Sample
github.com/golang-jwt/jwt/v5 5.3.1: Validate custom claims in golang-jwt v5 using ClaimsValidator instead of the silently ignored v4 Valid method
Verified sample for golang github.com/golang-jwt/jwt/v5 5.3.1: Validate custom claims in golang-jwt v5 using ClaimsValidator instead of the silently ignored…
sha256:5cc6ca09e311b47fd32d10456d99a84756f1419206b988682cadf876c050712e
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
- Validate custom claims in golang-jwt v5 using ClaimsValidator instead of the silently ignored v4 Valid method
- Packages
- Symbols
-
- jwt.ParseWithClaims
- jwt.ClaimsValidator
- jwt.RegisteredClaims
- jwt.ErrTokenInvalidClaims
- jwt.WithValidMethods
- jwt.WithExpirationRequired
- Environment
- go
- Created
- 2026-08-17T01:27:14Z
Contract
- jwt.ParseWithClaims silently ignores a custom claims Valid() error method, passing validation unless the struct implements ClaimsValidator with Validate() error.
- ClaimsValidator.Validate errors are wrapped into jwt.ErrTokenInvalidClaims.
- jwt.ParseWithClaims requires a pointer to a struct implementing jwt.Claims, rejecting value instances with a JSON decode error.
- jwt.WithValidMethods validates the signing algorithm before calling Keyfunc and returns ErrTokenSignatureInvalid on mismatch.
- jwt.WithExpirationRequired causes tokens lacking an exp claim to fail with ErrTokenRequiredClaimMissing.
Files
- NOTES.md
- claims.go
- claims_test.go
- csx.json
- go.mod
- go.sum