digest_cmd.c File Reference

Digest commands. More...

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include <ipxe/command.h>
#include <ipxe/parseopt.h>
#include <ipxe/image.h>
#include <ipxe/crypto.h>
#include <ipxe/md5.h>
#include <ipxe/sha1.h>
#include <usr/imgmgmt.h>

Go to the source code of this file.

Data Structures
struct	digest_options
	"digest" options More...

Functions
	FILE_LICENCE (GPL2_OR_LATER)
static int	digest_exec (int argc, char **argv, struct digest_algorithm *digest)
	The "digest" command. More...
static int	md5sum_exec (int argc, char **argv)
static int	sha1sum_exec (int argc, char **argv)

Variables
static struct option_descriptor	digest_opts [] = {}
	"digest" option list More...
static struct command_descriptor	digest_cmd
	"digest" command descriptor More...
struct command md5sum_command	__command

Detailed Description

Digest commands.

Definition in file digest_cmd.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER

)

digest_exec()

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	Return status code

Definition at line 59 of file digest_cmd.c.

                                                           {
        struct digest_options opts;
        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;
        int rc;

        /* Parse options */
        if ( ( rc = parse_options ( argc, argv, &digest_cmd, &opts ) ) != 0 )
                return rc;

        for ( i = optind ; i < argc ; i++ ) {

                /* Acquire image */
                if ( ( rc = imgacquire ( argv[i], 0, &image ) ) != 0 )
                        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;
}

References copy_from_user(), digest_algorithm::ctxsize, image::data, digest, digest_cmd, digest_algorithm::digestsize, imgacquire(), len, image::len, image::name, offset, optind, opts, parse_options(), printf(), and rc.

Referenced by md5sum_exec(), and sha1sum_exec().

md5sum_exec()

static int md5sum_exec ( int  argc, char **  argv  )

static

Definition at line 107 of file digest_cmd.c.

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

References digest_exec(), and md5_algorithm.

sha1sum_exec()

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

static

Definition at line 111 of file digest_cmd.c.

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

References digest_exec(), and sha1_algorithm.

Variable Documentation

digest_opts

struct option_descriptor digest_opts[] = {}

static

"digest" option list

Definition at line 44 of file digest_cmd.c.

digest_cmd

struct command_descriptor digest_cmd

static

Initial value:

=
        COMMAND_DESC ( struct digest_options, digest_opts, 1, MAX_ARGUMENTS,
                       "<image> [<image>...]" )

"digest" command descriptor

Definition at line 47 of file digest_cmd.c.

Referenced by digest_exec().

__command

struct command sha1sum_command __command

Initial value:

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

Definition at line 115 of file digest_cmd.c.