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crypto: add DecompressPubkey, VerifySignature (#15615)

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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.
This commit is contained in:
Felix Lange
2017-12-06 16:07:08 +01:00
committed by GitHub
parent 6e613cf3de
commit e85b68ef53
14 changed files with 326 additions and 229 deletions
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vendor/github.com/btcsuite/btcd/btcec/README.md generated vendored
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@@ -1,11 +1,9 @@
btcec
=====
[![Build Status](https://travis-ci.org/btcsuite/btcd.png?branch=master)]
(https://travis-ci.org/btcsuite/btcec) [![ISC License]
(http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
[![GoDoc](https://godoc.org/github.com/btcsuite/btcd/btcec?status.png)]
(http://godoc.org/github.com/btcsuite/btcd/btcec)
[![Build Status](https://travis-ci.org/btcsuite/btcd.png?branch=master)](https://travis-ci.org/btcsuite/btcec)
[![ISC License](http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
[![GoDoc](https://godoc.org/github.com/btcsuite/btcd/btcec?status.png)](http://godoc.org/github.com/btcsuite/btcd/btcec)
Package btcec implements elliptic curve cryptography needed for working with
Bitcoin (secp256k1 only for now). It is designed so that it may be used with the
@@ -27,23 +25,19 @@ $ go get -u github.com/btcsuite/btcd/btcec
## Examples
* [Sign Message]
(http://godoc.org/github.com/btcsuite/btcd/btcec#example-package--SignMessage)
* [Sign Message](http://godoc.org/github.com/btcsuite/btcd/btcec#example-package--SignMessage)
Demonstrates signing a message with a secp256k1 private key that is first
parsed form raw bytes and serializing the generated signature.
* [Verify Signature]
(http://godoc.org/github.com/btcsuite/btcd/btcec#example-package--VerifySignature)
* [Verify Signature](http://godoc.org/github.com/btcsuite/btcd/btcec#example-package--VerifySignature)
Demonstrates verifying a secp256k1 signature against a public key that is
first parsed from raw bytes. The signature is also parsed from raw bytes.
* [Encryption]
(http://godoc.org/github.com/btcsuite/btcd/btcec#example-package--EncryptMessage)
* [Encryption](http://godoc.org/github.com/btcsuite/btcd/btcec#example-package--EncryptMessage)
Demonstrates encrypting a message for a public key that is first parsed from
raw bytes, then decrypting it using the corresponding private key.
* [Decryption]
(http://godoc.org/github.com/btcsuite/btcd/btcec#example-package--DecryptMessage)
* [Decryption](http://godoc.org/github.com/btcsuite/btcd/btcec#example-package--DecryptMessage)
Demonstrates decrypting a message using a private key that is first parsed
from raw bytes.