{"record":{"id":"b01612a29f8e48d9","repo":"tauri-apps/tauri","slug":"unable-to-extract-private-key","errorCode":null,"errorMessage":"Unable to extract private key","messagePattern":"Unable to extract private key","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/tauri-cli/src/signer/sign.rs","lineNumber":77,"sourceCode":"\n  options.private_key_path = options.private_key_path.or_else(|| {\n    get_env(\"TAURI_PRIVATE_KEY_PATH\", \"TAURI_SIGNING_PRIVATE_KEY_PATH\").map(PathBuf::from)\n  });\n\n  options.password = options.password.or_else(|| {\n    get_env(\n      \"TAURI_PRIVATE_KEY_PASSWORD\",\n      \"TAURI_SIGNING_PRIVATE_KEY_PASSWORD\",\n    )\n  });\n  options\n}\n\npub fn command(mut options: Options) -> Result<()> {\n  options = backward_env_vars(options);\n\n  options.private_key = if let Some(private_key) = options.private_key_path {\n    Some(std::fs::read_to_string(Path::new(&private_key)).expect(\"Unable to extract private key\"))\n  } else {\n    options.private_key\n  };\n  let private_key = if let Some(pk) = options.private_key {\n    pk\n  } else {\n    crate::error::bail!(\"Key generation aborted: Unable to find the private key\");\n  };\n\n  if options.password.is_none() {\n    println!(\"Signing without password.\");\n  }\n\n  let (manifest_dir, signature) =\n    sign_file(&secret_key(private_key, options.password)?, options.file)\n      .with_context(|| \"failed to sign file\")?;\n\n  println!(","sourceCodeStart":59,"sourceCodeEnd":95,"githubUrl":"https://github.com/tauri-apps/tauri/blob/52e4b6e71d8632a7e648f866c442e287ecddee34/crates/tauri-cli/src/signer/sign.rs#L59-L95","documentation":"Thrown by the Tauri CLI signer (crates/tauri-cli/src/signer/sign.rs) when it cannot load the updater signing key from disk. Despite the wording, it is not a key-format failure: std::fs::read_to_string(private_key).expect(\"Unable to extract private key\") panics on any IO error while reading the file given via options.private_key_path — file missing, unreadable, a directory, or containing non-UTF-8 bytes.","triggerScenarios":"Running `tauri signer sign` (or a build with updater signing configured) with --private-key-path / tauri.conf.json `bundle > signer > privateKeyPath` pointing to a nonexistent path, a file the current user cannot read, a directory, or a non-UTF-8 file; also relative paths resolved from a different working directory than expected.","commonSituations":"Key generated with `tauri signer generate -w ~/.tauri/myapp.key` but sign invoked from another directory with a relative path; CI runners where the secret key file was never written; key file owned by another user (permission denied); placeholder path left in config after switching machines.","solutions":["Verify the path exists and is readable by the invoking user: `ls -l <path>`; if missing, generate a key with `tauri signer generate -w ~/.tauri/<app>.key`","Use an absolute path for --private-key-path / privateKeyPath, or a path relative to the directory where the CLI actually runs","Prefer the environment variable: export TAURI_SIGNING_PRIVATE_KEY (older releases accepted TAURI_PRIVATE_KEY) with the key contents so no file read happens","If the file exists, confirm it is valid UTF-8 text and has restrictive but readable permissions (e.g. chmod 400 owned by the build user)"],"exampleFix":"# before\ntauri signer sign --private-key-path ./release.key dist/app.tar.gz\n# thread panicked: Unable to extract private key\n\n# after\ntest -r \"$HOME/.tauri/release.key\" || tauri signer generate -w \"$HOME/.tauri/release.key\"\ntauri signer sign --private-key-path \"$HOME/.tauri/release.key\" dist/app.tar.gz","handlingStrategy":"validation","validationCode":"#!/usr/bin/env bash\nKEY=\"${TAURI_SIGNING_PRIVATE_KEY_PATH:?signing key path not set}\"\n[ -r \"$KEY\" ] || { echo \"signing key missing/unreadable: $KEY\" >&2; exit 1; }\ntauri signer sign --private-key-path \"$KEY\" \"$1\"","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Store the key at a fixed absolute path and reference it absolutely in config and CI","Prefer the TAURI_SIGNING_PRIVATE_KEY environment variable in CI so no file read can fail","Add a pre-flight existence/permission check in every release script before invoking tauri signer","Keep the key file plain UTF-8; never write it through tools that emit BOMs"],"tags":["cli","signing","updater","key-file"],"backgroundTag":"missing-signing-key-file","analyzedSha":"52e4b6e71d8632a7e648f866c442e287ecddee34","analyzedAt":"2026-08-20T13:59:20.734Z","contentChangedAt":"2026-08-20T13:59:20.734Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}