/*
* verify a clear text signed file
*/
public static PgpSignatureInfo VerifyFile(
Stream inputStream,
Stream pubkeyRing)
{
var aIn = new ArmoredInputStream(inputStream);
Stream outStr = new MemoryStream();
//
// write out signed section using the local line separator.
// note: trailing white space needs to be removed from the end of
// each line RFC 4880 Section 7.1
//
var lineOut = new MemoryStream();
var lookAhead = ReadInputLine(lineOut, aIn);
var newline = Encoding.ASCII.GetBytes(Environment.NewLine);
if (lookAhead != -1 && aIn.IsClearText())
{
var line = lineOut.ToArray();
outStr.Write(line, 0, GetLengthWithoutSeparatorOrTrailingWhitespace(line));
outStr.Write(newline, 0, newline.Length);
while (lookAhead != -1 && aIn.IsClearText())
{
lookAhead = ReadInputLine(lineOut, lookAhead, aIn);
line = lineOut.ToArray();
outStr.Write(line, 0, GetLengthWithoutSeparatorOrTrailingWhitespace(line));
outStr.Write(newline, 0, newline.Length);
}
}
//outStr.Close();
var pgpRings = new PgpPublicKeyRingBundle(pubkeyRing);
var pgpFact = new PgpObjectFactory(aIn);
var p3 = (PgpSignatureList)pgpFact.NextPgpObject();
var sig = p3[0];
sig.InitVerify(pgpRings.GetPublicKey(sig.KeyId));
//
// read the input, making sure we ignore the last newline.
//
var sigIn = outStr;
// Set position of stream to start.
sigIn.Position = 0;
lookAhead = ReadInputLine(lineOut, sigIn);
ProcessLine(sig, lineOut.ToArray());
if (lookAhead != -1)
{
do
{
lookAhead = ReadInputLine(lineOut, lookAhead, sigIn);
sig.Update((byte)'\r');
sig.Update((byte)'\n');
ProcessLine(sig, lineOut.ToArray());
}while (lookAhead != -1);
}
var siginfo = new PgpSignatureInfo();
if (sig.Verify())
{
siginfo.KeyId = String.Format("{0:X}", sig.KeyId);
siginfo.Valid = true;
siginfo.Version = sig.Version;
siginfo.Created = sig.CreationTime;
siginfo.HashAlgorithm = sig.HashAlgorithm;
siginfo.Signature = sig;
return(siginfo);
}
siginfo.KeyId = String.Format("{0:X}", sig.KeyId);
siginfo.Valid = false;
siginfo.Version = sig.Version;
siginfo.Created = sig.CreationTime;
siginfo.HashAlgorithm = sig.HashAlgorithm;
siginfo.Signature = sig;
return(siginfo);
}
/**
* verify the signature in in against the file fileName.
*/
public static PgpSignatureInfo VerifySignature(
string fileName,
Stream signature,
Stream keyIn)
{
signature = PgpUtilities.GetDecoderStream(signature);
var pgpFact = new PgpObjectFactory(signature);
PgpSignatureList p3;
var o = pgpFact.NextPgpObject();
var data = o as PgpCompressedData;
if (data != null)
{
var c1 = data;
pgpFact = new PgpObjectFactory(c1.GetDataStream());
p3 = (PgpSignatureList)pgpFact.NextPgpObject();
}
else
{
p3 = (PgpSignatureList)o;
}
var pgpPubRingCollection = new PgpPublicKeyRingBundle(
PgpUtilities.GetDecoderStream(keyIn));
Stream dIn = File.OpenRead(fileName);
var sig = p3[0];
var key = pgpPubRingCollection.GetPublicKey(sig.KeyId);
sig.InitVerify(key);
int ch;
while ((ch = dIn.ReadByte()) >= 0)
{
sig.Update((byte)ch);
}
dIn.Close();
var siginfo = new PgpSignatureInfo();
if (sig.Verify())
{
siginfo.KeyId = String.Format("{0:X}", sig.KeyId);
siginfo.Valid = true;
siginfo.Version = sig.Version;
siginfo.Created = sig.CreationTime;
siginfo.HashAlgorithm = sig.HashAlgorithm;
siginfo.Signature = sig;
return(siginfo);
}
siginfo.KeyId = String.Format("{0:X}", sig.KeyId);
siginfo.Valid = false;
siginfo.Version = sig.Version;
siginfo.Created = sig.CreationTime;
siginfo.HashAlgorithm = sig.HashAlgorithm;
siginfo.Signature = sig;
return(siginfo);
}
