103 lines
3.5 KiB
Rust
103 lines
3.5 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::{self, Signer, Verifier};
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//!
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//! let keypair = crypto::generate_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 text1 = encode(list([
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//! string("CALL"),
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//! string("myfunction"),
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//! dict([
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//! ("a", string("hello")),
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//! ("b", string("world")),
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//! ("c", raw(b"{ a = 12, b = 42 }")),
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//! ("d", bytes_split(&((0..128u8).collect::<Vec<_>>()))),
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//! ]),
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//! keypair.public.term(),
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//! ])).unwrap();
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//! eprintln!("{}", std::str::from_utf8(&text1).unwrap());
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//!
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//! let hash = crypto::Blake2Sum::compute(&text1);
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//! let sign = keypair.sign(&text1);
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//!
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//! // Encode a second object that represents the signed and hashed payload
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//! let text2 = encode(dict([
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//! ("hash", hash.term()),
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//! ("signature", sign.term()),
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//! ("payload", raw(&text1)),
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//! ])).unwrap();
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//! eprintln!("{}", std::str::from_utf8(&text2).unwrap());
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//!
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//! // Decode and check everything is fine
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//! let object1 = decode(&text2).unwrap();
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//! let [hash, signature, payload] = object1.dict_of(["hash", "signature", "payload"], false).unwrap();
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//! assert!(hash.b2sum().unwrap().verify(payload.raw()).is_ok());
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//! assert_eq!(payload.raw(), text1);
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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.list_of().unwrap();
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//! let pubkey = pubkey.public_key().unwrap();
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//! assert!(pubkey.verify(payload.raw(), &signature.signature().unwrap()).is_ok());
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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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//! assert_eq!(pubkey, keypair.public);
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//! ```
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//!
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//! The value of `text1` 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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//! } 1hUAS2C0lzHXHWIvXqwuhUYVPlu3BbZ7ANLUMH_OYjo
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//! ```
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//!
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//! And the value of `text2` would be as follows:
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//! ```raw
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//! {
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//! hash = Se6Wmbh3fbFQ9_ilE6zGbxNaEd9v5CHAb30p46Fxpi74iblRb9fXmGAiMkXnSe4DePTwb16zGAz_Ux4ZAG9s3w,
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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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//! } 1hUAS2C0lzHXHWIvXqwuhUYVPlu3BbZ7ANLUMH_OYjo,
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//! signature = 8mo3aeQD7JAdqbDcm7oVdaU0XamDwg03JtC3mfsWhEy_ZkNmWBFZefIDlzBR3XpnF0szTzEwtoPFfnR1fz6fAA,
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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 crypto;
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pub mod dec;
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pub mod enc;
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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 STR_EXTRA_CHARS: &[u8] = b"._-+*?";
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pub(crate) fn is_string_char(c: u8) -> bool {
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c.is_ascii_alphanumeric() || STR_EXTRA_CHARS.contains(&c)
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}
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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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