February 2026 SAP/SapMachine monthly summary focused on improving Keystore error handling under security policy constraints and expanding test coverage to ensure clear messaging for disabled keystore formats.

Month: 2026-01 | OpenJDK Leyden Focused on stabilizing crypto configuration handling and improving reliability of JCE disabled algorithms processing to reduce runtime crypto-related failures in deployments.

December 2025: Security hardening in the SAP/SapMachine cryptography subsystem focused on robust salts, secure salts generation, and stronger key derivation. Implemented utilities to detect weak salts, generate secure salts for PBEWithMD5AndTripleDES, and increased key derivation iteration counts to meet contemporary security standards. This work reduces risk, improves compliance, and enhances long-term maintainability.

OpenJDK Leyden - October 2025: Delivered a robustness upgrade for cipher transformation parsing. Refactor now correctly handles extra slashes and algorithm names such as SHA512/2, ensuring invalid formats throw NoSuchAlgorithmException (not NoSuchPaddingException). Expanded unit tests to cover these error-handling scenarios and prevent regressions. The changes improve cryptographic configuration reliability, reduce runtime errors in production, and enhance security posture.

Month: 2025-09. Delivered security-focused crypto policy enforcement and clarified cryptographic API behavior in openjdk/leyden, driving stronger governance and more reliable runtime behavior. Highlights include feature delivery of CryptoAlgorithmConstraints and algorithm enforcement across cryptographic primitives, plus a bug fix clarifying Cipher.getInstance() exception semantics and updating tests.

OpenJDK Leyden, August 2025: PKCS11 stability and correctness improvements across native key management. Delivered a 64-bit CK_ULONG alignment fix and corrected ECDSA/EC parameter handling, with a targeted refactor of the PKCS11 attribute template to prioritize alignment-sensitive fields. These changes fix potential misinterpretation in parameter processing and reduce risk of crashes on 64-bit platforms.

July 2025 monthly summary for openjdk/leyden focusing on security hardening of cipher transformation validation and the accompanying test improvements. This period emphasizes robustness against misconfigurations in crypto transformations and strengthening auditability through explicit commit references.

May 2025 monthly summary for openjdk/leyden. Focused on delivering security- and standardization-oriented improvements in cryptographic handling, with two primary deliverables: a bug fix addressing PBE key encoding inconsistencies across SunJCE and SunPKCS11, and the adoption of a standardized KDF API to replace internal HKDF usage. The work improves cross-provider robustness, reduces potential misinterpretations of keys, aligns with industry standards, and enhances maintainability and testing coverage. These changes deliver tangible business value by improving security posture, interoperability, and reliability of cryptographic operations across security providers. Commits included: 6536430a3bdedcf5e0636e0eb27bde5e0d7b40fd; 4fc10a1e7e9483ecddbaaa9fb52c4db52de86cc8; 4c0a0ab6bc765c46d2c4b8320418d30abee24a91.

November 2024: Delivered ML-KEM parameter constants integration in openjdk/leyden. Added ML_KEM_512, ML_KEM_768, ML_KEM_1024 to NamedParameterSpec and comprehensive tests to verify their existence and consistency with existing constants, ensuring proper integration of ML-KEM functionalities within the security provider. Addressed alignment with ML-DSA integration changes, including handling of constants removal, and established regression tests to prevent reintroduction of issues.