生成 Seed OK；UT OK

CKMnemonic/CKMnemonic/CKMnemonic/CKMnemonic.swift

@@ -59,8 +59,42 @@ class CKMnemonic: NSObject {
 		return mnemonic.joined(separator: " ")
 	}
 
-	static func deterministicSeedString(from mnemonicString: String, passphrase: String = "", language: CKMnemonicLanguageType) -> String {
-		return ""
+	static func deterministicSeedString(from mnemonic: String, passphrase: String = "", language: CKMnemonicLanguageType) -> String {
+
+		func normalized(string: String) -> Data? {
+			guard let data = string.data(using: .utf8, allowLossyConversion: true) else {
+				return nil
+			}
+
+			guard let dataString = String(data: data, encoding: .utf8) else {
+				return nil
+			}
+
+			guard let normalizedData = dataString.data(using: .utf8, allowLossyConversion: false) else {
+				return nil
+			}
+			return normalizedData
+		}
+
+		guard let normalizedData = normalized(string: mnemonic) else {
+			return ""
+		}
+
+		guard let saltData = normalized(string: "mnemonic" + passphrase) else {
+			return ""
+		}
+
+		let password = normalizedData.bytes
+		let salt = saltData.bytes
+
+		do {
+			let bytes = try PKCS5.PBKDF2(password: password, salt: salt, iterations: 2048, variant: .sha512).calculate()
+
+			return bytes.toHexString()
+		} catch {
+			print(error)
+			return ""
+		}
 	}
 
 	static func generateMnemonic(strength: Int, language: CKMnemonicLanguageType) throws -> String {

CKMnemonic/CKMnemonic/ViewController.swift

@@ -16,6 +16,10 @@ class ViewController: UIViewController {
 		do {
 //			let mnemonic = try CKMnemonic.generateMnemonic(strength: 128, language: .english)
 			let mnemonic = try CKMnemonic.mnemonicString(from: "994fe657cc35757e7256812ff2791249", language: .english)
+			let seed = CKMnemonic.deterministicSeedString(from: mnemonic, passphrase: "Test", language: .english)
+			let seedNoSec = CKMnemonic.deterministicSeedString(from: mnemonic, language: .english)
+			print(seed)
+			print(seedNoSec)
 			print(mnemonic)
 		} catch {
 			print(error)

CKMnemonic/CKMnemonicTests/CKMnemonicTests.swift

@@ -39,6 +39,8 @@ class CKMnemonicTests: XCTestCase {
 					let selfM = try CKMnemonic.mnemonicString(from: test[0], language: .english)
 					let m = test[1]
 					XCTAssertTrue(selfM == m, "计算出的助记词没有通过测试")
+
+//					let seed = CKMnemonic.deterministicSeedString(from: selfM, language: .english)
 				}
 			}
 		} catch {