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(C#) Load an SSH Key from a File (Many Formats Supported)

Demonstrates how to load an SSH public or private key object from a file. The file can be in any of the following formats:

  • OpenSSH private key
  • OpenSSH public key
  • PuTTY private key
  • RFC 4716 public key

Chilkat .NET Downloads

Chilkat .NET Framework

Chilkat for .NET Core

Chilkat.SshKey sshkey = new Chilkat.SshKey();

// First, use the LoadText convenience method to load a text file (of any SSH key format)
// into a string:
string strKey = sshkey.LoadText("../mySshKeys/myKey.txt");

// Next, load the key into the SSH key object.

// If the key is an OpenSSH private key:
// (In actuality, the From* methods will automatically detect the format and load
// the key correctly.  For example, if a PuTTY private key is passed to FromOpenSshPrivateKey,
// it  will still load correctly.)
bool success = sshkey.FromOpenSshPrivateKey(strKey);
if (success != true) {
    Debug.WriteLine(sshkey.LastErrorText);
}
else {
    Debug.WriteLine("Loaded OpenSSH private key.");
    return;
}

// If the key is an OpenSSH public key:
success = sshkey.FromOpenSshPublicKey(strKey);
if (success != true) {
    Debug.WriteLine(sshkey.LastErrorText);
}
else {
    Debug.WriteLine("Loaded OpenSSH public key.");
    return;
}

// If the key is a PuTTY private key:
success = sshkey.FromPuttyPrivateKey(strKey);
if (success != true) {
    Debug.WriteLine(sshkey.LastErrorText);
}
else {
    Debug.WriteLine("Loaded PuTTY private key.");
    return;
}

// If the key is an RFC 4716 public key:
success = sshkey.FromRfc4716PublicKey(strKey);
if (success != true) {
    Debug.WriteLine(sshkey.LastErrorText);
}
else {
    Debug.WriteLine("Loaded RFC 4716 public key.");
}


 

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