From ea8b1ffe61de8030b7887e859145c951c591a7c9 Mon Sep 17 00:00:00 2001
From: Pietro Albini <pietro.albini@ferrous-systems.com>
Date: Thu, 26 Aug 2021 12:35:32 +0200
Subject: [PATCH] pin the stage0 hashes in src/stage0.json

---
 Cargo.lock                        |   2 +
 src/bootstrap/bootstrap.py        |  63 +++---
 src/bootstrap/bootstrap_test.py   |   9 +-
 src/stage0.json                   | 334 ++++++++++++++++++++++++++++++
 src/tools/bump-stage0/Cargo.toml  |   1 +
 src/tools/bump-stage0/src/main.rs |  47 ++++-
 6 files changed, 419 insertions(+), 37 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 21b6e41dba3..c19630a00a3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -226,6 +226,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "curl",
+ "indexmap",
  "serde",
  "serde_json",
  "toml",
@@ -1674,6 +1675,7 @@ checksum = "bc633605454125dec4b66843673f01c7df2b89479b32e0ed634e43a91cff62a5"
 dependencies = [
  "autocfg",
  "hashbrown",
+ "serde",
 ]
 
 [[package]]
diff --git a/src/bootstrap/bootstrap.py b/src/bootstrap/bootstrap.py
index 3160f6c57d8..b086f014518 100644
--- a/src/bootstrap/bootstrap.py
+++ b/src/bootstrap/bootstrap.py
@@ -25,19 +25,17 @@ def support_xz():
     except tarfile.CompressionError:
         return False
 
-def get(url, path, verbose=False, do_verify=True):
-    suffix = '.sha256'
-    sha_url = url + suffix
+def get(base, url, path, checksums, verbose=False, do_verify=True):
     with tempfile.NamedTemporaryFile(delete=False) as temp_file:
         temp_path = temp_file.name
-    with tempfile.NamedTemporaryFile(suffix=suffix, delete=False) as sha_file:
-        sha_path = sha_file.name
 
     try:
         if do_verify:
-            download(sha_path, sha_url, False, verbose)
+            if url not in checksums:
+                raise RuntimeError("src/stage0.json doesn't contain a checksum for {}".format(url))
+            sha256 = checksums[url]
             if os.path.exists(path):
-                if verify(path, sha_path, False):
+                if verify(path, sha256, False):
                     if verbose:
                         print("using already-download file", path)
                     return
@@ -46,23 +44,17 @@ def get(url, path, verbose=False, do_verify=True):
                         print("ignoring already-download file",
                             path, "due to failed verification")
                     os.unlink(path)
-        download(temp_path, url, True, verbose)
-        if do_verify and not verify(temp_path, sha_path, verbose):
+        download(temp_path, "{}/{}".format(base, url), True, verbose)
+        if do_verify and not verify(temp_path, sha256, verbose):
             raise RuntimeError("failed verification")
         if verbose:
             print("moving {} to {}".format(temp_path, path))
         shutil.move(temp_path, path)
     finally:
-        delete_if_present(sha_path, verbose)
-        delete_if_present(temp_path, verbose)
-
-
-def delete_if_present(path, verbose):
-    """Remove the given file if present"""
-    if os.path.isfile(path):
-        if verbose:
-            print("removing", path)
-        os.unlink(path)
+        if os.path.isfile(temp_path):
+            if verbose:
+                print("removing", temp_path)
+            os.unlink(temp_path)
 
 
 def download(path, url, probably_big, verbose):
@@ -99,14 +91,12 @@ def _download(path, url, probably_big, verbose, exception):
             exception=exception)
 
 
-def verify(path, sha_path, verbose):
+def verify(path, expected, verbose):
     """Check if the sha256 sum of the given path is valid"""
     if verbose:
         print("verifying", path)
     with open(path, "rb") as source:
         found = hashlib.sha256(source.read()).hexdigest()
-    with open(sha_path, "r") as sha256sum:
-        expected = sha256sum.readline().split()[0]
     verified = found == expected
     if not verified:
         print("invalid checksum:\n"
@@ -375,6 +365,7 @@ class Stage0Toolchain:
 class RustBuild(object):
     """Provide all the methods required to build Rust"""
     def __init__(self):
+        self.checksums_sha256 = {}
         self.stage0_compiler = None
         self.stage0_rustfmt = None
         self._download_url = ''
@@ -529,12 +520,21 @@ class RustBuild(object):
             os.makedirs(rustc_cache)
 
         if stage0:
-            url = "{}/dist/{}".format(self._download_url, key)
+            base = self._download_url
+            url = "dist/{}".format(key)
         else:
-            url = "https://ci-artifacts.rust-lang.org/rustc-builds/{}".format(self.rustc_commit)
+            base = "https://ci-artifacts.rust-lang.org"
+            url = "rustc-builds/{}".format(self.rustc_commit)
         tarball = os.path.join(rustc_cache, filename)
         if not os.path.exists(tarball):
-            get("{}/{}".format(url, filename), tarball, verbose=self.verbose, do_verify=stage0)
+            get(
+                base,
+                "{}/{}".format(url, filename),
+                tarball,
+                self.checksums_sha256,
+                verbose=self.verbose,
+                do_verify=stage0,
+            )
         unpack(tarball, tarball_suffix, self.bin_root(stage0), match=pattern, verbose=self.verbose)
 
     def _download_ci_llvm(self, llvm_sha, llvm_assertions):
@@ -544,7 +544,8 @@ class RustBuild(object):
         if not os.path.exists(rustc_cache):
             os.makedirs(rustc_cache)
 
-        url = "https://ci-artifacts.rust-lang.org/rustc-builds/{}".format(llvm_sha)
+        base = "https://ci-artifacts.rust-lang.org"
+        url = "rustc-builds/{}".format(llvm_sha)
         if llvm_assertions:
             url = url.replace('rustc-builds', 'rustc-builds-alt')
         # ci-artifacts are only stored as .xz, not .gz
@@ -556,7 +557,14 @@ class RustBuild(object):
         filename = "rust-dev-nightly-" + self.build + tarball_suffix
         tarball = os.path.join(rustc_cache, filename)
         if not os.path.exists(tarball):
-            get("{}/{}".format(url, filename), tarball, verbose=self.verbose, do_verify=False)
+            get(
+                base,
+                "{}/{}".format(url, filename),
+                tarball,
+                self.checksums_sha256,
+                verbose=self.verbose,
+                do_verify=False,
+            )
         unpack(tarball, tarball_suffix, self.llvm_root(),
                 match="rust-dev",
                 verbose=self.verbose)
@@ -1158,6 +1166,7 @@ def bootstrap(help_triggered):
 
     with open(os.path.join(build.rust_root, "src", "stage0.json")) as f:
         data = json.load(f)
+    build.checksums_sha256 = data["checksums_sha256"]
     build.stage0_compiler = Stage0Toolchain(data["compiler"])
     if data.get("rustfmt") is not None:
         build.stage0_rustfmt = Stage0Toolchain(data["rustfmt"])
diff --git a/src/bootstrap/bootstrap_test.py b/src/bootstrap/bootstrap_test.py
index c91fd60da2f..7bffc1c1520 100644
--- a/src/bootstrap/bootstrap_test.py
+++ b/src/bootstrap/bootstrap_test.py
@@ -18,14 +18,13 @@ class VerifyTestCase(unittest.TestCase):
     def setUp(self):
         self.container = tempfile.mkdtemp()
         self.src = os.path.join(self.container, "src.txt")
-        self.sums = os.path.join(self.container, "sums")
         self.bad_src = os.path.join(self.container, "bad.txt")
         content = "Hello world"
 
+        self.expected = hashlib.sha256(content.encode("utf-8")).hexdigest()
+
         with open(self.src, "w") as src:
             src.write(content)
-        with open(self.sums, "w") as sums:
-            sums.write(hashlib.sha256(content.encode("utf-8")).hexdigest())
         with open(self.bad_src, "w") as bad:
             bad.write("Hello!")
 
@@ -34,11 +33,11 @@ class VerifyTestCase(unittest.TestCase):
 
     def test_valid_file(self):
         """Check if the sha256 sum of the given file is valid"""
-        self.assertTrue(bootstrap.verify(self.src, self.sums, False))
+        self.assertTrue(bootstrap.verify(self.src, self.expected, False))
 
     def test_invalid_file(self):
         """Should verify that the file is invalid"""
-        self.assertFalse(bootstrap.verify(self.bad_src, self.sums, False))
+        self.assertFalse(bootstrap.verify(self.bad_src, self.expected, False))
 
 
 class ProgramOutOfDate(unittest.TestCase):
diff --git a/src/stage0.json b/src/stage0.json
index 3cd97243152..1160cd3ab4e 100644
--- a/src/stage0.json
+++ b/src/stage0.json
@@ -8,5 +8,339 @@
   "rustfmt": {
     "date": "2021-08-26",
     "version": "nightly"
+  },
+  "checksums_sha256": {
+    "dist/2021-08-22/cargo-beta-aarch64-apple-darwin.tar.gz": "1aae6206b6ee057a53c6863d1aa9246a913bd8cc87945221ffe25a0763198ec9",
+    "dist/2021-08-22/cargo-beta-aarch64-apple-darwin.tar.xz": "9bb4026714d46f99077c4ec2ac1f818a059252996077569339a72704a1044cc5",
+    "dist/2021-08-22/cargo-beta-aarch64-pc-windows-msvc.tar.gz": "127a066958fe2f67154ae5e5ffdf67e216cd9da5c8ca7f6f5818017ef647eb57",
+    "dist/2021-08-22/cargo-beta-aarch64-pc-windows-msvc.tar.xz": "f62459d78c012d129a38f9f05975f784ca59f613cb77f273ac1be992320968ca",
+    "dist/2021-08-22/cargo-beta-aarch64-unknown-linux-gnu.tar.gz": "eb0e5765d0d37129a1e70680cb701fc7968baf98a183a25fbe495d5e1818a67c",
+    "dist/2021-08-22/cargo-beta-aarch64-unknown-linux-gnu.tar.xz": "8168902da36e32c2b2946ec18d41c4877191e3b5ec95276d85a1453541be8adf",
+    "dist/2021-08-22/cargo-beta-aarch64-unknown-linux-musl.tar.gz": "e8a774fd383d0a7a3a1216ebd3a005fe01560002c8a28b89ce7f9a0ac522a07f",
+    "dist/2021-08-22/cargo-beta-aarch64-unknown-linux-musl.tar.xz": "da7e246ca883ace9f9006257dd52756395307613f2bc10d86bacfe9b24f861c8",
+    "dist/2021-08-22/cargo-beta-arm-unknown-linux-gnueabi.tar.gz": "bc20e1ffe92aeca2a01bab6b1e383dfd7cecde01780bb2369ef5e10ef6e88bc7",
+    "dist/2021-08-22/cargo-beta-arm-unknown-linux-gnueabi.tar.xz": "5020ad70b694f18fa19be09d86983a7f396b38d71a65cf061438870d9264de45",
+    "dist/2021-08-22/cargo-beta-arm-unknown-linux-gnueabihf.tar.gz": "53792dbfd932874bc7be8cf6683e5fa318afe9e59a3069f1c82279d9b66edcfd",
+    "dist/2021-08-22/cargo-beta-arm-unknown-linux-gnueabihf.tar.xz": "cb393c4f0c0b6ef9c921733267192c01935fec55944c770765e3dcc37d9c20a8",
+    "dist/2021-08-22/cargo-beta-armv7-unknown-linux-gnueabihf.tar.gz": "96f017458f94370758b2cfa30f787707f548aeb9ca2dd9a52a43b27c73040b82",
+    "dist/2021-08-22/cargo-beta-armv7-unknown-linux-gnueabihf.tar.xz": "aa0b966b0ae33dc01714f16b3e511ae1f60da0a1a0e4de32e09cbe7a5e6a67b3",
+    "dist/2021-08-22/cargo-beta-i686-pc-windows-gnu.tar.gz": "38f9b818c71bbf607cd0db8e73b539506f42c529fb8a5053860e844914e0ade3",
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+    "dist/2021-08-22/cargo-beta-i686-unknown-linux-gnu.tar.gz": "d5e71781a82b424b28b90fe08d2ac4d86b37acd476bc36c106222128202a9476",
+    "dist/2021-08-22/cargo-beta-i686-unknown-linux-gnu.tar.xz": "65f860c74140318eb5c034a04c85e3eabfb31dfa8d70791d701f15d979d50361",
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+    "dist/2021-08-22/cargo-beta-x86_64-unknown-linux-musl.tar.gz": "998df5339f738815ab7c38b32df00eef09ff0e415a85d2ae2ab1c0836a380906",
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+    "dist/2021-08-22/rust-std-beta-aarch64-fuchsia.tar.gz": "54ec6a313cc523fc568c4879cf36ab90bade8a1ae9c2ee89bafd57c2c9f3f754",
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+    "dist/2021-08-22/rust-std-beta-aarch64-unknown-linux-musl.tar.gz": "48dada900d144fc9a17ff273ab44d9c4c5fb0cfbaae986d6396aaa6c9c5c22d5",
+    "dist/2021-08-22/rust-std-beta-aarch64-unknown-linux-musl.tar.xz": "c93b5da1e22138da0a97be32b9498a3ede270253a22a9d9275f610e349438bfb",
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+    "dist/2021-08-26/rustfmt-nightly-x86_64-unknown-netbsd.tar.xz": "64b29ff6dabc46d124ccf08e8fe351a2d46ed527efe98de36d38c0ec59b226cc"
   }
 }
diff --git a/src/tools/bump-stage0/Cargo.toml b/src/tools/bump-stage0/Cargo.toml
index c94331e98e8..7d64e20a3d3 100644
--- a/src/tools/bump-stage0/Cargo.toml
+++ b/src/tools/bump-stage0/Cargo.toml
@@ -8,6 +8,7 @@ edition = "2018"
 [dependencies]
 anyhow = "1.0.34"
 curl = "0.4.38"
+indexmap = { version = "1.7.0", features = ["serde"] }
 serde = { version = "1.0.125", features = ["derive"] }
 serde_json = "1.0.59"
 toml = "0.5.7"
diff --git a/src/tools/bump-stage0/src/main.rs b/src/tools/bump-stage0/src/main.rs
index 2c673ecccda..96d3c873843 100644
--- a/src/tools/bump-stage0/src/main.rs
+++ b/src/tools/bump-stage0/src/main.rs
@@ -1,13 +1,17 @@
 use anyhow::Error;
 use curl::easy::Easy;
+use indexmap::IndexMap;
 use std::collections::HashMap;
 use std::convert::TryInto;
 
 const DIST_SERVER: &str = "https://static.rust-lang.org";
+const COMPILER_COMPONENTS: &[&str] = &["rustc", "rust-std", "cargo"];
+const RUSTFMT_COMPONENTS: &[&str] = &["rustfmt-preview"];
 
 struct Tool {
     channel: Channel,
     version: [u16; 3],
+    checksums: IndexMap<String, String>,
 }
 
 impl Tool {
@@ -28,10 +32,10 @@ impl Tool {
             .try_into()
             .map_err(|_| anyhow::anyhow!("failed to parse version"))?;
 
-        Ok(Self { channel, version })
+        Ok(Self { channel, version, checksums: IndexMap::new() })
     }
 
-    fn update_json(self) -> Result<(), Error> {
+    fn update_json(mut self) -> Result<(), Error> {
         std::fs::write(
             "src/stage0.json",
             format!(
@@ -42,8 +46,14 @@ impl Tool {
                     dist_server: DIST_SERVER.into(),
                     compiler: self.detect_compiler()?,
                     rustfmt: self.detect_rustfmt()?,
+                    checksums_sha256: {
+                        // Keys are sorted here instead of beforehand because values in this map
+                        // are added while filling the other struct fields just above this block.
+                        self.checksums.sort_keys();
+                        self.checksums
+                    }
                 })?
-            )
+            ),
         )?;
         Ok(())
     }
@@ -55,7 +65,7 @@ impl Tool {
     // On the master branch the compiler version is configured to `beta` whereas if you're looking
     // at the beta or stable channel you'll likely see `1.x.0` as the version, with the previous
     // release's version number.
-    fn detect_compiler(&self) -> Result<Stage0Toolchain, Error> {
+    fn detect_compiler(&mut self) -> Result<Stage0Toolchain, Error> {
         let channel = match self.channel {
             Channel::Stable | Channel::Beta => {
                 // The 1.XX manifest points to the latest point release of that minor release.
@@ -65,6 +75,7 @@ impl Tool {
         };
 
         let manifest = fetch_manifest(&channel)?;
+        self.collect_checksums(&manifest, COMPILER_COMPONENTS)?;
         Ok(Stage0Toolchain {
             date: manifest.date,
             version: if self.channel == Channel::Nightly {
@@ -84,14 +95,39 @@ impl Tool {
     /// We use a nightly rustfmt to format the source because it solves some bootstrapping issues
     /// with use of new syntax in this repo. For the beta/stable channels rustfmt is not provided,
     /// as we don't want to depend on rustfmt from nightly there.
-    fn detect_rustfmt(&self) -> Result<Option<Stage0Toolchain>, Error> {
+    fn detect_rustfmt(&mut self) -> Result<Option<Stage0Toolchain>, Error> {
         if self.channel != Channel::Nightly {
             return Ok(None);
         }
 
         let manifest = fetch_manifest("nightly")?;
+        self.collect_checksums(&manifest, RUSTFMT_COMPONENTS)?;
         Ok(Some(Stage0Toolchain { date: manifest.date, version: "nightly".into() }))
     }
+
+    fn collect_checksums(&mut self, manifest: &Manifest, components: &[&str]) -> Result<(), Error> {
+        let prefix = format!("{}/", DIST_SERVER);
+        for component in components {
+            let pkg = manifest
+                .pkg
+                .get(*component)
+                .ok_or_else(|| anyhow::anyhow!("missing component from manifest: {}", component))?;
+            for target in pkg.target.values() {
+                for pair in &[(&target.url, &target.hash), (&target.xz_url, &target.xz_hash)] {
+                    if let (Some(url), Some(sha256)) = pair {
+                        let url = url
+                            .strip_prefix(&prefix)
+                            .ok_or_else(|| {
+                                anyhow::anyhow!("url doesn't start with dist server base: {}", url)
+                            })?
+                            .to_string();
+                        self.checksums.insert(url, sha256.clone());
+                    }
+                }
+            }
+        }
+        Ok(())
+    }
 }
 
 fn main() -> Result<(), Error> {
@@ -137,6 +173,7 @@ struct Stage0 {
     dist_server: String,
     compiler: Stage0Toolchain,
     rustfmt: Option<Stage0Toolchain>,
+    checksums_sha256: IndexMap<String, String>,
 }
 
 #[derive(Debug, serde::Serialize)]