1afc8db96a
This commit replaces most atoi() calls (which don't report errors) with a strtol() wrapper function for stronger string -> integer conversion validation.
131 lines
3.0 KiB
C
131 lines
3.0 KiB
C
/*
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*****************************************************************************
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*
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* File: fko_util.c
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*
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* Author: Michael Rash
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*
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* Purpose: Provide a set of common utility functions that fwknop can use.
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*
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* Copyright 2012 Michael Rash (mbr@cipherdyne.org)
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*
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* License (GNU Public License):
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*****************************************************************************
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*/
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#include "fko_common.h"
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#include "fko.h"
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#include <errno.h>
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/* Validate encoded message length
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*/
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int
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is_valid_encoded_msg_len(const int len)
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{
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if(len < MIN_SPA_ENCODED_MSG_SIZE || len >= MAX_SPA_ENCODED_MSG_SIZE)
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return(0);
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return(1);
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}
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/* Validate plaintext input size
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*/
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int
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is_valid_pt_msg_len(const int len)
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{
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if(len < MIN_SPA_PLAINTEXT_MSG_SIZE || len >= MAX_SPA_PLAINTEXT_MSG_SIZE)
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return(0);
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return(1);
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}
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/* Validate digest length
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*/
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int
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is_valid_digest_len(const int len)
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{
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switch(len)
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{
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case MD5_B64_LEN:
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break;
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case SHA1_B64_LEN:
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break;
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case SHA256_B64_LEN:
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break;
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case SHA384_B64_LEN:
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break;
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case SHA512_B64_LEN:
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break;
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default:
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return(0);
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}
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return(1);
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}
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int
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strtol_wrapper(const char * const str, const int min,
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const int max, const int exit_upon_err, int *err)
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{
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int val;
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errno = 0;
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*err = FKO_SUCCESS;
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val = strtol(str, (char **) NULL, 10);
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if ((errno == ERANGE || (errno != 0 && val == 0)))
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{
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*err = errno;
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if(exit_upon_err == EXIT_UPON_ERR)
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{
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perror("strtol");
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exit(EXIT_FAILURE);
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}
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}
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if(val < min)
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{
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*err = FKO_ERROR_INVALID_DATA;
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if(exit_upon_err == EXIT_UPON_ERR)
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{
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fprintf(stderr, "[*] Value %d out of range %d - %d\n",
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val, min, max);
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exit(EXIT_FAILURE);
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}
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}
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/* allow max==0 to be an exception where we don't care about the
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* maximum - note that the ERANGE check is still in place above
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*/
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if((max > 0) && (val > max))
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{
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*err = FKO_ERROR_INVALID_DATA;
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if(exit_upon_err == EXIT_UPON_ERR)
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{
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fprintf(stderr, "[*] Value %d out of range %d - %d\n",
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val, min, max);
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exit(EXIT_FAILURE);
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}
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}
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return val;
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}
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/***EOF***/
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