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update vendor keybase/go-crypto (#10234)

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6543 2020-02-11 19:58:23 +01:00 • committed by GitHub
parent 86fdba177a
commit bfd62b6f01
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GPG key ID: 4AEE18F83AFDEB23
29 changed files with 1062 additions and 769 deletions
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27
vendor/github.com/keybase/go-crypto/curve25519/curve_impl.go generated vendored
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@ -16,19 +16,30 @@ func copyReverse(dst []byte, src []byte) {
// Curve 25519 multiplication functions expect scalars in reverse
// order than PGP. To keep the curve25519Curve type consistent
// with other curves, we reverse it here.
for i, j := 0, len(src)-1; j >= 0; i, j = i+1, j-1 {
for i, j := 0, len(src)-1; j >= 0 && i < len(dst); i, j = i+1, j-1 {
dst[i] = src[j]
}
}
func copyTruncate(dst []byte, src []byte) {
lenDst, lenSrc := len(dst), len(src)
if lenDst == lenSrc {
copy(dst, src)
} else if lenDst > lenSrc {
copy(dst[lenDst-lenSrc:lenDst], src)
} else if lenDst < lenSrc {
copy(dst, src[:lenDst])
}
}
func (cv25519Curve) ScalarMult(x1, y1 *big.Int, scalar []byte) (x, y *big.Int) {
// Assume y1 is 0 with cv25519.
var dst [32]byte
var x1Bytes [32]byte
var scalarBytes [32]byte
copy(x1Bytes[:], x1.Bytes()[:32])
copyReverse(scalarBytes[:], scalar[:32])
copyTruncate(x1Bytes[:], x1.Bytes())
copyReverse(scalarBytes[:], scalar)
scalarMult(&dst, &scalarBytes, &x1Bytes)
@ -63,7 +74,7 @@ func (cv25519Curve) MarshalType40(x, y *big.Int) []byte {
ret[0] = 0x40
xBytes := x.Bytes()
copy(ret[1+byteLen-len(xBytes):], xBytes)
copyTruncate(ret[1:], xBytes)
return ret
}
@ -91,10 +102,10 @@ func initCv25519() {
// Some code relies on these parameters being available for
// checking Curve coordinate length. They should not be used
// directly for any calculations.
cv25519.P, _ = new (big.Int).SetString("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffed", 16)
cv25519.N, _ = new (big.Int).SetString("1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed", 16)
cv25519.Gx, _ = new (big.Int).SetString("9", 16)
cv25519.Gy, _ = new (big.Int).SetString("20ae19a1b8a086b4e01edd2c7748d14c923d4d7e6d7c61b229e9c5a27eced3d9", 16)
cv25519.P, _ = new(big.Int).SetString("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffed", 16)
cv25519.N, _ = new(big.Int).SetString("1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed", 16)
cv25519.Gx, _ = new(big.Int).SetString("9", 16)
cv25519.Gy, _ = new(big.Int).SetString("20ae19a1b8a086b4e01edd2c7748d14c923d4d7e6d7c61b229e9c5a27eced3d9", 16)
cv25519.BitSize = 256
}