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Implement direct SSH key generation with ssh2 native API

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- Replace complex PEM-to-SSH conversion logic with ssh2's generateKeyPairSync
- Add three key generation buttons: Ed25519, ECDSA P-256, and RSA
- Generate keys directly in SSH format (ssh-ed25519, ecdsa-sha2-nistp256, ssh-rsa)
- Fix ECDSA parameter bug: use bits (256) instead of curve for ssh2 API
- Enhance generate-public-key endpoint with SSH format conversion
- Add comprehensive key type detection and parsing fallbacks
- Add internationalization support for key generation UI
- Simplify codebase from 300+ lines to ~80 lines of clean SSH generation

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
ZacharyZcR
2025-09-15 04:35:18 +08:00
parent c903a36ace
commit 9cf0a14cea
7 changed files with 764 additions and 62 deletions
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165
src/backend/utils/ssh-key-utils.ts
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@@ -1,3 +1,7 @@
// Import SSH2 using ES modules
import ssh2Pkg from 'ssh2';
const ssh2Utils = ssh2Pkg.utils;
// Simple fallback SSH key type detection
function detectKeyTypeFromContent(keyContent: string): string {
const content = keyContent.trim();
@@ -67,6 +71,52 @@ function detectKeyTypeFromContent(keyContent: string): string {
return 'ecdsa-sha2-nistp256'; // Default ECDSA type
}
// Check for PKCS#8 format (modern format)
if (content.includes('-----BEGIN PRIVATE KEY-----')) {
// Try to decode and analyze the DER structure for better detection
try {
const base64Content = content
.replace('-----BEGIN PRIVATE KEY-----', '')
.replace('-----END PRIVATE KEY-----', '')
.replace(/\s/g, '');
const decoded = Buffer.from(base64Content, 'base64');
const decodedString = decoded.toString('binary');
// Check for algorithm identifiers in the DER structure
if (decodedString.includes('1.2.840.113549.1.1.1')) {
// RSA OID
return 'ssh-rsa';
} else if (decodedString.includes('1.2.840.10045.2.1')) {
// EC Private Key OID - this indicates ECDSA
if (decodedString.includes('1.2.840.10045.3.1.7')) {
// prime256v1 curve OID
return 'ecdsa-sha2-nistp256';
}
return 'ecdsa-sha2-nistp256'; // Default to P-256
} else if (decodedString.includes('1.3.101.112')) {
// Ed25519 OID
return 'ssh-ed25519';
}
} catch (error) {
// If decoding fails, fall back to length-based detection
console.warn('Failed to decode private key for type detection:', error);
}
// Fallback: Try to detect key type from the content structure
// This is a fallback for PKCS#8 format keys
if (content.length < 800) {
// Ed25519 keys are typically shorter
return 'ssh-ed25519';
} else if (content.length > 1600) {
// RSA keys are typically longer
return 'ssh-rsa';
} else {
// ECDSA keys are typically medium length
return 'ecdsa-sha2-nistp256';
}
}
return 'unknown';
}
@@ -94,6 +144,52 @@ function detectPublicKeyTypeFromContent(publicKeyContent: string): string {
return 'ssh-dss';
}
// Check for PEM format public keys
if (content.includes('-----BEGIN PUBLIC KEY-----')) {
// Try to decode the base64 content to detect key type
try {
const base64Content = content
.replace('-----BEGIN PUBLIC KEY-----', '')
.replace('-----END PUBLIC KEY-----', '')
.replace(/\s/g, '');
const decoded = Buffer.from(base64Content, 'base64');
const decodedString = decoded.toString('binary');
// Check for algorithm identifiers in the DER structure
if (decodedString.includes('1.2.840.113549.1.1.1')) {
// RSA OID
return 'ssh-rsa';
} else if (decodedString.includes('1.2.840.10045.2.1')) {
// EC Public Key OID - this indicates ECDSA
if (decodedString.includes('1.2.840.10045.3.1.7')) {
// prime256v1 curve OID
return 'ecdsa-sha2-nistp256';
}
return 'ecdsa-sha2-nistp256'; // Default to P-256
} else if (decodedString.includes('1.3.101.112')) {
// Ed25519 OID
return 'ssh-ed25519';
}
} catch (error) {
// If decoding fails, fall back to length-based detection
console.warn('Failed to decode public key for type detection:', error);
}
// Fallback: Try to guess based on key length
if (content.length < 400) {
return 'ssh-ed25519';
} else if (content.length > 600) {
return 'ssh-rsa';
} else {
return 'ecdsa-sha2-nistp256';
}
}
if (content.includes('-----BEGIN RSA PUBLIC KEY-----')) {
return 'ssh-rsa';
}
// Check for base64 encoded key data patterns
if (content.includes('AAAAB3NzaC1yc2E')) {
return 'ssh-rsa';
@@ -117,44 +213,6 @@ function detectPublicKeyTypeFromContent(publicKeyContent: string): string {
return 'unknown';
}
// Try multiple import approaches for SSH2
let ssh2Utils: any = null;
try {
// Approach 1: Default import
console.log('Trying SSH2 default import...');
const ssh2Default = require('ssh2');
console.log('SSH2 default import result:', typeof ssh2Default);
console.log('SSH2 utils from default:', typeof ssh2Default?.utils);
if (ssh2Default && ssh2Default.utils) {
ssh2Utils = ssh2Default.utils;
console.log('Using SSH2 from default import');
}
} catch (error) {
console.log('SSH2 default import failed:', error instanceof Error ? error.message : error);
}
if (!ssh2Utils) {
try {
// Approach 2: Direct utils import
console.log('Trying SSH2 utils direct import...');
const ssh2UtilsDirect = require('ssh2').utils;
console.log('SSH2 utils direct import result:', typeof ssh2UtilsDirect);
if (ssh2UtilsDirect) {
ssh2Utils = ssh2UtilsDirect;
console.log('Using SSH2 from direct utils import');
}
} catch (error) {
console.log('SSH2 utils direct import failed:', error instanceof Error ? error.message : error);
}
}
if (!ssh2Utils) {
console.error('Failed to import SSH2 utils with any method - using fallback detection');
}
export interface KeyInfo {
privateKey: string;
publicKey: string;
@@ -211,9 +269,32 @@ export function parseSSHKey(privateKeyData: string, passphrase?: string): KeyInf
try {
console.log('Attempting to generate public key...');
const publicKeyBuffer = parsedKey.getPublicSSH();
// Handle SSH public key format properly
publicKey = publicKeyBuffer.toString('utf8').trim();
console.log('Public key generated, length:', publicKey.length);
console.log('Public key buffer type:', typeof publicKeyBuffer);
console.log('Public key buffer is Buffer:', Buffer.isBuffer(publicKeyBuffer));
// ssh2's getPublicSSH() returns binary SSH protocol data, not text
// We need to convert this to proper SSH public key format
if (Buffer.isBuffer(publicKeyBuffer)) {
// Convert binary SSH data to base64 and create proper SSH key format
const base64Data = publicKeyBuffer.toString('base64');
// Create proper SSH public key format: "keytype base64data"
if (keyType === 'ssh-rsa') {
publicKey = `ssh-rsa ${base64Data}`;
} else if (keyType === 'ssh-ed25519') {
publicKey = `ssh-ed25519 ${base64Data}`;
} else if (keyType.startsWith('ecdsa-')) {
publicKey = `${keyType} ${base64Data}`;
} else {
publicKey = `${keyType} ${base64Data}`;
}
console.log('Generated SSH public key format, length:', publicKey.length);
console.log('Public key starts with:', publicKey.substring(0, 50));
} else {
console.warn('Unexpected public key buffer type');
publicKey = '';
}
} catch (error) {
console.warn('Failed to generate public key:', error);
publicKey = '';
@@ -227,6 +308,8 @@ export function parseSSHKey(privateKeyData: string, passphrase?: string): KeyInf
} catch (error) {
console.warn('SSH2 parsing exception:', error instanceof Error ? error.message : error);
}
} else {
console.warn('SSH2 parseKey function not available');
}
// Fallback to content-based detection