PowerShell 4.0 新增计算文件hash值的命令：Get-FileHash，非常有用，从此我们计算文件hash再也不用下载什么软件。
不管是微软官方提供的还是第三方的，尤其第三方的谁知道是否植入了木马。
下面来看下通过 get-help get-filehash 获取到的帮助，用法很简单了：
PS C:\Users\Administrator> get-help get-filehash
名称
Get-FileHash
语法
Get-FileHash [-Path] <string[]> [-Algorithm {SHA1 | SHA256 | SHA384 | SHA512 | MACTripleDES | MD5 | RIPEMD
160}] []
Get-FileHash -LiteralPath <string[]> [-Algorithm {SHA1 | SHA256 | SHA384 | SHA512 | MACTripleDES | MD5 | R
IPEMD160}] []
别名
无
备注
Get-Help 无法在此计算机上找到此 cmdlet 的帮助文件。只能显示部分帮助。
-- 若要下载和安装包含此 cmdlet 的模块的帮助文件，请使用 Update-Help。
PS C:\Users\Administrator>
比如我们要获取d盘下cn_win8.1.iso的sha1，我们可以打开powershell，输入如下命令：
Get-FileHash -Path d:\cn_win8.1.iso -Algorithm SHA1
敲回车就会看到cn_win8.1.iso的sha1值了，速度很快，如果文件比较大，稍微等一会就好了。
配合win8强大的复制文件地址功能，任何复杂路径下的文件我们都只需要复制粘贴就可以了，不用自己输入d:\cn_win8.1.iso。
win8如此强大，还是很多人不喜欢我很纳闷，这个技巧稍微提一下吧，方便读者：
我知道的有两种方法，还有其它方法没，没有深入研究，这两个足够用啦：
1.选中文件，点击资源管理器上方 Ribbon 界面中的复制路径即可。
2.选中文件，按住shift键，在选中的文件上点击鼠标右键，点击复制为路径即可。
之后，在powershell中点击鼠标右键，就会自动粘贴了，如果在cmd窗口中就要先点击鼠标右键，再选择粘贴才行。
如果不是powershell 4.0环境的话，可以将如下代码保存为powershell格式的ps1文件，然后通过命令行或者拖拽的方式都可以计算文件的hash值。如果懒得自己建文件，下面我也会提供百度盘的链接，大家可以下载，里面有readme，写的很详细，请先仔细阅读。
注：本脚本不是我写的，是“俺没喝过雄黄酒”在2010年9月6日创作的，我只是转载了。
#region define
[Reflection.Assembly]::LoadWithPartialName("System.Security") | out-null
#write by 俺没喝过雄黄酒
#2010-9-6
#endregion define
#region function
function get-hash-window {
#region Import the Assemblies
[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null
[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null
#endregion
#region Generated Form Objects
[System.Windows.Forms.Application]::EnableVisualStyles()
$sha1 = [System.Security.Cryptography.SHA1]::Create()
$sha256 = [System.Security.Cryptography.SHA256]::Create()
$sha512 = [System.Security.Cryptography.SHA512]::Create()
$md5 = [System.Security.Cryptography.MD5]::Create()
$form1 = New-Object System.Windows.Forms.Form
$richTextBox1 = New-Object System.Windows.Forms.RichTextBox
$button1 = New-Object System.Windows.Forms.Button
$button2 = New-Object System.Windows.Forms.Button
$button3 = New-Object System.Windows.Forms.Button
$button4 = New-Object System.Windows.Forms.Button
$button5 = New-Object System.Windows.Forms.Button
$button6 = New-Object System.Windows.Forms.Button
$openFileDialog1 = New-Object System.Windows.Forms.OpenFileDialog
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
#endregion Generated Form Objects
#----------------------------------------------
#Generated Event Script Blocks
#----------------------------------------------
#Provide Custom Code for events specified in PrimalForms.
$button1_click=
{
$openFileDialog1.ShowDialog()| Out-Null
if ($openFileDialog1.filename -ne "浏览目标文件绝对路径")
{
$script:newfile = 1
$script:myfileobject = New-Object System.IO.FileInfo($openFileDialog1.filename)
}
}
$button2_click=
{
if ($script:newfile -eq 1)
{
$RichTextBox1.text = "计算中，请等待..."
$RichTextBox1.refresh()
$button2.Text = "计算中..."
$button2.Enabled = $False
$button2.refresh()
$button3.Text = "计算中..."
$button3.Enabled = $False
$button3.refresh()
$button4.Text = "计算中..."
$button4.Enabled = $False
$button4.refresh()
$button5.Text = "计算中..."
$button5.Enabled = $False
$button5.refresh()
$Filecontent=$script:myfileobject.OpenRead()
$sha1.ComputeHash($Filecontent) | foreach -Begin{$filesha1hashcode=''} -Process{$filesha1hashcode += "{0:x2}" -f $_} -End{$RichTextBox1.text = $openFileDialog1.filename,"`n",$filesha1hashcode; $RichTextBox1.refresh()}
$Filecontent.Dispose()
$button2.Text = "计算SHA1值"
$button2.Enabled = $True
$button2.refresh()
$button3.Text = "计算SHA256值"
$button3.Enabled = $True
$button3.refresh()
$button4.Text = "计算SHA512值"
$button4.Enabled = $True
$button4.refresh()
$button5.Text = "计算MD5值"
$button5.Enabled = $True
$button5.refresh()
}
else
{
$RichTextBox1.text = "你还没按'打开目标文件'按钮"
$RichTextBox1.refresh()
}
}
$button3_click=
{
if ($script:newfile -eq 1)
{
$RichTextBox1.text = "计算中，请等待..."
$RichTextBox1.refresh()
$button2.Text = "计算中..."
$button2.Enabled = $False
$button2.refresh()
$button3.Text = "计算中..."
$button3.Enabled = $False
$button3.refresh()
$button4.Text = "计算中..."
$button4.Enabled = $False
$button4.refresh()
$button5.Text = "计算中..."
$button5.Enabled = $False
$button5.refresh()
$Filecontent=$script:myfileobject.OpenRead()
$sha256.ComputeHash($Filecontent) | foreach -Begin{$filesha256hashcode=''} -Process{$filesha256hashcode += "{0:x2}" -f $_} -End{$RichTextBox1.text = $openFileDialog1.filename,"`n",$filesha256hashcode; $RichTextBox1.refresh()}
$Filecontent.Dispose()
$button2.Text = "计算SHA1值"
$button2.Enabled = $True
$button2.refresh()
$button3.Text = "计算SHA256值"
$button3.Enabled = $True
$button3.refresh()
$button4.Text = "计算SHA512值"
$button4.Enabled = $True
$button4.refresh()
$button5.Text = "计算MD5值"
$button5.Enabled = $True
$button5.refresh()
}
else
{
$RichTextBox1.text = "你还没按'打开目标文件'按钮"
$RichTextBox1.refresh()
}
}
$button4_click=
{
if ($script:newfile -eq 1)
{
$RichTextBox1.text = "计算中，请等待..."
$RichTextBox1.refresh()
$button2.Text = "计算中..."
$button2.Enabled = $False
$button2.refresh()
$button3.Text = "计算中..."
$button3.Enabled = $False
$button3.refresh()
$button4.Text = "计算中..."
$button4.Enabled = $False
$button4.refresh()
$button5.Text = "计算中..."
$button5.Enabled = $False
$button5.refresh()
$Filecontent=$script:myfileobject.OpenRead()
$sha512.ComputeHash($Filecontent) | foreach -Begin{$filesha512hashcode=''} -Process{$filesha512hashcode += "{0:x2}" -f $_} -End{$RichTextBox1.text = $openFileDialog1.filename,"`n",$filesha512hashcode; $RichTextBox1.refresh()}
$Filecontent.Dispose()
$button2.Text = "计算SHA1值"
$button2.Enabled = $True
$button2.refresh()
$button3.Text = "计算SHA256值"
$button3.Enabled = $True
$button3.refresh()
$button4.Text = "计算SHA512值"
$button4.Enabled = $True
$button4.refresh()
$button5.Text = "计算MD5值"
$button5.Enabled = $True
$button5.refresh()
}
else
{
$RichTextBox1.text = "你还没按'打开目标文件'按钮"
$RichTextBox1.refresh()
}
}
$button5_click=
{
if ($script:newfile -eq 1)
{
$RichTextBox1.text = "计算中，请等待..."
$RichTextBox1.refresh()
$button2.Text = "计算中..."
$button2.Enabled = $False
$button2.refresh()
$button3.Text = "计算中..."
$button3.Enabled = $False
$button3.refresh()
$button4.Text = "计算中..."
$button4.Enabled = $False
$button4.refresh()
$button5.Text = "计算中..."
$button5.Enabled = $False
$button5.refresh()
$Filecontent=$script:myfileobject.OpenRead()
$md5.ComputeHash($Filecontent) | foreach -Begin{$filemd5hashcode=''} -Process{$filemd5hashcode += "{0:x2}" -f $_} -End{$RichTextBox1.text = $openFileDialog1.filename,"`n",$filemd5hashcode; $RichTextBox1.refresh()}
$Filecontent.Dispose()
$button2.Text = "计算SHA1值"
$button2.Enabled = $True
$button2.refresh()
$button3.Text = "计算SHA256值"
$button3.Enabled = $True
$button3.refresh()
$button4.Text = "计算SHA512值"
$button4.Enabled = $True
$button4.refresh()
$button5.Text = "计算MD5值"
$button5.Enabled = $True
$button5.refresh()
}
else
{
$RichTextBox1.text = "你还没按'打开目标文件'按钮"
$RichTextBox1.refresh()
}
}
$button6_click=
{
$RichTextBox1.Selectall()
$RichTextBox1.Copy()
}
$OnLoadForm_StateCorrection=
{#Correct the initial state of the form to prevent the .Net maximized form issue
$form1.WindowState = $InitialFormWindowState
}
#----------------------------------------------
#region Generated Form Code
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 700
$System_Drawing_Size.Height = 200
$form1.ClientSize = $System_Drawing_Size
$form1.Text = "文件 MD5 SHA1 SHA256 SHA512 校验码生成工具 V1.3"
$form1.DataBindings.DefaultDataSourceUpdateMode = 0
$form1.StartPosition = "CenterScreen"
$form1.Name = "form1"
$richTextBox1.Text = "文件 MD5 SHA1 SHA256 SHA512 校验码生成工具 V1.3"
$richTextBox1.BackColor = [System.Drawing.Color]::FromArgb(255,70,130,180)
$richTextBox1.Anchor = 15
$richTextBox1.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 0
$System_Drawing_Point.Y = 34
$richTextBox1.Location = $System_Drawing_Point
$richTextBox1.Name = "richTextBox1"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 701
$System_Drawing_Size.Height = 168
$richTextBox1.ScrollBars = 18
$richTextBox1.Size = $System_Drawing_Size
$richTextBox1.TabIndex = 0
$richTextBox1.Font = New-Object System.Drawing.Font("MS UI Gothic",24,0,3,0)
$form1.Controls.Add($richTextBox1)
$button1.Text = "打开目标文件"
$button1.UseVisualStyleBackColor = $True
$button1.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 0
$System_Drawing_Point.Y = 0
$button1.Location = $System_Drawing_Point
$button1.Name = "button1"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 120
$System_Drawing_Size.Height = 25
$button1.Size = $System_Drawing_Size
$button1.TabIndex = 1
$button1.add_Click($button1_click)
$form1.Controls.Add($button1)
$button2.Text = "计算SHA1值"
$button2.UseVisualStyleBackColor = $True
$button2.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 120
$System_Drawing_Point.Y = 0
$button2.Location = $System_Drawing_Point
$button2.Name = "button2"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 80
$System_Drawing_Size.Height = 25
$button2.Size = $System_Drawing_Size
$button2.TabIndex = 2
$button2.add_Click($button2_click)
$form1.Controls.Add($button2)
$button3.Text = "计算SHA256值"
$button3.UseVisualStyleBackColor = $True
$button3.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 200
$System_Drawing_Point.Y = 0
$button3.Location = $System_Drawing_Point
$button3.Name = "button3"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 80
$System_Drawing_Size.Height = 25
$button3.Size = $System_Drawing_Size
$button3.TabIndex = 3
$button3.add_Click($button3_click)
$form1.Controls.Add($button3)
$button4.Text = "计算SHA512值"
$button4.UseVisualStyleBackColor = $True
$button4.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 280
$System_Drawing_Point.Y = 0
$button4.Location = $System_Drawing_Point
$button4.Name = "button4"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 80
$System_Drawing_Size.Height = 25
$button4.Size = $System_Drawing_Size
$button4.TabIndex = 4
$button4.add_Click($button4_click)
$form1.Controls.Add($button4)
$button5.Text = "计算MD5值"
$button5.UseVisualStyleBackColor = $True
$button5.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 360
$System_Drawing_Point.Y = 0
$button5.Location = $System_Drawing_Point
$button5.Name = "button5"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 80
$System_Drawing_Size.Height = 25
$button5.Size = $System_Drawing_Size
$button5.TabIndex = 5
$button5.add_Click($button5_click)
$form1.Controls.Add($button5)
$button6.Text = "结果复制到剪贴板"
$button6.UseVisualStyleBackColor = $True
$button6.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 440
$System_Drawing_Point.Y = 0
$button6.Location = $System_Drawing_Point
$button6.Name = "button6"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 120
$System_Drawing_Size.Height = 25
$button6.Size = $System_Drawing_Size
$button6.TabIndex = 6
$button6.add_Click($button6_click)
$form1.Controls.Add($button6)
$openFileDialog1.FileName = "浏览目标文件绝对路径"
$openFileDialog1.InitialDirectory = "Application.StartupPath"
$openFileDialog1.ShowHelp = $True
#endregion Generated Form Code
#Save the initial state of the form
$InitialFormWindowState = $form1.WindowState
#Init the OnLoad event to correct the initial state of the form
$form1.add_Load($OnLoadForm_StateCorrection)
#Show the Form
$form1.ShowDialog()| Out-Null
}
function get-hash-md5 {
$md5 = [System.Security.Cryptography.MD5]::Create()
$script:myfileobject = New-Object System.IO.FileInfo($script:filename)
$Filecontent=$script:myfileobject.OpenRead()
$md5.ComputeHash($Filecontent) | foreach -Begin{$filemd5hashcode=''} -Process{$filemd5hashcode += "{0:x2}" -f $_} -End{write-host $script:filename `n$filemd5hashcode}
$Filecontent.Dispose()
}
function get-hash-sha1 {
$sha1 = [System.Security.Cryptography.SHA1]::Create()
$script:myfileobject = New-Object System.IO.FileInfo($script:filename)
$Filecontent=$script:myfileobject.OpenRead()
$sha1.ComputeHash($Filecontent) | foreach -Begin{$filesha1hashcode=''} -Process{$filesha1hashcode += "{0:x2}" -f $_} -End{write-host $script:filename `n$filesha1hashcode}
$Filecontent.Dispose()
}
function get-hash-sha256 {
$sha1 = [System.Security.Cryptography.SHA256]::Create()
$script:myfileobject = New-Object System.IO.FileInfo($script:filename)
$Filecontent=$script:myfileobject.OpenRead()
$sha1.ComputeHash($Filecontent) | foreach -Begin{$filesha1hashcode=''} -Process{$filesha1hashcode += "{0:x2}" -f $_} -End{write-host $script:filename `n$filesha1hashcode}
$Filecontent.Dispose()
}
function get-hash-sha512 {
$sha1 = [System.Security.Cryptography.SHA512]::Create()
$script:myfileobject = New-Object System.IO.FileInfo($script:filename)
$Filecontent=$script:myfileobject.OpenRead()
$sha1.ComputeHash($Filecontent) | foreach -Begin{$filesha1hashcode=''} -Process{$filesha1hashcode += "{0:x2}" -f $_} -End{write-host $script:filename `n$filesha1hashcode}
$Filecontent.Dispose()
}
#endregion
#region main
if (!$args)
{ get-hash-window }
else
{
Write-Host `n"文件md5,sha1,sha256,sha512校验码生成工具 V1.3"`n
if (!$args[1])
{"第二个参数输入错误：你没输入要校验的文件"}
else
{
if ($script:filename=Resolve-Path $args[1])
{
if ($args[0] -eq "-sha1")
{get-hash-sha1}
elseif ($args[0] -eq "-sha256")
{get-hash-sha256}
elseif ($args[0] -eq "-sha512")
{get-hash-sha512}
elseif ($args[0] -eq "-md5")
{get-hash-md5}
else
{ echo "第一个参数输入错误：参数应该是 '-sha1', '-sha256','-sha512','-md5'" }
}
else
{throw "第二个参数输入错误：找不到这个文件 $args[1]" }
}
}
#endregion
如果连powershell都不支持的系统的话，比如win xp，那么需要下载安装 KB968930 这个补丁就可以啦，也就是这个文件：WindowsXP-KB968930-x86-CHS.exe，可以自己去微软官方下载，也可以在下面的百度盘链接中下载。
百度盘下载链接：文件_MD5_SHA1_SHA256_SHA512_校验码生成工具V1.3
另外本站这篇文章你可能感兴趣：微软出品：MD5和SHA1值验证命令行工具
《PowerShell 4.0 新增计算文件hash值的命令：Get-FileHash》有一个想法
评论已关闭。