比對使用者提供的資料

  /**
   * @fileoverview Provides the hashing algorithm, as well as some valid hashes of
   * sample data for testing.
  */

  async function hash(token) {
    // Removes leading or trailing spaces and converts all characters to lowercase.
    const formattedToken = token.trim().toLowerCase();
    // Hashes the formatted string using the SHA-256 hashing algorithm.
    const hashBuffer = await crypto.subtle.digest(
        'SHA-256', (new TextEncoder()).encode(formattedToken));
    // Converts the hash buffer to a base64-encoded string and returns it.
    const base64Str = btoa(String.fromCharCode(...new Uint8Array(hashBuffer)));
    return base64Str;
  }

  function main() {
    // Expected hash for test@gmail.com:
    // h5JGBrQTGorO7q6IaFMfu5cSqqB6XTp1aybOD11spnQ=
    hash('test@gmail.com').then(result => console.log(result));

    // Expected hash for +18005551212:
    // YdkRG+0+bZz8G8O1yzWkAmh8TxVGvuBhor1ET73WTEQ=
    hash('+18005551212').then(result => console.log(result));

    // Expected hash for John: ltljLzY1ZMwwMlIUCc8iqFLyAy7sCZ7VlnwNAAzsYHo=
    hash('John').then(result => console.log(result));

    // Expected hash for Doe: eZ75KhGvkY4/t0HfQpNPO1aO0tk6wd908bjUGieTKm8=
    hash('Doe').then(result => console.log(result));
  }

  main()

  """Provides the hashing algorithm, as well as some valid hashes of sample data for testing.

  Supports: Python 2, Python 3

  Sample hashes:

    - Email 'test@gmail.com': h5JGBrQTGorO7q6IaFMfu5cSqqB6XTp1aybOD11spnQ=
    - Phone '+18005551212':   YdkRG+0+bZz8G8O1yzWkAmh8TxVGvuBhor1ET73WTEQ=
    - First name 'John':      ltljLzY1ZMwwMlIUCc8iqFLyAy7sCZ7VlnwNAAzsYHo=
    - Last name 'Doe':        eZ75KhGvkY4/t0HfQpNPO1aO0tk6wd908bjUGieTKm8=
  """

  import base64
  import hashlib

  def hash(token):
  # Generates a base64-encoded SHA-256 hash of a normalized input string.
    return base64.b64encode(
        hashlib.sha256(
            token.strip().lower().encode('utf-8')).digest()).decode('utf-8')

  def print_hash(token, expected=None):
  # Computes and displays the hash of a token, with optional validation.
    hashed = hash(token)

    if expected is not None and hashed != expected:
      print(
          'ERROR: Incorrect hash for token "{}". Expected "{}", got "{}"'.format(
              token, expected, hashed))
      return

    print('Hash: "{}"\t(Token: {})'.format(hashed, token))

  def main():
  # Tests the hash function with sample tokens and expected results.
    print_hash(
        'test@gmail.com', expected='h5JGBrQTGorO7q6IaFMfu5cSqqB6XTp1aybOD11spnQ=')
    print_hash(
        '+18005551212', expected='YdkRG+0+bZz8G8O1yzWkAmh8TxVGvuBhor1ET73WTEQ=')
    print_hash('John', expected='ltljLzY1ZMwwMlIUCc8iqFLyAy7sCZ7VlnwNAAzsYHo=')
    print_hash('Doe', expected='eZ75KhGvkY4/t0HfQpNPO1aO0tk6wd908bjUGieTKm8=')

  if __name__ == '__main__':
    main()

  /*
  Provides the hashing algorithm, as well as some valid hashes of sample data for testing.

  Sample hashes:

    - Email 'test@gmail.com': h5JGBrQTGorO7q6IaFMfu5cSqqB6XTp1aybOD11spnQ=
    - Phone '+18005551212':   YdkRG+0+bZz8G8O1yzWkAmh8TxVGvuBhor1ET73WTEQ=
    - First name 'John':      ltljLzY1ZMwwMlIUCc8iqFLyAy7sCZ7VlnwNAAzsYHo=
    - Last name 'Doe':        eZ75KhGvkY4/t0HfQpNPO1aO0tk6wd908bjUGieTKm8=
  */
  package main

  import (
    "crypto/sha256"
    "encoding/base64"
    "fmt"
    "strings"
  )

  // Hash hashes an email, phone, first name, or last name into the correct format.
  func Hash(token string) string {
    formatted := strings.TrimSpace(strings.ToLower(token))
    hashed := sha256.Sum256([]byte(formatted))
    encoded := base64.StdEncoding.EncodeToString(hashed[:])
    return encoded
  }

  // PrintHash prints the hash for a token.
  func PrintHash(token string) {
    fmt.Printf("Hash: \"%s\"\t(Token: %s)\n", Hash(token), token)

  }

  func main() {
    PrintHash("test@gmail.com")
    PrintHash("+18005551212")
    PrintHash("John")
    PrintHash("Doe")
  }

  package updm.hashing;

  import static java.nio.charset.StandardCharsets.UTF_8;

  import java.security.MessageDigest;
  import java.security.NoSuchAlgorithmException;
  import java.util.Base64;

  /**
  * Example of the hashing algorithm.
  *
  * <p>Sample hashes:
  *
  * <ul>
  *   <li>Email 'test@gmail.com': h5JGBrQTGorO7q6IaFMfu5cSqqB6XTp1aybOD11spnQ=
  *   <li>Phone '+18005551212': YdkRG+0+bZz8G8O1yzWkAmh8TxVGvuBhor1ET73WTEQ=
  *   <li>First name 'John': ltljLzY1ZMwwMlIUCc8iqFLyAy7sCZ7VlnwNAAzsYHo=
  *   <li>Last name 'Doe': eZ75KhGvkY4/t0HfQpNPO1aO0tk6wd908bjUGieTKm8=
  * </ul>
  */
  public final class HashExample {

  private HashExample() {}

  public static String hash(String token) {
    // Normalizes and hashes the input token using SHA-256 and Base64 encoding.
    String formattedToken = token.toLowerCase().strip();

    byte[] hash;
    try {
      hash = MessageDigest.getInstance("SHA-256").digest(formattedToken.getBytes(UTF_8));
    } catch (NoSuchAlgorithmException e) {
      throw new IllegalStateException("SHA-256 not supported", e);
    }

    return Base64.getEncoder().encodeToString(hash);
  }

  public static void printHash(String token) {
    // Calculates and prints the hash for the given token.
    System.out.printf("Hash: \"%s\"\t(Token: %s)\n", hash(token), token);
  }

  public static void main(String[] args) {
    // Executes hash calculations and prints results for sample tokens.
    printHash("test@gmail.com");
    printHash("+18005551212");
    printHash("John");
    printHash("Doe");
  }
  }

  /*
  Provides the hashing algorithm, as well as some valid hashes of sample data for testing.

  The following code uses Google Standard SQL and can be run on BigQuery to generate match tables from unhashed data.

  Sample hashes:

    - Email 'test@gmail.com': h5JGBrQTGorO7q6IaFMfu5cSqqB6XTp1aybOD11spnQ=
    - Phone '+18005551212':   YdkRG+0+bZz8G8O1yzWkAmh8TxVGvuBhor1ET73WTEQ=
    - First name 'John':      ltljLzY1ZMwwMlIUCc8iqFLyAy7sCZ7VlnwNAAzsYHo=
    - Last name 'Doe':        eZ75KhGvkY4/t0HfQpNPO1aO0tk6wd908bjUGieTKm8=

  The unhashed input table schema is assumed to be:

  - Column name: UserID, Type: String
  - Column name: Email, Type: String
  - Column name: Phone, Type: String
  - Column name: FirstName, Type: String
  - Column name: LastName, Type: String
  - Column name: PostalCode, Type: String
  - Column name: CountryCode, Type: String
  */

  -- Creates a new table with Base64-encoded SHA-256 hashes of specified columns.
  CREATE TABLE `your_project_name.your_dataset_name.output_hashed_table_name`
  AS
  SELECT
    UserID,
    TO_BASE64(SHA256(LOWER(Email))) AS Email,
    TO_BASE64(SHA256(Phone)) AS Phone,
    TO_BASE64(SHA256(LOWER(FirstName))) AS FirstName,
    TO_BASE64(SHA256(LOWER(LastName))) AS LastName,
    PostalCode,
    CountryCode,
  FROM
    `your_project_name.your_dataset_name.input_unhashed_table_name`;