341 lines
8.3 KiB
C
341 lines
8.3 KiB
C
/*
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* Written by Oron Peled <oron@actcom.co.il>
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* Copyright (C) 2012, Xorcom
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <xtalk/debug.h>
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#include "astribank_license.h"
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#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
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static const struct boundary {
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const char *name;
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const char *markers[2];
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} boundaries[] = {
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[LICENSE_MARKER_NONE] = { /* Skip 0 */
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},
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[LICENSE_MARKER_XORCOM] = {
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"Xorcom",
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{
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"-----BEGIN XORCOM LICENSE BLOCK-----",
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"-----END XORCOM LICENSE BLOCK-----",
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},
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},
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[LICENSE_MARKER_GENERIC] = {
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"Generic",
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{
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"-----BEGIN TELEPHONY DEVICE LICENSE BLOCK-----",
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"-----END TELEPHONY DEVICE LICENSE BLOCK-----",
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}
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},
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};
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void license_markers_help(const char *prefix, FILE *fp)
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{
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int i;
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fprintf(fp, "%sValid license markers:\n", prefix);
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for (i = LICENSE_MARKER_NONE + 1; i < ARRAY_SIZE(boundaries); i++) {
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const struct boundary *b = &boundaries[i];
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if (b->markers[0] != 0)
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fprintf(fp, "%s\t%d - %s\n", prefix, i, b->name);
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}
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}
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int license_marker_valid(unsigned int which)
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{
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if (which >= ARRAY_SIZE(boundaries))
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return 0;
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if (boundaries[which].markers[0] == NULL)
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return 0;
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return 1;
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}
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static const char *marker_string(unsigned int which, int end_marker)
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{
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int selector = (end_marker) ? 1 : 0;
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if (license_marker_valid(which)) {
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return boundaries[which].markers[selector];
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}
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ERR("gen_marker: invalid marker %d\n", which);
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return NULL;
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}
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static int marker_find(const char *str, int end_marker)
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{
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int selector = (end_marker) ? 1 : 0;
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int i;
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for (i = LICENSE_MARKER_NONE + 1; i < ARRAY_SIZE(boundaries); i++) {
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const struct boundary *b = &boundaries[i];
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const char *marker_str = b->markers[selector];
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#if 0
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DBG("marker_find(%s,%d)[%d]: %s\n",
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str, end_marker, i, marker_str);
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#endif
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if (!marker_str)
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continue;
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if (strcmp(str, marker_str) == 0)
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return i;
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}
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return 0;
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}
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static int bin_to_file(void *buf, int len, FILE *f)
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{
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static int bytes_on_line;
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unsigned char *p = buf;
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if (buf == NULL) {
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if (bytes_on_line != 0) {
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if (fprintf(f, "\n") != 1)
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return -1;
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bytes_on_line = 0;
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}
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return 0;
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}
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int i;
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for (i = 0; i < len; i++) {
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if (fprintf(f, "%02x", *p++) != 2)
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return -1;
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bytes_on_line++;
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if (bytes_on_line >= 16) {
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if (fprintf(f, "\n") != 1)
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return -1;
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bytes_on_line = 0;
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}
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}
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return 0;
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}
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int write_to_file(
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struct eeprom_table *eeprom_table,
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struct capabilities *caps,
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struct capkey *key,
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unsigned int marker,
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FILE *f)
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{
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fprintf(f, "%s\n", marker_string(marker, 0));
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fprintf(f, "Version: 1.0\n");
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fprintf(f, "Timestamp: %u\n", caps->timestamp);
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fprintf(f, "Serial: %.*s\n", LABEL_SIZE, eeprom_table->label);
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fprintf(f, "Capabilities.Port.FXS: %d\n", caps->ports_fxs);
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fprintf(f, "Capabilities.Port.FXO: %d\n", caps->ports_fxo);
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fprintf(f, "Capabilities.Port.BRI: %d\n", caps->ports_bri);
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fprintf(f, "Capabilities.Port.PRI: %d\n", caps->ports_pri);
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fprintf(f, "Capabilities.Port.ECHO: %d\n", caps->ports_echo);
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fprintf(f, "Capabilities.Twinstar: %d\n", CAP_EXTRA_TWINSTAR(caps));
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fprintf(f, "Data:\n");
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bin_to_file(eeprom_table, sizeof(*eeprom_table), f);
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bin_to_file(caps, sizeof(*caps), f);
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bin_to_file(key, sizeof(*key), f);
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bin_to_file(NULL, 0, f);
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fprintf(f, "%s\n", marker_string(marker, 1));
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return 0;
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}
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/*
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* Removes whitespace on both sizes of the string.
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* Returns a pointer to the first non-space char. The string
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* is modified in place to trim trailing whitespace.
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* If the whole string is whitespace, returns NULL.
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*/
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static char *trim(char *s)
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{
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int len = strlen(s);
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while (len > 0 && isspace(s[len-1])) {
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len--;
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}
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if (len == 0)
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return NULL;
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s[len] = '\0';
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while (isspace(*s))
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s++;
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/* *s is not a space, since in this case we'd return NULL above */
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return s;
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}
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static int get_key_value(char *line, char **key, char **value)
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{
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char *p = strchr(line, ':');
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if (p == NULL)
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return -1;
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*p = '\0';
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*key = trim(line);
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*value = trim(p + 1);
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return 0;
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}
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static int hex_digit_to_int(char c)
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{
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if (c >= '0' && c <= '9')
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return c - '0';
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else if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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else
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return -1;
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}
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static int str_to_bin(char *line, void *buf, int maxlen)
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{
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static int offset;
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unsigned char *p = buf;
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if (strlen(line) % 2 != 0)
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return -1;
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while (offset < maxlen && *line) {
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uint8_t value;
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char c = hex_digit_to_int(*line++);
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if (c < 0 || *line == '\0')
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return -1;
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value = c << 4;
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c = hex_digit_to_int(*line++);
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if (c < 0)
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return -1;
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value |= c;
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p[offset++] = value;
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}
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if (offset == maxlen && *line)
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return -1;
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return offset;
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}
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int read_from_file(
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struct eeprom_table *eeprom_table,
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struct capabilities *caps,
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struct capkey *capkey,
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unsigned int *used_marker,
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FILE *f)
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{
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char buf[256];
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char *line, *key, *value;
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int lineno = 0;
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unsigned int license_marker_begin = 0;
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unsigned int license_marker_end;
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struct table {
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struct eeprom_table eeprom_table;
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struct capabilities capabilities;
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struct capkey capkey;
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} PACKED table;
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enum PARSE_STATES {
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STATE_BEFORE_LICENSE = 0,
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STATE_EXPECT_VERSION = 1,
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STATE_EXPECT_DATA = 2,
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STATE_READ_DATA = 3,
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STATE_AFTER_LICENSE = 4,
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} state = STATE_BEFORE_LICENSE;
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memset(&table, 0, sizeof(struct table));
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/*
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* states:
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* 0: start - before BEGIN_LICENSE_BLOCK line. on BEGIN_LICENSE_BLOCK line goto 1.
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* 1: read Version, goto 2. if not version line then error.
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* 2: after BEGIN line. split line into key:value. if line is Data:, goto 3.
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* 3: read binary data. if line is END_LICENSE_BLOCK goto 4.
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* 4: END_LICENSE_BLOCK - ignore lines.
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*/
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while (fgets(buf, 256, f) != NULL) {
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lineno++;
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int len = strlen(buf);
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if (len > 0 && buf[len-1] != '\n') {
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ERR("Line %d: Line too long\n", lineno);
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return -1;
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}
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line = trim(buf);
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if (line == NULL) {
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if (state > STATE_BEFORE_LICENSE && state < STATE_AFTER_LICENSE) {
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ERR("Line %d: Empty line\n", lineno);
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return -1;
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}
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else
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continue;
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}
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switch (state) {
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case STATE_BEFORE_LICENSE:
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license_marker_begin = marker_find(line, 0);
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if (license_marker_begin)
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state = STATE_EXPECT_VERSION;
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else {
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ERR("Line %d: Invalid license begin block\n", lineno);
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return -1;
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}
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break;
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case STATE_EXPECT_VERSION:
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if (get_key_value(line, &key, &value) < 0) {
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ERR("Line %d: Can't parse line\n", lineno);
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return -1;
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}
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if (strcmp(key, "Version") == 0) {
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if (strcmp(value, "1.0") == 0) {
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state = STATE_EXPECT_DATA;
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} else {
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ERR("Line %d: Unknown license file version '%s', need version '1.0'\n", lineno, value);
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return -1;
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}
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} else {
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ERR("Line %d: No license file version\n", lineno);
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return -1;
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}
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break;
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case STATE_EXPECT_DATA:
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if (get_key_value(line, &key, &value) < 0) {
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ERR("Line %d: Can't parse line\n", lineno);
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return -1;
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}
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if (strcmp(key, "Data") == 0) {
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state = STATE_READ_DATA;
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break;
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}
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break;
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case STATE_READ_DATA:
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license_marker_end = marker_find(line, 1);
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if (license_marker_end) {
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if (license_marker_end != license_marker_begin) {
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ERR("Line %d: End marker != Begin marker\n", lineno);
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return -1;
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}
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state = STATE_AFTER_LICENSE;
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break;
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}
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if (str_to_bin(line, &table, sizeof(table)) < 0) {
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ERR("Line %d: Error in data block\n", lineno);
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return -1;
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}
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break;
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case STATE_AFTER_LICENSE:
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break;
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}
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}
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if (state != STATE_AFTER_LICENSE) {
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ERR("Invalid license file\n");
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return -1;
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}
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memcpy(eeprom_table, &table.eeprom_table, sizeof(*eeprom_table));
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memcpy(caps, &table.capabilities, sizeof(*caps));
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memcpy(capkey, &table.capkey, sizeof(*capkey));
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return 0;
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}
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