Kontron AM4150 U-Boot Bootloader - Manual (Page 24)

U-Boot Usage AM4150 U-Boot Bootloader
Page 24 ID 1052-5678, Rev. 1.0
P R E L I M I N A R Y
3.6 md5sum Command
md5sum
FUNCTION: Creates or checks the md5 message digest over a memory area
SYNTAX: md5sum <data-address> <length> [<cksum-address>]
where:
md5sum command
<data-address> parameter: hexadecimal
start address of memory area
<length> parameter: hexadecimal
length of memory area
<cksum-address> parameter:
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 3
rd
parameter <checksum-address> is omitted, the md5
message digest is calculated over the specified memory range and
printed to the console.
If the optional 3
rd
parameter <checksum-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 meant to be
used within scripts.
The md5 message digest at <cksum-address> may be specified in
ASCII or binary format.
USAGE: Calculate an md5 message digest
COMMAND / RESPONSE:
=> md5sum 100000 80000
8fe7006660a2df2265b7cd707eb98786
=>