diff options
Diffstat (limited to 'b3sum')
| -rw-r--r-- | b3sum/src/main.rs | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/b3sum/src/main.rs b/b3sum/src/main.rs index b10cff8..8d63688 100644 --- a/b3sum/src/main.rs +++ b/b3sum/src/main.rs @@ -347,6 +347,42 @@ fn parse_check_line(mut line: &str) -> Result<ParsedCheckLine> { is_escaped = true; line = &line[1..]; } + + if line.starts_with("BLAKE3 (") { + match line.rsplit_once(')') { + Some((file, hash_hex)) => { + ensure!(hash_hex.starts_with(" = "), "Invalid tagged line"); + let file_string = file[8..].to_string(); + let file_path_string = if is_escaped { + // If we detected a backslash at the start of the line earlier, now we + // need to unescape backslashes and newlines. + unescape(&file_string)? + } else { + file_string.clone().into() + }; + // Decode the hash hex. + let mut hash_bytes = [0; blake3::OUT_LEN]; + let mut hex_chars = hash_hex[3..].chars(); + let hash_hex_len = 2 * blake3::OUT_LEN; + ensure!(hash_hex.len() - 3 == hash_hex_len, "Wrong hash length"); + for byte in &mut hash_bytes { + let high_char = hex_chars.next().unwrap(); + let low_char = hex_chars.next().unwrap(); + *byte = 16 * hex_half_byte(high_char)? + hex_half_byte(low_char)?; + } + let expected_hash: blake3::Hash = hash_bytes.into(); + check_for_invalid_characters(&file_path_string)?; + return Ok(ParsedCheckLine { + file_string, + is_escaped, + file_path: file_path_string.into(), + expected_hash, + }); + } + None => ensure!(false, "Invalid tagged line"), + } + } + // The front of the line must be a hash of the usual length, followed by // two spaces. The hex characters in the hash must be lowercase for now, // though we could support uppercase too if we wanted to. |