Reading PGP key information

can someone show a description of the information of what a pgp looks like if only the descriptions were there but not the actual information? something like (i dont remember if the values are correct):

packet-type[4 bits], total length in bytes[16 bits], packet version type [4 bits], creation开发者_开发知识库-time[32 bits], encryption-algorithm[8 bits], ...,etc,etc

ive tried to understand rfc4880, but its tedious and confusing. so far, i am think i have extracted the 4 i wrote above, but i cant seem to get the rest of the information out.

can anyone help? i know i can just find some pgp program, but the whole point of this is to allow me to learn how those programs work in the first place

Read carefully section 4.2 of RFC 4880, there different packet formats, with different packet length encodings.