} // SecurityKeyFromPemFile.
private static void CompareSha256Implementations(string source)
{
int len = source.Length;
WriteLine($"\nSource string to be SHA-256 hashed: <{source}> ({len})");
string hashA;
string hashB;
// Compute hash using .NET Core implemenatation:
using (SHA256 sha256Hash = SHA256.Create())
{
hashA = GetHash(sha256Hash, source);
WriteLine($"The .NET Core SHA256 class hash is: <{hashA}>");
}
// Compute hash using in source implemenatation:
hashB = Sha2.GetHash(source);
WriteLine($"The in source implemented hash is: <{hashB}>");
} // CompareSha256Implementations.
} // CompareSha256Implementations.
private static void SeekForSha2ForbiddenStringLength(int lower, int upper)
{
WriteLine($"\nSeeking for Sha2 forbidden string lengths ({lower},{upper}):");
int found = 0;
for (int len = lower; len <= upper; len++)
{
// generate random string of given length:
string source = RandomString(len);
string hashA;
string hashB;
// Compute hash using .NET Core implemenatation:
using (SHA256 sha256Hash = SHA256.Create()) {
hashA = GetHash(sha256Hash, source);
}
// Compute hash using in source implemenatation:
hashB = Sha2.GetHash(source);
// Compare resualts:
if (!String.Equals(hashA, hashB))
{
// Report forbidden string length:
Write($"{len} ");
if (++found % 8 == 0)
{
WriteLine();
}
}
} // for.
if (found == 0)
{
WriteLine($"No forbidden string length found.");
}
} // SeekForForbiddenStringLength.
