public override bool VerifyFile(string filePath, ref List <KeyValuePair <X509Certificate2, bool> > verifiedCMS)
{
byte[] DataDigest = new byte[0];
byte[] BlockDigest = new byte[0];
signatureBlock = new Elements(ExtractBlocks(filePath), false);
//digest of the data without the signature(s)
DataDigest = Hash(filePath);
//signatures found in the file
Dictionary <string, string> Signatures = ExtractAllSignatures(filePath);
if (Signatures.Count < 1)
{
throw new NoSignatureFoundException(filePath);
}
List <KeyValuePair <X509Certificate2, bool> > UsedCertificates = new List <KeyValuePair <X509Certificate2, bool> >();
bool Validation = true;
foreach (String Signature in Signatures.Keys)
{
BlockDigest = HashFunction.ComputeHash(new MemoryStream(System.Text.Encoding.UTF8.GetBytes(Signatures[Signature])));
byte[] merkleHash = new byte[DataDigest.Length + BlockDigest.Length];
Array.Copy(DataDigest, merkleHash, DataDigest.Length);
Array.Copy(BlockDigest, 0, merkleHash, DataDigest.Length, BlockDigest.Length);
//Content information created from the data digest
ContentInfo StepContent = new ContentInfo(merkleHash);
SignedCms SignedCMS = new SignedCms(StepContent, true);
SignedCMS.Decode(Convert.FromBase64String(Signature));
SignerInfoEnumerator Enumerator = SignedCMS.SignerInfos.GetEnumerator();
if (!Enumerator.MoveNext())
{
throw new InvalidSignerInformationException(Signature);
}
try
{
//after decoding the signed cms, we check the signature
SignedCMS.CheckSignature(true);
UsedCertificates.Add(new KeyValuePair <X509Certificate2, bool>(Enumerator.Current.Certificate, true));
}
catch (System.Security.Cryptography.CryptographicException e)
{
//signature can't be verified
UsedCertificates.Add(new KeyValuePair <X509Certificate2, bool>(Enumerator.Current.Certificate, false));
Validation = false;
}
}
verifiedCMS = UsedCertificates;
return(Validation);
}
public override bool VerifyFile(string filePath, ref List<KeyValuePair<X509Certificate2, bool>> verifiedCMS)
{
byte[] DataDigest = new byte[0];
byte[] BlockDigest = new byte[0];
signatureBlock = new Elements(ExtractBlocks(filePath), false);
//digest of the data without the signature(s)
DataDigest = Hash(filePath);
//signatures found in the file
Dictionary<string, string> Signatures = ExtractAllSignatures(filePath);
if (Signatures.Count < 1) throw new NoSignatureFoundException(filePath);
List<KeyValuePair<X509Certificate2, bool>> UsedCertificates = new List<KeyValuePair<X509Certificate2, bool>>();
bool Validation = true;
foreach (String Signature in Signatures.Keys)
{
BlockDigest = HashFunction.ComputeHash(new MemoryStream(System.Text.Encoding.UTF8.GetBytes(Signatures[Signature])));
byte[] merkleHash = new byte[DataDigest.Length + BlockDigest.Length];
Array.Copy(DataDigest, merkleHash, DataDigest.Length);
Array.Copy(BlockDigest, 0, merkleHash, DataDigest.Length, BlockDigest.Length);
//Content information created from the data digest
ContentInfo StepContent = new ContentInfo(merkleHash);
SignedCms SignedCMS = new SignedCms(StepContent, true);
SignedCMS.Decode(Convert.FromBase64String(Signature));
SignerInfoEnumerator Enumerator = SignedCMS.SignerInfos.GetEnumerator();
if (!Enumerator.MoveNext()) throw new InvalidSignerInformationException(Signature);
try
{
//after decoding the signed cms, we check the signature
SignedCMS.CheckSignature(true);
UsedCertificates.Add(new KeyValuePair<X509Certificate2, bool>(Enumerator.Current.Certificate, true));
}
catch (System.Security.Cryptography.CryptographicException e)
{
//signature can't be verified
UsedCertificates.Add(new KeyValuePair<X509Certificate2, bool>(Enumerator.Current.Certificate, false));
Validation = false;
}
}
verifiedCMS = UsedCertificates;
return Validation;
}
public STEPTRACE4PLOT(string block)
{
signatureBlock = new Elements(ExtractBlocks(block), false);
}
public STEPTRACE4PLOT(string block)
{
signatureBlock = new Elements(ExtractBlocks(block), false);
}
