Add security rules for deprecated Triple DES and ECB mode detection #120
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WalkthroughThis pull request introduces two new security-focused rules for Java cryptographic operations. The first rule detects the deprecated usage of Triple DES (DESede) encryption, while the second rule identifies the use of Electronic Codebook (ECB) mode in cipher implementations. Both rules are designed to guide developers towards more secure cryptographic practices by flagging potentially vulnerable encryption methods. The changes include rule definitions, test cases, and snapshot configurations to validate the detection of insecure cryptographic implementations. Changes
Sequence DiagramsequenceDiagram
participant Dev as Developer
participant Rule as Security Rule
participant Cipher as Cryptographic Implementation
Dev->>Cipher: Implement Encryption
Cipher-->>Rule: Check Encryption Method
alt Deprecated/Insecure Method
Rule->>Dev: Warning: Insecure Cryptographic Practice
Rule->>Dev: Recommend Secure Alternative (e.g., AES/GCM)
else Secure Method
Rule->>Cipher: Approve Implementation
end
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Actionable comments posted: 5
🧹 Nitpick comments (6)
tests/java/ecb-cipher-java-test.yml (1)
5-7: Consider adding more ECB pattern variations.While the current invalid test case correctly identifies basic ECB usage, consider adding more variations to catch different patterns:
- Different key sizes (e.g., "AES_128/ECB/NoPadding")
- Different padding schemes (e.g., "AES/ECB/PKCS5Padding")
- Legacy providers (e.g., "AES/ECB/NoPadding", "SunJCE")
tests/java/desede-is-deprecated-java-test.yml (1)
9-10: Consider expanding DES/DESede test cases.While the current test cases cover basic usage, consider adding:
- Different modes (CBC, CFB)
- Different key sizes for DESede
- Different padding schemes
- Legacy provider specifications
Also, fix the trailing whitespace on line 10.
🧰 Tools
🪛 yamllint (1.35.1)
[error] 10-10: trailing spaces
(trailing-spaces)
rules/java/security/ecb-cipher-java.yml (1)
4-8: Enhance the security message with mitigation strategies.While the current message explains the risks well, it would be helpful to provide specific alternatives:
message: >- Cipher in ECB mode is detected. ECB mode produces the same output for the same input each time which allows an attacker to intercept and replay the data. Further, ECB mode does not provide any integrity checking. See - https://find-sec-bugs.github.io/bugs.htm#CIPHER_INTEGRITY. + https://find-sec-bugs.github.io/bugs.htm#CIPHER_INTEGRITY. + + Consider using AES/GCM/NoPadding instead, which provides both + confidentiality and authenticity. Alternative secure modes include + CBC with proper IV handling or CTR mode with proper nonce handling.tests/__snapshots__/desede-is-deprecated-java-snapshot.yml (2)
3-26: Enhance test coverage for DESede detectionThe snapshot correctly captures DESede usage with ECB mode. Consider adding additional test cases for:
- Other common DESede modes (CBC, CFB, OFB)
- Different padding schemes
- Various case variations (e.g., "DESEDE", "DesEde")
This will ensure comprehensive detection of all Triple DES variants.
27-40: Consider separating DES and DESede rulesThe snapshot includes a test for plain DES, which is even weaker than Triple DES. Consider:
- Creating a separate rule for DES detection
- Adjusting the severity levels (DES should be "error" while DESede could be "warning")
rules/java/security/desede-is-deprecated-java.yml (1)
48-50: Fix YAML formatting issuesRemove trailing spaces and extra blank lines at the end of the file.
- - - - +🧰 Tools
🪛 yamllint (1.35.1)
[error] 48-48: trailing spaces
(trailing-spaces)
[error] 49-49: trailing spaces
(trailing-spaces)
[warning] 50-50: too many blank lines
(1 > 0) (empty-lines)
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📒 Files selected for processing (6)
rules/java/security/desede-is-deprecated-java.yml(1 hunks)rules/java/security/ecb-cipher-java.yml(1 hunks)tests/__snapshots__/desede-is-deprecated-java-snapshot.yml(1 hunks)tests/__snapshots__/ecb-cipher-java-snapshot.yml(1 hunks)tests/java/desede-is-deprecated-java-test.yml(1 hunks)tests/java/ecb-cipher-java-test.yml(1 hunks)
✅ Files skipped from review due to trivial changes (1)
- tests/snapshots/ecb-cipher-java-snapshot.yml
🧰 Additional context used
🪛 yamllint (1.35.1)
tests/java/desede-is-deprecated-java-test.yml
[error] 10-10: trailing spaces
(trailing-spaces)
rules/java/security/desede-is-deprecated-java.yml
[warning] 18-18: wrong indentation: expected 26 but found 24
(indentation)
[warning] 21-21: wrong indentation: expected 26 but found 24
(indentation)
[warning] 35-35: wrong indentation: expected 18 but found 12
(indentation)
[warning] 36-36: wrong indentation: expected 20 but found 18
(indentation)
[warning] 40-40: wrong indentation: expected 20 but found 18
(indentation)
[error] 48-48: trailing spaces
(trailing-spaces)
[error] 49-49: trailing spaces
(trailing-spaces)
[warning] 50-50: too many blank lines
(1 > 0) (empty-lines)
🔇 Additional comments (1)
tests/java/ecb-cipher-java-test.yml (1)
3-4: LGTM! Secure cipher configuration in valid test case.
The valid test case correctly uses AES with GCM mode, which provides both confidentiality and authenticity. This is a strong choice for the positive test case.
Summary by CodeRabbit
New Features
Tests