🚧 Just fix intermediate state

Cargo.lock

@@ -42,6 +42,11 @@ name = "byte-tools"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "byteorder"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "cfg-if"
 version = "0.1.2"
@@ -148,6 +153,11 @@ dependencies = [
  "typenum 1.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "hex"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "hmac"
 version = "0.1.1"
@@ -174,13 +184,14 @@ dependencies = [
 
 [[package]]
 name = "keyring"
-version = "0.5.1"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "advapi32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.29.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rpassword 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rpassword 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "secret-service 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -320,17 +331,6 @@ dependencies = [
  "redox_syscall 0.1.33 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "rpassword"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
- "termios 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "rpassword"
 version = "2.0.0"
@@ -378,10 +378,11 @@ dependencies = [
  "base32 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.29.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ctrlc 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "keyring 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "keyring 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "oath 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rpassword 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -491,14 +492,6 @@ dependencies = [
  "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "termios"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "textwrap"
 version = "0.9.0"
@@ -580,6 +573,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4efd02e230a02e18f92fc2735f44597385ed02ad8f831e7c1c1156ee5e1ab3a5"
 "checksum bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b3c30d3802dfb7281680d6285f2ccdaa8c2d8fee41f93805dba5c4cf50dc23cf"
 "checksum byte-tools 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0919189ba800c7ffe8778278116b7e0de3905ab81c72abb69c85cbfef7991279"
+"checksum byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "652805b7e73fada9d85e9a6682a4abd490cb52d96aeecc12e33a0de34dfd0d23"
 "checksum cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d4c819a1287eb618df47cc647173c5c4c66ba19d888a6e50d605672aed3140de"
 "checksum clap 2.29.0 (registry+https://github.com/rust-lang/crates.io-index)" = "110d43e343eb29f4f51c1db31beb879d546db27998577e5715270a54bcf41d3f"
 "checksum constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8ff012e225ce166d4422e0e78419d901719760f62ae2b7969ca6b564d1b54a9e"
@@ -594,10 +588,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum fuchsia-zircon-sys 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "08b3a6f13ad6b96572b53ce7af74543132f1a7055ccceb6d073dd36c54481859"
 "checksum gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)" = "5e33ec290da0d127825013597dbdfc28bee4964690c7ce1166cbc2a7bd08b1bb"
 "checksum generic-array 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "dbe043cf9b85297937897087de81f590361686e1ac2d4d471b45435de5dfb6a6"
+"checksum hex 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "459d3cf58137bb02ad4adeef5036377ff59f066dbb82517b7192e3a5462a2abc"
 "checksum hmac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "bdb5aa9647ba4711e9d6968dc1c810cd23989ed435443ca962e1bf6d8b8b83ff"
 "checksum itoa 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8324a32baf01e2ae060e9de58ed0bc2320c9a2833491ee36cd3b4c414de4db8c"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-"checksum keyring 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a13a4970024d20522520ecf2218f31fa9fc12dd4497a3901f79a137b425a184e"
+"checksum keyring 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c503cc96b828521df71d8ef94edb17d3b7c0ef2caededd064b78fc5e1205de7b"
 "checksum libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)" = "36fbc8a8929c632868295d0178dd8f63fc423fd7537ad0738372bd010b3ac9b0"
 "checksum nix 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a2c5afeb0198ec7be8569d666644b574345aad2e95a53baf3a532da3e0f3fb32"
 "checksum nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "9a2228dca57108069a5262f2ed8bd2e82496d2e074a06d1ccc7ce1687b6ae0a2"
@@ -614,7 +609,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rand 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9d5f78082e6a6d042862611e9640cf20776185fee506cf6cf67e93c6225cee31"
 "checksum redox_syscall 0.1.33 (registry+https://github.com/rust-lang/crates.io-index)" = "07b8f011e3254d5a9b318fde596d409a0001c9ae4c6e7907520c2eaa4d988c99"
 "checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
-"checksum rpassword 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8f0eee8d16609fa0ec2a13c8d812fc6049f71d3cdd93f6f713fedf6397868c5c"
 "checksum rpassword 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d127299b02abda51634f14025aec43ae87a7aa7a95202b6a868ec852607d1451"
 "checksum rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)" = "f76d05d3993fd5f4af9434e8e436db163a12a9d40e1a58a726f27a01dfd12a2a"
 "checksum rust-gmp 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4cd7d57377b309a73f69e164109203aa9ab3fee6ea68ac5fb76e2edb50662e9b"
@@ -631,7 +625,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
 "checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
-"checksum termios 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d5d9cf598a6d7ce700a4e6a9199da127e6819a61e64b68609683cc9a01b5683a"
 "checksum textwrap 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c0b59b6b4b44d867f1370ef1bd91bfb262bf07bf0ae65c202ea2fbc16153b693"
 "checksum time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)" = "d5d788d3aa77bc0ef3e9621256885555368b47bd495c13dd2e7413c89f845520"
 "checksum typenum 1.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "13a99dc6780ef33c78780b826cf9d2a78840b72cae9474de4bcaf9051e60ebbd"

Cargo.toml

@@ -14,14 +14,18 @@ version = "0.2.1"
 [dependencies]
 base32 = "0.3.1"
 clap = "^2.29.0"
-ctrlc = { version = "3.0", features = ["termination"] }
+keyring = "0.6.0"
-keyring = "0.5.1"
 oath = "0.10.2"
 rand = "0.4.1"
 rpassword = "2.0.0"
+rust-crypto = "0.2.36"
 serde = "1.0.24"
 serde_derive = "1.0.24"
 serde_json = "1.0.8"
+
+[dependencies.ctrlc]
+features = ["termination"]
+version = "3.0"
 [profile.release]
 debug = false
 lto = true

TODO

@@ -0,0 +1,21 @@
+# Change approach for saving and loading data
+
+## On load
+
+1. Read encrypted data into memory
+2. Invoke decrypt function, which takes IV from the beginning of the data
+3. Retrieve secret
+4. Decrypt data
+5. Unserialize data
+
+## On save
+
+1. Serialize data
+2. Generate IV
+3. Retrieve secret
+4. Encrypt data
+5. Concatenate IV + encrypted data
+6. Save data to file
+
+# Implement secret retrieval from OS's keyring
+

src/bin/totp.rs

@@ -22,12 +22,19 @@ struct Cli {
 
 impl Cli {
     fn new() -> Self {
-        let db = JsonDatabase::new(Self::get_database_path());
+        let secret = Self::get_secret();
+        let db = JsonDatabase::new(Self::get_database_path(), &secret);
         Self {
             app: RusTOTPony::new(db),
         }
     }
 
+    fn get_secret() -> String {
+        return rpassword::prompt_password_stdout("Enter your database pass: ").unwrap();
+    }
+
+    // fn get_secret_from_storage() -> String { }
+
     fn run(&mut self) {
         match self.get_cli_api_matches().subcommand() {
             ("dash", Some(_)) => {

src/lib.rs

@@ -1,4 +1,5 @@
 extern crate base32;
+extern crate crypto;
 extern crate oath;
 extern crate rand;
 extern crate serde_json;
@@ -6,6 +7,11 @@ extern crate serde_json;
 #[macro_use]
 extern crate serde_derive;
 
+use crypto::{aes, blockmodes, buffer, symmetriccipher};
+use crypto::buffer::{BufferResult, ReadBuffer, WriteBuffer};
+
+use rand::{OsRng, Rng};
+
 use std::collections::HashMap;
 use std::fs::{create_dir_all, File, OpenOptions};
 use std::io::ErrorKind;
@@ -121,11 +127,15 @@ struct DatabaseContentSchema {
 
 pub struct JsonDatabase {
     file_path: PathBuf,
+    secret: String,
 }
 
 impl JsonDatabase {
-    pub fn new(path: PathBuf) -> JsonDatabase {
+    pub fn new(path: PathBuf, secret: &str) -> JsonDatabase {
-        JsonDatabase { file_path: path }
+        JsonDatabase {
+            file_path: path,
+            secret: String::from(secret),
+        }
     }
 
     fn read_database_file(&self) -> JsonDatabaseSchema {
@@ -147,6 +157,105 @@ impl JsonDatabase {
         serde_json::to_writer(file, &content).expect("Couldn't write JSON data to database file");
     }
 
+    // Encrypt a buffer with the given key and iv using
+    // AES-256/CBC/Pkcs encryption.
+    fn encrypt(
+        data: &[u8],
+        key: &[u8],
+        iv: &[u8],
+    ) -> Result<Vec<u8>, symmetriccipher::SymmetricCipherError> {
+        // Create an encryptor instance of the best performing
+        // type available for the platform.
+        let mut encryptor =
+            aes::cbc_encryptor(aes::KeySize::KeySize256, key, iv, blockmodes::PkcsPadding);
+
+        // Each encryption operation encrypts some data from
+        // an input buffer into an output buffer. Those buffers
+        // must be instances of RefReaderBuffer and RefWriteBuffer
+        // (respectively) which keep track of how much data has been
+        // read from or written to them.
+        let mut final_result = Vec::<u8>::new();
+        let mut read_buffer = buffer::RefReadBuffer::new(data);
+        let mut buffer = [0; 4096];
+        let mut write_buffer = buffer::RefWriteBuffer::new(&mut buffer);
+
+        // Each encryption operation will "make progress". "Making progress"
+        // is a bit loosely defined, but basically, at the end of each operation
+        // either BufferUnderflow or BufferOverflow will be returned (unless
+        // there was an error). If the return value is BufferUnderflow, it means
+        // that the operation ended while wanting more input data. If the return
+        // value is BufferOverflow, it means that the operation ended because it
+        // needed more space to output data. As long as the next call to the encryption
+        // operation provides the space that was requested (either more input data
+        // or more output space), the operation is guaranteed to get closer to
+        // completing the full operation - ie: "make progress".
+        //
+        // Here, we pass the data to encrypt to the enryptor along with a fixed-size
+        // output buffer. The 'true' flag indicates that the end of the data that
+        // is to be encrypted is included in the input buffer (which is true, since
+        // the input data includes all the data to encrypt). After each call, we copy
+        // any output data to our result Vec. If we get a BufferOverflow, we keep
+        // going in the loop since it means that there is more work to do. We can
+        // complete as soon as we get a BufferUnderflow since the encryptor is telling
+        // us that it stopped processing data due to not having any more data in the
+        // input buffer.
+        loop {
+            let result = try!(encryptor.encrypt(&mut read_buffer, &mut write_buffer, true));
+
+            // "write_buffer.take_read_buffer().take_remaining()" means:
+            // from the writable buffer, create a new readable buffer which
+            // contains all data that has been written, and then access all
+            // of that data as a slice.
+            final_result.extend(
+                write_buffer
+                    .take_read_buffer()
+                    .take_remaining()
+                    .iter()
+                    .map(|&i| i),
+            );
+
+            match result {
+                BufferResult::BufferUnderflow => break,
+                BufferResult::BufferOverflow => {}
+            }
+        }
+
+        Ok(final_result)
+    }
+
+    // Decrypts a buffer with the given key and iv using
+    // AES-256/CBC/Pkcs encryption.
+    fn decrypt(
+        encrypted_data: &[u8],
+        key: &[u8],
+        iv: &[u8],
+    ) -> Result<Vec<u8>, symmetriccipher::SymmetricCipherError> {
+        let mut decryptor =
+            aes::cbc_decryptor(aes::KeySize::KeySize256, key, iv, blockmodes::PkcsPadding);
+
+        let mut final_result = Vec::<u8>::new();
+        let mut read_buffer = buffer::RefReadBuffer::new(encrypted_data);
+        let mut buffer = [0; 4096];
+        let mut write_buffer = buffer::RefWriteBuffer::new(&mut buffer);
+
+        loop {
+            let result = try!(decryptor.decrypt(&mut read_buffer, &mut write_buffer, true));
+            final_result.extend(
+                write_buffer
+                    .take_read_buffer()
+                    .take_remaining()
+                    .iter()
+                    .map(|&i| i),
+            );
+            match result {
+                BufferResult::BufferUnderflow => break,
+                BufferResult::BufferOverflow => {}
+            }
+        }
+
+        Ok(final_result)
+    }
+
     fn create_database_file(&self) -> Result<File, std::io::Error> {
         let dir = std::env::home_dir().unwrap_or(PathBuf::from("."));
         if let Some(parent_dir) = Path::new(&self.file_path).parent() {