--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nspr/pr/src/md/windows/ntsec.c	Mon Jul 28 10:47:06 2014 +0200
@@ -0,0 +1,261 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "primpl.h"
+
+/*
+ * ntsec.c
+ *
+ * Implement the POSIX-style mode bits (access permissions) for
+ * files and other securable objects in Windows NT using Windows
+ * NT's security descriptors with appropriate discretionary
+ * access-control lists.
+ */
+
+/*
+ * The security identifiers (SIDs) for owner, primary group,
+ * and the Everyone (World) group.
+ *
+ * These SIDs are looked up during NSPR initialization and
+ * saved in this global structure (see _PR_NT_InitSids) so
+ * that _PR_NT_MakeSecurityDescriptorACL doesn't need to
+ * look them up every time.
+ */
+static struct {
+    PSID owner;
+    PSID group;
+    PSID everyone;
+} _pr_nt_sids;
+
+/*
+ * Initialize the SIDs for owner, primary group, and the Everyone
+ * group in the _pr_nt_sids structure.
+ *
+ * This function needs to be called by NSPR initialization.
+ */
+void _PR_NT_InitSids(void)
+{
+#ifdef WINCE /* not supported */
+    return;
+#else
+    SID_IDENTIFIER_AUTHORITY SIDAuthWorld = SECURITY_WORLD_SID_AUTHORITY;
+    HANDLE hToken = NULL; /* initialized to an arbitrary value to
+                           * silence a Purify UMR warning */
+    PSID infoBuffer[1024/sizeof(PSID)]; /* defined as an array of PSIDs
+                                         * to force proper alignment */
+    PTOKEN_OWNER pTokenOwner = (PTOKEN_OWNER) infoBuffer;
+    PTOKEN_PRIMARY_GROUP pTokenPrimaryGroup
+            = (PTOKEN_PRIMARY_GROUP) infoBuffer;
+    DWORD dwLength;
+    BOOL rv;
+
+    /*
+     * Look up and make a copy of the owner and primary group
+     * SIDs in the access token of the calling process.
+     */
+    rv = OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken);
+    if (rv == 0) {
+        /*
+         * On non-NT systems, this function is not implemented
+         * (error code ERROR_CALL_NOT_IMPLEMENTED), and neither are
+         * the other security functions.  There is no point in
+         * going further.
+         *
+         * A process with insufficient access permissions may fail
+         * with the error code ERROR_ACCESS_DENIED.
+         */
+        PR_LOG(_pr_io_lm, PR_LOG_DEBUG,
+                ("_PR_NT_InitSids: OpenProcessToken() failed. Error: %d",
+                GetLastError()));
+        return;
+    }
+
+    rv = GetTokenInformation(hToken, TokenOwner, infoBuffer,
+            sizeof(infoBuffer), &dwLength);
+    PR_ASSERT(rv != 0);
+    dwLength = GetLengthSid(pTokenOwner->Owner);
+    _pr_nt_sids.owner = (PSID) PR_Malloc(dwLength);
+    PR_ASSERT(_pr_nt_sids.owner != NULL);
+    rv = CopySid(dwLength, _pr_nt_sids.owner, pTokenOwner->Owner);
+    PR_ASSERT(rv != 0);
+
+    rv = GetTokenInformation(hToken, TokenPrimaryGroup, infoBuffer,
+            sizeof(infoBuffer), &dwLength);
+    PR_ASSERT(rv != 0);
+    dwLength = GetLengthSid(pTokenPrimaryGroup->PrimaryGroup);
+    _pr_nt_sids.group = (PSID) PR_Malloc(dwLength);
+    PR_ASSERT(_pr_nt_sids.group != NULL);
+    rv = CopySid(dwLength, _pr_nt_sids.group,
+            pTokenPrimaryGroup->PrimaryGroup);
+    PR_ASSERT(rv != 0);
+
+    rv = CloseHandle(hToken);
+    PR_ASSERT(rv != 0);
+
+    /* Create a well-known SID for the Everyone group. */
+    rv = AllocateAndInitializeSid(&SIDAuthWorld, 1,
+            SECURITY_WORLD_RID,
+            0, 0, 0, 0, 0, 0, 0,
+            &_pr_nt_sids.everyone);
+    PR_ASSERT(rv != 0);
+#endif
+}
+
+/*
+ * Free the SIDs for owner, primary group, and the Everyone group
+ * in the _pr_nt_sids structure.
+ *
+ * This function needs to be called by NSPR cleanup.
+ */
+void
+_PR_NT_FreeSids(void)
+{
+#ifdef WINCE
+    return;
+#else
+    if (_pr_nt_sids.owner) {
+        PR_Free(_pr_nt_sids.owner);
+    }
+    if (_pr_nt_sids.group) {
+        PR_Free(_pr_nt_sids.group);
+    }
+    if (_pr_nt_sids.everyone) {
+        FreeSid(_pr_nt_sids.everyone);
+    }
+#endif
+}
+
+/*
+ * Construct a security descriptor whose discretionary access-control
+ * list implements the specified mode bits.  The SIDs for owner, group,
+ * and everyone are obtained from the global _pr_nt_sids structure.
+ * Both the security descriptor and access-control list are returned
+ * and should be freed by a _PR_NT_FreeSecurityDescriptorACL call.
+ *
+ * The accessTable array maps NSPR's read, write, and execute access
+ * rights to the corresponding NT access rights for the securable
+ * object.
+ */
+PRStatus
+_PR_NT_MakeSecurityDescriptorACL(
+    PRIntn mode,
+    DWORD accessTable[],
+    PSECURITY_DESCRIPTOR *resultSD,
+    PACL *resultACL)
+{
+#ifdef WINCE
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return PR_FAILURE;
+#else
+    PSECURITY_DESCRIPTOR pSD = NULL;
+    PACL pACL = NULL;
+    DWORD cbACL;  /* size of ACL */
+    DWORD accessMask;
+
+    if (_pr_nt_sids.owner == NULL) {
+        PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+    pSD = (PSECURITY_DESCRIPTOR) PR_Malloc(SECURITY_DESCRIPTOR_MIN_LENGTH);
+    if (pSD == NULL) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+    if (!InitializeSecurityDescriptor(pSD, SECURITY_DESCRIPTOR_REVISION)) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+    if (!SetSecurityDescriptorOwner(pSD, _pr_nt_sids.owner, FALSE)) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+    if (!SetSecurityDescriptorGroup(pSD, _pr_nt_sids.group, FALSE)) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+
+    /*
+     * Construct a discretionary access-control list with three
+     * access-control entries, one each for owner, primary group,
+     * and Everyone.
+     */
+
+    cbACL = sizeof(ACL)
+          + 3 * (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD))
+          + GetLengthSid(_pr_nt_sids.owner)
+          + GetLengthSid(_pr_nt_sids.group)
+          + GetLengthSid(_pr_nt_sids.everyone);
+    pACL = (PACL) PR_Malloc(cbACL);
+    if (pACL == NULL) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+    if (!InitializeAcl(pACL, cbACL, ACL_REVISION)) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+    accessMask = 0;
+    if (mode & 00400) accessMask |= accessTable[0];
+    if (mode & 00200) accessMask |= accessTable[1];
+    if (mode & 00100) accessMask |= accessTable[2];
+    if (accessMask && !AddAccessAllowedAce(pACL, ACL_REVISION, accessMask,
+            _pr_nt_sids.owner)) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+    accessMask = 0;
+    if (mode & 00040) accessMask |= accessTable[0];
+    if (mode & 00020) accessMask |= accessTable[1];
+    if (mode & 00010) accessMask |= accessTable[2];
+    if (accessMask && !AddAccessAllowedAce(pACL, ACL_REVISION, accessMask,
+            _pr_nt_sids.group)) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+    accessMask = 0;
+    if (mode & 00004) accessMask |= accessTable[0];
+    if (mode & 00002) accessMask |= accessTable[1];
+    if (mode & 00001) accessMask |= accessTable[2];
+    if (accessMask && !AddAccessAllowedAce(pACL, ACL_REVISION, accessMask,
+            _pr_nt_sids.everyone)) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+
+    if (!SetSecurityDescriptorDacl(pSD, TRUE, pACL, FALSE)) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        goto failed;
+    }
+
+    *resultSD = pSD;
+    *resultACL = pACL;
+    return PR_SUCCESS;
+
+failed:
+    if (pSD) {
+        PR_Free(pSD);
+    }
+    if (pACL) {
+        PR_Free(pACL);
+    }
+    return PR_FAILURE;
+#endif
+}
+
+/*
+ * Free the specified security descriptor and access-control list
+ * previously created by _PR_NT_MakeSecurityDescriptorACL.
+ */
+void
+_PR_NT_FreeSecurityDescriptorACL(PSECURITY_DESCRIPTOR pSD, PACL pACL)
+{
+    if (pSD) {
+        PR_Free(pSD);
+    }
+    if (pACL) {
+        PR_Free(pACL);
+    }
+}