Implement bank transfer app flows

2026-06-08 00:03:57 +05:00
parent ef877217ad
commit 9b281d48a7
127 changed files with 8008 additions and 90 deletions
@@ -0,0 +1,38 @@
+import CommonCrypto
+import Foundation
+
+enum PinHash {
+    private static let iterations: UInt32 = 100_000
+    private static let keyLength = 32  // 256 bits
+
+    static func generateSalt() -> Data {
+        var salt = Data(count: 16)
+        _ = salt.withUnsafeMutableBytes { SecRandomCopyBytes(kSecRandomDefault, 16, $0.baseAddress!) }
+        return salt
+    }
+
+    static func hash(_ input: String, salt: Data) -> String {
+        var derivedKey = Data(count: keyLength)
+        let inputData  = Data(input.utf8)
+
+        _ = derivedKey.withUnsafeMutableBytes { derivedPtr in
+            inputData.withUnsafeBytes { inputPtr in
+                salt.withUnsafeBytes { saltPtr in
+                    CCKeyDerivationPBKDF(
+                        CCPBKDFAlgorithm(kCCPBKDF2),
+                        inputPtr.baseAddress, inputData.count,
+                        saltPtr.baseAddress, salt.count,
+                        CCPseudoRandomAlgorithm(kCCPRFHmacAlgSHA256),
+                        iterations,
+                        derivedPtr.baseAddress, keyLength
+                    )
+                }
+            }
+        }
+        return derivedKey.base64EncodedString()
+    }
+
+    static func verify(_ input: String, against storedHash: String, salt: Data) -> Bool {
+        hash(input, salt: salt) == storedHash
+    }
+}