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Crypto (#19): add the OS cryptographically-secure random surface (random_bytes/random_hex/random_u32, reading /dev/urandom) and a standard base64 encoder, completing the library alongside the existing SHA-256/ HMAC-SHA256/verify_hmac/hex/ct_equal. All pure integer IR, C-free. Uuid (#16): a new namespace for stable, collision-free IDs — v4 (random) and v7 (time-ordered) generation, plus parse/is_valid/to_text/equals/nil. UUIDs are canonical lowercase 36-char strings; v4 and v7's random tail draw from the crypto CSPRNG, so both carry the documented determinism caveat (mint at the edges, never inside lockstep simulation). Reuses the crypto prelude's fn_secure_bytes / fn_hex_encode. - examples/library/{crypto,uuid}.ludic: known-answer vectors (SHA-256, HMAC, base64 per RFC 4231/4648) and structural invariants (uuid version/variant bits, parse/equals), wired into `x test` (now 51 passed). - docs: per-symbol pages for every new method + a new Uuid section; inventory and impl-vs-docs coverage check pass. - seed regenerated; `x bootstrap-cfree` fixpoint holds. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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| id | name | category | kind | tokens | sig | tip | order | ns | member |
|---|---|---|---|---|---|---|---|---|---|
| crypto-base64 | Crypto.base64 | crypto | namespace-method | Crypto.base64 | Crypto.base64(s) -> string | Standard base64 (RFC 4648) of a string's bytes. | 9 | Crypto | base64 |
Encodes the bytes of s as standard base64 (RFC 4648, the A–Z a–z 0–9 + / alphabet with = padding). Base64 turns arbitrary bytes into printable ASCII, which is what you want when a digest, key, or binary blob has to travel through a text-only channel — a JSON field, a URL-safe token wrapper, a config file, a log line. It is an encoding, not encryption: it hides nothing and adds no integrity. Pair it with Crypto.hmac_sha256 when the payload must also be tamper-evident.
The output length is always a multiple of four; a one- or two-byte remainder in the input is padded with =.
Parameters:
s— the string whose bytes are encoded
program Encode {
entry {
print(Crypto.base64("foobar")) # Zm9vYmFy
print(Crypto.base64("f")) # Zg==
}
}