Kontron AM4150 U-Boot Bootloader Manual do Utilizador descarregar pdf (Página 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

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

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

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 47 48

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