github.com/neatlab/neatio@v1.7.3-0.20220425043230-d903e92fcc75/utilities/crypto/sha3/xor_generic.go (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package sha3
     6  
     7  import "encoding/binary"
     8  
     9  // xorInGeneric xors the bytes in buf into the state; it
    10  // makes no non-portable assumptions about memory layout
    11  // or alignment.
    12  func xorInGeneric(d *state, buf []byte) {
    13  	n := len(buf) / 8
    14  
    15  	for i := 0; i < n; i++ {
    16  		a := binary.LittleEndian.Uint64(buf)
    17  		d.a[i] ^= a
    18  		buf = buf[8:]
    19  	}
    20  }
    21  
    22  // copyOutGeneric copies ulint64s to a byte buffer.
    23  func copyOutGeneric(d *state, b []byte) {
    24  	for i := 0; len(b) >= 8; i++ {
    25  		binary.LittleEndian.PutUint64(b, d.a[i])
    26  		b = b[8:]
    27  	}
    28  }