cast.go

     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 sha256
     6  
     7  import (
     8  	"bytes"
     9  	"crypto/internal/fips"
    10  	"errors"
    11  )
    12  
    13  func init() {
    14  	fips.CAST("SHA2-256", func() error {
    15  		input := []byte{
    16  			0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
    17  			0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
    18  		}
    19  		want := []byte{
    20  			0x5d, 0xfb, 0xab, 0xee, 0xdf, 0x31, 0x8b, 0xf3,
    21  			0x3c, 0x09, 0x27, 0xc4, 0x3d, 0x76, 0x30, 0xf5,
    22  			0x1b, 0x82, 0xf3, 0x51, 0x74, 0x03, 0x01, 0x35,
    23  			0x4f, 0xa3, 0xd7, 0xfc, 0x51, 0xf0, 0x13, 0x2e,
    24  		}
    25  		h := New()
    26  		h.Write(input)
    27  		if got := h.Sum(nil); !bytes.Equal(got, want) {
    28  			return errors.New("unexpected result")
    29  		}
    30  		return nil
    31  	})
    32  }
    33
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