README.md
In agecrypt: File Encryption with the 'age' Format

Test fixtures — provenance

`vectors/`

A curated subset of the official age test vectors from the C2SP CCTV project (the "testkit"):

They were taken from the vendored agec test suite (test/vectors/dec/, https://git.sr.ht/~min/agec), which mirrors the testkit. Each file is a key: value metadata header, a blank line, then the raw ciphertext body; test-vectors.R parses that format and uses the files as known-answer (success) and malformed-input (failure) tests to check spec compliance. This is a small subset covering X25519 and scrypt, success and failure cases; the full set lives upstream.

Licence: the CCTV vectors are Copyright (c) 2022 The age Authors and are available under your choice of Zero-Clause BSD, CC0 1.0, or the Unlicense — see the upstream age/README.md. Their redistribution here is compatible with this package's licensing (see inst/COPYRIGHTS).

`interop/`

Ciphertexts and a throwaway key file generated locally with the reference age implementation (FiloSottile/age v1.3.1, https://github.com/FiloSottile/age). test-interop-fixtures.R uses them to confirm that this package decrypts files produced by an independent implementation (binary, ASCII-armored, and a sub-probe-size payload). key.txt is a disposable identity created only for these tests and protects nothing.

sweep/ holds reference-age ciphertexts of strrep("A", n) for n in {0, 5, 34, 35, 100, 70000}, both binary (size-<n>-bin.age) and ASCII-armored (size-<n>-arm.age), to the same key.txt recipient. The sizes straddle the 35-byte armor-detection probe and the 64 KiB STREAM chunk boundary (70000 spans two chunks). The payload is reconstructed from the file name, so only the ciphertext is committed.

These files are checked in and the reference age binary is only used to create them, never at test time — the suite runs entirely offline, which is required on CRAN check machines. Regenerate (or refresh against a newer age) with tools/gen-interop-fixtures.R, which also asserts the reverse direction — that reference age decrypts ciphertext this package produces — as a one-time offline check that cannot be captured as a static fixture.