83 lines
3.9 KiB
Rust
83 lines
3.9 KiB
Rust
use std::collections::BTreeMap;
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use clap::{App, Arg, ArgMatches, SubCommand};
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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 yubikey::piv::AlgorithmId;
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use yubikey::YubiKey;
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use crate::{pinutil, pivutil};
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use crate::util::{read_stdin, try_decode};
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pub struct CommandImpl;
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impl Command for CommandImpl {
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fn name(&self) -> &str { "piv-decrypt" }
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fn subcommand<'a>(&self) -> App<'a, 'a> {
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SubCommand::with_name(self.name()).about("PIV decrypt(RSA) subcommand")
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.arg(Arg::with_name("slot").short("s").long("slot").takes_value(true).help("PIV slot, e.g. 82, 83 ... 95, 9a, 9c, 9d, 9e"))
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.arg(Arg::with_name("pin").short("p").long("pin").takes_value(true).help("PIV card user PIN"))
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.arg(Arg::with_name("ciphertext").long("ciphertext").short("c").takes_value(true).help("Encrypted data (HEX or Base64)"))
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.arg(Arg::with_name("stdin").long("stdin").help("Standard input (Ciphertext)"))
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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 slot = opt_value_result!(sub_arg_matches.value_of("slot"), "--slot must assigned, e.g. 82, 83 ... 95, 9a, 9c, 9d, 9e");
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let pin_opt = sub_arg_matches.value_of("pin");
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let pin_opt = pinutil::get_pin(pin_opt);
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let pin_opt = pin_opt.as_deref();
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let pin = opt_value_result!(pin_opt, "User pin must be assigned");
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let encrypted_data = if let Some(ciphertext) = sub_arg_matches.value_of("ciphertext") {
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opt_result!(try_decode(ciphertext), "Decode --ciphertext failed: {}")
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} else if sub_arg_matches.is_present("stdin") {
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read_stdin()?
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} else {
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return simple_error!("Argument --ciphertext must be assigned");
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};
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let mut yk = opt_result!(YubiKey::open(), "YubiKey not found: {}");
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opt_result!(yk.verify_pin(pin.as_bytes()), "YubiKey verify pin failed: {}");
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let slot_id = pivutil::get_slot_id(slot)?;
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let decrypt_result = yubikey::piv::decrypt_data(&mut yk, &encrypted_data,
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AlgorithmId::Rsa2048, slot_id);
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let decrypted_data = opt_result!(decrypt_result, "Decrypt data failed: {}");
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let decrypted_data_bytes = decrypted_data.as_slice();
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information!("Decrypted raw data: {}", hex::encode(decrypted_data_bytes));
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if !(decrypted_data_bytes[0] == 0x00 && decrypted_data_bytes[1] == 0x02) {
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return simple_error!("Not valid encrypted data, prefix: {}", hex::encode(&decrypted_data_bytes[0..2]));
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}
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let mut index_of_00_from_index_1 = 0;
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for (i, byte) in decrypted_data_bytes.iter().enumerate().skip(1) {
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if *byte == 0x00 {
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index_of_00_from_index_1 = i + 1;
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break;
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}
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}
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if index_of_00_from_index_1 == 0 {
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return simple_error!("Not valid encrypted data, cannot find 0x00");
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}
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let clear_data = &decrypted_data_bytes[index_of_00_from_index_1..];
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success!("Decrypt data: {}", hex::encode(clear_data));
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success!("Decrypt data in UTF-8: {}", String::from_utf8_lossy(clear_data));
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if json_output {
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let mut json = BTreeMap::<&'_ str, String>::new();
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json.insert("encrypted_data_hex", hex::encode(&encrypted_data));
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json.insert("decrypted_data_hex", hex::encode(decrypted_data_bytes));
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json.insert("clear_data_hex", hex::encode(clear_data));
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json.insert("clear_data", String::from_utf8_lossy(clear_data).to_string());
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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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