(%p): stub\n", pCrlContext);
    return TRUE;
}

PCCRL_CONTEXT WINAPI CertEnumCRLsInStore(HCERTSTORE hCertStore,
 PCCRL_CONTEXT pPrev)
{
    FIXME("(%p, %p): stub\n", hCertStore, pPrev);
    return NULL;
}

PCCTL_CONTEXT WINAPI CertCreateCTLContext(DWORD dwCertEncodingType,
  const BYTE* pbCtlEncoded, DWORD cbCtlEncoded)
{
    FIXME("(%08lx, %p, %08lx): stub\n", dwCertEncodingType, pbCtlEncoded,
     cbCtlEncoded);
    return NULL;
}

BOOL WINAPI CertAddEncodedCTLToStore(HCERTSTORE hCertStore,
 DWORD dwMsgAndCertEncodingType, const BYTE *pbCtlEncoded, DWORD cbCtlEncoded,
 DWORD dwAddDisposition, PCCTL_CONTEXT *ppCtlContext)
{
    FIXME("(%p, %08lx, %p, %ld, %08lx, %p): stub\n", hCertStore,
     dwMsgAndCertEncodingType, pbCtlEncoded, cbCtlEncoded, dwAddDisposition,
     ppCtlContext);
    return FALSE;
}

BOOL WINAPI CertAddCTLContextToStore(HCERTSTORE hCertStore,
 PCCTL_CONTEXT pCtlContext, DWORD dwAddDisposition,
 PCCTL_CONTEXT* ppStoreContext)
{
    FIXME("(%p, %p, %08lx, %p): stub\n", hCertStore, pCtlContext,
     dwAddDisposition, ppStoreContext);
    return TRUE;
}

PCCTL_CONTEXT WINAPI CertDuplicateCTLContext(PCCTL_CONTEXT pCtlContext)
{
    FIXME("(%p): stub\n", pCtlContext );
    return pCtlContext;
}

BOOL WINAPI CertFreeCTLContext(PCCTL_CONTEXT pCtlContext)
{
    FIXME("(%p): stub\n", pCtlContext );
    return TRUE;
}

BOOL WINAPI CertDeleteCTLFromStore(PCCTL_CONTEXT pCtlContext)
{
    FIXME("(%p): stub\n", pCtlContext);
    return TRUE;
}

PCCTL_CONTEXT WINAPI CertEnumCTLsInStore(HCERTSTORE hCertStore,
 PCCTL_CONTEXT pPrev)
{
    FIXME("(%p, %p): stub\n", hCertStore, pPrev);
    return NULL;
}

HCERTSTORE WINAPI CertDuplicateStore(HCERTSTORE hCertStore)
{
    WINECRYPT_CERTSTORE *hcs = (WINECRYPT_CERTSTORE *)hCertStore;

    TRACE("(%p)\n", hCertStore);

    if (hcs && hcs->dwMagic == WINE_CRYPTCERTSTORE_MAGIC)
        InterlockedIncrement(&hcs->ref);
    return hCertStore;
}

BOOL WINAPI CertCloseStore(HCERTSTORE hCertStore, DWORD dwFlags)
{
    WINECRYPT_CERTSTORE *hcs = (WINECRYPT_CERTSTORE *) hCertStore;

    TRACE("(%p, %08lx)\n", hCertStore, dwFlags);

    if( ! hCertStore )
        return TRUE;

    if ( hcs->dwMagic != WINE_CRYPTCERTSTORE_MAGIC )
        return FALSE;

    if (InterlockedDecrement(&hcs->ref) == 0)
    {
        TRACE("%p's ref count is 0, freeing\n", hcs);
        hcs->dwMagic = 0;
        if (!(hcs->dwOpenFlags & CERT_STORE_NO_CRYPT_RELEASE_FLAG))
            CryptReleaseContext(hcs->cryptProv, 0);
        hcs->closeStore(hcs, dwFlags);
    }
    else
        TRACE("%p's ref count is %ld\n", hcs, hcs->ref);
    return TRUE;
}

BOOL WINAPI CertControlStore(HCERTSTORE hCertStore, DWORD dwFlags,
 DWORD dwCtrlType, void const *pvCtrlPara)
{
    WINECRYPT_CERTSTORE *hcs = (WINECRYPT_CERTSTORE *)hCertStore;
    BOOL ret;

    TRACE("(%p, %08lx, %ld, %p)\n", hCertStore, dwFlags, dwCtrlType,
     pvCtrlPara);

    if (!hcs)
        ret = FALSE;
    else if (hcs->dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
        ret = FALSE;
    else
    {
        if (hcs->control)
            ret = hcs->control(hCertStore, dwFlags, dwCtrlType, pvCtrlPara);
        else
            ret = TRUE;
    }
    return ret;
}

BOOL WINAPI CertGetCRLContextProperty(PCCRL_CONTEXT pCRLContext,
 DWORD dwPropId, void *pvData, DWORD *pcbData)
{
    FIXME("(%p, %ld, %p, %p): stub\n", pCRLContext, dwPropId, pvData, pcbData);
    return FALSE;
}

BOOL WINAPI CertSetCRLContextProperty(PCCRL_CONTEXT pCRLContext,
 DWORD dwPropId, DWORD dwFlags, const void *pvData)
{
    FIXME("(%p, %ld, %08lx, %p): stub\n", pCRLContext, dwPropId, dwFlags,
     pvData);
    return FALSE;
}

BOOL WINAPI CertGetCTLContextProperty(PCCTL_CONTEXT pCTLContext,
 DWORD dwPropId, void *pvData, DWORD *pcbData)
{
    FIXME("(%p, %ld, %p, %p): stub\n", pCTLContext, dwPropId, pvData, pcbData);
    return FALSE;
}

BOOL WINAPI CertSetCTLContextProperty(PCCTL_CONTEXT pCTLContext,
 DWORD dwPropId, DWORD dwFlags, const void *pvData)
{
    FIXME("(%p, %ld, %08lx, %p): stub\n", pCTLContext, dwPropId, dwFlags,
     pvData);
    return FALSE;
}

static void CertDataContext_Free(PWINE_CERT_CONTEXT_DATA context)
{
    CryptMemFree(context->cert.pbCertEncoded);
    LocalFree(context->cert.pCertInfo);
    ContextPropertyList_Free(context->properties);
    CryptMemFree(context);
}

static void CertLinkContext_Free(PWINE_CERT_CONTEXT_LINK context)
{
    CertFreeCertificateContext((PCCERT_CONTEXT)context->linked);
    CryptMemFree(context);
}

static void CertContext_Release(PWINE_CERT_CONTEXT context)
{
    if (InterlockedDecrement(&context->ref) == 0)
    {
        TRACE("freeing %p\n", context);
        switch (context->type)
        {
        case ContextTypeData:
            CertDataContext_Free((PWINE_CERT_CONTEXT_DATA)context);
            break;
        case ContextTypeLink:
            CertLinkContext_Free((PWINE_CERT_CONTEXT_LINK)context);
            break;
        default:
            assert(0);
        }
    }
    else
        TRACE("%p's ref count is %ld\n", context, context->ref);
}

BOOL WINAPI CertFreeCertificateContext(PCCERT_CONTEXT pCertContext)
{
    TRACE("(%p)\n", pCertContext);

    if (pCertContext)
        CertContext_Release((PWINE_CERT_CONTEXT)pCertContext);
    return TRUE;
}

BOOL WINAPI CertAddStoreToCollection(HCERTSTORE hCollectionStore,
 HCERTSTORE hSiblingStore, DWORD dwUpdateFlags, DWORD dwPriority)
{
    PWINE_COLLECTIONSTORE collection = (PWINE_COLLECTIONSTORE)hCollectionStore;
    WINECRYPT_CERTSTORE *sibling = (WINECRYPT_CERTSTORE *)hSiblingStore;
    PWINE_STORE_LIST_ENTRY entry;
    BOOL ret;

    TRACE("(%p, %p, %08lx, %ld)\n", hCollectionStore, hSiblingStore,
     dwUpdateFlags, dwPriority);

    if (!collection || !sibling)
        return TRUE;
    if (collection->hdr.dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
    {
        SetLastError(E_INVALIDARG);
        return FALSE;
    }
    if (collection->hdr.type != StoreTypeCollection)
    {
        SetLastError(E_INVALIDARG);
        return FALSE;
    }
    if (sibling->dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
    {
        SetLastError(E_INVALIDARG);
        return FALSE;
    }

    entry = CryptMemAlloc(sizeof(WINE_STORE_LIST_ENTRY));
    if (entry)
    {
        InterlockedIncrement(&sibling->ref);
        TRACE("sibling %p's ref count is %ld\n", sibling, sibling->ref);
        entry->store = sibling;
        entry->dwUpdateFlags = dwUpdateFlags;
        entry->dwPriority = dwPriority;
        list_init(&entry->entry);
        TRACE("%p: adding %p, priority %ld\n", collection, entry, dwPriority);
        EnterCriticalSection(&collection->cs);
        if (dwPriority)
        {
            PWINE_STORE_LIST_ENTRY cursor;
            BOOL added = FALSE;

            LIST_FOR_EACH_ENTRY(cursor, &collection->stores,
             WINE_STORE_LIST_ENTRY, entry)
            {
                if (cursor->dwPriority < dwPriority)
                {
                    list_add_before(&cursor->entry, &entry->entry);
                    added = TRUE;
                    break;
                }
            }
            if (!added)
                list_add_tail(&collection->stores, &entry->entry);
        }
        else
            list_add_tail(&collection->stores, &entry->entry);
        LeaveCriticalSection(&collection->cs);
        ret = TRUE;
    }
    else
        ret = FALSE;
    return ret;
}

void WINAPI CertRemoveStoreFromCollection(HCERTSTORE hCollectionStore,
 HCERTSTORE hSiblingStore)
{
    PWINE_COLLECTIONSTORE collection = (PWINE_COLLECTIONSTORE)hCollectionStore;
    WINECRYPT_CERTSTORE *sibling = (WINECRYPT_CERTSTORE *)hSiblingStore;
    PWINE_STORE_LIST_ENTRY store, next;

    TRACE("(%p, %p)\n", hCollectionStore, hSiblingStore);

    if (!collection || !sibling)
        return;
    if (collection->hdr.dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
    {
        SetLastError(E_INVALIDARG);
        return;
    }
    if (collection->hdr.type != StoreTypeCollection)
        return;
    if (sibling->dwMagic != WINE_CRYPTCERTSTORE_MAGIC)
    {
        SetLastError(E_INVALIDARG);
        return;
    }
    EnterCriticalSection(&collection->cs);
    LIST_FOR_EACH_ENTRY_SAFE(store, next, &collection->stores,
     WINE_STORE_LIST_ENTRY, entry)
    {
        if (store->store == sibling)
        {
            list_remove(&store->entry);
            CertCloseStore(store->store, 0);
            CryptMemFree(store);
            break;
        }
    }
    LeaveCriticalSection(&collection->cs);
}
