# PIYO-114

**Repository Path**: Wanzuo/piyo

## Basic Information

- **Project Name**: PIYO-114
- **Description**: New Works!
- **Primary Language**: Go
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 824
- **Forks**: 0
- **Created**: 2025-10-22
- **Last Updated**: 2026-02-14

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

```java
public class HMACUDF extends UDF {
  private KeyProvider keyProvider;
  private SecretKey hmacKey;

  @Override
  public String evaluate(String id, String keyName) {
    // 初始化KeyProvider（从Hadoop配置中获取）
    if (keyProvider == null) {
      keyProvider = KeyProviderLoader.getProvider(HadoopConfiguration.getInstance());
    }
    // 获取密钥（KMS解密后返回）
    if (hmacKey == null) {
      hmacKey = keyProvider.getKey(keyName).getEncodedKey(); // 内存中临时存储
    }
    // 计算HMAC-SHA256
    Mac mac = Mac.getInstance("HmacSHA256");
    mac.init(hmacKey);
    byte[] hash = mac.doFinal(id.getBytes(StandardCharsets.UTF_8));
    // 清除内存中的密钥（减少泄露风险）
    Arrays.fill(hmacKey.getEncoded(), (byte) 0);
    return Hex.encodeHexString(hash);
  }
}
```