Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Switch to deterministic signatures #77

Open
wants to merge 3 commits into
base: main
Choose a base branch
from
Open

Switch to deterministic signatures #77

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
e1e5fce
Opt for deterministic XEdDSA by using file hash as nonce. The value i…
Jan 19, 2022
75afa38
Remove unused secrets import.
Jan 19, 2022
a0a1189
Merge branch 'main' into deterministic-signatures
Jan 19, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 1 addition & 2 deletions covert/blockstream.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,6 @@
from concurrent.futures import ThreadPoolExecutor
from contextlib import suppress
from hashlib import sha512
from secrets import token_bytes

from nacl.exceptions import CryptoError

Expand Down Expand Up @@ -244,7 +243,7 @@ def encrypt_file(auth, blockinput, a):
a.filehash = blkhash
# Add signature blocks
for key in identities:
signature = xed_sign(key.sk, blkhash, token_bytes(64))
signature = xed_sign(key.sk, blkhash, blkhash) # blkhash is both the message and the nonce
nsig = sha512(blkhash + key.pk).digest()[:12]
ksig = blkhash[:32]
yield chacha.encrypt(signature, None, nsig, ksig)