{"record":{"id":"f1b4ecd4bdb4c4a5","repo":"tauri-apps/tauri","slug":"unable-to-generate-cryptographically-secure-keys-for-tauri","errorCode":null,"errorMessage":"unable to generate cryptographically secure keys for Tauri \"Isolation\" Pattern","messagePattern":"unable to generate cryptographically secure keys for Tauri \"Isolation\" Pattern","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"crates/tauri-codegen/src/context.rs","lineNumber":390,"sourceCode":"        if String::from_utf8_lossy(input).contains(\"__TAURI_ISOLATION_HOOK__\") {\n          sets_isolation_hook = true;\n        }\n        map_isolation(key, path, input, csp_hashes)\n      })?;\n\n      if !sets_isolation_hook {\n        panic!(\n          \"The isolation application does not contain a file setting the `window.__TAURI_ISOLATION_HOOK__` value.\"\n        );\n      }\n\n      let schema = options.isolation_schema;\n\n      quote!(#root::Pattern::Isolation {\n        assets: ::std::sync::Arc::new(#assets),\n        schema: #schema.into(),\n        key: #key.into(),\n        crypto_keys: std::boxed::Box::new(::tauri::utils::pattern::isolation::Keys::new().expect(\"unable to generate cryptographically secure keys for Tauri \\\"Isolation\\\" Pattern\")),\n      })\n    }\n  };\n\n  let acl_file_path = out_dir.join(ACL_MANIFESTS_FILE_NAME);\n  let acl: BTreeMap<String, Manifest> = if acl_file_path.exists() {\n    let acl_file =\n      std::fs::read_to_string(acl_file_path).expect(\"failed to read plugin manifest map\");\n    serde_json::from_str(&acl_file).expect(\"failed to parse plugin manifest map\")\n  } else {\n    Default::default()\n  };\n\n  let capabilities_file_path = out_dir.join(CAPABILITIES_FILE_NAME);\n  let capabilities_from_files = if capabilities_file_path.exists() {\n    let capabilities_json =\n      std::fs::read_to_string(&capabilities_file_path).expect(\"failed to read capabilities\");\n    serde_json::from_str(&capabilities_json).expect(\"failed to parse capabilities\")","sourceCodeStart":372,"sourceCodeEnd":408,"githubUrl":"https://github.com/tauri-apps/tauri/blob/460ec35447493200d64290dd7f015d5a91d0fd58/crates/tauri-codegen/src/context.rs#L372-L408","documentation":"This panic occurs at build time in tauri-codegen when generating the context code for the Tauri \"Isolation\" pattern. The generated code calls `tauri::utils::pattern::isolation::Keys::new()`, which generates a cryptographic keypair using the platform RNG; if that RNG fails or no secure randomness source is available, `.expect` panics with this message. The library treats failure to obtain secure keys as fatal because an Isolation pattern without strong keys is insecure.","triggerScenarios":"Building a Tauri app configured with `app.security.pattern.isolation` set in tauri.conf.json when `Keys::new()` cannot source cryptographically secure randomness from the OS (e.g. failing /dev/urandom, getrandom failing on the build platform).","commonSituations":"Cross-compiling or building in restricted environments (containers, chroots) where /dev/urandom or the system entropy API is unavailable; exotic targets where the getrandom backend is unsupported; heavily sandboxed CI runners.","solutions":["Fix the entropy source on the build machine (ensure /dev/urandom is available/accessible; check getrandom support for the target).","Retry the build in a normal environment (host with working OS RNG) instead of the restricted container.","If secure keys genuinely cannot be generated, temporarily disable the Isolation pattern in tauri.conf.json (`app.security.pattern` removed) while fixing the environment.","Update tauri-utils/getrandom to versions supporting your target platform."],"exampleFix":"// tauri.conf.json before\n\"security\": { \"pattern\": { \"use\": \"isolation\" } }\n// after (until entropy issue is fixed)\n\"security\": {}","handlingStrategy":"validation","validationCode":"// before enabling Isolation pattern in CI, sanity-check the RNG works:\n// run a tiny Rust probe using getrandom, or in shell:\ntest -c /dev/urandom && echo \"entropy OK\" || echo \"fix entropy before enabling isolation pattern\"","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Verify the build container exposes /dev/urandom before enabling the Isolation pattern","Test the build in the exact CI image once entropy-dependent features are added","Keep tauri-utils/getrandom updated for new target platforms","Only enable the Isolation pattern when your build environment supports secure RNG"],"tags":["build-time","cryptography","entropy","tauri","panic"],"backgroundTag":"module-init-failed","analyzedSha":"460ec35447493200d64290dd7f015d5a91d0fd58","analyzedAt":"2026-09-18T23:55:51.277Z","contentChangedAt":"2026-09-18T23:55:51.277Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}