{"record":{"id":"94522aa83ef3e39d","repo":"dotnet/maui","slug":"all-key-generation-methods-failed-unable-to-creat","errorCode":null,"errorMessage":"All key generation methods failed. Unable to create ADB keys.","messagePattern":"All key generation methods failed\\. Unable to create ADB keys\\.","errorType":"exception","errorClass":"Exception","httpStatus":null,"severity":"error","filePath":"eng/devices/android.cake","lineNumber":917,"sourceCode":"        keysGenerated = CreateAdbKeysUsingKeygen(adbKeyPath, adbKeyFile);\n\n\t\t// Option 2: Use automatic key generation by connecting to a device\n        if (!keysGenerated)\n        {\n            Information(\"Option 1 failed. Trying automatic key generation...\");\n            keysGenerated = CreateAdbKeysUsingAutomaticGeneration(settings, adbKeyFile, adbKeyPubFile);\n        }\n\t\t\n\t\t// Option 3: Use OpenSSL as fallback (if available)\n        if (!keysGenerated)\n        {\n            Information(\"Option 2 failed. Trying OpenSSL key generation...\");\n            keysGenerated = CreateAdbKeysUsingOpenSSL(adbKeyFile, adbKeyPubFile);\n        }\n        \n        if (!keysGenerated)\n        {\n            throw new Exception(\"All key generation methods failed. Unable to create ADB keys.\");\n        }\n        \n      \t// Verify keys were created\n        if (!System.IO.File.Exists(adbKeyFile) || !System.IO.File.Exists(adbKeyPubFile))\n        {\n            throw new Exception(\"ADB keys were not created successfully.\");\n        }\n\n        Information(\"ADB keys generated successfully!\");\n\n        // Set correct file permissions for ADB keys (Unix systems only)\n        if (IsRunningOnLinux())\n        {\n            Information(\"Setting correct permissions for ADB keys...\");\n            StartProcess(\"chmod\", $\"600 {adbKeyFile}\");\n            StartProcess(\"chmod\", $\"600 {adbKeyPubFile}\");\n        }\n","sourceCodeStart":899,"sourceCodeEnd":935,"githubUrl":"https://github.com/dotnet/maui/blob/f377ff1c5ee04d334d8a925f50c83a6b7afddf03/eng/devices/android.cake#L899-L935","documentation":"Thrown after three sequential ADB key-generation strategies all return false: (1) automatic generation, (2) CreateAdbKeysUsingAutomaticGeneration, and (3) CreateAdbKeysUsingOpenSSL fallback. ADB key pairs (adbkey/adbkey.pub) are needed to authorize the host with the emulator/device, and none of the available methods could produce them.","triggerScenarios":"All three key-generation methods return keysGenerated=false in sequence — neither the built-in automatic generator nor the OpenSSL fallback could write a valid RSA key pair to adbKeyFile/adbKeyPubFile.","commonSituations":"OpenSSL not installed or not on PATH (so the fallback fails); no write permission to the ~/.android directory; a locked-down container lacking keytool/openssl/ssh-keygen; disk full.","solutions":["Ensure openssl is installed and on PATH (`openssl version`), since it is the last-resort generator.","Check write permissions and free space in the ~/.android directory where adbkey files are written.","In minimal containers, install openssl and any required crypto libraries.","Pre-create the ~/.android directory and verify the adbKeyFile path is writable by the cake process."],"exampleFix":null,"handlingStrategy":"validation","validationCode":"// Pre-flight capability checks\nif (StartProcess(\"which\", new ProcessSettings { Arguments = \"openssl\", Silent = true, RedirectStandardOutput = true }) != 0)\n    Warning(\"openssl not found; ADB key generation may fail.\");\nif (!DirectoryExists(System.IO.Path.GetDirectoryName(adbKeyFile)))\n    CreateDirectory(System.IO.Path.GetDirectoryName(adbKeyFile));","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Install openssl in CI images as the reliable fallback generator.","Ensure ~/.android exists and is writable before key generation.","Log which generator returned false so the failing strategy is identifiable."],"tags":["android","adb","adb-keys","openssl","crypto","authorization"],"backgroundTag":null,"analyzedSha":"f377ff1c5ee04d334d8a925f50c83a6b7afddf03","analyzedAt":"2026-08-13T14:26:18.069Z","schemaVersion":2},"datasetVersion":"2026-08-13T19:17:28.613Z"}