Recently we introduced uniform styling for module docs over in
`rust-bitcoin` repo. We can do the same here but its a bit controversial
because it removes the heading from module docs and every single public
module in rust-secp256k1 uses a heading. Instead we use a full
sentences. Also makes uniform the trailing `//!`.
As is typical in the Rust ecosystem use the third person tense when
documenting functions. E.g.,
```
/// Creates a new Foo.
```
As opposed to
```
/// Create a new Foo.
```
Example relies on `rand-std` not plain `rand` dependency.
I do not understand why the following command passes without this patch
applied
```
cargo test --no-default-features --features=std,rand,bitcoin_hashes
```
But if we put the same code in a standalone binary it fails as expected?
Since the running of this test is _unusual_ and it is primarily meant as
an entry point example to the library, remove the mention of "alloc"
feature and just depend upon "std".
Currently when debug printing the `RecoverableSignature` we do so byte
by byte, this means that the output differs depending on the endianess
of the machine. If instead we serialize the signature in compact form
then the output is the same irrespective of the endianess.
With this applied the following two commands now pass:
```
cargo test test_debug_output --features=recovery
```
cross test --target powerpc-unknown-linux-gnu test_debug_output --features=recovery
```
Fixes: #375
b3503ba148 Add example to SharedSecret (Tobin Harding)
Pull request description:
Currently the rustdoc on `SharedSecret` is wildly incorrect (possibly a cut'n'pasta error).
Fix the rustdoc for `SharedSecret` and add an examples section to assist testing the public API.
Fixes: #249
ACKs for top commit:
apoelstra:
ACK b3503ba148
Tree-SHA512: 650092388099bb415c11ea335ca6b64c90094f1a51ceecc403911316ee62da0279488af6fa66e00ee5269c129f06d4641085f8ab9be91c98d24a7a4449d235c2
Currently the rustdoc on `SharedSecret` is wildly incorrect (possibly a
cut'n'pasta error).
Fix the rustdoc for `SharedSecret` and add an examples section to assist
testing the public API.
Fixes: 249
Now that we opportunistically randomize the context on creation if
`rand-std` is enabled it would be nice to encourage users who do not
wish to use `rand-std` to randomize the context. We already have an API
to do this but it requires a separate call to do so. Instead of adding a
bunch of additional constructors elect to add documentation to the
current constructors guiding users towards randomization.
We recently implemented opportunistic randomization of the context
object if the the `rand-std` feature is enabled. Both for the global
context and also for signing context constructors.
Add documentation about `rand-std` feature in relation to the context
object.
Instead of providing a mechanism for users to opt out of randomization
we can just feature gate the call site i.e., opportunistically randomize
the global context on creation if `rand-std` feature is enabled.
2732891359 Change rand to rand-std in lib.rs documentation (Vincent Liao)
Pull request description:
I copy-pasted the key-generation example written on the documentation, but it didn't work. It only worked when I used the feature `rand-std` instead of `rand`.
To reproduce, boot up a new Rust project, and add this to main.rs:
```
use secp256k1::rand::rngs::OsRng;
use secp256k1::{Secp256k1, Message};
use secp256k1::hashes::sha256;
let secp = Secp256k1::new();
let mut rng = OsRng::new().expect("OsRng");
let (secret_key, public_key) = secp.generate_keypair(&mut rng);
let message = Message::from_hashed_data::<sha256::Hash>("Hello World!".as_bytes());
let sig = secp.sign_ecdsa(&message, &secret_key);
assert!(secp.verify_ecdsa(&message, &sig, &public_key).is_ok());
```
Using this dependencies causes error: `secp256k1 = {version="0.21.2", features=["rand", "bitcoin_hashes"]}`. After replacing `rand` with `rand-std`, it works.
ACKs for top commit:
apoelstra:
ACK 2732891
tcharding:
tACK 2732891359
Tree-SHA512: 6b5436bc71bab7535e432e119679bc6bcb11d2575b609e039cc25c122ae92b528f95a673e9c643a6cfa2ee3a663f7efdd61731b6084261c52a220448b6f72d12
Seems there is a bug in cargo, the tests in `key.rs` run successfully
but AFAICT they should fail. Here is an example, running `cargo test
--features=rand` should make this test fail but it doesn't?
```
/// Secret 256-bit key used as `x` in an ECDSA signature.
///
/// # Examples
///
/// Basic usage:
///
/// ```
/// # #[cfg(all(feature = "rand", any(feature = "alloc", feature = "std")))] {
/// use secp256k1::{rand, Secp256k1, SecretKey};
///
/// let secp = Secp256k1::new();
/// let secret_key = SecretKey::new(&mut rand::thread_rng());
/// # }
/// ```
Anywho, use the correct feature gate: `rand-std`.
Various combinations of features trigger lint warnings for unused code,
all warnings are caused by incorrect feature gating.
Correct feature gating to remove Clippy warnings during testing.
Currently various features fail to build when enabled without default
features. This is because many tests need feature gating.
Feature gating the import statements quickly turns into spaghetti when
trying to cover all combinations of two features correctly, instead just
allow unused imports on `tests` modules where needed.
Add correct feature requirements to the examples so they also can be run
without default features.
Improve the CI script by doing:
- Add `std` to the feature matrix.
- Add `--no-default-features` to test runs in the CI script.
The `Debug` implementation for secrets is feature gated on `std` because
it uses a hasher from `std`. If `bitcoin_hashes` is enabled we can use
it for hashing. If neither `std` nor `bitcoin_hashes` is enabled fall
back to outputting:
<secret requires std or bitcoin_hashes feature to display>
Remove the docs conditional since we now implement `Debug` always.
aa828f01a5 Improve documentation in the key module (Tobin Harding)
9e46d6f122 Add examples to types and methods in key module (Tobin Harding)
a7f3d9bcfd Improve key module docs (Tobin Harding)
6d23614467 Improve lib.rs rustdocs (Tobin Harding)
4c4268f1ad Improve docs on method generate_keypair (Tobin Harding)
Pull request description:
This PR is an initial attempt to more thoroughly test our public API.
Add examples to various types/methods/functions in the key module.
I'm not entirely sure when is enough, do we want an example on every single public method, function, and type or is this overkill. In this PR I tried to find a balance by doing ever method/function that took an argument that is a custom type from this lib. I think this should be extended to include return values too though ...
Thanks to @thomaseizinger for the idea!
First 2 patches are docs improvements to `lib.rs`.
ACKs for top commit:
apoelstra:
ACK aa828f01a5
Tree-SHA512: 9383ad263469f98ce7e988d47edc1482a09a0ce82f43d3991bd80aabdf621430f4a3c86be4debf33232dcb1d60d3e81f2c6d930ea7de7aa0e34b037accd7bc98
We recently patched much of the docs in the `key` module, lets attempt
to attain perfection.
Improve docs by doing:
- Use full stops
- Use 100 character column width
- Use plural third person tense
- Use plural for section headings
- Fix any grammar mistakes
- Use code ticks and links as appropriate
Done in an effort to better test our public API.
Add tests in the `Examples` section as is idiomatic in the Rust
ecosystem.
Make other minor improvements to any rusdocs we touch:
- Use full stops
- Use 100 character column width
- Use plural third person tense
- Use plural for section headings
Improve method docs by doing:
- Remove 'batch' comment
- Remove mention of required features, docs already show this
- Use links to types as well as ticks
Recently we made a wee mess with the `Parity` opaque type. Let's fix it
up by doing:
- Use an enum with variants `Even` and `Odd`.
- Add explicit conversion methods to/from u8 and i32
- Implement `BitXor`
Note: This patch is an API breaking change that does _not_ follow the
deprecation guidelines. Rust does not allow deprecating `From` impl
blocks AFAICT.
47411ce73d Fix typo in documentation (Tobin Harding)
Pull request description:
Docs reference a function name but there is a typo.
'grund' -> 'grind'.
ACKs for top commit:
apoelstra:
ACK 47411ce73d
Tree-SHA512: e6724f1c7972625d59be0ae9de358295c9280e2e126e7322d706cbdca342c1189552b2fdeef9370ff4f85ea8ef185ef4447f6693979d5e8548fcfa2df41a491e
Recently we deprecated a bunch of methods/functions. We are still
calling them in test code. Found by Clippy.
Use the shiny new methods/functions instead of the deprecated ones.
We have deprecated all other functions that use the identifier
'schnorrsig' but we missed `generate_schnorrsig_keypair`.
This function is purely a helper function and serves no real purpose
other than to reduce two lines of code to a single line. Downstream
users can write this function themselves if they need it.
Also, we recently added a new public method to `KeyPair` to get the
public key in a slightly more ergonomic fashion. Use `kp.public_key()`
when replacing usage of now deprecated `generate_schnorrsig_keypair`
function.
Currently to get the `XOnlyPublicKey` from a `KeyPair` users must do
`XOnlyPublicKey::from_keypair(&kp)`. While this does the job we can make
the lib more ergonomic by providing a method directly on `KeyPair` that
calls through to `XOnlyPublicKey::from_keypair`.
Add method `KeyPair::public_key(&self)`.
314e8755df Clarify `global-context` feature (Martin Habovstiak)
d52ab85dd5 Added missing features to docs.rs config (Martin Habovstiak)
Pull request description:
Sadly, I missed two details in #353: features missing in docs.rs configuration and `global-context` being a bit confusing.
This PR fixes those, see commit messages for details.
ACKs for top commit:
apoelstra:
ACK 314e8755df
Tree-SHA512: 01bed8ae2f30adcbdd436b514f08a084492d7f4e1a739ca62e6d8b8547e379c01faeda3522733c27ab615acbb4c6cff60e13906cc88a0d2b90e439e7da517466
656f19407b Remove capital letter in middle of docs sentence (Tobin Harding)
Pull request description:
(Candidate for most trivial patch of all time.)
Seems to be a typo, change the 'L' to an 'l'.
ACKs for top commit:
real-or-random:
ACK 656f19407b
Tree-SHA512: 06a4712868c3195a8465b9cf7bd39e55a30e37574086ca27cb032e0109a8fe053411426a15bcb354642bf78e6420b6fa2789ca487c6cc499f741a11220d5dc22
Previously only `global-context-less-secure` was shown in the doc even
though `global-context` may also work. This was strictly correct because
`global-context` implies `global-context-less-secure` which is also
documented but people could miss it or forget about it and then worry
about security or worse, enable less secure feature.
Calling out both fetures seems useful, even important and thankfully
doesn't seem to cause too much noise in the docs.
Currently we have an implementation of `Debug` (also used by `Display`)
for `Signature` that first converts the sig to a `SerializedSignature`
then prints it as hex.
We would like to have an implementation of `Debug` for
`SerializedSignature`, this cannot be derived because of the `data: [u8;
field]`. We can manually implement `Debug` for `SerializedSignature`
exactly as it is currently done for `Signature` and call this new
implementation from `Signature::fmt()`.
This code path is already tested in `lib.rs` in the test function
`signature_display`.
Rustc can warn us when we forget to add `Copy` and `Deubg` trait
implementations to types.
Add lint directives to enable warnings for missing `Copy` and `Debug`
implementations. Use the newly emitted warnings to find types that do
not implement our 'standard' traits. These 'standard' traits are defined
as the set of attributes that it has been found beneficial to
opportunistically add to all types, these are
- Copy
- Clone
- Debug
- PartialEq and Eq
- PartialOrd and Ord
- Hash
e595b39510 Re-export Parity struct (sanket1729)
Pull request description:
pub struct Parity is under a private module key and not re-exported in lib.rs . It is therefore not
possible to use it downstream.
ACKs for top commit:
elichai:
ACK e595b39510
apoelstra:
ACK e595b39510
Tree-SHA512: 2573689f9a08505c8dfe8f79cd921d5a2742a2a2f4f92cf4066fe6557c765c756531d13560fa4fe6461f094b0c11a52aca30b44542eb77eda7dd1ebd24d3b155
18f74d5242 Clarify what does "less security" mean (Martin Habovstiak)
94c55b4d09 Fixed typos/grammar mistakes (Martin Habovštiak)
1bf05523f0 Documented features (Martin Habovstiak)
Pull request description:
This documents the Cargo features making sure docs.rs shows warning for
feature-gated items. They are also explicitly spelled out in the crate
documentation.
The PR is similar in spirit to https://github.com/rust-bitcoin/rust-bitcoin/pull/633
ACKs for top commit:
apoelstra:
ACK 18f74d5242
Tree-SHA512: 8aac3fc5fd8ee887d6b13606d66b3d11ce44662afb92228c4f8da6169e3f70ac6a005b328f427a91d307f8d36d091dcf24bfe4d17dfc034d02b578258719a90a
This documents the Cargo features making sure docs.rs shows warning for
feature-gated items. They are also explicitly spelled out in the crate
documentation.
It is not immediately apparent what 'err == 1' means, one must determine
that the FFI function call returns 1 for success. We can help readers of
the code by adding a 'Return' section to the method documentation.
Add trailing full stop to method docs initial line also.
Two functions in the FFI secp code return and accept a parity int.
Currently we are manually converting this to a bool. Doing so forces
readers of the code to think what the bool means even though
understanding this bool is not needed since in is just passed back down
to the FFI code. We can abstract this away by using an opaque type to
hold the original int and not converting it to a boolean value.
Add 'Return' and 'Error' sections to `tweak_add_assign` while fixing the
docs to describe the new opaque parity type.
We have two `tweak_add_assign` methods (one for keypair and one for
x-only pubkey). Both check the return value from a FFI function call.
We can make both sites uniform to _slightly_ reduce cognitive load when
reading the code.
Use C style code to make it obvious to readers that this is basically C
code.
There are currently two unit tests in the `schnorr` module that are
testing keys from the `key` module. This is possible because the tests
are only testing the public interface, none the less they are better
placed in the `key` module.
The import statements can be simplified by using an import
wildcard (`super::*`). While we are at it put them in std, external
crate, this crate order.
21aa914ad2 Change context objects for schnorr sig methods (sanket1729)
Pull request description:
- The current schnorrsig verify methods should operate on verify context
as is done throughout the bitcoin core
- Finally, and importantly the XonlyPublicKey::from_keypair now operates
without any context parameter.
ACKs for top commit:
apoelstra:
ACK 21aa914ad2
Tree-SHA512: 035338f19839805a080eb262ae7b93ab187dabb63086c8b7f6015f3a6006986604dc2c6f329a99a20ddfa78c1ee518f44cd5eee2f73810fbdc83ff8df7d12506
- The current schnorrsig verify methods should operate on verify context
as is done throughout the bitcoin core
- Scondly, and importantly the XonlyPublicKey::from_keypair now operates
without any context objects.
The public key is unrelated to the signature algorithm. It will
be moved out of the module in another commit. For ease of review,
the renamed is kept separate.
With the introduction of Schnorr signatures, exporting a `Signature`
type without any further qualification is ambiguous. To minimize the
ambiguity, the `ecdsa` module is public which should encourage users
to refer to its types as `ecdsa::Signature` and `ecdsa::SerializedSignature`.
To reduce ambiguity in the APIs on `Secp256k1`, we deprecate several
fucntions and introduce new variants that explicitly mention the use of
the ECDSA signature algorithm.
Due to the move of `Signature` and `SerializedSignature` to a new module,
this patch is a breaking change. The impact is minimal though and fixing the
compile errors encourages a qualified naming of the type.
24d6f62603 Use explicit u8 when assigning a byte slice (junderw)
Pull request description:
Is there a way to tell the compiler to not allow `[0; 64]` and require that either the type is explicitly given to the variable, or that each member uses explicit `0u8` notation?
I noticed the usage was a mix of explicit and implicit, so I changed all to explicit.
ACKs for top commit:
apoelstra:
ACK 24d6f62603
Tree-SHA512: f7796dcc3ae240983257bef0f25bd0df741943f75d86e9bca7c45076af179d96ce213bd9c339a01f721f7dc9b96a0a4a56ef2cf44339f4c91d208103b7659d9f
bc42529a16 Rename `secp256k1::bitcoin_hashes` module to `secp256k1::hashes` (Thomas Eizinger)
ae1f8f4609 Bump bitcoin_hashes to version 0.10 (Thomas Eizinger)
Pull request description:
Requires for interoperability of the `ThirtyTwoByteHash` trait with
rust-bitcoin.
ACKs for top commit:
apoelstra:
ACK bc42529a16
Tree-SHA512: 85fcb284ff82b543a0c3ea2b568351b3af938a26ac42c6a975480ae97def84e4f0795105bd4572f930a7bf82654eba416cf0c5e25f62809e2ea331443ffb5807
This reduces the usage of real cryptography in --cfg=fuzzing,
specifically replacing the secret->public key derivation with a
simple copy and ECDH with XOR of the public and private parts
(plus a stream of 1s to make a test pass that expected non-0
output).
It leaves secret tweak addition/multiplication as-is.
It also changes the context creation to over-allocate and store
the context flags at the end of the context buffer, allowing us
to easily test context flags in each function.
While it would be nice to have something fancier (eg XOR-based),
its not immediately obvious how to accomplish this, and better to
fix the issues I have than spend too much time on it.
Fixes#271.
This partially reverts b811ec133a
In the next commit the secret->public key derivation in fuzzing cfg
is changed to be simpler, as well as the validity rules of public
keys relaxed.
This adds a new test to ensure random keys can be added, not just
the hard-coded keys test that exists today.
Panicking from C is not UB in newer rust versions and will reliably
trigger an abort (without unwinding). In older rust versions, it is
technically UB but empirically it seems to "just work" (and what should
it realistically do except crashing, which is what we intent).
Since there's potentially no unwinding, we can't test this behavior
using [should_panic]. This PR will instead check the libtest output
explicitly in our CI tests.
Fixes#228.
There is little reason to pull in the `rand` dep just for the `Rng`
trait for users who want to randomize contexts. We should expose a
randomize function that just takes 32 bytes.
We can now run unit tests with the fuzz feature on, and they'll pass,
which is some assurance that fuzzing with the feature on won't lead to
spurious failures due to the fuzz harness inadequately simulating message
signing.
Currently we are misusing `map` on an iterator to loop `n` times,
additionally the assertion is pointless. Use a for loop and assert
against the length of the set.
Instead of repeating ourselves in defining one big test for the wasm
target, we can override the `test` attribute with the `wasm-bindgen-test`
one and therefore automatically run all (supported) tests in wasm.
Unfortunately, wasm doesn't support catching panics yet which means we
have to disable the `test_panic_raw_ctx` test.
The interfaces for negate should always returns 1 as mentioned secp256k1.h L574, L563.
But in the future it might return 0 if the seckey or pubkey is invalid, but our type system doesn't allow that to ever happen.
libsecp256k1 really only barely uses libc at all, and in practice,
things like memcpy/memcmp get optimized into something other than a
libc call. Thus, if we provide simple stub headers, things seem to
work with wasm-pack just fine.
We would not want to use these functions internally because we rely on
USE_EXTERNAL_DEFAULT_CALLBACKS to provide the callbacks at link time,
see f7a4a7ef57. Moreover, we would not
want to export the functions either.
Tobin Harding
Andrew Poelstra
Vincent Liao
elsirion
Martin Habovstiak
sanket1729
Dr Maxim Orlovsky
Thomas Eizinger
junderw
Elichai Turkel
Tibo-lg
Matt Corallo
Devrandom
Tim Ruffing
Justin Moon
Sebastian Geisler
Kohei Taniguchi
Kirill Fomichev
Wei Tang
Steven Roose
Tony Jin
Rodolfo Araujo