/// <summary>
/// ritorna il numero di firme contenute nel documento
/// </summary>
/// <param name="signedFile"></param>
/// <returns></returns>
/// <remarks>supporta PAdES</remarks>
public int GetSignatureCount(byte[] signedFile)
{
int nHandle = 0, nCountSignature = 0;
//Controlla in primis se il documento รจ PADES.
try
{
oDigest.PADES_OpenFromBuf(signedFile, out nHandle);
if (nHandle != 0)
{
nCountSignature = oDigest.PADES_GetSignatureCount(nHandle);
oDigest.PADES_Free(nHandle);
}
}
catch { }
finally
{
try
{
if (nHandle != 0)
{
oDigest.PADES_Free(nHandle);
}
}
catch { }
}
// Controlla le firme CADES
try
{
oDigest.P7kLoadFromBuf(signedFile, 1, out nHandle);
if (nHandle != 0)
{
int nCount;
oDigest.P7kGetSignatureCount(nHandle, out nCount);
nCountSignature += nCount;
}
}
catch { }
finally
{
try
{
oDigest.P7kFree(nHandle);
}
catch { }
}
return(nCountSignature);
}
