Swift 中的 SHA256 - 导入框架问题

问题描述

限时删除！！

我试图在我的 Swift 函数之一中使用 CC_SHA256_DIGEST_LENGTH 并且它抛出一个错误，因为它找不到那个符号.我已经尝试了所有方法，在桥头文件中导入 CommonCrypto 并尝试使用 .map 解决方案......没有任何效果.

如何在 Swift 中使用 CC_SHA256_DIGEST_LENGTH?所有的解决方案似乎都停止工作了.谢谢！

解决方案

将以下行添加到您的桥接头:
#import

Swift 2.x 示例:

func doSha256(#dataIn:NSData) ->NSData {var shaOut: NSMutableData!= NSMutableData(长度:Int(CC_SHA256_DIGEST_LENGTH))；CC_SHA256(dataIn.bytes, CC_LONG(dataIn.length), UnsafeMutablePointer(shaOut.mutableBytes));返回 shaOut;}

Swift 3.0 示例:

func hashSHA256(data:Data) ->数据?{var hashData = Data(count: Int(CC_SHA256_DIGEST_LENGTH))_ = hashData.withUnsafeMutableBytes {digestBytes indata.withUnsafeBytes {messageBytes inCC_SHA256(messageBytes, CC_LONG(data.count),digestBytes)}}返回哈希数据}让 clearData = "clearData0123456".data(using:String.Encoding.utf8)！print("clearData: \(clearData.map { String(format: "%02hhx", $0) }.joined())")让 hash = hashSHA256(data:clearData)print("hash: \(hash!.map { String(format: "%02hhx", $0) }.joined())")

输出:

clearData:636c65617244617461303132333343536
哈希:aabc766b6b357564e41f4f912d494bccbfa16924b574abbdba9e3e9da0c8920a

我没有在目标构建阶段中添加任何框架.
您确定桥接头设置正确吗?我通过添加 .m 文件添加了我的文件，并让系统自动添加桥接头并更新任何目标设置.

从已弃用的文档部分移出的通用哈希方法:

这个函数需要一个散列名称和要散列的数据并返回一个数据:

名称:哈希函数的名称作为字符串数据:要散列的数据返回: 散列结果作为数据

func hash(name:String, data:Data) ->数据?{让算法 = ["MD2": (CC_MD2, CC_MD2_DIGEST_LENGTH),MD4":(CC_MD4，CC_MD4_DIGEST_LENGTH)，MD5":(CC_MD5，CC_MD5_DIGEST_LENGTH)，SHA1":(CC_SHA1，CC_SHA1_DIGEST_LENGTH)，SHA224":(CC_SHA224，CC_SHA224_DIGEST_LENGTH)，SHA256":(CC_SHA256，CC_SHA256_DIGEST_LENGTH)，SHA384":(CC_SHA384，CC_SHA384_DIGEST_LENGTH)，SHA512":(CC_SHA512，CC_SHA512_DIGEST_LENGTH)]守卫让(hashAlgorithm，长度)= algos[name] else { return nil }var hashData = Data(count: Int(length))_ = hashData.withUnsafeMutableBytes {digestBytes indata.withUnsafeBytes {messageBytes inhashAlgorithm(messageBytes, CC_LONG(data.count),digestBytes)}}返回哈希数据}

注意:新作品中不应使用 MD2、MD4、MD5 和 SHA1，它们对于消息摘要的使用不再安全.

I'm trying to use CC_SHA256_DIGEST_LENGTH in one of my functions in Swift and it throws an error because it cannot find that symbol. I've tried everything, importing CommonCrypto in the bridge-header and trying that .map solution.. Nothing works.

How can I use CC_SHA256_DIGEST_LENGTH in Swift? All the solutions seems to have stopped working.Thank you!

解决方案

Add the following line to your bridging header:
#import <CommonCrypto/CommonHMAC.h>

Swift 2.x example:

func doSha256(#dataIn:NSData) -> NSData {
    var shaOut: NSMutableData! = NSMutableData(length: Int(CC_SHA256_DIGEST_LENGTH));
    CC_SHA256(dataIn.bytes, CC_LONG(dataIn.length), UnsafeMutablePointer<UInt8>(shaOut.mutableBytes));

    return shaOut;
}

Swift 3.0 example:

func hashSHA256(data:Data) -> Data? {
    var hashData = Data(count: Int(CC_SHA256_DIGEST_LENGTH))
    _ = hashData.withUnsafeMutableBytes {digestBytes in
        data.withUnsafeBytes {messageBytes in
            CC_SHA256(messageBytes, CC_LONG(data.count), digestBytes)
        }
    }
    return hashData
}

let clearData   = "clearData0123456".data(using:String.Encoding.utf8)!
print("clearData: \(clearData.map { String(format: "%02hhx", $0) }.joined())")

let hash = hashSHA256(data:clearData)
print("hash: \(hash!.map { String(format: "%02hhx", $0) }.joined())")

Output:

I don't have any frameworks added in the target Build Phases.
Be are you sure that the bridging-header is set up correctly? I added mine by adding a .m file and let the system automatically add the bridging-header and update any target settings.

This function takes a hash name and Data to be hashed and returns a Data:

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

func hash(name:String, data:Data) -> Data? {
    let algos = ["MD2":    (CC_MD2,    CC_MD2_DIGEST_LENGTH),
                 "MD4":    (CC_MD4,    CC_MD4_DIGEST_LENGTH),
                 "MD5":    (CC_MD5,    CC_MD5_DIGEST_LENGTH),
                 "SHA1":   (CC_SHA1,   CC_SHA1_DIGEST_LENGTH),
                 "SHA224": (CC_SHA224, CC_SHA224_DIGEST_LENGTH),
                 "SHA256": (CC_SHA256, CC_SHA256_DIGEST_LENGTH),
                 "SHA384": (CC_SHA384, CC_SHA384_DIGEST_LENGTH),
                 "SHA512": (CC_SHA512, CC_SHA512_DIGEST_LENGTH)]
    guard let (hashAlgorithm, length) = algos[name]  else { return nil }
    var hashData = Data(count: Int(length))

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

Note: MD2, MD4, MD5 and SHA1 should not be used in new work, they are no longer secure for message digest usage.

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