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82 lines
2.6 KiB
82 lines
2.6 KiB
// Copyright (c) 2013-2014 The btcsuite developers |
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// Use of this source code is governed by an ISC |
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// license that can be found in the LICENSE file. |
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package btcec |
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import ( |
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"math/big" |
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) |
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const ( |
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TstPubkeyUncompressed = pubkeyUncompressed |
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TstPubkeyCompressed = pubkeyCompressed |
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TstPubkeyHybrid = pubkeyHybrid |
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) |
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// TstRawInts allows the test package to get the integers from the internal |
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// field representation for ensuring correctness. It is only available during |
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// the tests. |
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func (f *fieldVal) TstRawInts() [10]uint32 { |
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return f.n |
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} |
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// TstSetRawInts allows the test package to directly set the integers used by |
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// the internal field representation. It is only available during the tests. |
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func (f *fieldVal) TstSetRawInts(raw [10]uint32) *fieldVal { |
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for i := 0; i < len(raw); i++ { |
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f.n[i] = raw[i] |
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} |
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return f |
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} |
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// TstFieldJacobianToBigAffine makes the internal fieldJacobianToBigAffine |
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// function available to the test package. |
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func (curve *KoblitzCurve) TstFieldJacobianToBigAffine(x, y, z *fieldVal) (*big.Int, *big.Int) { |
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return curve.fieldJacobianToBigAffine(x, y, z) |
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} |
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// TstIsJacobianOnCurve returns boolean if the point (x,y,z) is on the curve. |
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func (curve *KoblitzCurve) TstIsJacobianOnCurve(x, y, z *fieldVal) bool { |
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// Elliptic curve equation for secp256k1 is: y^2 = x^3 + 7 |
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// In Jacobian coordinates, Y = y/z^3 and X = x/z^2 |
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// Thus: |
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// (y/z^3)^2 = (x/z^2)^3 + 7 |
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// y^2/z^6 = x^3/z^6 + 7 |
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// y^2 = x^3 + 7*z^6 |
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var y2, z2, x3, result fieldVal |
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y2.SquareVal(y).Normalize() |
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z2.SquareVal(z) |
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x3.SquareVal(x).Mul(x) |
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result.SquareVal(&z2).Mul(&z2).MulInt(7).Add(&x3).Normalize() |
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return y2.Equals(&result) |
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} |
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// TstAddJacobian makes the internal addJacobian function available to the test |
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// package. |
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func (curve *KoblitzCurve) TstAddJacobian(x1, y1, z1, x2, y2, z2, x3, y3, z3 *fieldVal) { |
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curve.addJacobian(x1, y1, z1, x2, y2, z2, x3, y3, z3) |
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} |
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// TstDoubleJacobian makes the internal doubleJacobian function available to the test |
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// package. |
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func (curve *KoblitzCurve) TstDoubleJacobian(x1, y1, z1, x3, y3, z3 *fieldVal) { |
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curve.doubleJacobian(x1, y1, z1, x3, y3, z3) |
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} |
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// NewFieldVal returns a new field value set to 0. This is only available to |
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// the test package. |
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func NewFieldVal() *fieldVal { |
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return new(fieldVal) |
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} |
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// TstNonceRFC6979 makes the nonceRFC6979 function available to the test package. |
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func TstNonceRFC6979(privkey *big.Int, hash []byte) *big.Int { |
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return nonceRFC6979(privkey, hash) |
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} |
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// TstRemovePKCSPadding makes the internal removePKCSPadding function available |
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// to the test package. |
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func TstRemovePKCSPadding(src []byte) ([]byte, error) { |
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return removePKCSPadding(src) |
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}
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