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h z
2025-05-04 19:11:12 +01:00
parent fc4ef3b0f8
commit 58d9c333e0
10 changed files with 332 additions and 178 deletions
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6
Alchegos.MCP.csproj
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@@ -7,13 +7,17 @@
<ImplicitUsings>enable</ImplicitUsings>
<DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Alchegos.Core" Version="0.0.1" />
<PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.0-preview.3.25171.5" />
<PackageReference Include="ModelContextProtocol" Version="0.1.0-preview.11" />
<PackageReference Include="ModelContextProtocol.AspNetCore" Version="0.1.0-preview.11" />
</ItemGroup>
<ItemGroup>
<None Include="NuGet.Config" />
</ItemGroup>
</Project>

13
Dockerfile
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@@ -5,6 +5,7 @@ WORKDIR /app
FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
ARG BUILD_CONFIGURATION=Release
WORKDIR /src
COPY NuGet.Config ./
COPY ["*.sln", "."]
COPY ["Alchegos.MCP.csproj", "./"]
RUN dotnet restore "Alchegos.MCP.csproj"
@@ -19,4 +20,14 @@ RUN dotnet publish "./Alchegos.MCP.csproj" -c $BUILD_CONFIGURATION -o /app/publi
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "Alchegos.MCP.dll"]
USER root
RUN apt-get update
RUN apt-get install -y --no-install-recommends openssh-client openssh-server
RUN rm -rf /var/lib/apt/lists/*
RUN mkdir -p /var/run/sshd
RUN sed -i 's/#PermitRootLogin.*/PermitRootLogin yes/' /etc/ssh/sshd_config
RUN sed -i 's/#PasswordAuthentication.*/PasswordAuthentication yes/' /etc/ssh/sshd_config
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

51
Middleware/RequestBodyLoggingMiddleware.cs Normal file
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@@ -0,0 +1,51 @@
using System.Text;
namespace Alchegos.MCP.Middleware
{
public class RequestBodyLoggingMiddleware
{
private readonly RequestDelegate _next;
private readonly ILogger _logger;
public RequestBodyLoggingMiddleware(RequestDelegate next, ILogger<RequestBodyLoggingMiddleware> logger)
{
_next = next;
_logger = logger;
}
public async Task InvokeAsync(HttpContext context)
{
if (context.Request.Method == HttpMethods.Post && context.Request.ContentLength > 0)
{
context.Request.EnableBuffering();
using var reader = new StreamReader(
context.Request.Body,
encoding: Encoding.UTF8,
detectEncodingFromByteOrderMarks: false,
bufferSize: 4096,
leaveOpen: true);
var requestBody = await reader.ReadToEndAsync();
context.Request.Body.Position = 0;
_logger.LogTrace("Request Body (POST {RequestPath}):\n{RequestBody}", context.Request.Path, requestBody);
}
await _next(context);
}
}
}
namespace Microsoft.AspNetCore.Builder
{
public static class RequestBodyLoggingMiddlewareExtensions
{
public static IApplicationBuilder UseRequestBodyLogging(
this IApplicationBuilder builder)
{
return builder.UseMiddleware<Alchegos.MCP.Middleware.RequestBodyLoggingMiddleware>();
}
}
}

7
NuGet.Config Normal file
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@@ -0,0 +1,7 @@
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<packageSources>
<add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
<add key="hangman-lab" value="https://git.hangman-lab.top/api/packages/hzhang/nuget/index.json" />
</packageSources>
</configuration>

24
Program.cs
View File

@@ -1,29 +1,19 @@
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using ModelContextProtocol.Server;
using System.ComponentModel;
using System.Diagnostics;
using Alchegos.MCP.Tools;
var builder = WebApplication.CreateBuilder(args);
const int BIND_PORT = 5050;
builder.Services
.AddMcpServer()
.WithHttpTransport()
.WithToolsFromAssembly();
builder.WebHost.ConfigureKestrel(options => options.ListenAnyIP(5050));
builder.WebHost.ConfigureKestrel(options => options.ListenAnyIP(BIND_PORT));
//builder.Services.AddHttpLogging(o => { });
var app = builder.Build();
// var logger = app.Logger;
//app.UseHttpLogging();
app.UseRequestBodyLogging();
app.MapMcp();
app.Run();
[McpServerToolType]
public static class EchoTool
{
[McpServerTool, Description("Echoes the message back to the client.")]
public static string Echo(string message) => $"hello {message}";
}

12
Tools/GiteaTool.cs
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@@ -1,8 +1,18 @@
using ModelContextProtocol.Server;
using Alchegos.Core.Services.Gitea;
namespace Alchegos.MCP.Tools;
[McpServerToolType]
public static class GiteaTool
{
public static string Login(string a)
{
throw new NotImplementedException();
}
public static string GetGiteaRepoList(string apiKey)
{
throw new NotImplementedException();
}
}

239
Tools/TerminalTool.cs
View File

@@ -6,60 +6,52 @@ using System.Text.RegularExpressions;
using ModelContextProtocol.Server;
namespace Alchegos.MCP.Tools;
[McpServerToolType, Description("Manage multiple persistent terminal sessions, enabling creation, closure, command execution, and output retrieval.")]
[McpServerToolType, Description("""
Manages multiple persistent terminal sessions.
**Sessions are identified and operated on using their unique `sessionId`. The `label` is for human reference only.**
Enables creation, closure, command execution, and output retrieval.
""")]
public static class TerminalTool
{
private static readonly ConcurrentDictionary<string, TerminalSession> _sessions = new();
public record SessionInfo(
[property: Description("Unique identifier for the session.")] string SessionId,
[property: Description("Human-readable label for the session.")] string Label
[property: Description("Unique identifier (`sessionId`) for the session. **This ID is required for all operations targeting this specific session (e.g., sending input, exiting).**")] string SessionId,
[property: Description("Human-readable label for the session. **This is for display and organizational purposes only and CANNOT be used to interact with the session via subsequent tool calls.**")] string Label
);
public record ListSessionsResult(
[property: Description("List of all active sessions with their IDs and labels.")] List<SessionInfo> Sessions
[property: Description("List of all active sessions, including their `sessionId` and `label`. **Use the `sessionId` from this list for interacting with a specific session in other tool calls.**")] List<SessionInfo> Sessions
);
public record CreateSessionResult(
[property: Description("Status of the operation: 'success' or 'fail'.")] string Status,
[property: Description("Details of the created session if successful; otherwise, with empty fields.")] SessionInfo Session
);
public record ExitSessionResult(
[property: Description("Status of the operation: 'success' or 'fail'.")] string Status
);
public record SendSignalResult(
[property: Description("Status of the operation: 'success' or 'fail'.")] string Status
);
public record SendInputWithExceptResult(
[property: Description("Indicates how the response was triggered: 'except' when a regex matched, or 'timeout' when the timeout was reached.")] string OutputBy,
[property: Description("The regex pattern that matched, or null if none matched before timeout.")] string? MatchedExcept,
[property: Description("Accumulated standard output from the session after sending input.")] string Stdout,
[property: Description("Accumulated standard error from the session after sending input.")] string Stderr
);
public record SendInputAndForgetResult(
[property: Description("Status of the operation: 'success' or 'fail'.")] string Status
);
public record OneOffCommandResult(
[property: Description("How the command completed: 'finish' when the process exited normally, or 'timeout' when the timeout was reached.")] string ReturnBy,
[property: Description("How the command completed: 'finish' when the process exited normally, or 'timeout' when the timeout was reached. 'error' otherwise")] string ReturnBy,
[property: Description("Standard output produced by the command.")] string Stdout,
[property: Description("Standard error produced by the command.")] string Stderr
);
public record GetCachedResultResult(
[property: Description("Cached standard output of the session.")] string Stdout,
[property: Description("Cached standard error of the session.")] string Stderr
);
public record ClearResult(
[property: Description("Status of the operation: 'success' or 'fail'.")] string Status
);
private class TerminalSession : IDisposable
{
public string Id { get; }
@@ -68,15 +60,13 @@ public static class TerminalTool
private readonly StringBuilder _stdoutBuffer = new();
private readonly StringBuilder _stderrBuffer = new();
private readonly object _lockObject = new();
private readonly Lock _lockObject = new();
private bool _isDisposed;
public TerminalSession(string id, string label)
{
Id = id;
Label = label;
Process = new Process
{
StartInfo = new ProcessStartInfo
@@ -95,23 +85,19 @@ public static class TerminalTool
Process.OutputDataReceived += (sender, e) =>
{
if (e.Data != null)
{
lock (_lockObject)
{
_stdoutBuffer.AppendLine(e.Data);
}
}
};
Process.ErrorDataReceived += (sender, e) =>
{
if (e.Data != null)
{
lock (_lockObject)
{
_stderrBuffer.AppendLine(e.Data);
}
}
};
Process.Start();
@@ -166,10 +152,8 @@ public static class TerminalTool
{
string stdout = _stdoutBuffer.ToString();
string stderr = _stderrBuffer.ToString();
_stdoutBuffer.Clear();
_stderrBuffer.Clear();
return (stdout, stderr);
}
}
@@ -195,16 +179,13 @@ public static class TerminalTool
{
if (_isDisposed)
return;
_isDisposed = true;
try
{
if (!Process.HasExited)
{
Process.StandardInput.WriteLine("exit");
Process.StandardInput.Flush();
if (!Process.WaitForExit(1000))
Process.Kill();
}
@@ -228,10 +209,8 @@ public static class TerminalTool
{
if (process.HasExited)
return false;
if (!AttachConsole((uint)process.Id))
return false;
SetConsoleCtrlHandler(null, true);
try
{
@@ -264,11 +243,9 @@ public static class TerminalTool
UseShellExecute = false,
CreateNoWindow = true
});
killProcess?.WaitForExit();
return killProcess?.ExitCode == 0;
}
return false;
}
catch
@@ -277,7 +254,6 @@ public static class TerminalTool
}
}
// Windows Console API imports
[System.Runtime.InteropServices.DllImport("kernel32.dll")]
public static extern bool AttachConsole(uint dwProcessId);
@@ -285,7 +261,7 @@ public static class TerminalTool
public static extern bool FreeConsole();
[System.Runtime.InteropServices.DllImport("kernel32.dll")]
public static extern bool SetConsoleCtrlHandler(ConsoleCtrlHandler? HandlerRoutine, bool Add);
public static extern bool SetConsoleCtrlHandler(ConsoleCtrlHandler? handlerRoutine, bool add);
[System.Runtime.InteropServices.DllImport("kernel32.dll")]
public static extern bool GenerateConsoleCtrlEvent(CtrlTypes dwCtrlEvent, uint dwProcessGroupId);
@@ -298,34 +274,30 @@ public static class TerminalTool
CTRL_LOGOFF_EVENT = 5,
CTRL_SHUTDOWN_EVENT = 6
}
public delegate bool ConsoleCtrlHandler(CtrlTypes ctrlType);
}
//——— Tool Methods ———//
[McpServerTool, Description("""
List all active terminal sessions.
Return Format:
{
sessions: [ { session_id: string, label: string }, ... ]
}
[McpServerTool, Description(
"""
Lists all currently active persistent terminal sessions being managed.
Provides the essential `sessionId` (required for all other operations on a session) and the human-readable `label` for each.
Use this to find the `sessionId` of an existing session you want to interact with.
Return Format: { sessions: [ { session_id: string, label: string }, ... ] }
""")]
public static ListSessionsResult ListSessions()
public static ListSessionsResult ListTerminalSessions()
{
var sessions = _sessions.Values.Select(s => new SessionInfo(s.Id, s.Label)).ToList();
List<SessionInfo> sessions = _sessions.Values.Select(s => new SessionInfo(s.Id, s.Label)).ToList();
return new ListSessionsResult(sessions);
}
[McpServerTool, Description("""
Create a new terminal session.
Return Format:
{
status: 'success' | 'fail',
session: { session_id: string, label: string }
}
[McpServerTool, Description(
"""
Creates a new persistent terminal session (a background shell like bash or cmd) and assigns it a unique `sessionId`.
This `sessionId` is **essential** and **must be used** in subsequent calls to other TerminalTool functions (like SendInput..., OneOffCommand, GetCachedResult, ExitSession) to target this specific session.
The `label` is purely for human reference (e.g., in ListTerminalSessions).
Return Format: { status: 'success' | 'fail', session: { session_id: string, label: string } }
""")]
public static CreateSessionResult CreateSession(
public static CreateSessionResult CreateTerminalSession(
[Description("Memorable label for the new session.")] string label
)
{
@@ -333,12 +305,8 @@ public static class TerminalTool
{
string sessionId = Guid.NewGuid().ToString("N");
var session = new TerminalSession(sessionId, label);
if (_sessions.TryAdd(sessionId, session))
{
return new CreateSessionResult("success", new SessionInfo(sessionId, label));
}
session.Dispose();
return new CreateSessionResult("fail", new SessionInfo(string.Empty, string.Empty));
}
@@ -347,15 +315,14 @@ public static class TerminalTool
return new CreateSessionResult("fail", new SessionInfo(string.Empty, string.Empty));
}
}
[McpServerTool, Description("""
Exit a terminal session. Fails if the session ID does not exist.
Return Format:
{
status: 'success' | 'fail'
}
[McpServerTool, Description(
"""
Terminates and cleans up a specific persistent terminal session identified by its `sessionId`.
This effectively closes the background shell process associated with that session.
Use this when you are finished working with a specific session. Fails if the `sessionId` is invalid.
Return Format: { status: 'success' | 'fail' }
""")]
public static ExitSessionResult ExitSession(
public static ExitSessionResult ExitTerminalSession(
[Description("ID of the session to exit.")] string sessionId
)
{
@@ -364,18 +331,16 @@ public static class TerminalTool
session.Dispose();
return new ExitSessionResult("success");
}
return new ExitSessionResult("fail");
}
[McpServerTool, Description("""
Send a signal to a terminal session (e.g., SIGINT=2).
Return Format:
{
status: 'success' | 'fail'
}
[McpServerTool, Description(
"""
Terminates and cleans up a specific persistent terminal session identified by its `sessionId`.
This effectively closes the background shell process associated with that session.
Use this when you are finished working with a specific session. Fails if the `sessionId` is invalid.
Return Format: { status: 'success' | 'fail' }
""")]
public static SendSignalResult SendSignal(
public static SendSignalResult SendSignalToTerminalSession(
[Description("Session ID to send the signal to.")] string sessionId,
[Description("Signal number to send (e.g., 2 for SIGINT)." )] int signal
)
@@ -385,23 +350,18 @@ public static class TerminalTool
bool success = session.SendSignal(signal);
return new SendSignalResult(success ? "success" : "fail");
}
return new SendSignalResult("fail");
}
[McpServerTool, Description("""
Send input to a terminal session and wait until the output matches one of the exception regexes or timeout.
Use cases: interactive prompts (e.g., confirmation prompts, password input).
Return Format:
{
output_by: 'except' | 'timeout',
matched_except: string | null,
stdout: string,
stderr: string
}
Note: cached stdout/stderr is cleared after this call.
[McpServerTool, Description(
"""
Sends input text to a specific terminal session (identified by `sessionId`) and WAITS for output.
It returns ONLY when specific regex patterns (`excepts`) are matched in the session's stdout/stderr OR the `timeout` is reached.
**Use Case:** Handling interactive prompts within the shell (e.g., password prompts, 'yes/no' confirmations) where you need to wait for a specific response pattern before proceeding.
Clears the session's output buffer upon returning. Compare with `SendInputAndForget` and `OneOffCommand` for different interaction patterns.
Return Format: { output_by: 'except' | 'timeout', matched_except: string | null, stdout: string, stderr: string }
""")]
public static SendInputWithExceptResult SendInputWithExcept(
public static SendInputWithExceptResult SendCommandToTerminalSessionWithExcept(
[Description("Session ID to send input to.")] string sessionId,
[Description("Input text to send (without newline)." )] string input,
[Description("Timeout in milliseconds.")] int timeout,
@@ -409,23 +369,16 @@ public static class TerminalTool
)
{
if (!_sessions.TryGetValue(sessionId, out var session))
{
return new SendInputWithExceptResult("timeout", null, string.Empty, string.Empty);
}
session.SendInput(input);
var regexPatterns = excepts.Select(pattern => new Regex(pattern, RegexOptions.Compiled)).ToArray();
string matchedPattern = null;
bool matched = false;
var watch = Stopwatch.StartNew();
while (watch.ElapsedMilliseconds < timeout && !matched)
{
var (stdout, stderr) = session.GetBuffers();
string combinedOutput = stdout + stderr;
for (int i = 0; i < regexPatterns.Length; i++)
{
if (regexPatterns[i].IsMatch(combinedOutput))
@@ -435,17 +388,11 @@ public static class TerminalTool
break;
}
}
if (!matched)
{
Thread.Sleep(10);
}
}
watch.Stop();
var (finalStdout, finalStderr) = session.GetAndClearBuffers();
return new SendInputWithExceptResult(
matched ? "except" : "timeout",
matchedPattern,
@@ -454,24 +401,23 @@ public static class TerminalTool
);
}
[McpServerTool, Description("""
Send input to a terminal session without waiting for output. Output is cached for later retrieval.
Use cases: long-running or background commands. e.g. ssh
Return Format:
{
status: 'success' | 'fail'
}
[McpServerTool, Description(
"""
Sends a POSIX-style signal to the process running within the specified terminal session (identified by `sessionId`).
Common use is sending signal 2 (SIGINT) to simulate Ctrl+C, interrupting a running command within that specific session's shell.
Requires the `sessionId` of an active session. Fails if the `sessionId` is invalid or the signal cannot be delivered.
Return Format: { status: 'success' | 'fail' }
""")]
public static SendInputAndForgetResult SendInputAndForget(
public static SendInputAndForgetResult SendCommandToTerminalSessionAndForget(
[Description("Session ID to send input to.")] string sessionId,
[Description("Input text to send (without newline)." )] string input
[Description("Input text to send (without newline)." )] string command
)
{
if (_sessions.TryGetValue(sessionId, out var session))
{
try
{
session.SendInput(input);
session.SendInput(command);
return new SendInputAndForgetResult("success");
}
catch
@@ -483,66 +429,45 @@ public static class TerminalTool
return new SendInputAndForgetResult("fail");
}
[McpServerTool, Description("""
Execute a one-off command in the specified session and return stdout/stderr when done or timed out.
Use cases: quick commands that complete shortly (e.g., ls, echo).
Return Format:
{
return_by: 'finish' | 'timeout',
stdout: string,
stderr: string
}
[McpServerTool, Description(
"""
Executes a single command line within a specific terminal session (identified by `sessionId`), waits for it to finish, and returns the collected stdout/stderr.
This tool manages sending the command and detecting its completion automatically.
**Use Case:** Running relatively quick, synchronous commands where you need the output right away (e.g., `ls -l`, `pwd`, `git status`, `echo $VAR`).
Compare with `SendInputAndForget` (for background tasks) and `SendInputWithExcept` (for interactive prompts).
Return Format: { return_by: 'finish' | 'timeout' | 'error', stdout: string, stderr: string }
""")]
public static OneOffCommandResult OneOffCommand(
public static OneOffCommandResult SendOneOffCommandToTerminalSession(
[Description("Session ID to execute the command in.")] string sessionId,
[Description("Command to execute, including arguments.")] string command,
[Description("Timeout in milliseconds.")] int timeout
)
{
if (!_sessions.TryGetValue(sessionId, out var session))
{
return new OneOffCommandResult("timeout", string.Empty, string.Empty);
}
return new OneOffCommandResult("error", string.Empty, string.Empty);
session.ClearBuffers();
string marker = $"CMD_COMPLETE_{Guid.NewGuid():N}";
if (OperatingSystem.IsWindows())
{
session.SendInput($"{command} & echo {marker}");
}
else
{
session.SendInput($"{command}; echo {marker}");
}
bool completed = false;
var watch = Stopwatch.StartNew();
while (watch.ElapsedMilliseconds < timeout && !completed)
{
var (stdout, _) = session.GetBuffers();
if (stdout.Contains(marker))
{
completed = true;
}
else
{
Thread.Sleep(10);
}
}
watch.Stop();
var (finalStdout, finalStderr) = session.GetAndClearBuffers();
if (completed)
{
finalStdout = Regex.Replace(finalStdout, $"{marker}\r?\n?$", "");
finalStderr = Regex.Replace(finalStderr, $"{marker}\r?\n?$", "");
}
return new OneOffCommandResult(
completed ? "finish" : "timeout",
finalStdout,
@@ -550,15 +475,13 @@ public static class TerminalTool
);
}
[McpServerTool, Description("""
Get and clear cached stdout/stderr of the specified session.
Return Format:
{
stdout: string,
stderr: string
}
[McpServerTool, Description(
"""
Retrieves AND clears all accumulated standard output (stdout) and standard error (stderr) that have been buffered within the specified terminal session (identified by `sessionId`) since the last read or clear operation.
**Use Case:** Primarily used to collect the output from commands previously started with `SendInputAndForget`. Call this periodically or when you expect a background task might have produced output.
Return Format: { stdout: string, stderr: string }
""")]
public static GetCachedResultResult GetCachedResult(
public static GetCachedResultResult GetTerminalSessionCachedResult(
[Description("Session ID to retrieve output from.")] string sessionId
)
{
@@ -567,16 +490,14 @@ public static class TerminalTool
var (stdout, stderr) = session.GetAndClearBuffers();
return new GetCachedResultResult(stdout, stderr);
}
return new GetCachedResultResult(string.Empty, string.Empty);
}
[McpServerTool, Description("""
Clear cached stdout/stderr of the specified session.
Return Format:
{
status: 'success' | 'fail'
}
[McpServerTool, Description(
"""
Discards (clears) any accumulated stdout and stderr buffered within the specified terminal session (identified by `sessionId`) without returning the content.
**Use Case:** Useful if you want to ignore any previous output before running a new command or checking for fresh output, particularly if using `SendInputAndForget`.
Return Format: { status: 'success' | 'fail' }
""")]
public static ClearResult Clear(
[Description("Session ID to clear cache for.")] string sessionId
@@ -587,7 +508,9 @@ public static class TerminalTool
session.ClearBuffers();
return new ClearResult("success");
}
return new ClearResult("fail");
}
}

9
appsettings.json Normal file
View File

@@ -0,0 +1,9 @@
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Trace"
}
}
}

8
entrypoint.sh Normal file
View File

@@ -0,0 +1,8 @@
#!/usr/bin/env sh
set -e
if [ ! -f /etc/ssh/ssh_host_rsa_key ]; then
ssh-keygen -A
fi
/usr/sbin/sshd
exec dotnet Alchegos.MCP.dll

141
playground.sh Normal file
View File

@@ -0,0 +1,141 @@
#!/bin/sh
# ssh_passwordless_manager.sh
# Manage passwordless SSH hosts: list, add, delete, edit, query.
CONFIG_FILE="$HOME/.ssh_playground_hosts"
# Ensure config file exists
touch "$CONFIG_FILE"
# Print usage information
usage() {
cat <<EOF
Usage: $(basename "$0") <command> [options]
Commands:
list List all hosts configured for SSH connection
add <alias> <user@host> <priv_key> [pub_key]
Add a new host; installs public key and saves config
delete <alias> Remove a host; deletes key from remote and config
edit <alias> <new_priv_key> [new_pub_key]
Replace the key for a given host
query <alias> Show the configuration for a given host
help Show this help message
EOF
exit 1
}
# Load entry by alias
load_entry() {
grep "^$1|" "$CONFIG_FILE"
}
# List hosts
list_hosts() {
if [ ! -s "$CONFIG_FILE" ]; then
echo "No hosts configured."
exit 0
fi
printf "%-15s %-25s %s\n" "ALIAS" "USER@HOST" "PRIVATE_KEY"
echo "---------------------------------------------------------------"
while IFS='|' read -r alias userhost privkey pubkey; do
printf "%-15s %-25s %s\n" "$alias" "$userhost" "$privkey"
done < "$CONFIG_FILE"
}
# Add host
add_host() {
[ $# -lt 3 ] && echo "add requires alias, user@host, private key" && usage
alias="$1"; userhost="$2"; privkey="$3"; pubkey="$4"
[ -z "$pubkey" ] && pubkey="${privkey}.pub"
if load_entry "$alias" >/dev/null; then
echo "Alias '$alias' already exists." && exit 1
fi
# Copy public key to remote
echo "Installing public key to $userhost..."
ssh-copy-id -i "$pubkey" "$userhost" || { echo "Failed to install key."; exit 1; }
# Save to config
echo "$alias|$userhost|$privkey|$pubkey" >> "$CONFIG_FILE"
echo "Host '$alias' added."
}
# Delete host
delete_host() {
[ $# -lt 1 ] && echo "delete requires alias" && usage
alias="$1"
entry=$(load_entry "$alias")
[ -z "$entry" ] && echo "Alias '$alias' not found." && exit 1
IFS='|' read -r _ userhost privkey pubkey <<EOF
$entry
EOF
# Read public key content
pubcontent=$(sed -n '1p' "$pubkey")
# Remove key from remote authorized_keys
echo "Removing public key from $userhost..."
ssh "$userhost" "mkdir -p ~/.ssh && chmod 700 ~/.ssh && \
grep -v '$pubcontent' ~/.ssh/authorized_keys > ~/.ssh/authorized_keys.tmp && \
mv ~/.ssh/authorized_keys.tmp ~/.ssh/authorized_keys" || echo "Warning: could not remove key on remote."
# Remove from config
grep -v "^$alias|" "$CONFIG_FILE" > "$CONFIG_FILE.tmp" && mv "$CONFIG_FILE.tmp" "$CONFIG_FILE"
echo "Host '$alias' deleted."
}
# Edit host key
edit_host() {
[ $# -lt 2 ] && echo "edit requires alias and new private key" && usage
alias="$1"; newpriv="$2"; newpub="$3"
[ -z "$newpub" ] && newpub="${newpriv}.pub"
entry=$(load_entry "$alias")
[ -z "$entry" ] && echo "Alias '$alias' not found." && exit 1
IFS='|' read -r _ userhost oldpriv oldpub <<EOF
$entry
EOF
# Remove old key
oldcontent=$(sed -n '1p' "$oldpub")
echo "Removing old key from $userhost..."
ssh "$userhost" "grep -v '$oldcontent' ~/.ssh/authorized_keys > ~/.ssh/authorized_keys.tmp && mv ~/.ssh/authorized_keys.tmp ~/.ssh/authorized_keys" || echo "Warning: could not remove old key."
# Install new key
echo "Installing new public key to $userhost..."
ssh-copy-id -i "$newpub" "$userhost" || { echo "Failed to install new key."; exit 1; }
# Update config
grep -v "^$alias|" "$CONFIG_FILE" > "$CONFIG_FILE.tmp"
echo "$alias|$userhost|$newpriv|$newpub" >> "$CONFIG_FILE.tmp"
mv "$CONFIG_FILE.tmp" "$CONFIG_FILE"
echo "Host '$alias' updated."
}
# Query host
query_host() {
[ $# -lt 1 ] && echo "query requires alias" && usage
alias="$1"
entry=$(load_entry "$alias")
[ -z "$entry" ] && echo "Alias '$alias' not found." && exit 1
IFS='|' read -r _ userhost privkey pubkey <<EOF
$entry
EOF
echo "Alias : $alias"
echo "Host : $userhost"
echo "Priv key : $privkey"
echo "Pub key : $pubkey"
}
# Main dispatch
case "$1" in
list) list_hosts ;;
add) shift; add_host "$@" ;;
delete) shift; delete_host "$@" ;;
edit) shift; edit_host "$@" ;;
query) shift; query_host "$@" ;;
help|*) usage ;;
esac