如何使用 Swift 将字符串转换为 iOS 中的 MD5 散列？

Question

我想将 "abc" 之类的字符串转换为 MD5 散列。我想在 iOS 和 Swift 中执行此操作。我已尝试使用以下解决方案，但它们对我不起作用：

Importing CommonCrypto in a Swift framework

How to use CC_MD5 method in swift language.

http://iosdeveloperzone.com/2014/10/03/using-commoncrypto-in-swift/

更清楚地说，我想在 Swift 中实现类似于此 PHP 代码输出的输出：

$str = "Hello";

echo md5($str);

输出：8b1a9953c4611296a827abf8c47804d7

Answer 1

有两个步骤：
1.从字符串
创建md5数据 2.将md5数据转换为十六进制字符串

Swift 2.0:

func md5(string string: String) -> String {
    var digest = [UInt8](count: Int(CC_MD5_DIGEST_LENGTH), repeatedValue: 0)
    if let data = string.dataUsingEncoding(NSUTF8StringEncoding) {
        CC_MD5(data.bytes, CC_LONG(data.length), &digest)
    }

    var digestHex = ""
    for index in 0..<Int(CC_MD5_DIGEST_LENGTH) {
        digestHex += String(format: "%02x", digest[index])
    }

    return digestHex
}

//Test:
let digest = md5(string:"Hello")
print("digest: \(digest)")

输出：

digest: 8b1a9953c4611296a827abf8c47804d7

Swift 3.0:

func MD5(string: String) -> Data {
    let messageData = string.data(using:.utf8)!
    var digestData = Data(count: Int(CC_MD5_DIGEST_LENGTH))

    _ = digestData.withUnsafeMutableBytes {digestBytes in
        messageData.withUnsafeBytes {messageBytes in
            CC_MD5(messageBytes, CC_LONG(messageData.count), digestBytes)
        }
    }

    return digestData
}

//Test:
let md5Data = MD5(string:"Hello")

let md5Hex =  md5Data.map { String(format: "%02hhx", [=11=]) }.joined()
print("md5Hex: \(md5Hex)")

let md5Base64 = md5Data.base64EncodedString()
print("md5Base64: \(md5Base64)")

输出：

md5Hex: 8b1a9953c4611296a827abf8c47804d7
md5Base64: ixqZU8RhEpaoJ6v4xHgE1w==

Swift 5.0:

import Foundation
import var CommonCrypto.CC_MD5_DIGEST_LENGTH
import func CommonCrypto.CC_MD5
import typealias CommonCrypto.CC_LONG

func MD5(string: String) -> Data {
        let length = Int(CC_MD5_DIGEST_LENGTH)
        let messageData = string.data(using:.utf8)!
        var digestData = Data(count: length)

        _ = digestData.withUnsafeMutableBytes { digestBytes -> UInt8 in
            messageData.withUnsafeBytes { messageBytes -> UInt8 in
                if let messageBytesBaseAddress = messageBytes.baseAddress, let digestBytesBlindMemory = digestBytes.bindMemory(to: UInt8.self).baseAddress {
                    let messageLength = CC_LONG(messageData.count)
                    CC_MD5(messageBytesBaseAddress, messageLength, digestBytesBlindMemory)
                }
                return 0
            }
        }
        return digestData
    }

//Test:
let md5Data = MD5(string:"Hello")

let md5Hex =  md5Data.map { String(format: "%02hhx", [=12=]) }.joined()
print("md5Hex: \(md5Hex)")

let md5Base64 = md5Data.base64EncodedString()
print("md5Base64: \(md5Base64)")

输出：

md5Hex: 8b1a9953c4611296a827abf8c47804d7
md5Base64: ixqZU8RhEpaoJ6v4xHgE1w==

备注：
#import <CommonCrypto/CommonCrypto.h> 必须添加到 Bridging-Header 文件

有关如何创建桥接头，请参阅 this SO answer。

一般来说，MD5 不应该用于新工作，SHA256 是当前的最佳实践。

已弃用文档部分的示例：

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

These functions will hash either String or Data input with one of eight cryptographic hash algorithms.

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 一种此示例需要 Common Crypto
必须有项目的桥接头：
#import <CommonCrypto/CommonCrypto.h>
将 Security.framework 添加到项目中。

这个函数需要一个散列名称和要散列的字符串和returns一个数据：

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)
}

示例：

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)")

输出：

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

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

Answer 2

我用 Carthage 和 Cyrpto 来做这个。

Install Carthage if you've not already done so
Install Crypto into your project
执行'cartage update'
如果您是运行从命令行添加到 swift 文件中的框架
```
#!/usr/bin/env xcrun swift -F Carthage/Build/Mac
```
将 import Crypto 添加到您的 swift 文件。
那么就可以了！
```
print( "convert this".MD5 )
```

Answer 3

Just two notes here:

使用 Crypto 实现这一目标的开销太大。

完美！尽管如此，我只是想分享一个 Swift ier 代码方法，使用 Swift 2.2.

请记住，您仍然需要在 Bridging-Header 文件中 #import <CommonCrypto/CommonCrypto.h>

struct MD5Digester {
    // return MD5 digest of string provided
    static func digest(string: String) -> String? {

        guard let data = string.dataUsingEncoding(NSUTF8StringEncoding) else { return nil }

        var digest = [UInt8](count: Int(CC_MD5_DIGEST_LENGTH), repeatedValue: 0)

        CC_MD5(data.bytes, CC_LONG(data.length), &digest)

        return (0..<Int(CC_MD5_DIGEST_LENGTH)).reduce("") { [=10=] + String(format: "%02x", digest[]) }
    }
}

Answer 4

SWIFT 3 版本 md5 function:

func md5(_ string: String) -> String {

    let context = UnsafeMutablePointer<CC_MD5_CTX>.allocate(capacity: 1)
    var digest = Array<UInt8>(repeating:0, count:Int(CC_MD5_DIGEST_LENGTH))
    CC_MD5_Init(context)
    CC_MD5_Update(context, string, CC_LONG(string.lengthOfBytes(using: String.Encoding.utf8)))
    CC_MD5_Final(&digest, context)
    context.deallocate(capacity: 1)
    var hexString = ""
    for byte in digest {
        hexString += String(format:"%02x", byte)
    }

    return hexString
}

来自 http://iosdeveloperzone.com

的原始 link

Answer 5

这是一个基于 zaph answer 的扩展

extension String{
    var MD5:String {
        get{
            let messageData = self.data(using:.utf8)!
            var digestData = Data(count: Int(CC_MD5_DIGEST_LENGTH))

            _ = digestData.withUnsafeMutableBytes {digestBytes in
                messageData.withUnsafeBytes {messageBytes in
                    CC_MD5(messageBytes, CC_LONG(messageData.count), digestBytes)
                }
            }

            return digestData.map { String(format: "%02hhx", [=10=]) }.joined()
        }
    }
}

完全兼容 swift 3.0.you 仍然需要 #import <CommonCrypto/CommonCrypto.h> 在你的桥接头文件中

Answer 6

我发布了一个不依赖于 CommonCrypto 或其他任何东西的 pure Swift implementation。它在 MIT 许可下可用。

该代码由一个 single swift file 组成，您可以直接将其放入您的项目中。如果您愿意，还可以将包含的 Xcode 项目与框架和单元测试目标一起使用。

使用简单：

let input = "The quick brown fox jumps over the lazy dog"
let digest = input.utf8.md5
print("md5: \(digest)")

打印：md5: 9e107d9d372bb6826bd81d3542a419d6

swift 文件包含文档和更多示例。

Answer 7

MD5 是一种哈希算法，不需要为此使用笨重的 CommonCrypto 库（并被 Apple 审查拒绝），只需使用任何 md5 哈希库即可。

我使用的一个这样的库是 SwiftHash, a pure swift implementation of MD5 (based on http://pajhome.org.uk/crypt/md5/md5.html)

Answer 8

在阅读了此处的其他答案（并且还需要支持其他哈希类型）后，我编写了一个 String 扩展来处理多种哈希类型和输出类型。

注意：CommonCrypto 包含在 Xcode 10 中，因此如果您拥有最新的 Xcode，您可以简单地 import CommonCrypto 而不必弄乱桥接头安装的版本...否则需要桥接头。

更新：Swift 4 和 5 使用下面相同的 String+Crypto.swift 文件。

Swift 5（见下文）有一个单独的 Data+Crypto.swift 文件，因为 'withUnsafeMutableBytes' 和 'withUnsafeBytes' 的 api 在 Swift 4 & 5.

String+Crypto.swift -- （对于 Swift 4 和 5）

import Foundation
import CommonCrypto

// Defines types of hash string outputs available
public enum HashOutputType {
    // standard hex string output
    case hex
    // base 64 encoded string output
    case base64
}

// Defines types of hash algorithms available
public enum HashType {
    case md5
    case sha1
    case sha224
    case sha256
    case sha384
    case sha512

    var length: Int32 {
        switch self {
        case .md5: return CC_MD5_DIGEST_LENGTH
        case .sha1: return CC_SHA1_DIGEST_LENGTH
        case .sha224: return CC_SHA224_DIGEST_LENGTH
        case .sha256: return CC_SHA256_DIGEST_LENGTH
        case .sha384: return CC_SHA384_DIGEST_LENGTH
        case .sha512: return CC_SHA512_DIGEST_LENGTH
        }
    }
}

public extension String {

    /// Hashing algorithm for hashing a string instance.
    ///
    /// - Parameters:
    ///   - type: The type of hash to use.
    ///   - output: The type of output desired, defaults to .hex.
    /// - Returns: The requested hash output or nil if failure.
    public func hashed(_ type: HashType, output: HashOutputType = .hex) -> String? {

        // convert string to utf8 encoded data
        guard let message = data(using: .utf8) else { return nil }
        return message.hashed(type, output: output)
    } 
}

SWIFT 5 -- 数据+Crypto.swift

import Foundation
import CommonCrypto

extension Data {

    /// Hashing algorithm that prepends an RSA2048ASN1Header to the beginning of the data being hashed.
    ///
    /// - Parameters:
    ///   - type: The type of hash algorithm to use for the hashing operation.
    ///   - output: The type of output string desired.
    /// - Returns: A hash string using the specified hashing algorithm, or nil.
    public func hashWithRSA2048Asn1Header(_ type: HashType, output: HashOutputType = .hex) -> String? {

        let rsa2048Asn1Header:[UInt8] = [
            0x30, 0x82, 0x01, 0x22, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
            0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x82, 0x01, 0x0f, 0x00
        ]

        var headerData = Data(rsa2048Asn1Header)
        headerData.append(self)

        return hashed(type, output: output)
    }

    /// Hashing algorithm for hashing a Data instance.
    ///
    /// - Parameters:
    ///   - type: The type of hash to use.
    ///   - output: The type of hash output desired, defaults to .hex.
    ///   - Returns: The requested hash output or nil if failure.
    public func hashed(_ type: HashType, output: HashOutputType = .hex) -> String? {

        // setup data variable to hold hashed value
        var digest = Data(count: Int(type.length))

        _ = digest.withUnsafeMutableBytes{ digestBytes -> UInt8 in
            self.withUnsafeBytes { messageBytes -> UInt8 in
                if let mb = messageBytes.baseAddress, let db = digestBytes.bindMemory(to: UInt8.self).baseAddress {
                    let length = CC_LONG(self.count)
                    switch type {
                    case .md5: CC_MD5(mb, length, db)
                    case .sha1: CC_SHA1(mb, length, db)
                    case .sha224: CC_SHA224(mb, length, db)
                    case .sha256: CC_SHA256(mb, length, db)
                    case .sha384: CC_SHA384(mb, length, db)
                    case .sha512: CC_SHA512(mb, length, db)
                    }
                }
                return 0
            }
        }

        // return the value based on the specified output type.
        switch output {
        case .hex: return digest.map { String(format: "%02hhx", [=11=]) }.joined()
        case .base64: return digest.base64EncodedString()
        }
    }
}

SWIFT 4 -- 数据+Crypto.swift

import Foundation
import CommonCrypto 

extension Data {

    /// Hashing algorithm that prepends an RSA2048ASN1Header to the beginning of the data being hashed.
    ///
    /// - Parameters:
    ///   - type: The type of hash algorithm to use for the hashing operation.
    ///   - output: The type of output string desired.
    /// - Returns: A hash string using the specified hashing algorithm, or nil.
    public func hashWithRSA2048Asn1Header(_ type: HashType, output: HashOutputType = .hex) -> String? {

        let rsa2048Asn1Header:[UInt8] = [
            0x30, 0x82, 0x01, 0x22, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
            0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x82, 0x01, 0x0f, 0x00
        ]

        var headerData = Data(bytes: rsa2048Asn1Header)
        headerData.append(self)

        return hashed(type, output: output)
    }

    /// Hashing algorithm for hashing a Data instance.
    ///
    /// - Parameters:
    ///   - type: The type of hash to use.
    ///   - output: The type of hash output desired, defaults to .hex.
    ///   - Returns: The requested hash output or nil if failure.
    public func hashed(_ type: HashType, output: HashOutputType = .hex) -> String? {

        // setup data variable to hold hashed value
        var digest = Data(count: Int(type.length))

        // generate hash using specified hash type
        _ = digest.withUnsafeMutableBytes { (digestBytes: UnsafeMutablePointer<UInt8>) in
            self.withUnsafeBytes { (messageBytes: UnsafePointer<UInt8>) in
                let length = CC_LONG(self.count)
                switch type {
                case .md5: CC_MD5(messageBytes, length, digestBytes)
                case .sha1: CC_SHA1(messageBytes, length, digestBytes)
                case .sha224: CC_SHA224(messageBytes, length, digestBytes)
                case .sha256: CC_SHA256(messageBytes, length, digestBytes)
                case .sha384: CC_SHA384(messageBytes, length, digestBytes)
                case .sha512: CC_SHA512(messageBytes, length, digestBytes)
                }
            }
        }

        // return the value based on the specified output type.
        switch output {
        case .hex: return digest.map { String(format: "%02hhx", [=12=]) }.joined()
        case .base64: return digest.base64EncodedString()
        }
    }
}

编辑：因为散列实际上发生在数据上，所以我将散列算法拆分为数据扩展。这也允许将相同的算法用于 SSL 证书固定哈希操作。

这是一个简短的示例，说明如何将其用于 SSL 固定操作：

// Certificate pinning - get certificate as data
let data: Data = SecCertificateCopyData(serverCertificate) as Data

// compare hash of server certificate with local (expected) hash value
guard let serverHash = data.hashWithRSA2048Asn1Header(.sha256, output: .base64), serverHash == storedHash else {
    print("SSL PINNING: Server certificate hash does not match specified hash value.")
    return false
}

返回原答案

我用这个测试了哈希算法：

let value = "This is my string"

if let md5 = value.hashed(.md5) {
    print("md5: \(md5)")
}
if let sha1 = value.hashed(.sha1) {
    print("sha1: \(sha1)")
}
if let sha224 = value.hashed(.sha224) {
    print("sha224: \(sha224)")
}
if let sha256 = value.hashed(.sha256) {
    print("sha256: \(sha256)")
}
if let sha384 = value.hashed(.sha384) {
    print("sha384: \(sha384)")
}
if let sha512 = value.hashed(.sha512) {
    print("sha512: \(sha512)")
}

这是打印结果：

md5: c2a9ce57e8df081b4baad80d81868bbb
sha1: 37fb219bf98bee51d2fdc3ba6d866c97f06c8223
sha224: f88e2f20aa89fb4dffb6bdc62d7bd75e1ba02574fae4a437c3bf49c7
sha256: 9da6c02379110815278b615f015f0b254fd3d5a691c9d8abf8141655982c046b
sha384: d9d7fc8aefe7f8f0a969b132a59070836397147338e454acc6e65ca616099d03a61fcf9cc8c4d45a2623145ebd398450
sha512: 349cc35836ba85915ace9d7f895b712fe018452bb4b20ff257257e12adeb1e83ad780c6568a12d03f5b2cb1e3da23b8b7ced9012a188ef3855e0a8f3db211883

Answer 9

我发现这个库似乎工作得很好。

https://github.com/onmyway133/SwiftHash

MD5("string")

Answer 10

Swift 4.* , Xcode 10 更新:

在Xcode10中你不必再使用Bridging-Header，你可以直接使用

导入

import CommonCrypto

然后写一个类似这样的方法：

func MD5(_ string: String) -> String? {
        let length = Int(CC_MD5_DIGEST_LENGTH)
        var digest = [UInt8](repeating: 0, count: length)

        if let d = string.data(using: String.Encoding.utf8) {
            _ = d.withUnsafeBytes { (body: UnsafePointer<UInt8>) in
                CC_MD5(body, CC_LONG(d.count), &digest)
            }
        }

        return (0..<length).reduce("") {
            [=11=] + String(format: "%02x", digest[])
        }
    }

用法：

MD5("This is my string")

输出：

c2a9ce57e8df081b4baad80d81868bbb

Answer 11

Swift 5 答案作为字符串扩展（基于）：

import CommonCrypto

extension String {
    var md5Value: String {
        let length = Int(CC_MD5_DIGEST_LENGTH)
        var digest = [UInt8](repeating: 0, count: length)

        if let d = self.data(using: .utf8) {
            _ = d.withUnsafeBytes { body -> String in
                CC_MD5(body.baseAddress, CC_LONG(d.count), &digest)

                return ""
            }
        }

        return (0 ..< length).reduce("") {
            [=10=] + String(format: "%02x", digest[])
        }
    }
}

用法：

print("test".md5Value) /*098f6bcd4621d373cade4e832627b4f6*/

Answer 12

在swift编程中最好做一个字符串函数，使用起来会方便一些。在这里，我使用上面给出的解决方案之一进行 String 扩展。谢谢@wajih

import Foundation
import CommonCrypto

extension String {

func md5() -> String {

    let context = UnsafeMutablePointer<CC_MD5_CTX>.allocate(capacity: 1)
    var digest = Array<UInt8>(repeating:0, count:Int(CC_MD5_DIGEST_LENGTH))
    CC_MD5_Init(context)
    CC_MD5_Update(context, self, CC_LONG(self.lengthOfBytes(using: String.Encoding.utf8)))
    CC_MD5_Final(&digest, context)
    context.deallocate()
    var hexString = ""
    for byte in digest {
        hexString += String(format:"%02x", byte)
    }

    return hexString
}
}

用法

let md5String = "abc".md5()

Answer 13

我的两分钱（如果你需要快速 md5 用于 Data/NSData，例如你为磁盘或网络下载或读取二进制文件）

(无耻来自"Swift 5 answer as a String extension (based on the great answer of Invictus Cody")):

extension Data {
    var md5Value: String {
        let length = Int(CC_MD5_DIGEST_LENGTH)
        var digest = [UInt8](repeating: 0, count: length)

        _ = self.withUnsafeBytes { body -> String in
            CC_MD5(body.baseAddress, CC_LONG(self.count), &digest)
            return ""
        }


        return (0 ..< length).reduce("") {
            [=10=] + String(format: "%02x", digest[])
        }
    }
}

测试：

print("test".data.md5Value) /*098f6bcd4621d373cade4e832627b4f6*/

Answer 14

基于，我有一个想法，我们应该弄清楚MD5的结果是什么，因为我们可能会将结果用作十六进制字符串或Base64字符串。

func md5(_ string: String) -> [UInt8] {
    let length = Int(CC_MD5_DIGEST_LENGTH)
    var digest = [UInt8](repeating: 0, count: length)

    if let d = string.data(using: String.Encoding.utf8) {
        _ = d.withUnsafeBytes { (body: UnsafePointer<UInt8>) in
            CC_MD5(body, CC_LONG(d.count), &digest)
        }
    }
    return digest
}

上面的函数其实是returns一个[UInt8]，根据这个结果，我们可以得到任意形式的字符串，比如hex，base64。

如果想要一个十六进制字符串作为最终结果（如问题所问），我们可以继续使用

的其余部分

extension String {
    var md5Hex: String {
        let length = Int(CC_MD5_DIGEST_LENGTH)
        return (0..<length).reduce("") {
            [=11=] + String(format: "%02x", digest[])
        }
    }
}

如果想要一个Base64字符串作为最终结果

extension String {
    var md5Base64: String {
        let md5edData = Data(bytes: md5(self))
        return md5edData.base64EncodedString()
    }
}

Answer 15

自 iOS13 Apple 添加了 CryptoKit 框架，因此您不再需要导入 CommonCrypto 或处理其 C API:

import Foundation
import CryptoKit

func MD5(string: String) -> String {
    let digest = Insecure.MD5.hash(data: string.data(using: .utf8) ?? Data())

    return digest.map {
        String(format: "%02hhx", [=10=])
    }.joined()
}

Answer 16

Swift 5 的答案，具有适当的内存管理且方法内部没有 String class：

typealias CBridgeCryptoMethodType = (UnsafeRawPointer?,
                                 UInt32,
                                 UnsafeMutablePointer<UInt8>?)
-> UnsafeMutablePointer<UInt8>?

private enum HashType {

    // MARK: - Cases

    case md5
    case sha1
    case sha224
    case sha256
    case sha384
    case sha512
}

extension Data {
    var hexString: String {
        let localHexString = reduce("", { previous, current in
            return previous + String(format: "%02X", current)
        })
        return localHexString
    }
    var md5: Data {
        return hashed(for: .md5)
    }
    var sha1: Data {
        return hashed(for: .sha1)
    }
    var sha224: Data {
        return hashed(for: .sha224)
    }
    var sha256: Data {
        return hashed(for: .sha256)
    }
    var sha384: Data {
        return hashed(for: .sha384)
    }
    var sha512: Data {
        return hashed(for: .sha512)
    }

    private func hashed(for hashType: HashType) -> Data {
        return withUnsafeBytes { (rawBytesPointer: UnsafeRawBufferPointer) -> Data in
            guard let bytes = rawBytesPointer.baseAddress?.assumingMemoryBound(to: Float.self) else {
                return Data()
            }
            let hashMethod: CBridgeCryptoMethodType
            let digestLength: Int
            switch hashType {
            case .md5:
                hashMethod = CC_MD5
                digestLength = Int(CC_MD5_DIGEST_LENGTH)
            case .sha1:
                hashMethod = CC_SHA1
                digestLength = Int(CC_SHA1_DIGEST_LENGTH)
            case .sha224:
                hashMethod = CC_SHA224
                digestLength = Int(CC_SHA224_DIGEST_LENGTH)
            case .sha256:
                hashMethod = CC_SHA256
                digestLength = Int(CC_SHA256_DIGEST_LENGTH)
            case .sha384:
                hashMethod = CC_SHA384
                digestLength = Int(CC_SHA384_DIGEST_LENGTH)
            case .sha512:
                hashMethod = CC_SHA512
                digestLength = Int(CC_SHA512_DIGEST_LENGTH)
            }
            let result = UnsafeMutablePointer<UInt8>.allocate(capacity: digestLength)
            _ = hashMethod(bytes, CC_LONG(count), result)
            let md5Data = Data(bytes: result, count: digestLength)
            result.deallocate()
            return md5Data
        }
    }
}

例子

let str = "The most secure string ever"
print("md5", str.data(using: .utf8)?.md5.hexString)
print("sha1", str.data(using: .utf8)?.sha1.hexString)
print("sha224", str.data(using: .utf8)?.sha224.hexString)
print("sha256", str.data(using: .utf8)?.sha256.hexString)
print("sha384", str.data(using: .utf8)?.sha384.hexString)
print("sha512", str.data(using: .utf8)?.sha512.hexString)

结果：

md5 Optional("671C121427F12FBBA66CEE71C44CB62C")

sha1 Optional("A6A40B223AE634CFC8C191DDE024BF0ACA56D7FA")

sha224 Optional("334370E82F2F5ECF5B2CA0910C6176D94CBA12FD6F518A7AB8D12ADE")

sha256 Optional("8CF5ED971D6EE2579B1BDEFD4921415AC03DA45B49B89665B3DF197287EFC89D")

sha384 Optional("04BB3551CBD60035BA7E0BAA141AEACE1EF5E17317A8FD108DA12A7A8E98C245E14F92CC1A241C732209EAC9D600602E")

sha512 Optional("1D595EAFEB2162672830885D336F75FD481548AC463BE16A8D98DB33637213F1AEB36FA4977B9C23A82A4FAB8A70C06AFC64C610D3CB1FE77A609DC8EE86AA68")

Answer 17

import CryptoKit
private func MD5Base64(_ string: String) -> String {
    let digest = Insecure.MD5.hash(data: string.data(using: .utf8) ?? Data())
    let digestString = digest.map { String(format: "%02hhx", [=10=]) }.joined()
    return digestString.toBase64()
}

extension String {
    func toBase64() -> String {
        return Data(self.utf8).base64EncodedString()
    }
}

Answer 18

在Swift5.3你可以做到

import CryptoKit

func md5Hash(_ source: String) -> String {
    return Insecure.MD5.hash(data: source.data(using: .utf8)!).map { String(format: "%02hhx", [=10=]) }.joined()
}

Answer 19

Swift 5.3：基于@Radu Ursache 和@mluisbrown 的回答：String

的简单扩展

import CryptoKit

extension String {
    func md5() -> String {
        return Insecure.MD5.hash(data: self.data(using: .utf8)!).map { String(format: "%02hhx", [=10=]) }.joined()
    }
}

用法：

"My awesome String".md5()

如何使用 Swift 将字符串转换为 iOS 中的 MD5 散列？

How can I convert a String to an MD5 hash in iOS using Swift?

md5

ios

swift

已弃用文档部分的示例：