272 lines
11 KiB
Rust
272 lines
11 KiB
Rust
use std::fs;
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use std::fs::File;
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use std::io::{Read, Write};
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use std::path::PathBuf;
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use std::time::Instant;
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use clap::Args;
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use flate2::Compression;
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use rsa::Pkcs1v15Encrypt;
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use rust_util::{debugging, failure, information, opt_result, simple_error, success, util_msg, warning, XResult};
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use crate::{util, util_ecdh};
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use crate::compress::GzStreamEncoder;
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use crate::config::{TinyEncryptConfig, TinyEncryptConfigEnvelop};
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use crate::crypto_aes::aes_gcm_encrypt;
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use crate::crypto_rsa::parse_spki;
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use crate::spec::{EncMetadata, TINY_ENCRYPT_VERSION_10, TinyEncryptEnvelop, TinyEncryptEnvelopType, TinyEncryptMeta};
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use crate::util::{ENC_AES256_GCM_P256, TINY_ENC_CONFIG_FILE};
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use crate::wrap_key::{WrapKey, WrapKeyHeader};
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#[derive(Debug, Args)]
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pub struct CmdEncrypt {
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/// Files need to be decrypted
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pub paths: Vec<PathBuf>,
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/// Comment
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#[arg(long, short = 'c')]
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pub comment: Option<String>,
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/// Encrypted comment
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#[arg(long, short = 'C')]
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pub encrypted_comment: Option<String>,
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/// Encryption profile
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#[arg(long, short = 'p')]
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pub profile: Option<String>,
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/// Compress before encrypt
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#[arg(long, short = 'x')]
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pub compress: bool,
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/// Compress level (from 0[none], 1[fast] .. 6[default] .. to 9[best])
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#[arg(long, short = 'L')]
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pub compress_level: Option<u32>,
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/// Compatible with 1.0
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#[arg(long, short = '1')]
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pub compatible_with_1_0: bool,
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/// Remove source file
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#[arg(long, short = 'R')]
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pub remove_file: bool,
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}
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pub fn encrypt(cmd_encrypt: CmdEncrypt) -> XResult<()> {
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let config = TinyEncryptConfig::load(TINY_ENC_CONFIG_FILE)?;
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debugging!("Found tiny encrypt config: {:?}", config);
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let envelops = config.find_envelops(&cmd_encrypt.profile)?;
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if envelops.is_empty() { return simple_error!("Cannot find any valid envelops"); }
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debugging!("Found envelops: {:?}", envelops);
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let envelop_tkids: Vec<_> = envelops.iter().map(|e| format!("{}:{}", e.r#type.get_name(), e.kid)).collect();
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information!("Matched {} envelop(s): \n- {}", envelops.len(), envelop_tkids.join("\n- "));
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debugging!("Cmd encrypt: {:?}", cmd_encrypt);
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let start = Instant::now();
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let mut succeed_count = 0;
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let mut failed_count = 0;
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let mut total_len = 0_u64;
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for path in &cmd_encrypt.paths {
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let start_encrypt_single = Instant::now();
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match encrypt_single(path, &envelops, &cmd_encrypt) {
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Ok(len) => {
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succeed_count += 1;
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total_len += len;
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success!(
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"Encrypt {} succeed, cost {} ms, file size {} byte(s)",
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path.to_str().unwrap_or("N/A"),
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start_encrypt_single.elapsed().as_millis(),
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len
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);
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}
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Err(e) => {
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failed_count += 1;
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failure!("Encrypt {} failed: {}", path.to_str().unwrap_or("N/A"), e);
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}
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}
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}
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if (succeed_count + failed_count) > 1 {
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success!(
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"Encrypt succeed {} file(s) {} byte(s), failed {} file(s), total cost {} ms",
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succeed_count,
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total_len,
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failed_count,
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start.elapsed().as_millis(),
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);
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}
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Ok(())
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}
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fn encrypt_single(path: &PathBuf, envelops: &[&TinyEncryptConfigEnvelop], cmd_encrypt: &CmdEncrypt) -> XResult<u64> {
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let path_display = format!("{}", path.display());
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util::require_none_tiny_enc_file_and_exists(path)?;
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let mut file_in = opt_result!(File::open(path), "Open file: {} failed: {}", &path_display);
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let path_out = format!("{}{}", path_display, util::TINY_ENC_FILE_EXT);
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util::require_file_not_exists(path_out.as_str())?;
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let (key, nonce) = util::make_key256_and_nonce();
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let envelops = encrypt_envelops(&key, &envelops)?;
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let encrypted_comment = match &cmd_encrypt.encrypted_comment {
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None => None,
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Some(encrypted_comment) => Some(util::encode_base64(
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&aes_gcm_encrypt(&key, &nonce, encrypted_comment.as_bytes())?))
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};
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let file_metadata = opt_result!(fs::metadata(path), "Read file: {} meta failed: {}", path.display());
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let enc_metadata = EncMetadata {
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comment: cmd_encrypt.comment.clone(),
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encrypted_comment,
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encrypted_meta: None,
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compress: cmd_encrypt.compress,
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};
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let mut encrypt_meta = TinyEncryptMeta::new(&file_metadata, &enc_metadata, &nonce, envelops);
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debugging!("Encrypted meta: {:?}", encrypt_meta);
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if cmd_encrypt.compatible_with_1_0 {
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if let Some(envelops) = encrypt_meta.envelops {
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let mut filter_envelops = vec![];
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for envelop in envelops {
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if (envelop.r#type == TinyEncryptEnvelopType::Pgp) && encrypt_meta.pgp_envelop.is_none() {
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encrypt_meta.pgp_fingerprint = Some(format!("KID:{}", envelop.kid));
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encrypt_meta.pgp_envelop = Some(envelop.encrypted_key.clone());
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} else if (envelop.r#type == TinyEncryptEnvelopType::Ecdh) && encrypt_meta.ecdh_envelop.is_none() {
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encrypt_meta.ecdh_point = Some(format!("KID:{}", envelop.kid));
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encrypt_meta.ecdh_envelop = Some(envelop.encrypted_key.clone());
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} else {
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filter_envelops.push(envelop);
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}
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}
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encrypt_meta.envelops = if filter_envelops.is_empty() { None } else { Some(filter_envelops) };
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if encrypt_meta.envelops.is_none() {
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encrypt_meta.version = TINY_ENCRYPT_VERSION_10.to_string();
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}
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}
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}
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let mut file_out = File::create(&path_out)?;
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opt_result!(file_out.write_all(&util::TINY_ENC_MAGIC_TAG.to_be_bytes()), "Write tag failed: {}");
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let encrypted_meta_bytes = opt_result!(serde_json::to_vec(&encrypt_meta), "Generate meta json bytes failed: {}");
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let encrypted_meta_bytes_len = encrypted_meta_bytes.len() as u32;
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opt_result!(file_out.write_all(&encrypted_meta_bytes_len.to_be_bytes()), "Write meta len failed: {}");
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opt_result!(file_out.write_all(&encrypted_meta_bytes), "Write meta failed: {}");
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let start = Instant::now();
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util_msg::print_lastline(&format!("Encrypting file: {} ...", path_display));
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encrypt_file(&mut file_in, &mut file_out, &key, &nonce, cmd_encrypt.compress, &cmd_encrypt.compress_level)?;
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util_msg::clear_lastline();
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let encrypt_duration = start.elapsed();
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debugging!("Encrypt file: {} elapsed: {} ms", path_display, encrypt_duration.as_millis());
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util::zeroize(key);
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util::zeroize(nonce);
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drop(file_in);
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drop(file_out);
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if cmd_encrypt.remove_file {
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match fs::remove_file(path) {
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Err(e) => warning!("Remove file: {} failed: {}", path_display, e),
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Ok(_) => information!("Remove file: {} succeed", path_display),
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}
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}
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Ok(file_metadata.len())
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}
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fn encrypt_file(file_in: &mut File, file_out: &mut File, key: &[u8], nonce: &[u8], compress: bool, compress_level: &Option<u32>) -> XResult<usize> {
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let mut total_len = 0;
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let mut buffer = [0u8; 1024 * 8];
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let key = opt_result!(key.try_into(), "Key is not 32 bytes: {}");
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let mut gz_encoder = match compress_level {
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None => GzStreamEncoder::new_default(),
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Some(compress_level) => {
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if *compress_level > 9 {
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return simple_error!("Compress level must in range [0, 9]");
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}
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GzStreamEncoder::new(Compression::new(*compress_level))
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}
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};
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let mut encryptor = aes_gcm_stream::Aes256GcmStreamEncryptor::new(key, &nonce);
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loop {
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let len = opt_result!(file_in.read(&mut buffer), "Read file failed: {}");
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if len == 0 {
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let last_block = if compress {
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let last_compressed_buffer = opt_result!(gz_encoder.finalize(), "Decompress file failed: {}");
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let mut encrypted_block = encryptor.update(&last_compressed_buffer);
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let (last_block, tag) = encryptor.finalize();
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encrypted_block.extend_from_slice(&last_block);
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encrypted_block.extend_from_slice(&tag);
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encrypted_block
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} else {
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let (mut last_block, tag) = encryptor.finalize();
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last_block.extend_from_slice(&tag);
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last_block
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};
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opt_result!(file_out.write_all(&last_block), "Write file failed: {}");
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debugging!("Encrypt finished, total bytes: {}", total_len);
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break;
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} else {
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total_len += len;
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let encrypted = if compress {
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let compressed = opt_result!(gz_encoder.update(&buffer[0..len]), "Decompress file failed: {}");
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encryptor.update(&compressed)
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} else {
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encryptor.update(&buffer[0..len])
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};
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opt_result!(file_out.write_all(&encrypted), "Write file failed: {}");
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}
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}
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util::zeroize(key);
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Ok(total_len)
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}
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fn encrypt_envelops(key: &[u8], envelops: &[&TinyEncryptConfigEnvelop]) -> XResult<Vec<TinyEncryptEnvelop>> {
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let mut encrypted_envelops = vec![];
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for envelop in envelops {
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match envelop.r#type {
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TinyEncryptEnvelopType::Pgp => {
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encrypted_envelops.push(encrypt_envelop_pgp(key, envelop)?);
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}
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TinyEncryptEnvelopType::Ecdh => {
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encrypted_envelops.push(encrypt_envelop_ecdh(key, envelop)?);
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}
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_ => return simple_error!("Not supported type: {:?}", envelop.r#type),
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}
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}
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Ok(encrypted_envelops)
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}
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fn encrypt_envelop_ecdh(key: &[u8], envelop: &TinyEncryptConfigEnvelop) -> XResult<TinyEncryptEnvelop> {
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let public_key_point_hex = &envelop.public_part;
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let (shared_secret, ephemeral_spki) = util_ecdh::compute_shared_secret(public_key_point_hex)?;
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let shared_key = util::simple_kdf(shared_secret.as_slice());
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let (_, nonce) = util::make_key256_and_nonce();
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let encrypted_key = aes_gcm_encrypt(&shared_key, &nonce, key)?;
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let wrap_key = WrapKey {
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header: WrapKeyHeader {
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kid: Some(envelop.kid.clone()),
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enc: ENC_AES256_GCM_P256.to_string(),
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e_pub_key: util::encode_base64_url_no_pad(&ephemeral_spki),
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},
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nonce,
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encrypted_data: encrypted_key,
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};
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let encoded_wrap_key = wrap_key.encode()?;
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Ok(TinyEncryptEnvelop {
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r#type: envelop.r#type,
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kid: envelop.kid.clone(),
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desc: envelop.desc.clone(),
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encrypted_key: encoded_wrap_key,
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})
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}
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fn encrypt_envelop_pgp(key: &[u8], envelop: &TinyEncryptConfigEnvelop) -> XResult<TinyEncryptEnvelop> {
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let pgp_public_key = opt_result!(parse_spki(&envelop.public_part), "Parse PGP public key failed: {}");
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let mut rng = rand::thread_rng();
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let encrypted_key = opt_result!(pgp_public_key.encrypt(&mut rng, Pkcs1v15Encrypt, key), "PGP public key encrypt failed: {}");
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Ok(TinyEncryptEnvelop {
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r#type: envelop.r#type,
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kid: envelop.kid.clone(),
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desc: envelop.desc.clone(),
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encrypted_key: util::encode_base64(&encrypted_key),
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})
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}
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