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Smart.Security 4.1.6

Smart.Security

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English

Smart.Security is a .NET security helper library built on .NET cryptography APIs and BouncyCastle. It provides AES, RSA, SM2, SM3, SM4, hash, HMAC, password salt/hash, file hash, and secure random helpers. It supports .NET 8, 9, and 10.

Installation

dotnet add package Smart.Security

Examples

AES

using Smart.Security;

var key = SmartAESCipher.GenerateKey();
string cipherText = SmartAESCipher.Encrypt("Hello World", key.Key, key.IV);
string plainText = SmartAESCipher.Decrypt(cipherText, key.Key, key.IV);

RSA

using Smart.Security;

var keyPair = SmartRSACipher.GenerateRSAKeyPair(2048);
byte[] data = Encoding.UTF8.GetBytes("Secret Message");

byte[] cipherBytes = SmartRSACipher.Encrypt(keyPair.Public, data);
byte[] plainBytes = SmartRSACipher.Decrypt(keyPair.Private, cipherBytes);

byte[] signature = SmartRSACipher.Sign(keyPair.Private, data);
bool valid = SmartRSACipher.VerifySign(keyPair.Public, data, signature);

SM2 / SM3 / SM4

byte[] sm3 = SmartSM3Hash.SM3Hash(Encoding.UTF8.GetBytes("Data to hash"));

var sm4Key = SmartSM4Cipher.GenerateKey();
string sm4Cipher = SmartSM4Cipher.Encrypt("SM4 message", sm4Key.Base64Key, sm4Key.Base64IV);
string sm4Plain = SmartSM4Cipher.Decrypt(sm4Cipher, sm4Key.Base64Key, sm4Key.Base64IV);

byte[] sm2Cipher = SmartSM2Cipher.Encrypt(publicKeyBytes, plainBytes);
byte[] sm2Plain = SmartSM2Cipher.Decrypt(privateKeyBytes, sm2Cipher);
byte[] sm2Signature = SmartSM2Cipher.Sign(privateKeyBytes, plainBytes);
bool sm2Valid = SmartSM2Cipher.VerifySign(publicKeyBytes, plainBytes, sm2Signature);

Hash And HMAC

byte[] data = Encoding.UTF8.GetBytes("Data to hash");

string sha256 = SmartHash.SHA256Hash(data);
string sha512 = SmartHash.SHA512Hash(data);
string hmac = SmartHash.HmacSHA256(data, "secret-key");

File Hash

string md5 = SmartFileHash.MD5Hash(filePath);
string sha256 = await SmartFileHash.SHA256HashAsync(filePath);

Password Salt And Hash

SmartPassword generates a Base64 salt and stores a Base64 SHA256 hash of password + salt.

string salt = SmartPassword.GenerateSalt();
string hash = SmartPassword.HashPassword("user_password", salt);
bool valid = SmartPassword.VerifyPassword("user_password", salt, hash);

Secure Random

string base64Key = SmartRandom.GenerateKey(256);
byte[] bytes = SmartRandom.RandomArray(32);
string text = SmartRandom.RandomString(16);
string digits = SmartRandom.RandomNumber(6);
long number = SmartRandom.RandomLong();

Security Notes

• Prefer SHA256/384/512 over MD5/SHA1 for new scenarios.
• Use RSA keys of at least 2048 bits.
• Keep encryption keys and salts in secure storage.
• Use unique IV values for each encryption operation.

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中文

Smart.Security 是基于 .NET 密码学 API 和 BouncyCastle 的安全工具库，提供 AES、RSA、SM2、SM3、SM4、哈希、HMAC、密码盐值/哈希、文件哈希和安全随机数等能力，兼容 .NET 8/9/10。

安装

dotnet add package Smart.Security

示例

AES

using Smart.Security;

var key = SmartAESCipher.GenerateKey();
string cipherText = SmartAESCipher.Encrypt("Hello World", key.Key, key.IV);
string plainText = SmartAESCipher.Decrypt(cipherText, key.Key, key.IV);

RSA

using Smart.Security;

var keyPair = SmartRSACipher.GenerateRSAKeyPair(2048);
byte[] data = Encoding.UTF8.GetBytes("Secret Message");

byte[] cipherBytes = SmartRSACipher.Encrypt(keyPair.Public, data);
byte[] plainBytes = SmartRSACipher.Decrypt(keyPair.Private, cipherBytes);

byte[] signature = SmartRSACipher.Sign(keyPair.Private, data);
bool valid = SmartRSACipher.VerifySign(keyPair.Public, data, signature);

SM2 / SM3 / SM4

byte[] sm3 = SmartSM3Hash.SM3Hash(Encoding.UTF8.GetBytes("待哈希数据"));

var sm4Key = SmartSM4Cipher.GenerateKey();
string sm4Cipher = SmartSM4Cipher.Encrypt("SM4 消息", sm4Key.Base64Key, sm4Key.Base64IV);
string sm4Plain = SmartSM4Cipher.Decrypt(sm4Cipher, sm4Key.Base64Key, sm4Key.Base64IV);

byte[] sm2Cipher = SmartSM2Cipher.Encrypt(publicKeyBytes, plainBytes);
byte[] sm2Plain = SmartSM2Cipher.Decrypt(privateKeyBytes, sm2Cipher);
byte[] sm2Signature = SmartSM2Cipher.Sign(privateKeyBytes, plainBytes);
bool sm2Valid = SmartSM2Cipher.VerifySign(publicKeyBytes, plainBytes, sm2Signature);

哈希与 HMAC

byte[] data = Encoding.UTF8.GetBytes("待哈希数据");

string sha256 = SmartHash.SHA256Hash(data);
string sha512 = SmartHash.SHA512Hash(data);
string hmac = SmartHash.HmacSHA256(data, "secret-key");

文件哈希

string md5 = SmartFileHash.MD5Hash(filePath);
string sha256 = await SmartFileHash.SHA256HashAsync(filePath);

密码盐值与哈希

SmartPassword 会生成 Base64 盐值，并保存 password + salt 的 Base64 SHA256 哈希。

string salt = SmartPassword.GenerateSalt();
string hash = SmartPassword.HashPassword("user_password", salt);
bool valid = SmartPassword.VerifyPassword("user_password", salt, hash);

安全随机数

string base64Key = SmartRandom.GenerateKey(256);
byte[] bytes = SmartRandom.RandomArray(32);
string text = SmartRandom.RandomString(16);
string digits = SmartRandom.RandomNumber(6);
long number = SmartRandom.RandomLong();

安全建议

• 新场景优先使用 SHA256/384/512，避免继续使用 MD5/SHA1。
• RSA 密钥长度建议不低于 2048 位。
• 加密密钥和盐值应存储在安全位置。
• 每次加密操作应使用唯一 IV。

Developed by zenglei