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lib/common/encrypt/pwd.dart

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+
+import 'package:cashier_reserve/common/print/print.dart';
+import 'package:encrypt/encrypt.dart';
+import 'package:pointycastle/asymmetric/api.dart';
+
+class PwdEncrypt {
+  static const _rsaPubKey =
+      "MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBANL378k3RiZHWx5AfJqdH9xRNBmD9wGD2iRe41HdTNF8RUhNnHit5NpMNtGL0NPTSSpPjjI1kJfVorRvaQerUgkCAwEAAQ==";
+
+  static String encrypt(String pwd) {
+    return _encryptString(publicKeyString: _rsaPubKey, plainText: pwd);
+  }
+
+  /// 利用公钥进行加密
+  static String _encryptString(
+      {required String publicKeyString, required String plainText}) {
+    String key = '-----BEGIN PUBLIC KEY-----\n\r';
+    int length = 0;
+    const baseLen = 64;
+    while (length < publicKeyString.length) {
+      bool over = length + baseLen > publicKeyString.length;
+      key += publicKeyString.substring(
+          length, over ? publicKeyString.length : length + baseLen);
+      key += '\n\r';
+      length += baseLen;
+    }
+    key += '-----END PUBLIC KEY-----';
+
+    yjPrint(key);
+
+    final publicKey = _parsePublicKeyFromPem(key);
+
+    final encrypt = Encrypter(RSA(publicKey: publicKey));
+
+    final encryptedText = encrypt.encrypt(plainText);
+
+    return encryptedText.base64;
+  }
+
+  /// 通过PEM字符串解析公钥字符串
+  static RSAPublicKey _parsePublicKeyFromPem(String pemString) {
+    final key = RSAKeyParser().parse(pemString);
+    return key as RSAPublicKey;
+  }
+}