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https://github.com/woo-j/zint.git
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698 lines
22 KiB
C
698 lines
22 KiB
C
/* gs1.c - Verifies GS1 data */
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/*
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libzint - the open source barcode library
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Copyright (C) 2009-2017 Robin Stuart <rstuart114@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the project nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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/* vim: set ts=4 sw=4 et : */
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef _MSC_VER
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#include <malloc.h>
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#endif
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#include "common.h"
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#include "gs1.h"
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/* This code does some checks on the integrity of GS1 data. It is not intended
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to be bulletproof, nor does it report very accurately what problem was found
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or where, but should prevent some of the more common encoding errors */
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void itostr(char ai_string[], int ai_value) {
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int thou, hund, ten, unit;
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char temp[2];
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strcpy(ai_string, "(");
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thou = ai_value / 1000;
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hund = (ai_value - (1000 * thou)) / 100;
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ten = (ai_value - ((1000 * thou) + (100 * hund))) / 10;
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unit = ai_value - ((1000 * thou) + (100 * hund) + (10 * ten));
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temp[1] = '\0';
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if (ai_value >= 1000) {
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temp[0] = itoc(thou);
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strcat(ai_string, temp);
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}
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if (ai_value >= 100) {
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temp[0] = itoc(hund);
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strcat(ai_string, temp);
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}
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temp[0] = itoc(ten);
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strcat(ai_string, temp);
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temp[0] = itoc(unit);
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strcat(ai_string, temp);
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strcat(ai_string, ")");
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}
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int gs1_verify(struct zint_symbol *symbol, const unsigned char source[], const size_t src_len, char reduced[]) {
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int i, j, last_ai, ai_latch;
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char ai_string[7]; /* 6 char max "(NNNN)" */
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int bracket_level, max_bracket_level, ai_length, max_ai_length, min_ai_length;
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int ai_count;
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int error_latch;
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#ifdef _MSC_VER
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int *ai_value;
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int *ai_location;
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int *data_location;
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int *data_length;
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#endif
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int ai_max = ustrchr_cnt(source, src_len, '[') + 1; /* Plus 1 so non-zero */
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#ifndef _MSC_VER
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int ai_value[ai_max], ai_location[ai_max], data_location[ai_max], data_length[ai_max];
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#else
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ai_value = (int*) _alloca(ai_max * sizeof(int));
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ai_location = (int*) _alloca(ai_max * sizeof(int));
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data_location = (int*) _alloca(ai_max * sizeof(int));
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data_length = (int*) _alloca(ai_max * sizeof(int));
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#endif
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/* Detect extended ASCII characters */
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for (i = 0; i < src_len; i++) {
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if (source[i] >= 128) {
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strcpy(symbol->errtxt, "250: Extended ASCII characters are not supported by GS1");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (source[i] == '\0') {
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strcpy(symbol->errtxt, "262: NUL characters not permitted in GS1 mode");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (source[i] < 32) {
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strcpy(symbol->errtxt, "251: Control characters are not supported by GS1");
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return ZINT_ERROR_INVALID_DATA;
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}
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}
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if (source[0] != '[') {
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strcpy(symbol->errtxt, "252: Data does not start with an AI");
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return ZINT_ERROR_INVALID_DATA;
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}
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/* Check the position of the brackets */
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bracket_level = 0;
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max_bracket_level = 0;
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ai_length = 0;
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max_ai_length = 0;
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min_ai_length = 5;
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j = 0;
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ai_latch = 0;
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for (i = 0; i < src_len; i++) {
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ai_length += j;
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if (((j == 1) && (source[i] != ']')) && ((source[i] < '0') || (source[i] > '9'))) {
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ai_latch = 1;
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}
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if (source[i] == '[') {
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bracket_level++;
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j = 1;
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}
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if (source[i] == ']') {
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bracket_level--;
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if (ai_length < min_ai_length) {
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min_ai_length = ai_length;
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}
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j = 0;
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ai_length = 0;
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}
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if (bracket_level > max_bracket_level) {
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max_bracket_level = bracket_level;
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}
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if (ai_length > max_ai_length) {
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max_ai_length = ai_length;
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}
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}
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min_ai_length--;
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if (bracket_level != 0) {
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/* Not all brackets are closed */
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strcpy(symbol->errtxt, "253: Malformed AI in input data (brackets don\'t match)");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (max_bracket_level > 1) {
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/* Nested brackets */
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strcpy(symbol->errtxt, "254: Found nested brackets in input data");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (max_ai_length > 4) {
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/* AI is too long */
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strcpy(symbol->errtxt, "255: Invalid AI in input data (AI too long)");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (min_ai_length <= 1) {
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/* AI is too short */
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strcpy(symbol->errtxt, "256: Invalid AI in input data (AI too short)");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (ai_latch == 1) {
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/* Non-numeric data in AI */
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strcpy(symbol->errtxt, "257: Invalid AI in input data (non-numeric characters in AI)");
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return ZINT_ERROR_INVALID_DATA;
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}
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ai_count = 0;
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for (i = 1; i < src_len; i++) {
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if (source[i - 1] == '[') {
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ai_location[ai_count] = i;
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j = 0;
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do {
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ai_string[j] = source[i + j];
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j++;
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} while (ai_string[j - 1] != ']');
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ai_string[j - 1] = '\0';
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ai_value[ai_count] = atoi(ai_string);
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ai_count++;
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}
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}
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for (i = 0; i < ai_count; i++) {
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data_location[i] = ai_location[i] + 3;
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if (ai_value[i] >= 100) {
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data_location[i]++;
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}
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if (ai_value[i] >= 1000) {
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data_location[i]++;
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}
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data_length[i] = 0;
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do {
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data_length[i]++;
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} while ((source[data_location[i] + data_length[i] - 1] != '[') && (data_location[i] + data_length[i] <= src_len));
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data_length[i]--;
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}
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for (i = 0; i < ai_count; i++) {
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if (data_length[i] == 0) {
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/* No data for given AI */
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strcpy(symbol->errtxt, "258: Empty data field in input data");
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return ZINT_ERROR_INVALID_DATA;
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}
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}
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strcpy(ai_string, "");
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// Check for valid AI values and data lengths according to GS1 General
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// Specification Release 19, January 2019
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for (i = 0; i < ai_count; i++) {
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error_latch = 2;
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switch (ai_value[i]) {
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// Length 2 Fixed
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case 20: // VARIANT
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if (data_length[i] != 2) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 3 Fixed
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case 422: // ORIGIN
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case 424: // COUNTRY PROCESS
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case 426: // COUNTRY FULL PROCESS
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if (data_length[i] != 3) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 4 Fixed
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case 7040: // UIC+EXT
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case 8111: // POINTS
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if (data_length[i] != 4) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 6 Fixed
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case 11: // PROD DATE
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case 12: // DUE DATE
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case 13: // PACK DATE
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case 15: // BEST BY
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case 16: // SELL BY
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case 17: // USE BY
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case 7006: // FIRST FREEZE DATE
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case 8005: // PRICE PER UNIT
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if (data_length[i] != 6) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 10 Fixed
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case 7003: // EXPIRY TIME
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if (data_length[i] != 10) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 13 Fixed
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case 410: // SHIP TO LOC
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case 411: // BILL TO
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case 412: // PURCHASE FROM
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case 413: // SHIP FOR LOC
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case 414: // LOC NO
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case 415: // PAY TO
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case 416: // PROD/SERV LOC
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case 417: // PARTY GLN
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case 7001: // NSN
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if (data_length[i] != 13) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 14 Fixed
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case 1: // GTIN
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case 2: // CONTENT
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case 8001: // DIMENSIONS
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if (data_length[i] != 14) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 17 Fixed
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case 402: // GSIN
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if (data_length[i] != 17) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 18 Fixed
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case 0: // SSCC
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case 8006: // ITIP
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case 8017: // GSRN PROVIDER
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case 8018: // GSRN RECIPIENT
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case 8026: // ITIP CONTENT
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if (data_length[i] != 18) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 2 Max
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case 7010: // PROD METHOD
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if (data_length[i] > 2) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 3 Max
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case 427: // ORIGIN SUBDIVISION
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case 7008: // AQUATIC SPECIES
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if (data_length[i] > 3) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 4 Max
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case 7004: // ACTIVE POTENCY
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if (data_length[i] > 4) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 6 Max
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case 242: // MTO VARIANT
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if (data_length[i] > 6) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 8 Max
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case 30: // VAR COUNT
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case 37: // COUNT
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if (data_length[i] > 8) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 10 Max
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case 7009: // FISHING GEAR TYPE
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case 8019: // SRIN
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if (data_length[i] > 10) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 12 Max
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case 7005: // CATCH AREA
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case 8011: // CPID SERIAL
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if (data_length[i] > 12) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 20 Max
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case 10: // BATCH/LOT
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case 21: // SERIAL
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case 22: // CPV
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case 243: // PCN
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case 254: // GLN EXTENSION COMPONENT
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case 420: // SHIP TO POST
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case 7020: // REFURB LOT
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case 7021: // FUNC STAT
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case 7022: // REV STAT
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case 710: // NHRN PZN
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case 711: // NHRN CIP
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case 712: // NHRN CN
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case 713: // NHRN DRN
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case 714: // NHRN AIM
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case 7240: // PROTOCOL
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case 8002: // CMT NO
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case 8012: // VERSION
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if (data_length[i] > 20) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 25 Max
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case 8020: // REF NO
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if (data_length[i] > 25) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 28 Max
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case 235: // TPX
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if (data_length[i] > 28) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 30 Max
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case 240: // ADDITIONAL ID
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case 241: // CUST PART NO
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case 250: // SECONDARY SERIAL
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case 251: // REF TO SOURCE
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case 400: // ORDER NUMBER
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case 401: // GINC
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case 403: // ROUTE
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case 7002: // MEAT CUT
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case 7023: // GIAI ASSEMBLY
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case 8004: // GIAI
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case 8010: // CPID
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case 8013: // BUDI-DI
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case 90: // INTERNAL
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if (data_length[i] > 30) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 34 Max
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case 8007: // IBAN
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if (data_length[i] > 34) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 50 Max
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case 8009: // OPTSEN
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if (data_length[i] > 50) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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// Length 70 Max
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case 8110: // Coupon code
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case 8112: // Paperless coupon code
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case 8200: // PRODUCT URL
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if (data_length[i] > 70) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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break;
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}
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if (ai_value[i] == 253) { // GDTI
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if ((data_length[i] < 14) || (data_length[i] > 30)) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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}
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if (ai_value[i] == 255) { // GCN
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if ((data_length[i] < 14) || (data_length[i] > 25)) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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}
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if ((ai_value[i] >= 3100) && (ai_value[i] <= 3169)) {
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if (data_length[i] != 6) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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}
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if ((ai_value[i] >= 3200) && (ai_value[i] <= 3379)) {
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if (data_length[i] != 6) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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}
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if ((ai_value[i] >= 3400) && (ai_value[i] <= 3579)) {
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if (data_length[i] != 6) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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}
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if ((ai_value[i] >= 3600) && (ai_value[i] <= 3699)) {
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if (data_length[i] != 6) {
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error_latch = 1;
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} else {
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error_latch = 0;
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}
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}
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if ((ai_value[i] >= 3900) && (ai_value[i] <= 3909)) { // AMOUNT
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if (data_length[i] > 15) {
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error_latch = 1;
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} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if ((ai_value[i] >= 3910) && (ai_value[i] <= 3919)) { // AMOUNT
|
|
if ((data_length[i] < 4) || (data_length[i] > 18)) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if ((ai_value[i] >= 3920) && (ai_value[i] <= 3929)) { // PRICE
|
|
if (data_length[i] > 15) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if ((ai_value[i] >= 3930) && (ai_value[i] <= 3939)) { // PRICE
|
|
if ((data_length[i] < 4) || (data_length[i] > 18)) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if ((ai_value[i] >= 3940) && (ai_value[i] <= 3949)) { // PRCNT OFF
|
|
if (data_length[i] != 4) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if (ai_value[i] == 421) { // SHIP TO POST
|
|
if ((data_length[i] < 4) || (data_length[i] > 12)) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if ((ai_value[i] == 423) || (ai_value[i] == 425)) {
|
|
// COUNTRY INITIAL PROCESS || COUNTRY DISASSEMBLY
|
|
if ((data_length[i] < 4) || (data_length[i] > 15)) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if (ai_value[i] == 7007) { // HARVEST DATE
|
|
if ((data_length[i] != 6) && (data_length[i] != 12)) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if ((ai_value[i] >= 7030) && (ai_value[i] <= 7039)) { // PROCESSOR #
|
|
if ((data_length[i] < 4) || (data_length[i] > 30)) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if ((ai_value[i] >= 7230) && (ai_value[i] <= 7239)) { // CERT #
|
|
if ((data_length[i] < 3) || (data_length[i] > 30)) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if (ai_value[i] == 8003) { // GRAI
|
|
if ((data_length[i] < 15) || (data_length[i] > 30)) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if (ai_value[i] == 8008) { // PROD TIME
|
|
if ((data_length[i] != 8) && (data_length[i] != 10) && (data_length[i] != 12)) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if ((ai_value[i] >= 91) && (ai_value[i] <= 99)) { // INTERNAL
|
|
if (data_length[i] > 90) {
|
|
error_latch = 1;
|
|
} else {
|
|
error_latch = 0;
|
|
}
|
|
}
|
|
|
|
if (error_latch == 1) {
|
|
itostr(ai_string, ai_value[i]);
|
|
strcpy(symbol->errtxt, "259: Invalid data length for AI ");
|
|
strcat(symbol->errtxt, ai_string);
|
|
return ZINT_ERROR_INVALID_DATA;
|
|
}
|
|
|
|
if (error_latch == 2) {
|
|
itostr(ai_string, ai_value[i]);
|
|
strcpy(symbol->errtxt, "260: Invalid AI value ");
|
|
strcat(symbol->errtxt, ai_string);
|
|
return ZINT_ERROR_INVALID_DATA;
|
|
}
|
|
}
|
|
|
|
/* Resolve AI data - put resulting string in 'reduced' */
|
|
j = 0;
|
|
last_ai = 0;
|
|
ai_latch = 1;
|
|
for (i = 0; i < src_len; i++) {
|
|
if ((source[i] != '[') && (source[i] != ']')) {
|
|
reduced[j++] = source[i];
|
|
}
|
|
if (source[i] == '[') {
|
|
/* Start of an AI string */
|
|
if (ai_latch == 0) {
|
|
reduced[j++] = '[';
|
|
}
|
|
ai_string[0] = source[i + 1];
|
|
ai_string[1] = source[i + 2];
|
|
ai_string[2] = '\0';
|
|
last_ai = atoi(ai_string);
|
|
ai_latch = 0;
|
|
/* The following values from "GS-1 General Specification version 8.0 issue 2, May 2008"
|
|
figure 5.4.8.2.1 - 1 "Element Strings with Pre-Defined Length Using Application Identifiers" */
|
|
if (
|
|
((last_ai >= 0) && (last_ai <= 4))
|
|
|| ((last_ai >= 11) && (last_ai <= 20))
|
|
|| (last_ai == 23) /* legacy support - see 5.3.8.2.2 */
|
|
|| ((last_ai >= 31) && (last_ai <= 36))
|
|
|| (last_ai == 41)
|
|
) {
|
|
ai_latch = 1;
|
|
}
|
|
}
|
|
/* The ']' character is simply dropped from the input */
|
|
}
|
|
reduced[j] = '\0';
|
|
|
|
/* the character '[' in the reduced string refers to the FNC1 character */
|
|
return 0;
|
|
}
|