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/*
* 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,
};
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