public static void Test_BlockchainWithGlobalSignature()
{
// Blockchain whose block closure is guaranteed by digital signature
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
var PublicKeyBase64 = Convert.ToBase64String(RSA.ExportCspBlob(false));
var PrivateKeyBase64 = Convert.ToBase64String(RSA.ExportCspBlob(true));
Blockchain Blocks = new Blockchain(PublicKeyBase64, "Webmaster", "Phrases", Blockchain.BlockchainType.Binary, false);
byte[] Signature;
bool IsValid;
Blockchain.Block Block1 = new Blockchain.Block(Blocks, "Hi my friends, I have a message for you");
Signature = RSA.SignHash(Block1.CalculateChecksumBytes(), System.Security.Cryptography.CryptoConfig.MapNameToOID("SHA256"));
IsValid = Block1.AddBlockSignature(Signature); // Close the block with the digital signature
Blockchain.Block Block2 = new Blockchain.Block(Blocks, "This is a message number 2, signed");
Signature = RSA.SignHash(Block2.CalculateChecksumBytes(), System.Security.Cryptography.CryptoConfig.MapNameToOID("SHA256"));
IsValid = Block2.AddBlockSignature(Signature); // Close the block with the digital signature
Blockchain.Block Block3 = new Blockchain.Block(Blocks, "In the last block I added the last message");
Signature = RSA.SignHash(Block3.CalculateChecksumBytes(), System.Security.Cryptography.CryptoConfig.MapNameToOID("SHA256"));
IsValid = Block3.AddBlockSignature(Signature); // Close the block with the digital signature
int BlockError = Blocks.Validate(); // 0 = no error
var LastBlock = Blocks.GetLastBlock();
}
public static void Test_BlockchainWithDocumentsSignedAndGlobalSignature()
{
// Blockchain with the content having double signature and the block closure is guaranteed by digital signature
var rsa = new System.Security.Cryptography.RSACryptoServiceProvider();
var publicKeyBase64 = Convert.ToBase64String(rsa.ExportCspBlob(false));
var blocks = new Blockchain(new[] { publicKeyBase64 }, "Webmaster", "Phrases", Blockchain.BlockchainType.Binary, Blockchain.BlockSynchronization.AddInLocalAndSync, true);
var test = blocks.Validate();
bool isValid;
var block1 = new Blockchain.Block(blocks, "Hi my friends, I have a message for you");
var signature = rsa.SignHash(block1.HashBody(), System.Security.Cryptography.CryptoConfig.MapNameToOID("SHA256"));
isValid = block1.AddBodySignature(publicKeyBase64, signature, false); // Add signature to body
signature = rsa.SignHash(block1.CalculateChecksumBytes(), System.Security.Cryptography.CryptoConfig.MapNameToOID("SHA256"));
isValid = block1.AddBlockSignature(signature); // Close the block with the digital signature
var block2 = new Blockchain.Block(blocks, "This is a message number 2, signed");
signature = rsa.SignHash(block2.HashBody(), System.Security.Cryptography.CryptoConfig.MapNameToOID("SHA256"));
isValid = block2.AddBodySignature(publicKeyBase64, signature, false); // Add signature to body
signature = rsa.SignHash(block2.CalculateChecksumBytes(), System.Security.Cryptography.CryptoConfig.MapNameToOID("SHA256"));
isValid = block2.AddBlockSignature(signature); // Close the block with the digital signature
var block3 = new Blockchain.Block(blocks, "In the last block I added the last message");
signature = rsa.SignHash(block3.HashBody(), System.Security.Cryptography.CryptoConfig.MapNameToOID("SHA256"));
isValid = block3.AddBodySignature(publicKeyBase64, signature, false); // Add signature to body
signature = rsa.SignHash(block3.CalculateChecksumBytes(), System.Security.Cryptography.CryptoConfig.MapNameToOID("SHA256"));
isValid = block3.AddBlockSignature(signature); // Close the block with the digital signature
var blockError = blocks.Validate(); // 0 = no error
var lastBlock = blocks.GetLastBlock();
}