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alloc feature added, to gate unicode normalization #57

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Mar 28, 2024
Merged

alloc feature added, to gate unicode normalization #57

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michalkucharczyk Nov 15, 2023
86353a5
`alloc` feature added enabling unicode_normalization in no-std
michalkucharczyk Nov 15, 2023
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5 changes: 3 additions & 2 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -13,8 +13,9 @@ edition = "2018"

[features]
default = [ "std" ]
std = [ "unicode-normalization", "serde/std" ]
std = [ "alloc", "serde/std", "unicode-normalization/std" ]
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rand = [ "crate_rand", "rand_core" ]
alloc = [ "unicode-normalization" ]
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# Note: English is the standard for bip39 so always included
chinese-simplified = []
Expand Down Expand Up @@ -49,7 +50,7 @@ zeroize = { version = "1.5", features = ["zeroize_derive"], optional = true }

# Unexported dependnecies
bitcoin_hashes = { version = ">=0.12, <=0.13", default-features = false }
unicode-normalization = { version = "=0.1.22", optional = true }
unicode-normalization = { version = "=0.1.22", default-features = false, optional = true }
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Oh I did not notice before but I don't think this should be a fixed version? Should be version = "0.1.22".

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No then it will upgrade and this crate has repeatedly broken MSRV for some of my projects. It's an internal dep so the version used shouldn't matter. Luckily 0.1.22 now is over a year old and seems like he saturated the project too. Which is ok :)

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It makes it a bit hard to package on distributions though if dependencies get out of sync, one would have to patch the Cargo.toml file to allow other versions.

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Yeah I rekon we should handle MSRV breakage with pinning not in the manifest like this.


[dev-dependencies]
# Enabling the "rand" feature by default to run the benches
Expand Down
38 changes: 17 additions & 21 deletions src/lib.rs
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Expand Up @@ -29,30 +29,31 @@
#[cfg(any(test, feature = "std"))]
pub extern crate core;

#[cfg(feature = "alloc")]
extern crate alloc;

extern crate bitcoin_hashes;

#[cfg(feature = "std")]
#[cfg(feature = "unicode-normalization")]
extern crate unicode_normalization;

#[cfg(feature = "rand_core")]
pub extern crate rand_core;
#[cfg(feature = "rand")]
pub extern crate crate_rand as rand;
#[cfg(feature = "rand_core")]
pub extern crate rand_core;
#[cfg(feature = "serde")]
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pub extern crate serde;

#[cfg(feature = "alloc")]
use alloc::{borrow::Cow, string::ToString, vec::Vec};
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use core::{fmt, str};

#[cfg(feature = "std")]
use std::borrow::Cow;
#[cfg(feature = "std")]
use std::error;

use bitcoin_hashes::{sha256, Hash};

#[cfg(feature = "std")]
#[cfg(feature = "unicode-normalization")]
use unicode_normalization::UnicodeNormalization;

#[cfg(feature = "zeroize")]
Expand Down Expand Up @@ -95,7 +96,7 @@ impl AmbiguousLanguages {
}

/// Returns a vector of the possible languages.
#[cfg(feature = "std")]
#[cfg(feature = "alloc")]
pub fn to_vec(&self) -> Vec<Language> {
self.iter().collect()
}
Expand Down Expand Up @@ -183,7 +184,7 @@ impl Mnemonic {
/// Performing this on a [Cow] means that all allocations for normalization
/// can be avoided for languages without special UTF8 characters.
#[inline]
#[cfg(feature = "std")]
#[cfg(feature = "unicode-normalization")]
pub fn normalize_utf8_cow<'a>(cow: &mut Cow<'a, str>) {
let is_nfkd = unicode_normalization::is_nfkd_quick(cow.as_ref().chars());
if is_nfkd != unicode_normalization::IsNormalized::Yes {
Expand Down Expand Up @@ -506,7 +507,7 @@ impl Mnemonic {
}

/// Parse a mnemonic in the given language.
#[cfg(feature = "std")]
#[cfg(feature = "unicode-normalization")]
pub fn parse_in<'a, S: Into<Cow<'a, str>>>(
language: Language,
s: S,
Expand All @@ -517,7 +518,7 @@ impl Mnemonic {
}

/// Parse a mnemonic and detect the language from the enabled languages.
#[cfg(feature = "std")]
#[cfg(feature = "unicode-normalization")]
pub fn parse<'a, S: Into<Cow<'a, str>>>(s: S) -> Result<Mnemonic, Error> {
let mut cow = s.into();
Mnemonic::normalize_utf8_cow(&mut cow);
Expand All @@ -542,17 +543,12 @@ impl Mnemonic {
const PBKDF2_BYTES: usize = 64;

let mut seed = [0u8; PBKDF2_BYTES];
pbkdf2::pbkdf2(
self.words(),
normalized_passphrase.as_bytes(),
PBKDF2_ROUNDS,
&mut seed,
);
pbkdf2::pbkdf2(self.words(), normalized_passphrase.as_bytes(), PBKDF2_ROUNDS, &mut seed);
seed
}

/// Convert to seed bytes.
#[cfg(feature = "std")]
#[cfg(feature = "unicode-normalization")]
pub fn to_seed<'a, P: Into<Cow<'a, str>>>(&self, passphrase: P) -> [u8; 64] {
let normalized_passphrase = {
let mut cow = passphrase.into();
Expand Down Expand Up @@ -601,7 +597,7 @@ impl Mnemonic {
}

/// Convert the mnemonic back to the entropy used to generate it.
#[cfg(feature = "std")]
#[cfg(feature = "alloc")]
pub fn to_entropy(&self) -> Vec<u8> {
let (arr, len) = self.to_entropy_array();
arr[0..len].to_vec()
Expand Down Expand Up @@ -653,11 +649,11 @@ impl str::FromStr for Mnemonic {
type Err = Error;

fn from_str(s: &str) -> Result<Mnemonic, Error> {
#[cfg(feature = "std")]
#[cfg(feature = "unicode-normalization")]
{
Mnemonic::parse(s)
}
#[cfg(not(feature = "std"))]
#[cfg(not(feature = "unicode-normalization"))]
{
Mnemonic::parse_normalized(s)
}
Expand Down Expand Up @@ -876,7 +872,7 @@ mod tests {
mnemonic_str
);

#[cfg(feature = "std")]
#[cfg(feature = "unicode-normalization")]
{
assert_eq!(&mnemonic.to_string(), mnemonic_str, "failed vector: {}", mnemonic_str);
assert_eq!(
Expand Down