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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package md5
import (
"crypto/rand"
"fmt"
"io"
"testing"
"unsafe"
)
type md5Test struct {
out string
in string
}
var golden = []md5Test{
{"d41d8cd98f00b204e9800998ecf8427e", ""},
{"0cc175b9c0f1b6a831c399e269772661", "a"},
{"187ef4436122d1cc2f40dc2b92f0eba0", "ab"},
{"900150983cd24fb0d6963f7d28e17f72", "abc"},
{"e2fc714c4727ee9395f324cd2e7f331f", "abcd"},
{"ab56b4d92b40713acc5af89985d4b786", "abcde"},
{"e80b5017098950fc58aad83c8c14978e", "abcdef"},
{"7ac66c0f148de9519b8bd264312c4d64", "abcdefg"},
{"e8dc4081b13434b45189a720b77b6818", "abcdefgh"},
{"8aa99b1f439ff71293e95357bac6fd94", "abcdefghi"},
{"a925576942e94b2ef57a066101b48876", "abcdefghij"},
{"d747fc1719c7eacb84058196cfe56d57", "Discard medicine more than two years old."},
{"bff2dcb37ef3a44ba43ab144768ca837", "He who has a shady past knows that nice guys finish last."},
{"0441015ecb54a7342d017ed1bcfdbea5", "I wouldn't marry him with a ten foot pole."},
{"9e3cac8e9e9757a60c3ea391130d3689", "Free! Free!/A trip/to Mars/for 900/empty jars/Burma Shave"},
{"a0f04459b031f916a59a35cc482dc039", "The days of the digital watch are numbered. -Tom Stoppard"},
{"e7a48e0fe884faf31475d2a04b1362cc", "Nepal premier won't resign."},
{"637d2fe925c07c113800509964fb0e06", "For every action there is an equal and opposite government program."},
{"834a8d18d5c6562119cf4c7f5086cb71", "His money is twice tainted: 'taint yours and 'taint mine."},
{"de3a4d2fd6c73ec2db2abad23b444281", "There is no reason for any individual to have a computer in their home. -Ken Olsen, 1977"},
{"acf203f997e2cf74ea3aff86985aefaf", "It's a tiny change to the code and not completely disgusting. - Bob Manchek"},
{"e1c1384cb4d2221dfdd7c795a4222c9a", "size: a.out: bad magic"},
{"c90f3ddecc54f34228c063d7525bf644", "The major problem is with sendmail. -Mark Horton"},
{"cdf7ab6c1fd49bd9933c43f3ea5af185", "Give me a rock, paper and scissors and I will move the world. CCFestoon"},
{"83bc85234942fc883c063cbd7f0ad5d0", "If the enemy is within range, then so are you."},
{"277cbe255686b48dd7e8f389394d9299", "It's well we cannot hear the screams/That we create in others' dreams."},
{"fd3fb0a7ffb8af16603f3d3af98f8e1f", "You remind me of a TV show, but that's all right: I watch it anyway."},
{"469b13a78ebf297ecda64d4723655154", "C is as portable as Stonehedge!!"},
{"63eb3a2f466410104731c4b037600110", "Even if I could be Shakespeare, I think I should still choose to be Faraday. - A. Huxley"},
{"72c2ed7592debca1c90fc0100f931a2f", "The fugacity of a constituent in a mixture of gases at a given temperature is proportional to its mole fraction. Lewis-Randall Rule"},
{"132f7619d33b523b1d9e5bd8e0928355", "How can you write a big system without C++? -Paul Glick"},
}
func TestGolden(t *testing.T) {
for i := 0; i < len(golden); i++ {
g := golden[i]
s := fmt.Sprintf("%x", Sum([]byte(g.in)))
if s != g.out {
t.Fatalf("Sum function: md5(%s) = %s want %s", g.in, s, g.out)
}
c := New()
buf := make([]byte, len(g.in)+4)
for j := 0; j < 3+4; j++ {
if j < 2 {
io.WriteString(c, g.in)
} else if j == 2 {
io.WriteString(c, g.in[0:len(g.in)/2])
c.Sum(nil)
io.WriteString(c, g.in[len(g.in)/2:])
} else if j > 2 {
// test unaligned write
buf = buf[1:]
copy(buf, g.in)
c.Write(buf[:len(g.in)])
}
s := fmt.Sprintf("%x", c.Sum(nil))
if s != g.out {
t.Fatalf("md5[%d](%s) = %s want %s", j, g.in, s, g.out)
}
c.Reset()
}
}
}
func TestLarge(t *testing.T) {
const N = 10000
ok := "2bb571599a4180e1d542f76904adc3df" // md5sum of "0123456789" * 1000
block := make([]byte, 10004)
c := New()
for offset := 0; offset < 4; offset++ {
for i := 0; i < N; i++ {
block[offset+i] = '0' + byte(i%10)
}
for blockSize := 10; blockSize <= N; blockSize *= 10 {
blocks := N / blockSize
b := block[offset : offset+blockSize]
c.Reset()
for i := 0; i < blocks; i++ {
c.Write(b)
}
s := fmt.Sprintf("%x", c.Sum(nil))
if s != ok {
t.Fatalf("md5 TestLarge offset=%d, blockSize=%d = %s want %s", offset, blockSize, s, ok)
}
}
}
}
// Tests that blockGeneric (pure Go) and block (in assembly for amd64, 386, arm) match.
func TestBlockGeneric(t *testing.T) {
gen, asm := New().(*digest), New().(*digest)
buf := make([]byte, BlockSize*20) // arbitrary factor
rand.Read(buf)
blockGeneric(gen, buf)
block(asm, buf)
if *gen != *asm {
t.Error("block and blockGeneric resulted in different states")
}
}
var bench = New()
var buf = make([]byte, 8192+1)
var sum = make([]byte, bench.Size())
func benchmarkSize(b *testing.B, size int, unaligned bool) {
b.SetBytes(int64(size))
buf := buf
if unaligned {
if uintptr(unsafe.Pointer(&buf[0]))&(unsafe.Alignof(uint32(0))-1) == 0 {
buf = buf[1:]
}
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
bench.Reset()
bench.Write(buf[:size])
bench.Sum(sum[:0])
}
}
func BenchmarkHash8Bytes(b *testing.B) {
benchmarkSize(b, 8, false)
}
func BenchmarkHash1K(b *testing.B) {
benchmarkSize(b, 1024, false)
}
func BenchmarkHash8K(b *testing.B) {
benchmarkSize(b, 8192, false)
}
func BenchmarkHash8BytesUnaligned(b *testing.B) {
benchmarkSize(b, 8, true)
}
func BenchmarkHash1KUnaligned(b *testing.B) {
benchmarkSize(b, 1024, true)
}
func BenchmarkHash8KUnaligned(b *testing.B) {
benchmarkSize(b, 8192, true)
}
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