Created
August 17, 2017 14:31
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@mattifestation's SSLValidation PoSH script
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function Disable-SSLValidation{ | |
<# | |
.SYNOPSIS | |
Disables SSL certificate validation | |
.DESCRIPTION | |
Disable-SSLValidation disables SSL certificate validation by using reflection to implement the System.Net.ICertificatePolicy class. | |
Author: Matthew Graeber (@mattifestation) | |
License: BSD 3-Clause | |
.NOTES | |
Reflection is ideal in situations when a script executes in an environment in which you cannot call csc.ese to compile source code. If compiling code is an option, then implementing System.Net.ICertificatePolicy in C# and Add-Type is trivial. | |
.LINK | |
http://www.exploit-monday.com | |
#> | |
Set-StrictMode -Version 2 | |
# You have already run this function | |
if ([System.Net.ServicePointManager]::CertificatePolicy.ToString() -eq 'IgnoreCerts') { Return } | |
$Domain = [AppDomain]::CurrentDomain | |
$DynAssembly = New-Object System.Reflection.AssemblyName('IgnoreCerts') | |
$AssemblyBuilder = $Domain.DefineDynamicAssembly($DynAssembly, [System.Reflection.Emit.AssemblyBuilderAccess]::Run) | |
$ModuleBuilder = $AssemblyBuilder.DefineDynamicModule('IgnoreCerts', $false) | |
$TypeBuilder = $ModuleBuilder.DefineType('IgnoreCerts', 'AutoLayout, AnsiClass, Class, Public, BeforeFieldInit', [System.Object], [System.Net.ICertificatePolicy]) | |
$TypeBuilder.DefineDefaultConstructor('PrivateScope, Public, HideBySig, SpecialName, RTSpecialName') | Out-Null | |
$MethodInfo = [System.Net.ICertificatePolicy].GetMethod('CheckValidationResult') | |
$MethodBuilder = $TypeBuilder.DefineMethod($MethodInfo.Name, 'PrivateScope, Public, Virtual, HideBySig, VtableLayoutMask', $MethodInfo.CallingConvention, $MethodInfo.ReturnType, ([Type[]] ($MethodInfo.GetParameters() | % {$_.ParameterType}))) | |
$ILGen = $MethodBuilder.GetILGenerator() | |
$ILGen.Emit([Reflection.Emit.Opcodes]::Ldc_I4_1) | |
$ILGen.Emit([Reflection.Emit.Opcodes]::Ret) | |
$TypeBuilder.CreateType() | Out-Null | |
# Disable SSL certificate validation | |
[System.Net.ServicePointManager]::CertificatePolicy = New-Object IgnoreCerts | |
} |
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