Initial import of der-oid-macro-0.4.0 am: b538820ed8 am: c6ced0edfb am: 65ba932980 am: c14a5b0c7d

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/der-oid-macro/+/1770567

Change-Id: I3390a1ee6f6a3022fd06f5def0b5e9268491f466

10 files changed, 448 insertions, 0 deletions

diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
new file mode 100644
index 0000000..3c083e8
--- /dev/null
+++ b/.cargo_vcs_info.json
@@ -0,0 +1,5 @@
+{
+  "git": {
+    "sha1": "ebbea4bd6d42ad878ca2b9cdc53291f4ae19481a"
+  }
+}
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..63b3325
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,35 @@
+# 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 believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+edition = "2018"
+name = "der-oid-macro"
+version = "0.4.0"
+authors = ["Pierre Chifflier <chifflier@wzdftpd.net>", "Jannik Schürg <schuerg@ins.uni-bonn.de>"]
+description = "Macro to encode DER oids at compile time"
+homepage = "https://github.com/rusticata/der-parser"
+license = "MIT/Apache-2.0"
+repository = "https://github.com/rusticata/der-parser.git"
+
+[lib]
+proc-macro = true
+[dependencies.nom]
+version = "6.0"
+
+[dependencies.num-bigint]
+version = "0.4"
+
+[dependencies.num-traits]
+version = "0.2"
+
+[dependencies.syn]
+version = "1.0"
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
new file mode 100644
index 0000000..fbf8a6f
--- /dev/null
+++ b/Cargo.toml.orig
@@ -0,0 +1,18 @@
+[package]
+name = "der-oid-macro"
+description = "Macro to encode DER oids at compile time"
+version = "0.4.0"
+edition = "2018"
+license = "MIT/Apache-2.0"
+homepage = "https://github.com/rusticata/der-parser"
+repository = "https://github.com/rusticata/der-parser.git"
+authors = ["Pierre Chifflier <chifflier@wzdftpd.net>", "Jannik Schürg <schuerg@ins.uni-bonn.de>"]
+
+[lib]
+proc-macro = true
+
+[dependencies]
+nom = "6.0"
+num-bigint = "0.4"
+num-traits = "0.2"
+syn = "1.0"
diff --git a/LICENSE b/LICENSE
new file mode 120000
index 0000000..6b579aa
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1 @@
+LICENSE-APACHE
\ No newline at end of file
diff --git a/LICENSE-APACHE b/LICENSE-APACHE
new file mode 100644
index 0000000..16fe87b
--- /dev/null
+++ b/LICENSE-APACHE
@@ -0,0 +1,201 @@
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+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
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diff --git a/LICENSE-MIT b/LICENSE-MIT
new file mode 100644
index 0000000..290e7b9
--- /dev/null
+++ b/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2017 Pierre Chifflier
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..4280ee7
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,20 @@
+name: "der-oid-macro"
+description: "Macro to encode DER oids at compile time"
+third_party {
+  url {
+    type: HOMEPAGE
+    value: "https://crates.io/crates/der-oid-macro"
+  }
+  url {
+    type: ARCHIVE
+    value: "https://static.crates.io/crates/der-oid-macro/der-oid-macro-0.4.0.crate"
+  }
+  version: "0.4.0"
+  # Dual-licensed, using the least restrictive per go/thirdpartylicenses#same.
+  license_type: NOTICE
+  last_upgrade_date {
+    year: 2021
+    month: 7
+    day: 9
+  }
+}
diff --git a/MODULE_LICENSE_APACHE2 b/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/MODULE_LICENSE_APACHE2
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..3f9a6ad
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,4 @@
+include platform/prebuilts/rust:master:/OWNERS
+# Android Auto
+skeys@google.com
+yimingjing@google.com
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..c6f4bde
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,139 @@
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+fn parse_arg(arg: &str) -> (bool, bool, Vec<&str>) {
+    use nom::{
+        bytes::complete::{tag, take_while},
+        call,
+        character::complete::{char, digit1},
+        combinator::{map, opt, recognize, verify},
+        error::{ErrorKind, ParseError},
+        exact,
+        multi::separated_list1,
+        sequence::{delimited, terminated, tuple},
+        IResult,
+    };
+
+    fn uint<'a, E: ParseError<&'a str>>(i: &'a str) -> IResult<&'a str, &'a str, E> {
+        verify(recognize(separated_list1(char('_'), digit1)), |s: &str| {
+            s.len() == 1 || !s.starts_with('0')
+        })(i)
+    }
+
+    fn ws<'a, E: ParseError<&'a str>>(i: &'a str) -> IResult<&'a str, &'a str, E> {
+        take_while(|c| c == ' ')(i)
+    }
+
+    fn ws_dot_ws<'a, E: ParseError<&'a str>>(i: &'a str) -> IResult<&'a str, char, E> {
+        delimited(ws, char('.'), ws)(i)
+    }
+
+    fn root<'a, E: ParseError<&'a str>>(
+        i: &'a str,
+    ) -> IResult<&'a str, (bool, bool, Vec<&'a str>), E> {
+        tuple((
+            map(opt(terminated(tag("raw "), ws)), |x| x.is_some()),
+            map(opt(terminated(tag("rel "), ws)), |x| x.is_some()),
+            separated_list1(ws_dot_ws, uint),
+        ))(i)
+    }
+
+    exact!(arg.trim(), call!(root::<(&str, ErrorKind)>))
+        .expect("could not parse oid")
+        .1
+}
+
+fn encode_components(components: &[num_bigint::BigUint], relative: bool) -> Vec<u8> {
+    use num_traits::cast::ToPrimitive;
+
+    let mut enc = Vec::new();
+    let mut dec = components;
+    if !relative {
+        if dec.len() < 2 {
+            if dec.len() == 1 && dec[0] == 0u8.into() {
+                return vec![0];
+            }
+            panic!("Need at least two components for non-relative oid");
+        }
+        if dec[0] >= 7u8.into() || dec[1] >= 40u8.into() {
+            panic!("First components are too big");
+        }
+        enc.push(dec[0].to_u8().unwrap() * 40 + dec[1].to_u8().unwrap());
+        dec = &dec[2..];
+    }
+
+    for int in dec.iter() {
+        let mut bytes = int.to_bytes_be();
+        if bytes[0] == 0 {
+            enc.push(0u8);
+            continue;
+        }
+        let total_bits = (8 - bytes[0].leading_zeros()) as usize + (bytes.len() - 1) * 8;
+        let octects_needed = ((total_bits + 6) / 7).max(1);
+        enc.resize_with(enc.len() + octects_needed, Default::default);
+
+        let mut pos = enc.len() - 1;
+        let mut extra = 0u8;
+        let mut extra_size = 0u8;
+        bytes.reverse();
+        let mut bytes_stored = 0;
+        for byte in bytes.into_iter() {
+            if extra_size == 7 {
+                // there a seven bits in extra
+                enc[pos] = extra | (1 << 7);
+                bytes_stored += 1;
+                pos -= 1;
+                extra = 0;
+                extra_size = 0;
+            }
+            // make space for the extra bits
+            enc[pos] = (byte << extra_size) | extra | (1 << 7);
+            bytes_stored += 1;
+            if pos > 0 {
+                pos -= 1;
+                extra_size += 1;
+                extra = byte >> (8 - extra_size);
+            }
+        }
+        let last = enc.len() - 1;
+        if bytes_stored != octects_needed {
+            let first = last + 1 - octects_needed;
+            enc[first] = extra | (1 << 7);
+        }
+        enc[last] ^= 1 << 7;
+    }
+    enc
+}
+
+#[proc_macro]
+pub fn oid(item: TokenStream) -> TokenStream {
+    let arg = item.to_string();
+    let (raw, relative, int_strings) = parse_arg(&arg);
+    let ints: Vec<num_bigint::BigUint> = int_strings
+        .into_iter()
+        .map(|s| s.parse().unwrap())
+        .collect();
+    let enc = encode_components(&ints, relative);
+
+    let mut s = String::with_capacity(2 + 6 * enc.len());
+    s.push('[');
+    for byte in enc.iter() {
+        s.insert_str(s.len(), &format!("0x{:02x}, ", byte));
+    }
+    s.push(']');
+
+    let code = if raw {
+        s
+    } else if relative {
+        format!(
+            "der_parser::oid::Oid::new_relative(std::borrow::Cow::Borrowed(&{}))",
+            s
+        )
+    } else {
+        format!(
+            "der_parser::oid::Oid::new(std::borrow::Cow::Borrowed(&{}))",
+            s
+        )
+    };
+    code.parse().unwrap()
+}