Algorithm used to sign transcations

kss-espeo · 27 November 2019 10:59

Hi. Which algorithm does Cardano use to sign transactions? According to this: https://cardanolaunch.com/assets/Ed25519_BIP.pdf it’s an implementation of ed25519 specifically aligned to BIP32. However here: https://github.com/input-output-hk/cardano-crypto/tree/master/cbits/ed25519 apart from ed25519 implementation, a curve25519 one can be found as well. I’d imagine it might be used just as a part of Cardano ed25519 implementation, but can’t be sure without knowing the codebase.

Can some Cardano dev please clear the confusion here? Just pointing me to a piece of code that does the signing would be nice too

SebastienGllmt · 27 November 2019 11:32

github.com

input-output-hk/chain-libs/blob/master/chain-crypto/src/algorithms/ed25519_derive.rs

use crate::key::{
    AsymmetricKey, AsymmetricPublicKey, PublicKeyError, SecretKeyError, SecretKeySizeStatic,
};
use crate::sign::{SignatureError, SigningAlgorithm, Verification, VerificationAlgorithm};

use ed25519_bip32 as i;
use ed25519_bip32::{XPrv, XPub, XPRV_SIZE, XPUB_SIZE};
use rand_core::{CryptoRng, RngCore};

/// Ed25519 BIP32 Signature algorithm
pub struct Ed25519Bip32;

impl From<i::PrivateKeyError> for SecretKeyError {
    fn from(v: i::PrivateKeyError) -> Self {
        match v {
            i::PrivateKeyError::HighestBitsInvalid => SecretKeyError::StructureInvalid,
            i::PrivateKeyError::LowestBitsInvalid => SecretKeyError::StructureInvalid,
            i::PrivateKeyError::LengthInvalid(_) => SecretKeyError::SizeInvalid,
        }
    }

This file has been truncated. show original

Topic		Replies	Views
Message Signing specification CIPs	8	2958	18 December 2022
How to directly sign a Cardano transaction? Misc Dev Talk	8	2303	11 April 2021
Using @emurgo/cardano-serialization-lib-nodejs for creating and signing transaction Misc Dev Talk	6	1768	24 December 2021
Building transaction using Cardano Serialization Lib Cardano Integration	1	639	25 October 2024
How to verify signed data? Cardano Integration address-type , transactions	8	1907	15 December 2022

Algorithm used to sign transcations

Related topics