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b2sum: handled 0 length case and greater than 512 case

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This commit is contained in:
Marras Antoine 2023-04-10 21:20:54 +02:00
parent 0798cfe155
commit a9e65e881c
1 changed files with 9 additions and 1 deletions
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10
src/uu/hashsum/src/hashsum.rs
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@ -67,6 +67,15 @@ fn detect_algo(
"sha512sum" => ("SHA512", Box::new(Sha512::new()) as Box<dyn Digest>, 512),
"b2sum" => match matches.get_one::<usize>("length") {
Some(length_in_bits) => {
if *length_in_bits > 512 {
crash!(1, "Invalid length (maximum digest length is 512 bits)")
}
// --length=0 falls back to default behaviour
if *length_in_bits == 0 {
return ("BLAKE2", Box::new(Blake2b::new()) as Box<dyn Digest>, 512);
}
// blake2 output size must be a multiple of 8 bits
if length_in_bits % 8 == 0 {
let length_in_bytes = length_in_bits / 8;
@ -400,7 +409,6 @@ pub fn uu_app_length() -> Command {
}
fn uu_app_opt_length(command: Command) -> Command {
// Needed for variable-length output sums (e.g. SHAKE)
command.arg(
Arg::new("length")
.short('l')