/// <summary>
/// Parse the GPG version information from the Stdout of the GPG command line interface
/// executed with the --version argument.
/// </summary>
/// <param name="data">stdout stream data</param>
/// <returns>GPG version object</returns>
public static GpgVersion Parse(StreamReader data)
{
string firstLine = ReadFirstStdOutLine(data);
GpgVersion ver = ParseVersion(firstLine);
return(ver);
}
private string GetGpgArgs(ActionTypes action)
{
// validate input
switch (action)
{
case ActionTypes.Encrypt:
case ActionTypes.SignEncrypt:
if (String.IsNullOrEmpty(_recipient))
{
throw new GpgException("A Recipient is required before encrypting data. Please specify a valid recipient using the Recipient property on the GnuPG object.");
}
break;
}
StringBuilder options = new StringBuilder();
// set a home directory if the user specifies one
if (!String.IsNullOrEmpty(_homePath))
{
options.Append(String.Format(CultureInfo.InvariantCulture, "--homedir \"{0}\" ", _homePath));
}
// tell gpg to read the passphrase from the standard input so we can automate providing it
options.Append("--passphrase-fd 0 ");
// if gpg cli version is >= 2.1 then instruct gpg not to prompt for a password
// by specifying the pinetnry-mode argument
GpgVersion ver = GetGpgVersion();
if ((ver.Major == 2 && ver.Minor >= 1) || ver.Major >= 3)
{
options.Append("--pinentry-mode loopback ");
}
// turn off verbose statements
options.Append("--no-verbose ");
// use batch mode and never ask or allow interactive commands.
options.Append("--batch ");
// always use the trusted model so we don't get an interactive session with gpg.exe
options.Append("--trust-model always ");
// if provided specify the key to use by local user name
if (!String.IsNullOrEmpty(_localUser))
{
options.Append(String.Format(CultureInfo.InvariantCulture, "--local-user {0} ", _localUser));
}
// if provided specify the recipient key to use by recipient user name
if (!String.IsNullOrEmpty(_recipient))
{
options.Append(String.Format(CultureInfo.InvariantCulture, "--recipient {0} ", _recipient));
}
// add any user specific options if provided
if (!String.IsNullOrEmpty(_userOptions))
{
options.Append(_userOptions);
}
// handle the action
switch (action)
{
case ActionTypes.Encrypt:
if (_outputType == OutputTypes.AsciiArmor)
{
options.Append("--armor ");
}
// if a filename needs to be embedded in the encrypted blob, set it
if (!String.IsNullOrEmpty(_filename))
{
options.Append(String.Format(CultureInfo.InvariantCulture, "--set-filename \"{0}\" ", _filename));
}
options.Append("--encrypt ");
break;
case ActionTypes.Decrypt:
options.Append("--decrypt ");
break;
case ActionTypes.Sign:
switch (_outputSignatureType)
{
case OutputSignatureTypes.ClearText:
options.Append("--clearsign ");
break;
case OutputSignatureTypes.Detached:
options.Append("--detach-sign ");
break;
case OutputSignatureTypes.Signature:
options.Append("--sign ");
break;
}
break;
case ActionTypes.SignEncrypt:
if (_outputType == OutputTypes.AsciiArmor)
{
options.Append("--armor ");
}
// if a filename needs to be embedded in the encrypted blob, set it
if (!String.IsNullOrEmpty(_filename))
{
options.Append(String.Format(CultureInfo.InvariantCulture, "--set-filename \"{0}\" ", _filename));
}
// determine which type of signature to generate
switch (_outputSignatureType)
{
case OutputSignatureTypes.ClearText:
options.Append("--clearsign ");
break;
case OutputSignatureTypes.Detached:
options.Append("--detach-sign ");
break;
case OutputSignatureTypes.Signature:
options.Append("--sign ");
break;
}
break;
case ActionTypes.Verify:
options.Append("--verify ");
break;
case ActionTypes.Import:
options.Append("--import ");
break;
}
return(options.ToString());
}
/// <summary>
/// Gets the GPG binary version number as reported by the executable.
/// </summary>
/// <returns>GPG version number in the string format x.y.z</returns>
public GpgVersion GetGpgVersion()
{
GpgVersion ver = GpgVersionParser.Parse(ExecuteGpgNoIO("--version"));
return(ver);
}