Add Security Rules for Detecting RC2 and RC4 Cryptographic Algorithms #127
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WalkthroughThis pull request introduces new security rules for detecting the use of deprecated cryptographic algorithms RC2 and RC4 in Java applications. The changes include adding YAML configuration files for rule definitions, test cases, and snapshots to identify and prevent the usage of these vulnerable cryptographic methods. The rules are designed to warn developers about potential security risks associated with RC2 and RC4 ciphers, recommending more secure alternatives like AES. Changes
Sequence DiagramsequenceDiagram
participant Developer
participant CodeAnalyzer
participant CryptoRule
Developer->>CodeAnalyzer: Writes Java code
CodeAnalyzer->>CryptoRule: Analyze cipher usage
CryptoRule-->>CodeAnalyzer: Detect RC2/RC4 usage
CodeAnalyzer-->>Developer: Warn about insecure cryptographic method
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Actionable comments posted: 5
🧹 Nitpick comments (7)
tests/java/use-of-rc4-java-test.yml (1)
1-9: Enhance test coverage with additional RC4 test cases.Consider adding test cases for:
- Case variations: "rc4", "Rc4"
- RC4 with different modes/padding
- Dynamic string construction (e.g., "R" + "C4")
id: use-of-rc4-java valid: - | Cipher.getInstance("AES/CBC/PKCS7PADDING"); invalid: - | Cipher.getInstance("RC4"); - | useCipher(Cipher.getInstance("RC4")); + - | + Cipher.getInstance("rc4"); + - | + Cipher.getInstance("Rc4"); + - | + Cipher.getInstance("RC4/ECB/NoPadding"); + - | + String algo = "R" + "C4"; + Cipher.getInstance(algo);tests/java/use-of-rc2-java-test.yml (1)
39-39: Add newline at end of file.Add a newline character at the end of the file to comply with POSIX standards.
🧰 Tools
🪛 yamllint (1.35.1)
[error] 39-39: no new line character at the end of file
(new-line-at-end-of-file)
rules/java/security/use-of-rc4-java.yml (1)
32-32: Fix YAML formatting issues.Remove trailing spaces and extra blank lines to improve readability.
Also applies to: 35-35, 42-42
🧰 Tools
🪛 yamllint (1.35.1)
[error] 32-32: trailing spaces
(trailing-spaces)
rules/java/security/use-of-rc2-java.yml (1)
15-88: Fix YAML indentation.Multiple indentation issues were detected. Please use consistent indentation:
- 2 spaces for top-level keys
- 4 spaces for nested keys
- 6 spaces for deeply nested keys
🧰 Tools
🪛 yamllint (1.35.1)
[warning] 15-15: wrong indentation: expected 6 but found 4
(indentation)
[warning] 18-18: wrong indentation: expected 9 but found 7
(indentation)
[warning] 22-22: wrong indentation: expected 9 but found 7
(indentation)
[warning] 27-27: wrong indentation: expected 9 but found 7
(indentation)
[warning] 31-31: wrong indentation: expected 12 but found 10
(indentation)
[warning] 35-35: wrong indentation: expected 12 but found 10
(indentation)
[warning] 36-36: wrong indentation: expected 13 but found 12
(indentation)
[warning] 40-40: wrong indentation: expected 6 but found 4
(indentation)
[warning] 43-43: wrong indentation: expected 9 but found 7
(indentation)
[warning] 47-47: wrong indentation: expected 9 but found 7
(indentation)
[warning] 52-52: wrong indentation: expected 9 but found 7
(indentation)
[warning] 55-55: wrong indentation: expected 10 but found 8
(indentation)
[warning] 59-59: wrong indentation: expected 11 but found 10
(indentation)
[warning] 60-60: wrong indentation: expected 13 but found 12
(indentation)
[warning] 65-65: wrong indentation: expected 12 but found 10
(indentation)
[warning] 68-68: wrong indentation: expected 13 but found 12
(indentation)
[warning] 71-71: wrong indentation: expected 12 but found 14
(indentation)
[error] 78-78: trailing spaces
(trailing-spaces)
[warning] 79-79: wrong indentation: expected 22 but found 20
(indentation)
[error] 82-82: trailing spaces
(trailing-spaces)
[warning] 85-85: wrong indentation: expected 3 but found 2
(indentation)
[warning] 87-87: wrong indentation: expected 2 but found 4
(indentation)
tests/__snapshots__/use-of-rc2-java-snapshot.yml (3)
30-41: Improve error handling in test caseWhile exception handling is present, using
printStackTrace()is not recommended as it:
- Writes to stderr which may interfere with test output
- Cannot be easily captured or verified in tests
- Doesn't follow best practices for error handling
Consider using a more appropriate error handling approach for test cases.
public void testRC2InSwitch() { String algorithm = "RC2"; switch (algorithm) { case "RC2": try { Cipher.getInstance(algorithm); } catch (Exception e) { - e.printStackTrace(); + throw new RuntimeException("Failed to get RC2 cipher instance", e); } break; } }
146-147: Maintain consistency in exception handlingFor consistency with other test cases, these snippets should also include proper exception handling.
-useCipher(Cipher.getInstance("RC2")); -Cipher.getInstance("RC2"); +try { + useCipher(Cipher.getInstance("RC2")); + Cipher.getInstance("RC2"); +} catch (NoSuchAlgorithmException | NoSuchPaddingException e) { + throw new RuntimeException("Failed to get RC2 cipher instance", e); +}
1-168: Consider restructuring test cases for better organizationWhile the test cases effectively cover different patterns of RC2 usage, consider:
- Grouping related test cases (e.g., direct usage, map usage, switch usage)
- Using a consistent approach to exception handling across all test cases
- Adding negative test cases to verify rule doesn't trigger on valid cipher usage
Would you like me to propose a restructured version of these test cases?
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📒 Files selected for processing (6)
rules/java/security/use-of-rc2-java.yml(1 hunks)rules/java/security/use-of-rc4-java.yml(1 hunks)tests/__snapshots__/use-of-rc2-java-snapshot.yml(1 hunks)tests/__snapshots__/use-of-rc4-java-snapshot.yml(1 hunks)tests/java/use-of-rc2-java-test.yml(1 hunks)tests/java/use-of-rc4-java-test.yml(1 hunks)
🧰 Additional context used
🪛 yamllint (1.35.1)
rules/java/security/use-of-rc4-java.yml
[error] 32-32: trailing spaces
(trailing-spaces)
[error] 35-35: trailing spaces
(trailing-spaces)
[warning] 42-42: too many blank lines
(1 > 0) (empty-lines)
tests/java/use-of-rc2-java-test.yml
[error] 39-39: no new line character at the end of file
(new-line-at-end-of-file)
rules/java/security/use-of-rc2-java.yml
[warning] 15-15: wrong indentation: expected 6 but found 4
(indentation)
[warning] 18-18: wrong indentation: expected 9 but found 7
(indentation)
[warning] 22-22: wrong indentation: expected 9 but found 7
(indentation)
[warning] 27-27: wrong indentation: expected 9 but found 7
(indentation)
[warning] 31-31: wrong indentation: expected 12 but found 10
(indentation)
[warning] 35-35: wrong indentation: expected 12 but found 10
(indentation)
[warning] 36-36: wrong indentation: expected 13 but found 12
(indentation)
[warning] 40-40: wrong indentation: expected 6 but found 4
(indentation)
[warning] 43-43: wrong indentation: expected 9 but found 7
(indentation)
[warning] 47-47: wrong indentation: expected 9 but found 7
(indentation)
[warning] 52-52: wrong indentation: expected 9 but found 7
(indentation)
[warning] 55-55: wrong indentation: expected 10 but found 8
(indentation)
[warning] 59-59: wrong indentation: expected 11 but found 10
(indentation)
[warning] 60-60: wrong indentation: expected 13 but found 12
(indentation)
[warning] 65-65: wrong indentation: expected 12 but found 10
(indentation)
[warning] 68-68: wrong indentation: expected 13 but found 12
(indentation)
[warning] 71-71: wrong indentation: expected 12 but found 14
(indentation)
[error] 78-78: trailing spaces
(trailing-spaces)
[warning] 79-79: wrong indentation: expected 22 but found 20
(indentation)
[error] 82-82: trailing spaces
(trailing-spaces)
[warning] 85-85: wrong indentation: expected 3 but found 2
(indentation)
[warning] 87-87: wrong indentation: expected 2 but found 4
(indentation)
🔇 Additional comments (4)
tests/__snapshots__/use-of-rc4-java-snapshot.yml (1)
1-24: LGTM! Snapshots correctly capture the test cases.The snapshots are well-structured with appropriate primary/secondary labels and accurate position information.
rules/java/security/use-of-rc4-java.yml (1)
1-42: LGTM! Well-structured rule with comprehensive detection patterns.The rule effectively detects RC4 usage with informative messages and proper references.
🧰 Tools
🪛 yamllint (1.35.1)
[error] 32-32: trailing spaces
(trailing-spaces)
[error] 35-35: trailing spaces
(trailing-spaces)
[warning] 42-42: too many blank lines
(1 > 0) (empty-lines)
rules/java/security/use-of-rc2-java.yml (1)
13-88: LGTM! Comprehensive pattern matching for RC2 detection.The rule effectively detects both direct RC2 usage and instances with local variables.
🧰 Tools
🪛 yamllint (1.35.1)
[warning] 15-15: wrong indentation: expected 6 but found 4
(indentation)
[warning] 18-18: wrong indentation: expected 9 but found 7
(indentation)
[warning] 22-22: wrong indentation: expected 9 but found 7
(indentation)
[warning] 27-27: wrong indentation: expected 9 but found 7
(indentation)
[warning] 31-31: wrong indentation: expected 12 but found 10
(indentation)
[warning] 35-35: wrong indentation: expected 12 but found 10
(indentation)
[warning] 36-36: wrong indentation: expected 13 but found 12
(indentation)
[warning] 40-40: wrong indentation: expected 6 but found 4
(indentation)
[warning] 43-43: wrong indentation: expected 9 but found 7
(indentation)
[warning] 47-47: wrong indentation: expected 9 but found 7
(indentation)
[warning] 52-52: wrong indentation: expected 9 but found 7
(indentation)
[warning] 55-55: wrong indentation: expected 10 but found 8
(indentation)
[warning] 59-59: wrong indentation: expected 11 but found 10
(indentation)
[warning] 60-60: wrong indentation: expected 13 but found 12
(indentation)
[warning] 65-65: wrong indentation: expected 12 but found 10
(indentation)
[warning] 68-68: wrong indentation: expected 13 but found 12
(indentation)
[warning] 71-71: wrong indentation: expected 12 but found 14
(indentation)
[error] 78-78: trailing spaces
(trailing-spaces)
[warning] 79-79: wrong indentation: expected 22 but found 20
(indentation)
[error] 82-82: trailing spaces
(trailing-spaces)
[warning] 85-85: wrong indentation: expected 3 but found 2
(indentation)
[warning] 87-87: wrong indentation: expected 2 but found 4
(indentation)
tests/__snapshots__/use-of-rc2-java-snapshot.yml (1)
1-2: LGTM! File structure is well-defined.The snapshot file follows the correct format with appropriate rule ID.
Summary by CodeRabbit
New Features
Security Improvements
Tests