ios Swift?中的AES加密

xxb16uws  于 2022-11-19  发布在  iOS
关注(0)|答案(2)|浏览(271)

我在Swift中从事AES加密工作。

  1. public static String encrypt1(String plaintext, String key, String IV) throws Exception {
  2. SecretKeySpec secretKey = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
  3. Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
  4. cipher.init(Cipher.ENCRYPT_MODE, secretKey, new IvParameterSpec(IV.getBytes("UTF-8")));
  5. byte[] ciphertext = cipher.doFinal(plaintext.getBytes("UTF-8"));
  6. byte[] iv = cipher.getIV();
  7. String asd = Base64.encodeToString(ciphertext, Base64.NO_WRAP);
  8. return asd;
  9. }

我没有找到iOS 13及以下版本的AES CBC PKCS 5 Padding加密。iOS 13有CryptoKit,这不是我所需要的。
我尝试过的快速转换://这里的操作是kCCEncrypt的默认值,即0

  1. public func encrypt1(plainText : String, key: String, iv : String, operation : Int) -> String {
  2. let data = Data(plainText.utf8)
  3. let ivData = Data(iv.utf8)
  4. let keyData = Data(key.utf8)
  5. let cryptLength = size_t(data.count + kCCBlockSizeAES128)
  6. var cryptData = Data(count:cryptLength)
  7. let keyLength = size_t(kCCKeySizeAES128)
  8. let options = CCOptions(kCCOptionPKCS7Padding)
  9. var numBytesEncrypted :size_t = 0
  10. let cryptStatus = cryptData.withUnsafeMutableBytes {cryptBytes in
  11. data.withUnsafeBytes {dataBytes in
  12. ivData.withUnsafeBytes {ivBytes in
  13. keyData.withUnsafeBytes {keyBytes in
  14. CCCrypt(CCOperation(operation), CCAlgorithm(kCCAlgorithmAES), options, keyBytes, keyLength, ivBytes, dataBytes, data.count,cryptBytes, cryptLength,&numBytesEncrypted)
  15. }
  16. }
  17. }
  18. }
  19. if UInt32(cryptStatus) == UInt32(kCCSuccess) {
  20. cryptData.removeSubrange(numBytesEncrypted..<cryptData.count)
  21. } else {
  22. print("Error: \(cryptStatus)")
  23. }
  24. print("My Encrypted Value: \(String(decoding: cryptData, as: UTF8.self))")
  25. return String(decoding: cryptData, as: UTF8.self);
  26. }

我从快速输出中得到的是:
我不明白我在做什么错误,我只遵循AES加密算法,仍然我得到垃圾输出。请帮助!!!

lp0sw83n

lp0sw83n1#

最后编写了解决方案:

  1. import CommonCrypto
  2. struct AES {
  3. // MARK: - Value
  4. // MARK: Private
  5. private let key: Data
  6. private let iv: Data
  7. // MARK: - Initialzier
  8. init?(key: String, iv: String) {
  9. guard key.count == kCCKeySizeAES128 || key.count == kCCKeySizeAES256, let keyData = key.data(using: .utf8) else {
  10. debugPrint("Error: Failed to set a key.")
  11. return nil
  12. }
  13. guard iv.count == kCCBlockSizeAES128, let ivData = iv.data(using: .utf8) else {
  14. debugPrint("Error: Failed to set an initial vector.")
  15. return nil
  16. }
  17. self.key = keyData
  18. self.iv = ivData
  19. }
  20. // MARK: - Function
  21. // MARK: Public
  22. func encrypt(string: String) -> String {
  23. guard let cryptData = crypt(data: string.data(using: .utf8), option: CCOperation(kCCEncrypt)) else { return "" }
  24. return cryptData.base64EncodedString()
  25. }
  26. func decrypt(data: Data?) -> String? {
  27. guard let decryptedData = crypt(data: data, option: CCOperation(kCCDecrypt)) else { return nil }
  28. return String(bytes: decryptedData, encoding: .utf8)
  29. }
  30. func crypt(data: Data?, option: CCOperation) -> Data? {
  31. guard let data = data else { return nil }
  32. let cryptLength = data.count + kCCBlockSizeAES128
  33. var cryptData = Data(count: cryptLength)
  34. let keyLength = key.count
  35. let options = CCOptions(kCCOptionPKCS7Padding)
  36. var bytesLength = Int(0)
  37. let status = cryptData.withUnsafeMutableBytes { cryptBytes in
  38. data.withUnsafeBytes { dataBytes in
  39. iv.withUnsafeBytes { ivBytes in
  40. key.withUnsafeBytes { keyBytes in
  41. CCCrypt(option, CCAlgorithm(kCCAlgorithmAES), options, keyBytes.baseAddress, keyLength, ivBytes.baseAddress, dataBytes.baseAddress, data.count, cryptBytes.baseAddress, cryptLength, &bytesLength)
  42. }
  43. }
  44. }
  45. }
  46. guard UInt32(status) == UInt32(kCCSuccess) else {
  47. debugPrint("Error: Failed to crypt data. Status \(status)")
  48. return nil
  49. }
  50. cryptData.removeSubrange(bytesLength..<cryptData.count)
  51. return cryptData
  52. }
  53. }

要获取字符串形式的加密值,请执行以下操作:

  1. let encryptedPassword128 = aes128?.encrypt(string: response1)
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wswtfjt7

wswtfjt72#

我使用的是CryptoSwift(https://cryptoswift.io)。

  1. func getEncryptedValue(value: String) -> String {
  2. let key = "someSecretKey"
  3. if let aes = try? AES(key: key.bytes, blockMode: ECB(), padding: .pkcs5),
  4. let aesE = try? aes.encrypt(Array(value.utf8)) {
  5. print("base64: \(Array(aesE).toBase64())")
  6. let result = Array(aesE).toBase64()
  7. return result
  8. }
  9. return ""
  10. }

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