{"id":15698541,"url":"https://github.com/langston-barrett/czz","last_synced_at":"2025-05-07T08:25:43.685Z","repository":{"id":98471797,"uuid":"527643910","full_name":"langston-barrett/czz","owner":"langston-barrett","description":"Whole-program, Scheme-scriptable, multi-language, coverage-guided fuzzer","archived":false,"fork":false,"pushed_at":"2022-09-18T21:11:21.000Z","size":1995,"stargazers_count":6,"open_issues_count":41,"forks_count":0,"subscribers_count":3,"default_branch":"main","last_synced_at":"2025-03-31T08:07:23.658Z","etag":null,"topics":["fuzzing","scheme"],"latest_commit_sha":null,"homepage":"https://langston-barrett.github.io/czz/","language":"Haskell","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/langston-barrett.png","metadata":{"files":{"readme":"README.rst","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2022-08-22T16:24:53.000Z","updated_at":"2023-05-12T15:06:54.000Z","dependencies_parsed_at":"2023-06-01T21:45:24.821Z","dependency_job_id":null,"html_url":"https://github.com/langston-barrett/czz","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/langston-barrett%2Fczz","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/langston-barrett%2Fczz/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/langston-barrett%2Fczz/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/langston-barrett%2Fczz/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/langston-barrett","download_url":"https://codeload.github.com/langston-barrett/czz/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":252840956,"owners_count":21812393,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["fuzzing","scheme"],"created_at":"2024-10-03T19:29:38.787Z","updated_at":"2025-05-07T08:25:43.625Z","avatar_url":"https://github.com/langston-barrett.png","language":"Haskell","funding_links":[],"categories":[],"sub_categories":[],"readme":"===\nczz\n===\n\n..\n  This paragraph is duplicated in the README and index.rst.\n\nczz is a *whole-program*, *scriptable*, *multi-language*, coverage-guided\nfuzzer.\n\n*Whole-program*: Instead of feeding input to the target program via a file or\nstdin, czz executes target from ``main`` and provides it with manufactured data\nby intercepting calls to library functions like ``recv``, ``fopen``, and\n``rand``. This approach does not require users to write a fuzzing harness and\ncan exercise effectful, non-deterministic code that is not amenable to\ntraditional fuzzing techniques.\n\n*Scriptable*: czz can be scripted in Scheme. Capabilities include overriding\nthe behavior of functions in the target program, e.g., to :ref:`make a checksum\nfunction always pass \u003cchecksum\u003e`. Use-cases that `we plan to support in the\nfuture \u003chttps://github.com/langston-barrett/czz/issues/124\u003e`_ include writing\ncustom power schedules and mutations.\n\n*Multi-language*: czz currently targets languages that compile to LLVM (e.g.,\nC, C++, Rust, etc.), but is built on the language-agnostic `Crucible\n\u003chttps://github.com/GaloisInc/crucible\u003e`_ library, and also includes a\nproof-of-concept fuzzer for JVM code. Webassembly support is `planned\n\u003chttps://github.com/langston-barrett/czz/issues/109\u003e`_.\n\nSee the `documentation \u003chttps://langston-barrett.github.io/czz/\u003e`_ for more\ninformation about czz.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flangston-barrett%2Fczz","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flangston-barrett%2Fczz","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flangston-barrett%2Fczz/lists"}