A Lightweight Trusted Execution Environment Construction Method for Fabric Chaincode Based on SGX

doi:10.3969/j.issn.1671-1122.2022.07.009

Abstract

Abstract:

Hyperledger Fabric is an open source distributed ledger platform, which not only takes advantage of the tamper-proof and distributed accounting features of the public chain, but also incorporates advantages such as identity recognition, data confidentiality, low latency and high throughput. The chaincode in the traditional Fabric architecture lacks a secure execution environment, and its container operating environment will bring the risk of privacy leakage. And the existing smart contract privacy protection scheme cannot be applied to the Go language chaincode architecture, and there are defects such as high performance overhead. Therefore, a method and framework were proposed for constructing a lightweight trusted execution environment for Fabric chaincode based on SGX-called E-Fabric, which built trusted images and containers that supported native Go language, created trusted execution environment for chaincode, and verified whether the chaincode was trusted through the remote attestation protocol. Theoretical evaluations and experimental tests show that the creating of the SGX Enclave will increase the overhead. Compared with the original Fabric network, the E-Fabric’s latency increases by about 8%, the throughput decreases by about 4%, and the overall performance can reach 94% of the original Fabric network. At the same time, E-Fabric has a small trusted computing base and stronger security.

Key words: blockchain, Hyperledger Fabric, chaincode, trusted execution environment, Intel SGX

CLC Number:

TP309

KELEKET GOMA Christy Junior Yannick, YI Wenzhe, WANG Juan. A Lightweight Trusted Execution Environment Construction Method for Fabric Chaincode Based on SGX[J]. Netinfo Security, 2022, 22(7): 73-83.

Figures/Tables 10

References 36

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镜像名称	父镜像	基本功能
fabric-peer	alpine:3.10	peer节点镜像,安装peer相关文件,用于生成peer运行容器
fabric-orderer	alpine:3.10	排序节点镜像,安装orderer相关文件,用于生成orderer运行容器
efabric/base	ubuntu:20.04	E-Fabric可信基础镜像,作为链码编译、运行的父镜像
ego-baseos	efabric/base:0.1	Go链码可信运行镜像,用于生成链码运行容器
ego-ccenv	efabric/base:0.1	Go链码可信编译镜像,在链码实例化过程中作为默认编译环境将链码编译为二进制文件

API名称	功能
func AskAttestation(chaincodeAddr string)(Report, error)	向指定地址的链码发送认证请求
func SendAttestation(peerAddr string, Report struct)(error)	将身份认证报告发送给指定地址peer节点
func VerifyAttestation(IASAddr string, Report struct)(Result,error)	peer节点向IAS中心发送验证请求
func EncryptOperation(operation struct, key string)(enOperation,error)	加密操作指令（Invoke或Query）
func DecryptOperation(enOperation struct, key string)(deOperation,error)	解密操作指令
func SignResult(result struct, key string)(siResult,error)	签名操作指令

区块链名称	Enclave数量/个	可信代码数量/行	性能
FPC	2	5000~10000	原Fabric的90%
E-Fabric	1	200~5000	原Fabric的94%