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a/example/rust-crypto/Cargo.toml b/example/rust-crypto/Cargo.toml new file mode 100644 index 0000000..8daf488 --- /dev/null +++ b/example/rust-crypto/Cargo.toml @@ -0,0 +1,9 @@ +[package] +name = "rust-crypto" +version = "0.1.0" +edition = "2021" + +[dependencies] +anyhow = "1" +clap = { version = "4", features = ["derive"] } +rsa = "0.9" diff --git a/example/rust-crypto/README.md b/example/rust-crypto/README.md new file mode 100644 index 0000000..c3534f2 --- /dev/null +++ b/example/rust-crypto/README.md @@ -0,0 +1,40 @@ +Test harness for RustCrypto rsa crate *without* implicit rejection +a.k.a Marvin workaround. + +Usage +===== + +Run `step0.sh`, `step1.sh` as normal. Instead of running `step2.sh` run +the `step2-alt.sh` script. + +Build the harness: +``` +cargo build --release +``` + +Execute reproducer against one of the `ciphers.bin` files, for example the one +for 2048 bit key: +``` +cargo run --release -i rsa2048_repeat/ciphers.bin \ +-o rsa2048_repeat/raw_times.csv -k rsa2048/pkcs8.pem -n 256 +``` + +Convert the captured timing information to a format understandable by +the analysis script: +``` +PYTHONPATH=tlsfuzzer marvin-venv/bin/python3 tlsfuzzer/tlsfuzzer/extract.py \ +-l rsa2048_repeat/log.csv --raw-times rsa2048_repeat/raw_times.csv \ +-o rsa2048_repeat/ \ +--clock-frequency 1000 +``` +Since we're using a nanosecond resolution clock in the python script, +we specify the clock frequency as 1000 MHz. + +Finally, run the analysis: +``` +PYTHONPATH=tlsfuzzer marvin-venv/bin/python3 tlsfuzzer/tlsfuzzer/analysis.py \ +-o rsa2048_repeat/ --verbose +``` + +Detailed information about produced output is available in +[tlsfuzzer documentation](https://tlsfuzzer.readthedocs.io/en/latest/timing-analysis.html) diff --git a/example/rust-crypto/src/main.rs b/example/rust-crypto/src/main.rs new file mode 100644 index 0000000..ab451b1 --- /dev/null +++ b/example/rust-crypto/src/main.rs @@ -0,0 +1,67 @@ +use anyhow::{Context as _, Result}; +use clap::Parser; +use rsa::{pkcs8::DecodePrivateKey, Pkcs1v15Encrypt, RsaPrivateKey}; +use std::fs; +use std::io::{Read, Write}; +use std::path::PathBuf; +use std::time::Instant; + +#[derive(Parser, Debug)] +#[command(about = "Measure timing of PKCS#1 v1.5 RSA decryption using RustCrypto rsa crate")] +struct Args { + /// File with the ciphertexts to decrypt + #[arg(short, long)] + infile: PathBuf, + + /// File to write the timing data to + #[arg(short, long)] + outfile: PathBuf, + + /// The private key to use for decryption + #[arg(short, long)] + keyfile: PathBuf, + + /// Size of individual ciphertexts for decryption + #[arg(short = 'n', long)] + size: usize, +} + +fn main() -> Result<()> { + let args = Args::parse(); + + let pem = fs::read_to_string(&args.keyfile) + .with_context(|| format!("unable to read private key from {}", args.keyfile.display()))?; + + let privkey = RsaPrivateKey::from_pkcs8_pem(&pem)?; + + let mut infile = fs::OpenOptions::new() + .read(true) + .open(&args.infile) + .with_context(|| format!("unable to open {} for reading", args.infile.display()))?; + + let mut outfile = fs::OpenOptions::new() + .write(true) + .create(true) + .open(&args.outfile) + .with_context(|| format!("unable to open {} for writing", args.outfile.display()))?; + + writeln!(outfile, "raw times")?; + + loop { + let mut buffer = vec![0; args.size]; + + let n = infile.read(&mut buffer)?; + if n == 0 { + break; + } + + assert!(n == buffer.len()); + + let now = Instant::now(); + let _ = privkey.decrypt(Pkcs1v15Encrypt, &buffer); + writeln!(outfile, "{}", now.elapsed().as_nanos())?; + } + + println!("done"); + Ok(()) +}