在swift中实现HMAC和SHA1加密 [英] Implementing HMAC and SHA1 encryption in swift
本文介绍了在swift中实现HMAC和SHA1加密的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我对Swift相对较新,而且我使用HMAC和SHA1加密加密。我找到了以下答案 https://stackoverflow.com/a/24411522/4188344 但我无法弄清楚如何正确实施这一点。任何帮助都会很棒。
I am relatively new to Swift and i'm stuck encrypting using HMAC and SHA1. I Found the following answer https://stackoverflow.com/a/24411522/4188344 but i can't work out how to implement this properly. Any help would be amazing.
推荐答案
问题解决了!首先我没有正确使用字符串函数...我最终得到了这个:
Problem solved! First off i wasn't using the string function properly... I ended up with this:
let hmacResult:String = "myStringToHMAC".hmac(HMACAlgorithm.SHA1, key: "myKey")
然后我忘记了我需要to base64编码hmac结果。所以我修改了我的问题中链接的字符串函数...
Then I had forgotten I needed to base64 encode the hmac result. So i modified the string function linked in my question to...
enum HMACAlgorithm {
case MD5, SHA1, SHA224, SHA256, SHA384, SHA512
func toCCHmacAlgorithm() -> CCHmacAlgorithm {
var result: Int = 0
switch self {
case .MD5:
result = kCCHmacAlgMD5
case .SHA1:
result = kCCHmacAlgSHA1
case .SHA224:
result = kCCHmacAlgSHA224
case .SHA256:
result = kCCHmacAlgSHA256
case .SHA384:
result = kCCHmacAlgSHA384
case .SHA512:
result = kCCHmacAlgSHA512
}
return CCHmacAlgorithm(result)
}
func digestLength() -> Int {
var result: CInt = 0
switch self {
case .MD5:
result = CC_MD5_DIGEST_LENGTH
case .SHA1:
result = CC_SHA1_DIGEST_LENGTH
case .SHA224:
result = CC_SHA224_DIGEST_LENGTH
case .SHA256:
result = CC_SHA256_DIGEST_LENGTH
case .SHA384:
result = CC_SHA384_DIGEST_LENGTH
case .SHA512:
result = CC_SHA512_DIGEST_LENGTH
}
return Int(result)
}
}
extension String {
func hmac(algorithm: HMACAlgorithm, key: String) -> String {
let cKey = key.cStringUsingEncoding(NSUTF8StringEncoding)
let cData = self.cStringUsingEncoding(NSUTF8StringEncoding)
var result = [CUnsignedChar](count: Int(algorithm.digestLength()), repeatedValue: 0)
CCHmac(algorithm.toCCHmacAlgorithm(), cKey!, strlen(cKey!), cData!, strlen(cData!), &result)
var hmacData:NSData = NSData(bytes: result, length: (Int(algorithm.digestLength())))
var hmacBase64 = hmacData.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.Encoding76CharacterLineLength)
return String(hmacBase64)
}
}
这给了我正确的结果
lGCtbW+DNHFraNoxPGK3trgM/98=
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