public static HashAlgorithm GetHashAlgorithm(CMS_HASH_DIGESTMETHOD digestMethod)
{
if (digestMethod == CMS_HASH_DIGESTMETHOD.CMS_HASH_DIGESTMETHOD_SHA1)
{
return((HashAlgorithm) new SHA1CryptoServiceProvider());
}
if (digestMethod == CMS_HASH_DIGESTMETHOD.CMS_HASH_DIGESTMETHOD_SHA256)
{
if (PlatformSpecific.OnWindows2003 || PlatformSpecific.OnVistaOrAbove)
{
return(CryptoConfig.CreateFromName("System.Security.Cryptography.SHA256CryptoServiceProvider") as HashAlgorithm);
}
return((HashAlgorithm) new SHA256Managed());
}
if (digestMethod == CMS_HASH_DIGESTMETHOD.CMS_HASH_DIGESTMETHOD_SHA384)
{
if (PlatformSpecific.OnWindows2003 || PlatformSpecific.OnVistaOrAbove)
{
return(CryptoConfig.CreateFromName("System.Security.Cryptography.SHA384CryptoServiceProvider") as HashAlgorithm);
}
return((HashAlgorithm) new SHA384Managed());
}
if (digestMethod == CMS_HASH_DIGESTMETHOD.CMS_HASH_DIGESTMETHOD_SHA512)
{
if (PlatformSpecific.OnWindows2003 || PlatformSpecific.OnVistaOrAbove)
{
return(CryptoConfig.CreateFromName("System.Security.Cryptography.SHA512CryptoServiceProvider") as HashAlgorithm);
}
return((HashAlgorithm) new SHA512Managed());
}
throw new NotSupportedException(string.Format((IFormatProvider)CultureInfo.CurrentUICulture, Resources.GetString("Ex_DigestMethodNotSupported"), new object[1]
{
(object)digestMethod.ToString()
}));
}
public Hash(byte[] digestValue, CMS_HASH_DIGESTMETHOD digestMethod, CMS_HASH_TRANSFORM transform)
{
if (digestValue == null)
{
throw new ArgumentException(Resources.GetString("Ex_HashNullDigestValue"));
}
this._digestValue = digestValue;
this._digestMethod = digestMethod;
this._transform = transform;
}
public static byte[] GenerateDigestValue(string filePath, CMS_HASH_DIGESTMETHOD digestMethod, CMS_HASH_TRANSFORM transform)
{
Stream inputStream = (Stream)null;
try
{
HashAlgorithm hashAlgorithm = ComponentVerifier.GetHashAlgorithm(digestMethod);
inputStream = ComponentVerifier.GetTransformedStream(filePath, transform);
return(hashAlgorithm.ComputeHash(inputStream));
}
finally
{
if (inputStream != null)
{
inputStream.Close();
}
}
}
public void AddHash(byte[] digestValue, CMS_HASH_DIGESTMETHOD digestMethod, CMS_HASH_TRANSFORM transform)
{
this._hashes.Add((object)new Hash(digestValue, digestMethod, transform));
}
