Trustworthy Systems Guide

Step 1

Send a request for a challenge using the request consent-token generate-challenge shell-access time-validity-slot command.

Example:

Device# request consent-token generate-challenge shell-access auth-timeout 900
zSSdrAAAAQEBAAQAAAABAgAEAAAAAAMACH86csUhmDl0BAAQ0Fvd7CxqRYUeoD7B4AwW7QUABAAAAG8GAAhDVEFfREVNTwcAGENUQV9ERU1PX0NUQV9TSUdOSU5HX0tFWQgAC0M5ODAwLUNMLUs5CQALOVpQUEVESE5KRkI=
Device#
*Jan 18 02:47:06.733: %CTOKEN-6-AUTH_UPDATE: Consent Token Update (challenge generation attempt: Shell access 0).

time-validity-slot : The duration in minutes for which you are requesting access to system shell.

In this example, the time period is 900 minutes after which the session expires.

The device generates a unique challenge as output. This challenge is a base-64 format string.

Step 2

Send the challenge string generated by the device to a Cisco Authorized Personnel through e-mail or Instant Message.

The Cisco Authorized Personnel processes the unique challenge string and generates a response. The response is also a base-64 string that is unique. The Cisco Authorized Personnel copies this response string and sends it to you through e-mail or Instant Message.

Step 3

Input the response string sent to you by the Cisco Authorized Personnel using the request consent-token accept-response shell-access response-string command.

Example:

Device# request consent-token accept-response shell-access lR1y2AAUKFcAAAABAAABYlVDZ2d6MnkxL3JxTTJSSC9FZE5aWnRSa1FteS9POWZqRUNlTk1LL3VoUWxTc0FsOHl5OW5vckQ4YWVOelpZZGYNCkNpWHY0b1B4Q000UGs1M2ZEMUpoazBCUkYyM3FML1A2ckVjM3paR05wdHcvck95UVduYUVuTnA5bnhIZ09CNE0NCjBmVjh4b3I4TzE3aHNMaU1JeDQ3YWtkdE9Xb0JhTmlzMVRweFBVZE93QUxvZDVEbmo4UEtiR01VVUM5b3lZWXQNCjFIRnJPbXczcmpsZTJHUnIxOWJUNkZLTWlpZ0ZmbENVRWo4K2xoaXgxS0ZtdDVPcDBYczVPSU43L0dSK1pGTnoNCmYxTUtjaW1OWDhWTTNLQ0ZWNURHU3pIenF1UFBxZVNDU0xLNkhXUTFROTlFMXJVakdlZ1NqTWxnNFlySkJYL0wNCnpaTDVVRnVFdWpRWDdDUThIdkVPM1E9PQ==
% Consent token authorization success
*Jan 18 02:51:37.807: %CTOKEN-6-AUTH_UPDATE: Consent Token Update (authentication success: Shell access 0).

Device# request platform software system shell
Activity within this shell can jeopardize the functioning of the system.
Are you sure you want to continue? [y/n] y
Device#
*Jan 18 02:56:59.714: %CTOKEN-6-AUTH_UPDATE: Consent Token Update (authorization for Shell access 0 will expire in 10 min).

If the challenge-response pair match, you are authorized to access system shell. If the challenge-response pair do not match, an error is displayed and you are required to repeat steps 1 to 3.

After you are authorized, you can access system shell for the requested time-slot.

The device sends a message when there is ten minutes remaining of the authorization session.

Step 4

When you finish accessing system shell, you can end the session using the request consent-token terminate-auth command. You can also force terminate the session prior to the authorization timeout using this command. The session also gets terminated automatically when the requested time slot expires.

Example:

Device# request consent-token terminate-auth
% Consent token authorization termination success

Device#
*Jan 18 23:33:02.937: %CTOKEN-6-AUTH_UPDATE: Consent Token Update (terminate authentication: Shell access 0).
Device#

Bias-Free Language

Book Title

Trustworthy Systems Guide

Chapter Title

Consent Token

Results

Chapter: Consent Token

Consent Token

Example:

Example:

Example:

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Trustworthy Systems Guide

Bias-Free Language

Results

Chapter: Consent Token

Consent Token

Consent Token

How consent token authorization works

Summary

Workflow

Consent token authorization process for system shell access

Procedure

Example:

Example:

Example:

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