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Add SECP256k1/ECDSA support for transaction signing (#3861)

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* Add SECP256k1/ECDSA support for transaction signing.

* Refactoring and fixes

* Fix for contracts

* Avoid breaking runtime host function

* Build fixes, make subkey work more generaically.

* Fix tests

* Dedpulicate a bit of code, remove unneeded code, docs

* Bump runtime version

* Fix a test and clean up some code.

* Derivation can derive seed.

* Whitespace

* Bump runtime again.

* Update core/primitives/src/crypto.rs

Co-Authored-By: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update core/primitives/src/ecdsa.rs

Co-Authored-By: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Fix AppVerify
This commit is contained in:
Gavin Wood
2019-10-24 10:59:09 +02:00
committed by GitHub
parent 62a238a81b
commit d97775542a
30 changed files with 1286 additions and 419 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/core/sr-io/without_std.rs
+24
View File
@@ -394,12 +394,23 @@ pub mod ext {
) -> u32;
/// Note: ext_secp256k1_ecdsa_recover returns 0 if the signature is correct, nonzero otherwise.
///
/// pubkey_data must point to 64 bytes.
fn ext_secp256k1_ecdsa_recover(
msg_data: *const u8,
sig_data: *const u8,
pubkey_data: *mut u8,
) -> u32;
/// Note: ext_secp256k1_ecdsa_recover_compressed returns 0 if the signature is correct, nonzero otherwise.
///
/// pubkey_data must point to 33 bytes.
fn ext_secp256k1_ecdsa_recover_compressed(
msg_data: *const u8,
sig_data: *const u8,
pubkey_data: *mut u8,
) -> u32;
//================================
// Offchain-worker Context
//================================
@@ -971,6 +982,19 @@ impl CryptoApi for () {
_ => unreachable!("`ext_secp256k1_ecdsa_recover` only returns 0, 1, 2 or 3; qed"),
}
}
fn secp256k1_ecdsa_recover_compressed(sig: &[u8; 65], msg: &[u8; 32]) -> Result<[u8; 33], EcdsaVerifyError> {
let mut pubkey = [0u8; 33];
match unsafe {
ext_secp256k1_ecdsa_recover_compressed.get()(msg.as_ptr(), sig.as_ptr(), pubkey.as_mut_ptr())
} {
0 => Ok(pubkey),
1 => Err(EcdsaVerifyError::BadRS),
2 => Err(EcdsaVerifyError::BadV),
3 => Err(EcdsaVerifyError::BadSignature),
_ => unreachable!("`ext_secp256k1_ecdsa_recover_compressed` only returns 0, 1, 2 or 3; qed"),
}
}
}
impl OffchainApi for () {