Nimble is a service that helps applications running in trusted execution environments (TEEs) detect rollback attacks (i.e., detect whether a data item retrieved from persistent storage is the latest version).

Nimble can also be used as a generic tamper-proof fault-tolerant append-only ledger.

Nimble will appear at OSDI 2023.

To reproduce the results in our paper, please follow the instructions below to build Nimble and then see experiments/.

Install make, gcc, protobuf-compiler, perl, libssl-dev, and pkg-config. In Ubuntu, you can type:

sudo apt install make gcc libssl-dev pkg-config perl protobuf-compiler

Install rustup

Clone the repository:

git clone https://github.com/Microsoft/Nimble

To run tests:

cargo test

To build:

cargo build --release

Optional: to build the Nimble endorser that runs in Intel SGX with open enclave, please follow the instructions here.

Running a toy local setup with 2 endorsers, coordinator, REST endpoint, and sample REST client. Run each on a different terminal (or in the background, or with detached screen).

  ./target/release/endorser -p 9090
  ./target/release/endorser -p 9091 
  ./target/release/coordinator -e "https://localhost:9090,https://localhost:9091" 
  ./target/release/endpoint_rest
  ./target/release/light_client_rest

Below are the different Nimble binaries, and some of the basic options. Each binary has many other options. You can see them by running the binary and with the --help flag.

  ./target/release/endorser
    -t HOSTNAME
    -p PORT 

  ./target/release/coordinator
    -h HOSTNAME
    -p PORT
    -e "https://HOST_ENDORSER_1:PORT,https://HOST_ENDORSER_2:PORT,https://HOST_ENDORSER_3:PORT" 
    -s "memory" # use "table" to use Azure table instead and provide the following
    -a AZURE_STORAGE_ACCOUNT_NAME
    -k AZURE_STORAGE_MASTER_KEY

Below is a helper tool to interact with the coordinator. After you kill some endorsers, you can add new ones (reconfiguration) by running.

  ./target/release/coordinator_ctrl 
    -c "https://HOST_COORDINATOR:PORT" 
    -a "https://HOST_NEW_ENDORSER_1:PORT;https://HOST_NEW_ENDORSER_2:PORT"

  ./target/release/endpoint_rest
    -t HOST
    -p PORT
    -c "https://HOST_COORDINATOR:PORT"

  ./target/release/endpoint_rest
    -e "https://HOST_ENDPOINT:PORT"

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