casadm: Add missing safeclib files

Signed-off-by: Robert Baldyga <robert.baldyga@huawei.com>

casadm/safeclib/strcpyfld_s.c

@@ -0,0 +1,199 @@
+/*------------------------------------------------------------------
+ * strcpyfld_s.c
+ *
+ * November 2008, Bo Berry
+ *
+ * Copyright (c) 2008-2011 by Cisco Systems, Inc
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *------------------------------------------------------------------
+ */
+
+#include "safeclib_private.h"
+#include "safe_str_constraint.h"
+#include "safe_str_lib.h"
+
+
+/**
+ * NAME
+ *    strcpyfld_s
+ *
+ * SYNOPSIS
+ *    #include "safe_str_lib.h"
+ *    errno_t
+ *    strcpyfld_s(char *dest, rsize_t dmax, const char *src, rsize_t slen)
+ *
+ * DESCRIPTION
+ *    The strcpyfld_s function copies slen characters from the character
+ *    array pointed to by src into the character array pointed to by dest.
+ *    The copy operation does not stop on the null character as the
+ *    function copies slen characters.
+ *
+ * EXTENSION TO
+ *    ISO/IEC TR 24731-1, Programming languages, environments
+ *    and system software interfaces, Extensions to the C Library,
+ *    Part I: Bounds-checking interfaces
+ *
+ * INPUT PARAMETERS
+ *    dest      pointer to character array that will be replaced by src.
+ *
+ *    dmax      restricted maximum length of dest
+ *
+ *    src       pointer to the character array that will be copied
+ *              to dest
+ *
+ *    slen      maximum length of src
+ *
+ * OUTPUT PARAMETERS
+ *    dest      updated
+ *
+ * RUNTIME CONSTRAINTS
+ *    Neither dest nor src shall be a null pointer.
+ *    dmax shall not equal zero.
+ *    dmax shall not be greater than RSIZE_MAX_STR.
+ *    slen shall not equal zero.
+ *    slen shall not exceed dmax
+ *    Copying shall not take place between objects that overlap.
+ *    If there is a runtime-constraint violation, then if dest
+ *       is not a null pointer and destmax is greater than zero and
+ *       not greater than RSIZE_MAX_STR, then strcpyfld_s nulls dest.
+ *
+ * RETURN VALUE
+ *    EOK        successful operation
+ *    ESNULLP    NULL pointer
+ *    ESZEROL    zero length
+ *    ESLEMAX    length exceeds max limit
+ *    ESOVRLP    strings overlap
+ *
+ * ALSO SEE
+ *    strcpyfldin_s(), strcpyfldout_s()
+ *
+ */
+errno_t
+strcpyfld_s (char *dest, rsize_t dmax, const char *src, rsize_t slen)
+{
+    rsize_t orig_dmax;
+    char *orig_dest;
+    const char *overlap_bumper;
+
+    if (dest == NULL) {
+        invoke_safe_str_constraint_handler("strcpyfld_s: dest is null",
+                   NULL, ESNULLP);
+        return (ESNULLP);
+    }
+
+    if (dmax == 0) {
+        invoke_safe_str_constraint_handler("strcpyfld_s: dmax is 0",
+                   NULL, ESZEROL);
+        return (ESZEROL);
+    }
+
+    if (dmax > RSIZE_MAX_STR) {
+        invoke_safe_str_constraint_handler("strcpyfld_s: dmax exceeds max",
+                   NULL, ESLEMAX);
+        return (ESLEMAX);
+    }
+
+    if (src == NULL) {
+        /* null string to clear data */
+        while (dmax) {  *dest = '\0'; dmax--; dest++; }
+
+        invoke_safe_str_constraint_handler("strcpyfld_s: src is null",
+                   NULL, ESNULLP);
+        return (ESNULLP);
+    }
+
+    if (slen == 0) {
+        /* null string to clear data */
+        while (dmax) {  *dest = '\0'; dmax--; dest++; }
+
+        invoke_safe_str_constraint_handler("strcpyfld_s: slen is 0",
+                   NULL, ESZEROL);
+        return (ESZEROL);
+    }
+
+    if (slen > dmax) {
+        /* null string to clear data */
+        while (dmax) {  *dest = '\0'; dmax--; dest++; }
+
+        invoke_safe_str_constraint_handler("strcpyfld_s: src exceeds max",
+                   NULL, ESLEMAX);
+        return (ESLEMAX);
+    }
+
+
+    /* hold base of dest in case src was not copied */
+    orig_dmax = dmax;
+    orig_dest = dest;
+
+    if (dest < src) {
+        overlap_bumper = src;
+
+        while (slen > 0) {
+
+            if (dest == overlap_bumper) {
+                dmax = orig_dmax;
+                dest = orig_dest;
+
+                /* null string to eliminate partial copy */
+                while (dmax) { *dest = '\0'; dmax--; dest++; }
+
+                invoke_safe_str_constraint_handler(
+                          "strcpyfld_s: overlapping objects",
+                           NULL, ESOVRLP);
+                return (ESOVRLP);
+            }
+
+            *dest++ = *src++;
+            slen--;
+            dmax--;
+        }
+
+    } else {
+        overlap_bumper = dest;
+
+        while (slen > 0) {
+
+            if (src == overlap_bumper) {
+                dmax = orig_dmax;
+                dest = orig_dest;
+
+                /* null string to eliminate partial copy */
+                while (dmax) { *dest = '\0'; dmax--; dest++; }
+
+                invoke_safe_str_constraint_handler(
+                          "strcpyfld_s: overlapping objects",
+                           NULL, ESOVRLP);
+                return (ESOVRLP);
+            }
+
+            *dest++ = *src++;
+            slen--;
+            dmax--;
+        }
+    }
+
+    /* null slack space in the field */
+    while (dmax) { *dest = '\0'; dmax--; dest++; }
+    return (EOK);
+}