use OpenPGPTool encrypt file

sample.gpg

@@ -0,0 +1,74 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Comment: GPGTools - https://gpgtools.org
+
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+=HzsD
+-----END PGP PUBLIC KEY BLOCK-----

src/main.rs

@@ -3,21 +3,12 @@ pub mod oss_util;
 pub mod pgp_util;
 
 use std::{
-    io::Write,
     time::SystemTime,
 };
 use rust_util::{
     XResult,
 };
-use crate::openpgp::armor;
+use pgp_util::OpenPGPTool;
-use openpgp::{
-    types::KeyFlags,
-    TPK,
-    parse::Parse,
-    serialize::stream::{
-        Message, Encryptor, LiteralWriter,
-    },
-};
 
 // https://docs.sequoia-pgp.org/sequoia_openpgp/serialize/stream/struct.Encryptor.html
 // https://gitlab.com/sequoia-pgp/sequoia/blob/master/openpgp/examples/generate-encrypt-decrypt.rs
@@ -26,109 +17,9 @@ fn main() -> XResult<()> {
 
     println!("{}", SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs());
 
-    // let oss_client = OSSClient::new("oss-cn-shanghai.aliyuncs.com", "***", "***");
+    let openpgp_client = OpenPGPTool::from_file("sample.gpg")?;
-    // let oss_put_url = oss_client.generate_signed_put_url("hatterbucket", "abc_2.txt", 1000_u64);
 
-    // let client = reqwest::Client::new();
+    openpgp_client.encrypt_file("a", "b.gpg", false)?;
-    // let f = File::open("README.md")?;
-    // let resp = client.put(&oss_put_url)
-    //                  .body(f)
-    //                  .send()?;
-    // println!("RESP: {:?}", resp);
-
-    let b = r#"-----BEGIN PGP PUBLIC KEY BLOCK-----
-    Comment: GPGTools - https://gpgtools.org
-    
-    mQINBFbFsmEBEACvuRVhMfEWNkP2RP7D3sEaId+qXKi6UnXRxGppbBff+Zkp+h4Y
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-    VvhSegJ3QeP4bkBgxW1X6t1QgQGRJnundzv4U+tKbltS5hPmvcU=
-    =HzsD
-    -----END PGP PUBLIC KEY BLOCK-----"#.as_bytes();
-
-
-    let tpk = TPK::from_bytes(b)?;
-
-    let recipient = tpk.keys_valid()
-                       .key_flags(KeyFlags::default()
-                       .set_encrypt_at_rest(true)
-                       .set_encrypt_for_transport(true))
-                       .map(|(_, _, key)| key.into())
-                       .nth(0)
-                       .unwrap();
-
-    let sink = armor::Writer::new(std::io::stdout(), armor::Kind::Message, &[])?;
-
-    let message = Message::new(sink);
-    let encryptor = Encryptor::for_recipient(message, recipient).build()?;
-    let mut pgp_encrypt_writer = LiteralWriter::new(encryptor).build()?;
-    pgp_encrypt_writer.write_all(b"Hello world.")?;
-    pgp_encrypt_writer.finalize()?;
 
     Ok(())
 }

src/pgp_util.rs

@@ -2,7 +2,10 @@ extern crate sequoia_openpgp as openpgp;
 use crate::openpgp::armor;
 use std::{
     fs::File,
+    path::Path,
     io::{
+        ErrorKind,
+        Read,
         Write,
         BufWriter,
     },
@@ -22,25 +25,37 @@ use openpgp::{
         LiteralWriter,
     },
 };
+use indicatif::{
+    ProgressBar, 
+    ProgressStyle
+};
 
-pub struct OpenPGPClient {
+const BUFF_SIZE: usize = 512 * 1024;
+const PB_PROGRESS: &str = "#-";
+const PB_TEMPLATE: &str = "{spinner:.green} [{elapsed_precise}] [{bar:40.cyan/blue}] {bytes}/{total_bytes} ({eta})";
+
+pub struct OpenPGPTool {
     pub tpk: TPK,
 }
 
-impl OpenPGPClient {
+impl OpenPGPTool {
-    pub fn from_file(file: &str) -> XResult<OpenPGPClient> {
+    pub fn from_file(file: &str) -> XResult<OpenPGPTool> {
-        Ok(OpenPGPClient{
+        Ok(OpenPGPTool{
             tpk: TPK::from_file(std::path::Path::new(file))?,
         })
     }
 
-    pub fn from_bytes(bs: &[u8]) -> XResult<OpenPGPClient> {
+    pub fn from_bytes(bs: &[u8]) -> XResult<OpenPGPTool> {
-        Ok(OpenPGPClient{
+        Ok(OpenPGPTool{
             tpk: TPK::from_bytes(&bs)?,
         })
     }
 
     pub fn encrypt_file(&self, from_file: &str, to_file: &str, armor: bool) -> XResult<()> {
+        if Path::new(to_file).exists() {
+            return Err(new_box_error(&format!("To file exists: {}", to_file)));
+        }
+
         let recipient: Recipient = match self.tpk.keys_valid()
             .key_flags(KeyFlags::default().set_encrypt_at_rest(true).set_encrypt_for_transport(true))
             .map(|(_, _, key)| key.into())
@@ -51,15 +66,36 @@ impl OpenPGPClient {
         let message = if armor {
             Message::new(armor::Writer::new(std::io::stdout(), armor::Kind::Message, &[])?)
         } else {
-            Message::new(BufWriter::new(File::open(to_file)?))
+            Message::new(BufWriter::new(File::create(to_file)?))
         };
         let encryptor = Encryptor::for_recipient(message, recipient).build()?;
         let mut pgp_encrypt_writer = LiteralWriter::new(encryptor).build()?;
-        // TODO read from from_file
+        let mut from = File::open(from_file)?;
-        pgp_encrypt_writer.write_all(b"Hello world.")?;
+        encrypt_read_write(&mut from, &mut pgp_encrypt_writer)?;
         pgp_encrypt_writer.finalize()?;
                                     
         Ok(())
     }
 }
 
+fn encrypt_read_write(file: &mut File, write: &mut dyn Write) -> XResult<()> {
+    let mut buf: [u8; BUFF_SIZE] = [0u8; BUFF_SIZE];
+    let file_len = file.metadata()?.len();
+    let mut read = 0_u64;
+
+    let pb = ProgressBar::new(file_len);
+    pb.set_style(ProgressStyle::default_bar().template(PB_TEMPLATE).progress_chars(PB_PROGRESS));
+
+    loop {
+        let len = match file.read(&mut buf) {
+            Ok(0) => { pb.finish_and_clear(); return Ok(()); },
+            Ok(len) => len,
+            Err(ref e) if e.kind() == ErrorKind::Interrupted => continue,
+            Err(e) => return Err(Box::new(e)),
+        };
+        write.write(&buf[..len])?;
+        read += len as u64;
+        pb.set_position(read);
+    }
+}
+