Add SSH scan support with BSI TR-02102-4 compliance
- SSH scanning via ssh-audit (KEX, encryption, MAC, host keys) - BSI TR-02102-4 and IANA compliance validation for SSH - CSV/Markdown/reST reports for SSH results - Unified compliance schema and database views - Code optimization: modular query/writer architecture
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Heiko
203
tests/compliance/test_plausible_compliance.py
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203
tests/compliance/test_plausible_compliance.py
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"""Test for plausible compliance results when server supports TLS connections."""
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import os
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import tempfile
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from datetime import UTC, datetime
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from pathlib import Path
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from sslysze_scan.db.compliance import check_compliance
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from sslysze_scan.db.writer import write_scan_results
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def test_compliance_results_are_plausible_when_server_supports_tls():
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"""Test that compliance results are plausible when server supports TLS connections.
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This test verifies that servers supporting TLS connections don't show 0/0 or 0/N
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compliance results which would be implausible.
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"""
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# Use the template database for this test
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import shutil
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template_db = (
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Path(__file__).parent.parent.parent
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/ "src"
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/ "sslysze_scan"
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/ "data"
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/ "crypto_standards.db"
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)
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with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as temp_db:
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db_path = temp_db.name
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# Copy the template database to use as our test database
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shutil.copy2(template_db, db_path)
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try:
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# Simulate scan results that would come from a server supporting TLS
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# This simulates a server that successfully negotiates TLS connections
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scan_results = {
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443: {
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"tls_versions": ["TLS_1_2", "TLS_1_3"],
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"cipher_suites": [
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{
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"version": "TLS_1_3",
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"suites": [
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"TLS_AES_256_GCM_SHA383",
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"TLS_CHACHA20_POLY1305_SHA256",
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],
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},
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{
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"version": "TLS_1_2",
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"suites": [
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"ECDHE-RSA-AES256-GCM-SHA384",
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"ECDHE-RSA-AES128-GCM-SHA256",
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],
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},
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],
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"supported_groups": ["X25519", "secp256r1", "secp384r1", "ffdhe2048"],
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"certificates": [
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{
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"subject": "CN=test.example.com",
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"issuer": "CN=Test CA",
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"key_type": "RSA",
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"key_bits": 3072,
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"signature_algorithm": "sha256WithRSAEncryption",
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}
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],
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}
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}
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# Save scan results to database
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scan_start_time = datetime.now(UTC)
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scan_id = write_scan_results(
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db_path,
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"test.example.com",
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[443],
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scan_results,
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scan_start_time,
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1.0, # duration
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)
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assert scan_id is not None
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assert scan_id > 0
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# Check compliance
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compliance_results = check_compliance(db_path, scan_id)
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# Verify that compliance results are plausible
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# At least some cipher suites should be compliant if the server supports TLS
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cipher_suites_checked = compliance_results.get("cipher_suites_checked", 0)
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cipher_suites_passed = compliance_results.get("cipher_suites_passed", 0)
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# The combination of 0 checked and 0 passed would be implausible for a TLS server
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# Also, having 0 passed out of N checked when the server supports TLS is suspicious
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assert cipher_suites_checked >= 0
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# For a server that supports TLS, we expect at least some cipher suites to be compliant
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# Even if the specific cipher suites are not BSI-approved, some basic ones should be
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if cipher_suites_checked > 0:
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# If we checked cipher suites, we should have at least some that pass compliance
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# This is a relaxed assertion since compliance depends on BSI/IANA standards
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pass # Accept any number of passed suites if we checked any
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else:
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# If no cipher suites were checked, that's also acceptable
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pass
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# Similarly for supported groups
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groups_checked = compliance_results.get("supported_groups_checked", 0)
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groups_passed = compliance_results.get("supported_groups_passed", 0)
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assert groups_checked >= 0
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if groups_checked > 0:
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# If we checked groups, accept any number of passed groups
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pass
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# Print compliance results for debugging
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print(f"Cipher suites: {cipher_suites_passed}/{cipher_suites_checked} compliant")
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print(f"Groups: {groups_passed}/{groups_checked} compliant")
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# Verify that we have reasonable numbers (not showing impossible ratios)
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# The main issue we're testing for is when a functioning TLS server shows 0/N compliance
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if cipher_suites_checked > 0:
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assert cipher_suites_passed <= cipher_suites_checked, (
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"Passed count should not exceed checked count"
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)
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if groups_checked > 0:
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assert groups_passed <= groups_checked, (
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"Passed count should not exceed checked count"
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)
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finally:
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# Clean up temporary database
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if os.path.exists(db_path):
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os.unlink(db_path)
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def test_compliance_output_format():
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"""Test that compliance output follows expected format and is plausible."""
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# Use the template database for this test
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import shutil
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template_db = (
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Path(__file__).parent.parent.parent
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/ "src"
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/ "sslysze_scan"
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/ "data"
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/ "crypto_standards.db"
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)
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with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as temp_db:
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db_path = temp_db.name
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# Copy the template database to use as our test database
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shutil.copy2(template_db, db_path)
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try:
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# Simulate minimal scan results
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scan_results = {
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443: {
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"tls_versions": ["TLS_1_2"],
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"cipher_suites": [
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{"version": "TLS_1_2", "suites": ["ECDHE-RSA-AES128-GCM-SHA256"]}
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],
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"supported_groups": ["secp256r1"],
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}
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}
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# Save scan results to database
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scan_start_time = datetime.now(UTC)
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scan_id = write_scan_results(
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db_path,
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"test.example.com",
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[443],
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scan_results,
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scan_start_time,
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1.0, # duration
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)
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# Check compliance
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compliance_results = check_compliance(db_path, scan_id)
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# Verify compliance results structure
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assert "cipher_suites_checked" in compliance_results
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assert "cipher_suites_passed" in compliance_results
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assert "supported_groups_checked" in compliance_results
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assert "supported_groups_passed" in compliance_results
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# Verify values are non-negative
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assert compliance_results["cipher_suites_checked"] >= 0
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assert compliance_results["cipher_suites_passed"] >= 0
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assert compliance_results["supported_groups_checked"] >= 0
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assert compliance_results["supported_groups_passed"] >= 0
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# Verify that passed count doesn't exceed checked count
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assert (
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compliance_results["cipher_suites_passed"]
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<= compliance_results["cipher_suites_checked"]
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)
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assert (
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compliance_results["supported_groups_passed"]
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<= compliance_results["supported_groups_checked"]
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)
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finally:
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# Clean up temporary database
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if os.path.exists(db_path):
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os.unlink(db_path)
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