const core = require('@actions/core'); const child_process = require('child_process'); const fs = require('fs'); const os = require('os'); const token = require('crypto').randomBytes(64).toString('hex'); const isWindows = (process.env['OS'] == 'Windows_NT'); try { const privateKey = core.getInput('ssh-private-key'); if (!privateKey) { core.setFailed("The ssh-private-key argument is empty. Maybe the secret has not been configured, or you are using a wrong secret name in your workflow file."); return; } var home; if (isWindows) { console.log('Preparing ssh-agent service on Windows'); child_process.execSync('sc config ssh-agent start=demand', { stdio: 'inherit' }); home = os.homedir(); } else { // Use getent() system call, since this is what ssh does; makes a difference in Docker-based // Action runs, where $HOME is different from the pwent var { homedir: home } = os.userInfo(); } const homeSsh = home + '/.ssh'; console.log(`Adding GitHub.com keys to ${homeSsh}/known_hosts`); fs.mkdirSync(homeSsh, { recursive: true }); fs.appendFileSync(`${homeSsh}/known_hosts`, '\ngithub.com ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==\n'); fs.appendFileSync(`${homeSsh}/known_hosts`, '\ngithub.com ssh-dss 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\n'); console.log("Starting ssh-agent"); const authSock = core.getInput('ssh-auth-sock'); let sshAgentOutput = '' if (authSock && authSock.length > 0) { sshAgentOutput = child_process.execFileSync('ssh-agent', ['-a', authSock]); } else { sshAgentOutput = child_process.execFileSync('ssh-agent') } // Extract auth socket path and agent pid and set them as job variables const lines = sshAgentOutput.toString().split("\n") for (const lineNumber in lines) { const matches = /^(SSH_AUTH_SOCK|SSH_AGENT_PID)=(.*); export \1/.exec(lines[lineNumber]) if (matches && matches.length > 0) { core.exportVariable(matches[1], matches[2]) } } console.log("Adding private keys to agent"); var keyNumber = 0; privateKey.split(/(?=-----BEGIN)/).forEach(function(key) { ++keyNumber; let keyFile = `${homeSsh}/key_${keyNumber}`; // Write private key (unencrypted!) to file console.log(`Write file ${keyFile}`); fs.writeFileSync(keyFile, key.replace("\r\n", "\n").trim() + "\n", { mode: '600' }); // Set private key passphrase let output = ''; try { console.log(`Set passphrase on ${keyFile}`); output = child_process.execFileSync('ssh-keygen', ['-p', '-f', keyFile, '-N', token]); } catch (exception) { fs.unlinkSync(keyFile); throw exception; } // Load key into agent if (isWindows) { child_process.execFileSync('ssh-add', [keyFile], { env: { ...process.env, ...{ 'DISPLAY': 'fake', 'SSH_PASS': token, 'SSH_ASKPASS': 'D:\\a\\ssh-agent\\ssh-agent\\askpass.exe' } } }); } else { child_process.execFileSync('ssh-add', [keyFile], { env: process.env, input: token }); } output.toString().split(/\r?\n/).forEach(function(key) { let parts = key.match(/^Key has comment '.*\bgithub\.com[:/]([_.a-z0-9-]+\/[_.a-z0-9-]+?)(?=\.git|\s|\')/); if (parts == null) { return; } let ownerAndRepo = parts[1]; child_process.execSync(`git config --global --replace-all url."git@key-${keyNumber}:${ownerAndRepo}".insteadOf "https://github.com/${ownerAndRepo}"`); child_process.execSync(`git config --global --add url."git@key-${keyNumber}:${ownerAndRepo}".insteadOf "git@github.com:${ownerAndRepo}"`); child_process.execSync(`git config --global --add url."git@key-${keyNumber}:${ownerAndRepo}".insteadOf "ssh://git@github.com/${ownerAndRepo}"`); // Use IdentitiesOnly=no due to https://github.com/PowerShell/Win32-OpenSSH/issues/1550 let sshConfig = `\nHost key-${keyNumber}\n` + ` HostName github.com\n` + ` User git\n` + ` IdentitiesOnly no\n` + ` IdentityFile ${keyFile}\n`; fs.appendFileSync(`${homeSsh}/config`, sshConfig); console.log(`Added deploy-key mapping: Use key #${keyNumber} for GitHub repository ${ownerAndRepo}`); }); }); console.log("Keys added:"); child_process.execSync('ssh-add -l', { stdio: 'inherit' }); } catch (error) { core.setFailed(error.message); }