feat: cmd info works

src/cmd_info.rs

@@ -0,0 +1,34 @@
+use std::fs::File;
+use std::path::PathBuf;
+use rust_util::{information, opt_result, simple_error, XResult};
+use crate::file;
+
+pub fn info(path: PathBuf) -> XResult<()> {
+    let path_display = format!("{}", path.display());
+    let mut file_in = opt_result!(File::open(path), "Open file: {} failed: {}", &path_display);
+    let meta = opt_result!(file::read_tiny_encrypt_meta(&mut file_in), "Read file: {}, failed: {}", &path_display);
+    // println!("{}", serde_json::to_string_pretty(&meta).expect("SHOULD NOT HAPPEN"));
+
+    let mut infos = vec![];
+    infos.push("Tiny Encrypt File Info".to_string());
+    infos.push(format!("File..............: {}", path_display));
+    infos.push(format!("File size.........: {} bytes", meta.file_length));
+    infos.push(format!("Enc file summary..: Version: {}, Agent: {}", meta.version, meta.user_agent));
+    infos.push(format!("Last modified.....: {}", meta.file_last_modified));
+    infos.push(format!("Enc file created..: {}", meta.created));
+    infos.push(format!("Envelops..........: KMS: {}, PGP: {}",
+                       to_yes_or_no(&meta.envelop),
+                       to_yes_or_no(&meta.pgp_envelop)
+    ));
+    meta.pgp_fingerprint.map(|fingerprint| {
+        infos.push(format!("PGP fingerprint...: {}", fingerprint));
+    });
+    infos.push(format!("Encrypted comment.: {}", to_yes_or_no(&meta.encrypted_comment)));
+
+    information!("{}\n", infos.join("\n"));
+    Ok(())
+}
+
+fn to_yes_or_no(opt: &Option<String>) -> String {
+    opt.as_ref().map(|_| "YES".to_string()).unwrap_or_else(|| "NO".to_string())
+}

src/file.rs

@@ -5,7 +5,7 @@ use rust_util::{opt_result, simple_error, XResult};
 
 use crate::spec::TinyEncryptMeta;
 
-fn write_tiny_encrypt_meta<W: Write>(w: &mut W, meta: &TinyEncryptMeta) -> XResult<usize> {
+pub fn write_tiny_encrypt_meta<W: Write>(w: &mut W, meta: &TinyEncryptMeta) -> XResult<usize> {
     let meta_json = opt_result!( serde_json::to_string(meta), "Meta to JSON failed: {}");
     let meta_json_bytes = meta_json.as_bytes();
     let meta_json_bytes_len = meta_json_bytes.len();
@@ -17,7 +17,7 @@ fn write_tiny_encrypt_meta<W: Write>(w: &mut W, meta: &TinyEncryptMeta) -> XResu
     Ok(meta_json_bytes_len + 2 + 4)
 }
 
-fn read_tiny_encrypt_meta<R: Read>(r: &mut R) -> XResult<TinyEncryptMeta> {
+pub fn read_tiny_encrypt_meta<R: Read>(r: &mut R) -> XResult<TinyEncryptMeta> {
     let mut tag_buff = [0_u8; 2];
     opt_result!(r.read_exact(&mut tag_buff), "Read tag failed: {}");
     let tag = u16::from_be_bytes(tag_buff);
@@ -32,8 +32,8 @@ fn read_tiny_encrypt_meta<R: Read>(r: &mut R) -> XResult<TinyEncryptMeta> {
         return simple_error!("Meta too large: {}", length);
     }
 
-    let mut meta_buff = Vec::with_capacity(length as usize);
-    opt_result!( r.read_exact(meta_buff.as_mut_slice()), "Read meta failed: {}");
+    let mut meta_buff = vec![0; length as usize];
+    opt_result!(r.read_exact(meta_buff.as_mut_slice()), "Read meta failed: {}");
 
     Ok(opt_result!(serde_json::from_slice(&meta_buff), "Parse meta failed: {}"))
 }

src/main.rs

@@ -1,13 +1,15 @@
 extern crate core;
 
+use std::fs::File;
 use std::path::PathBuf;
 
 use clap::{Parser, Subcommand};
-use rust_util::information;
+use rust_util::{information, XResult};
 
 mod spec;
 mod crypto;
 mod file;
+mod cmd_info;
 
 #[derive(Debug, Parser)]
 #[command(name = "tiny-encrypt-rs")]
@@ -23,28 +25,33 @@ enum Commands {
     #[command(arg_required_else_help = true, short_flag = 'e')]
     Encrypt {
         /// Files need to be encrypted
-        files: Vec<PathBuf>,
+        paths: Vec<PathBuf>,
     },
     /// Decrypt file(s)
     #[command(arg_required_else_help = true, short_flag = 'd')]
     Decrypt {
         /// Files need to be decrypted
-        files: Vec<PathBuf>,
+        paths: Vec<PathBuf>,
     },
     /// Show file info
     #[command(arg_required_else_help = true, short_flag = 'I')]
     Info {
-        file: PathBuf,
+        path: PathBuf,
     },
 }
 
-fn main() {
+fn main() -> XResult<()> {
     let args = Cli::parse();
     match args.command {
-        Commands::Encrypt { files } => {
-            files.iter().for_each(|f| information!("{:?}", f));
+        Commands::Encrypt { paths } => {
+            paths.iter().for_each(|f| information!("{:?}", f));
+            Ok(())
+        }
+        Commands::Decrypt { .. } => {
+            Ok(())
+        }
+        Commands::Info { path } => {
+            cmd_info::info(path)
         }
-        Commands::Decrypt { .. } => todo!(),
-        Commands::Info { .. } => todo!()
     }
 }

src/spec.rs

@@ -16,7 +16,7 @@ pub struct TinyEncryptMeta {
     pub nonce: String,
     pub file_length: u64,
     pub file_last_modified: u64,
-    pub compress: Option<bool>,
+    pub compress: bool,
 }
 
 pub fn get_user_agent() -> String {