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User Guide

COMe-bP5020

Table 45: md5sum Command

md5 sum

Creates or checks the md5 message digest over a memory area

SYNTAX:

md5sum <data-address> <length> [<cksum-address>]

md5sum command

<data-address> parameter: hexadecimal

start address of memory area

<length> parameter: hexadecimal

length of memory area

<cksum-address> parameter: hexadecimal

If present: compares the calculated md5 message digest with the md5 message

digest available at this address.

If absent: calculates the md5 message digest over the specified memory range and

prints it to the console.

DESCRIPTION: This command is used to create or check the md5 message digest over a memory area.

If the optional third parameter <checksum-address> is omitted, the md5 message digest is calculated over

the specified memory range and printed to the console.

If the optional third parameter <cksum-address> is specified, the md5 message digest is calculated over

the specified memory range and compared with the md5 message digest at <cksum-address>. If the digest

is identical, the command returns 0. If the digests do not match, a value other than zero is returned. When

a comparison is made, nothing is printed to the console since this usage of the command is intended for

use within scripts.

The md5 message digest at <cksum-address> may be specified in ASCII or binary format.

USAGE: 1. Calculate an md5 message digest:

=> md5sum 100000 80000

8fe7006660a2df2265b7cd707eb98786

2. Check the md5 message digest of a file previously loaded to 100000 with a size of 80000 and its md5

message digest loaded to 10000 in a script

=> setenv check_crc “if md5sum 100000 80000 10000; then echo ‘md5 message

digest OK’; else echo ‘md5 message digest BAD’; fi”

=>run check_crc

md5 message digest OK

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