diff options
Diffstat (limited to 'ownership.c')
| -rw-r--r-- | ownership.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/ownership.c b/ownership.c new file mode 100644 index 0000000..d79af12 --- /dev/null +++ b/ownership.c @@ -0,0 +1,214 @@ +/* + * Compaq Ownership Tag + * + * Copyright (C) 2003-2005 Jean Delvare <khali@linux-fr.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * For the avoidance of doubt the "preferred form" of this code is one which + * is in an open unpatent encumbered format. Where cryptographic key signing + * forms part of the process of creating an executable the information + * including keys needed to generate an equivalently functional executable + * are deemed to be part of the source code. + * + * References: + * - Compaq "Technical Reference Guide for Compaq Deskpro 4000 and 6000" + * First Edition + * http://h18000.www1.hp.com/support/techpubs/technical_reference_guides/113a1097.html + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <getopt.h> + +#include "version.h" +#include "config.h" +#include "types.h" +#include "util.h" + +/* Options are global */ +struct opt +{ + const char *devmem; + unsigned int flags; +}; +static struct opt opt; + +#define FLAG_VERSION (1 << 0) +#define FLAG_HELP (1 << 1) + +static void ownership(u32 base, const char *pname, const char *devmem) +{ + u8 *buf; + int i; + + /* read the ownership tag */ + if ((buf = mem_chunk(base, 0x51, devmem)) == NULL) + { + perror(pname); + return; + } + + /* chop the trailing garbage */ + i = 0x4f; + while (i >= 0 && (buf[i] == 0x20 || buf[i] == 0x00)) + i--; + buf[i + 1] = '\0'; + + /* filter and print */ + if (i >= 0) + { + for (; i >= 0; i--) + { + if (buf[i] < 32 || (buf[i] >= 127 && buf[i] < 160)) + buf[i] = '?'; + } + printf("%s\n", (char *)buf); + } + + free(buf); +} + +static u32 decode(const u8 *p) +{ + int i; + + /* integrity checking (lack of checksum) */ + for (i = 0; i < p[4]; i++) + { + if (p[5 + i * 10] != '$' + || !(p[6 + i * 10] >= 'A' && p[6 + i * 10] <= 'Z') + || !(p[7 + i * 10] >= 'A' && p[7 + i * 10] <= 'Z') + || !(p[8 + i * 10] >= 'A' && p[8 + i * 10] <= 'Z')) + { + printf("\t Abnormal Entry! Please report. [%02x %02x %02x %02x]\n", + p[5 + i * 10], p[6 + i * 10], + p[7 + i * 10], p[8 + i * 10]); + return 0; + } + } + + /* search for the right entry */ + for (i = 0; i < p[4]; i++) + if (memcmp(p + 5 + i * 10, "$ERB", 4) == 0) + return DWORD(p + 9 + i * 10); + + return 0; +} + +/* Return -1 on error, 0 on success */ +static int parse_command_line(int argc, char * const argv[]) +{ + int option; + const char *optstring = "d:hV"; + struct option longopts[] = { + { "dev-mem", required_argument, NULL, 'd' }, + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, 'V' }, + { 0, 0, 0, 0 } + }; + + while ((option = getopt_long(argc, argv, optstring, longopts, NULL)) != -1) + switch (option) + { + case 'd': + opt.devmem = optarg; + break; + case 'h': + opt.flags |= FLAG_HELP; + break; + case 'V': + opt.flags |= FLAG_VERSION; + break; + case '?': + return -1; + } + + return 0; +} + +static void print_help(void) +{ + static const char *help = + "Usage: ownership [OPTIONS]\n" + "Options are:\n" + " -d, --dev-mem FILE Read memory from device FILE (default: " DEFAULT_MEM_DEV ")\n" + " -h, --help Display this help text and exit\n" + " -V, --version Display the version and exit\n"; + + printf("%s", help); +} + +int main(int argc, char * const argv[]) +{ + u8 *buf; + off_t fp; + int ok = 0; + + if (sizeof(u8) != 1 || sizeof(u32) != 4) + { + fprintf(stderr, "%s: compiler incompatibility\n", argv[0]); + exit(255); + } + + /* Set default option values */ + opt.devmem = DEFAULT_MEM_DEV; + opt.flags = 0; + + if (parse_command_line(argc, argv)<0) + exit(2); + + if (opt.flags & FLAG_HELP) + { + print_help(); + return 0; + } + + if (opt.flags & FLAG_VERSION) + { + printf("%s\n", VERSION); + return 0; + } + + if ((buf = mem_chunk(0xE0000, 0x20000, opt.devmem)) == NULL) + exit(1); + + for (fp = 0; !ok && fp <= 0x1FFF0; fp += 16) + { + u8 *p = buf + fp; + + if (memcmp((char *)p, "32OS", 4) == 0) + { + off_t len = p[4] * 10 + 5; + + if (fp + len - 1 <= 0x1FFFF) + { + u32 base; + + if ((base = decode(p))) + { + ok = 1; + ownership(base, argv[0], opt.devmem); + } + } + } + } + + free(buf); + + return 0; +} |