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feat/refactor: Change gfmul to take references and add field div

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alivecow 2024-11-13 20:27:20 +01:00
parent 11916e29f0
commit a05f2f02b6
4 changed files with 120 additions and 42 deletions
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8
src/utils/ciphers.rs
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@ -340,25 +340,25 @@ pub fn ghash(
eprintln!("Ad chunks before first next {:001X?}", ad_chunks);
let inter1 = xor_bytes(&output, ad_chunks.next().unwrap().to_vec())?;
let mut inter_loop = gfmul(inter1, auth_key_h.clone(), "gcm")?;
let mut inter_loop = gfmul(&inter1, &auth_key_h, "gcm")?;
eprintln!("Ad chunks after first next {:001X?}", ad_chunks);
for chunk in ad_chunks {
eprintln!("Inside ad chunk loop");
eprintln!("Ad chunk in loop {:001X?}", chunk);
let inter2 = xor_bytes(&inter_loop, chunk.to_vec())?;
inter_loop = gfmul(inter2, auth_key_h.clone(), "gcm")?;
inter_loop = gfmul(&inter2, &auth_key_h, "gcm")?;
}
let cipher_chunks = ciphertext.chunks(16);
for chunk in cipher_chunks {
let inter3 = xor_bytes(&inter_loop, chunk.to_vec())?;
inter_loop = gfmul(inter3, auth_key_h.clone(), "gcm")?;
inter_loop = gfmul(&inter3, &auth_key_h, "gcm")?;
}
let inter4 = xor_bytes(&inter_loop, l_field)?;
inter_loop = gfmul(inter4, auth_key_h.clone(), "gcm")?;
inter_loop = gfmul(&inter4, &auth_key_h, "gcm")?;
eprintln!("GHASH auth tag: {:001X?}", inter_loop);