pdftract/notes/bf-6d973-child-1.md

SSRF_BLOCKED Assertion Helper Verification

Task: Verify SSRF_BLOCKED assertion helper implementation
Date: 2026-07-06
Status: ✅ PASS

Findings

1. Helper Function Exists

The assert_ssrf_blocked_error function is implemented in:

• File: /home/coding/pdftract/crates/pdftract-cli/tests/TH-05-ssrf-block.rs
• Lines: 472-518

2. Function Validates Error Structure

The function correctly checks:

Error Response Structure (lines 477-482)

let error = parsed
    .get("error")
    .expect(&format!(
        "Response should be an error for {}, got: {}",
        test_description, response_json
    ));

✅ Verifies response has an "error" field (not a result)

SSRF_BLOCKED in data.code OR message (lines 485-497)

// Check if error data contains "code": "SSRF_BLOCKED"
let has_ssrf_blocked_code = error
    .get("data")
    .and_then(|data| data.get("code"))
    .and_then(|code| code.as_str())
    .map(|code| code == "SSRF_BLOCKED")
    .unwrap_or(false);

// Check if error message contains SSRF_BLOCKED
let error_message = error
    .get("message")
    .and_then(|m| m.as_str())
    .unwrap_or("");
let has_ssrf_in_message = error_message.contains("SSRF_BLOCKED");

✅ Checks both data.code == "SSRF_BLOCKED" and message contains "SSRF_BLOCKED"

Error Code Validation (lines 507-517)

let error_code = error
    .get("code")
    .and_then(|c| c.as_i64())
    .expect("Error should have a numeric code");

// Error code should be in the server error range or the specific SSRF blocked code
assert!(
    error_code == SSRF_BLOCKED_CODE || (-32099..=-32000).contains(&error_code),
    "Error code {} for {} should be SSRF_BLOCKED_CODE or in server error range",
    error_code, test_description
);

✅ Validates error code is SSRF_BLOCKED_CODE (-32001) or in server error range (-32099..=-32000)

3. Function is Used by Tests

The helper is used by 7 test cases:

• test_ipv4_loopback_blocked (line 229)
• test_ipv4_wildcard_blocked (line 266)
• test_cloud_metadata_blocked (line 303)
• test_rfc1918_private_blocked (line 340)
• test_ipv6_loopback_blocked (line 377)
• test_http_scheme_rejected (line 555)
• test_no_network_connection_attempted (line 616)

4. Additional Helper Function

There's also a companion function assert_ssrf_blocked_or_stub (lines 402-460) that:

• Accepts stub responses (with _note field) for Phase 1.8 incomplete implementation
• Provides clear WARNING output when stub is detected
• Used by no current tests (strict validation is preferred)

Acceptance Criteria Status

Criterion	Status	Details
assert_ssrf_blocked_error function exists	✅ PASS	Lines 472-518 in CLI test file
Validates error structure	✅ PASS	Checks for "error" field, not "result"
Validates error code range	✅ PASS	Checks SSRF_BLOCKED_CODE (-32001) or -32099..=-32000
Validates SSRF_BLOCKED presence	✅ PASS	Checks data.code OR message for "SSRF_BLOCKED"
Test file compiles	⏳ PENDING	Compilation in progress

Compilation Status

✅ Compilation PASSED

Ran cargo build --tests --message-format=short - successful compilation of:

• pdftract-cli crate containing TH-05-ssrf-block.rs
• assert_ssrf_blocked_error function compiles without errors
• Only warning is unrelated unused function (extract_error_message)

Conclusion

The SSRF_BLOCKED assertion helper is correctly implemented with:

• ✅ Proper error structure validation
• ✅ Error code range validation (-32099..=-32000 or -32001)
• ✅ SSRF_BLOCKED presence check in data.code OR message
• ✅ Clear error messages for debugging
• ✅ Used by 7 test cases covering all SSRF payload categories
• ✅ Compiles successfully

Overall Result: PASS