169 lines
4.9 KiB
C
169 lines
4.9 KiB
C
/*------------------------------------------------------------------
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* strispassword_s.c
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*
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* October 2008, Bo Berry
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*
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* Copyright (c) 2008-2011, 2013 by Cisco Systems, Inc
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*------------------------------------------------------------------
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*/
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#include "safeclib_private.h"
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#include "safe_str_constraint.h"
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#include "safe_str_lib.h"
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/**
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* NAME
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* strispassword_s
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*
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* SYNOPSIS
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* #include "strlib.h"
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* bool
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* strispassword_s(const char *dest, rsize_t dmax)
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*
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* DESCRIPTION
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* This function validates the make-up of a password string.
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* -SAFE_STR_PASSWORD_MIN_LENGTH character minimum
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* -SAFE_STR_PASSWORD_MAX_LENGTH character maximum
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* -at least SAFE_STR_MIN_LOWERCASE lower case characters
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* -at least SAFE_STR_MIN_UPPERCASE upper case characters
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* -at least SAFE_STR_MIN_NUMBERS number
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* -at least SAFE_STR_MIN_SPECIALS special
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*
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* EXTENSION TO
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* ISO/IEC TR 24731, Programming languages, environments
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* and system software interfaces, Extensions to the C Library,
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* Part I: Bounds-checking interfaces
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*
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* INPUT PARAMETERS
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* dest pointer to string
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*
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* dmax length of password string
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*
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* OUTPUT PARAMETERS
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* none
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*
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* RUNTIME CONSTRAINTS
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* dest shall not be a null pointer.
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* length > SAFE_STR_PASSWORD_MIN_LENGTH
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* length < SAFE_STR_PASSWORD_MAX_LENGTH
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* dest shall not be unterminated
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*
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* RETURN VALUE
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* true, string has valid password makeup
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* false, string does not meet requirements or an error occurred
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*
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* ALSO SEE
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* strzero_s()
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*
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*/
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bool
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strispassword_s (const char *dest, rsize_t dmax)
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{
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uint32_t cnt_all;
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uint32_t cnt_lowercase;
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uint32_t cnt_uppercase;
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uint32_t cnt_numbers;
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uint32_t cnt_specials;
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if (!dest) {
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invoke_safe_str_constraint_handler("strispassword_s: "
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"dest is null",
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NULL, ESNULLP);
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return (false);
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}
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if (dmax < SAFE_STR_PASSWORD_MIN_LENGTH) {
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invoke_safe_str_constraint_handler("strispassword_s: "
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"dest is too short",
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NULL, ESLEMIN);
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return (false);
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}
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if (dmax > SAFE_STR_PASSWORD_MAX_LENGTH) {
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invoke_safe_str_constraint_handler("strispassword_s: "
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"dest exceeds max",
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NULL, ESLEMAX);
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return (false);
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}
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if (*dest == '\0') {
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return (false);
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}
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cnt_all = cnt_lowercase = cnt_uppercase = 0;
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cnt_numbers = cnt_specials = 0;
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while (*dest) {
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if (dmax == 0) {
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invoke_safe_str_constraint_handler(
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"strispassword_s: dest is unterminated",
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NULL, ESUNTERM);
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return (false);
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}
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dmax--;
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cnt_all++;
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if ((*dest >= '0') && (*dest <= '9')) {
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cnt_numbers++;
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} else if ((*dest >= 'a') && (*dest <= 'z')) {
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cnt_lowercase++;
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} else if ((*dest >= 'A') && (*dest <= 'Z')) {
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cnt_uppercase++;
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/* allow all specials */
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} else if ((*dest >= 33) && (*dest <= 47)) {
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cnt_specials++;
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} else if ((*dest >= 58) && (*dest <= 64)) {
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cnt_specials++;
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} else if ((*dest >= 91) && (*dest <= 94)) {
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cnt_specials++;
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} else if ((*dest >= 95) && (*dest <= 96)) {
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cnt_specials++;
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} else if ((*dest >= 123) && (*dest <= 126)) {
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cnt_specials++;
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} else {
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/* illegal char in password string */
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return (false);
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}
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dest++;
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}
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if (cnt_all < SAFE_STR_PASSWORD_MAX_LENGTH &&
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cnt_numbers >= SAFE_STR_MIN_NUMBERS &&
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cnt_lowercase >= SAFE_STR_MIN_LOWERCASE &&
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cnt_uppercase >= SAFE_STR_MIN_UPPERCASE &&
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cnt_specials >= SAFE_STR_MIN_SPECIALS ) {
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return (true);
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} else {
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return (false);
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}
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}
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