-
Notifications
You must be signed in to change notification settings - Fork 25
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
8 changed files
with
274 additions
and
1 deletion.
There are no files selected for viewing
Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| use std::fmt::{self, Display}; | ||
|
|
||
| use bech32::primitives::decode::CheckedHrpstring; | ||
| use bech32::Bech32m; | ||
| use error_stack::{bail, ensure, Report, ResultExt}; | ||
| use regex::Regex; | ||
|
|
||
| use super::Error; | ||
|
|
||
| #[derive(Debug)] | ||
| pub struct Bech32mFormat { | ||
| pub encoded: String, | ||
| } | ||
|
|
||
| impl Bech32mFormat { | ||
| pub fn new(encoded: String) -> Self { | ||
| Self { encoded } | ||
| } | ||
|
|
||
| pub fn from_str(prefix: &str, length: usize, message_id: &str) -> Result<Self, Report<Error>> { | ||
| // The Bech32m prefix should be between 1 and 83 characters | ||
| ensure!( | ||
| !prefix.is_empty() && prefix.len() <= 83, | ||
| Error::InvalidBech32mFormat("Prefix size should be between 1 and 83".to_string()) | ||
| ); | ||
|
|
||
| let data_part_length = length.saturating_sub(prefix.len()).saturating_sub(1); | ||
| ensure!( | ||
| data_part_length >= 6, | ||
| Error::InvalidBech32mFormat( | ||
| "The data part should be at least 6 characters long".to_string() | ||
| ) | ||
| ); | ||
|
|
||
| ensure!( | ||
| prefix.chars().all(|c| { | ||
| c.is_alphanumeric() | ||
| }), | ||
| Error::InvalidBech32mFormat( | ||
| "The prefix should contain only Bech32m valid characters".to_string() | ||
| ) | ||
| ); | ||
|
|
||
| let pattern = format!("^({prefix}1[02-9ac-hj-np-z]{{{data_part_length}}})$"); | ||
|
|
||
| let regex = Regex::new(pattern.as_str()).change_context( | ||
| Error::InvalidBech32mFormat("Failed to create regex".to_string()), | ||
| )?; | ||
|
|
||
| let (_, [string]) = regex | ||
| .captures(message_id) | ||
| .ok_or(Error::InvalidMessageID { | ||
| id: message_id.to_string(), | ||
| expected_format: format!("Bech32m with '{}' prefix", prefix), | ||
| })? | ||
| .extract(); | ||
|
|
||
| verify_bech32m(string, prefix)?; | ||
|
|
||
| Ok(Self { | ||
| encoded: string.to_string(), | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| impl Display for Bech32mFormat { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| write!(f, "{}", self.encoded) | ||
| } | ||
| } | ||
|
|
||
| fn verify_bech32m(input: &str, expected_prefix: &str) -> Result<(), Report<Error>> { | ||
| let checked_bech32m = CheckedHrpstring::new::<Bech32m>(input) | ||
| .change_context(Error::InvalidBech32m(input.to_string()))?; | ||
|
|
||
| ensure!( | ||
| checked_bech32m.hrp().as_str() == expected_prefix, | ||
| Error::InvalidBech32m(format!( | ||
| "Expected prefix '{expected_prefix}' not found: '{input}'" | ||
| )) | ||
| ); | ||
|
|
||
| if checked_bech32m.data_part_ascii_no_checksum().is_empty() { | ||
| bail!(Error::InvalidBech32m(format!( | ||
| "Message Id is missing the data part: '{input}'" | ||
| ))); | ||
| } | ||
|
|
||
| Ok(()) | ||
| } | ||
|
|
||
| #[cfg(test)] | ||
| mod test { | ||
| use bech32::Hrp; | ||
| use rand::Rng; | ||
|
|
||
| use crate::assert_err_contains; | ||
|
|
||
| use super::*; | ||
|
|
||
| #[test] | ||
| fn should_pass_bech32m() { | ||
| let mut rng = rand::thread_rng(); | ||
|
|
||
| const CHARS: [char; 32] = [ | ||
| 'q', 'p', 'z', 'r', 'y', '9', 'x', '8', 'g', 'f', '2', 't', 'v', 'd', 'w', '0', 's', | ||
| '3', 'j', 'n', '5', '4', 'k', 'h', 'c', 'e', '6', 'm', 'u', 'a', '7', 'l', | ||
| ]; | ||
| let char_set = CHARS.len(); | ||
|
|
||
| for _ in 0..100 { | ||
| let hrp_str = (0..rng.gen_range(1..=83)) | ||
| .map(|_| CHARS[rng.gen_range(0..char_set)]) | ||
| .collect::<String>(); | ||
|
|
||
| let data = (0..80) | ||
| .map(|_| char::from(rng.gen_range(32..=126))) | ||
| .collect::<String>(); | ||
|
|
||
| let hrp = Hrp::parse(hrp_str.as_str()).expect("valid hrp"); | ||
| let string = | ||
| bech32::encode::<Bech32m>(hrp, data.as_bytes()).expect("failed to encode string"); | ||
|
|
||
| assert!(Bech32mFormat::from_str(hrp.as_str(), string.len(), string.as_str()).is_ok()); | ||
| } | ||
| } | ||
|
|
||
| #[test] | ||
| fn should_pass_edge_cases() { | ||
| let mut rng = rand::thread_rng(); | ||
| let data = (0..80) | ||
| .map(|_| char::from(rng.gen_range(32..=126))) | ||
| .collect::<String>(); | ||
|
|
||
| // Minimum prefix length | ||
| let hrp_str = "a"; | ||
| let hrp = Hrp::parse(hrp_str).expect("valid hrp"); | ||
| let string = | ||
| bech32::encode::<Bech32m>(hrp, data.as_bytes()).expect("failed to encode string"); | ||
|
|
||
| assert!(Bech32mFormat::from_str(hrp.as_str(), string.len(), string.as_str()).is_ok()); | ||
|
|
||
| // Maximum prefix length | ||
| let hrp_string = "a".repeat(83); | ||
| let hrp = Hrp::parse(hrp_string.as_str()).expect("valid hrp"); | ||
| let string = | ||
| bech32::encode::<Bech32m>(hrp, data.as_bytes()).expect("failed to encode string"); | ||
| assert!(Bech32mFormat::from_str(hrp.as_str(), string.len(), string.as_str()).is_ok()); | ||
| } | ||
|
|
||
| #[test] | ||
| fn should_fail_with_invalid_message_id() { | ||
| let string = "at1hs0xk375g4kvw53rcem9nyjsdw5lsv94fl065n77cpt0774nsyysdecaju"; | ||
| let hrp = "at"; | ||
|
|
||
| assert_err_contains!( | ||
| Bech32mFormat::from_str(hrp, string.len() + 1, string), | ||
| Error, | ||
| Error::InvalidMessageID { .. } | ||
| ); | ||
|
|
||
| assert_err_contains!( | ||
| Bech32mFormat::from_str(hrp, string.len() - 1, string), | ||
| Error, | ||
| Error::InvalidMessageID { .. } | ||
| ); | ||
|
|
||
| assert_err_contains!( | ||
| Bech32mFormat::from_str("au", string.len(), string), | ||
| Error, | ||
| Error::InvalidMessageID { .. } | ||
| ); | ||
| } | ||
|
|
||
| #[test] | ||
| fn should_not_pass_empty_data_part() { | ||
| let hrp_string = "a"; | ||
| let hrp = Hrp::parse(hrp_string).expect("valid hrp"); | ||
| let string = "a1"; | ||
| assert_err_contains!( | ||
| Bech32mFormat::from_str(hrp.as_str(), string.len(), string), | ||
| Error, | ||
| Error::InvalidBech32mFormat(..) | ||
| ); | ||
|
|
||
| // Minimum data part length | ||
| let data = ""; | ||
| let hrp_string = "a"; | ||
| let hrp = Hrp::parse(hrp_string).expect("valid hrp"); | ||
| let string = | ||
| bech32::encode::<Bech32m>(hrp, data.as_bytes()).expect("failed to encode string"); | ||
|
|
||
| assert_err_contains!( | ||
| Bech32mFormat::from_str(hrp.as_str(), string.len(), string.as_str()), | ||
| Error, | ||
| Error::InvalidBech32m(..) | ||
| ); | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters