jake/libpso
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turns out we gotta pad it out a bit to 8byte blocks

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This commit is contained in:
Jake Probst 2019-07-30 22:24:44 -07:00
parent a8b5559ac0
commit e2965699d3
1 changed files with 6 additions and 9 deletions
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15
src/crypto/bb.rs
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@ -86,13 +86,12 @@ impl PSOBBCipher {
impl PSOCipher for PSOBBCipher {
fn encrypt(&mut self, data: &Vec<u8>) -> Result<Vec<u8>, CipherError> {
if data.len() % 8 != 0 {
return Err(CipherError::InvalidSize);
}
let real_data = data.chunks(4).map(|k| {
let mut real_data = data.chunks(4).map(|k| {
u32::from_le_bytes([k[0], k[1], k[2], k[3]])
}).collect::<Vec<_>>();
if real_data.len() % 2 == 1 {
real_data.push(0);
}
let mut result = Vec::new();
for d in real_data.chunks(2) {
@ -115,7 +114,6 @@ impl PSOCipher for PSOBBCipher {
result.extend_from_slice(&r.to_le_bytes());
}
Ok(result)
}
@ -182,15 +180,14 @@ mod tests {
let mut cipher_out = PSOBBCipher::new(p, s, seed);
for _ in 0..50 {
let len = (rng.gen::<u16>() / 8) * 8;
let len = (rng.gen::<u16>() / 4) * 4;
let mut random_junk = vec![0u8; len as usize];
rng.fill_bytes(&mut random_junk);
let enc_data = cipher_in.encrypt(&random_junk).unwrap();
let orig_data = cipher_out.decrypt(&enc_data).unwrap();
assert!(random_junk == orig_data);
assert!(random_junk == orig_data[..len as usize].to_vec());
}
}
}