Simon J. Gerraty
9ca2cfeb4e
For 2027 we need to support new, stronger signatures and hashes. Re-work Makefile.inc and local.trust.mk to define VE_SIGN_URL_LIST or VE_SIGNATURE_LIST (can be derrived from VE_SIGN_URL_LIST) containing tuples of sig/method/hash/flags and for VE_SIGN_URL_LIST the same plus /url. From VE_SIGNATURE_LIST we derrive VE_SIGNATURE_EXT_LIST used to populate signature_ext_list which defines the order in which we look for signatures for a manifest. We also populate signature_info_list which maps a signature ext to the needed hash and flags to indicate whether that hash needs to be repeated. verify_sig will lookup signature_info_list, no match means not supported. For asc we just call verify_asc() otherwise we call verify_ec() or verify_rsa() depending on the key type found in the certificate chain, we pass the signature_info entry to these so they know which hash to use and whether to repeat it. The need to repeat the hash is a consequence of sending a hash to a server using signature methods that insiste on hashing their input. To-date only our original ECDSA signatures use this. A FakeHash class added in 2012 avoids that wrinkle. This is a much more flexible arrangement and should be more readily usable by others. Sponsored by: Hewlett Packard Enterprise Development LP. Reviewed by: imp Differential Revision: https://reviews.freebsd.org/D61007
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