diff options
Diffstat (limited to 'nix-rust')
| -rw-r--r-- | nix-rust/Cargo.lock | 383 | ||||
| -rw-r--r-- | nix-rust/Cargo.toml | 11 | ||||
| -rw-r--r-- | nix-rust/local.mk | 9 | ||||
| -rw-r--r-- | nix-rust/src/c.rs | 77 | ||||
| -rw-r--r-- | nix-rust/src/error.rs | 93 | ||||
| -rw-r--r-- | nix-rust/src/foreign.rs | 14 | ||||
| -rw-r--r-- | nix-rust/src/lib.rs | 36 | ||||
| -rw-r--r-- | nix-rust/src/nar.rs | 126 | ||||
| -rw-r--r-- | nix-rust/src/store/binary_cache_store.rs | 48 | ||||
| -rw-r--r-- | nix-rust/src/store/mod.rs | 17 | ||||
| -rw-r--r-- | nix-rust/src/store/path.rs | 224 | ||||
| -rw-r--r-- | nix-rust/src/store/path_info.rs | 70 | ||||
| -rw-r--r-- | nix-rust/src/store/store.rs | 53 | ||||
| -rw-r--r-- | nix-rust/src/util/base32.rs | 157 | ||||
| -rw-r--r-- | nix-rust/src/util/mod.rs | 1 |
15 files changed, 1281 insertions, 38 deletions
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b/nix-rust/Cargo.toml index 40b6b7d50..1372e5a73 100644 --- a/nix-rust/Cargo.toml +++ b/nix-rust/Cargo.toml @@ -10,3 +10,14 @@ crate-type = ["cdylib"] [dependencies] libc = "0.2" +#futures-preview = { version = "=0.3.0-alpha.19" } +#hyper = "0.13.0-alpha.4" +#http = "0.1" +#tokio = { version = "0.2.0-alpha.6", default-features = false, features = ["rt-full"] } +lazy_static = "1.4" +#byteorder = "1.3" + +[dev-dependencies] +hex = "0.3" +assert_matches = "1.3" +proptest = "0.9" diff --git a/nix-rust/local.mk b/nix-rust/local.mk index 7645d5394..1e006e500 100644 --- a/nix-rust/local.mk +++ b/nix-rust/local.mk @@ -18,7 +18,7 @@ libnixrust_LDFLAGS_USE += -Wl,-rpath,$(abspath $(d)/target/$(RUST_DIR)) libnixrust_LDFLAGS_USE_INSTALLED += -Wl,-rpath,$(libdir) endif -$(libnixrust_PATH): $(wildcard $(d)/src/*.rs) $(d)/Cargo.toml +$(libnixrust_PATH): $(call rwildcard, $(d)/src, *.rs) $(d)/Cargo.toml $(trace-gen) cd nix-rust && CARGO_HOME=$$(if [[ -d vendor ]]; then echo vendor; fi) \ $(libnixrust_BUILD_FLAGS) \ cargo build $(RUST_MODE) $$(if [[ -d vendor ]]; then echo --offline; fi) \ @@ -36,3 +36,10 @@ clean: clean-rust clean-rust: $(suppress) rm -rfv nix-rust/target + +ifneq ($(OS), Darwin) +check: rust-tests + +rust-tests: + cd nix-rust && CARGO_HOME=$$(if [[ -d vendor ]]; then echo vendor; fi) cargo test --release $$(if [[ -d vendor ]]; then echo --offline; fi) +endif diff --git a/nix-rust/src/c.rs b/nix-rust/src/c.rs new file mode 100644 index 000000000..c1358545f --- /dev/null +++ b/nix-rust/src/c.rs @@ -0,0 +1,77 @@ +use super::{error, store::path, store::StorePath, util}; + +#[no_mangle] +pub unsafe extern "C" fn ffi_String_new(s: &str, out: *mut String) { + // FIXME: check whether 's' is valid UTF-8? + out.write(s.to_string()) +} + +#[no_mangle] +pub unsafe extern "C" fn ffi_String_drop(self_: *mut String) { + std::ptr::drop_in_place(self_); +} + +#[no_mangle] +pub extern "C" fn ffi_StorePath_new( + path: &str, + store_dir: &str, +) -> Result<StorePath, error::CppException> { + StorePath::new(std::path::Path::new(path), std::path::Path::new(store_dir)) + .map_err(|err| err.into()) +} + +#[no_mangle] +pub extern "C" fn ffi_StorePath_new2( + hash: &[u8; crate::store::path::STORE_PATH_HASH_BYTES], + name: &str, +) -> Result<StorePath, error::CppException> { + StorePath::from_parts(*hash, name).map_err(|err| err.into()) +} + +#[no_mangle] +pub extern "C" fn ffi_StorePath_fromBaseName( + base_name: &str, +) -> Result<StorePath, error::CppException> { + StorePath::new_from_base_name(base_name).map_err(|err| err.into()) +} + +#[no_mangle] +pub unsafe extern "C" fn ffi_StorePath_drop(self_: *mut StorePath) { + std::ptr::drop_in_place(self_); +} + +#[no_mangle] +pub extern "C" fn ffi_StorePath_to_string(self_: &StorePath) -> Vec<u8> { + let mut buf = vec![0; path::STORE_PATH_HASH_CHARS + 1 + self_.name.name().len()]; + util::base32::encode_into(self_.hash.hash(), &mut buf[0..path::STORE_PATH_HASH_CHARS]); + buf[path::STORE_PATH_HASH_CHARS] = b'-'; + buf[path::STORE_PATH_HASH_CHARS + 1..].clone_from_slice(self_.name.name().as_bytes()); + buf +} + +#[no_mangle] +pub extern "C" fn ffi_StorePath_less_than(a: &StorePath, b: &StorePath) -> bool { + a < b +} + +#[no_mangle] +pub extern "C" fn ffi_StorePath_eq(a: &StorePath, b: &StorePath) -> bool { + a == b +} + +#[no_mangle] +pub extern "C" fn ffi_StorePath_clone(self_: &StorePath) -> StorePath { + self_.clone() +} + +#[no_mangle] +pub extern "C" fn ffi_StorePath_name(self_: &StorePath) -> &str { + self_.name.name() +} + +#[no_mangle] +pub extern "C" fn ffi_StorePath_hash_data( + self_: &StorePath, +) -> &[u8; crate::store::path::STORE_PATH_HASH_BYTES] { + self_.hash.hash() +} diff --git a/nix-rust/src/error.rs b/nix-rust/src/error.rs index 519007ea0..bb0c9a933 100644 --- a/nix-rust/src/error.rs +++ b/nix-rust/src/error.rs @@ -1,8 +1,31 @@ +use std::fmt; + #[derive(Debug)] pub enum Error { + InvalidPath(crate::store::StorePath), + BadStorePath(std::path::PathBuf), + NotInStore(std::path::PathBuf), + BadNarInfo, + BadBase32, + StorePathNameEmpty, + StorePathNameTooLong, + BadStorePathName, + NarSizeFieldTooBig, + BadNarString, + BadNarPadding, + BadNarVersionMagic, + MissingNarOpenTag, + MissingNarCloseTag, + MissingNarField, + BadNarField(String), + BadExecutableField, IOError(std::io::Error), + #[cfg(unused)] + HttpError(hyper::error::Error), Misc(String), + #[cfg(not(test))] Foreign(CppException), + BadTarFileMemberName(String), } impl From<std::io::Error> for Error { @@ -11,21 +34,85 @@ impl From<std::io::Error> for Error { } } +#[cfg(unused)] +impl From<hyper::error::Error> for Error { + fn from(err: hyper::error::Error) -> Self { + Error::HttpError(err) + } +} + +impl fmt::Display for Error { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + Error::InvalidPath(_) => write!(f, "invalid path"), + Error::BadNarInfo => write!(f, ".narinfo file is corrupt"), + Error::BadStorePath(path) => write!(f, "path '{}' is not a store path", path.display()), + Error::NotInStore(path) => { + write!(f, "path '{}' is not in the Nix store", path.display()) + } + Error::BadBase32 => write!(f, "invalid base32 string"), + Error::StorePathNameEmpty => write!(f, "store path name is empty"), + Error::StorePathNameTooLong => { + write!(f, "store path name is longer than 211 characters") + } + Error::BadStorePathName => write!(f, "store path name contains forbidden character"), + Error::NarSizeFieldTooBig => write!(f, "size field in NAR is too big"), + Error::BadNarString => write!(f, "NAR string is not valid UTF-8"), + Error::BadNarPadding => write!(f, "NAR padding is not zero"), + Error::BadNarVersionMagic => write!(f, "unsupported NAR version"), + Error::MissingNarOpenTag => write!(f, "NAR open tag is missing"), + Error::MissingNarCloseTag => write!(f, "NAR close tag is missing"), + Error::MissingNarField => write!(f, "expected NAR field is missing"), + Error::BadNarField(s) => write!(f, "unrecognized NAR field '{}'", s), + Error::BadExecutableField => write!(f, "bad 'executable' field in NAR"), + Error::IOError(err) => write!(f, "I/O error: {}", err), + #[cfg(unused)] + Error::HttpError(err) => write!(f, "HTTP error: {}", err), + #[cfg(not(test))] + Error::Foreign(_) => write!(f, "<C++ exception>"), // FIXME + Error::Misc(s) => write!(f, "{}", s), + Error::BadTarFileMemberName(s) => { + write!(f, "tar archive contains illegal file name '{}'", s) + } + } + } +} + +#[cfg(not(test))] impl From<Error> for CppException { fn from(err: Error) -> Self { match err { Error::Foreign(ex) => ex, - Error::Misc(s) => unsafe { make_error(&s) }, - Error::IOError(err) => unsafe { make_error(&err.to_string()) }, + _ => CppException::new(&err.to_string()), } } } +#[cfg(not(test))] #[repr(C)] #[derive(Debug)] pub struct CppException(*const libc::c_void); // == std::exception_ptr* +#[cfg(not(test))] +impl CppException { + fn new(s: &str) -> Self { + Self(unsafe { make_error(s) }) + } +} + +#[cfg(not(test))] +impl Drop for CppException { + fn drop(&mut self) { + unsafe { + destroy_error(self.0); + } + } +} + +#[cfg(not(test))] extern "C" { #[allow(improper_ctypes)] // YOLO - fn make_error(s: &str) -> CppException; + fn make_error(s: &str) -> *const libc::c_void; + + fn destroy_error(exc: *const libc::c_void); } diff --git a/nix-rust/src/foreign.rs b/nix-rust/src/foreign.rs deleted file mode 100644 index 7bce7753c..000000000 --- a/nix-rust/src/foreign.rs +++ /dev/null @@ -1,14 +0,0 @@ -/// A wrapper around Nix's Source class that provides the Read trait. -#[repr(C)] -pub struct Source { - fun: extern "C" fn(this: *mut libc::c_void, data: &mut [u8]) -> usize, - this: *mut libc::c_void, -} - -impl std::io::Read for Source { - fn read(&mut self, buf: &mut [u8]) -> std::result::Result<usize, std::io::Error> { - let n = (self.fun)(self.this, buf); - assert!(n <= buf.len()); - Ok(n) - } -} diff --git a/nix-rust/src/lib.rs b/nix-rust/src/lib.rs index a25a791e1..e62613ba8 100644 --- a/nix-rust/src/lib.rs +++ b/nix-rust/src/lib.rs @@ -1,24 +1,20 @@ -mod error; -mod foreign; +#[macro_use] +extern crate lazy_static; -pub use error::Error; +#[cfg(test)] +#[macro_use] +extern crate assert_matches; -pub struct CBox<T> { - pub ptr: *mut libc::c_void, - phantom: std::marker::PhantomData<T>, -} +#[cfg(test)] +#[macro_use] +extern crate proptest; -impl<T> CBox<T> { - fn new(t: T) -> Self { - unsafe { - let size = std::mem::size_of::<T>(); - let ptr = libc::malloc(size); - *(ptr as *mut T) = t; // FIXME: probably UB - Self { - ptr, - phantom: std::marker::PhantomData, - } - } - } -} +#[cfg(not(test))] +mod c; +mod error; +#[cfg(unused)] +mod nar; +mod store; +mod util; +pub use error::Error; diff --git a/nix-rust/src/nar.rs b/nix-rust/src/nar.rs new file mode 100644 index 000000000..cb520935e --- /dev/null +++ b/nix-rust/src/nar.rs @@ -0,0 +1,126 @@ +use crate::Error; +use byteorder::{LittleEndian, ReadBytesExt}; +use std::convert::TryFrom; +use std::io::Read; + +pub fn parse<R: Read>(input: &mut R) -> Result<(), Error> { + if String::read(input)? != NAR_VERSION_MAGIC { + return Err(Error::BadNarVersionMagic); + } + + parse_file(input) +} + +const NAR_VERSION_MAGIC: &str = "nix-archive-1"; + +fn parse_file<R: Read>(input: &mut R) -> Result<(), Error> { + if String::read(input)? != "(" { + return Err(Error::MissingNarOpenTag); + } + + if String::read(input)? != "type" { + return Err(Error::MissingNarField); + } + + match String::read(input)?.as_ref() { + "regular" => { + let mut _executable = false; + let mut tag = String::read(input)?; + if tag == "executable" { + _executable = true; + if String::read(input)? != "" { + return Err(Error::BadExecutableField); + } + tag = String::read(input)?; + } + if tag != "contents" { + return Err(Error::MissingNarField); + } + let _contents = Vec::<u8>::read(input)?; + if String::read(input)? != ")" { + return Err(Error::MissingNarCloseTag); + } + } + "directory" => loop { + match String::read(input)?.as_ref() { + "entry" => { + if String::read(input)? != "(" { + return Err(Error::MissingNarOpenTag); + } + if String::read(input)? != "name" { + return Err(Error::MissingNarField); + } + let _name = String::read(input)?; + if String::read(input)? != "node" { + return Err(Error::MissingNarField); + } + parse_file(input)?; + let tag = String::read(input)?; + if tag != ")" { + return Err(Error::MissingNarCloseTag); + } + } + ")" => break, + s => return Err(Error::BadNarField(s.into())), + } + }, + "symlink" => { + if String::read(input)? != "target" { + return Err(Error::MissingNarField); + } + let _target = String::read(input)?; + if String::read(input)? != ")" { + return Err(Error::MissingNarCloseTag); + } + } + s => return Err(Error::BadNarField(s.into())), + } + + Ok(()) +} + +trait Deserialize: Sized { + fn read<R: Read>(input: &mut R) -> Result<Self, Error>; +} + +impl Deserialize for String { + fn read<R: Read>(input: &mut R) -> Result<Self, Error> { + let buf = Deserialize::read(input)?; + Ok(String::from_utf8(buf).map_err(|_| Error::BadNarString)?) + } +} + +impl Deserialize for Vec<u8> { + fn read<R: Read>(input: &mut R) -> Result<Self, Error> { + let n: usize = Deserialize::read(input)?; + let mut buf = vec![0; n]; + input.read_exact(&mut buf)?; + skip_padding(input, n)?; + Ok(buf) + } +} + +fn skip_padding<R: Read>(input: &mut R, len: usize) -> Result<(), Error> { + if len % 8 != 0 { + let mut buf = [0; 8]; + let buf = &mut buf[0..8 - (len % 8)]; + input.read_exact(buf)?; + if !buf.iter().all(|b| *b == 0) { + return Err(Error::BadNarPadding); + } + } + Ok(()) +} + +impl Deserialize for u64 { + fn read<R: Read>(input: &mut R) -> Result<Self, Error> { + Ok(input.read_u64::<LittleEndian>()?) + } +} + +impl Deserialize for usize { + fn read<R: Read>(input: &mut R) -> Result<Self, Error> { + let n: u64 = Deserialize::read(input)?; + Ok(usize::try_from(n).map_err(|_| Error::NarSizeFieldTooBig)?) + } +} diff --git a/nix-rust/src/store/binary_cache_store.rs b/nix-rust/src/store/binary_cache_store.rs new file mode 100644 index 000000000..9e1e88b7c --- /dev/null +++ b/nix-rust/src/store/binary_cache_store.rs @@ -0,0 +1,48 @@ +use super::{PathInfo, Store, StorePath}; +use crate::Error; +use hyper::client::Client; + +pub struct BinaryCacheStore { + base_uri: String, + client: Client<hyper::client::HttpConnector, hyper::Body>, +} + +impl BinaryCacheStore { + pub fn new(base_uri: String) -> Self { + Self { + base_uri, + client: Client::new(), + } + } +} + +impl Store for BinaryCacheStore { + fn query_path_info( + &self, + path: &StorePath, + ) -> std::pin::Pin<Box<dyn std::future::Future<Output = Result<PathInfo, Error>> + Send>> { + let uri = format!("{}/{}.narinfo", self.base_uri.clone(), path.hash); + let path = path.clone(); + let client = self.client.clone(); + let store_dir = self.store_dir().to_string(); + + Box::pin(async move { + let response = client.get(uri.parse::<hyper::Uri>().unwrap()).await?; + + if response.status() == hyper::StatusCode::NOT_FOUND + || response.status() == hyper::StatusCode::FORBIDDEN + { + return Err(Error::InvalidPath(path)); + } + + let mut body = response.into_body(); + + let mut bytes = Vec::new(); + while let Some(next) = body.next().await { + bytes.extend(next?); + } + + PathInfo::parse_nar_info(std::str::from_utf8(&bytes).unwrap(), &store_dir) + }) + } +} diff --git a/nix-rust/src/store/mod.rs b/nix-rust/src/store/mod.rs new file mode 100644 index 000000000..da972482c --- /dev/null +++ b/nix-rust/src/store/mod.rs @@ -0,0 +1,17 @@ +pub mod path; + +#[cfg(unused)] +mod binary_cache_store; +#[cfg(unused)] +mod path_info; +#[cfg(unused)] +mod store; + +pub use path::{StorePath, StorePathHash, StorePathName}; + +#[cfg(unused)] +pub use binary_cache_store::BinaryCacheStore; +#[cfg(unused)] +pub use path_info::PathInfo; +#[cfg(unused)] +pub use store::Store; diff --git a/nix-rust/src/store/path.rs b/nix-rust/src/store/path.rs new file mode 100644 index 000000000..2a5170bef --- /dev/null +++ b/nix-rust/src/store/path.rs @@ -0,0 +1,224 @@ +use crate::error::Error; +use crate::util::base32; +use std::fmt; +use std::path::Path; + +#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug)] +pub struct StorePath { + pub hash: StorePathHash, + pub name: StorePathName, +} + +pub const STORE_PATH_HASH_BYTES: usize = 20; +pub const STORE_PATH_HASH_CHARS: usize = 32; + +impl StorePath { + pub fn new(path: &Path, store_dir: &Path) -> Result<Self, Error> { + if path.parent() != Some(store_dir) { + return Err(Error::NotInStore(path.into())); + } + Self::new_from_base_name( + path.file_name() + .ok_or(Error::BadStorePath(path.into()))? + .to_str() + .ok_or(Error::BadStorePath(path.into()))?, + ) + } + + pub fn from_parts(hash: [u8; STORE_PATH_HASH_BYTES], name: &str) -> Result<Self, Error> { + Ok(StorePath { + hash: StorePathHash(hash), + name: StorePathName::new(name)?, + }) + } + + pub fn new_from_base_name(base_name: &str) -> Result<Self, Error> { + if base_name.len() < STORE_PATH_HASH_CHARS + 1 + || base_name.as_bytes()[STORE_PATH_HASH_CHARS] != '-' as u8 + { + return Err(Error::BadStorePath(base_name.into())); + } + + Ok(StorePath { + hash: StorePathHash::new(&base_name[0..STORE_PATH_HASH_CHARS])?, + name: StorePathName::new(&base_name[STORE_PATH_HASH_CHARS + 1..])?, + }) + } +} + +impl fmt::Display for StorePath { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "{}-{}", self.hash, self.name) + } +} + +#[derive(Clone, PartialEq, Eq, Debug)] +pub struct StorePathHash([u8; STORE_PATH_HASH_BYTES]); + +impl StorePathHash { + pub fn new(s: &str) -> Result<Self, Error> { + assert_eq!(s.len(), STORE_PATH_HASH_CHARS); + let v = base32::decode(s)?; + assert_eq!(v.len(), STORE_PATH_HASH_BYTES); + let mut bytes: [u8; 20] = Default::default(); + bytes.copy_from_slice(&v[0..STORE_PATH_HASH_BYTES]); + Ok(Self(bytes)) + } + + pub fn hash<'a>(&'a self) -> &'a [u8; STORE_PATH_HASH_BYTES] { + &self.0 + } +} + +impl fmt::Display for StorePathHash { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + let mut buf = vec![0; STORE_PATH_HASH_CHARS]; + base32::encode_into(&self.0, &mut buf); + f.write_str(std::str::from_utf8(&buf).unwrap()) + } +} + +impl Ord for StorePathHash { + fn cmp(&self, other: &Self) -> std::cmp::Ordering { + // Historically we've sorted store paths by their base32 + // serialization, but our base32 encodes bytes in reverse + // order. So compare them in reverse order as well. + self.0.iter().rev().cmp(other.0.iter().rev()) + } +} + +impl PartialOrd for StorePathHash { + fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> { + Some(self.cmp(other)) + } +} + +#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug)] +pub struct StorePathName(String); + +impl StorePathName { + pub fn new(s: &str) -> Result<Self, Error> { + if s.len() == 0 { + return Err(Error::StorePathNameEmpty); + } + + if s.len() > 211 { + return Err(Error::StorePathNameTooLong); + } + + if s.starts_with('.') + || !s.chars().all(|c| { + c.is_ascii_alphabetic() + || c.is_ascii_digit() + || c == '+' + || c == '-' + || c == '.' + || c == '_' + || c == '?' + || c == '=' + }) + { + return Err(Error::BadStorePathName); + } + + Ok(Self(s.to_string())) + } + + pub fn name<'a>(&'a self) -> &'a str { + &self.0 + } +} + +impl fmt::Display for StorePathName { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str(&self.0) + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_parse() { + let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-konsole-18.12.3"; + let p = StorePath::new_from_base_name(&s).unwrap(); + assert_eq!(p.name.0, "konsole-18.12.3"); + assert_eq!( + p.hash.0, + [ + 0x9f, 0x76, 0x49, 0x20, 0xf6, 0x5d, 0xe9, 0x71, 0xc4, 0xca, 0x46, 0x21, 0xab, 0xff, + 0x9b, 0x44, 0xef, 0x87, 0x0f, 0x3c + ] + ); + } + + #[test] + fn test_no_name() { + let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-"; + assert_matches!( + StorePath::new_from_base_name(&s), + Err(Error::StorePathNameEmpty) + ); + } + + #[test] + fn test_no_dash() { + let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz"; + assert_matches!( + StorePath::new_from_base_name(&s), + Err(Error::BadStorePath(_)) + ); + } + + #[test] + fn test_short_hash() { + let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxl-konsole-18.12.3"; + assert_matches!( + StorePath::new_from_base_name(&s), + Err(Error::BadStorePath(_)) + ); + } + + #[test] + fn test_invalid_hash() { + let s = "7h7qgvs4kgzsn8e6rb273saxyqh4jxlz-konsole-18.12.3"; + assert_matches!(StorePath::new_from_base_name(&s), Err(Error::BadBase32)); + } + + #[test] + fn test_long_name() { + let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; + assert_matches!(StorePath::new_from_base_name(&s), Ok(_)); + } + + #[test] + fn test_too_long_name() { + let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; + assert_matches!( + StorePath::new_from_base_name(&s), + Err(Error::StorePathNameTooLong) + ); + } + + #[test] + fn test_bad_name() { + let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-foo bar"; + assert_matches!( + StorePath::new_from_base_name(&s), + Err(Error::BadStorePathName) + ); + + let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-kónsole"; + assert_matches!( + StorePath::new_from_base_name(&s), + Err(Error::BadStorePathName) + ); + } + + #[test] + fn test_roundtrip() { + let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-konsole-18.12.3"; + assert_eq!(StorePath::new_from_base_name(&s).unwrap().to_string(), s); + } +} diff --git a/nix-rust/src/store/path_info.rs b/nix-rust/src/store/path_info.rs new file mode 100644 index 000000000..c2903ed29 --- /dev/null +++ b/nix-rust/src/store/path_info.rs @@ -0,0 +1,70 @@ +use crate::store::StorePath; +use crate::Error; +use std::collections::BTreeSet; + +#[derive(Clone, Debug)] +pub struct PathInfo { + pub path: StorePath, + pub references: BTreeSet<StorePath>, + pub nar_size: u64, + pub deriver: Option<StorePath>, + + // Additional binary cache info. + pub url: Option<String>, + pub compression: Option<String>, + pub file_size: Option<u64>, +} + +impl PathInfo { + pub fn parse_nar_info(nar_info: &str, store_dir: &str) -> Result<Self, Error> { + let mut path = None; + let mut references = BTreeSet::new(); + let mut nar_size = None; + let mut deriver = None; + let mut url = None; + let mut compression = None; + let mut file_size = None; + + for line in nar_info.lines() { + let colon = line.find(':').ok_or(Error::BadNarInfo)?; + + let (name, value) = line.split_at(colon); + + if !value.starts_with(": ") { + return Err(Error::BadNarInfo); + } + + let value = &value[2..]; + + if name == "StorePath" { + path = Some(StorePath::new(std::path::Path::new(value), store_dir)?); + } else if name == "NarSize" { + nar_size = Some(u64::from_str_radix(value, 10).map_err(|_| Error::BadNarInfo)?); + } else if name == "References" { + if !value.is_empty() { + for r in value.split(' ') { + references.insert(StorePath::new_from_base_name(r)?); + } + } + } else if name == "Deriver" { + deriver = Some(StorePath::new_from_base_name(value)?); + } else if name == "URL" { + url = Some(value.into()); + } else if name == "Compression" { + compression = Some(value.into()); + } else if name == "FileSize" { + file_size = Some(u64::from_str_radix(value, 10).map_err(|_| Error::BadNarInfo)?); + } + } + + Ok(PathInfo { + path: path.ok_or(Error::BadNarInfo)?, + references, + nar_size: nar_size.ok_or(Error::BadNarInfo)?, + deriver, + url: Some(url.ok_or(Error::BadNarInfo)?), + compression, + file_size, + }) + } +} diff --git a/nix-rust/src/store/store.rs b/nix-rust/src/store/store.rs new file mode 100644 index 000000000..c33dc4a90 --- /dev/null +++ b/nix-rust/src/store/store.rs @@ -0,0 +1,53 @@ +use super::{PathInfo, StorePath}; +use crate::Error; +use std::collections::{BTreeMap, BTreeSet}; +use std::path::Path; + +pub trait Store: Send + Sync { + fn store_dir(&self) -> &str { + "/nix/store" + } + + fn query_path_info( + &self, + store_path: &StorePath, + ) -> std::pin::Pin<Box<dyn std::future::Future<Output = Result<PathInfo, Error>> + Send>>; +} + +impl dyn Store { + pub fn parse_store_path(&self, path: &Path) -> Result<StorePath, Error> { + StorePath::new(path, self.store_dir()) + } + + pub async fn compute_path_closure( + &self, + roots: BTreeSet<StorePath>, + ) -> Result<BTreeMap<StorePath, PathInfo>, Error> { + let mut done = BTreeSet::new(); + let mut result = BTreeMap::new(); + let mut pending = vec![]; + + for root in roots { + pending.push(self.query_path_info(&root)); + done.insert(root); + } + + while !pending.is_empty() { + let (info, _, remaining) = futures::future::select_all(pending).await; + pending = remaining; + + let info = info?; + + for path in &info.references { + if !done.contains(path) { + pending.push(self.query_path_info(&path)); + done.insert(path.clone()); + } + } + + result.insert(info.path.clone(), info); + } + + Ok(result) + } +} diff --git a/nix-rust/src/util/base32.rs b/nix-rust/src/util/base32.rs new file mode 100644 index 000000000..ba7368933 --- /dev/null +++ b/nix-rust/src/util/base32.rs @@ -0,0 +1,157 @@ +use crate::error::Error; + +pub fn encoded_len(input_len: usize) -> usize { + if input_len == 0 { + 0 + } else { + (input_len * 8 - 1) / 5 + 1 + } +} + +pub fn decoded_len(input_len: usize) -> usize { + input_len * 5 / 8 +} + +static BASE32_CHARS: &'static [u8; 32] = &b"0123456789abcdfghijklmnpqrsvwxyz"; + +lazy_static! { + static ref BASE32_CHARS_REVERSE: Box<[u8; 256]> = { + let mut xs = [0xffu8; 256]; + for (n, c) in BASE32_CHARS.iter().enumerate() { + xs[*c as usize] = n as u8; + } + Box::new(xs) + }; +} + +pub fn encode(input: &[u8]) -> String { + let mut buf = vec![0; encoded_len(input.len())]; + encode_into(input, &mut buf); + std::str::from_utf8(&buf).unwrap().to_string() +} + +pub fn encode_into(input: &[u8], output: &mut [u8]) { + let len = encoded_len(input.len()); + assert_eq!(len, output.len()); + + let mut nr_bits_left: usize = 0; + let mut bits_left: u16 = 0; + let mut pos = len; + + for b in input { + bits_left |= (*b as u16) << nr_bits_left; + nr_bits_left += 8; + while nr_bits_left > 5 { + output[pos - 1] = BASE32_CHARS[(bits_left & 0x1f) as usize]; + pos -= 1; + bits_left >>= 5; + nr_bits_left -= 5; + } + } + + if nr_bits_left > 0 { + output[pos - 1] = BASE32_CHARS[(bits_left & 0x1f) as usize]; + pos -= 1; + } + + assert_eq!(pos, 0); +} + +pub fn decode(input: &str) -> Result<Vec<u8>, crate::Error> { + let mut res = Vec::with_capacity(decoded_len(input.len())); + + let mut nr_bits_left: usize = 0; + let mut bits_left: u16 = 0; + + for c in input.chars().rev() { + let b = BASE32_CHARS_REVERSE[c as usize]; + if b == 0xff { + return Err(Error::BadBase32); + } + bits_left |= (b 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()); + } + } +} diff --git a/nix-rust/src/util/mod.rs b/nix-rust/src/util/mod.rs new file mode 100644 index 000000000..eaad9d406 --- /dev/null +++ b/nix-rust/src/util/mod.rs @@ -0,0 +1 @@ +pub mod base32; |