Commit Graph

23 Commits

Author SHA1 Message Date
Felix Lange 1a32bdf92c
crypto: fix error check in toECDSA (#15632)
With this change,

    key, err := crypto.HexToECDSA("000000...")
    
returns nil key and an error instead of a non-nil key with nil X
and Y inside. Issue found by @guidovranken.
2017-12-11 22:49:09 +01:00
Felix Lange e85b68ef53
crypto: add DecompressPubkey, VerifySignature (#15615)
We need those operations for p2p/enr.

Also upgrade github.com/btcsuite/btcd/btcec to the latest version
and improve BenchmarkSha3. The benchmark printed extra output 
that confused tools like benchstat and ignored N.
2017-12-06 16:07:08 +01:00
Péter Szilágyi 72dd51e25a
accounts/keystore, crypto: don't enforce key checks on existing keyfiles 2017-06-01 11:11:06 +03:00
Felix Lange 9b0af51386 crypto: add btcec fallback for sign/recover without cgo (#3680)
* vendor: add github.com/btcsuite/btcd/btcec

* crypto: add btcec fallback for sign/recover without cgo

This commit adds a non-cgo fallback implementation of secp256k1
operations.

* crypto, core/vm: remove wrappers for sha256, ripemd160
2017-02-18 09:24:12 +01:00
Felix Lange e0ceeab0d1 crypto/secp256k1: update to github.com/bitcoin-core/secp256k1 @ 9d560f9 (#3544)
- Use defined constants instead of hard-coding their integer value.
- Allocate secp256k1 structs on the C stack instead of converting []byte
- Remove dead code
2017-01-12 21:29:11 +01:00
Felix Lange f2da6581ba all: fix issues reported by honnef.co/go/simple/cmd/gosimple 2017-01-06 18:18:07 +01:00
Péter Szilágyi 08eea0f0e4 accounts, core, crypto, internal: use normalised V during signature handling (#3455)
To address increasing complexity in code that handles signatures, this PR
discards all notion of "different" signature types at the library level. Both
the crypto and accounts package is reduced to only be able to produce plain
canonical secp256k1 signatures. This makes the crpyto APIs much cleaner,
simpler and harder to abuse.
2017-01-05 11:35:23 +01:00
bas-vk b59c8399fb internal/ethapi: add personal_sign and fix eth_sign to hash message (#2940)
This commit includes several API changes:

- The behavior of eth_sign is changed. It now accepts an arbitrary
  message, prepends the well-known string

        \x19Ethereum Signed Message:\n<length of message>

  hashes the result using keccak256 and calculates the signature of
  the hash. This breaks backwards compatability!
  
- personal_sign(hash, address [, password]) is added. It has the same
  semantics as eth_sign but also accepts a password. The private key
  used to sign the hash is temporarily unlocked in the scope of the
  request.
  
- personal_recover(message, signature) is added and returns the
  address for the account that created a signature.
2016-10-28 21:25:49 +02:00
Ricardo Catalinas Jiménez 436fc8d76a all: Rename crypto.Sha3{,Hash}() to crypto.Keccak256{,Hash}()
As we aren't really using the standarized SHA-3
2016-02-21 22:34:34 +00:00
Gustav Simonsson 371871d685 parmas, crypto, core, core/vm: homestead consensus protocol changes
* change gas cost for contract creating txs
* invalidate signature with s value greater than secp256k1 N / 2
* OOG contract creation if not enough gas to store code
* new difficulty adjustment algorithm
* new DELEGATECALL op code
2016-02-18 10:08:11 +01:00
Gustav Simonsson c8ad64f33c crypto, crypto/ecies, crypto/secp256k1: libsecp256k1 scalar mult
thanks to Felix Lange (fjl) for help with design & impl
2015-11-30 13:43:32 +01:00
Gustav Simonsson 3340b56593 crypto: correct sig validation, add more unit tests 2015-09-22 17:33:39 +02:00
Felix Lange bfbcfbe4a9 all: fix license headers one more time
I forgot to update one instance of "go-ethereum" in commit 3f047be5a.
2015-07-23 18:35:11 +02:00
Felix Lange 3f047be5aa all: update license headers to distiguish GPL/LGPL
All code outside of cmd/ is licensed as LGPL. The headers
now reflect this by calling the whole work "the go-ethereum library".
2015-07-22 18:51:45 +02:00
Felix Lange ea54283b30 all: update license information 2015-07-07 14:12:44 +02:00
Felix Lange ad78db4d62 crypto: fix Sha3Hash and add a test for it 2015-03-17 01:32:35 +01:00
obscuren b523441361 Moved ethutil => common 2015-03-16 11:27:38 +01:00
Felix Lange 410b35e913 crypto: make it easier to run Sha3 on multiple inputs
crypto.Sha3(append(foo, bar)) --> crypto.Sha3(foo, bar)
crypto.Sha3([]byte{}) --> crypto.Sha3()
2015-02-06 00:00:36 +01:00
obscuren d4cc2d3503 Pad private key when signing & length check for hashes in sign 2015-01-22 18:12:05 +01:00
obscuren 67f9783e6a Moved `obscuren` secp256k1-go 2015-01-22 00:35:00 +01:00
obscuren bcb1166e52 Added 0 key proof error
Private key \x00\x00...\x00 returns the _exact_ same public key as \x11
\x11...\x11. Currently investigating.
2015-01-19 11:22:56 +01:00
obscuren 35fe4313d5 pre-pow 2015-01-12 10:19:27 +01:00
obscuren fd9da72536 ethcrypto => crypto 2014-10-31 12:37:43 +01:00