diff options
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/curve.go | 65 |
1 files changed, 38 insertions, 27 deletions
diff --git a/crypto/curve.go b/crypto/curve.go index e07a06071..841766a30 100644 --- a/crypto/curve.go +++ b/crypto/curve.go @@ -1,36 +1,36 @@ -// Copyright 2014 The go-ethereum Authors -// This file is part of go-ethereum. +// Copyright 2010 The Go Authors. All rights reserved. +// Copyright 2011 ThePiachu. All rights reserved. // -// go-ethereum is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: // -// go-ethereum is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// * The name of ThePiachu may not be used to endorse or promote products +// derived from this software without specific prior written permission. // -// You should have received a copy of the GNU Lesser General Public License -// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>. +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. package crypto -// Copyright 2010 The Go Authors. All rights reserved. -// Copyright 2011 ThePiachu. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package bitelliptic implements several Koblitz elliptic curves over prime -// fields. - -// This package operates, internally, on Jacobian coordinates. For a given -// (x, y) position on the curve, the Jacobian coordinates are (x1, y1, z1) -// where x = x1/z1² and y = y1/z1³. The greatest speedups come when the whole -// calculation can be performed within the transform (as in ScalarMult and -// ScalarBaseMult). But even for Add and Double, it's faster to apply and -// reverse the transform than to operate in affine coordinates. - import ( "crypto/elliptic" "io" @@ -38,6 +38,17 @@ import ( "sync" ) +// This code is from https://github.com/ThePiachu/GoBit and implements +// several Koblitz elliptic curves over prime fields. +// +// The curve methods, internally, on Jacobian coordinates. For a given +// (x, y) position on the curve, the Jacobian coordinates are (x1, y1, +// z1) where x = x1/z1² and y = y1/z1³. The greatest speedups come +// when the whole calculation can be performed within the transform +// (as in ScalarMult and ScalarBaseMult). But even for Add and Double, +// it's faster to apply and reverse the transform than to operate in +// affine coordinates. + // A BitCurve represents a Koblitz Curve with a=0. // See http://www.hyperelliptic.org/EFD/g1p/auto-shortw.html type BitCurve struct { |