Sample
github.com/golang-jwt/jwt/v5 5.3.1: Distinguish between token signature validation failure and invalid key type configuration in jwt.Parse
Verified sample for golang github.com/golang-jwt/jwt/v5 5.3.1: Distinguish between token signature validation failure and invalid key type configuration in…
sha256:d819a477e3c71430c7e39b93904d658552f6fd0a02fc4532dcc8876754758157
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
go linux x64 go go go
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| go 1.26 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-17 |
| go 1.26 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-18 |
Case
HOW- Goal
- Distinguish between token signature validation failure and invalid key type configuration in jwt.Parse
- Packages
- Symbols
-
- jwt.Parse
- Environment
- go
- Created
- 2026-08-17T01:28:23Z
Contract
- assert jwt.Parse returns jwt.ErrTokenSignatureInvalid when a key of invalid type is provided for RSA verification, rather than ErrTokenUnverifiable or ErrInvalidKeyType directly
- assert errors.Is reports true for jwt.ErrInvalidKeyType and jwt.ErrTokenSignatureInvalid but false for jwt.ErrTokenUnverifiable when verification fails due to key type mismatch
Files
- NOTES.md
- csx.json
- go.mod
- go.sum
- jwt_test.go