如何在Swift 4中复制hash_hmac（'sha256'，$ key，$ secret_key）函数？ [英] How to replicate hash_hmac('sha256', $key, $secret_key) function in Swift 4?
问题描述
在使用像CommonCrypto，CryptoSwift这样的库之后，我尝试了在Swift 4中生成相当于hash_hmac（'sha256'，$ key，$ secret_key）的php函数，但没有成功。我需要这些函数进行API认证，使用Alamofire库，这是一个很棒的库。因为我使用Swift 4，所以与其他Swift库的兼容性不太好。即使CryptoSwift具有Swift 4的最新版本（0.7.1），我仍然会遇到很多兼容错误，比如
解决方案
b
$ b
具有MD5，SHA1，SHA224，SHA256，SHA384，SHA512的HMAC（Swift 3）
这些函数会使用八种密码散列算法之一散列字符串或数据输入。
name参数将散列函数名称指定为字符串
支持的函数是MD5，SHA1，SHA224，SHA256，SHA384和SHA512
这个例子需要Common Crypto
必须有该项目的桥接头：
#import< CommonCrypto / CommonCrypto.h>
将Security.framework添加到该项目。
这些函数需要一个散列名，消息被散列，一个键并返回一个摘要：
hashName：作为字符串的散列函数的名称
message：作为数据的消息
key：作为数据的
返回：摘要为数据
func hmac（hashName：String，message：Data，key：Data） - >数据？ {
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
}
< $ p $ b>
hashName：作为字符串的散列函数的名称
消息：作为字符串的消息
key：作为字符串的键
返回：作为数据的摘要
func hmac（hashName：String，message：String，key：String） - >数据？ {
let messageData = message.data（使用：.utf8）！
let keyData = key.data（使用：.utf8）！
返回hmac（hashName：hashName，message：messageData，key：keyData）
}
hashName：作为字符串的散列函数的名称
消息：消息作为字符串
key：键作为数据
返回：摘要为数据
func hmac（hashName：String，message：String，key ：Data） - >数据？ {
let messageData = message.data（使用：.utf8）！
返回hmac（hashName：hashName，message：messageData，key：key）
}
//示例
let clearString =clearData0123456
让keyString =keyData8901234562
让clearData = clearString.data（使用：.utf8）！
let keyData = keyString.data（使用：.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 ！）作为NSData））
输出：
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>
I've tried generating the hash_hmac('sha256', $key, $secret_key) php function equivalent in Swift 4 without success, after using libraries like CommonCrypto, CryptoSwift. I need these function for API authentication, using Alamofire library, which is a great library. Since i use Swift 4 the compatibility with other Swift libraries is not so good. Even with CryptoSwift which has the latest version(0.7.1) for Swift 4 i still get a lot of compatibility errors likes enter image description here
Swift 3/4:
HMAC with MD5, SHA1, SHA224, SHA256, SHA384, SHA512 (Swift 3)
These functions will hash either String or Data input with one of eight cryptographic hash algorithms.
The name parameter specifies the hash function name as a String Supported functions are MD5, SHA1, SHA224, SHA256, SHA384 and SHA512
This example requires Common Crypto
It is necessary to have a bridging header to the project:
#import <CommonCrypto/CommonCrypto.h>
Add the Security.framework to the project.
These functions takes a hash name, message to be hashed, a key and return a digest:
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)
}
// Examples
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>
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