有人知道如何在 swift 中重现 PHP 哈希方法 hash('SHA512', $value, true) 吗？我尝试将 CommonCrypto C 库与以下代码一起使用：

extension String {
    func digest(length:Int32, gen:(data: UnsafePointer<Void>, len: CC_LONG, md: UnsafeMutablePointer<UInt8>) -> UnsafeMutablePointer<UInt8>) -> String {
        var cStr = [UInt8](self.utf8)
        var result = [UInt8](count:Int(length), repeatedValue:0)
        gen(data: &cStr, len: CC_LONG(cStr.count), md: &result)
        let output = NSMutableString(capacity:Int(length))
        for r in result {
            output.appendFormat("%02x", r)
        }
        return String(output)
    }
}

并像这样使用它：

var digest = salted.digest(CC_SHA512_DIGEST_LENGTH, gen: {(data, len, md) in CC_SHA512(data,len,md)})

但我没有得到正确的输出

EDIT :

我有一些 PHP 代码：

echo base64_encode(hash('sha512', '8yOrBmkd', true)); // output: rlltLWeWaQCrfNTYMa0CcIs0mfLoHGAynrd+d8H65+rGAzHS/BSWsumwSmcxF9aAG9TIzXx+HOjArPyLL3herg==

我希望我的快速代码能够输出相同的结果。 Base64 编码没问题：

let utf8str = input.dataUsingEncoding(NSUTF8StringEncoding)!.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))
                let base64Encoded = utf8str!.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))
                print("Encoded:  \(base64Encoded)")

但哈希部分返回的输出值与此 PHP 代码相同：

echo base64_encode(hash('sha512', '8yOrBmkd', false)); // output: YWU1OTZkMmQ2Nzk2NjkwMGFiN2NkNGQ4MzFhZDAyNzA4YjM0OTlmMmU4MWM2MDMyOWViNzdlNzdjMWZhZTdlYWM2MDMzMWQyZmMxNDk2YjJlOWIwNGE2NzMxMTdkNjgwMWJkNGM4Y2Q3YzdlMWNlOGMwYWNmYzhiMmY3ODVlYWU=

Swift 3 实现在底部。

代码不需要那么复杂或者扩展：

func sha512Hex(string string: String) -> String {
    var digest = [UInt8](count: Int(CC_SHA512_DIGEST_LENGTH), repeatedValue: 0)
    if let data = string.dataUsingEncoding(NSUTF8StringEncoding) {
        CC_SHA512(data.bytes, CC_LONG(data.length), &digest)
    }

    var digestHex = ""
    for index in 0..<Int(CC_SHA512_DIGEST_LENGTH) {
        digestHex += String(format: "%02x", digest[index])
    }

    return digestHex
}

//测试：

let hexDigest = sha512Hex(string:"8yOrBmkd")
print("hexDigest:\n\(hexDigest)")

Output:

十六进制摘要： ae596d2d67966900ab7cd4d831ad02708b3499f2e81c60329eb77e77c1fae7eac60331d2fc1496b2e9b04a673117d6801bd4c8cd7c7e1ce8c0acfc8b2f785eae

仅返回字节数组：

func sha512(string string: String) -> [UInt8] {
    var digest = [UInt8](count: Int(CC_SHA512_DIGEST_LENGTH), repeatedValue: 0)
    let data = string.dataUsingEncoding(NSUTF8StringEncoding)!
    CC_SHA512(data.bytes, CC_LONG(data.length), &digest)

    return digest
}

//Test:

let digestRaw = sha512(string:"8yOrBmkd")
print("decimal array:\n\(digestRaw)")
print("hexadecimal:\n\(NSData(bytes:digestRaw, length:digestRaw.count).description)")

输出：

十进制数组： [174, 89, 109, 45, 103, 150, 105, 0, 171, 124, 212, 216, 49, 173, 2, 112, 139, 52, 153, 242, 232, 28, 96, 50, 158 , 183, 126, 119, 193, 250, 231, 234, 198, 3, 49, 210, 252, 20, 150, 178, 233, 176, 74, 103, 49, 23, 214, 128, 27, 212 , 200, 205, 124, 126, 28, 232, 192, 172, 252, 139, 47, 120, 94, 174]

十六进制：
ae596d2d67966900ab7cd4d831ad02708b3499f2e81c60329eb77e77c1fae7eac60331d2fc1496b2e9b04a673117d6801bd4c8cd7c7e1ce8c0acfc8b2f785eae

Base64 输出：

func sha512Base64(string string: String) -> String {
    let digest = NSMutableData(length: Int(CC_SHA512_DIGEST_LENGTH))!
    if let data = string.dataUsingEncoding(NSUTF8StringEncoding) {
        CC_SHA512(data.bytes, CC_LONG(data.length), UnsafeMutablePointer<UInt8>(digest.mutableBytes))
    }
    return digest.base64EncodedStringWithOptions(NSDataBase64EncodingOptions([]))
}

//测试：

let digestBase64 = sha512Base64(string:"8yOrBmkd")
print("Base64:\n\(digestBase64)")

Output:

Base64: rlltLWeWaQCrfNTYMa0CcIs0mfLoHGAynrd+d8H65+rGAzHS/BSWsumwSmcxF9aAG9TIzXx+HOjArPyLL3herg==

Swift 3

func hashSHA512(data:Data) -> String? {
    var hashData = Data(count: Int(CC_SHA512_DIGEST_LENGTH))

    _ = hashData.withUnsafeMutableBytes {digestBytes in
        data.withUnsafeBytes {messageBytes in
            CC_SHA512(messageBytes, CC_LONG(data.count), digestBytes)
        }
    }

    // For hexadecimal output:
    return hashData.map { String(format: "%02hhx", $0) }.joined()
    // For Base64 output use this instead of the above:
    // return data.base64EncodedString()
}

已弃用文档部分的示例：

具有 MD5、SHA1、SHA224、SHA256、SHA384、SHA512 的 HMAC（Swift 3+）

这些函数将使用八种加密哈希算法之一对字符串或数据输入进行哈希处理。

name 参数将哈希函数名称指定为字符串 支持的函数有 MD5、SHA1、SHA224、SHA256、SHA384 和 SHA512

此示例需要通用加密货币
项目必须有一个桥接头：
#import <CommonCrypto/CommonCrypto.h>
将 Security.framework 添加到项目中。

这些函数采用哈希名称、要哈希的消息、密钥并返回摘要：

hashName: name of a hash function as String  
message:  message as Data  
key:      key as Data  
returns:  digest as Data  
  

func hmac(hashName:String, message:Data, key:Data) -> Data? {
    let algos = ["SHA1":   (kCCHmacAlgSHA1,   CC_SHA1_DIGEST_LENGTH),
                 "MD5":    (kCCHmacAlgMD5,    CC_MD5_DIGEST_LENGTH),
                 "SHA224": (kCCHmacAlgSHA224, CC_SHA224_DIGEST_LENGTH),
                 "SHA256": (kCCHmacAlgSHA256, CC_SHA256_DIGEST_LENGTH),
                 "SHA384": (kCCHmacAlgSHA384, CC_SHA384_DIGEST_LENGTH),
                 "SHA512": (kCCHmacAlgSHA512, CC_SHA512_DIGEST_LENGTH)]
    guard let (hashAlgorithm, length) = algos[hashName]  else { return nil }
    var macData = Data(count: Int(length))

    macData.withUnsafeMutableBytes {macBytes in
        message.withUnsafeBytes {messageBytes in
            key.withUnsafeBytes {keyBytes in
                CCHmac(CCHmacAlgorithm(hashAlgorithm),
                       keyBytes,     key.count,
                       messageBytes, message.count,
                       macBytes)
            }
        }
    }
    return macData

}

hashName: name of a hash function as String
message:  message as String
key:      key as String
returns:  digest as Data
  

func hmac(hashName:String, message:String, key:String) -> Data? {
    let messageData = message.data(using:.utf8)!
    let keyData = key.data(using:.utf8)!
    return hmac(hashName:hashName, message:messageData, key:keyData)
}

hashName: name of a hash function as String  
message:  message as String  
key:      key as Data  
returns:  digest as Data  
  

func hmac(hashName:String, message:String, key:Data) -> Data? {
    let messageData = message.data(using:.utf8)!
    return hmac(hashName:hashName, message:messageData, key:key)
}

// 例子

let clearString = "clearData0123456"
let keyString   = "keyData8901234562"
let clearData   = clearString.data(using:.utf8)!
let keyData     = keyString.data(using:.utf8)!
print("clearString: \(clearString)")
print("keyString:   \(keyString)")
print("clearData: \(clearData as NSData)")
print("keyData:   \(keyData as NSData)")

let hmacData1 = hmac(hashName:"SHA1", message:clearData, key:keyData)
print("hmacData1: \(hmacData1! as NSData)")

let hmacData2 = hmac(hashName:"SHA1", message:clearString, key:keyString)
print("hmacData2: \(hmacData2! as NSData)")

let hmacData3 = hmac(hashName:"SHA1", message:clearString, key:keyData)
print("hmacData3: \(hmacData3! as NSData)")

Output:

clearString: clearData0123456
keyString:   keyData8901234562
clearData: <636c6561 72446174 61303132 33343536>
keyData:   <6b657944 61746138 39303132 33343536 32>

hmacData1: <bb358f41 79b68c08 8e93191a da7dabbc 138f2ae6>
hmacData2: <bb358f41 79b68c08 8e93191a da7dabbc 138f2ae6>
hmacData3: <bb358f41 79b68c08 8e93191a da7dabbc 138f2ae6>

MD2、MD4、MD5、SHA1、SHA224、SHA256、SHA384、SHA512（Swift 3+）

这些函数将使用八种加密哈希算法之一对字符串或数据输入进行哈希处理。

name 参数将哈希函数名称指定为字符串
支持的函数有 MD2、MD4、MD5、SHA1、SHA224、SHA256、SHA384 和 SHA512 A 此示例需要通用加密货币
项目必须有一个桥接头：
#import <CommonCrypto/CommonCrypto.h>
将 Security.framework 添加到项目中。

该函数采用哈希名称和要进行哈希处理的字符串并返回数据：

name: A name of a hash function as a String  
string: The String to be hashed  
returns: the hashed result as Data  
  

func hash(name:String, string:String) -> Data? {
    let data = string.data(using:.utf8)!
    return hash(name:name, data:data)
}

例子：

let clearString = "clearData0123456"
let clearData   = clearString.data(using:.utf8)!
print("clearString: \(clearString)")
print("clearData: \(clearData as NSData)")

let hashSHA256 = hash(name:"SHA256", string:clearString)
print("hashSHA256: \(hashSHA256! as NSData)")

let hashMD5 = hash(name:"MD5", data:clearData)
print("hashMD5: \(hashMD5! as NSData)")

Output:

clearString: clearData0123456
clearData: <636c6561 72446174 61303132 33343536>

hashSHA256: <aabc766b 6b357564 e41f4f91 2d494bcc bfa16924 b574abbd ba9e3e9d a0c8920a>
hashMD5: <4df665f7 b94aea69 695b0e7b baf9e9d6>