我试图在Swift中创建一个字符串的HMAC SHA-1散列，但由于它似乎没有导入CommonCrypto框架，所以无法理解如何与API交互.我try 过各种不同形式的"导入CommonCrypto"和创建桥接头文件，但都没有效果.
奇怪的是，如果我创建一个Objective-C类，我就能够与API进行交互，而没有任何问题，所以这似乎是Swift独有的.
另外，如果有人能告诉我Swift中uint8_t digest[CC_SHA1_DIGEST_LENGTH]的类似功能是什么，我将非常感激
你可以用Swift .只需确保在Bridgeting Objective-C Bridgeting标题中添加#import <CommonCrypto/CommonHMAC.h>即可.
Update:对于Swift 4，请参阅使用Swift软件包管理器的更好解决方案:https://github.com/jernejstrasner/SwiftCrypto
enum Crypto算法rithm {
case MD5, SHA1, SHA224, SHA256, SHA384, SHA512
var HMAC算法rithm: CCHmac算法rithm {
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 CCHmac算法rithm(result)
}
var digestLength: Int {
var result: Int32 = 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: Crypto算法rithm, key: String) -> String {
let str = self.cStringUsingEncoding(NSUTF8StringEncoding)
let strLen = Int(self.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))
let digestLen = algorithm.digestLength
let result = UnsafeMutablePointer<CUnsignedChar>.alloc(digestLen)
let keyStr = key.cStringUsingEncoding(NSUTF8StringEncoding)
let keyLen = Int(key.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))
CCHmac(algorithm.HMAC算法rithm, keyStr!, keyLen, str!, strLen, result)
let digest = stringFromResult(result, length: digestLen)
result.dealloc(digestLen)
return digest
}
private func stringFromResult(result: UnsafeMutablePointer<CUnsignedChar>, length: Int) -> String {
var hash = NSMutableString()
for i in 0..<length {
hash.appendFormat("%02x", result[i])
}
return String(hash)
}
}