diggsweden/eudiw-wallet-issuer-poc
Oct 2025 – Oct 2025
1 Month active
Languages Used
JavaJavaScriptYAML
Technical Skills
API SecurityBackend DevelopmentConfiguration ManagementJOSEJUnitJWT
Christoffer Killander
PROFILE
Christoffer Killander
Christoffer Killander enhanced the diggsweden/eudiw-wallet-issuer-poc by delivering security-focused features for credential issuance. He implemented JWT signature verification for incoming credential requests, ensuring message integrity and authenticity using Java and Spring Boot. To further strengthen security, he introduced a CertificateValidationService that validates JWTs’ root certificate authorities via the x5c header, leveraging PKI and PKCS#12 keystores for PKIX validation. He also improved the development and testing environment by refactoring JUnit tests, updating configuration management, and refining JWT claim handling. These contributions established a robust foundation for secure, scalable credential issuance and streamlined both deployment and testing workflows.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
3Total
Bugs
0
Commits
3
Features
3
Lines of code
991
Activity Months1
Your Network
12 people
Work History
October 2025
3 Commits • 3 Features
Oct 1, 2025In October 2025, delivered security-critical credentials issuance enhancements for the diggsweden/eudiw-wallet-issuer-poc, focusing on JWT integrity, PKI-based validation, and testing/DevEx improvements. Implemented JWT signature verification for incoming credential requests with dedicated tests; introduced CertificateValidationService to verify root CA for JWTs using x5c header, PKIX validation from a PKCS#12 keystore, and integrated it with CredentialController. Refined development and testing environment: test refactors for CredentialController, environment config updates, Swagger UI access adjustments, and JWT claim handling improvements to boost test coverage. Result: stronger security posture, reliable credential issuance, and a solid foundation for PKI-backed validation that scales with deployments.
3 Commits • 3 Features
Oct 1, 2025In October 2025, delivered security-critical credentials issuance enhancements for the diggsweden/eudiw-wallet-issuer-poc, focusing on JWT integrity, PKI-based validation, and testing/DevEx improvements. Implemented JWT signature verification for incoming credential requests with dedicated tests; introduced CertificateValidationService to verify root CA for JWTs using x5c header, PKIX validation from a PKCS#12 keystore, and integrated it with CredentialController. Refined development and testing environment: test refactors for CredentialController, environment config updates, Swagger UI access adjustments, and JWT claim handling improvements to boost test coverage. Result: stronger security posture, reliable credential issuance, and a solid foundation for PKI-backed validation that scales with deployments.
October 2025
Activity
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Quality Metrics
Correctness86.6%
Maintainability83.4%
Architecture83.4%
Performance73.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaJavaScriptYAML
Technical Skills
API SecurityBackend DevelopmentConfiguration ManagementJOSEJUnitJWTJWT ValidationJavaPKISecuritySpring BootTesting
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