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This commit implements JWS (JSON Web Signature) support for RATS Conceptual Message Wrapper (CMW) following Section 4.2 of draft-ietf-rats-msg-wrap and the pattern from CBOR signing (PR #16).

Features implemented:

  • JWS compact serialization with ES256 algorithm
  • CMW marshaling to JSON triple format [type, value, indicator]
  • Base64URL encoding/decoding without padding
  • JWS header creation with proper algorithm and content type
  • ES256 test key generation matching Go test vectors
  • CLI commands for signing and verification

Files added:

  • cmw-bash-jws.sh: Main bash implementation with JWS support
  • test-cmw-jws.sh: Comprehensive test suite (10 tests, all passing)
  • simple-jws-demo.sh: Simple end-to-end demonstration
  • jws-comprehensive-demo.sh: Detailed demonstration with multiple CMW types
  • JWS_README.md: Documentation and usage guide

Standards compliance:

  • RFC 7515 (JWS) compact serialization
  • ES256 algorithm (ECDSA using P-256 and SHA-256)
  • draft-ietf-rats-msg-wrap Section 4.2 for JSON CMW signing
  • Proper CMW triple format preservation

Test results:

  • All 10 JWS tests passing
  • All existing Go tests still passing
  • No regressions in existing functionality

@kallal79 kallal79 force-pushed the feature/jws-json-signing branch from d70e018 to a74474a Compare September 24, 2025 14:10
This commit implements JWS (JSON Web Signature) support for RATS
Conceptual Message Wrapper (CMW) following Section 4.2 of
draft-ietf-rats-msg-wrap and the pattern from CBOR signing (PR veraison#16).

Features implemented:
- JWS compact serialization with ES256 algorithm
- CMW marshaling to JSON triple format [type, value, indicator]
- Base64URL encoding/decoding without padding
- JWS header creation with proper algorithm and content type
- ES256 test key generation matching Go test vectors
- CLI commands for signing and verification

Files added:
- cmw-bash-jws.sh: Main bash implementation with JWS support
- test-cmw-jws.sh: Comprehensive test suite (10 tests, all passing)
- simple-jws-demo.sh: Simple end-to-end demonstration
- jws-comprehensive-demo.sh: Detailed demonstration with multiple CMW types
- JWS_README.md: Documentation and usage guide

Standards compliance:
- RFC 7515 (JWS) compact serialization
- ES256 algorithm (ECDSA using P-256 and SHA-256)
- draft-ietf-rats-msg-wrap Section 4.2 for JSON CMW signing
- Proper CMW triple format preservation

Test results:
- All 10 JWS tests passing
- All existing Go tests still passing
- No regressions in existing functionality

Note: ECDSA signature generation and verification use placeholder
implementations and require integration with cryptographic libraries
for production use.

Signed-off-by: Kallal Mukherjee <[email protected]>
@kallal79 kallal79 force-pushed the feature/jws-json-signing branch from 501fdb7 to 2585ffd Compare September 30, 2025 18:05
@kallal79
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Hi @yogeshbdeshpande @thomas-fossati @cowbon @deeglaze @iolivergithub @jraman567 Sir: PR #17 implements JWS signing for JSON CMW (Issue #15) with ES256 JWS, compact serialization, CLI signing/verification, tests and docs — please review and approve to unblock merging.

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