Add base32 encoder/decoder

This commit is contained in:
Eelco Dolstra 2019-09-17 00:18:17 +02:00
parent a1ff43045b
commit cce218f950
9 changed files with 349 additions and 4 deletions

183
nix-rust/Cargo.lock generated
View File

@ -10,6 +10,11 @@ name = "anyhow"
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"checksum rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
@ -1550,11 +1728,13 @@ dependencies = [
"checksum redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)" = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
"checksum regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dc220bd33bdce8f093101afe22a037b8eb0e5af33592e6a9caafff0d4cb81cbd"
"checksum regex-syntax 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)" = "11a7e20d1cce64ef2fed88b66d347f88bd9babb82845b2b858f3edbf59a4f716"
"checksum remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
"checksum reqwest 0.9.22 (registry+https://github.com/rust-lang/crates.io-index)" = "2c2064233e442ce85c77231ebd67d9eca395207dec2127fe0bbedde4bd29a650"
"checksum ring 0.16.9 (registry+https://github.com/rust-lang/crates.io-index)" = "6747f8da1f2b1fabbee1aaa4eb8a11abf9adef0bf58a41cee45db5d59cecdfac"
"checksum rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "4c691c0e608126e00913e33f0ccf3727d5fc84573623b8d65b2df340b5201783"
"checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
"checksum rustls 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b25a18b1bf7387f0145e7f8324e700805aade3842dd3db2e74e4cdeb4677c09e"
"checksum rusty-fork 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3dd93264e10c577503e926bd1430193eeb5d21b059148910082245309b424fae"
"checksum ryu 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bfa8506c1de11c9c4e4c38863ccbe02a305c8188e85a05a784c9e11e1c3910c8"
"checksum scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b42e15e59b18a828bbf5c58ea01debb36b9b096346de35d941dcb89009f24a0d"
"checksum sct 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e3042af939fca8c3453b7af0f1c66e533a15a86169e39de2657310ade8f98d3c"
@ -1573,6 +1753,7 @@ dependencies = [
"checksum syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)" = "dff0acdb207ae2fe6d5976617f887eb1e35a2ba52c13c7234c790960cdad9238"
"checksum synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)" = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
"checksum tar 0.4.26 (registry+https://github.com/rust-lang/crates.io-index)" = "b3196bfbffbba3e57481b6ea32249fbaf590396a52505a2615adbb79d9d826d3"
"checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
"checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
"checksum tokio 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)" = "5a09c0b5bb588872ab2f09afa13ee6e9dac11e10a0ec9e8e3ba39a5a5d530af6"
"checksum tokio-buf 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8fb220f46c53859a4b7ec083e41dec9778ff0b1851c0942b211edb89e0ccdc46"
@ -1598,7 +1779,9 @@ dependencies = [
"checksum uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)" = "90dbc611eb48397705a6b0f6e917da23ae517e4d127123d2cf7674206627d32a"
"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
"checksum version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
"checksum wait-timeout 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9f200f5b12eb75f8c1ed65abd4b2db8a6e1b138a20de009dacee265a2498f3f6"
"checksum want 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b6395efa4784b027708f7451087e647ec73cc74f5d9bc2e418404248d679a230"
"checksum wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b89c3ce4ce14bdc6fb6beaf9ec7928ca331de5df7e5ea278375642a2f478570d"
"checksum wasm-bindgen 0.2.55 (registry+https://github.com/rust-lang/crates.io-index)" = "29ae32af33bacd663a9a28241abecf01f2be64e6a185c6139b04f18b6385c5f2"
"checksum wasm-bindgen-backend 0.2.55 (registry+https://github.com/rust-lang/crates.io-index)" = "1845584bd3593442dc0de6e6d9f84454a59a057722f36f005e44665d6ab19d85"
"checksum wasm-bindgen-macro 0.2.55 (registry+https://github.com/rust-lang/crates.io-index)" = "87fcc747e6b73c93d22c947a6334644d22cfec5abd8b66238484dc2b0aeb9fe4"

View File

@ -16,3 +16,9 @@ futures-preview = { version = "=0.3.0-alpha.18", features = ["compat"] }
reqwest = { version = "0.9", default-features = false, features = ["rustls-tls"] }
http = "0.1"
tokio = { version = "0.1", default-features = false }
lazy_static = "1.4"
[dev-dependencies]
hex = "0.3"
assert_matches = "1.3"
proptest = "0.9"

View File

@ -36,3 +36,8 @@ clean: clean-rust
clean-rust:
$(suppress) rm -rfv nix-rust/target
check: rust-tests
rust-tests:
cd nix-rust && CARGO_HOME=$$(if [[ -d vendor ]]; then echo vendor; fi) RUSTC_BOOTSTRAP=1 cargo test --release $$(if [[ -d vendor ]]; then echo -Z offline; fi)

View File

@ -3,6 +3,7 @@ pub enum Error {
InvalidPath(crate::store::StorePath),
BadStorePath(std::path::PathBuf),
BadNarInfo,
BadBase32,
IOError(std::io::Error),
HttpError(reqwest::Error),
Misc(String),
@ -29,6 +30,7 @@ impl From<Error> for CppException {
Error::BadStorePath(path) => unsafe {
make_error(&format!("path '{}' is not a store path", path.display()))
}, // FIXME
Error::BadBase32 => unsafe { make_error("invalid base32 string") }, // FIXME
Error::IOError(err) => unsafe { make_error(&err.to_string()) },
Error::HttpError(err) => unsafe { make_error(&err.to_string()) },
Error::Foreign(ex) => ex,

View File

@ -1,5 +1,16 @@
#![feature(await_macro, async_await)]
#[macro_use]
extern crate lazy_static;
#[cfg(test)]
#[macro_use]
extern crate assert_matches;
#[cfg(test)]
#[macro_use]
extern crate proptest;
mod c;
mod error;
mod foreign;

View File

@ -12,7 +12,7 @@ pub struct StorePath {
pub const STORE_PATH_HASH_CHARS: usize = 32;
impl StorePath {
pub fn new(path: &Path, store_dir: &str) -> Result<Self, Error> {
pub fn new(path: &Path, _store_dir: &str) -> Result<Self, Error> {
// FIXME: check store_dir
Self::new_short(
path.file_name()

140
nix-rust/src/util/base32.rs Normal file
View File

@ -0,0 +1,140 @@
use crate::error::Error;
use std::collections::HashMap;
pub fn encoded_len(input_len: usize) -> usize {
if input_len == 0 {
0
} else {
(input_len * 8 - 1) / 5 + 1
}
}
static BASE32_CHARS: &'static [u8; 32] = &b"0123456789abcdfghijklmnpqrsvwxyz";
lazy_static! {
static ref BASE32_CHARS_REVERSE: HashMap<char, u8> = BASE32_CHARS
.iter()
.enumerate()
.map(|(n, c)| (*c as char, n as u8))
.collect();
}
pub fn encode(input: &[u8]) -> String {
let mut res = String::new();
res.reserve(encoded_len(input.len()));
let mut nr_bits_left: usize = 0;
let mut bits_left: u16 = 0;
for b in input {
bits_left |= (*b as u16) << nr_bits_left;
nr_bits_left += 8;
while nr_bits_left > 5 {
res.push(BASE32_CHARS[(bits_left & 0x1f) as usize] as char);
bits_left >>= 5;
nr_bits_left -= 5;
}
}
if nr_bits_left > 0 {
res.push(BASE32_CHARS[(bits_left & 0x1f) as usize] as char);
}
res.chars().rev().collect()
}
pub fn decode(input: &str) -> Result<Vec<u8>, crate::Error> {
let mut res = Vec::new();
let mut nr_bits_left: usize = 0;
let mut bits_left: u16 = 0;
for c in input.chars().rev() {
let x = BASE32_CHARS_REVERSE.get(&c).ok_or(Error::BadBase32)?;
bits_left |= (*x as u16) << nr_bits_left;
nr_bits_left += 5;
if nr_bits_left >= 8 {
res.push((bits_left & 0xff) as u8);
bits_left >>= 8;
nr_bits_left -= 8;
}
}
if nr_bits_left > 0 && bits_left != 0 {
return Err(Error::BadBase32);
}
Ok(res)
}
#[cfg(test)]
mod tests {
use super::*;
use hex;
#[test]
fn test_encode() {
assert_eq!(encode(&[]), "");
assert_eq!(
encode(&hex::decode("0839703786356bca59b0f4a32987eb2e6de43ae8").unwrap()),
"x0xf8v9fxf3jk8zln1cwlsrmhqvp0f88"
);
assert_eq!(
encode(
&hex::decode("ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad")
.unwrap()
),
"1b8m03r63zqhnjf7l5wnldhh7c134ap5vpj0850ymkq1iyzicy5s"
);
assert_eq!(
encode(
&hex::decode("ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f")
.unwrap()
),
"2gs8k559z4rlahfx0y688s49m2vvszylcikrfinm30ly9rak69236nkam5ydvly1ai7xac99vxfc4ii84hawjbk876blyk1jfhkbbyx"
);
}
#[test]
fn test_decode() {
assert_eq!(hex::encode(decode("").unwrap()), "");
assert_eq!(
hex::encode(decode("x0xf8v9fxf3jk8zln1cwlsrmhqvp0f88").unwrap()),
"0839703786356bca59b0f4a32987eb2e6de43ae8"
);
assert_eq!(
hex::encode(decode("1b8m03r63zqhnjf7l5wnldhh7c134ap5vpj0850ymkq1iyzicy5s").unwrap()),
"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad"
);
assert_eq!(
hex::encode(decode("2gs8k559z4rlahfx0y688s49m2vvszylcikrfinm30ly9rak69236nkam5ydvly1ai7xac99vxfc4ii84hawjbk876blyk1jfhkbbyx").unwrap()),
"ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f"
);
assert_matches!(
decode("xoxf8v9fxf3jk8zln1cwlsrmhqvp0f88"),
Err(Error::BadBase32)
);
assert_matches!(
decode("2b8m03r63zqhnjf7l5wnldhh7c134ap5vpj0850ymkq1iyzicy5s"),
Err(Error::BadBase32)
);
assert_matches!(decode("2"), Err(Error::BadBase32));
assert_matches!(decode("2gs"), Err(Error::BadBase32));
assert_matches!(decode("2gs8"), Err(Error::BadBase32));
}
proptest! {
#[test]
fn roundtrip(s: Vec<u8>) {
assert_eq!(s, decode(&encode(&s)).unwrap());
}
}
}

View File

@ -1 +1,2 @@
pub mod base32;
pub mod tarfile;

View File

@ -1,6 +1,3 @@
check:
@echo "Warning: Nix has no 'make check'. Please install Nix and run 'make installcheck' instead."
nix_tests = \
init.sh hash.sh lang.sh add.sh simple.sh dependencies.sh \
gc.sh \