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[openpgp] Question on computing v5 signatures

2019-05-01 14:29:32
Dear friends of OpenPGP,

regarding compution of v5 signatures we have the following lines
in section 5.2.4 of the current draft RFC 4880bis-06:

  "a eight-octet big-endian number that is the length of the
   hashed data from the Signature packet stopping right before the
   0x05, 0xff octets."

I am wondering why a number of eight-octet size is used here. The
biggest field, AFAIS i.e. the hashed subpacket data area, is limited
by the included two-octet hashed subpacket length. So why 64 bit?

--
Heiko

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