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rust-bitcoin-unsafe-fast
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Remove hex_from_slice and display Sighash forwards 

`Sighash` should be displayed forwards according to BIP143. Currently we
are displaying it backwards (as we do for double SHA256). This is
working because parse using `Vec::from_hex`.

We have the means to parse hex strings directly for hashes, we no longer
need `hex_from_slice`.

BIP143 test vectors display double SHA256 forwards but we display
backwards, this is acceptable because there is no fixed display in the
ecosystem for double SHA256 hashes. In order to overcome this we parse
test vector hex strings with into `Vec` when needed.
This commit is contained in:
Tobin C. Harding 2023-01-20 14:44:13 +11:00
parent a308e1e2ea
commit 32ca6cc320
No known key found for this signature in database
GPG Key ID: 40BF9E4C269D6607
4 changed files with 27 additions and 63 deletions
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2
bitcoin/src/hash_types.rs
View File

@ -45,7 +45,7 @@ See [`hashes::Hash::DISPLAY_BACKWARD`] for more details.
");
hash_newtype!(Wtxid, sha256d::Hash, 32, doc="A bitcoin witness transaction ID.");
hash_newtype!(BlockHash, sha256d::Hash, 32, doc="A bitcoin block hash.");
hash_newtype!(Sighash, sha256d::Hash, 32, doc="Hash of the transaction according to the signature algorithm");
hash_newtype!(Sighash, sha256d::Hash, 32, doc="Hash of the transaction according to the signature algorithm", false);
impl secp256k1::ThirtyTwoByteHash for Sighash {
fn into_32(self) -> [u8; 32] {
use hashes::Hash;

30
bitcoin/src/internal_macros.rs
View File

@ -51,39 +51,9 @@ pub(crate) use test_macros::*;
#[cfg(test)]
mod test_macros {
use crate::hashes::hex::FromHex;
/// Trait used to create a value from hex string for testing purposes.
pub(crate) trait TestFromHex {
/// Produces the value from hex.
///
/// ## Panics
///
/// The function panics if the hex or the value is invalid.
fn test_from_hex(hex: &str) -> Self;
}
impl<T: FromHex> TestFromHex for T {
fn test_from_hex(hex: &str) -> Self { Self::from_hex(hex).unwrap() }
}
macro_rules! hex (($hex:expr) => (<Vec<u8> as hashes::hex::FromHex>::from_hex($hex).unwrap()));
pub(crate) use hex;
// For types that can't use TestFromHex due to coherence rules or reversed hex
macro_rules! hex_from_slice {
($hex:expr) => {
$crate::internal_macros::hex_from_slice!(_, $hex)
};
($type:ty, $hex:expr) => {
<$type>::from_slice(
&<$crate::prelude::Vec<u8> as $crate::hashes::hex::FromHex>::from_hex($hex)
.unwrap(),
)
.unwrap()
};
}
pub(crate) use hex_from_slice;
}
/// Implements several traits for byte-based newtypes.

2
bitcoin/src/psbt/mod.rs
View File

@ -1397,7 +1397,7 @@ mod tests {
#[cfg(feature = "std")]
assert_eq!(err.to_string(), "hash parse error");
#[cfg(not(feature = "std"))]
assert_eq!(err.to_string(), "hash parse error: bad slice length 33 (expected 32)");
assert_eq!(err.to_string(), "hash parse error: invalid slice length 33 (expected 32)");
let err = hex_psbt!("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").unwrap_err();
#[cfg(feature = "std")]
assert_eq!(err.to_string(), "invalid Schnorr signature");

56
bitcoin/src/sighash.rs
View File

@ -1057,7 +1057,7 @@ mod tests {
use crate::hash_types::Sighash;
use crate::hashes::hex::FromHex;
use crate::hashes::{Hash, HashEngine};
use crate::internal_macros::{hex, hex_from_slice};
use crate::internal_macros::hex;
use crate::network::constants::Network;
use crate::taproot::{TapLeafHash, TapSighashHash};
@ -1621,24 +1621,22 @@ mod tests {
let mut cache = SighashCache::new(&tx);
assert_eq!(
cache.segwit_signature_hash(1, &witness_script, value, EcdsaSighashType::All).unwrap(),
hex_from_slice!(
Sighash,
"c37af31116d1b27caf68aae9e3ac82f1477929014d5b917657d0eb49478cb670"
)
"c37af31116d1b27caf68aae9e3ac82f1477929014d5b917657d0eb49478cb670".parse::<Sighash>().unwrap(),
);
let cache = cache.segwit_cache();
// Parse hex into Vec because BIP143 test vector displays forwards but our sha256d::Hash displays backwards.
assert_eq!(
cache.prevouts,
hex_from_slice!("96b827c8483d4e9b96712b6713a7b68d6e8003a781feba36c31143470b4efd37")
cache.prevouts.into_inner().as_ref(),
&Vec::from_hex("96b827c8483d4e9b96712b6713a7b68d6e8003a781feba36c31143470b4efd37").unwrap()[..],
);
assert_eq!(
cache.sequences,
hex_from_slice!("52b0a642eea2fb7ae638c36f6252b6750293dbe574a806984b8e4d8548339a3b")
cache.sequences.into_inner().as_ref(),
&Vec::from_hex("52b0a642eea2fb7ae638c36f6252b6750293dbe574a806984b8e4d8548339a3b").unwrap()[..],
);
assert_eq!(
cache.outputs,
hex_from_slice!("863ef3e1a92afbfdb97f31ad0fc7683ee943e9abcf2501590ff8f6551f47e5e5")
cache.outputs.into_inner().as_ref(),
&Vec::from_hex("863ef3e1a92afbfdb97f31ad0fc7683ee943e9abcf2501590ff8f6551f47e5e5").unwrap()[..],
);
}
@ -1659,24 +1657,22 @@ mod tests {
let mut cache = SighashCache::new(&tx);
assert_eq!(
cache.segwit_signature_hash(0, &witness_script, value, EcdsaSighashType::All).unwrap(),
hex_from_slice!(
Sighash,
"64f3b0f4dd2bb3aa1ce8566d220cc74dda9df97d8490cc81d89d735c92e59fb6"
)
"64f3b0f4dd2bb3aa1ce8566d220cc74dda9df97d8490cc81d89d735c92e59fb6".parse::<Sighash>().unwrap(),
);
let cache = cache.segwit_cache();
// Parse hex into Vec because BIP143 test vector displays forwards but our sha256d::Hash displays backwards.
assert_eq!(
cache.prevouts,
hex_from_slice!("b0287b4a252ac05af83d2dcef00ba313af78a3e9c329afa216eb3aa2a7b4613a")
cache.prevouts.into_inner().as_ref(),
&Vec::from_hex("b0287b4a252ac05af83d2dcef00ba313af78a3e9c329afa216eb3aa2a7b4613a").unwrap()[..],
);
assert_eq!(
cache.sequences,
hex_from_slice!("18606b350cd8bf565266bc352f0caddcf01e8fa789dd8a15386327cf8cabe198")
cache.sequences.into_inner().as_ref(),
&Vec::from_hex("18606b350cd8bf565266bc352f0caddcf01e8fa789dd8a15386327cf8cabe198").unwrap()[..],
);
assert_eq!(
cache.outputs,
hex_from_slice!("de984f44532e2173ca0d64314fcefe6d30da6f8cf27bafa706da61df8a226c83")
cache.outputs.into_inner().as_ref(),
&Vec::from_hex("de984f44532e2173ca0d64314fcefe6d30da6f8cf27bafa706da61df8a226c83").unwrap()[..],
);
}
@ -1702,24 +1698,22 @@ mod tests {
let mut cache = SighashCache::new(&tx);
assert_eq!(
cache.segwit_signature_hash(0, &witness_script, value, EcdsaSighashType::All).unwrap(),
hex_from_slice!(
Sighash,
"185c0be5263dce5b4bb50a047973c1b6272bfbd0103a89444597dc40b248ee7c"
)
"185c0be5263dce5b4bb50a047973c1b6272bfbd0103a89444597dc40b248ee7c".parse::<Sighash>().unwrap(),
);
let cache = cache.segwit_cache();
// Parse hex into Vec because BIP143 test vector displays forwards but our sha256d::Hash displays backwards.
assert_eq!(
cache.prevouts,
hex_from_slice!("74afdc312af5183c4198a40ca3c1a275b485496dd3929bca388c4b5e31f7aaa0")
cache.prevouts.into_inner().as_ref(),
&Vec::from_hex("74afdc312af5183c4198a40ca3c1a275b485496dd3929bca388c4b5e31f7aaa0").unwrap()[..],
);
assert_eq!(
cache.sequences,
hex_from_slice!("3bb13029ce7b1f559ef5e747fcac439f1455a2ec7c5f09b72290795e70665044")
cache.sequences.into_inner().as_ref(),
&Vec::from_hex("3bb13029ce7b1f559ef5e747fcac439f1455a2ec7c5f09b72290795e70665044").unwrap()[..],
);
assert_eq!(
cache.outputs,
hex_from_slice!("bc4d309071414bed932f98832b27b4d76dad7e6c1346f487a8fdbb8eb90307cc")
cache.outputs.into_inner().as_ref(),
&Vec::from_hex("bc4d309071414bed932f98832b27b4d76dad7e6c1346f487a8fdbb8eb90307cc").unwrap()[..],
);
}
}