{"record":{"id":"0c26e0bee9c08c60","repo":"hyperledger/fabric","slug":"identity-type-not-recognized","errorCode":null,"errorMessage":"identity type not recognized","messagePattern":"identity type not recognized","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"msp/mspimpl.go","lineNumber":332,"sourceCode":"\treturn msp.signer, nil\n}\n\n// Validate attempts to determine whether\n// the supplied identity is valid according\n// to this MSP's roots of trust; it returns\n// nil in case the identity is valid or an\n// error otherwise\nfunc (msp *bccspmsp) Validate(id Identity) error {\n\tmspLogger.Debugf(\"MSP %s validating identity\", msp.name)\n\n\tswitch id := id.(type) {\n\t// If this identity is of this specific type,\n\t// this is how I can validate it given the\n\t// root of trust this MSP has\n\tcase *identity:\n\t\treturn msp.validateIdentity(id)\n\tdefault:\n\t\treturn errors.New(\"identity type not recognized\")\n\t}\n}\n\n// hasOURole checks that the identity belongs to the organizational unit\n// associated to the specified MSPRole.\n// This function does not check the certifiers identifier.\n// Appropriate validation needs to be enforced before.\nfunc (msp *bccspmsp) hasOURole(id Identity, mspRole m.MSPRole_MSPRoleType) error {\n\t// Check NodeOUs\n\tif !msp.ouEnforcement {\n\t\treturn errors.New(\"NodeOUs not activated. Cannot tell apart identities.\")\n\t}\n\n\tmspLogger.Debugf(\"MSP %s checking if the identity is a client\", msp.name)\n\n\tswitch id := id.(type) {\n\t// If this identity is of this specific type,\n\t// this is how I can validate it given the","sourceCodeStart":314,"sourceCodeEnd":350,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/msp/mspimpl.go#L314-L350","documentation":"bccspmsp.Validate switches on the concrete Go type of the Identity argument; only the internal *identity implementation is validatable. Any other Identity implementation (or a nil/foreign Identity from a different MSP provider or an Idemix identity passed to a fabric MSP) falls into the default branch and yields this error. It is a defensive type check, not a certificate validation failure.","triggerScenarios":"Calling bccspmsp.Validate(id) where id is not the msp package's internal *identity — e.g. passing a nil Identity, an Idemix signing identity, a custom Identity implementation from another package, or an identity produced by a different MSP implementation to a FABRIC-type MSP. Called from Validate, satisfiesPrincipalInternalPreV13, and satisfiesPrincipalInternalV142 during ACL/principal checks.","commonSituations":"Mixing identities obtained from an Idemix MSP with an X.509 fabric MSP in policy evaluation; custom code implementing the Identity interface and passing it to MSP.Validate; a nil identity slipping through a failed deserialization before validation.","solutions":["Ensure the identity was created by the same MSP (or same msp.NewBccspMsp(FABRIC) provider) via DeserializeIdentity or GetIdentityFromBytes","Check for a nil identity before calling Validate — nil falls to the default case","If using Idemix identities, route validation through an Idemix MSP provider (msp.NewBccspmsp with Idemix type) rather than the fabric bccspmsp","Inspect why a non-standard Identity implementation reached the policy engine; remove custom Identity wrappers"],"exampleFix":"// before: validating a foreign/nil identity\nvar id msp.Identity // nil\nerr := fabricMsp.Validate(id) // \"identity type not recognized\"\n\n// after: deserialize through the same MSP\nid, _, err := fabricMsp.DeserializeIdentity(identityBytes)\nif err != nil { return err }\nreturn fabricMsp.Validate(id)","handlingStrategy":"validation","validationCode":"func isFabricIdentity(id msp.Identity) bool {\n    if id == nil { return false }\n    // only identities deserialized from this MSP are validatable\n    return identityFromThisMSP(id)\n}","typeGuard":"func asFabricIdentity(id msp.Identity) (*identity, bool) {\n    ident, ok := id.(*identity)\n    if !ok || ident == nil { return nil, false }\n    return ident, true\n}","tryCatchPattern":"if err := fabricMsp.Validate(id); err != nil {\n    if strings.Contains(err.Error(), \"identity type not recognized\") {\n        return fmt.Errorf(\"identity was not issued/deserialized by this fabric MSP: %w\", err)\n    }\n    return err\n}","preventionTips":["Obtain identities only via DeserializeIdentity of the MSP that will validate them","Never mix Idemix and X.509 identities in the same MSP validation path","Check deserialization errors before validation; nil identities fall to the default branch","Avoid custom Identity interface implementations when calling MSP.Validate directly"],"tags":["hyperledger-fabric","msp","identity","type-mismatch"],"backgroundTag":"identity-type-not-recognized","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"}