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cksum: properly handle cases where --lenghth is 0 or >512

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This commit is contained in:
Vardhan Patil 2023-12-30 20:28:03 +05:30
parent e1863ac64e
commit e7cb4e9ff0
1 changed files with 33 additions and 20 deletions
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53
src/uu/cksum/src/cksum.rs
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@ -244,28 +244,41 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
let input_length = matches.get_one::<usize>(options::LENGTH);
let length = if let Some(length) = input_length {
if length % 8 != 0 {
// GNU's implementation seem to use these quotation marks
// in their error messages, so we do the same.
uucore::show_error!("invalid length: \u{2018}{length}\u{2019}");
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"length is not a multiple of 8",
)
.into());
}
match length.to_owned() {
n if n == 0 => None,
n if n % 8 != 0 => {
// GNU's implementation seem to use these quotation marks
// in their error messages, so we do the same.
uucore::show_error!("invalid length: \u{2018}{length}\u{2019}");
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"length is not a multiple of 8",
)
.into());
}
n if n > 512 => {
uucore::show_error!("invalid length: \u{2018}{length}\u{2019}");
if algo_name != ALGORITHM_OPTIONS_BLAKE2B {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"--length is only supported with --algorithm=blake2b",
)
.into());
}
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"maximum digest length for \u{2018}BLAKE2b\u{2019} is 512 bits",
)
.into());
}
n => {
if algo_name != ALGORITHM_OPTIONS_BLAKE2B {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"--length is only supported with --algorithm=blake2b",
)
.into());
}
// Divide by 8, as our blake2b implementation expects bytes
// instead of bits.
Some(length / 8)
// Divide by 8, as our blake2b implementation expects bytes
// instead of bits.
Some(n / 8)
}
}
} else {
None
};