patch v4l2-sys-mit, nettle-sys, fix keyfork-zbar-sys

Cargo.lock

@@ -367,7 +367,6 @@ dependencies = [
  "clang-sys",
  "lazy_static",
  "lazycell",
- "log",
  "peeking_take_while",
  "prettyplease",
  "proc-macro2",
@@ -376,7 +375,6 @@ dependencies = [
  "rustc-hash",
  "shlex",
  "syn 2.0.48",
- "which",
 ]
 
 [[package]]
@@ -411,15 +409,12 @@ dependencies = [
  "itertools",
  "lazy_static",
  "lazycell",
- "log",
- "prettyplease",
  "proc-macro2",
  "quote",
  "regex",
  "rustc-hash",
  "shlex",
  "syn 2.0.48",
- "which",
 ]
 
 [[package]]
@@ -1509,15 +1504,6 @@ dependencies = [
  "digest",
 ]
 
-[[package]]
-name = "home"
-version = "0.5.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3d1354bf6b7235cb4a0576c2619fd4ed18183f689b12b006a0ee7329eeff9a5"
-dependencies = [
- "windows-sys 0.52.0",
-]
-
 [[package]]
 name = "iana-time-zone"
 version = "0.1.59"
@@ -1694,9 +1680,8 @@ dependencies = [
 name = "keyfork"
 version = "0.1.0"
 dependencies = [
- "bindgen 0.69.4",
+ "bindgen 0.68.1",
  "card-backend-pcsc",
- "clang-sys",
  "clap",
  "clap_complete",
  "keyfork-bin",
@@ -1888,6 +1873,7 @@ dependencies = [
 name = "keyfork-zbar"
 version = "0.1.0"
 dependencies = [
+ "bindgen 0.69.4",
  "image",
  "keyfork-zbar-sys",
  "thiserror",
@@ -2154,10 +2140,8 @@ dependencies = [
 [[package]]
 name = "nettle-sys"
 version = "2.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b495053a10a19a80e3a26bf1212e92e29350797b5f5bdc58268c3f3f818e66ec"
 dependencies = [
- "bindgen 0.68.1",
+ "bindgen 0.65.1",
  "cc",
  "libc",
  "pkg-config",
@@ -3525,10 +3509,8 @@ dependencies = [
 [[package]]
 name = "v4l2-sys-mit"
 version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6779878362b9bacadc7893eac76abe69612e8837ef746573c4a5239daf11990b"
 dependencies = [
- "bindgen 0.65.1",
+ "bindgen 0.68.1",
 ]
 
 [[package]]
@@ -3643,18 +3625,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "which"
-version = "4.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87ba24419a2078cd2b0f2ede2691b6c66d8e47836da3b6db8265ebad47afbfc7"
-dependencies = [
- "either",
- "home",
- "once_cell",
- "rustix 0.38.31",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"

Cargo.toml

@@ -29,3 +29,6 @@ members = [
 opt-level = 3
 debug = true
 
+[patch.crates-io]
+nettle-sys = { path = "vendor/nettle-sys-2.3.0" }
+v4l2-sys-mit = { path = "vendor/v4l2-sys-mit-0.3.0" }

crates/keyfork/Cargo.toml

@@ -9,9 +9,11 @@ default = [
 	"completion",
 	"qrcode-decode-backend-rqrr",
  	"sequoia-crypto-backend-nettle",
+	"link-static",
 ]
 
-static = ["clang-sys/static"]
+link-static = ["bindgen/static"]
+link-runtime = ["bindgen/runtime"]
 
 completion = ["dep:clap_complete"]
 
@@ -46,5 +48,6 @@ openpgp-card-sequoia = { version = "0.2.0", default-features = false }
 openpgp-card = "0.4.1"
 clap_complete = { version = "4.4.6", optional = true }
 sequoia-openpgp = { version = "1.17.0", default-features = false, features = ["compression"] }
-clang-sys = { version = "1.7.0", optional = true }
-bindgen = { version = "0.69.4", optional = true, features = ["static"] }
+
+# necessary for enabling downstream feature flags
+bindgen = { version = "0.68.1", default-features = false }

crates/qrcode/keyfork-zbar-sys/Cargo.toml

@@ -10,5 +10,5 @@ license = "MIT"
 [dependencies]
 
 [build-dependencies]
-bindgen = { version = "0.68", default-features = false, features = ["runtime"] }
+bindgen = { version = "0.68", default-features = false }
 pkg-config = "0.3"

crates/qrcode/keyfork-zbar/Cargo.toml

@@ -8,13 +8,14 @@ license = "MIT"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
-default = ["image"]
-image = ["dep:image"]
+link-runtime = ["bindgen/runtime"]
+link-static = ["bindgen/static"]
 
 [dependencies]
 keyfork-zbar-sys = { version = "0.1.0", path = "../keyfork-zbar-sys", registry = "distrust" }
-image = { version = "0.24.7", default-features = false, optional = true }
+image = { version = "0.24.7", default-features = false }
 thiserror = "1.0.56"
+bindgen = { version = "0.69.4", default-features = false, optional = true }
 
 [dev-dependencies]
 v4l = "0.14.0"

crates/qrcode/keyfork-zbar/src/image.rs

@@ -55,7 +55,6 @@ impl Image {
     }
 }
 
-#[cfg(feature = "image")]
 mod impls {
     use super::*;
     use image::{DynamicImage, GenericImageView};

vendor/nettle-sys-2.3.0/.cargo_vcs_info.json

@@ -0,0 +1,6 @@
+{
+  "git": {
+    "sha1": "30dcffb68a0fbaf62321793ee8e7895992c44432"
+  },
+  "path_in_vcs": ""
+}

vendor/nettle-sys-2.3.0/.gitignore

@@ -0,0 +1,5 @@
+/target/
+**/*.rs.bk
+Cargo.lock
+**/*.swp
+**/*.swo

vendor/nettle-sys-2.3.0/.gitlab-ci.yml

@@ -0,0 +1,123 @@
+# These stanzas do some common management tasks before and after the
+# job-specific before_script and after_script stanzas are run.
+# before_script_start configures any default global state.  The
+# job-specific before_script can override this state, if required.
+# before_script_end prints out information about the environment to
+# improve debugging; it does not modify the environment.
+# after_script_end does some common management tasks after the
+# job-specific after_script is run.  It prints information about the
+# environment, and does some clean up.
+#
+# Add this to your stanza as follows:
+#
+#   before_script:
+#     - *before_script_start
+#     - *** YOUR CODE HERE ***
+#     - *before_script_end
+#   after_script:
+#     - *** YOUR CODE HERE ***
+#     - *after_script_end
+
+.before_script_start: &before_script_start
+  - 'if test "x${RUSTFLAGS+SET}" = xSET; then echo "\$RUSTFLAGS is set ($RUSTFLAGS)"; exit 1; fi'
+
+.before_script_end: &before_script_end
+  - 'if test "x${RUSTFLAGS+SET}" = xSET; then echo "WARNING: before_script set \$RUSTFLAGS ($RUSTFLAGS)"; fi'
+  - rustc --version --verbose
+  - cargo --version
+  - clang -v
+  - if [ -d $CARGO_TARGET_DIR ]; then find $CARGO_TARGET_DIR | wc --lines; du -sh $CARGO_TARGET_DIR; fi
+  - if [ -d $CARGO_HOME ]; then find $CARGO_HOME | wc --lines; du -sh $CARGO_HOME; fi
+
+.after_script_end: &after_script_end
+  - if [ -d $CARGO_TARGET_DIR ]; then find $CARGO_TARGET_DIR -type f -atime +7 -delete; fi
+  - if [ -d $CARGO_TARGET_DIR ]; then du -sh $CARGO_TARGET_DIR; fi
+  - if [ -d $CARGO_HOME ]; then du -sh $CARGO_HOME; fi
+
+before_script:
+  - *before_script_start
+  - *before_script_end
+
+after_script:
+  - *after_script_end
+
+image: 192.168.122.1:5000/sequoia-pgp/build-docker-image/trixie:latest
+
+test:
+  script:
+    - cargo test --all
+
+# This tests with Nettle 3.8.1.
+test-bookworm:
+  image: rust:slim-bookworm
+  before_script:
+    - *before_script_start
+    - apt update -y -qq
+    - apt install -y -qq --no-install-recommends clang llvm pkg-config nettle-dev
+    - *before_script_end
+  script:
+    - cargo test --all
+
+
+# This tests with Nettle 3.7.3.
+test-bullseye:
+  image: rust:slim-bullseye
+  before_script:
+    - *before_script_start
+    - apt update -y -qq
+    - apt install -y -qq --no-install-recommends clang llvm pkg-config nettle-dev
+    - *before_script_end
+  script:
+    - cargo test --all
+
+# This tests with Nettle 3.4.1.
+test-buster:
+  image: rust:slim-buster
+  before_script:
+    - *before_script_start
+    - apt update -y -qq
+    - apt install -y -qq --no-install-recommends clang llvm pkg-config nettle-dev
+    - *before_script_end
+  script:
+    - cargo test --all
+
+# Test on Windows with the GNU toolchain.
+test-windows-gnu:
+  tags:
+    - win
+    - win2019
+  image: 192.168.122.1:5000/sequoia-pgp/build-docker-image/windows-gnu
+  only:
+    variables:
+      # Forks of this project most likely use gitlab's shared windows runners, which
+      # do not use the docker executor, so disable the windows jobs for forks.
+      - $CI_PROJECT_NAMESPACE == "sequoia-pgp"
+  script:
+    - rustup override set stable
+    - cargo test --all
+  # Windows uses Powershell, disable our scriptlets.
+  before_script: []
+  after_script: []
+
+pages:
+  stage: deploy
+  script:
+    - cargo doc
+    - mv target/doc public
+    - cp docs/index.html public/
+  artifacts:
+    paths:
+      - public
+  only:
+    - main
+
+cache:
+  paths:
+    - cargo/
+
+variables:
+  DEBIAN_FRONTEND: noninteractive
+  CARGO_HOME: $CI_PROJECT_DIR/cargo
+  CARGO_TARGET_DIR: $CI_PROJECT_DIR/target
+  CARGO_FLAGS: --color always
+  CARGO_INCREMENTAL: 0

vendor/nettle-sys-2.3.0/Cargo.toml

@@ -0,0 +1,58 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+name = "nettle-sys"
+version = "2.3.0"
+authors = [
+    "Justus Winter <justus@sequoia-pgp.org>",
+    "Kai Michaelis <kai@sequoia-pgp.org>",
+]
+links = "nettle"
+description = "Low-level Rust bindings for the Nettle cryptographic library"
+documentation = "https://docs.rs/nettle-sys/"
+readme = "README.md"
+keywords = [
+    "nettle",
+    "cryptography",
+]
+categories = [
+    "external-ffi-bindings",
+    "cryptography",
+]
+license = "LGPL-3.0 OR GPL-2.0 OR GPL-3.0"
+repository = "https://gitlab.com/sequoia-pgp/nettle-sys"
+
+[package.metadata.docs.rs]
+dependencies = [
+    "pkg-config",
+    "nettle-dev",
+]
+
+[dependencies.libc]
+version = "0.2"
+
+[build-dependencies.bindgen]
+version = ">= 0.58.0, < 0.69.0"
+default-features = false
+
+[build-dependencies.cc]
+version = "1"
+
+[build-dependencies.pkg-config]
+version = "0.3"
+
+[build-dependencies.tempfile]
+version = "3"
+
+[target."cfg(target_env = \"msvc\")".build-dependencies.vcpkg]
+version = "0.2.9"

vendor/nettle-sys-2.3.0/Cargo.toml.orig

@@ -0,0 +1,31 @@
+[package]
+name = "nettle-sys"
+version = "2.3.0"
+authors = [
+    "Justus Winter <justus@sequoia-pgp.org>",
+    "Kai Michaelis <kai@sequoia-pgp.org>",
+]
+edition = "2018"
+description = "Low-level Rust bindings for the Nettle cryptographic library"
+repository = "https://gitlab.com/sequoia-pgp/nettle-sys"
+keywords = ["nettle", "cryptography"]
+categories = ["external-ffi-bindings", "cryptography"]
+license = "LGPL-3.0 OR GPL-2.0 OR GPL-3.0"
+readme = "README.md"
+documentation = "https://docs.rs/nettle-sys/"
+links = "nettle"
+
+[dependencies]
+libc = "0.2"
+
+[build-dependencies]
+bindgen = { version = ">= 0.58.0, < 0.69.0", default-features = false, features = ["runtime"] }
+cc = "1"
+pkg-config = "0.3"
+tempfile = "3"
+
+[target.'cfg(target_env = "msvc")'.build-dependencies]
+vcpkg = "0.2.9"
+
+[package.metadata.docs.rs]
+dependencies = [ "pkg-config", "nettle-dev" ]

vendor/nettle-sys-2.3.0/Cross.toml

@@ -0,0 +1,2 @@
+[target.arm-linux-androideabi]
+image = "nettle-sys/arm-linux-androideabi:1"

vendor/nettle-sys-2.3.0/LICENSE-GPL2

@@ -0,0 +1,340 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
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+

vendor/nettle-sys-2.3.0/LICENSE-GPL3

@@ -0,0 +1,675 @@
+                    GNU GENERAL PUBLIC LICENSE
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+
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+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
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+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
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+may consider it more useful to permit linking proprietary applications with
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+<https://www.gnu.org/philosophy/why-not-lgpl.html>.
+

vendor/nettle-sys-2.3.0/LICENSE-LGPL3

@@ -0,0 +1,166 @@
+		   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions. 
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
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+

vendor/nettle-sys-2.3.0/README.md

@@ -0,0 +1,126 @@
+# nettle-sys
+
+Low-level Rust bindings for the [Nettle cryptographic library](https://git.lysator.liu.se/nettle/nettle).
+
+The documentation can be found [here](https://sequoia-pgp.gitlab.io/nettle-sys).
+
+## Building
+
+To build the Nettle bindings, you need a few libraries and support
+packages.  Notably, you need the Nettle cryptographic library version
+3.4.1 or up.  Some cryptographic algorithms are only available if
+build against newer versions of Nettle, see [optional
+features](#optional-features).
+
+Please see below for OS-specific commands to install the needed
+libraries.
+
+### Debian
+
+```shell
+$ sudo apt install clang llvm pkg-config nettle-dev
+```
+
+### Arch Linux
+
+```shell
+$ sudo pacman -S clang pkg-config nettle --needed
+```
+
+### Fedora
+
+```shell
+$ sudo dnf install clang pkg-config nettle-devel
+```
+
+### macOS (Mojave), using MacPorts
+
+```shell
+$ sudo port install nettle pkgconfig
+```
+
+### Windows
+
+#### MSYS2
+
+You can install the needed libraries with the following command:
+
+```shell
+$ pacman -S mingw-w64-x86_64-{clang,pkg-config,nettle} libnettle-devel
+```
+
+## Optional features
+
+Some cryptographic algorithms are only available if build against
+newer versions of Nettle.  Support for each feature is detected at
+build time.
+
+In case the automatic detection does not work for some reason, the
+optional algorithms can be enabled or disabled by setting the given
+environment variable.
+
+Setting such a variable to `1`, `y`, `yes`, `enable`, or `true`
+enables a feature.  Any other value disables it.
+
+| Algorithm    | Required Nettle version | Environment variable |
+|--------------|-------------------------|----------------------|
+| cv448, ed448 | >= 3.6                  | NETTLE_HAVE_CV448    |
+| OCB          | >= 3.9                  | NETTLE_HAVE_OCB      |
+
+## Cross compilation
+
+`nettle-sys` can be cross compiled using [`cross`](https://github.com/rust-embedded/cross) and a custom Docker container. First, build the container and install `cross`:
+
+```bash
+cargo install cross
+docker -t nettle-sys/<toolchain>:1 docker/<toolchain>
+```
+
+Then, you can cross compile the project:
+
+```bash
+cross --target <toolchain> -v
+```
+
+The build artifacts will be placed in `target/debug/<toolchain>`.
+
+## Static linking
+
+By default, `nettle-sys` is dynamically linked to its dependencies.
+
+By defining the `NETTLE_STATIC` environment variable during the build, it can
+also be statically link to its dependencies:
+
+```bash
+env NETTLE_STATIC=yes cargo build
+```
+
+This is particularly useful to produce standalone binaries that can be easily
+distributed.
+
+## Pregenerate `bindings.rs`
+
+By default, `nettle-sys` invokes `bindgen` to generate bindings for
+Nettle.  In some build environments, this might not work due to
+`bindgen` depending on `libllvm`.  In this case, the `bindings.rs` may
+be pregenerated, and used by setting:
+
+```bash
+env NETTLE_PREGENERATED_BINDINGS=/path/to/bindings.rs cargo build
+```
+
+Note: `bindings.rs` is specific to target architecture, operating
+system, and Nettle version.
+
+# License
+
+This project is licensed under either of
+
+ * GNU General Public License, Version 2.0, ([LICENSE-GPL2](LICENSE-GPL2) or
+   https://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
+ * GNU General Public License, Version 3.0, ([LICENSE-GPL3](LICENSE-GPL3) or
+   https://www.gnu.org/licenses/gpl.html)
+ * GNU Lesser General Public License, Version 3.0, ([LICENSE-LGPL3](LICENSE-LGPL3) or
+   https://www.gnu.org/licenses/lgpl.html)
+
+at your option.

vendor/nettle-sys-2.3.0/bindgen-wrapper.h

@@ -0,0 +1,58 @@
+#include <nettle/aes.h>
+#include <nettle/arcfour.h>
+#include <nettle/arctwo.h>
+#include <nettle/asn1.h>
+#include <nettle/base16.h>
+#include <nettle/base64.h>
+#include <nettle/bignum.h>
+#include <nettle/blowfish.h>
+#include <nettle/buffer.h>
+#include <nettle/camellia.h>
+#include <nettle/cast128.h>
+#include <nettle/cbc.h>
+#include <nettle/ccm.h>
+#include <nettle/cfb.h>
+#include <nettle/chacha-poly1305.h>
+#include <nettle/chacha.h>
+#include <nettle/ctr.h>
+#include <nettle/curve25519.h>
+#include <nettle/des.h>
+#include <nettle/dsa.h>
+#include <nettle/eax.h>
+#include <nettle/ecc-curve.h>
+#include <nettle/ecc.h>
+#include <nettle/ecdsa.h>
+#include <nettle/eddsa.h>
+#include <nettle/gcm.h>
+#include <nettle/gosthash94.h>
+#include <nettle/hkdf.h>
+#include <nettle/hmac.h>
+#include <nettle/knuth-lfib.h>
+#include <nettle/macros.h>
+#include <nettle/md2.h>
+#include <nettle/md4.h>
+#include <nettle/md5.h>
+#include <nettle/memops.h>
+#include <nettle/memxor.h>
+#include <nettle/nettle-meta.h>
+#include <nettle/nettle-types.h>
+#include <nettle/pbkdf2.h>
+#include <nettle/pgp.h>
+#include <nettle/pkcs1.h>
+#include <nettle/poly1305.h>
+#include <nettle/pss-mgf1.h>
+#include <nettle/pss.h>
+#include <nettle/realloc.h>
+#include <nettle/ripemd160.h>
+#include <nettle/rsa.h>
+#include <nettle/salsa20.h>
+#include <nettle/serpent.h>
+#include <nettle/sexp.h>
+#include <nettle/sha.h>
+#include <nettle/sha1.h>
+#include <nettle/sha2.h>
+#include <nettle/sha3.h>
+#include <nettle/twofish.h>
+#include <nettle/umac.h>
+#include <nettle/version.h>
+#include <nettle/yarrow.h>

vendor/nettle-sys-2.3.0/build.rs

@@ -0,0 +1,380 @@
+use std::fs;
+use std::io::{self, Write};
+use std::path::{Path, PathBuf};
+
+/// Like std::env::var, but informs cargo.
+///
+/// Always use this one instead of the function in the standard
+/// library!
+///
+/// If we look at an environment variable, we need to tell cargo that
+/// we're doing so.  This makes sure that cargo will consider the
+/// build stale if the value of the environment variable changes.
+fn env_var<K>(key: K)-> std::result::Result<String, std::env::VarError>
+where
+    K: AsRef<std::ffi::OsStr>,
+{
+    let key = key.as_ref();
+    println!("cargo:rerun-if-env-changed={}", key.to_string_lossy());
+    std::env::var(key)
+}
+
+type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
+
+/// Build-time configuration.
+struct Config {
+    /// Paths containing header files needed for compilation.
+    include_paths: Vec<PathBuf>,
+
+    /// Cv448/Ed448 support in Nettle.
+    have_cv448: bool,
+
+    /// OCB support in Nettle.
+    have_ocb: bool,
+}
+
+/// Returns true if the given Nettle version matches or exceeds our
+/// required version.
+///
+/// In general, it is better to use check_cc than to rely on the
+/// Nettle version number to gate features.
+#[allow(dead_code)]
+fn is_version_at_least<V: AsRef<str>>(nettle_version: V, need: &[u8]) -> bool {
+    for (i, (n, component)) in need.iter()
+        .zip(nettle_version.as_ref().split('.'))
+        .enumerate()
+    {
+        if let Ok(c) = component.parse::<u8>() {
+            if c < *n {
+                return false;
+            } else if c > *n {
+                return true;
+            } else {
+                // Compare the next component.
+            }
+        } else {
+            panic!("Failed to parse the {}th component of the Nettle version \
+                    {:?}: {:?}", i + 1, nettle_version.as_ref(), component);
+        }
+    }
+
+    true
+}
+
+/// Returns whether or not the feature detection should be overridden,
+/// and if so, whether the feature should be enabled.
+fn check_override(feature: &str) -> Option<bool> {
+    env_var(&format!("NETTLE_HAVE_{}", feature))
+        .ok()
+        .map(|v| match v.to_lowercase().as_str() {
+            "1" | "y" | "yes" | "enable" | "true" => true,
+            _ => false,
+        })
+}
+
+/// Tries to compile a test program to probe for Nettle features.
+fn check_cc(includes: &[PathBuf], header: &str, symbol: &str) -> bool {
+    let t = || -> Result<bool> {
+        let wd = tempfile::tempdir()?;
+        let testpath = wd.path().join("test.c");
+        let mut testfile = fs::File::create(&testpath)?;
+        write!(testfile, "#include <nettle/{}>
+int
+main()
+{{
+  (void) {};
+}}
+", header, symbol)?;
+
+        let tool = cc::Build::new()
+            .warnings(false)
+            .includes(includes)
+            .try_get_compiler()?;
+
+        let output = tool.to_command()
+            .current_dir(&wd)
+            .arg(&testpath)
+            .output()?;
+        Ok(output.status.success())
+    };
+    t().unwrap_or(false)
+}
+
+/// Checks whether Nettle supports Curve 448.
+fn check_cv448(includes: &[PathBuf]) -> bool {
+    check_override("CV448")
+        .unwrap_or_else(|| check_cc(includes, "eddsa.h",
+                                    "nettle_ed448_shake256_sign"))
+}
+
+/// Checks whether Nettle supports OCB mode.
+fn check_ocb(includes: &[PathBuf]) -> bool {
+    check_override("OCB")
+        .unwrap_or_else(|| check_cc(includes, "ocb.h",
+                                    "nettle_ocb_encrypt"))
+}
+
+#[cfg(target_env = "msvc")]
+fn try_vcpkg() -> Result<Config> {
+    let lib = vcpkg::Config::new()
+        .emit_includes(true)
+        .find_package("nettle")?;
+
+    Ok(Config {
+        have_cv448: check_cv448(&lib.include_paths),
+        have_ocb: check_ocb(&lib.include_paths),
+        include_paths: lib.include_paths,
+    })
+}
+
+#[cfg(not(target_env = "msvc"))]
+fn try_vcpkg() -> Result<Config> { Err("not applicable")?; unreachable!() }
+
+fn try_pkg_config() -> Result<Config> {
+    let mut nettle= Library::from(pkg_config::probe_library("nettle")?)
+        .merge(pkg_config::probe_library("hogweed")?.into());
+
+    // GMP only got pkg-config support in release 6.2 (2020-01-18). So we'll try to use it if
+    // possible, but fall back to just looking for it in the default include and lib paths.
+    if let Ok(gmp) = pkg_config::probe_library("gmp").map(Into::into) {
+        nettle = nettle.merge(gmp);
+    } else {
+        let mode = match env_var("GMP_STATIC").ok() {
+            Some(_) => "static",
+            None => "dylib",
+        };
+
+        println!("cargo:rustc-link-lib={}=gmp", mode);
+    }
+
+    Ok(Config {
+        have_cv448: check_cv448(&nettle.include_paths),
+        have_ocb: check_ocb(&nettle.include_paths),
+        include_paths: nettle.include_paths,
+    })
+}
+
+const NETTLE_PREGENERATED_BINDINGS: &str = "NETTLE_PREGENERATED_BINDINGS";
+
+fn real_main() -> Result<()> {
+    let config = try_vcpkg().or_else(|_| try_pkg_config())?;
+
+    // There is a bug (or obscure feature) in pkg-config-rs that
+    // doesn't let you statically link against libraries installed in
+    // /usr: https://github.com/rust-lang/pkg-config-rs/issues/102
+    //
+    // Work around that by emitting the directives necessary for cargo
+    // to statically link against Nettle, Hogweed, and GMP.
+    if env_var("NETTLE_STATIC").is_ok() {
+        println!("cargo:rustc-link-lib=static=nettle");
+        println!("cargo:rustc-link-lib=static=hogweed");
+        println!("cargo:rustc-link-lib=static=gmp");
+    }
+
+    let out_path = Path::new(&env_var("OUT_DIR").unwrap()).join("bindings.rs");
+
+    // Check if we have a bundled bindings.rs.
+    if let Ok(bundled) = env_var(NETTLE_PREGENERATED_BINDINGS)
+    {
+        let p = Path::new(&bundled);
+        if p.exists() {
+            fs::copy(&p, &out_path)?;
+            println!("cargo:rerun-if-changed={:?}", p);
+
+            // We're done.
+            return Ok(());
+        }
+    }
+
+    let mut builder = bindgen::Builder::default()
+        // Includes all nettle headers except mini-gmp.h
+        .header("bindgen-wrapper.h")
+        // Workaround for https://github.com/rust-lang-nursery/rust-bindgen/issues/550
+        .blocklist_type("max_align_t")
+        .blocklist_function("strtold")
+        .blocklist_function("qecvt")
+        .blocklist_function("qfcvt")
+        .blocklist_function("qgcvt")
+        .blocklist_function("qecvt_r")
+        .blocklist_function("qfcvt_r")
+        .size_t_is_usize(true);
+
+    if config.have_cv448 {
+        builder = builder.header_contents("cv448-wrapper.h", "#include <nettle/curve448.h>");
+    }
+
+    if config.have_ocb {
+        builder = builder.header_contents("ocb-wrapper.h", "#include <nettle/ocb.h>");
+    }
+
+    for p in config.include_paths {
+        builder = builder.clang_arg(format!("-I{}", p.display()));
+    }
+
+    let bindings = builder.generate().unwrap();
+    bindings.write_to_file(&out_path)?;
+
+    let mut s = fs::OpenOptions::new().append(true).open(out_path)?;
+    writeln!(s, "\
+/// Compile-time configuration.
+pub mod config {{
+    /// Cv448/Ed448 support in Nettle.
+    pub const HAVE_CV448: bool = {};
+
+    /// OCB support in Nettle.
+    pub const HAVE_OCB: bool = {};
+}}
+",
+             config.have_cv448,
+             config.have_ocb,
+    )?;
+
+    if ! config.have_cv448 {
+        let mut stubs = fs::File::open("cv448-stubs.rs")?;
+        io::copy(&mut stubs, &mut s)?;
+    }
+
+    if ! config.have_ocb {
+        let mut stubs = fs::File::open("ocb-stubs.rs")?;
+        io::copy(&mut stubs, &mut s)?;
+    }
+
+    Ok(())
+}
+
+fn main() -> Result<()> {
+    match real_main() {
+        Ok(()) => Ok(()),
+        Err(e) => {
+            eprintln!("Building nettle-sys failed.");
+            eprintln!("Because: {}", e);
+            eprintln!();
+            print_hints();
+            Err("Building nettle-sys failed.")?;
+            unreachable!()
+        }
+    }
+}
+
+fn print_hints() {
+    eprintln!("Please make sure the necessary build dependencies are \
+               installed.\n");
+
+    if cfg!(target_os = "windows") {
+        eprintln!("If you are using MSYS2, try:
+
+    $ pacman -S mingw-w64-x86_64-{{clang,pkg-config,nettle}} libnettle-devel
+");
+    } else if cfg!(target_os = "macos") {
+        eprintln!("If you are using MacPorts, try:
+
+    $ sudo port install nettle pkgconfig
+");
+    } else if cfg!(target_os = "linux") {
+        eprintln!("If you are using Debian (or a derivative), try:
+
+    $ sudo apt install clang llvm pkg-config nettle-dev
+");
+
+        eprintln!("If you are using Arch (or a derivative), try:
+
+    $ sudo pacman -S clang pkg-config nettle --needed
+");
+
+        eprintln!("If you are using Fedora (or a derivative), try:
+
+    $ sudo dnf install clang pkg-config nettle-devel
+");
+    }
+
+    eprintln!("See https://gitlab.com/sequoia-pgp/nettle-sys#building \
+               for more information.\n");
+}
+
+/// Writes a log message to /tmp/l.
+///
+/// I found it hard to log messages from the build script.  Hence this
+/// function.
+#[allow(dead_code)]
+fn log<S: AsRef<str>>(m: S) {
+    writeln!(&mut fs::OpenOptions::new().append(true).open("/tmp/l").unwrap(),
+             "{}", m.as_ref()).unwrap();
+}
+
+/// Somewhat like pkg_config::Library, but only with the parts we use.
+#[derive(Default)]
+pub struct Library {
+    pub libs: Vec<String>,
+    pub link_paths: Vec<PathBuf>,
+    pub frameworks: Vec<String>,
+    pub framework_paths: Vec<PathBuf>,
+    pub include_paths: Vec<PathBuf>,
+}
+
+impl Library {
+    /// Merges two libraries into one.
+    fn merge(mut self, mut other: Self) -> Self {
+        self.libs.append(&mut other.libs);
+        self.libs.sort();
+        self.libs.dedup();
+
+        self.link_paths.append(&mut other.link_paths);
+        self.link_paths.sort();
+        self.link_paths.dedup();
+
+        self.frameworks.append(&mut other.frameworks);
+        self.frameworks.sort();
+        self.frameworks.dedup();
+
+        self.framework_paths.append(&mut other.framework_paths);
+        self.framework_paths.sort();
+        self.framework_paths.dedup();
+
+        self.include_paths.append(&mut other.include_paths);
+        self.include_paths.sort();
+        self.include_paths.dedup();
+
+        self
+    }
+
+    /// Emits directives to make cargo link to the library.
+    ///
+    /// Note: If we are using pkg_config, then the necessary
+    /// directives are emitted by that crate already.  Emitting these
+    /// ourselves may be useful in the future if we add other ways to
+    /// configure how to build against Nettle.
+    #[allow(dead_code)]
+    fn print_library(&self, mode: &str) {
+	for p in &self.include_paths {
+	    println!("cargo:include={}", p.display());
+	}
+
+	for p in &self.frameworks {
+	    println!("cargo:rustc-link-lib=framework={}", p);
+	}
+
+	for p in &self.framework_paths {
+	    println!("cargo:rustc-link-search=framework={}", p.display());
+	}
+
+        for p in &self.libs {
+            println!("cargo:rustc-link-lib={}={}", mode, p);
+        }
+
+        for p in &self.link_paths {
+            println!("cargo:rustc-link-search=native={}", p.display());
+        }
+    }
+}
+
+impl From<pkg_config::Library> for Library {
+    fn from(l: pkg_config::Library) -> Library {
+        Library {
+            libs: l.libs,
+            link_paths: l.link_paths,
+            frameworks: l.frameworks,
+            framework_paths: l.framework_paths,
+            include_paths: l.include_paths,
+        }
+    }
+}

vendor/nettle-sys-2.3.0/cv448-stubs.rs

@@ -0,0 +1,46 @@
+// Stubs used when Nettle doesn't support Curve 448.
+
+pub const CURVE448_SIZE: u32 = 56;
+pub const ED448_KEY_SIZE: u32 = 57;
+pub const ED448_SIGNATURE_SIZE: u32 = 114;
+
+pub unsafe fn nettle_curve448_mul(
+    _q: *mut u8,
+    _n: *const u8,
+    _p: *const u8
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}
+
+pub unsafe fn nettle_curve448_mul_g(
+    _q: *mut u8,
+    _n: *const u8
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}
+
+pub unsafe fn nettle_ed448_shake256_public_key(
+    _pub_: *mut u8,
+    _priv_: *const u8
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}
+
+pub unsafe fn nettle_ed448_shake256_sign(
+    _pub_: *const u8,
+    _priv_: *const u8,
+    _length: usize,
+    _msg: *const u8,
+    _signature: *mut u8
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}
+
+pub unsafe fn nettle_ed448_shake256_verify(
+    _pub_: *const u8,
+    _length: usize,
+    _msg: *const u8,
+    _signature: *const u8
+) -> libc::c_int  {
+    unimplemented!("This version of Nettle does not support the operation");
+}

vendor/nettle-sys-2.3.0/docker/arm-linux-androidabi/Dockerfile

@@ -0,0 +1,52 @@
+# Source docker file. Needs to match up with HOST_ARCH
+FROM japaric/arm-linux-androideabi:v0.1.14
+
+# Target architecture. See https://github.com/rust-embedded/cross#supported-targets
+# for a list of all supported targets.
+ENV HOST_ARCH=arm-linux-androideabi
+
+# Version of the nettle dependencies to build.
+ENV GMP_VERSION=6.1.2 \
+    NETTLE_VERSION=3.4.1
+
+# Additional cross compiler config
+# Android needs the following:
+ENV CFLAGS="-fPIE -fPIC" \
+    LDFLAGS="-pie" \
+    PATH="/tmp/android-ndk/bin:${PATH}" \
+    PKG_CONFIG_ALLOW_CROSS=1 \
+    PKG_CONFIG_PATH=/tmp/prefix/lib/pkgconfig
+
+# Install deps
+RUN DEBIAN_FRONTEND=noninteractive \
+    apt update -yy && \
+    apt install -yy m4 wget libclang1
+
+# Cross compile GMP
+RUN cd /tmp && \
+    wget https://gmplib.org/download/gmp/gmp-${GMP_VERSION}.tar.bz2 && \
+    tar xvf gmp-${GMP_VERSION}.tar.bz2 && \
+    cd gmp-${GMP_VERSION} && \
+    AR="${HOST_ARCH}-ar" \
+    AS="${HOST_ARCH}-clang" \
+    CC="${HOST_ARCH}-clang" \
+    CXX="${HOST_ARCH}-clang++" \
+    LD="${HOST_ARCH}-ld" \
+    STRIP="${HOST_ARCH}-strip" ./configure --host=${HOST_ARCH} --prefix=/tmp/prefix && \
+    make && make install
+
+# Cross compile Nettle
+RUN cd /tmp && \
+    wget https://ftp.gnu.org/gnu/nettle/nettle-${NETTLE_VERSION}.tar.gz && \
+    tar xvf nettle-${NETTLE_VERSION}.tar.gz && \
+    cd nettle-${NETTLE_VERSION} && \
+    AR="${HOST_ARCH}-ar" \
+    AS="${HOST_ARCH}-clang" \
+    CC="${HOST_ARCH}-clang" \
+    CXX="${HOST_ARCH}-clang++" \
+    LD="${HOST_ARCH}-ld" \
+    STRIP="${HOST_ARCH}-strip" ./configure --host=${HOST_ARCH} --prefix=/tmp/prefix \
+      --with-lib-path=/tmp/prefix/lib \
+      --with-include-path=/tmp/prefix/include && \
+    make && make install
+

vendor/nettle-sys-2.3.0/docs/index.html

@@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+  <head>
+    <title>nettle-sys Documentation</title>
+    <meta http-equiv="refresh" content="2; URL=/nettle-sys/nettle_sys/">
+    <meta name="keywords" content="automatic redirection">
+  </head>
+  <body lang="en">
+    Redirecting to <a href="/nettle-sys/nettle_sys/">nettle-sys documentation</a>...
+  </body>
+</html>

vendor/nettle-sys-2.3.0/ocb-stubs.rs

@@ -0,0 +1,78 @@
+// Stubs used when Nettle doesn't support OCB.
+
+#[repr(C)]
+pub struct ocb_ctx {}
+
+#[repr(C)]
+pub struct ocb_key {}
+
+pub const OCB_BLOCK_SIZE: u32 = 16;
+pub const OCB_DIGEST_SIZE: u32 = 16;
+pub const OCB_MAX_NONCE_SIZE: u32 = 15;
+
+pub unsafe fn nettle_ocb_decrypt(
+    _ctx: *mut ocb_ctx,
+    _key: *const ocb_key,
+    _encrypt_ctx: *const libc::c_void,
+    _encrypt: nettle_cipher_func,
+    _decrypt_ctx: *const libc::c_void,
+    _decrypt: nettle_cipher_func,
+    _length: usize,
+    _dst: *mut u8,
+    _src: *const u8
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}
+
+pub unsafe fn nettle_ocb_digest(
+    _ctx: *mut ocb_ctx,
+    _key: *const ocb_key,
+    _cipher: *const libc::c_void,
+    _f: nettle_cipher_func,
+    _length: usize,
+    _digest: *mut u8
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}
+
+pub unsafe fn nettle_ocb_encrypt(
+    _ctx: *mut ocb_ctx,
+    _key: *const ocb_key,
+    _cipher: *const libc::c_void,
+    _f: nettle_cipher_func,
+    _length: usize,
+    _dst: *mut u8,
+    _src: *const u8
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}
+
+pub unsafe fn nettle_ocb_set_key(
+    _key: *mut ocb_key,
+    _cipher: *const libc::c_void,
+    _f: nettle_cipher_func
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}
+
+pub unsafe fn nettle_ocb_set_nonce(
+    _ctx: *mut ocb_ctx,
+    _cipher: *const libc::c_void,
+    _f: nettle_cipher_func,
+    _tag_length: usize,
+    _nonce_length: usize,
+    _nonce: *const u8
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}
+
+pub unsafe fn nettle_ocb_update(
+    _ctx: *mut ocb_ctx,
+    _key: *const ocb_key,
+    _cipher: *const libc::c_void,
+    _f: nettle_cipher_func,
+    _length: usize,
+    _data: *const u8
+) {
+    unimplemented!("This version of Nettle does not support the operation");
+}

vendor/nettle-sys-2.3.0/src/lib.rs

@@ -0,0 +1,23 @@
+#![allow(non_upper_case_globals)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::mem::zeroed;
+
+    #[test]
+    fn sha1_nothing() {
+        unsafe {
+            let mut digest = vec![0u8; SHA1_DIGEST_SIZE as usize];
+            let mut ctx = zeroed::<sha1_ctx>();
+
+            nettle_sha1_init(&mut ctx as *mut _);
+            nettle_sha1_digest(&mut ctx as *mut _, SHA1_DIGEST_SIZE as usize, digest.as_mut_ptr());
+            assert_eq!(digest, b"\xda\x39\xa3\xee\x5e\x6b\x4b\x0d\x32\x55\xbf\xef\x95\x60\x18\x90\xaf\xd8\x07\x09");
+        }
+    }
+}

vendor/v4l2-sys-mit-0.3.0/.cargo_vcs_info.json

@@ -0,0 +1,6 @@
+{
+  "git": {
+    "sha1": "cf6d4125d3f37f24d18c325fd369f503d9f12a88"
+  },
+  "path_in_vcs": "v4l2-sys"
+}

vendor/v4l2-sys-mit-0.3.0/Cargo.toml

@@ -0,0 +1,23 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+name = "v4l2-sys-mit"
+version = "0.3.0"
+authors = ["Christopher N. Hesse <raymanfx@gmail.com>"]
+build = "build.rs"
+description = "Raw v4l2 bindings (MIT licensed)"
+license = "MIT"
+
+[build-dependencies.bindgen]
+version = "0.68.1"
+default-features = false

vendor/v4l2-sys-mit-0.3.0/Cargo.toml.orig

@@ -0,0 +1,11 @@
+[package]
+name = "v4l2-sys-mit"
+description = "Raw v4l2 bindings (MIT licensed)"
+version = "0.3.0"
+authors = ["Christopher N. Hesse <raymanfx@gmail.com>"]
+edition = "2018"
+license = "MIT"
+build = "build.rs"
+
+[build-dependencies]
+bindgen = "0.65.1"

vendor/v4l2-sys-mit-0.3.0/build.rs

@@ -0,0 +1,16 @@
+extern crate bindgen;
+
+use std::env;
+use std::path::PathBuf;
+
+fn main() {
+    let bindings = bindgen::Builder::default()
+        .header("wrapper.h")
+        .generate()
+        .expect("Failed to generate bindings");
+
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+    bindings
+        .write_to_file(out_path.join("v4l2_bindings.rs"))
+        .expect("Failed to write bindings");
+}

vendor/v4l2-sys-mit-0.3.0/src/lib.rs

@@ -0,0 +1,9 @@
+#![allow(clippy::all)]
+#![allow(deref_nullptr)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+#![allow(non_upper_case_globals)]
+// https://github.com/rust-lang/rust-bindgen/issues/1651
+#![allow(unaligned_references)]
+
+include!(concat!(env!("OUT_DIR"), "/v4l2_bindings.rs"));

vendor/v4l2-sys-mit-0.3.0/wrapper.h

@@ -0,0 +1 @@
+#include <linux/videodev2.h>