104 lines
2.7 KiB
Rust
104 lines
2.7 KiB
Rust
pub mod cli;
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pub mod crypto;
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use std::{fs::File, path::Path, io::{self, Read, Write}};
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use crypto::{DobyCipher, EncryptionParams};
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use zeroize::Zeroize;
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pub const MAGIC_BYTES: &[u8; 4] = b"DOBY";
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pub struct Password(Option<String>);
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impl Password {
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fn unwrap_or_ask(self) -> String {
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self.0.unwrap_or_else(|| rpassword::read_password_from_tty(Some("Password: ")).unwrap())
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}
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}
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impl From<Option<&str>> for Password {
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fn from(s: Option<&str>) -> Self {
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Self(s.map(|s| String::from(s)))
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}
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}
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impl From<&str> for Password {
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fn from(s: &str) -> Self {
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Some(s).into()
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}
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}
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impl Zeroize for Password {
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fn zeroize(&mut self) {
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self.0.zeroize()
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}
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}
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pub struct LazyWriter<P: AsRef<Path>> {
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path: Option<P>,
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writer: Option<Box<dyn Write>>,
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}
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impl<P: AsRef<Path>> LazyWriter<P> {
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fn from_path(path: P) -> Self {
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Self {
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path: Some(path),
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writer: None,
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}
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}
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fn from_writer<T: 'static + Write>(writer: T) -> Self {
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Self {
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path: None,
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writer: Some(Box::new(writer)),
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}
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}
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}
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impl<P: AsRef<Path>> Write for LazyWriter<P> {
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fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
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if self.writer.is_none() {
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self.writer = Some(Box::new(File::create(self.path.as_ref().unwrap()).unwrap()));
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}
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self.writer.as_mut().unwrap().write(buf)
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}
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fn flush(&mut self) -> io::Result<()> {
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self.writer.as_mut().unwrap().flush()
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}
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}
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pub fn encrypt<R: Read, W: Write>(reader: &mut R, writer: &mut W, params: &EncryptionParams, mut cipher: DobyCipher, block_size: usize, already_read: Option<Vec<u8>>) -> io::Result<()> {
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writer.write_all(MAGIC_BYTES)?;
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params.write(writer)?;
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let mut buff = vec![0; block_size];
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let mut n = 1;
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if let Some(already_read) = already_read {
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buff[..already_read.len()].clone_from_slice(&already_read);
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n = reader.read(&mut buff[already_read.len()..])?;
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cipher.encrypt_chunk(&mut buff[..n+already_read.len()], writer)?;
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}
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if n > 0 {
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loop {
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n = reader.read(&mut buff)?;
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if n == 0 {
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break;
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} else {
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cipher.encrypt_chunk(&mut buff[..n], writer)?;
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}
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}
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}
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cipher.write_hmac(writer)?;
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Ok(())
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}
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pub fn decrypt<R: Read, W: Write>(reader: &mut R, writer: &mut W, mut cipher: DobyCipher, block_size: usize) -> io::Result<bool> {
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let mut buff = vec![0; block_size];
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loop {
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let n = cipher.decrypt_chunk(reader, &mut buff)?;
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if n == 0 {
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break;
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} else {
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writer.write(&buff[..n])?;
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}
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}
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Ok(cipher.verify_hmac())
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} |