115 lines
4.7 KiB
Swift
115 lines
4.7 KiB
Swift
//
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// NativeCrypto.swift
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// native_crypto_ios
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//
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// Created by Hugo Pointcheval on 04/04/2023.
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//
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import Foundation
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import CryptoKit
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public class NativeCrypto: NSObject, NativeCryptoAPI {
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func hash(data: FlutterStandardTypedData, algorithm: HashAlgorithm) throws -> FlutterStandardTypedData? {
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var md = HashAlgorithmParser.getMessageDigest(algorithm: algorithm)
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md.update(data: data.data)
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let bytes = Data(md.finalize())
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return FlutterStandardTypedData(bytes: bytes)
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}
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func hmac(data: FlutterStandardTypedData, key: FlutterStandardTypedData, algorithm: HashAlgorithm) throws -> FlutterStandardTypedData? {
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let symmetricKey : SymmetricKey = SymmetricKey.init(data: key.data)
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switch algorithm {
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case .sha256: return FlutterStandardTypedData(bytes: Data(HMAC<SHA256>(key: symmetricKey).finalize()))
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case .sha384: return FlutterStandardTypedData(bytes: Data(HMAC<SHA384>(key: symmetricKey).finalize()))
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case .sha512: return FlutterStandardTypedData(bytes: Data(HMAC<SHA512>(key: symmetricKey).finalize()))
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@unknown default: fatalError("Unknown algorithm")
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}
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}
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func generateSecureRandom(length: Int64) throws -> FlutterStandardTypedData? {
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let lengthInt = Int(truncatingIfNeeded: length)
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let bitCount = lengthInt * 8
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let symmetricKey = SymmetricKey.init(size: SymmetricKeySize(bitCount: bitCount))
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let bytes = symmetricKey.withUnsafeBytes
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{
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return Data(Array($0))
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}
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return FlutterStandardTypedData(bytes: bytes)
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}
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func pbkdf2(password: FlutterStandardTypedData, salt: FlutterStandardTypedData, length: Int64, iterations: Int64, algorithm: HashAlgorithm) throws -> FlutterStandardTypedData? {
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let lengthInt = Int(truncatingIfNeeded: length)
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let iterationsInt = Int(truncatingIfNeeded: iterations)
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let pbkdf2 = Pbkdf2(length: lengthInt, iterations: iterationsInt, hashAlgorithm: algorithm)
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pbkdf2.initialize(password: password.data, salt: salt.data)
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let data = try? pbkdf2.derive()
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if (data == nil) {
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return nil
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}
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return FlutterStandardTypedData(bytes: data!)
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}
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func encrypt(plainText: FlutterStandardTypedData, key: FlutterStandardTypedData, algorithm: CipherAlgorithm) throws -> FlutterStandardTypedData? {
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let aes = AESCipher()
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let bytes = try? aes.encrypt(data: plainText.data, key: key.data, predefinedIV: nil)
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if (bytes == nil) {
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return nil
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}
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return FlutterStandardTypedData(bytes: bytes!)
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}
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func encryptWithIV(plainText: FlutterStandardTypedData, iv: FlutterStandardTypedData, key: FlutterStandardTypedData, algorithm: CipherAlgorithm) throws -> FlutterStandardTypedData? {
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let aes = AESCipher()
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let bytes = try? aes.encrypt(data: plainText.data, key: key.data, predefinedIV: iv.data)
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if (bytes == nil) {
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return nil
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}
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return FlutterStandardTypedData(bytes: bytes!)
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}
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func decrypt(cipherText: FlutterStandardTypedData, key: FlutterStandardTypedData, algorithm: CipherAlgorithm) throws -> FlutterStandardTypedData? {
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let aes = AESCipher()
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let bytes = try? aes.decrypt(data: cipherText.data, key: key.data)
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if (bytes == nil) {
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return nil
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}
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return FlutterStandardTypedData(bytes: bytes!)
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}
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func encryptFile(plainTextPath: String, cipherTextPath: String, key: FlutterStandardTypedData, algorithm: CipherAlgorithm) throws -> Bool? {
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let aes = AESCipher()
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let params = FileParameters(input: plainTextPath, output: cipherTextPath)
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let success = try? aes.encryptFile(fileParameters: params, key: key.data, predefinedIV: nil)
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return success
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}
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func encryptFileWithIV(plainTextPath: String, cipherTextPath: String, iv: FlutterStandardTypedData, key: FlutterStandardTypedData, algorithm: CipherAlgorithm) throws -> Bool? {
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let aes = AESCipher()
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let params = FileParameters(input: plainTextPath, output: cipherTextPath)
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let success = try? aes.encryptFile(fileParameters: params, key: key.data, predefinedIV: iv.data)
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return success
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}
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func decryptFile(cipherTextPath: String, plainTextPath: String, key: FlutterStandardTypedData, algorithm: CipherAlgorithm) throws -> Bool? {
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let aes = AESCipher()
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let params = FileParameters(input: cipherTextPath, output: plainTextPath)
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let success = try? aes.decryptFile(fileParameters: params, key: key.data)
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return success
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}
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}
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