{"record":{"id":"a09dedc043d38b76","repo":"hyperledger/fabric","slug":"failed-generating-a-new-signatureheader-s","errorCode":null,"errorMessage":"failed generating a new SignatureHeader: %s","messagePattern":"failed generating a new SignatureHeader: (.+?)","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"protoutil/commonutils.go","lineNumber":173,"sourceCode":"\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\treturn &cb.SignatureHeader{\n\t\tCreator: creator,\n\t\tNonce:   nonce,\n\t}, nil\n}\n\n// NewSignatureHeaderOrPanic returns a signature header and panics on error.\nfunc NewSignatureHeaderOrPanic(id identity.Serializer) *cb.SignatureHeader {\n\tif id == nil {\n\t\tpanic(errors.New(\"invalid signer. cannot be nil\"))\n\t}\n\n\tsignatureHeader, err := NewSignatureHeader(id)\n\tif err != nil {\n\t\tpanic(fmt.Errorf(\"failed generating a new SignatureHeader: %s\", err))\n\t}\n\n\treturn signatureHeader\n}\n\n// SignOrPanic signs a message and panics on error.\nfunc SignOrPanic(signer identity.Signer, msg []byte) []byte {\n\tif signer == nil {\n\t\tpanic(errors.New(\"invalid signer. cannot be nil\"))\n\t}\n\n\tsigma, err := signer.Sign(msg)\n\tif err != nil {\n\t\tpanic(fmt.Errorf(\"failed generating signature: %s\", err))\n\t}\n\treturn sigma\n}\n","sourceCodeStart":155,"sourceCodeEnd":191,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/protoutil/commonutils.go#L155-L191","documentation":"NewSignatureHeaderOrPanic calls NewSignatureHeader, which serializes the signing identity and generates a random nonce; if either fails it panics with 'failed generating a new SignatureHeader: %s' wrapping the cause. Typically the inner error comes from id.Serialize() — the identity cannot be marshaled — or from nonce generation (crypto entropy failure).","triggerScenarios":"Calling NewSignatureHeaderOrPanic with a non-nil but broken identity.Serializer whose Serialize() errors — e.g. an msp identity whose certificate is expired/unparseable — or CreateNonce failing due to crypto/rand unavailability.","commonSituations":"Expired or malformed enrollment certificates in MSP config; identity loaded from a corrupt keystore; unusual environments lacking /dev/urandom (restricted containers); misconfigured local MSP directory.","solutions":["Read the wrapped %s cause: if it is a Serialize error, re-enroll or refresh the signing identity/certificates.","Verify local MSP configuration (certs, keystore, signcerts) is complete and unexpired.","Check entropy availability (crypto/rand) in the runtime container if nonce generation is the failure.","Use non-panicking NewSignatureHeader to handle the error gracefully in user-facing paths."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"// probe identity serialization before the panicking API\nif _, err := id.Serialize(); err != nil {\n    return fmt.Errorf(\"signing identity cannot be serialized: %w\", err)\n}\nsigHdr := protoutil.NewSignatureHeaderOrPanic(id)","typeGuard":null,"tryCatchPattern":"func safeSigHeader(id identity.Serializer) (hdr *cb.SignatureHeader, err error) {\n    defer func() {\n        if r := recover(); r != nil {\n            err = fmt.Errorf(\"signature header generation failed: %v\", r)\n        }\n    }()\n    hdr = protoutil.NewSignatureHeaderOrPanic(id)\n    return\n}","preventionTips":["Log the wrapped cause (%s payload) to distinguish Serialize failures from nonce-generation failures","Refresh expired certificates and validate MSP dirs (certs parseable) before serving","Monitor crypto/rand availability in hardened/restricted containers","Prefer non-panicking NewSignatureHeader in user-facing request paths"],"tags":["hyperledger-fabric","panic","signing","msp"],"backgroundTag":"signing-identity-failure","analyzedSha":"2736b63f8fd5932511d56fe68b7039d15977f7f6","analyzedAt":"2026-09-04T08:52:36.465Z","contentChangedAt":"2026-09-04T08:52:36.465Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}