121 lines
4.2 KiB
Rust
121 lines
4.2 KiB
Rust
//! A text-based data format for cryptographic network protocols.
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//!
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//! ```
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//! use nettext::enc::*;
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//! use nettext::dec::*;
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//! use nettext::crypto::*;
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//!
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//! let final_payload = {
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//! let keypair = gen_signing_keypair();
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//!
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//! // Encode a fist object that represents a payload that will be hashed and signed
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//! let signed_payload = seq([
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//! string("CALL").unwrap(),
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//! string("myfunction").unwrap(),
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//! dict([
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//! ("a", string("hello").unwrap()),
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//! ("b", string("world").unwrap()),
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//! ("c", raw(b"{ a = 12; b = 42 }").unwrap()),
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//! ("d", bytes_split(&((0..128u8).collect::<Vec<_>>()))),
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//! ]).unwrap(),
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//! keypair.public_key().term().unwrap(),
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//! ]).unwrap().encode();
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//! eprintln!("{}", std::str::from_utf8(&signed_payload).unwrap());
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//!
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//! let hash = compute_hash(&signed_payload, None);
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//! let sign = compute_signature(&signed_payload[..], &keypair);
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//!
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//! // Encode a second object that represents the signed and hashed payload
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//! dict([
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//! ("hash", hash.term().unwrap()),
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//! ("signature", sign.term().unwrap()),
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//! ("payload", raw(&signed_payload).unwrap()),
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//! ]).unwrap().encode()
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//! };
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//! eprintln!("{}", std::str::from_utf8(&final_payload).unwrap());
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//!
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//! // Decode and check everything is fine
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//! let signed_object = decode(&final_payload).unwrap();
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//! let [hash, signature, payload] = signed_object.dict_of(["hash", "signature", "payload"], false).unwrap();
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//! let hash = hash.hash().unwrap();
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//! let signature = signature.signature().unwrap();
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//! let expected_hash = compute_hash(payload.raw(), None);
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//! assert_eq!(hash, expected_hash);
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//!
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//! let object2 = decode(payload.raw()).unwrap();
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//!
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//! let [verb, arg1, arg2, pubkey] = object2.seq_of().unwrap();
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//! let pubkey = pubkey.public_key().unwrap();
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//! assert!(verify_signature(&signature, payload.raw(), &pubkey));
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//!
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//! assert_eq!(verb.string().unwrap(), "CALL");
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//! assert_eq!(arg1.string().unwrap(), "myfunction");
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//! ```
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//!
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//! The value of `signed_payload` would be as follows:
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//!
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//! ```raw
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//! CALL myfunction {
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//! a = hello;
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//! b = world;
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//! c = { a = 12; b = 42 };
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//! d = AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4v
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//! MDEyMzQ1Njc4OTo7PD0-P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5f
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//! YGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn8;
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//! } pk.ed25519:inYgWFyL_BzZTsXNKp71r2aVct_3Izi_bkerbzOiz94
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//! ```
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//!
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//! And the value of `final_payload` would be as follows:
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//! ```raw
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//! {
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//! hash = h.b2:B1AnRocS90DmqxynGyvvBNuh-brucNO7-5hrsGplJr0;
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//! payload = CALL myfunction {
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//! a = hello;
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//! b = world;
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//! c = { a = 12; b = 42 };
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//! d = AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4v
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//! MDEyMzQ1Njc4OTo7PD0-P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5f
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//! YGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn8;
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//! } pk.ed25519:inYgWFyL_BzZTsXNKp71r2aVct_3Izi_bkerbzOiz94;
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//! signature = sig.ed25519:LvLC1gHxNxUH44HHQRO-zWtLM4WyXhiYLFr94qTdI311Wa-kmgZsaWqSWe3jcjkS4PnsWSNt5apgbhR68cWWCg;
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//! }
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//! ```
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//!
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//! Note that the value of `text1` is embedded as-is inside `text2`. This is what allows us
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//! to check the hash and the signature: the raw representation of the term hasn't changed.
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pub mod dec;
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pub mod enc;
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#[cfg(feature = "dryoc")]
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pub mod crypto;
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#[cfg(feature = "serde")]
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pub mod serde;
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// ---- syntactic elements of the data format ----
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pub(crate) const DICT_OPEN: u8 = b'{';
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pub(crate) const DICT_CLOSE: u8 = b'}';
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pub(crate) const DICT_ASSIGN: u8 = b'=';
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pub(crate) const DICT_DELIM: u8 = b';';
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pub(crate) const LIST_OPEN: u8 = b'[';
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pub(crate) const LIST_CLOSE: u8 = b']';
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pub(crate) const LIST_DELIM: u8 = b';';
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const BASE_EXTRA_CHARS: &[u8] = b".,:?!@$^<>|&#'_-+*/%";
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const STR_EXTRA_CHARS: &[u8] = b"\\";
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#[inline]
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pub(crate) fn is_string_char(c: u8) -> bool {
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c.is_ascii_alphanumeric() || BASE_EXTRA_CHARS.contains(&c) || STR_EXTRA_CHARS.contains(&c)
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}
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#[inline]
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pub(crate) fn is_whitespace(c: u8) -> bool {
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c.is_ascii_whitespace()
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}
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pub(crate) fn debug(x: &[u8]) -> &str {
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std::str::from_utf8(x).unwrap_or("<invalid ascii>")
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}
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