BER Encoding

Created: 2024-08-30T17:37:59-05:00

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A binary encoding used by ASN.1.

Also a notorious source of bugs—though this is because dinguses hand write the parsers instead of using parser generators.

Let's Encrypt article

DER Encoding, a restricted subset

Notes on BER from LDAP code

More notes on BER

Indefinite lengths

A length of 0x80 means indefinite length; the result is the concatenation of objects until 0x00 signals a break.
Indefinite lengths can be nested. ex. adding an indefinite string to an indefinite string. Need a parse stack for correct behavior...