Cisco CRS User Manual

sam verify
To use the Message Digest 5 (MD5) hash algorithm to verify the integrity of the software component on a
flash memory card and ensure that it has not been tampered with during transit, use the sam verify command.
sam verify {location| file-system} {MD5| SHA [ digest ]}
Syntax Description
Name of the flash memory card slot, either disk0 or disk1.
location
Absolute path to the file to be verified.
file-system
Specifies a one-way hashing algorithm to generate a 128-bit hash (or message digest)
of the specified software component.
MD5
Specifies the Secure Hash Algorithm, a hashing algorithm that takes a message of
less than 264 bits in length and produces a 160-bit message digest. The large message
digest provides security against brute-force collision and inversion attacks.
SHA
(Optional) Message digest generated by the hashing algorithm, to be compared in
determining the integrity of the software component.
digest
Command Default
None
Command Modes
EXEC
Command History
ModificationRelease
This command was introduced.Release 2.0
Usage Guidelines
Use the sam verify command to generate a message digest for a given device. The message digest is useful
for determining whether software on a flash memory card has been tampered with during transit. The command
generates a hash code that can be used to compare the integrity of the software between the time it was shipped
and the time you received it.
For example, if you are given a flash memory card with preinstalled software and a previously generated MD5
message digest, you can verify the integrity of the software using the sam verify command:
sam verify device MD5 digest
The device argument specifies the flash device. The digest argument specifies the message digest supplied
by the originator of the software.
If the message digest matches the message digest generated by the sam verify command, the software
component is valid.
Cisco IOS XR System Security Command Reference for the Cisco CRS Router, Release 4.1
240 OL-24740-01
Software Authentication Manager Commands
sam verify

Cisco CRS Specifications

General

Operating System	Cisco IOS XR
Product Type	Core Router
Form Factor	Modular Chassis
Dimensions	Varies by chassis type
Weight	Varies by chassis type
Architecture	Distributed
Switch Fabric	Multi-stage
Interface Support	Ethernet, SONET/SDH, OTN
Interfaces/Ports	Varies by line card
Port Density	Varies by line card
Routing Protocol	BGP, IS-IS, OSPF, MPLS
Management	CLI, SNMP
Power Supply	Redundant, hot-swappable
Cooling	Redundant, Hot-swappable Fan Trays
Supported Protocols	IPv4, IPv6, MPLS
Management Interfaces	Ethernet, console
Security Features	ACLs