public void TestEncryptionSignature()
{
byte[] byteText = ASCIIEncoding.ASCII.GetBytes(TEXT_TO_SIGN);
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();
DigestData rsaDigestSigned = new RSASHA1Signature(rsaProvider);
((IDigestSignature)rsaDigestSigned).Sign(byteText);
string jsonSerialized = JsonConvert.SerializeObject(rsaDigestSigned);
DigestData rsaJsonDigest = (DigestData)JsonConvert.DeserializeObject(jsonSerialized, typeof(DigestData));
IDigestSignature rsaDigestVerify = new RSASHA1Signature(rsaJsonDigest, rsaProvider);
bool verified = rsaDigestVerify.Verify(byteText);
Assert.IsTrue(verified);
}
public void TestFileEncryption()
{
// Load the file to encrypt
byte[] imgData = File.ReadAllBytes(IMG_FILE_NAME);
AESEncryptor aesEncryptor = new AESEncryptor(PASSWORD);
RSACryptoServiceProvider rsaProviderOlivierCodepro = new RSACryptoServiceProvider();
RSAOAEPEncryptor rsaDigestEncrypt = new RSAOAEPEncryptor(rsaProviderOlivierCodepro);
RSACryptoServiceProvider rsaProviderOlivierRouit = new RSACryptoServiceProvider();
RSASHA1Signature rsaDigestSigned = new RSASHA1Signature(rsaProviderOlivierRouit);
// Encrypt the file data, the key and sign the original file data
EncryptedFile encryptFile = new EncryptedFile(imgData,
new FileDescription(IMG_FILE_NAME, MIME_JPG, APP_SLIDESHOW, ALGO_AES),
aesEncryptor,
new Recipient[] { new Recipient(USER_ID_DEST1, rsaDigestEncrypt) },
new Owner(USER_ID_SRCE, rsaDigestSigned));
// Build an EncryptedFile instance from the encrypted content with header
EncryptedFile encryptFileOut = new EncryptedFile(encryptFile.EncryptedContent);
EncryptedDataHeader encryptedHeader = encryptFileOut.EncryptedHeader;
// Process the encrypted DigestData to extract the AES key
IDigestEncryptor encryptDigest = RSADigestFactory.CreateDigestData(encryptedHeader.EncryptedKeys.Where(k => k.UserID == USER_ID_DEST1).First().Encrypted, rsaProviderOlivierCodepro) as IDigestEncryptor;
byte[] decryptedKeyAndIV = encryptDigest.Decrypt();
IEncryptProcess aesDecryptor = new AESEncryptor(decryptedKeyAndIV);
byte[] decryptedFileData = aesDecryptor.DecryptData(encryptFileOut.EncryptedFileData);
// Process the Signature DigestData
IDigestSignature signDigest = RSADigestFactory.CreateDigestData(encryptedHeader.Signature, rsaProviderOlivierRouit) as IDigestSignature;
bool verified = signDigest.Verify(decryptedFileData);
Assert.IsTrue(verified);
}
public void TestEncrypteDatadHeader()
{
EncryptedDataHeader encryptedHeader = new EncryptedDataHeader(FILE_NAME, USER_ID_SRCE);
encryptedHeader.Application = APP_NOTEPAD;
encryptedHeader.EncryptionAlgorithm = ALGO_AES;
encryptedHeader.MIME = MIME_TEXT;
AesCryptoServiceProvider aesServiceProvider = new AesCryptoServiceProvider();
aesServiceProvider.KeySize = 256;
aesServiceProvider.GenerateKey();
aesServiceProvider.GenerateIV();
byte[] key = aesServiceProvider.Key;
byte[] iv = aesServiceProvider.IV;
byte[] aesKeyAndIV = new byte[key.Length + iv.Length];
Buffer.BlockCopy(key, 0, aesKeyAndIV, 0, key.Length);
Buffer.BlockCopy(iv, 0, aesKeyAndIV, key.Length, iv.Length);
// Encrypt the AES key with the public key of the OlivierCodepro certificate
RSACryptoServiceProvider rsaProviderOlivierCodepro = new RSACryptoServiceProvider();
DigestData rsaDigestEncrypt = new RSAOAEPEncryptor(rsaProviderOlivierCodepro);
((IDigestEncryptor)rsaDigestEncrypt).Encrypt(aesKeyAndIV);
EncryptedKey encryptedAesKeyForOlivierCodepro = new EncryptedKey(USER_ID_DEST1, rsaDigestEncrypt);
encryptedHeader.EncryptedKeys = new EncryptedKey[] { encryptedAesKeyForOlivierCodepro };
// Sign the test BEFORE it is encrypted using OlivierRouit private key
byte[] byteText = ASCIIEncoding.ASCII.GetBytes(TEXT_TO_SIGN);
RSACryptoServiceProvider rsaProviderOlivierRouit = new RSACryptoServiceProvider();
DigestData rsaDigestSigned = new RSASHA1Signature(rsaProviderOlivierRouit);
((IDigestSignature)rsaDigestSigned).Sign(byteText);
encryptedHeader.Signature = rsaDigestSigned;
string jsonSerialized = JsonConvert.SerializeObject(encryptedHeader);
EncryptedDataHeader encryptedHeaderDeserialized = JsonConvert.DeserializeObject<EncryptedDataHeader>(jsonSerialized);
// Process the Signature DigestData
IDigestSignature signDigest = RSADigestFactory.CreateDigestData(encryptedHeaderDeserialized.Signature, rsaProviderOlivierRouit) as IDigestSignature;
bool verified = signDigest.Verify(byteText);
Assert.IsTrue(verified);
// Process the encrypted DigestData
IDigestEncryptor encryptDigest = RSADigestFactory.CreateDigestData(encryptedHeaderDeserialized.EncryptedKeys.Where(k => k.UserID == USER_ID_DEST1).First().Encrypted, rsaProviderOlivierCodepro) as IDigestEncryptor;
byte[] decryptedKeyAndIV = encryptDigest.Decrypt();
bool equals = aesKeyAndIV.HasSameContent(decryptedKeyAndIV);
Assert.IsTrue(equals);
}
