我想计算一些内容的MD5校验和。如何在PowerShell中做到这一点?
当前回答
这将返回远程计算机上文件的MD5哈希值:
Invoke-Command -ComputerName RemoteComputerName -ScriptBlock {
$fullPath = Resolve-Path 'c:\Program Files\Internet Explorer\iexplore.exe'
$md5 = new-object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider
$file = [System.IO.File]::OpenRead($fullPath)
$hash = [System.BitConverter]::ToString($md5.ComputeHash($file))
$hash -replace "-", ""
$file.Dispose()
}
其他回答
如果你正在使用PowerShell社区扩展,有一个Get-Hash命令可以很容易地做到这一点:
C:\PS> "hello world" | Get-Hash -Algorithm MD5
Algorithm: MD5
Path :
HashString : E42B054623B3799CB71F0883900F2764
右击菜单选项示例:
[HKEY_CLASSES_ROOT\*\shell\SHA1 PS check\command]
@="C:\\Windows\\system32\\WindowsPowerShell\\v1.0\\powershell.exe -NoExit -Command Get-FileHash -Algorithm SHA1 '%1'"
下面是一个尝试验证SHA256指纹的漂亮打印示例。我使用PowerShell v4下载了gpg4win v3.0.3(需要Get-FileHash)。
从https://www.gpg4win.org/download.html下载包,打开PowerShell,从下载页面抓取散列,然后运行:
cd ${env:USERPROFILE}\Downloads
$file = "gpg4win-3.0.3.exe"
# Set $hash to the hash reference from the download page:
$hash = "477f56212ee60cc74e0c5e5cc526cec52a069abff485c89c2d57d1b4b6a54971"
# If you have an MD5 hash: # $hashAlgo="MD5"
$hashAlgo = "SHA256"
$computed_hash = (Get-FileHash -Algorithm $hashAlgo $file).Hash.ToUpper()
if ($computed_hash.CompareTo($hash.ToUpper()) -eq 0 ) {
Write-Output "Hash matches for file $file"
}
else {
Write-Output ("Hash DOES NOT match for file {0}: `nOriginal hash: {1} `nComputed hash: {2}" -f ($file, $hash.ToUpper(), $computed_hash))
}
输出:
Hash matches for file gpg4win-3.0.3.exe
这将返回远程计算机上文件的MD5哈希值:
Invoke-Command -ComputerName RemoteComputerName -ScriptBlock {
$fullPath = Resolve-Path 'c:\Program Files\Internet Explorer\iexplore.exe'
$md5 = new-object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider
$file = [System.IO.File]::OpenRead($fullPath)
$hash = [System.BitConverter]::ToString($md5.ComputeHash($file))
$hash -replace "-", ""
$file.Dispose()
}
团队! 看看我的哈希计算函数。
Function Get-StringHash {
<#
.DESCRIPTION
Get string persistant hash.
#>
[OutputType([string])]
[CmdletBinding()]
Param(
[Parameter( Mandatory = $True, Position = 0, HelpMessage = "String to calculate hash." )]
[string] $String,
[Parameter( Mandatory = $false, Position = 0, HelpMessage = "String encoding." )]
[ValidateSet( 'UTF8' )]
[string] $StringEncoding = 'UTF8',
[Parameter( Mandatory = $false, Position = 2, HelpMessage = "Hash algoritm." )]
[ValidateSet( 'md5', 'sha256', 'sha512' )]
[string] $Algoritm = 'sha256'
)
try {
#region functions
#endregion
$Result = $null
switch ( $Algoritm ) {
'md5' {
$HashProvider = New-Object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider
}
'sha256' {
$HashProvider = New-Object -TypeName System.Security.Cryptography.SHA256CryptoServiceProvider
}
'sha512' {
$HashProvider = New-Object -TypeName System.Security.Cryptography.SHA512CryptoServiceProvider
}
Default {}
}
switch ( $StringEncoding ) {
'UTF8' {
$Encoding = New-Object -TypeName System.Text.UTF8Encoding
}
Default {}
}
$Result = [System.BitConverter]::ToString( $HashProvider.ComputeHash( $Encoding.GetBytes( $String ) )).replace('-','')
}
catch {
Get-ErrorReporting -Trap $_
}
return $Result
}
$String = 'Some text'
$Algoritm = 'MD5'
$Hash = Get-StringHash -String $String -Algoritm $Algoritm
write-host "$String has $Algoritm hash $hash"
推荐文章
- 如何在PowerShell中获得本地主机名?
- PowerShell:如何将数组对象转换为PowerShell中的字符串?
- 从PowerShell ISE中的另一个PS1脚本调用PowerShell脚本PS1
- 如何运行一个PowerShell脚本而不显示窗口?
- PowerShell:仅为单个命令设置环境变量
- 是否有一种方法可以通过双击.ps1文件来使PowerShell脚本工作?
- PowerShell等价于grep -f
- “Write-Host”,“Write-Output”,或“[console]::WriteLine”之间的区别是什么?
- Powershell相当于bash的&号(&),用于分叉/运行后台进程
- PowerShell脚本在机器上返回。net框架的版本?
- 如何在PowerShell中获得MD5校验和
- 如何在PowerShell格式化日期时间
- PowerShell和-contains操作符
- 使用PowerShell删除超过15天的文件
- 数组添加 vs +=