commit 96a57204973edd1935cf32e0d02e58832c3d36b2 Author: robojerk Date: Tue Jun 3 12:07:38 2025 -0700 Initial commit diff --git a/ideas_on_why_fail.md b/ideas_on_why_fail.md new file mode 100644 index 0000000..a4ed5d2 --- /dev/null +++ b/ideas_on_why_fail.md @@ -0,0 +1,158 @@ +# Analysis of SSH Key Verification Failure + +## Observations from the Output + +1. **Key Generation** + - Successfully generated ED25519 key + - Key fingerprint: SHA256:k4SR6Pnp3se+9CzgZjnHYS+FAP/gyNHnbRB8s/Z1KC8 + - Public key was generated and displayed correctly + +2. **Verification Attempts** + - Three attempts were made with different tokens + - Each attempt followed the same process + - All attempts failed with the same error + - The signature format appears correct (has BEGIN/END markers) + +3. **Token Handling** + - Tokens were 64-character hex strings + - Each attempt used a fresh token + - Token format validation passed + +4. **Error Message Analysis** + - Forgejo reports: "The provided SSH key, signature or token do not match or token is out-of-date" + - This suggests either: + * The signature format is incorrect + * The token has expired + * There's a mismatch between the key and signature + * The signature includes extra data + +## Potential Issues + +1. **Signature Generation** + - The `echo -n` command might not be working as expected in PowerShell + - PowerShell's echo might be adding extra characters or line endings + - The signature might include the "Signing data on standard input" line + - The signature output might include debug/informational messages that should be filtered + +2. **Token Processing** + - The token might need to be processed differently (e.g., remove any whitespace) + - The token might need to be in a specific format (uppercase/lowercase) + - The token might need to be handled as raw bytes + +3. **SSH Key Format** + - The key might need to be in a specific format for Forgejo + - The key comment might be affecting the verification + - The key permissions might need to be set correctly + +4. **Forgejo Requirements** + - Forgejo might expect a specific signature format + - The namespace (-n forgejo_token) might need to be different + - The verification process might have changed in recent Forgejo versions + +## Prioritized Action Plan + +### 1. Verify echo -n Behavior (HIGHEST PRIORITY) +```powershell +# Test echo -n behavior in isolation +echo -n "test" | Format-Hex # Check for any trailing newlines (0A) +# Expected output should show only the hex for "test" without 0A at the end +``` + +### 2. Refine Signature Output Filtering (HIGHEST PRIORITY) +```powershell +# Test current output +$testToken = "a" * 64 # Create a dummy 64-char hex string +$testSignature = echo -n $testToken | ssh-keygen -Y sign -n forgejo_token -f "$privateKeyPath" 2>&1 +$testSignature | Measure-Object -Character -Line # Check character/line counts +$testSignature -match "Signing data on standard input" # See if the phrase is there + +# Implement filtering +$rawSignatureOutput = echo -n $Token | ssh-keygen -Y sign -n forgejo_token -f $privateKeyPath 2>&1 +$verificationOutput = ($rawSignatureOutput | Where-Object { + $_ -match '^(-----BEGIN SSH SIGNATURE-----|-----END SSH SIGNATURE-----|[A-Za-z0-9+/=]+)$' +} -join "`n").Trim() + +# Verify filtered output +$verificationOutput | Format-Hex # Check for any hidden characters +``` + +### 3. Manual Test Process (HIGH PRIORITY) +1. Get a fresh token from Forgejo +2. In a regular PowerShell window, run: + ```powershell + echo -n | ssh-keygen -Y sign -n forgejo_token -f ~/.ssh/id_ed25519 + ``` +3. Copy the output manually and paste into Forgejo +4. If this works, the issue is in the script's output handling +5. Compare the manual signature with the script-generated one + +### 4. Token Normalization (MEDIUM PRIORITY) +```powershell +# Add to token processing +$token = $token.Trim().ToLower() # Normalize token format +# Verify token format +$token | Format-Hex # Check for any hidden characters +``` + +### 5. Key Comment Test (MEDIUM PRIORITY) +1. Generate a new key without the comment: + ```powershell + ssh-keygen -t ed25519 -f $privateKeyPath # Remove -C $email + ``` +2. Try the verification process with the new key + +### 6. Alternative Token Passing Methods (LOW PRIORITY) +```powershell +# Option 1: Using temporary file +"$Token" | Out-File -FilePath temp_token.txt -Encoding ascii -NoNewline +$signature = ssh-keygen -Y sign -n forgejo_token -f $privateKeyPath < temp_token.txt 2>&1 +Remove-Item temp_token.txt + +# Option 2: Using stdin stream +$stdin = New-Object System.IO.StringReader($Token) +$signature = ssh-keygen -Y sign -n forgejo_token -f $privateKeyPath -InputObject $stdin 2>&1 +``` + +## Questions to Consider + +1. Does Forgejo provide any specific requirements for the signature format? +2. Are there any known issues with PowerShell's handling of binary data? +3. Should we try a different approach to passing the token to ssh-keygen? +4. Is there a way to verify the signature format before submitting it? +5. Could the key comment be causing issues with the verification? + +## Next Steps + +1. Verify `echo -n` behavior in isolation +2. Implement the signature output filtering +3. Perform the manual test to verify the basic process +4. Add token normalization +5. Test without key comment +6. If needed, try alternative token passing methods + +## Debugging Tips + +1. Use `Measure-Object` to check output lengths and line counts +2. Use `Format-Hex` to inspect for hidden characters +3. Compare manual vs. script-generated signatures +4. Check for any hidden characters in the output +5. Verify the exact format of the signature block +6. Monitor the token format throughout the process +7. Document the exact error message from Forgejo + +## Implementation Notes + +1. **Function Parameter Verification** + - Ensure `Get-SshSignature` receives correct `$privateKeyPath` + - Add parameter validation in the function + - Log the actual path being used + +2. **Output Inspection** + - Add debug logging for raw and filtered output + - Compare lengths and formats at each step + - Document any differences between manual and script output + +3. **Error Handling** + - Add specific error messages for each failure case + - Log the exact format of the signature being sent + - Document any differences from expected format diff --git a/readme.md b/readme.md new file mode 100644 index 0000000..236767d --- /dev/null +++ b/readme.md @@ -0,0 +1,44 @@ +This is a powershell script that will create a a ssh key +assume forgejo is installed (via docker) +ask for email address +run + +```powershell +echo "Please remember your passphrase. Write it down. Keep it safe" +ssh-keygen -t ed25519 -C "rraines@gmail.com" +``` + +These file are create +C:\Users\{user}\.ssh\id_ed25519 +C:\Users\{user}\.ssh\id_ed25519.pub + +Use cat ( or cat equivalent on powershell) to view "C:\Users\{user}\.ssh\id_ed25519.pub" + +```powershell +cls +# Copy the contents below +cat "C:\Users\{user}\.ssh\id_ed25519.pub" +``` + +Login to your forgejo web server +Click on your **profile avatar** (top right corner) +Select **"Settings"**. +In the left sidebar, click on **"SSH / GPG Keys"**. +Click the **"Add Key"** button. +Give your key a descriptive **"Title"** (e.g., "Rob's Laptop Key"). +Paste the entire public key into the "Content" text area. +After adding, you'll see your key listed. Click the **"Verify"** button next to it. +* Forgejo will provide a unique **challenge token** and three different commands. You need to run one of these commands in your local terminal. + +```powershell +echo "Please copy the token on the web page" +echo "for example c9fb7f60219b73d1819d9fe548a43e3a041484f8d7466dd212b4e8cde9e0e3d8" +``` + +set $TOKEN to what the user inputs +Verify that the inputted token matches the required parameters. i.e. length, no spaces etc + +run "cmd /c "&1 + } else { + Write-Host "`nGit Bash not found, using PowerShell..." -ForegroundColor Gray + # Use the exact PowerShell command format from Forgejo + $cmd = "cmd /c `&1 + } + + # Debug: Check raw output + Write-Host "`nDebug: Raw signature output:" -ForegroundColor Gray + $rawSignatureOutput | ForEach-Object { Write-Host " $_" -ForegroundColor Gray } + + # Filter the output to get only the signature block + $signatureLines = $rawSignatureOutput | Where-Object { + $_ -match '^(-----BEGIN SSH SIGNATURE-----|-----END SSH SIGNATURE-----|[A-Za-z0-9+/=]+)$' + } + + # Join the lines with newlines + $signature = [string]::Join("`n", $signatureLines).Trim() + + # Debug: Check filtered signature + Write-Host "`nDebug: Filtered signature:" -ForegroundColor Gray + $signature | ForEach-Object { Write-Host " $_" -ForegroundColor Gray } + + # Verify signature format + if (-not ($signature -match '^-----BEGIN SSH SIGNATURE-----\r?\n[A-Za-z0-9+/=]+\r?\n-----END SSH SIGNATURE-----\r?$')) { + Write-Host "Warning: Signature format may be incorrect" -ForegroundColor Yellow + } + + return $signature +} + +# --- SSH Key Generation --- + +# Get user's email for key comment +$email = "" +while (-not (Test-EmailFormat -Email $email)) { + $email = Read-Host "Please enter your email address for your SSH key comment" + if (-not (Test-EmailFormat -Email $email)) { + Write-Host "Invalid email format. Please try again." -ForegroundColor Red + } +} + +# Generate SSH key +Write-Host "`n--- Generating SSH Key ---" -ForegroundColor Cyan +Write-Host "You'll be prompted for a passphrase. Please remember it and keep it safe!" -ForegroundColor Yellow +$privateKeyPath = "$env:USERPROFILE\.ssh\id_ed25519" # Define private key path +$publicKeyPath = "$env:USERPROFILE\.ssh\id_ed25519.pub" # Define public key path + +# Check if key already exists to prevent accidental overwrite without warning +if (Test-Path $privateKeyPath) { + Write-Host "`nWarning: An SSH key already exists at '$privateKeyPath'." -ForegroundColor Yellow + $overwrite = Read-Host "Do you want to overwrite it? (Y/N)" + if ($overwrite -ne 'Y') { + Write-Host "Key generation cancelled. Exiting." -ForegroundColor Red + exit + } +} + +# Execute ssh-keygen +ssh-keygen -t ed25519 -C $email -f $privateKeyPath # Explicitly define path + +if ($LASTEXITCODE -ne 0) { + Write-Host "Error generating SSH key. Please check your SSH installation." -ForegroundColor Red + exit +} + +# Add key to SSH agent (optional) +Write-Host "`n--- Adding Key to SSH Agent (Optional) ---" -ForegroundColor Yellow +Write-Host "This avoids re-entering your passphrase. You might be prompted for your passphrase now." -ForegroundColor Yellow +ssh-add $privateKeyPath +if ($LASTEXITCODE -ne 0) { + Write-Host "Failed to add key to SSH agent. You may need to start the 'OpenSSH Authentication Agent' service manually." -ForegroundColor Red + Write-Host "To start the service manually, run: Start-Service ssh-agent" -ForegroundColor Yellow +} + +# Display the public key +Write-Host "`n--- Your Public Key ---" -ForegroundColor Green +Write-Host "Please copy the FOLLOWING ENTIRE KEY and paste it into Forgejo:" -ForegroundColor Green +Get-Content $publicKeyPath +Write-Host "---------------------------" -ForegroundColor Green + +# Show key fingerprint for verification +$keyFingerprint = (ssh-keygen -lf $publicKeyPath).Split(' ')[1] +Write-Host "`nKey Fingerprint (verify this matches in Forgejo):" -ForegroundColor Yellow +Write-Host $keyFingerprint -ForegroundColor Cyan +Write-Host "`nIMPORTANT: Make sure this fingerprint matches exactly in Forgejo!" -ForegroundColor Yellow +Write-Host "If it doesn't match, the key verification will fail." -ForegroundColor Yellow + +# --- Forgejo Web Server Instructions --- + +Write-Host "`n--- Next Steps (Manual on Forgejo Web Server) ---" -ForegroundColor Cyan +Write-Host "1. Login to your Forgejo web server (e.g., https://git.raines.xyz)" +Write-Host "2. Click on your profile avatar (top right corner)" +Write-Host "3. Select 'Settings'" +Write-Host "4. In the left sidebar, click on 'SSH / GPG Keys'" +Write-Host "5. Click the 'Add Key' button" +Write-Host "6. Give your key a descriptive 'Title' (e.g., 'My Laptop Key')" +Write-Host "7. PASTE the public key shown ABOVE into the 'Content' text area" +Write-Host "8. Click 'Add Key'." +Write-Host "9. After adding, verify that the fingerprint matches: $keyFingerprint" -ForegroundColor Yellow +Write-Host "10. Click the 'Verify' button next to your new key." +Write-Host "11. Copy the challenge token (the long hexadecimal string) provided by Forgejo." + +# --- Key Verification --- +$verificationPassed = $false +$maxAttempts = 3 +$attempts = 0 + +while (-not $verificationPassed -and $attempts -lt $maxAttempts) { + $attempts++ + + # Get and validate the token + $token = "" + while (-not (Test-TokenFormat -Token $token)) { + Write-Host "`n--- Key Verification (Attempt $attempts of $maxAttempts) ---" -ForegroundColor Yellow + Write-Host "Please get a fresh token from Forgejo (tokens expire after a few minutes)" -ForegroundColor Yellow + $token = Read-Host "Please paste the challenge token from Forgejo here:" + if (-not (Test-TokenFormat -Token $token)) { + Write-Host "Invalid token format. Token should be 64 hexadecimal characters." -ForegroundColor Red + } + } + + # Verify the token using the PowerShell command format provided by Forgejo + Write-Host "`nVerifying key with Forgejo...`n" -ForegroundColor Yellow + Write-Host "Running verification command using private key: $privateKeyPath" -ForegroundColor Yellow + Write-Host "--------------------------------------------------------" -ForegroundColor Yellow + + try { + # Generate signature using the function + $verificationOutput = Get-SshSignature -Token $token -PrivateKeyPath $privateKeyPath + if ($LASTEXITCODE -ne 0) { + throw "SSH key signing failed with exit code $LASTEXITCODE" + } + + Write-Host "`n--- Copy and Paste the Signature ---" -ForegroundColor Green + Write-Host "Please copy the FOLLOWING ENTIRE BLOCK (including BEGIN and END lines) and paste it back into the Forgejo web verification box:" -ForegroundColor Green + Write-Host "" # Add blank line before signature + $verificationOutput + Write-Host "" # Add blank line after signature + Write-Host "------------------------------------" -ForegroundColor Green + + Write-Host "`n--- Final Steps (Manual on Forgejo Web Server) ---" -ForegroundColor Cyan + Write-Host "12. Paste the signature above into the verification box in Forgejo." + Write-Host "13. Click 'Verify'. You should see 'Successfully verified'." + Write-Host "14. Once verified, you can now test your SSH connection to Forgejo." + + # Check verification status + Write-Host "`n--- Verification Status Check ---" -ForegroundColor Yellow + $verificationStatus = Read-Host "Did the verification pass in the Forgejo web interface? (Y/N)" + if ($verificationStatus -eq 'Y') { + $verificationPassed = $true + } else { + Write-Host "`nVerification failed. Here are some troubleshooting steps:" -ForegroundColor Red + Write-Host "1. Make sure you copied the ENTIRE signature block, including BEGIN and END lines" -ForegroundColor Yellow + Write-Host "2. Check that there are no extra spaces or line breaks in the signature" -ForegroundColor Yellow + Write-Host "3. Verify that the token was entered correctly" -ForegroundColor Yellow + Write-Host "4. The token may have expired - get a fresh token from Forgejo" -ForegroundColor Yellow + Write-Host "5. Try again with a new token" -ForegroundColor Yellow + + if ($attempts -lt $maxAttempts) { + Write-Host "`nLet's try again with a new token..." -ForegroundColor Yellow + } else { + Write-Host "`nMaximum verification attempts reached. Please check your key and try again later." -ForegroundColor Red + exit + } + } + } + catch { + Write-Host "Error during verification: $_" -ForegroundColor Red + Write-Host "Output: $verificationOutput" -ForegroundColor Red + if ($attempts -lt $maxAttempts) { + Write-Host "`nLet's try again with a new token..." -ForegroundColor Yellow + } else { + Write-Host "`nMaximum verification attempts reached. Please check your key and try again later." -ForegroundColor Red + exit + } + } +} + +# --- SSH Config Setup --- +Write-Host "`n--- SSH Config Setup (Optional) ---" -ForegroundColor Yellow +$setupConfig = Read-Host "Would you like to set up your SSH config for easier connections? (Y/N)" +if ($setupConfig -eq 'Y') { + $forgejoHost = Read-Host "Enter your Forgejo hostname (e.g., git.raines.xyz)" + $forgejoUser = Read-Host "Enter your Forgejo username" + + $sshConfigPath = "$env:USERPROFILE\.ssh\config" + # Convert Windows path to forward slashes for SSH config + $sshPrivateKeyPath = $privateKeyPath.Replace('\', '/') + $configContent = @" + +# Forgejo Configuration +Host $forgejoHost + HostName $forgejoHost + User $forgejoUser + IdentityFile $sshPrivateKeyPath + PreferredAuthentications publickey + PubkeyAuthentication yes + PasswordAuthentication no +"@ + + # Create .ssh directory if it doesn't exist + if (-not (Test-Path "$env:USERPROFILE\.ssh")) { + New-Item -ItemType Directory -Path "$env:USERPROFILE\.ssh" | Out-Null + } + + # Check if config file exists and has duplicate entries + if (Test-Path $sshConfigPath) { + Write-Host "`nChecking for existing SSH config entries..." -ForegroundColor Yellow + $existingConfig = Get-Content $sshConfigPath + $hasDuplicate = $existingConfig -match "Host $forgejoHost" + + if ($hasDuplicate.Count -gt 1) { + Write-Host "Found duplicate entries for $forgejoHost. Cleaning up config file..." -ForegroundColor Yellow + # Create backup of existing config + $backupPath = "$sshConfigPath.backup" + Copy-Item $sshConfigPath $backupPath + Write-Host "Created backup at: $backupPath" -ForegroundColor Yellow + + # Remove all existing entries for this host + $newConfig = $existingConfig | Where-Object { + -not ($_ -match "Host $forgejoHost" -or + ($_ -match "^\s+(HostName|User|IdentityFile|PreferredAuthentications|PubkeyAuthentication|PasswordAuthentication)" -and + $existingConfig[$existingConfig.IndexOf($_) - 1] -match "Host $forgejoHost")) + } + + # Add new config + $newConfig += $configContent + Set-Content -Path $sshConfigPath -Value $newConfig + Write-Host "Updated SSH config with clean entry for $forgejoHost" -ForegroundColor Green + } else { + # No duplicates, just append + Add-Content -Path $sshConfigPath -Value $configContent + Write-Host "Added new SSH config entry for $forgejoHost" -ForegroundColor Green + } + } else { + # Create new config file + Set-Content -Path $sshConfigPath -Value $configContent + Write-Host "Created new SSH config file with entry for $forgejoHost" -ForegroundColor Green + } + + Write-Host "`nSSH config has been updated. You can now connect using:" -ForegroundColor Green + Write-Host "ssh $forgejoHost" -ForegroundColor Cyan + Write-Host "`nYour SSH config is located at: $sshConfigPath" -ForegroundColor Yellow + + # Wait a moment for the key to be fully processed + Write-Host "`nWaiting a moment for the key to be fully processed..." -ForegroundColor Yellow + Start-Sleep -Seconds 5 + + # Test the connection with verbose output + Write-Host "`n--- Testing SSH Connection ---" -ForegroundColor Yellow + Write-Host "Testing connection to $forgejoHost with verbose output..." -ForegroundColor Yellow + $testConnection = ssh -v -T $forgejoHost 2>&1 + if ($LASTEXITCODE -eq 1) { + # Exit code 1 is actually success for SSH test connections + Write-Host "Connection successful! You can now use Git with your Forgejo repository." -ForegroundColor Green + } else { + Write-Host "Connection test failed. Here are some troubleshooting steps:" -ForegroundColor Red + Write-Host "1. Verify that your SSH key is properly added to your Forgejo account:" -ForegroundColor Yellow + Write-Host " - Check that the key appears in your SSH keys list" -ForegroundColor Yellow + Write-Host " - Verify that the key fingerprint matches: $((ssh-keygen -lf $publicKeyPath).Split(' ')[1])" -ForegroundColor Yellow + Write-Host "2. Check your SSH config:" -ForegroundColor Yellow + Write-Host " - Verify the hostname is correct: $forgejoHost" -ForegroundColor Yellow + Write-Host " - Verify the username is correct: $forgejoUser" -ForegroundColor Yellow + Write-Host " - Check that the key path is correct: $sshPrivateKeyPath" -ForegroundColor Yellow + Write-Host "3. Try connecting manually with verbose output:" -ForegroundColor Yellow + Write-Host " ssh -v -T $forgejoUser@$forgejoHost" -ForegroundColor Cyan + Write-Host "`nError output:" -ForegroundColor Red + $testConnection | ForEach-Object { Write-Host " $_" -ForegroundColor Red } + } +} else { + # If user didn't set up SSH config, still offer to test connection + Write-Host "`n--- Testing SSH Connection ---" -ForegroundColor Yellow + $testConnection = Read-Host "Would you like to test your SSH connection now? (Y/N)" + if ($testConnection -eq 'Y') { + $forgejoHost = Read-Host "Enter your Forgejo hostname (e.g., git.raines.xyz)" + $forgejoUser = Read-Host "Enter your Forgejo username" + Write-Host "`nTesting connection to $forgejoUser@$forgejoHost with verbose output..." -ForegroundColor Yellow + $testResult = ssh -v -T "$forgejoUser@$forgejoHost" 2>&1 + if ($LASTEXITCODE -eq 1) { + Write-Host "Connection successful! You can now use Git with your Forgejo repository." -ForegroundColor Green + } else { + Write-Host "Connection test failed. Here are some troubleshooting steps:" -ForegroundColor Red + Write-Host "1. Verify that your SSH key is properly added to your Forgejo account:" -ForegroundColor Yellow + Write-Host " - Check that the key appears in your SSH keys list" -ForegroundColor Yellow + Write-Host " - Verify that the key fingerprint matches: $((ssh-keygen -lf $publicKeyPath).Split(' ')[1])" -ForegroundColor Yellow + Write-Host "2. Try connecting manually with verbose output:" -ForegroundColor Yellow + Write-Host " ssh -v -T $forgejoUser@$forgejoHost" -ForegroundColor Cyan + Write-Host "`nError output:" -ForegroundColor Red + $testResult | ForEach-Object { Write-Host " $_" -ForegroundColor Red } + } + } +} + +Write-Host "`nProcess for SSH key setup and verification completed!" -ForegroundColor Green