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Split digest and hexdigest for future reference

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This commit is contained in:
Patrick Auernig 2021-02-08 04:30:22 +01:00
parent 0871c18e19
commit f6744d3120
1 changed files with 10 additions and 5 deletions
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15
2015/day-04/md5.rs
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@ -39,10 +39,10 @@ fn leftrotate(x: u32, amount: usize) -> u32 {
(x << amount) | (x >> (32 - amount)) (x << amount) | (x >> (32 - amount))
} }
pub fn hexdigest<B>(message: B) -> String pub fn digest<B>(message: B) -> [u8; 16]
where B: AsRef<[u8]> where B: AsRef<[u8]>
{ {
use std::{convert::TryInto, fmt::Write}; use std::convert::TryInto;
let message = message.as_ref(); let message = message.as_ref();
let message_len = message.len(); let message_len = message.len();
@ -86,10 +86,15 @@ pub fn hexdigest<B>(message: B) -> String
d0 = d0.wrapping_add(d); d0 = d0.wrapping_add(d);
} }
let digest = [a0.to_le_bytes(), b0.to_le_bytes(), c0.to_le_bytes(), d0.to_le_bytes()].concat(); [a0.to_le_bytes(), b0.to_le_bytes(), c0.to_le_bytes(), d0.to_le_bytes()].concat().try_into().unwrap()
let hex_len = digest.len(); }
digest.into_iter().fold(String::with_capacity(hex_len), |mut acc, val| { pub fn hexdigest<B>(message: B) -> String
where B: AsRef<[u8]>
{
use std::fmt::Write;
digest(message).iter().fold(String::with_capacity(16), |mut acc, val| {
write!(acc, "{:02x}", val).unwrap(); write!(acc, "{:02x}", val).unwrap();
acc acc
}) })