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CICS VERIFY TOKEN - Verify Token

CICS VERIFY TOKEN verifies a user token, enabling token management and output processing in CICS environments. It provides efficient token verification capabilities for CICS applications.

What is CICS VERIFY TOKEN?

CICS VERIFY TOKEN verifies a user token, enabling token management and output processing. It provides efficient token verification capabilities, allowing applications to verify user tokens.

Command Syntax

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EXEC CICS VERIFY TOKEN
    USERID(user-id)
    TOKEN(token)
    [RESP(response-code)]
    [RESP2(response-code-2)]
END-EXEC.

Parameters Explained

USERID Parameter

Specifies the user ID to verify token for:

  • Must be a valid user ID
  • Identifies specific user
  • Required for all VERIFY TOKEN operations
  • Must be active user

TOKEN Parameter

Specifies the token to verify:

  • Must be a valid token
  • Contains token to verify
  • Required for all VERIFY TOKEN operations
  • Must match user token

RESP Parameters

Response codes returned by the command:

  • RESP: Primary response code
  • RESP2: Secondary response code
  • Always check these codes for command success
  • Handle command failures appropriately

Token Types

1. Basic Tokens

  • Basic tokens: Basic tokens
  • Mapped tokens: Mapped tokens
  • Unmapped tokens: Unmapped tokens
  • Custom tokens: Custom tokens

2. Advanced Tokens

  • Advanced tokens: Advanced tokens
  • Secure tokens: Secure tokens
  • Encrypted tokens: Encrypted tokens
  • Compressed tokens: Compressed tokens

3. Specialized Tokens

  • Specialized tokens: Specialized tokens
  • High-performance tokens: High-performance tokens
  • Low-latency tokens: Low-latency tokens
  • High-throughput tokens: High-throughput tokens

Implementation Example

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WORKING-STORAGE SECTION.
01 WS-RESPONSE            PIC S9(8) COMP.
01 WS-RESPONSE2           PIC S9(8) COMP.
01 WS-USER-ID             PIC X(8) VALUE 'USER001'.
01 WS-TOKEN               PIC X(16) VALUE 'TOKEN123456789'.
 
PROCEDURE DIVISION.
    * Verify user token
    EXEC CICS VERIFY TOKEN
        USERID(WS-USER-ID)
        TOKEN(WS-TOKEN)
        RESP(WS-RESPONSE)
        RESP2(WS-RESPONSE2)
    END-EXEC.
    
    IF WS-RESPONSE NOT EQUAL DFHRESP(NORMAL)
        EXEC CICS WRITE OPERATOR
            TEXT('VERIFY TOKEN command failed')
        END-EXEC
        EXEC CICS RETURN END-EXEC
    END-IF.
    
    * Token verified successfully
    * Continue processing

Token Processing

1. Token Preparation

Token preparation includes:

  • Token validation
  • Token formatting
  • Token encoding
  • Token processing

2. Token Transmission

Token transmission includes:

  • Token routing
  • Token delivery
  • Transmission confirmation
  • Error handling

3. Output Management

Output management includes:

  • User management
  • Output formatting
  • User experience
  • Performance optimization

Common Response Codes

Success Response Codes

  • NORMAL (0): Token verified successfully
  • VERIFY (4): Token verified

Error Response Codes

  • INVREQ (16): Invalid request
  • NOTFND (20): User not found
  • LENGERR (22): Length error
  • VERIFY (24): Verify error

Best Practices

1. Token Preparation

  • Prepare token appropriately
  • Validate token content
  • Handle different token types
  • Ensure token integrity

2. Error Handling

  • Check all response codes
  • Handle verify failures
  • Implement retry logic
  • Log error conditions

3. Performance Optimization

  • Minimize token verification
  • Use efficient token formats
  • Optimize user updates
  • Manage user resources

Explain It Like I'm 5 Years Old

Imagine you're checking if a secret code is correct:

When you want to check if a secret code is correct, you say the secret code and see if it matches what you're supposed to say. If the secret code matches, you can get into the secret club. If the secret code doesn't match, you can't get into the secret club.

CICS VERIFY TOKEN is like checking if a secret code is correct. The computer program says the token and sees if it matches what the user is supposed to say. If the token matches, the user can get into the system. If the token doesn't match, the user can't get into the system.

Just like you check if a secret code is correct, the computer program checks if a token is correct!

Exercises

Exercise 1: Token Verification

Write a CICS VERIFY TOKEN command to verify a user token.

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EXEC CICS VERIFY TOKEN
    USERID(WS-USER-ID)
    TOKEN(WS-TOKEN)
    RESP(WS-RESPONSE)
    RESP2(WS-RESPONSE2)
END-EXEC.

Exercise 2: Token Processing

How would you implement comprehensive token processing that handles different token types and requirements?

Answer: Identify different token types and appropriate handling, implement token validation and encoding, handle different token types and capabilities, implement proper error handling for token verification failures, optimize token verification for performance, and maintain token integrity throughout the process.

Quiz

Question 1

What is the primary purpose of CICS VERIFY TOKEN?

Answer: B) To verify a user token

Question 2

Which parameter specifies the user ID to verify token for?

Answer: A) USERID

Related Concepts

CICS Token Processing

Token processing and output in CICS

CICS User Management

User management and user interaction in CICS

CICS Output Processing

Output processing and token display in CICS