174         auto opHandle = keymaster.begin(purpose, kmKey, inParams, outParams);  in begin()  local
175         if (opHandle) {  in begin()
176             return opHandle;  in begin()
178         if (opHandle.errorCode() != ErrorCode::KEY_REQUIRES_UPGRADE) return opHandle;  in begin()
201     auto opHandle = begin(keymaster, dir, KeyPurpose::ENCRYPT, keyParams, opParams, &outParams);  in encryptWithKeymasterKey()  local
202     if (!opHandle) return false;  in encryptWithKeymasterKey()
212     if (!opHandle.updateCompletely(message, &body)) return false;  in encryptWithKeymasterKey()
215     if (!opHandle.finish(&mac)) return false;  in encryptWithKeymasterKey()
228     auto opHandle = begin(keymaster, dir, KeyPurpose::DECRYPT, keyParams, opParams, nullptr);  in decryptWithKeymasterKey()  local
229     if (!opHandle) return false;  in decryptWithKeymasterKey()
230     if (!opHandle.updateCompletely(bodyAndMac, message)) return false;  in decryptWithKeymasterKey()
231     if (!opHandle.finish(nullptr)) return false;  in decryptWithKeymasterKey()