libgo/go/hash/marshal_test.go

   1 // Copyright 2017 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 // Test that the hashes in the standard library implement
   6 // BinaryMarshaler, BinaryUnmarshaler,
   7 // and lock in the current representations.
   8
   9 package hash_test
  10
  11 import (
  12         "bytes"
  13         "crypto/md5"
  14         "crypto/sha1"
  15         "crypto/sha256"
  16         "crypto/sha512"
  17         "encoding"
  18         "encoding/hex"
  19         "hash"
  20         "hash/adler32"
  21         "hash/crc32"
  22         "hash/crc64"
  23         "hash/fnv"
  24         "testing"
  25 )
  26
  27 func fromHex(s string) []byte {
  28         b, err := hex.DecodeString(s)
  29         if err != nil {
  30                 panic(err)
  31         }
  32         return b
  33 }
  34
  35 var marshalTests = []struct {
  36         name   string
  37         new    func() hash.Hash
  38         golden []byte
  39 }{
  40         {"adler32", func() hash.Hash { return adler32.New() }, fromHex("61646c01460a789d")},
  41         {"crc32", func() hash.Hash { return crc32.NewIEEE() }, fromHex("63726301ca87914dc956d3e8")},
  42         {"crc64", func() hash.Hash { return crc64.New(crc64.MakeTable(crc64.ISO)) }, fromHex("6372630273ba8484bbcd5def5d51c83c581695be")},
  43         {"fnv32", func() hash.Hash { return fnv.New32() }, fromHex("666e760171ba3d77")},
  44         {"fnv32a", func() hash.Hash { return fnv.New32a() }, fromHex("666e76027439f86f")},
  45         {"fnv64", func() hash.Hash { return fnv.New64() }, fromHex("666e7603cc64e0e97692c637")},
  46         {"fnv64a", func() hash.Hash { return fnv.New64a() }, fromHex("666e7604c522af9b0dede66f")},
  47         {"fnv128", func() hash.Hash { return fnv.New128() }, fromHex("666e760561587a70a0f66d7981dc980e2cabbaf7")},
  48         {"fnv128a", func() hash.Hash { return fnv.New128a() }, fromHex("666e7606a955802b0136cb67622b461d9f91e6ff")},
  49         {"md5", md5.New, fromHex("6d643501a91b0023007aa14740a3979210b5f024c0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f80000000000000000000000000000f9")},
  50         {"sha1", sha1.New, fromHex("736861016dad5acb4dc003952f7a0b352ee5537ec381a228c0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f80000000000000000000000000000f9")},
  51         {"sha224", sha256.New224, fromHex("73686102f8b92fc047c9b4d82f01a6370841277b7a0d92108440178c83db855a8e66c2d9c0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f80000000000000000000000000000f9")},
  52         {"sha256", sha256.New, fromHex("736861032bed68b99987cae48183b2b049d393d0050868e4e8ba3730e9112b08765929b7c0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f80000000000000000000000000000f9")},
  53         {"sha384", sha512.New384, fromHex("736861046f1664d213dd802f7c47bc50637cf93592570a2b8695839148bf38341c6eacd05326452ef1cbe64d90f1ef73bb5ac7d2803565467d0ddb10c5ee3fc050f9f0c1808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9fa0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f80000000000000000000000000000f9")},
  54         {"sha512_224", sha512.New512_224, fromHex("736861056f1a450ec15af20572d0d1ee6518104d7cbbbe79a038557af5450ed7dbd420b53b7335209e951b4d9aff401f90549b9604fa3d823fbb8581c73582a88aa84022808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9fa0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f80000000000000000000000000000f9")},
  55         {"sha512_256", sha512.New512_256, fromHex("736861067c541f1d1a72536b1f5dad64026bcc7c508f8a2126b51f46f8b9bff63a26fee70980718031e96832e95547f4fe76160ff84076db53b4549b86354af8e17b5116808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9fa0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f80000000000000000000000000000f9")},
  56         {"sha512", sha512.New, fromHex("736861078e03953cd57cd6879321270afa70c5827bb5b69be59a8f0130147e94f2aedf7bdc01c56c92343ca8bd837bb7f0208f5a23e155694516b6f147099d491a30b151808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9fa0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebfc0c1c2c3c4c5c6c7c8c9cacbcccdcecfd0d1d2d3d4d5d6d7d8d9dadbdcdddedfe0e1e2e3e4e5e6e7e8e9eaebecedeeeff0f1f2f3f4f5f6f7f80000000000000000000000000000f9")},
  57 }
  58
  59 func TestMarshalHash(t *testing.T) {
  60         for _, tt := range marshalTests {
  61                 t.Run(tt.name, func(t *testing.T) {
  62                         buf := make([]byte, 256)
  63                         for i := range buf {
  64                                 buf[i] = byte(i)
  65                         }
  66
  67                         h := tt.new()
  68                         h.Write(buf[:256])
  69                         sum := h.Sum(nil)
  70
  71                         h2 := tt.new()
  72                         h3 := tt.new()
  73                         const split = 249
  74                         for i := 0; i < split; i++ {
  75                                 h2.Write(buf[i : i+1])
  76                         }
  77                         h2m, ok := h2.(encoding.BinaryMarshaler)
  78                         if !ok {
  79                                 t.Fatalf("Hash does not implement MarshalBinary")
  80                         }
  81                         enc, err := h2m.MarshalBinary()
  82                         if err != nil {
  83                                 t.Fatalf("MarshalBinary: %v", err)
  84                         }
  85                         if !bytes.Equal(enc, tt.golden) {
  86                                 t.Errorf("MarshalBinary = %x, want %x", enc, tt.golden)
  87                         }
  88                         h3u, ok := h3.(encoding.BinaryUnmarshaler)
  89                         if !ok {
  90                                 t.Fatalf("Hash does not implement UnmarshalBinary")
  91                         }
  92                         if err := h3u.UnmarshalBinary(enc); err != nil {
  93                                 t.Fatalf("UnmarshalBinary: %v", err)
  94                         }
  95                         h2.Write(buf[split:])
  96                         h3.Write(buf[split:])
  97                         sum2 := h2.Sum(nil)
  98                         sum3 := h3.Sum(nil)
  99                         if !bytes.Equal(sum2, sum) {
 100                                 t.Fatalf("Sum after MarshalBinary = %x, want %x", sum2, sum)
 101                         }
 102                         if !bytes.Equal(sum3, sum) {
 103                                 t.Fatalf("Sum after UnmarshalBinary = %x, want %x", sum3, sum)
 104                         }
 105                 })
 106         }
 107 }