Swift 中使用 SHA512 的哈希字符串

使用 SHA512 的哈希字符串是一种在 Swift 编程语言中进行数据加密和安全传输的常见方法。SHA512 是一种密码散列函数，它将任意长度的输入数据转换成固定长度的字符串，通常为 512 位。在本文中，我们将探讨如何在 Swift 中使用 SHA512 进行哈希字符串的生成和验证，并提供一些示例代码供参考。

swift
import CommonCrypto
func sha512(_ input: String) -> String? {
    guard let data = input.data(using: .utf8) else {
        return nil
    }
    
    var hash = [UInt8](repeating: 0, count: Int(CC_SHA512_DIGEST_LENGTH))
    data.withUnsafeBytes { (pointer: UnsafeRawBufferPointer) in
        guard let baseAddress = pointer.baseAddress else {
            return
        }
        _ = CC_SHA512(baseAddress, CC_LONG(data.count), &hash)
    }
    
    return hash.map { String(format: "%02x", $0) }.joined()
}
let input = "Hello, World!"
if let hashedString = sha512(input) {
    print("Input: \(input)")
    print("SHA512 Hash: \(hashedString)")
}

swift
import CommonCrypto
func hashPassword(_ password: String) -> String? {
    return sha512(password)
}
func verifyPassword(_ password: String, againstHash hash: String) -> Bool {
    guard let hashedPassword = sha512(password) else {
        return false
    }
    
    return hashedPassword == hash
}
// 示例用法
let userPassword = "secretpassword"
if let hashedPassword = hashPassword(userPassword) {
    print("User Password: \(userPassword)")
    print("Hashed Password: \(hashedPassword)")
    
    let isValid = verifyPassword(userPassword, againstHash: hashedPassword)
    print("Password Valid: \(isValid)")
}