public void VerifySignOneFileSha1()
{
var input = new PgpVerifySignatureInput
{
InputFile = _signature,
PublicKeyFile = _publicKeyPath,
};
PgpVerifySignatureResult resultObject = PgpTasks.VerifyFileSignature(input);
Assert.That(resultObject.Verified);
}
/// <summary>
/// Verifies a PGP signature. See documentation at https://github.com/CommunityHiQ/Frends.Community.PgpVerifySignature Returns: Object {string FilePath, Boolean Verified}
/// </summary>
public static PgpVerifySignatureResult VerifyFileSignature(PgpVerifySignatureInput input)
{
using (var inputStream = PgpUtilities.GetDecoderStream(File.OpenRead(input.InputFile)))
using (var keyStream = PgpUtilities.GetDecoderStream(File.OpenRead(input.PublicKeyFile)))
{
var pgpFact = new PgpObjectFactory(inputStream);
var signatureList = (PgpOnePassSignatureList)pgpFact.NextPgpObject();
if (signatureList == null)
{
throw new Exception("Can't find signature in file.");
}
var onePassSignature = signatureList[0];
var p2 = (PgpLiteralData)pgpFact.NextPgpObject();
var dataIn = p2.GetInputStream();
var pgpRing = new PgpPublicKeyRingBundle(keyStream);
var key = pgpRing.GetPublicKey(onePassSignature.KeyId);
string outputPath;
if (string.IsNullOrWhiteSpace(input.OutputFolder))
{
outputPath = Path.Combine(Path.GetDirectoryName(input.InputFile) ?? throw new ArgumentNullException(input.InputFile), p2.FileName);
}
else
{
outputPath = Path.Combine(input.OutputFolder, p2.FileName);
}
using (var outputStream = File.Create(outputPath))
{
onePassSignature.InitVerify(key);
int ch;
while ((ch = dataIn.ReadByte()) >= 0)
{
onePassSignature.Update((byte)ch);
outputStream.WriteByte((byte)ch);
}
outputStream.Close();
}
bool verified;
// Will throw Exception if file is altered
try
{
var p3 = (PgpSignatureList)pgpFact.NextPgpObject();
var firstSig = p3[0];
verified = onePassSignature.Verify(firstSig);
}
catch (Exception)
{
var retError = new PgpVerifySignatureResult
{
FilePath = input.OutputFolder,
Verified = false
};
return(retError);
}
var ret = new PgpVerifySignatureResult
{
FilePath = outputPath,
Verified = verified
};
return(ret);
}
}
