Merging upstream version 1.70.0+dfsg2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

14 files changed, 949 insertions, 0 deletions

diff --git a/vendor/base16ct/.cargo-checksum.json b/vendor/base16ct/.cargo-checksum.json
new file mode 100644
index 000000000..644cc2105
--- /dev/null
+++ b/vendor/base16ct/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"CHANGELOG.md":"b74f249225e74ce70e911b3569a40e812d1941d13d5ef0ed6def2665943eca09","Cargo.toml":"d4406c7f39662e1feee04d54b308159eff624fe2f9b0127e0b14daaf7f03f861","LICENSE-APACHE":"a9040321c3712d8fd0b09cf52b17445de04a23a10165049ae187cd39e5c86be5","LICENSE-MIT":"0aa8963e105e8b6e02f634484145d4e5b0f42d0a6dd05c16f8148f033383adef","README.md":"3ec555623fab4feb5f805dbb0935a3408e8068b86f517c0b28edc171fd88f2a8","benches/mod.rs":"976e6c0443e69a0578a2cf2252c4ed486ff0dc39823d0c369625e31c89941657","src/display.rs":"7042d46254a4fe4c1d66fe41be90916010247fd6dbdf3e87532541aa1a199696","src/error.rs":"8c5ac9c8d2d3b6fe18d8cf56d7e48149fb4d44c32ccb71f566f243c70e9bb187","src/lib.rs":"75378dac02301ce69e419e58b98ff32f1f009f3cf4ef49b5c0791cdfa7d23abc","src/lower.rs":"d9a0a85be650d4d2b5154cd5886b95051314e6c5a53a9f8450dea2eeb1a0e553","src/mixed.rs":"f5fe584f2fb275ae28ce6c253b9faf8912038bbb83c331ad7f715c49ab8369a5","src/upper.rs":"5bae380ba3e515d4da7f498517d9f0ed9cf57416203a2d71474730f4bb4e6efe","tests/lib.rs":"1b5ae439670c8c1ca3843922bd484dc642b660d91f401a29fa279d9e01fdab92"},"package":"349a06037c7bf932dd7e7d1f653678b2038b9ad46a74102f1fc7bd7872678cce"}
\ No newline at end of file
diff --git a/vendor/base16ct/CHANGELOG.md b/vendor/base16ct/CHANGELOG.md
new file mode 100644
index 000000000..808c55253
--- /dev/null
+++ b/vendor/base16ct/CHANGELOG.md
@@ -0,0 +1,14 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## 0.1.1 (2022-01-15)
+### Added
+- `HexDisplay` type ([#329])
+
+[#329]: https://github.com/RustCrypto/formats/pull/329
+
+## 0.1.0 (2022-01-12)
+- Initial release
diff --git a/vendor/base16ct/Cargo.toml b/vendor/base16ct/Cargo.toml
new file mode 100644
index 000000000..dfeb08fdf
--- /dev/null
+++ b/vendor/base16ct/Cargo.toml
@@ -0,0 +1,32 @@
+# 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 = "2021"
+rust-version = "1.56"
+name = "base16ct"
+version = "0.1.1"
+authors = ["RustCrypto Developers"]
+description = "Pure Rust implementation of Base16 a.k.a hexadecimal (RFC 4648) which avoids\nany usages of data-dependent branches/LUTs and thereby provides portable\n\"best effort\" constant-time operation and embedded-friendly no_std support\n"
+documentation = "https://docs.rs/base16ct"
+readme = "README.md"
+keywords = ["crypto", "hex", "pem", "phc"]
+categories = ["cryptography", "encoding", "no-std", "parser-implementations"]
+license = "Apache-2.0 OR MIT"
+repository = "https://github.com/RustCrypto/formats/tree/master/base16ct"
+resolver = "2"
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[features]
+alloc = []
+std = ["alloc"]
diff --git a/vendor/base16ct/LICENSE-APACHE b/vendor/base16ct/LICENSE-APACHE
new file mode 100644
index 000000000..78173fa2e
--- /dev/null
+++ b/vendor/base16ct/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
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+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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diff --git a/vendor/base16ct/LICENSE-MIT b/vendor/base16ct/LICENSE-MIT
new file mode 100644
index 000000000..f151c9982
--- /dev/null
+++ b/vendor/base16ct/LICENSE-MIT
@@ -0,0 +1,26 @@
+Copyright (c) 2014 Steve "Sc00bz" Thomas (steve at tobtu dot com)
+Copyright (c) 2022 The RustCrypto Project Developers
+
+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/vendor/base16ct/README.md b/vendor/base16ct/README.md
new file mode 100644
index 000000000..fad88dbf8
--- /dev/null
+++ b/vendor/base16ct/README.md
@@ -0,0 +1,60 @@
+# [RustCrypto]: Constant-Time Base16 (hexadecimal)
+
+[![crate][crate-image]][crate-link]
+[![Docs][docs-image]][docs-link]
+[![Build Status][build-image]][build-link]
+![Apache2/MIT licensed][license-image]
+![Rust Version][rustc-image]
+[![Project Chat][chat-image]][chat-link]
+
+Pure Rust implementation of Base16 ([RFC 4648]).
+
+Implements lower and upper case Base16 variants without data-dependent branches
+or lookup  tables, thereby providing portable "best effort" constant-time
+operation.
+
+Supports `no_std` environments and avoids heap allocations in the core API
+(but also provides optional `alloc` support for convenience).
+
+[Documentation][docs-link]
+
+## Minimum Supported Rust Version
+
+This crate requires **Rust 1.56** at a minimum.
+
+We may change the MSRV in the future, but it will be accompanied by a minor
+version bump.
+
+## License
+
+Licensed under either of:
+
+ * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
+ * [MIT license](http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
+
+[//]: # (badges)
+
+[crate-image]: https://img.shields.io/crates/v/base16ct.svg
+[crate-link]: https://crates.io/crates/base16ct
+[docs-image]: https://docs.rs/base16ct/badge.svg
+[docs-link]: https://docs.rs/base16ct/
+[build-image]: https://github.com/RustCrypto/formats/actions/workflows/base16ct.yml/badge.svg
+[build-link]: https://github.com/RustCrypto/formats/actions/workflows/base16ct.yml
+[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
+[rustc-image]: https://img.shields.io/badge/rustc-1.56+-blue.svg
+[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
+[chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/300570-formats
+
+[//]: # (links)
+
+[RustCrypto]: https://github.com/rustcrypto
+[RFC 4648]: https://tools.ietf.org/html/rfc4648
+[Util::Lookup]: https://arxiv.org/pdf/2108.04600.pdf
diff --git a/vendor/base16ct/benches/mod.rs b/vendor/base16ct/benches/mod.rs
new file mode 100644
index 000000000..75af0c9db
--- /dev/null
+++ b/vendor/base16ct/benches/mod.rs
@@ -0,0 +1,69 @@
+#![feature(test)]
+extern crate test;
+
+use test::{black_box, Bencher};
+
+#[bench]
+fn decode_lower(b: &mut Bencher) {
+    let input = vec![b'1'; 1 << 14];
+    let mut buf = vec![0u8; 1 << 13];
+
+    b.iter(|| {
+        let input = black_box(&input[..]);
+        let res = base16ct::lower::decode(input, &mut buf).unwrap();
+        black_box(res);
+    });
+    b.bytes = input.len() as u64;
+}
+
+#[bench]
+fn decode_upper(b: &mut Bencher) {
+    let input = vec![b'1'; 1 << 14];
+    let mut buf = vec![0u8; 1 << 13];
+
+    b.iter(|| {
+        let input = black_box(&input[..]);
+        let res = base16ct::upper::decode(input, &mut buf).unwrap();
+        black_box(res);
+    });
+    b.bytes = input.len() as u64;
+}
+
+#[bench]
+fn decode_mixed(b: &mut Bencher) {
+    let input = vec![b'1'; 1 << 14];
+    let mut buf = vec![0u8; 1 << 13];
+
+    b.iter(|| {
+        let input = black_box(&input[..]);
+        let res = base16ct::mixed::decode(input, &mut buf).unwrap();
+        black_box(res);
+    });
+    b.bytes = input.len() as u64;
+}
+
+#[bench]
+fn encode_lower(b: &mut Bencher) {
+    let input = vec![0x42; 1 << 14];
+    let mut buf = vec![0u8; 1 << 15];
+
+    b.iter(|| {
+        let input = black_box(&input[..]);
+        let res = base16ct::lower::encode(input, &mut buf).unwrap();
+        black_box(res);
+    });
+    b.bytes = input.len() as u64;
+}
+
+#[bench]
+fn encode_upper(b: &mut Bencher) {
+    let input = vec![0x42; 1 << 14];
+    let mut buf = vec![0u8; 1 << 15];
+
+    b.iter(|| {
+        let input = black_box(&input[..]);
+        let res = base16ct::upper::encode(input, &mut buf).unwrap();
+        black_box(res);
+    });
+    b.bytes = input.len() as u64;
+}
diff --git a/vendor/base16ct/src/display.rs b/vendor/base16ct/src/display.rs
new file mode 100644
index 000000000..1397a91dd
--- /dev/null
+++ b/vendor/base16ct/src/display.rs
@@ -0,0 +1,35 @@
+use core::fmt;
+
+/// `core::fmt` presenter for binary data encoded as hexadecimal (Base16).
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub struct HexDisplay<'a>(pub &'a [u8]);
+
+impl fmt::Display for HexDisplay<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:X}", self)
+    }
+}
+
+impl fmt::UpperHex for HexDisplay<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut hex = [0u8; 2];
+
+        for &byte in self.0 {
+            f.write_str(crate::upper::encode_str(&[byte], &mut hex)?)?;
+        }
+
+        Ok(())
+    }
+}
+
+impl fmt::LowerHex for HexDisplay<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut hex = [0u8; 2];
+
+        for &byte in self.0 {
+            f.write_str(crate::lower::encode_str(&[byte], &mut hex)?)?;
+        }
+
+        Ok(())
+    }
+}
diff --git a/vendor/base16ct/src/error.rs b/vendor/base16ct/src/error.rs
new file mode 100644
index 000000000..a5f99c2ea
--- /dev/null
+++ b/vendor/base16ct/src/error.rs
@@ -0,0 +1,32 @@
+use core::fmt;
+
+/// Result type with the `base16ct` crate's [`Error`] type.
+pub type Result<T> = core::result::Result<T, Error>;
+
+/// Error type
+#[derive(Clone, Eq, PartialEq, Debug)]
+pub enum Error {
+    /// Invalid encoding of provided Base16 string.
+    InvalidEncoding,
+
+    /// Insufficient output buffer length.
+    InvalidLength,
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Error::InvalidEncoding => f.write_str("invalid Base16 encoding"),
+            Error::InvalidLength => f.write_str("invalid Base16 length"),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {}
+
+impl From<Error> for core::fmt::Error {
+    fn from(_: Error) -> core::fmt::Error {
+        core::fmt::Error::default()
+    }
+}
diff --git a/vendor/base16ct/src/lib.rs b/vendor/base16ct/src/lib.rs
new file mode 100644
index 000000000..413d512d8
--- /dev/null
+++ b/vendor/base16ct/src/lib.rs
@@ -0,0 +1,118 @@
+//! Pure Rust implementation of Base16 ([RFC 4648], a.k.a. hex).
+//!
+//! Implements lower and upper case Base16 variants without data-dependent branches
+//! or lookup  tables, thereby providing portable "best effort" constant-time
+//! operation. Not constant-time with respect to message length (only data).
+//!
+//! Supports `no_std` environments and avoids heap allocations in the core API
+//! (but also provides optional `alloc` support for convenience).
+//!
+//! Based on code from: <https://github.com/Sc00bz/ConstTimeEncoding/blob/master/hex.cpp>
+//!
+//! # Examples
+//! ```
+//! let lower_hex_str = "abcd1234";
+//! let upper_hex_str = "ABCD1234";
+//! let mixed_hex_str = "abCD1234";
+//! let raw = b"\xab\xcd\x12\x34";
+//!
+//! let mut buf = [0u8; 16];
+//! // length of return slice can be different from the input buffer!
+//! let res = base16ct::lower::decode(lower_hex_str, &mut buf).unwrap();
+//! assert_eq!(res, raw);
+//! let res = base16ct::lower::encode(raw, &mut buf).unwrap();
+//! assert_eq!(res, lower_hex_str.as_bytes());
+//! // you also can use `encode_str` and `encode_string` to get
+//! // `&str` and `String` respectively
+//! let res: &str = base16ct::lower::encode_str(raw, &mut buf).unwrap();
+//! assert_eq!(res, lower_hex_str);
+//!
+//! let res = base16ct::upper::decode(upper_hex_str, &mut buf).unwrap();
+//! assert_eq!(res, raw);
+//! let res = base16ct::upper::encode(raw, &mut buf).unwrap();
+//! assert_eq!(res, upper_hex_str.as_bytes());
+//!
+//! // In cases when you don't know if input contains upper or lower
+//! // hex-encoded value, then use functions from the `mixed` module
+//! let res = base16ct::mixed::decode(lower_hex_str, &mut buf).unwrap();
+//! assert_eq!(res, raw);
+//! let res = base16ct::mixed::decode(upper_hex_str, &mut buf).unwrap();
+//! assert_eq!(res, raw);
+//! let res = base16ct::mixed::decode(mixed_hex_str, &mut buf).unwrap();
+//! assert_eq!(res, raw);
+//! ```
+//!
+//! [RFC 4648]: https://tools.ietf.org/html/rfc4648
+
+#![no_std]
+#![cfg_attr(docsrs, feature(doc_cfg))]
+#![warn(missing_docs, rust_2018_idioms)]
+#![doc(
+    html_logo_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg",
+    html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg",
+    html_root_url = "https://docs.rs/base16ct/0.1.1"
+)]
+
+#[cfg(feature = "alloc")]
+#[macro_use]
+extern crate alloc;
+#[cfg(feature = "std")]
+extern crate std;
+
+/// Function for decoding and encoding lower Base16 (hex)
+pub mod lower;
+/// Function for decoding mixed Base16 (hex)
+pub mod mixed;
+/// Function for decoding and encoding upper Base16 (hex)
+pub mod upper;
+
+/// Display formatter for hex.
+mod display;
+/// Error types.
+mod error;
+
+pub use crate::{
+    display::HexDisplay,
+    error::{Error, Result},
+};
+
+#[cfg(feature = "alloc")]
+use alloc::{string::String, vec::Vec};
+
+/// Compute decoded length of the given hex-encoded input.
+#[inline(always)]
+pub fn decoded_len(bytes: &[u8]) -> Result<usize> {
+    if bytes.len() & 1 == 0 {
+        Ok(bytes.len() / 2)
+    } else {
+        Err(Error::InvalidLength)
+    }
+}
+
+/// Get the length of Base16 (hex) produced by encoding the given bytes.
+#[inline(always)]
+pub fn encoded_len(bytes: &[u8]) -> usize {
+    bytes.len() * 2
+}
+
+fn decode_inner<'a>(
+    src: &[u8],
+    dst: &'a mut [u8],
+    decode_nibble: impl Fn(u8) -> u16,
+) -> Result<&'a [u8]> {
+    let dst = dst
+        .get_mut(..decoded_len(src)?)
+        .ok_or(Error::InvalidLength)?;
+
+    let mut err: u16 = 0;
+    for (src, dst) in src.chunks_exact(2).zip(dst.iter_mut()) {
+        let byte = (decode_nibble(src[0]) << 4) | decode_nibble(src[1]);
+        err |= byte >> 8;
+        *dst = byte as u8;
+    }
+
+    match err {
+        0 => Ok(dst),
+        _ => Err(Error::InvalidEncoding),
+    }
+}
diff --git a/vendor/base16ct/src/lower.rs b/vendor/base16ct/src/lower.rs
new file mode 100644
index 000000000..b6d9f9453
--- /dev/null
+++ b/vendor/base16ct/src/lower.rs
@@ -0,0 +1,80 @@
+use crate::{decode_inner, encoded_len, Error};
+#[cfg(feature = "alloc")]
+use crate::{decoded_len, String, Vec};
+
+/// Decode a lower Base16 (hex) string into the provided destination buffer.
+pub fn decode(src: impl AsRef<[u8]>, dst: &mut [u8]) -> Result<&[u8], Error> {
+    decode_inner(src.as_ref(), dst, decode_nibble)
+}
+
+/// Decode a lower Base16 (hex) string into a byte vector.
+#[cfg(feature = "alloc")]
+#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
+pub fn decode_vec(input: impl AsRef<[u8]>) -> Result<Vec<u8>, Error> {
+    let mut output = vec![0u8; decoded_len(input.as_ref())?];
+    decode(input, &mut output)?;
+    Ok(output)
+}
+
+/// Encode the input byte slice as lower Base16.
+///
+/// Writes the result into the provided destination slice, returning an
+/// ASCII-encoded lower Base16 (hex) string value.
+pub fn encode<'a>(src: &[u8], dst: &'a mut [u8]) -> Result<&'a [u8], Error> {
+    let dst = dst
+        .get_mut(..encoded_len(src))
+        .ok_or(Error::InvalidLength)?;
+    for (src, dst) in src.iter().zip(dst.chunks_exact_mut(2)) {
+        dst[0] = encode_nibble(src >> 4);
+        dst[1] = encode_nibble(src & 0x0f);
+    }
+    Ok(dst)
+}
+
+/// Encode input byte slice into a [`&str`] containing lower Base16 (hex).
+pub fn encode_str<'a>(src: &[u8], dst: &'a mut [u8]) -> Result<&'a str, Error> {
+    encode(src, dst).map(|r| unsafe { core::str::from_utf8_unchecked(r) })
+}
+
+/// Encode input byte slice into a [`String`] containing lower Base16 (hex).
+///
+/// # Panics
+/// If `input` length is greater than `usize::MAX/2`.
+#[cfg(feature = "alloc")]
+#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
+pub fn encode_string(input: &[u8]) -> String {
+    let elen = encoded_len(input);
+    let mut dst = vec![0u8; elen];
+    let res = encode(input, &mut dst).expect("dst length is correct");
+
+    debug_assert_eq!(elen, res.len());
+    unsafe { String::from_utf8_unchecked(dst) }
+}
+
+/// Decode a single nibble of lower hex
+#[inline(always)]
+fn decode_nibble(src: u8) -> u16 {
+    // 0-9  0x30-0x39
+    // A-F  0x41-0x46 or a-f  0x61-0x66
+    let byte = src as i16;
+    let mut ret: i16 = -1;
+
+    // 0-9  0x30-0x39
+    // if (byte > 0x2f && byte < 0x3a) ret += byte - 0x30 + 1; // -47
+    ret += (((0x2fi16 - byte) & (byte - 0x3a)) >> 8) & (byte - 47);
+    // a-f  0x61-0x66
+    // if (byte > 0x60 && byte < 0x67) ret += byte - 0x61 + 10 + 1; // -86
+    ret += (((0x60i16 - byte) & (byte - 0x67)) >> 8) & (byte - 86);
+
+    ret as u16
+}
+
+/// Encode a single nibble of hex
+#[inline(always)]
+fn encode_nibble(src: u8) -> u8 {
+    let mut ret = src as i16 + 0x30;
+    // 0-9  0x30-0x39
+    // a-f  0x61-0x66
+    ret += ((0x39i16 - ret) >> 8) & (0x61i16 - 0x3a);
+    ret as u8
+}
diff --git a/vendor/base16ct/src/mixed.rs b/vendor/base16ct/src/mixed.rs
new file mode 100644
index 000000000..50f778d80
--- /dev/null
+++ b/vendor/base16ct/src/mixed.rs
@@ -0,0 +1,38 @@
+use crate::{decode_inner, Error};
+#[cfg(feature = "alloc")]
+use crate::{decoded_len, Vec};
+
+/// Decode a mixed Base16 (hex) string into the provided destination buffer.
+pub fn decode(src: impl AsRef<[u8]>, dst: &mut [u8]) -> Result<&[u8], Error> {
+    decode_inner(src.as_ref(), dst, decode_nibble)
+}
+
+/// Decode a mixed Base16 (hex) string into a byte vector.
+#[cfg(feature = "alloc")]
+#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
+pub fn decode_vec(input: impl AsRef<[u8]>) -> Result<Vec<u8>, Error> {
+    let mut output = vec![0u8; decoded_len(input.as_ref())?];
+    decode(input, &mut output)?;
+    Ok(output)
+}
+
+/// Decode a single nibble of lower hex
+#[inline(always)]
+fn decode_nibble(src: u8) -> u16 {
+    // 0-9  0x30-0x39
+    // A-F  0x41-0x46 or a-f  0x61-0x66
+    let byte = src as i16;
+    let mut ret: i16 = -1;
+
+    // 0-9  0x30-0x39
+    // if (byte > 0x2f && byte < 0x3a) ret += byte - 0x30 + 1; // -47
+    ret += (((0x2fi16 - byte) & (byte - 0x3a)) >> 8) & (byte - 47);
+    // A-F  0x41-0x46
+    // if (byte > 0x40 && byte < 0x47) ret += byte - 0x41 + 10 + 1; // -54
+    ret += (((0x40i16 - byte) & (byte - 0x47)) >> 8) & (byte - 54);
+    // a-f  0x61-0x66
+    // if (byte > 0x60 && byte < 0x67) ret += byte - 0x61 + 10 + 1; // -86
+    ret += (((0x60i16 - byte) & (byte - 0x67)) >> 8) & (byte - 86);
+
+    ret as u16
+}
diff --git a/vendor/base16ct/src/upper.rs b/vendor/base16ct/src/upper.rs
new file mode 100644
index 000000000..679006e21
--- /dev/null
+++ b/vendor/base16ct/src/upper.rs
@@ -0,0 +1,80 @@
+use crate::{decode_inner, encoded_len, Error};
+#[cfg(feature = "alloc")]
+use crate::{decoded_len, String, Vec};
+
+/// Decode an upper Base16 (hex) string into the provided destination buffer.
+pub fn decode(src: impl AsRef<[u8]>, dst: &mut [u8]) -> Result<&[u8], Error> {
+    decode_inner(src.as_ref(), dst, decode_nibble)
+}
+
+/// Decode an upper Base16 (hex) string into a byte vector.
+#[cfg(feature = "alloc")]
+#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
+pub fn decode_vec(input: impl AsRef<[u8]>) -> Result<Vec<u8>, Error> {
+    let mut output = vec![0u8; decoded_len(input.as_ref())?];
+    decode(input, &mut output)?;
+    Ok(output)
+}
+
+/// Encode the input byte slice as upper Base16.
+///
+/// Writes the result into the provided destination slice, returning an
+/// ASCII-encoded upper Base16 (hex) string value.
+pub fn encode<'a>(src: &[u8], dst: &'a mut [u8]) -> Result<&'a [u8], Error> {
+    let dst = dst
+        .get_mut(..encoded_len(src))
+        .ok_or(Error::InvalidLength)?;
+    for (src, dst) in src.iter().zip(dst.chunks_exact_mut(2)) {
+        dst[0] = encode_nibble(src >> 4);
+        dst[1] = encode_nibble(src & 0x0f);
+    }
+    Ok(dst)
+}
+
+/// Encode input byte slice into a [`&str`] containing upper Base16 (hex).
+pub fn encode_str<'a>(src: &[u8], dst: &'a mut [u8]) -> Result<&'a str, Error> {
+    encode(src, dst).map(|r| unsafe { core::str::from_utf8_unchecked(r) })
+}
+
+/// Encode input byte slice into a [`String`] containing upper Base16 (hex).
+///
+/// # Panics
+/// If `input` length is greater than `usize::MAX/2`.
+#[cfg(feature = "alloc")]
+#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
+pub fn encode_string(input: &[u8]) -> String {
+    let elen = encoded_len(input);
+    let mut dst = vec![0u8; elen];
+    let res = encode(input, &mut dst).expect("dst length is correct");
+
+    debug_assert_eq!(elen, res.len());
+    unsafe { crate::String::from_utf8_unchecked(dst) }
+}
+
+/// Decode a single nibble of upper hex
+#[inline(always)]
+fn decode_nibble(src: u8) -> u16 {
+    // 0-9  0x30-0x39
+    // A-F  0x41-0x46 or a-f  0x61-0x66
+    let byte = src as i16;
+    let mut ret: i16 = -1;
+
+    // 0-9  0x30-0x39
+    // if (byte > 0x2f && byte < 0x3a) ret += byte - 0x30 + 1; // -47
+    ret += (((0x2fi16 - byte) & (byte - 0x3a)) >> 8) & (byte - 47);
+    // A-F  0x41-0x46
+    // if (byte > 0x40 && byte < 0x47) ret += byte - 0x41 + 10 + 1; // -54
+    ret += (((0x40i16 - byte) & (byte - 0x47)) >> 8) & (byte - 54);
+
+    ret as u16
+}
+
+/// Encode a single nibble of hex
+#[inline(always)]
+fn encode_nibble(src: u8) -> u8 {
+    let mut ret = src as i16 + 0x30;
+    // 0-9  0x30-0x39
+    // A-F  0x41-0x46
+    ret += ((0x39i16 - ret) >> 8) & (0x41i16 - 0x3a);
+    ret as u8
+}
diff --git a/vendor/base16ct/tests/lib.rs b/vendor/base16ct/tests/lib.rs
new file mode 100644
index 000000000..eef1b5b84
--- /dev/null
+++ b/vendor/base16ct/tests/lib.rs
@@ -0,0 +1,163 @@
+//! Integration tests.
+
+/// Hexadecimal test vectors
+struct HexVector {
+    /// Raw bytes
+    raw: &'static [u8],
+    /// Lower hex encoded
+    lower_hex: &'static [u8],
+    /// Upper hex encoded
+    upper_hex: &'static [u8],
+}
+
+const HEX_TEST_VECTORS: &[HexVector] = &[
+    HexVector {
+        raw: b"",
+        lower_hex: b"",
+        upper_hex: b"",
+    },
+    HexVector {
+        raw: b"\0",
+        lower_hex: b"00",
+        upper_hex: b"00",
+    },
+    HexVector {
+        raw: b"***",
+        lower_hex: b"2a2a2a",
+        upper_hex: b"2A2A2A",
+    },
+    HexVector {
+        raw: b"\x01\x02\x03\x04",
+        lower_hex: b"01020304",
+        upper_hex: b"01020304",
+    },
+    HexVector {
+        raw: b"\xAD\xAD\xAD\xAD\xAD",
+        lower_hex: b"adadadadad",
+        upper_hex: b"ADADADADAD",
+    },
+    HexVector {
+        raw: b"\xFF\xFF\xFF\xFF\xFF",
+        lower_hex: b"ffffffffff",
+        upper_hex: b"FFFFFFFFFF",
+    },
+];
+
+#[test]
+fn lower_encode() {
+    for vector in HEX_TEST_VECTORS {
+        // 10 is the size of the largest encoded test vector
+        let mut buf = [0u8; 10];
+        let out = base16ct::lower::encode(vector.raw, &mut buf).unwrap();
+        assert_eq!(vector.lower_hex, out);
+    }
+}
+
+#[test]
+fn lower_decode() {
+    for vector in HEX_TEST_VECTORS {
+        // 5 is the size of the largest decoded test vector
+        let mut buf = [0u8; 5];
+        let out = base16ct::lower::decode(vector.lower_hex, &mut buf).unwrap();
+        assert_eq!(vector.raw, out);
+    }
+}
+
+#[test]
+fn lower_reject_odd_size_input() {
+    let mut out = [0u8; 3];
+    assert_eq!(
+        Err(base16ct::Error::InvalidLength),
+        base16ct::lower::decode(b"12345", &mut out),
+    )
+}
+
+#[test]
+fn upper_encode() {
+    for vector in HEX_TEST_VECTORS {
+        // 10 is the size of the largest encoded test vector
+        let mut buf = [0u8; 10];
+        let out = base16ct::upper::encode(vector.raw, &mut buf).unwrap();
+        assert_eq!(vector.upper_hex, out);
+    }
+}
+
+#[test]
+fn upper_decode() {
+    for vector in HEX_TEST_VECTORS {
+        // 5 is the size of the largest decoded test vector
+        let mut buf = [0u8; 5];
+        let out = base16ct::upper::decode(vector.upper_hex, &mut buf).unwrap();
+        assert_eq!(vector.raw, out);
+    }
+}
+
+#[test]
+fn upper_reject_odd_size_input() {
+    let mut out = [0u8; 3];
+    assert_eq!(
+        Err(base16ct::Error::InvalidLength),
+        base16ct::upper::decode(b"12345", &mut out),
+    )
+}
+
+#[test]
+fn mixed_decode() {
+    for vector in HEX_TEST_VECTORS {
+        // 5 is the size of the largest decoded test vector
+        let mut buf = [0u8; 5];
+        let out = base16ct::mixed::decode(vector.upper_hex, &mut buf).unwrap();
+        assert_eq!(vector.raw, out);
+        let out = base16ct::mixed::decode(vector.lower_hex, &mut buf).unwrap();
+        assert_eq!(vector.raw, out);
+    }
+}
+
+#[test]
+fn mixed_reject_odd_size_input() {
+    let mut out = [0u8; 3];
+    assert_eq!(
+        Err(base16ct::Error::InvalidLength),
+        base16ct::mixed::decode(b"12345", &mut out),
+    )
+}
+
+#[test]
+#[cfg(feature = "alloc")]
+fn encode_and_decode_various_lengths() {
+    let data = [b'X'; 64];
+
+    for i in 0..data.len() {
+        let encoded = base16ct::lower::encode_string(&data[..i]);
+        let decoded = base16ct::lower::decode_vec(encoded).unwrap();
+        assert_eq!(decoded.as_slice(), &data[..i]);
+
+        let encoded = base16ct::upper::encode_string(&data[..i]);
+        let decoded = base16ct::upper::decode_vec(encoded).unwrap();
+        assert_eq!(decoded.as_slice(), &data[..i]);
+
+        let encoded = base16ct::lower::encode_string(&data[..i]);
+        let decoded = base16ct::mixed::decode_vec(encoded).unwrap();
+        assert_eq!(decoded.as_slice(), &data[..i]);
+
+        let encoded = base16ct::upper::encode_string(&data[..i]);
+        let decoded = base16ct::mixed::decode_vec(encoded).unwrap();
+        assert_eq!(decoded.as_slice(), &data[..i]);
+    }
+}
+
+#[test]
+fn hex_display_upper() {
+    for vector in HEX_TEST_VECTORS {
+        let hex = format!("{:X}", base16ct::HexDisplay(vector.raw));
+        assert_eq!(hex.as_bytes(), vector.upper_hex);
+    }
+}
+
+#[test]
+fn hex_display_lower() {
+    for vector in HEX_TEST_VECTORS {
+        let hex = format!("{:x}", base16ct::HexDisplay(vector.raw));
+        assert_eq!(hex.as_bytes(), vector.lower_hex);
+    }
+}