Specifying Bit Flags Smart

In the previous tip you have seen how you can enable all SSL security protocols in PowerShell to connect to web services and web sites:

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Ssl3 -bor [Net.SecurityProtocolType]::Tls -bor [Net.SecurityProtocolType]::Tls11 -bor [Net.SecurityProtocolType]::Tls12

Funny enough, a much shorter line will work just as well:

[Net.ServicePointManager]::SecurityProtocol = 'Ssl3, Tls, Tls11, Tls12'

Here is why:

Since the SecurityProtocol property is of Net.SecurityProtocolType type, when you submit string data instead, it is auto-converted:

 
PS> [Net.ServicePointManager]::SecurityProtocol.GetType().FullName 
System.Net.SecurityProtocolType 
 

Rather than using the SecurityProtocolType enumeration and concatenate flags with the -bor operator, you can use a comma-separated string with the bitflag names. These two are equivalent:

$a = [Net.SecurityProtocolType]::Ssl3 -bor [Net.SecurityProtocolType]::Tls -bor [Net.SecurityProtocolType]::Tls11 -bor [Net.SecurityProtocolType]::Tls12
$b = [Net.SecurityProtocolType]'Ssl3, Tls, Tls11, Tls12'
 
PS> $a -eq $b
True 
 

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