mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
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187 lines
5.7 KiB
Markdown
187 lines
5.7 KiB
Markdown
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# Contributing to Kryptology
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Kryptology is Apache 2.0 licensed and accepts contributions via
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GitHub pull requests.
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# Ways to contribute to Kryptology
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- Bugs or issues: Report problems or defects as github issues
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- Features and enhancements: Provide expanded capabilities or optimizations
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- Documentation: Improve existing documentation or create new information
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- Tests for events and results:
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- Functional
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- Performance
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- Usability
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- Security
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- Localization
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- Recovery
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- Deployability
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# Code guidelines
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Use go style comments for all public functions, structs, and constants.
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Export only what is absolutely necessary.
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# The Commit Process
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When contributing code, please follow these guidelines:
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- Fork the repository and make your changes in a feature branch
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- Include unit and integration tests for any new features and updates to existing tests
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- Ensure that the unit and integration tests run successfully.
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- Check that the lint tests pass
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## Important
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Use `git rebase origin/master` to limit creating merge commits.
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Kryptology accepts single commits. If you have more than one, they will be
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squashed when merged.
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## Commit Email Address
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Your commit email address must match your GitHub or GitLab email address. For more information, see https://help.github.com/articles/setting-your-commit-email-address-in-git/.
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## Commit messages
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Each commit message consists of a header, a body, and a footer.
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The header includes a type, a scope and a subject:
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```markdown
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<type>(<scope>): <subject>
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<BLANK LINE>
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<body>
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<BLANK LINE>
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<footer>
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```
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`<subject>` *required*, must not be longer than 100 characters.
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`<type` *required*, must be lower case and have one of the following values:
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- `build:` changes that affect the build system or external dependencies. Kryptology uses buildkite.
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- `chore:` some minor change that doesn't fall in any of the other types
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- `ci:` changes to the continuous integration configuration files
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- `docs:` documentation only change
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- `feat:` new feature
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- `fix:` a bug fix
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`<scope>` *optional*, must be lower case and have a tag about which primitive it affects like 'tecdsa/dkls', 'paillier', 'verenc'.
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`<subject>` *optional*, must be lower case and not end in a period describing changes in the imperative-mood.
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`<body>` *optional*, characters no more 100 wide, must have a blank line above it describing changes in the imperative-mood.
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`<footer>` *optional*, must not be longer than 100 characters.
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For more information see [here](https://gist.github.com/joshbuchea/6f47e86d2510bce28f8e7f42ae84c716)
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**Kryptology requires that all commits are signed by a PGP key.**
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## Issues and Bugs
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If you find a bug in the source code, help us by submitting an issue to the repository. Even better, submit a Pull Request with a fix.
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Before submitting an issue search the archive, maybe your question is already answered.
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If the issue is a bug, and hasn't been reported, open a new issue. Help us to maximize the effort we can spend fixing issues and adding new features, by not reporting duplicate issues.
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For security bugs see the security [policy](SECURITY.md).
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In general, providing the following information will increase the chances of the issue being handled quickly:
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**Expected Behavior** - Is there documentation or an example that represents the discrepancy?
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**Actual Behavior** - Be sure to explain why this is a bug for you.
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**Steps to Reproduce the Problem** - Code snippets and screen shots are always helpful.
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**Environment** - What hardware, OS, and versions are you using?
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**Suggest a Fix** - if you can't fix the bug yourself, perhaps you can point to what might cause the problem (line of code or commit)
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## Referencing
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When contributing a new protocol or cryptosystem please include references, page numbers and equations.
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Document any deviations from the protocol and include an updated security proof if needed.
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## Hashing functions
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When using hash functions in protocols, use the following guidelines when
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32-byte output - SHA3-256
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\*-byte output - SHAKE-256
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Sigma protocols use [Merlin](https://merlin.cool/) transcripts.
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## Constant time
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We make every effort to make code cryptographically constant time. All contributions to cryptography related code
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should be constant time unless explicitly stated and why.
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Below are some algorithms for computing constant time operations that can be used and are meant to be examples.
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```go
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// conditionalMove returns x when i == 0 and y when i == 1
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func conditionalMove(x, y *[4]uint64, i int) {
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b := uint64(-i)
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x[0] ^= (x[0] ^ y[0]) & b
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x[1] ^= (x[1] ^ y[1]) & b
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x[2] ^= (x[2] ^ y[2]) & b
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x[3] ^= (x[3] ^ y[3]) & b
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}
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```
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```go
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// conditionalNegate negates x if i == 1, otherwise x is untouched
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func conditionalNegate(x *[4]uint64, i int) {
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b := uint64(-i)
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x[0] = (x[0] ^ b) - b
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x[1] = (x[1] ^ b) - b
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x[2] = (x[2] ^ b) - b
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x[3] = (x[3] ^ b) - b
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}
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```
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```go
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// conditionalAdd computes x+=y if i == 1, otherwise x is untouched
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func conditionalAdd(x, y *[4]uint64, i int) {
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b := uint64(-i)
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x[0] += y[0] & b
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x[1] += y[1] & b
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x[2] += y[2] & b
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x[3] += y[3] & b
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}
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```
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```go
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// conditionalSub computes x-=y if i == 1, otherwise x is untouched
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func conditionalSub(x, y *[4]uint64, i int) {
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b := uint64(-i)
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x[0] -= y[0] & b
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x[1] -= y[1] & b
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x[2] -= y[2] & b
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x[3] -= y[3] & b
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}
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```
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```go
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// isZero returns 1 if x is zero or 0 if non-zero
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func isZero(x *[4]uint64) int {
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t := x[0]
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t |= x[1]
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t |= x[2]
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t |= x[3]
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return int(((int64(t) | int64(-t)) >> 63) + 1)
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}
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```
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```go
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// isNonZero returns 1 if x is non-zero, 0 otherwise
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func isNonZero(x *[4]uint64) int {
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t := x[0]
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t |= x[1]
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t |= x[2]
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t |= x[3]
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return int(-((int64(t) | int64(-t)) >> 63))
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}
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```
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