AES/RSA/MD2/MD5/SHA1/SHA128/SHA384/SHA512 in Swift

可以参考github: https://github.com/adow/SecrecySwift

https://github.com/SwiftP2P/SwiftSSL

swift实现sha1加密算法，需要现在beidge-header文件中添加下述语句

// sha1
#import <CommonCrypto/CommonHMAC.h>
sha1：
import UIKit
extension String{
    func sha1() -> String{
        let data = self.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)!
        var digest = [UInt8](count:Int(CC_SHA1_DIGEST_LENGTH),repeatedValue:0)
        CC_SHA1(data.bytes, CC_LONG(data.length), &digest)
        let output = NSMutableString(capacity: Int(CC_SHA1_DIGEST_LENGTH))
        for byte in digest{
            output.appendFormat("%02x", byte)
        return output as String
MD5：(对比一下sha1的方法，改动不大，其他几种也应该差不多)
extension String{
    func md5() -> String{
        let data = self.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)!
        var digest = [UInt8](count:Int(CC_MD5_DIGEST_LENGTH),repeatedValue:0)
        CC_MD5(data.bytes, CC_LONG(data.length), &digest)
        let output = NSMutableString(capacity: Int(CC_MD5_DIGEST_LENGTH))
        for byte in digest{
            output.appendFormat("%02x", byte)
        return output as String
hmac加密:
// MARK: - HMAC加密 需要秘钥
enum CryptoAlgorithm {
    case MD5, SHA1, SHA224, SHA256, SHA384, SHA512
    var HMACAlgorithm: 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)
    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: CryptoAlgorithm, 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.HMACAlgorithm, 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 {
        let hash = NSMutableString()
        for i in 0..<length {
            hash.appendFormat("%02x", result[i])
        return String(hash)