diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/curve25519/curve25519.go')
| -rw-r--r-- | vendor/golang.org/x/crypto/curve25519/curve25519.go | 23 |
1 files changed, 8 insertions, 15 deletions
diff --git a/vendor/golang.org/x/crypto/curve25519/curve25519.go b/vendor/golang.org/x/crypto/curve25519/curve25519.go index 6918c47fc..2d14c2a78 100644 --- a/vendor/golang.org/x/crypto/curve25519/curve25519.go +++ b/vendor/golang.org/x/crypto/curve25519/curve25519.go @@ -8,6 +8,10 @@ package curve25519 +import ( + "encoding/binary" +) + // This code is a port of the public domain, "ref10" implementation of // curve25519 from SUPERCOP 20130419 by D. J. Bernstein. @@ -50,17 +54,11 @@ func feCopy(dst, src *fieldElement) { // // Preconditions: b in {0,1}. func feCSwap(f, g *fieldElement, b int32) { - var x fieldElement b = -b - for i := range x { - x[i] = b & (f[i] ^ g[i]) - } - for i := range f { - f[i] ^= x[i] - } - for i := range g { - g[i] ^= x[i] + t := b & (f[i] ^ g[i]) + f[i] ^= t + g[i] ^= t } } @@ -75,12 +73,7 @@ func load3(in []byte) int64 { // load4 reads a 32-bit, little-endian value from in. func load4(in []byte) int64 { - var r int64 - r = int64(in[0]) - r |= int64(in[1]) << 8 - r |= int64(in[2]) << 16 - r |= int64(in[3]) << 24 - return r + return int64(binary.LittleEndian.Uint32(in)) } func feFromBytes(dst *fieldElement, src *[32]byte) { |