88 lines
3.8 KiB
Rust
88 lines
3.8 KiB
Rust
use std::collections::BTreeMap;
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use clap::{App, Arg, ArgMatches, SubCommand};
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use openssl::bn::{BigNum, BigNumContext};
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use openssl::encrypt::Decrypter;
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use openssl::pkey::PKey;
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use openssl::rsa::Rsa;
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use rust_util::util_clap::{Command, CommandError};
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use rust_util::util_msg;
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use rust_util::util_msg::MessageType;
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pub struct CommandImpl;
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// https://docs.rs/openssl/0.10.36/openssl/encrypt/index.html
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impl Command for CommandImpl {
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fn name(&self) -> &str { "rsa-decrypt" }
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fn subcommand<'a>(&self) -> App<'a, 'a> {
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SubCommand::with_name(self.name()).about("RSA Decrypt subcommand")
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.arg(Arg::with_name("pri-key-in").long("pri-key-in").takes_value(true).help("Private key in"))
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.arg(Arg::with_name("encrypted").long("encrypted").takes_value(true).help("Encrypted data"))
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.arg(Arg::with_name("padding").long("padding").takes_value(true)
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.possible_values(&["pkcs1", "oaep", "pss", "none"]).help("Padding"))
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.arg(Arg::with_name("json").long("json").help("JSON output"))
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}
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fn run(&self, _arg_matches: &ArgMatches, sub_arg_matches: &ArgMatches) -> CommandError {
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let json_output = sub_arg_matches.is_present("json");
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if json_output { util_msg::set_logger_std_out(false); }
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let pri_key_in = opt_value_result!(sub_arg_matches.value_of("pri-key-in"), "Require private key in");
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let pri_key_bytes = opt_result!(std::fs::read(pri_key_in), "Read file: {}, failed: {}", pri_key_in);
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let padding_opt = sub_arg_matches.value_of("padding");
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let padding = crate::rsautil::parse_padding(padding_opt)?;
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let padding_str = crate::rsautil::padding_to_string(padding);
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let mut json = BTreeMap::new();
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let keypair = opt_result!(Rsa::private_key_from_pem(&pri_key_bytes), "Parse RSA failed: {}");
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let keypair = opt_result!(PKey::from_rsa(keypair), "RSA to PKey failed: {}");
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let encrypted = if let Some(encrypted) = sub_arg_matches.value_of("encrypted") {
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opt_result!(hex::decode(encrypted), "Decode encrypted HEX failed: {}")
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} else {
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return simple_error!("Data is required, --data-hex or --data argument!");
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};
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util_msg::when(MessageType::DEBUG, || {
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let rsa = keypair.rsa().unwrap();
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let n = rsa.n();
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let d = rsa.d();
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let m = BigNum::from_slice(&encrypted).unwrap();
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let mut r = BigNum::new().unwrap();
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r.mod_exp(&m, d, n, &mut BigNumContext::new().unwrap()).unwrap();
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let v = r.to_vec();
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debugging!("Encrypted raw HEX: 00{}", hex::encode(&v));
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let pos = v.iter().position(|b| *b == 0x00);
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if let Some(pos) = pos {
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debugging!("Encrypted text HEX: {}", hex::encode(&v[pos+1..]));
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}
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});
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let mut decrypter = opt_result!(Decrypter::new(&keypair), "Decrypter new failed: {}");
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opt_result!(decrypter.set_rsa_padding(padding), "Set RSA padding failed: {}");
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let buffer_len = opt_result!(decrypter.decrypt_len(&encrypted), "Decrypt len failed: {}");
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let mut data = vec![0; buffer_len];
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let decrypted_len = opt_result!(decrypter.decrypt(&encrypted, &mut data), "Decrypt failed: {}");
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data.truncate(decrypted_len);
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let encrypted_hex = hex::encode(&encrypted);
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information!("Padding: {}", padding_str);
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success!("Message HEX: {}", hex::encode(&data));
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success!("Message: {}", String::from_utf8_lossy(&data));
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if json_output {
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json.insert("data", hex::encode(&data));
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json.insert("padding", padding_str.to_string());
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json.insert("encrypted", encrypted_hex);
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}
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if json_output {
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println!("{}", serde_json::to_string_pretty(&json).unwrap());
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}
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Ok(None)
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}
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}
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