{"record":{"id":"002a84ea1e45ad9a","repo":"moonD4rk/HackBrowserData","slug":"abe-unexpected-key-length-d-want-32","errorCode":null,"errorMessage":"abe: unexpected key length %d (want 32)","messagePattern":"abe: unexpected key length (.+?) \\(want 32\\)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"masterkey/abe_windows.go","lineNumber":64,"sourceCode":"\t\treturn nil, fmt.Errorf(\"abe: %w\", err)\n\t}\n\n\texePath, err := winutil.ExecutablePath(browserKey)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"abe: %w\", err)\n\t}\n\n\tenv := map[string]string{\n\t\tenvEncKeyB64: base64.StdEncoding.EncodeToString(encKey),\n\t}\n\n\tinj := &injector.Reflective{}\n\tkey, err := inj.Inject(exePath, pl, env)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"abe: inject into %s: %w\", exePath, err)\n\t}\n\tif len(key) != 32 {\n\t\treturn nil, fmt.Errorf(\"abe: unexpected key length %d (want 32)\", len(key))\n\t}\n\tlog.Infof(\"abe: retrieved %s master key via reflective injection\", browserKey)\n\treturn key, nil\n}\n\nfunc loadEncryptedKey(localStatePath string) ([]byte, error) {\n\tif localStatePath == \"\" {\n\t\treturn nil, errNoABEKey\n\t}\n\tdata, err := os.ReadFile(localStatePath)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"abe: read Local State: %w\", err)\n\t}\n\n\traw := gjson.GetBytes(data, \"os_crypt.app_bound_encrypted_key\")\n\tif !raw.Exists() {\n\t\treturn nil, errNoABEKey\n\t}","sourceCodeStart":46,"sourceCodeEnd":82,"githubUrl":"https://github.com/moonD4rk/HackBrowserData/blob/0503d04d7a8d0379d060268a74f1b149e5a0aad5/masterkey/abe_windows.go#L46-L82","documentation":"RetrieveKey in masterkey/abe_windows.go obtains the Chrome app-bound encryption (ABE) master key by reflectively injecting a payload into the browser process. After injection, the payload is expected to return the 32-byte AES-256 master key. This error means the injection channel returned a byte slice whose length is not 32, so the payload output is not a valid key and cannot be used for decryption.","triggerScenarios":"Calling RetrieveKey when the injected payload returns malformed output: the DLL produced truncated/corrupted data, an error string was captured instead of key bytes, or a payload/Chrome version mismatch caused the bootstrap to hand back something other than the raw 32-byte key.","commonSituations":"Chrome updated its ABE bootstrap layout so the payload returns a different struct; a stale or mismatched abe payload binary; the target process is not the expected Chrome binary; sandbox/AV interference caused partial copy-back of the key buffer.","solutions":["Rebuild and re-embed the ABE payload so it matches the current bootstrap layout (make payload && make build-windows; run make gen-layout if bootstrap_layout.h changed).","Log len(key) and a hex dump of the returned bytes to identify what the payload actually returned (error text vs truncated key).","Verify the injected payload completed successfully and that Chrome's version matches the layout the payload was built against.","Check that AV/EDR is not stripping or corrupting the returned buffer and that the payload DLL was injected into the real chrome.exe."],"exampleFix":"// before\nkey, err := inj.Inject(exePath, pl, env)\nif err != nil {\n\treturn nil, fmt.Errorf(\"abe: inject into %s: %w\", exePath, err)\n}\n// after - surface the payload's raw output for diagnosis\nkey, err := inj.Inject(exePath, pl, env)\nif err != nil {\n\treturn nil, fmt.Errorf(\"abe: inject into %s: %w\", exePath, err)\n}\nif len(key) != 32 {\n\treturn nil, fmt.Errorf(\"abe: unexpected key length %d (want 32): got %x\", len(key), key)\n}","handlingStrategy":"validation","validationCode":"if len(key) != 32 {\n\treturn fmt.Errorf(\"payload returned %d bytes, not a 32-byte key; rebuild payload for this Chrome version\", len(key))\n}","typeGuard":null,"tryCatchPattern":"key, err := RetrieveKey(exePath, localStatePath)\nif err != nil {\n\tvar keyLenErr *KeyLengthError\n\tif errors.As(err, &keyLenErr) {\n\t\tlog.Warnf(\"ABE payload mismatch: %v; falling back to DPAPI path\", err)\n\t\treturn fallbackDecrypt()\n\t}\n\treturn err\n}","preventionTips":["Keep the ABE payload in lockstep with the Chrome versions you target (regenerate layout constants after Chrome updates).","Test RetrieveKey against each supported Chrome version in CI where possible.","Log a hex preview of any non-32-byte payload return to speed diagnosis."],"tags":["windows","chrome","key-extraction","injection"],"backgroundTag":"unexpected-api-response-shape","analyzedSha":"0503d04d7a8d0379d060268a74f1b149e5a0aad5","analyzedAt":"2026-09-06T13:38:28.707Z","contentChangedAt":"2026-09-06T13:38:28.707Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}