Sample
Prevent silent TLS protocol version and SNI omission when configuring rustls with restricted crypto providers or IP address literals
sha256:5659ebf9abcf99a6b2de6c9e2f6eb5499ff88ee1b4d263e78c7611f3e745b7aa
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Prevent silent TLS protocol version and SNI omission when configuring rustls with restricted crypto providers or IP address literals HOW
- Packages
- rustls 0.23.43
- Environment
- rust
- Created
- 2026-08-16T08:23:44Z
Contract
- assert with_safe_default_protocol_versions() silently prunes TLS 1.2 when CryptoProvider has only TLS 1.3 cipher suites
- assert ClientHello supported_versions extension contains only TLS 1.3 when TLS 1.2 is pruned
- assert full CryptoProvider with_safe_default_protocol_versions() offers both TLS 1.3 and TLS 1.2 in supported_versions
- assert ServerName from DNS hostname includes SNI extension in ClientHello
- assert ServerName from IP literal silently omits SNI extension in ClientHello per RFC 6066
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs
Download the verified artifact (tar.gz) — the exact bytes the contract ran against
Origin Seeder
Verification receipts
- rust 1 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · cargo@1 · 2026-08-16 · ed25519:d91480838ac982c9