digest_cmd.c File Reference

#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>

Go to the source code of this file.

Functions
static void	digest_syntax (char **argv)
	"digest" command syntax message
static int	digest_exec (int argc, char **argv, struct digest_algorithm *digest)
	The "digest" command.
static int	md5sum_exec (int argc, char **argv)
static int	sha1sum_exec (int argc, char **argv)
Variables
struct command md5sum_command	__command

---

Function Documentation

static void digest_syntax

(

char **

argv

)

[static]

"digest" command syntax message

Parameters:

argv

Argument list

Definition at line 34 of file digest_cmd.c.

References printf().

Referenced by digest_exec().

                                          {
        printf ( "Usage:\n"
                 "  %s <image name>\n"
                 "\n"
                 "Calculate the %s of an image\n",
                 argv[0], argv[0] );
}

static int digest_exec	(	int	argc,
		char **	argv,
		struct digest_algorithm *	digest
	)			[static]

The "digest" command.

Parameters:

	argc	Argument count
	argv	Argument list
	digest	Digest algorithm

Return values:

rc

Exit code

Definition at line 50 of file digest_cmd.c.

References copy_from_user(), digest_algorithm::ctxsize, image::data, digest_final(), digest_init(), digest_syntax(), digest_update(), digest_algorithm::digestsize, find_image(), image::len, image::name, offset, printf(), and strcmp().

Referenced by md5sum_exec(), and sha1sum_exec().

                                                           {
        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
	)			[static]

Definition at line 104 of file digest_cmd.c.

References digest_exec(), and md5_algorithm.

                                                 {
        return digest_exec ( argc, argv, &md5_algorithm );
}

static int sha1sum_exec	(	int	argc,
		char **	argv
	)			[static]

Definition at line 108 of file digest_cmd.c.

References digest_exec(), and sha1_algorithm.

                                                  {
        return digest_exec ( argc, argv, &sha1_algorithm );
}

---

Variable Documentation

struct command sha1sum_command __command [read]

Initial value:

 {
        .name = "md5sum",
        .exec = md5sum_exec,
}

Definition at line 112 of file digest_cmd.c.