New-Net IPsec Main Mode Crypto Proposal

Module:
netsecurity
Creates a main mode cryptographic proposal that specifies a suite of cryptographic protocols to offer in IPsec main mode negotiations with other computers.

Syntax 

New-NetIPsecMainModeCryptoProposal
   [-Encryption <EncryptionAlgorithm>]
   [-KeyExchange <DiffieHellmanGroup>]
   [-Hash <HashAlgorithm>]
   [<CommonParameters>]

Description

The New-NetIPsecMainModeCryptoProposal cmdlet creates a single cryptographic proposal to be used in main mode negotiations.

A NetIPsecMainModeCryptoProposal object provides three of the mandatory four parameters for the negotiation of a main mode security association (SA): The encryption algorithm is provided in the Encryption parameter, the hashing algorithm in the Hash parameter, and the Diffie-Hellman (DH) key exchange group to be used for the base keying material in the KeyExchange parameter. The remaining parameter; the authentication method, such as Kerberos v5, certificate, or pre-shared key authentication, is given through NetIPsecPhase1AuthSet and NetIPsecPhase2AuthSet objects.

Multiple NetIPsecMainModeCryptoProposal fields are grouped into a single NetIPsecMainModeCryptoSet object. The main mode exchange will use the first proposal that the responder has in common with the sender. A NetIPsecPhase1AuthSet object and a NetIPsecMainModeCryptoSet object get associated to a NetIPsecMainModeRule object to provide all the necessary SA parameters for customized main mode negotiations.

Examples

EXAMPLE 1 

PS C:\>$proposal1 = (New-NetIPsecMainModeCryptoProposal -Encryption DES3 -Hash MD5 -KeyExchange DH1)



PS C:\>$proposal2 = (New-NetIPsecMainModeCryptoProposal -Encryption AES192 -Hash MD5 -KeyExchange DH14)



PS C:\>$proposal3 = (New-NetIPsecMainModeCryptoProposal -Encryption DES3 -Hash MD5 -KeyExchange DH19)



PS C:\>$mMCryptoSet= (New-NetIPsecMainModeCryptoSet -DisplayName "Main Mode Crypto Set" -Proposal $proposal1,$proposal2,$proposal3)


This cmdlet shows an alternative method of accomplishing the previous steps.
PS C:\>$mMCryptoSet = New-NetIPsecMainModeCryptoSet -DisplayName "Main Mode Crypto Set" -Proposal (New-NetIPsecMainModeCryptoProposal -Encryption DES3 -Hash MD5 -KeyExchange DH1),(New-NetIPsecMainModeCryptoProposal -Encryption AES192 -Hash MD5 -KeyExchange DH14),(New-NetIPsecMainModeCryptoProposal -Encryption DES3 -Hash MD5 -KeyExchange DH19) 



PS C:\>New-NetIPsecMainModeRule -DisplayName "Main Mode Rule" -MainModeCryptoSet $mMCryptoSet.Name

This example creates a main mode rule linked to a cryptographic set that contains three cryptographic proposals.

Optional Parameters

-Encryption

Specifies the encryption algorithm to use for IPsec main mode security association negotiations. The block size of the encryption and hashing algorithms must be the same. The acceptable values for this parameter are: None, DES, DES3, AES128, AES192, AES256, AESGCM128, AESGCM192, or AESGCM256. None implies Null Encryption per the RFC standard. The default value is AES256. Neither GCM, for encryption, nor GMAC, for hashing, are supported in main mode. These are quick mode only.

Type: EncryptionAlgorithm
Parameter Sets: None, DES, DES3, AES128, AES192, AES256, AESGCM128, AESGCM192, AESGCM256
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False
-Hash

Specifies the hashing function to use for IPsec main mode security association negotiations. The block size of the encryption and hashing algorithms should be the same. The acceptable values for this parameter are: None, MD5, SHA1, SHA256, SHA384, AESGMAC128, AESGMAC192, or AESGMAC256. The default value is SHA384.

Type: HashAlgorithm
Parameter Sets: None, MD5, SHA1, SHA256, SHA384, AESGMAC128, AESGMAC192, AESGMAC256
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False
-KeyExchange

Specifies the Diffie-Hellman group to use for IPsec main mode security association negotiations. The acceptable values for this parameter are: None, DH1, DH2, DH14, DH19, DH20, or DH24. The default value is None. SameAsMainMode is only valid for proposals added to quick mode cryptographic sets with PerfectForwardSecrecyGroup (PFS) specified using SameAsMainMode.

Type: DiffieHellmanGroup
Parameter Sets: None, DH1, DH2, DH14, DH19, DH20, DH24, SameAsMainMode
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

Inputs

None

Outputs

Microsoft.Management.Infrastructure.CimInstance#root\StandardCimv2\NetIPsecMainModeCryptoProposal

The Microsoft.Management.Infrastructure.CimInstance object is a wrapper class that displays Windows Management Instrumentation (WMI) objects. The path after the pound sign ( # ) provides the namespace and class name for the underlying WMI object.