1
2
3
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
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