{"record":{"id":"35c1deb05fd839a0","repo":"peass-ng/PEASS-ng","slug":"too-few-objects-in-input-vector","errorCode":null,"errorMessage":"too few objects in input vector","messagePattern":"too few objects in input vector","errorType":"validation","errorClass":"ArgumentException","httpStatus":null,"severity":"error","filePath":"winPEAS/winPEASexe/winPEAS/3rdParty/BouncyCastle/asn1/DerExternal.cs","lineNumber":187,"sourceCode":"\t\t\t}\n\t\t}\n\n\t\tpublic Asn1Object ExternalContent\n\t\t{\n\t\t\tget { return externalContent; }\n\t\t\tset { this.externalContent = value; }\n\t\t}\n\n\t\tpublic DerInteger IndirectReference\n\t\t{\n\t\t\tget { return indirectReference; }\n\t\t\tset { this.indirectReference = value; }\n\t\t}\n\n\t\tprivate static Asn1Object GetObjFromVector(Asn1EncodableVector v, int index)\n\t\t{\n\t\t\tif (v.Count <= index)\n\t\t\t\tthrow new ArgumentException(\"too few objects in input vector\", \"v\");\n\n\t\t\treturn v[index].ToAsn1Object();\n\t\t}\n\n\t\tprivate static void WriteEncodable(MemoryStream ms, Asn1Encodable e)\n\t\t{\n\t\t\tif (e != null)\n\t\t\t{\n\t\t\t\tbyte[] bs = e.GetDerEncoded();\n\t\t\t\tms.Write(bs, 0, bs.Length);\n\t\t\t}\n\t\t}\n\t}\n}\n","sourceCodeStart":169,"sourceCodeEnd":202,"githubUrl":"https://github.com/peass-ng/PEASS-ng/blob/53fb989abc2219826385683a6fee826bd6cd38d6/winPEAS/winPEASexe/winPEAS/3rdParty/BouncyCastle/asn1/DerExternal.cs#L169-L202","documentation":"GetObjFromVector extracts the Asn1Object at a given index from an Asn1EncodableVector while DerExternal parses its fields. If the vector has no element at that index (Count <= index), the External structure is missing a required field, so ArgumentException is thrown.","triggerScenarios":"Constructing DerExternal(Asn1EncodableVector, int) where the vector is too short to supply the expected fields at the starting offset — e.g. an empty vector, or offset >= vector.Count.","commonSituations":"Passing a truncated or empty vector to the DerExternal vector constructor; parsing truncated BER streams where optional/required External fields were dropped; using the wrong offset so it points past the end.","solutions":["Check vector.Count > offset before calling the DerExternal vector constructor","Re-parse the source data — too few objects means the encoding is truncated or malformed","Ensure the offset argument points at the first External field, not beyond the vector"],"exampleFix":"// before\nvar ext = new DerExternal(vector, offset);\n// after\nif (vector.Count <= offset)\n    throw new FormatException(\"External vector truncated\");\nvar ext = new DerExternal(vector, offset);","handlingStrategy":"validation","validationCode":"if (vector == null || vector.Count <= offset)\n    throw new FormatException(\"Vector too short to contain an External\");\nvar ext = new DerExternal(vector, offset);","typeGuard":"static bool HasEnoughElements(Asn1EncodableVector v, int index) => v != null && v.Count > index;","tryCatchPattern":"try { var ext = new DerExternal(vector, offset); }\ncatch (ArgumentException ex) when (ex.Message.Contains(\"too few objects\")) {\n    // truncated or misaligned External vector\n}","preventionTips":["Check Count against the offset before constructing","Ensure the DER source is fully read — truncation produces short vectors","Parse Externals from a DerSequence via GetInstance rather than manual vectors when possible"],"tags":["asn1","bouncycastle","der-encoding","argument-validation"],"backgroundTag":"invalid-asn1-encoding","analyzedSha":"53fb989abc2219826385683a6fee826bd6cd38d6","analyzedAt":"2026-09-02T04:25:09.259Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-09T11:17:12.671Z"}