{"record":{"id":"d22929b9c57d3bf8","repo":"slackhq/nebula","slug":"errinvalidpemcertificatebanner","errorCode":"ErrInvalidPEMCertificateBanner","errorMessage":"bytes did not contain a proper certificate banner","messagePattern":"bytes did not contain a proper certificate banner","errorType":"error_code","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cert/errors.go","lineNumber":28,"sourceCode":"\tErrRootExpired                = errors.New(\"root certificate is expired\")\n\tErrExpired                    = errors.New(\"certificate is expired\")\n\tErrNotCA                      = errors.New(\"certificate is not a CA\")\n\tErrNotSelfSigned              = errors.New(\"certificate is not self-signed\")\n\tErrBlockListed                = errors.New(\"certificate is in the block list\")\n\tErrFingerprintMismatch        = errors.New(\"certificate fingerprint did not match\")\n\tErrSignatureMismatch          = errors.New(\"certificate signature did not match\")\n\tErrInvalidPublicKey           = errors.New(\"invalid public key\")\n\tErrInvalidPrivateKey          = errors.New(\"invalid private key\")\n\tErrPublicPrivateCurveMismatch = errors.New(\"public key does not match private key curve\")\n\tErrPublicPrivateKeyMismatch   = errors.New(\"public key and private key are not a pair\")\n\tErrPrivateKeyEncrypted        = errors.New(\"private key must be decrypted\")\n\tErrCaNotFound                 = errors.New(\"could not find ca for the certificate\")\n\tErrUnknownVersion             = errors.New(\"certificate version unrecognized\")\n\tErrCertPubkeyPresent          = errors.New(\"certificate has unexpected pubkey present\")\n\tErrCurveMismatch              = errors.New(\"certificate curve does not match CA\")\n\n\tErrInvalidPEMBlock                   = errors.New(\"input did not contain a valid PEM encoded block\")\n\tErrInvalidPEMCertificateBanner       = errors.New(\"bytes did not contain a proper certificate banner\")\n\tErrInvalidPEMX25519PublicKeyBanner   = errors.New(\"bytes did not contain a proper X25519 public key banner\")\n\tErrInvalidPEMX25519PrivateKeyBanner  = errors.New(\"bytes did not contain a proper X25519 private key banner\")\n\tErrInvalidPEMEd25519PublicKeyBanner  = errors.New(\"bytes did not contain a proper Ed25519 public key banner\")\n\tErrInvalidPEMEd25519PrivateKeyBanner = errors.New(\"bytes did not contain a proper Ed25519 private key banner\")\n\n\tErrNoPeerStaticKey = errors.New(\"no peer static key was present\")\n\tErrNoPayload       = errors.New(\"provided payload was empty\")\n\n\tErrMissingDetails  = errors.New(\"certificate did not contain details\")\n\tErrEmptySignature  = errors.New(\"empty signature\")\n\tErrEmptyRawDetails = errors.New(\"empty rawDetails not allowed\")\n)\n\ntype ErrInvalidCertificateProperties struct {\n\tstr string\n}\n\nfunc NewErrInvalidCertificateProperties(format string, a ...any) error {","sourceCodeStart":10,"sourceCodeEnd":46,"githubUrl":"https://github.com/slackhq/nebula/blob/dd8f660c0ac37903ec4080ca4d3c861ba9342ceb/cert/errors.go#L10-L46","documentation":"Sentinel error ErrInvalidPEMCertificateBanner returned when a decoded PEM block's type string is not a recognized certificate banner. The PEM data itself decoded fine, but the -----BEGIN <type>----- label does not match any supported certificate banner, so the switch in pem.go:113 falls to default.","triggerScenarios":"Thrown at cert/errors.go:28 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check the PEM header label matches a supported certificate banner","Re-export the certificate with nebula-cert so the correct banner is written"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"dd8f660c0ac37903ec4080ca4d3c861ba9342ceb","analyzedAt":"2026-09-03T11:13:55.444Z","contentChangedAt":"2026-09-03T11:13:55.444Z","schemaVersion":2},"datasetVersion":"2026-09-10T17:17:09.494Z"}