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 hmac
   6  
   7  import (
   8  	"bytes"
   9  	"crypto/internal/fips140"
  10  	"crypto/internal/fips140/sha256"
  11  	"errors"
  12  )
  13  
  14  func init() {
  15  	fips140.CAST("HMAC-SHA2-256", func() error {
  16  		input := []byte{
  17  			0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
  18  			0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
  19  		}
  20  		want := []byte{
  21  			0xf0, 0x8d, 0x82, 0x8d, 0x4c, 0x9e, 0xad, 0x3d,
  22  			0xdc, 0x12, 0x9c, 0x4e, 0x70, 0xc4, 0x19, 0x2a,
  23  			0x4f, 0x12, 0x73, 0x23, 0x73, 0x77, 0x66, 0x05,
  24  			0x10, 0xee, 0x57, 0x6b, 0x3a, 0xc7, 0x14, 0x41,
  25  		}
  26  		h := New(sha256.New, input)
  27  		h.Write(input)
  28  		h.Write(input)
  29  		if got := h.Sum(nil); !bytes.Equal(got, want) {
  30  			return errors.New("unexpected result")
  31  		}
  32  		return nil
  33  	})
  34  }
  35