cast.mx raw

   1  // Copyright 2024 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 hkdf
   6  
   7  import (
   8  	"bytes"
   9  	"crypto/internal/fips140"
  10  	_ "crypto/internal/fips140/check"
  11  	"crypto/internal/fips140/sha256"
  12  	"errors"
  13  )
  14  
  15  func init() {
  16  	fips140.CAST("HKDF-SHA2-256", func() error {
  17  		input := []byte{
  18  			0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
  19  			0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
  20  		}
  21  		want := []byte{
  22  			0xb6, 0x53, 0x00, 0x5b, 0x51, 0x6d, 0x2b, 0xc9,
  23  			0x4a, 0xe4, 0xf9, 0x51, 0x73, 0x1f, 0x71, 0x21,
  24  			0xa6, 0xc1, 0xde, 0x42, 0x4f, 0x2c, 0x99, 0x60,
  25  			0x64, 0xdb, 0x66, 0x3e, 0xec, 0xa6, 0x37, 0xff,
  26  		}
  27  		got := Key(sha256.New, input, input, []byte(input), len(want))
  28  		if !bytes.Equal(got, want) {
  29  			return errors.New("unexpected result")
  30  		}
  31  		return nil
  32  	})
  33  }
  34