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TD0657:  IPSEC_EXT.1.6 GCM support for VPN GW

Publication Date
2022.06.29

Protection Profiles
MOD_VPNGW_v1.2

Other References
FCS_IPSEC_EXT.1.6

Issue Description

FCS_IPSEC_EXT.1.6 in MOD_VPNGW_V1.2 incorrectly labeled two AES-GCM algorithms as AES-CBC.

Resolution

FCS_IPSEC_EXT.1.6 in MOD_VPNGW_V1.2 is modified as follows, with strikethrough denoting deletions and underline denoting additions:

FCS_IPSEC_EXT.1.6         The TSF shall ensure the encrypted payload in the [selectionIKEv1IKEv2] protocol uses the cryptographic algorithms [selectionAES-CBC-128AES-CBC-192AES-CBC-256 (specified in RFC 3602)AES-GCM-128AES-CBC-192, AES-CBCGCM-256 (specified in RFC 5282)].

 

Application Note: This element is unchanged from its definition in the Base-PP to remove AES-GCM-192, which is not recommended. AES-CBC implementation for IPsec is specified in RFC 3602. AES-GCM implementation for IPsec is specified in RFC 5282.

Justification

RFC 5282 specifically calls out AES-GCM-192 as not recommended, so it should be removed from an option.

 
 
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