/* * Copyright (C) 2009 Daniel Verkamp <daniel@drv.nu>. * * 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 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <stdio.h> #include <string.h> #include <unistd.h> #include <gpxe/command.h> #include <gpxe/image.h> #include <gpxe/crypto.h> #include <gpxe/md5.h> #include <gpxe/sha1.h> /** * "digest" command syntax message * * @v argv Argument list */ static void digest_syntax ( char **argv ) { printf ( "Usage:\n" " %s <image name>\n" "\n" "Calculate the %s of an image\n", argv[0], argv[0] ); } /** * The "digest" command * * @v argc Argument count * @v argv Argument list * @v digest Digest algorithm * @ret rc Exit code */ static int digest_exec ( int argc, char **argv, struct digest_algorithm *digest ) { const char *image_name; struct image *image; uint8_t digest_ctx[digest->ctxsize]; uint8_t digest_out[digest->digestsize]; uint8_t buf[128]; size_t offset; size_t len; size_t frag_len; int i; unsigned j; if ( argc < 2 || !strcmp ( argv[1], "--help" ) || !strcmp ( argv[1], "-h" ) ) { digest_syntax ( argv ); return 1; } for ( i = 1 ; i < argc ; i++ ) { image_name = argv[i]; /* find image */ image = find_image ( image_name ); if ( ! image ) { printf ( "No such image: %s\n", image_name ); continue; } offset = 0; len = image->len; /* calculate digest */ digest_init ( digest, digest_ctx ); while ( len ) { frag_len = len; if ( frag_len > sizeof ( buf ) ) frag_len = sizeof ( buf ); copy_from_user ( buf, image->data, offset, frag_len ); digest_update ( digest, digest_ctx, buf, frag_len ); len -= frag_len; offset += frag_len; } digest_final ( digest, digest_ctx, digest_out ); for ( j = 0 ; j < sizeof ( digest_out ) ; j++ ) printf ( "%02x", digest_out[j] ); printf ( " %s\n", image->name ); } return 0; } static int md5sum_exec ( int argc, char **argv ) { return digest_exec ( argc, argv, &md5_algorithm ); } static int sha1sum_exec ( int argc, char **argv ) { return digest_exec ( argc, argv, &sha1_algorithm ); } struct command md5sum_command __command = { .name = "md5sum", .exec = md5sum_exec, }; struct command sha1sum_command __command = { .name = "sha1sum", .exec = sha1sum_exec, };