github.com/muesli/go@v0.0.0-20170208044820-e410d2a81ef2/src/crypto/md5/md5_test.go (about)

     1  // Copyright 2009 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 md5
     6  
     7  import (
     8  	"crypto/rand"
     9  	"fmt"
    10  	"io"
    11  	"testing"
    12  	"unsafe"
    13  )
    14  
    15  type md5Test struct {
    16  	out string
    17  	in  string
    18  }
    19  
    20  var golden = []md5Test{
    21  	{"d41d8cd98f00b204e9800998ecf8427e", ""},
    22  	{"0cc175b9c0f1b6a831c399e269772661", "a"},
    23  	{"187ef4436122d1cc2f40dc2b92f0eba0", "ab"},
    24  	{"900150983cd24fb0d6963f7d28e17f72", "abc"},
    25  	{"e2fc714c4727ee9395f324cd2e7f331f", "abcd"},
    26  	{"ab56b4d92b40713acc5af89985d4b786", "abcde"},
    27  	{"e80b5017098950fc58aad83c8c14978e", "abcdef"},
    28  	{"7ac66c0f148de9519b8bd264312c4d64", "abcdefg"},
    29  	{"e8dc4081b13434b45189a720b77b6818", "abcdefgh"},
    30  	{"8aa99b1f439ff71293e95357bac6fd94", "abcdefghi"},
    31  	{"a925576942e94b2ef57a066101b48876", "abcdefghij"},
    32  	{"d747fc1719c7eacb84058196cfe56d57", "Discard medicine more than two years old."},
    33  	{"bff2dcb37ef3a44ba43ab144768ca837", "He who has a shady past knows that nice guys finish last."},
    34  	{"0441015ecb54a7342d017ed1bcfdbea5", "I wouldn't marry him with a ten foot pole."},
    35  	{"9e3cac8e9e9757a60c3ea391130d3689", "Free! Free!/A trip/to Mars/for 900/empty jars/Burma Shave"},
    36  	{"a0f04459b031f916a59a35cc482dc039", "The days of the digital watch are numbered.  -Tom Stoppard"},
    37  	{"e7a48e0fe884faf31475d2a04b1362cc", "Nepal premier won't resign."},
    38  	{"637d2fe925c07c113800509964fb0e06", "For every action there is an equal and opposite government program."},
    39  	{"834a8d18d5c6562119cf4c7f5086cb71", "His money is twice tainted: 'taint yours and 'taint mine."},
    40  	{"de3a4d2fd6c73ec2db2abad23b444281", "There is no reason for any individual to have a computer in their home. -Ken Olsen, 1977"},
    41  	{"acf203f997e2cf74ea3aff86985aefaf", "It's a tiny change to the code and not completely disgusting. - Bob Manchek"},
    42  	{"e1c1384cb4d2221dfdd7c795a4222c9a", "size:  a.out:  bad magic"},
    43  	{"c90f3ddecc54f34228c063d7525bf644", "The major problem is with sendmail.  -Mark Horton"},
    44  	{"cdf7ab6c1fd49bd9933c43f3ea5af185", "Give me a rock, paper and scissors and I will move the world.  CCFestoon"},
    45  	{"83bc85234942fc883c063cbd7f0ad5d0", "If the enemy is within range, then so are you."},
    46  	{"277cbe255686b48dd7e8f389394d9299", "It's well we cannot hear the screams/That we create in others' dreams."},
    47  	{"fd3fb0a7ffb8af16603f3d3af98f8e1f", "You remind me of a TV show, but that's all right: I watch it anyway."},
    48  	{"469b13a78ebf297ecda64d4723655154", "C is as portable as Stonehedge!!"},
    49  	{"63eb3a2f466410104731c4b037600110", "Even if I could be Shakespeare, I think I should still choose to be Faraday. - A. Huxley"},
    50  	{"72c2ed7592debca1c90fc0100f931a2f", "The fugacity of a constituent in a mixture of gases at a given temperature is proportional to its mole fraction.  Lewis-Randall Rule"},
    51  	{"132f7619d33b523b1d9e5bd8e0928355", "How can you write a big system without C++?  -Paul Glick"},
    52  }
    53  
    54  func TestGolden(t *testing.T) {
    55  	for i := 0; i < len(golden); i++ {
    56  		g := golden[i]
    57  		s := fmt.Sprintf("%x", Sum([]byte(g.in)))
    58  		if s != g.out {
    59  			t.Fatalf("Sum function: md5(%s) = %s want %s", g.in, s, g.out)
    60  		}
    61  		c := New()
    62  		buf := make([]byte, len(g.in)+4)
    63  		for j := 0; j < 3+4; j++ {
    64  			if j < 2 {
    65  				io.WriteString(c, g.in)
    66  			} else if j == 2 {
    67  				io.WriteString(c, g.in[0:len(g.in)/2])
    68  				c.Sum(nil)
    69  				io.WriteString(c, g.in[len(g.in)/2:])
    70  			} else if j > 2 {
    71  				// test unaligned write
    72  				buf = buf[1:]
    73  				copy(buf, g.in)
    74  				c.Write(buf[:len(g.in)])
    75  			}
    76  			s := fmt.Sprintf("%x", c.Sum(nil))
    77  			if s != g.out {
    78  				t.Fatalf("md5[%d](%s) = %s want %s", j, g.in, s, g.out)
    79  			}
    80  			c.Reset()
    81  		}
    82  	}
    83  }
    84  
    85  func TestLarge(t *testing.T) {
    86  	const N = 10000
    87  	ok := "2bb571599a4180e1d542f76904adc3df" // md5sum of "0123456789" * 1000
    88  	block := make([]byte, 10004)
    89  	c := New()
    90  	for offset := 0; offset < 4; offset++ {
    91  		for i := 0; i < N; i++ {
    92  			block[offset+i] = '0' + byte(i%10)
    93  		}
    94  		for blockSize := 10; blockSize <= N; blockSize *= 10 {
    95  			blocks := N / blockSize
    96  			b := block[offset : offset+blockSize]
    97  			c.Reset()
    98  			for i := 0; i < blocks; i++ {
    99  				c.Write(b)
   100  			}
   101  			s := fmt.Sprintf("%x", c.Sum(nil))
   102  			if s != ok {
   103  				t.Fatalf("md5 TestLarge offset=%d, blockSize=%d = %s want %s", offset, blockSize, s, ok)
   104  			}
   105  		}
   106  	}
   107  }
   108  
   109  // Tests that blockGeneric (pure Go) and block (in assembly for amd64, 386, arm) match.
   110  func TestBlockGeneric(t *testing.T) {
   111  	gen, asm := New().(*digest), New().(*digest)
   112  	buf := make([]byte, BlockSize*20) // arbitrary factor
   113  	rand.Read(buf)
   114  	blockGeneric(gen, buf)
   115  	block(asm, buf)
   116  	if *gen != *asm {
   117  		t.Error("block and blockGeneric resulted in different states")
   118  	}
   119  }
   120  
   121  var bench = New()
   122  var buf = make([]byte, 8192+1)
   123  var sum = make([]byte, bench.Size())
   124  
   125  func benchmarkSize(b *testing.B, size int, unaligned bool) {
   126  	b.SetBytes(int64(size))
   127  	buf := buf
   128  	if unaligned {
   129  		if uintptr(unsafe.Pointer(&buf[0]))&(unsafe.Alignof(uint32(0))-1) == 0 {
   130  			buf = buf[1:]
   131  		}
   132  	}
   133  	b.ResetTimer()
   134  	for i := 0; i < b.N; i++ {
   135  		bench.Reset()
   136  		bench.Write(buf[:size])
   137  		bench.Sum(sum[:0])
   138  	}
   139  }
   140  
   141  func BenchmarkHash8Bytes(b *testing.B) {
   142  	benchmarkSize(b, 8, false)
   143  }
   144  
   145  func BenchmarkHash1K(b *testing.B) {
   146  	benchmarkSize(b, 1024, false)
   147  }
   148  
   149  func BenchmarkHash8K(b *testing.B) {
   150  	benchmarkSize(b, 8192, false)
   151  }
   152  
   153  func BenchmarkHash8BytesUnaligned(b *testing.B) {
   154  	benchmarkSize(b, 8, true)
   155  }
   156  
   157  func BenchmarkHash1KUnaligned(b *testing.B) {
   158  	benchmarkSize(b, 1024, true)
   159  }
   160  
   161  func BenchmarkHash8KUnaligned(b *testing.B) {
   162  	benchmarkSize(b, 8192, true)
   163  }