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feat: Add 60+ SSH config field support with enhanced UI (#50)
This commit is contained in:
Pei-Tang Huang
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// Copyright 2025.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ui
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// SSHFieldDefaults contains the default values for all SSH configuration fields
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// This centralizes all default values to ensure consistency across the application
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var SSHFieldDefaults = map[string]string{
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// Basic fields
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"Port": "22",
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"User": "", // Empty means current username (OpenSSH default)
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// Connection fields
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"ConnectTimeout": "", // none (system default)
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"ConnectionAttempts": "1",
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"IPQoS": "af21 cs1",
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"BatchMode": "no",
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"Compression": "no",
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"AddressFamily": "any",
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"RequestTTY": "auto",
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"SessionType": "default",
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// Proxy fields
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"ProxyJump": "", // none
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"ProxyCommand": "", // none
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"RemoteCommand": "", // none
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// Port forwarding fields
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"LocalForward": "", // none
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"RemoteForward": "", // none
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"DynamicForward": "", // none
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"ForwardAgent": "no",
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"ForwardX11": "no",
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"ForwardX11Trusted": "no",
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"ClearAllForwardings": "no",
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"ExitOnForwardFailure": "no",
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"GatewayPorts": "no",
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// Authentication fields
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"PubkeyAuthentication": "yes",
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"PasswordAuthentication": "yes",
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"PreferredAuthentications": "gssapi-with-mic,hostbased,publickey,keyboard-interactive,password",
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"IdentitiesOnly": "no",
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"AddKeysToAgent": "no",
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"IdentityAgent": "SSH_AUTH_SOCK",
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"KbdInteractiveAuthentication": "yes",
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"NumberOfPasswordPrompts": "3",
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"PubkeyAcceptedAlgorithms": "", // all supported
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"HostbasedAcceptedAlgorithms": "", // all supported
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// Multiplexing fields
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"ControlMaster": "no",
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"ControlPath": "", // none
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"ControlPersist": "no",
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// Keep-alive fields
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"ServerAliveInterval": "0", // disabled
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"ServerAliveCountMax": "3",
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"TCPKeepAlive": "yes",
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// Security fields
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"StrictHostKeyChecking": "ask",
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"UserKnownHostsFile": "~/.ssh/known_hosts",
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"HostKeyAlgorithms": "", // default algorithms
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"Ciphers": "", // default ciphers
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"MACs": "", // default MACs
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"CheckHostIP": "no",
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"FingerprintHash": "SHA256", // OpenSSH uses uppercase SHA256
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"VerifyHostKeyDNS": "no",
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"UpdateHostKeys": "no",
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"HashKnownHosts": "no",
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"VisualHostKey": "no",
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// Cryptography fields
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"KexAlgorithms": "", // all supported
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// Hostname canonicalization fields
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"CanonicalizeHostname": "no",
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"CanonicalDomains": "", // none
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"CanonicalizeFallbackLocal": "yes",
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"CanonicalizeMaxDots": "1",
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"CanonicalizePermittedCNAMEs": "", // none
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// Command execution fields
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"LocalCommand": "", // none
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"PermitLocalCommand": "no",
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"EscapeChar": "~",
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// Environment fields
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"SendEnv": "", // none
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"SetEnv": "", // none
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// Debugging fields
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"LogLevel": "INFO",
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// Bind options
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"BindAddress": "", // none
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"BindInterface": "", // none
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}
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// GetSSHFieldDefault returns the default value for a given SSH field
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// Returns empty string if no default is defined
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func GetSSHFieldDefault(fieldName string) string {
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if value, exists := SSHFieldDefaults[fieldName]; exists {
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return value
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}
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return ""
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}
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// GetSSHFieldDefaultWithFallback returns the default value for a given SSH field
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// with a fallback value if no default is defined
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func GetSSHFieldDefaultWithFallback(fieldName, fallback string) string {
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if value, exists := SSHFieldDefaults[fieldName]; exists {
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return value
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}
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return fallback
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}
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// GetFieldPlaceholder returns an appropriate placeholder for a form field
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// It returns either the default value, an example, or an empty string
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//
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//nolint:gocyclo // This is a simple switch statement for field-specific placeholders
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func GetFieldPlaceholder(fieldName string) string {
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defaultValue := GetSSHFieldDefault(fieldName)
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switch fieldName {
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// Required fields
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case "Alias", "Host":
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return "required"
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// Fields that show default value in placeholder
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case "Port":
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return "default: " + defaultValue
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case "User":
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return "default: current username"
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case "ConnectTimeout":
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if defaultValue == "" {
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return "seconds (default: none)"
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}
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return "default: " + defaultValue + " seconds"
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case "ConnectionAttempts":
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return "default: " + defaultValue
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case "ServerAliveInterval":
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if defaultValue == "0" {
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return "seconds (default: 0)"
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}
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return "default: " + defaultValue + " seconds"
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case "ServerAliveCountMax":
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return "default: " + defaultValue
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case "NumberOfPasswordPrompts":
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return "default: " + defaultValue
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case "CanonicalizeMaxDots":
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return "default: " + defaultValue
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case "IPQoS":
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return "default: " + defaultValue
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case "EscapeChar":
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return "default: " + defaultValue
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case "IdentityAgent":
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if defaultValue != "" {
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return "default: " + defaultValue
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}
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return "default: SSH_AUTH_SOCK"
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case "UserKnownHostsFile":
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if defaultValue != "" {
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return "default: " + defaultValue
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}
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return "default: ~/.ssh/known_hosts"
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// Fields that show examples in placeholder
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case "Keys":
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return "e.g., ~/.ssh/id_rsa, ~/.ssh/id_ed25519"
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case "Tags":
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return "comma-separated tags"
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case "ProxyJump": //nolint:goconst // Field name used in switch case
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return "e.g., bastion.example.com"
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case "ProxyCommand":
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return "e.g., ssh -W %h:%p jump.example.com"
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case "RemoteCommand":
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return "e.g., tmux attach"
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case "LocalForward":
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return "e.g., 8080:localhost:80, 3000:localhost:3000"
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case "RemoteForward":
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return "e.g., 80:localhost:8080"
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case "DynamicForward":
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return "e.g., 1080, 1081"
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case "ControlPath":
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return "e.g., ~/.ssh/master-%r@%h:%p"
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case "ControlPersist":
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return "e.g., 10m, 4h, yes, no"
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case "PreferredAuthentications":
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return "e.g., publickey,password"
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case "PubkeyAcceptedAlgorithms", "HostbasedAcceptedAlgorithms",
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"HostKeyAlgorithms", "Ciphers", "MACs", "KexAlgorithms":
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return "algorithms (+/-/^ prefix supported)"
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case "BindAddress":
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return "IP, hostname, * (all), or localhost"
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case "CanonicalDomains":
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return "e.g., example.com, internal.net"
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case "CanonicalizePermittedCNAMEs":
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return "e.g., *.example.com:example.net"
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case "LocalCommand":
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return "e.g., echo 'Connected to %h'"
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case "SendEnv":
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return "e.g., LANG, LC_*, TERM"
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case "SetEnv":
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return "e.g., FOO=bar, DEBUG=1"
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// Fields with no placeholder
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default:
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return ""
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}
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}
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